CN116241510A - Fan Mounting Structures and RV Air Conditioning - Google Patents

Abstract

The invention relates to the technical field of motor home air conditioners, in particular to a fan mounting structure and a motor home air conditioner, and aims to solve the problems of friction, collision and noise emission of a volute and a fan. To this end, the present invention provides a fan mounting structure comprising a chassis; the fan assembly is fixedly connected to the chassis, and the length of a cantilever from the fan assembly to the chassis is L; the volute is arranged on the chassis, and a preset gap is arranged between the fan body and the volute; setting the sum of deviation of the chassis, the fan assembly and the volute to reduce the preset gap as a, deflecting the fan assembly to the direction of increasing the preset gap by taking the joint of the fan assembly and the chassis as the vertex

Degree. The invention also provides a motor home air conditioner which adopts the fan mounting structure. According to the invention, the deflection angle is set to offset the deviation a, so that a preset gap is still reserved between the fan body and the volute, and friction, collision or noise and other conditions can not occur.

Description

Fan Mounting Structures and RV Air Conditioning

technical field

The invention relates to the technical field of caravan air conditioners, and specifically provides a fan installation structure and a caravan air conditioner.

Background technique

At present, the RV air-conditioning products with dual-motor mode on the market have indoor motor centrifugal fans. This type of fan is usually attached to a relatively long motor shaft, thus forming a cantilever structure. This cantilever structure is prone to deflection and deformation, and the influence of the weight of the fan located at the end of the motor shaft on the cantilever is superimposed. After a long time of use, it is very easy to cause the fan to sag, and then it will not be compatible with other structures (such as the air duct outside the fan. Shell) collides and rubs, and causes quality problems such as noise or collision damage and deformation.

Generally, in order to solve the above-mentioned sagging problem of the cantilever structure, a preset gap is set between the fan and the volute. In this way, even if the fan sags slightly, it is not easy to collide with the volute.

However, parts such as fans, motors and volutes have manufacturing deviations and installation deviations on the premise that they can meet the design requirements during manufacture and installation. When these deviations are superimposed with the deflection deformation of the cantilever structure, it is easy to cause the sag of the fan to exceed the preset clearance, and problems such as collision and friction may still occur.

Moreover, if the preset gap is further increased in order to solve the above problems, the overall structure of the fan assembly will be too large and occupy more space, which is not conducive to the miniaturization of the product.

Therefore, there is an urgent need in the art for a fan installation structure and a car air conditioner to solve the above problems.

Contents of the invention

The present invention aims to solve the above technical problems, that is, to solve the problems of friction, collision and noise between the volute and the fan caused by the sagging of the cantilevered fan.

In a first aspect, the present invention provides a fan installation structure, the fan installation structure comprising:

chassis;

A fan assembly, the fan assembly includes a fan body, the fan assembly is fixedly connected to the chassis, and the cantilever length from the fan assembly to the chassis is L;

A volute, the volute is arranged on the chassis, and the preset gap is set between the fan body and the volute;

度。Set the sum of the deviations of the chassis, the fan assembly and the volute to reduce the preset gap to be a, then make the fan assembly connect with the chassis as the apex to make the preset Deflection in direction of gap increase

Spend.

In a specific embodiment of the above fan installation structure, the fan assembly further includes:

A motor, which includes a motor body and a motor shaft, one end of the motor shaft is fixedly connected to the fan body, and the other end is connected to the motor body;

In a specific embodiment of the above fan installation structure, the fan assembly further includes:

A bracket, the motor body is fixedly connected to the bracket, and the bracket is fixedly connected to the chassis.

In a specific implementation manner of the above-mentioned fan installation structure, the bracket is connected to the chassis through a plurality of threaded fasteners.

In a specific implementation manner of the fan installation structure above, the length of the cantilever is the distance from the threaded fastener farthest from the fan body to the outer end surface of the fan body.

