Fan assembly based on simple centrifugal air duct and cabinet air conditioner thereof

Abstract

The utility model discloses a fan assembly based on a simple centrifugal air duct, which is arranged in the centrifugal air duct formed in a cabinet shell and comprises a volute-free centrifugal fan, the air inlet end of the centrifugal fan is mounted in the middle of an air duct plate formed on the rear side of the centrifugal air duct, and a motor is arranged at one end of the centrifugal fan far away from the air inlet end of the centrifugal fan. The motor is mounted in the middle of a mounting plate formed on the front side of the centrifugal air duct through a connecting part; a plurality of positioning columns are formed on the side surface of the mounting plate away from the air duct plate; the connecting part comprises a connecting plate, the connecting plate is attached to the side face, away from the air duct plate, of the mounting plate and connected with the motor through a plurality of locking pieces, and a plurality of positioning holes allowing the positioning columns to penetrate through in a one-to-one correspondence mode are formed in the connecting plate; compared with the prior art, it is ensured that the centrifugal fan is stably installed, the installation structure of the centrifugal fan is relatively simple in design, and meanwhile the machining cost is relatively low.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a fan assembly based on a simple centrifugal duct and its air conditioning unit. Background Technology

[0002] Currently, there are cabinet air conditioners on the market that use centrifugal air ducts, with centrifugal fans equipped with volutes installed inside the ducts. For example, CN106403050B discloses an air conditioner cabinet unit, comprising: a housing with an air duct formed therein; two air outlets spaced laterally in the housing, each air outlet communicating with the air duct; at least two centrifugal fans, each fixed to the housing and communicating with the air duct; a heat exchanger fixed to the housing and disposed between the two air outlets and the at least two centrifugal fans; and at least one drive motor that drives the centrifugal fans, each drive motor being fixedly connected to the housing via a mounting bracket, the mounting bracket including a mounting support and at least one mounting arm cooperating with the mounting support, the end of the drive motor engaging within a holding space formed by the mounting support and the mounting arm.

[0003] The centrifugal fan in the aforementioned air conditioner cabinet unit is a centrifugal fan with a volute. The centrifugal fan is fixedly installed in the housing by engaging the end of the drive motor with the mounting bracket and a mounting arm to form a holding space. The mounting bracket includes a first body and multiple mating plates. Each mating plate includes a fixed connection part and a hook. This design makes the installation structure of the centrifugal fan relatively complex and the processing cost relatively high. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fan assembly and its air conditioning unit based on a simple centrifugal duct, so as to solve the problem that the installation structure of the centrifugal fan is relatively complex and the processing cost is high in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fan assembly based on a simple centrifugal duct, which is set in a centrifugal duct formed inside the cabinet casing, including a centrifugal fan without a volute, wherein the air inlet end of the centrifugal fan is installed in the middle of the duct plate formed on the rear side of the centrifugal duct, and a motor is provided at the end of the centrifugal fan away from its air inlet end. The motor is installed in the middle of the mounting plate formed on the front side of the centrifugal duct through a connecting part, and multiple positioning posts are formed on the side of the mounting plate away from the duct plate.

[0006] The connecting part includes a connecting plate, which is attached to the side of the mounting plate away from the air duct plate and is connected to the motor through multiple locking parts. The connecting plate has multiple positioning holes through which multiple positioning pins pass.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] This fan assembly mainly includes a centrifugal fan without a volute. The air inlet end of the centrifugal fan is installed and limited by an air duct plate. At the other end of the centrifugal fan, the motor is first positioned by multiple positioning columns and multiple positioning holes during installation. The connecting plate is attached to the mounting plate to have a large contact area. Then, multiple locking parts are used to connect the motor and the connecting plate to ensure stable installation of the centrifugal fan. The installation structure design of the centrifugal fan is relatively simple, and the processing cost is relatively low. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an air conditioner cabinet unit according to one embodiment of the present invention;

[0010] Figure 2 for Figure 1 A schematic diagram of the internal partial structure;

[0011] Figure 3 for Figure 2 A diagram illustrating the breakdown;

[0012] Figure 4 for Figure 1 Top view;

[0013] Figure 5 for Figure 1 Rear view;

[0014] Figure 6 for Figure 4 Sectional view along line AA;

[0015] Figure 7 for Figure 5 Sectional view along line BB.

[0016] The reference numerals in the accompanying drawings include: centrifugal fan 1, motor 11, connecting part 2, connecting plate 21, positioning column 22, positioning hole 23, mounting plate 3, and evaporator 4. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments:

[0018] like Figures 1-3As shown, this utility model embodiment proposes a fan assembly based on a simplified centrifugal duct, which is set in a centrifugal duct formed inside the cabinet housing. It includes a centrifugal fan 1 without a volute. The air inlet end of the centrifugal fan 1 is installed in the middle of the duct plate formed on the rear side of the centrifugal duct, and the end of the centrifugal fan 1 away from its air inlet end has a motor 11. The motor 11 is installed in the middle of the mounting plate 3 formed on the front side of the centrifugal duct through a connecting part 2. Multiple positioning posts 22 are formed on the side of the mounting plate 3 away from the duct plate. The connecting part 2 includes a connecting plate 21, which is attached to the side of the mounting plate 3 away from the duct plate and connected to the motor 11 through multiple locking parts. Multiple positioning holes 23 are opened on the connecting plate 21 for the multiple positioning posts 22 to pass through one by one.