In a specific implementation manner of the above-mentioned fan installation structure, there is a first installation deviation between the bracket and the chassis to reduce the preset gap.

In a specific implementation manner of the above fan installation structure, the bracket has a size deviation of the bracket that reduces the preset gap.

In a specific embodiment of the above fan installation structure, the volute has a dimensional deviation that reduces the preset clearance.

In a specific implementation manner of the fan installation structure above, the sum a of the deviations is the sum of the first installation deviation, the size deviation of the bracket and the size deviation of the volute.

In a third aspect, the present invention provides an air conditioner for a caravan, including a fan assembly, a chassis, and a volute, and the fan assembly, the chassis, and the volute adopt the above-mentioned fan installation structure.

度。通过设置上述偏转角度，即使因底盘、风扇组件与蜗壳的制造尺寸偏差和安装偏差而使风扇本体发生下垂，由于该偏转角度使风扇本体向上抬升，且抬升距离能够与下垂距离相抵消，风扇本体与蜗壳之间依然会保留一定间隙，避免发生摩擦、碰撞或噪音等质量问题，从而延长房车空调的使用寿命，使房车空调运行得更平稳安静。In the case of adopting the above technical solution, the present invention obtains the sum a of the deviations between the chassis, the fan assembly and the volute that will cause the preset gap between the fan body and the volute to be reduced, and the cantilever length L of the fan assembly, and according to a and L to deflect the fan assembly in a direction that increases the preset clearance

Spend. By setting the above-mentioned deflection angle, even if the fan body sags due to the manufacturing size deviation and installation deviation of the chassis, fan assembly and volute, the fan body will be lifted upward due to the deflection angle, and the lifting distance can be offset by the drooping distance, and the fan There will still be a certain gap between the body and the volute to avoid quality problems such as friction, collision or noise, thereby prolonging the service life of the RV air conditioner and making the RV air conditioner run more smoothly and quietly.

Specifically, the fan assembly includes a fan body, a motor and a bracket, the fan body is fixedly connected to the motor shaft of the motor, the motor body of the motor is fixedly connected to the bracket, and the bracket is fixedly connected to the chassis through a plurality of threaded fasteners. For the fan assembly with the above structure, the sum of deviation a includes the first installation deviation between the bracket and the chassis, the size deviation of the bracket and the size deviation of the volute; the cantilever length L is the threaded fastener farthest from the fan body to the outside of the fan body end face distance. By combining the first installation deviation, the size deviation of the bracket and the size deviation of the volute, the deflection angle of the fan is adjusted, which can effectively offset the excessive droop of the fan body, thereby avoiding friction and collision.

Description of drawings

Describe preferred embodiment of the present invention below in conjunction with accompanying drawing, in the accompanying drawing:

Fig. 1 is a schematic diagram of the fan installation structure of the car air conditioner provided by the present invention;

Fig. 2 is a schematic diagram of the chassis structure of the caravan air conditioner provided by the present invention;

Fig. 3 is a schematic structural view of the fan assembly of the caravan air conditioner provided by the present invention;

Fig. 4 is a schematic view of the volute structure of the car air conditioner provided by the present invention;

Fig. 5 is a schematic cross-sectional structural view of the installation of the fan of the car air conditioner provided by the present invention;

Fig. 6 is a structural diagram of the deflected fan assembly of the car air conditioner provided by the present invention, wherein the dotted line is a horizontal plane to show the deflection angle of the fan assembly.

List of reference signs:

1. Chassis; 2. Fan assembly; 21. Fan body; 221. Motor body; 222. Motor shaft; 23. Bracket; 3. Volute; 31. Volute tongue; 4. Preset clearance; 5. First bolt; 6. The second bolt.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

It should be noted that, in the description of the present invention, terms such as "upper", "lower", "left", "right", "inner", "outer" and other indicated directions or positional relationships are based on the terms shown in the accompanying drawings. The direction or positional relationship shown is only for convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In addition, it should be noted that, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a It is a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediary, or can be internally connected between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In order to solve the problem of friction, collision and noise between the volute 3 and the fan body 21 caused by the cantilever-shaped fan drooping, this embodiment discloses an air conditioner for a caravan.

What needs to be explained about the RV air conditioner is that although this embodiment describes the deflection angle of the cantilever structure for the structure of the fan assembly 2, chassis 1, and volute 3 of the RV air conditioner, this is not a limitation of the present invention. Under the premise of the principle of the invention, those skilled in the art can also adopt other arrangements in other embodiments, for example: apply the deflection of the cantilever structure provided by the present invention to other fan structures or other similar cantilever structures to solve similar cantilever sagging problem. None of these deviate from the basic principle of the present invention, and thus all will fall within the scope of the present invention.

Referring to FIG. 1 , the RV air conditioner includes a chassis 1 , a fan assembly 2 and a volute 3 .

Referring to FIG. 2 , the chassis 1 is used to install the fan assembly 2 and the volute 3 .

Referring to FIG. 3 , the fan assembly 2 includes a fan body 21 , a motor and a bracket 23 .

The shape of the fan body 21 is specifically cylindrical.

The motor includes a motor body 221 and a motor shaft 222. One end of the motor shaft 222 is fixedly connected to the fan body 21, and the other end of the motor shaft 222 is rotatably connected to the motor body 221. The motor body 221 can drive the motor shaft 222 to rotate and drive the fan body 21 to rotate. .

Continuing to refer to FIG. 1 , the motor body 221 is installed on the bracket 23 , and the bracket 23 is installed on the chassis 1 . Specifically, the bracket 23 is connected to the chassis 1 through four bolts. Since the fan body 21, the motor shaft 222, the motor body 221, the bracket 23 and the chassis 1 are sequentially connected, the fan body 21, the motor shaft 222, the motor body 221 and the bracket 23 (that is, the fan assembly 2) can be regarded as one end fixedly connected to the chassis 1 cantilever structure.

What needs to be explained about the fan assembly 2 is that although the fan assembly 2 of this embodiment includes structures such as a fan body 21, a motor, and a bracket 23, this is not a limitation of the present invention. Those skilled in the art can also adopt other arrangements in other embodiments, for example: the motor can be directly installed on the chassis 1 without the support 23; or the support 23 is not connected to the chassis 1 by bolts or other threaded fasteners, but Use other fixed connection methods such as integral molding, bonding, clamping or welding. None of these deviate from the basic principles of the present invention, and therefore also fall within the scope of the present invention.

Referring to FIGS. 1 and 4 , the volute 3 is also installed on the chassis 1 . The volute 3 includes a volute tongue 31, the volute tongue 31 is covered outside the peripheral surface of the fan body 21, and there is a preset gap 4 between the volute tongue 31 and the fan body 21 (see Figure 5 for details), so as to prevent the fan body 21 from rotating. , frictional collision with the volute tongue 31 occurs. In this embodiment, the original design value of the preset gap 4 is 10mm.

As shown in Figure 6, in this embodiment, on the basis of the original design value of the above preset gap 4, a deflection angle is set on the cantilever structure of the fan assembly 2, and the deflection angle will make the fan body 21 rise upwards, thereby increasing the The preset gap 4 between the fan body 21 and the volute tongue 31 is to offset the sagging of the fan body 21 caused by the manufacturing size deviation and the installation deviation, so as to avoid friction, collision and noise generation between the volute 3 and the cantilevered fan body 21 question. Specifically, for the structure in which the volute 3 or volute tongue 31 is covered outside the fan body 21, at least the gap between the lower part of the fan body 21 and the volute 3 or volute tongue 31 should be increased to offset the sagging of the fan body 21 , to avoid frictional collisions.

其中a为底盘1、风扇组件2和蜗壳3的使预设间隙4缩小的偏差之和，L为风扇组件2的悬臂结构的长度。Specifically, the angle of the deflection angle is

Where a is the sum of the deviations of the chassis 1 , the fan assembly 2 and the volute 3 to reduce the preset gap 4 , and L is the length of the cantilever structure of the fan assembly 2 .

More specifically, the sum of deviations a includes the following deviations:

First, referring to Fig. 1 and Fig. 5, the four bolts between the bracket 23 and the chassis 1 include two first bolts 5 close to the fan body 21 (only one is shown in the figure) and two second bolts 5 away from the fan body 21. bolts 6 (only one is shown in the figure), and the distances between the two first bolts 5 and the fan body 21 are the same, and the distances between the two second bolts 6 and the fan body 21 are the same. When the bracket 23 was installed on the chassis 1, there was a second installation deviation in the up and down direction in Fig. 5 at the first bolt 5, and a third installation deviation in the up and down direction in Fig. 5 also existed at the second bolt 6. This deviation would make The preset gap 4 increases or decreases.

In order to calculate the limit case of reducing the preset gap 4 (that is, the limit case within the deviation range that meets the design requirements of the fan installation structure), the maximum design deviation in the second installation deviation orientation, and the maximum design deviation in the third installation deviation orientation , this deviation will cause the fan body 21 to incline downward, thereby reducing the preset gap 4;

In this embodiment, the total installation deviation of the first bolt 5 and the installation deviation of the second bolt 6 will reduce the preset gap 4 by 1 mm, which is the first time between the bracket 23 and the chassis 1 to reduce the preset gap 4 . Installation deviation.

Second, the bracket 23 has a bracket size deviation during manufacture. Specifically, the size deviation of the bracket means that the height of the bracket 23 is insufficient, which will reduce the installation height of the motor and the fan body 21 , thereby reducing the preset gap 4 between the fan body 21 and the volute tongue 31 . Similarly, in order to calculate the limit situation of reducing the preset gap 4, the deviation of the bracket size should also take the limit value. In this embodiment, the limit value at which the preset gap 4 is narrowed by the size deviation of the bracket is 1.8mm.

Third, there is a dimensional deviation of the volute 3 during manufacture. Specifically, the size deviation of the volute means that the installed volute tongue 31 is closer to the fan body 21 , so that the preset gap 4 between the fan body 21 and the volute tongue 31 is reduced. Similarly, in order to calculate the limit situation for reducing the preset gap 4, the volute size deviation should also take the limit value. In this embodiment, the dimensional deviation of the volute takes a limit value of 1mm.

To sum up, the sum a of the deviation is the sum of the first installation deviation, the size deviation of the bracket and the size deviation of the volute, that is, 3.8mm, which is rounded up to 4mm.

Regarding the deviation sum a, it should be noted that although the deviation sum a of this embodiment is the sum of the first installation deviation, the bracket size deviation and the volute size deviation, this is not a limitation of the present invention, without departing from the present invention Under the premise of the principle, those skilled in the art may also include other deviations that lead to the reduction of the preset gap 4 in other embodiments, such as: the manufacturing size deviation of the fan body 21, the bending deviation of the motor shaft 222, the distance between the motor shaft 222 and the motor The installation deviation of the main body 221, the installation deviation of the fan body 21 and the motor, etc. These do not deviate from the basic principle of the present invention, and all can be included in the sum of deviations a, so all will fall within the scope of the present invention.

In order to avoid friction and collision between the volute tongue 31 and the fan body 21 due to installation deviation and size deviation, the preset gap 4 between the lower part of the fan body 21 and the volute tongue 31 should be increased from the original design value of 10mm to 14mm.

In this embodiment, the cantilever length L of the fan assembly 2 is the distance from the second bolt 6 to the outer end surface of the fan body 21 .

Regarding the length L of the cantilever structure, it should be noted that although the length L of the cantilever structure in this embodiment is the distance from the second bolt 6 to the outer end surface of the fan body 21, this is not a limitation of the present invention, without departing from the principle of the present invention On the premise of , those skilled in the art should obtain the corresponding cantilever length or equivalent cantilever length according to the actual structure of the cantilever structure in other embodiments. None of these deviate from the basic principle of the present invention, and thus all will fall within the scope of the present invention.

之后，使支架23与底盘1的安装面向使预设间隙4增大的方向(即以第二螺栓6为顶点，使风扇本体21向上偏转的方向，详见图5与图6)偏转上述角度，也就是说，使风扇组件2整体偏转上述角度。这样就可以抵消因上述第一安装偏差、支架尺寸偏差与蜗壳尺寸偏差而造成的风扇本体21的下垂量，避免发生的风扇本体21与蜗舌31碰撞摩擦、发出噪音等问题。After the sum a of the deviation and the length L of the cantilever structure are known, the deflection angle can be calculated

Afterwards, make the mounting surface of the bracket 23 and the chassis 1 increase the preset gap 4 (that is, the direction in which the fan body 21 deflects upward with the second bolt 6 as the apex, see Figure 5 and Figure 6 for details) to deflect the above-mentioned angle , that is to say, the entire fan assembly 2 is deflected by the above-mentioned angle. In this way, the sagging of the fan body 21 caused by the first installation deviation, the size deviation of the bracket and the size deviation of the volute can be offset, and problems such as collision and friction between the fan body 21 and the volute tongue 31 and noise can be avoided.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings, but those skilled in the art will easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims (10)

1. A fan installation structure, characterized in that, comprising: Chassis(1); A fan assembly (2), which includes a fan body (21), the fan assembly (2) is fixedly connected to the chassis (1), and the cantilever length from the fan assembly (2) to the chassis (1) is L; A volute (3), which is arranged on the chassis (1), and there is a preset gap (4) between the fan body (21) and the volute (3); The fan assembly (2) deflects in a direction that increases the preset gap (4) with the junction with the chassis (1) as the apex

degree, wherein, a is the sum of the deviations of the chassis (1), the fan assembly (2) and the volute (3) to reduce the preset gap (4). 2. The fan installation structure according to claim 1, characterized in that, the fan assembly (2) comprises: The motor includes a motor body (221) and a motor shaft (222), the motor body (221) is arranged on the chassis (1), and the two ends of the motor shaft (222) are respectively connected to the fan body (21) and the output end of the motor body (221), the motor body (221) can drive the fan body (21) to rotate through the motor shaft (222). 3. The fan installation structure according to claim 2, characterized in that, the fan assembly (2) further comprises: A bracket (23), the bracket (23) is arranged on the chassis (1), and the motor body (221) is fixed on the bracket (23). 4. The fan installation structure according to claim 3, characterized in that, the bracket (23) is connected to the chassis (1) by a plurality of threaded fasteners. 5. The fan installation structure according to claim 4, characterized in that, the length of the cantilever is between the threaded fastener farthest from the fan body (21) and the outer end surface of the fan body (21). distance. 6. The fan installation structure according to claim 5, characterized in that there is a first installation deviation between the bracket (23) and the chassis (1) to reduce the preset gap (4). 7. The fan installation structure according to claim 6, characterized in that, the bracket (23) has a bracket size deviation that reduces the preset gap (4). 8. The fan installation structure according to claim 7, characterized in that, the volute (3) has a volute size deviation that reduces the preset gap (4). 9 . The fan installation structure according to claim 8 , wherein the sum a of the deviations is the sum of the first installation deviation, the size deviation of the bracket and the size deviation of the volute. 10 . 10. An air conditioner for a caravan, comprising a fan assembly (2), a chassis (1) and a volute (3), characterized in that the fan assembly (2), the chassis (1) and the volute (3 ) adopts the fan mounting structure as claimed in claims 1-9.

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