[0019] In this embodiment, the locking component can be a locking screw. There are four locking screws, four positioning holes 23, and four positioning posts 22. The positioning holes 23 are distributed at the four corners of the connecting plate 21. This fan assembly mainly includes a centrifugal fan 1 without a volute. Some supporting components inside the centrifugal fan 1 have been removed, reflecting the simplicity of the centrifugal air duct. The air duct plate is used to limit the installation of the air inlet end of the centrifugal fan 1. At the same time, the motor 11 on the other end of the centrifugal fan 1 is first positioned by the cooperation of multiple positioning posts 22 and multiple positioning holes 23 during installation. The connecting plate 21 is attached to the mounting plate 3 to have a large contact area. Then, multiple locking screws are used to connect the motor 11 and the connecting plate 21, ensuring stable installation of the centrifugal fan 1. The installation structure design of the centrifugal fan 1 is relatively simple, and the processing cost is relatively low.

[0020] The centrifugal fan 1 is a backward centrifugal fan 1. The backward centrifugal fan 1 is used here mainly to take advantage of its excellent performance in terms of efficiency, energy consumption and noise, so as to meet the usage requirements.

[0021] To better understand this solution, further structural optimization will be performed below.

[0022] First, the angle of the centrifugal fan 1 during installation is optimized. According to another embodiment of this utility model, the fan assembly based on a simple centrifugal duct, wherein the fan shaft of the centrifugal fan 1 is arranged at an angle during installation and the end near the air inlet of the centrifugal fan 1 is the high end.

[0023] This arrangement of the centrifugal fan 1 during installation is because the weight of the centrifugal fan 1 will correct the fan shaft to a horizontal direction, ensuring minimal runout during rotation and guaranteeing the stability and reliability of the centrifugal fan 1 during operation. Specifically, in this embodiment, the angle between the fan shaft and the horizontal plane is 0° to 5° during installation to ensure that it can be corrected to a horizontal direction after installation.

[0024] Secondly, the installation height of centrifugal fan 1 was optimized, such as... Figure 4 and Figure 6 As shown, according to another embodiment of the present invention, a fan assembly based on a simple centrifugal duct is provided, wherein an evaporator 4 is provided on the rear side of the air inlet end of the centrifugal fan 1, the radius of the centrifugal fan 1 is defined as R and the height of the evaporator 4 is defined as H, and the distance between the fan shaft and the bottom of the evaporator 4 is 1 / 2H±1 / 2R. For example, the distance between the fan shaft and the bottom of the evaporator 4 can be 1 / 2H-1 / 2R, 1 / 2H or 1 / 2H+1 / 2R, etc.

[0025] In this embodiment, the installation height of the centrifugal fan 1 is limited to ensure that the upper air outlet of the air conditioner is larger than the lower air outlet, so that the ratio of the air volume of the upper air outlet to the air volume of the lower air outlet of the air conditioner is more reasonable.

[0026] Furthermore, the width of the centrifugal duct along the horizontal direction and passing through the fan shaft is defined as Wfd, and the width of the cabinet air conditioner casing is defined as W, where Wfd is not less than 0.85W and R is not less than 0.4W. Simulation experiments have shown that this limitation allows the cabinet air conditioner to achieve a larger air volume.

[0027] like Figure 5 and Figure 7 As shown, according to another embodiment of the present invention, the fan assembly based on a simple centrifugal duct, wherein the cross-section of the evaporator 4 is arc-shaped and the plane of the end face of the centrifugal fan 1 facing the evaporator 4 does not intersect with the evaporator 4.

[0028] In this embodiment, this limitation is to ensure that the fan is outside the evaporator 4, so that the diameter design of the centrifugal fan 1 is not affected by the evaporator 4.

[0029] In order to make reasonable use of the space enclosed inside the evaporator 4, and to enable the outside air to be transferred to the centrifugal fan 1 more quickly after heat exchange in the evaporator 4, thereby improving the air outlet efficiency of the air conditioning unit, an axial flow fan can be installed in the space enclosed by the evaporator 4, with the air outlet of the axial flow fan facing the air inlet of the centrifugal fan 1; specifically, the axial flow fan is used to accelerate the air flow between the evaporator 4 and the centrifugal fan 1.

[0030] like Figures 1-5 As shown, according to another embodiment of the present invention, the air conditioner cabinet unit includes a fan assembly based on a simple centrifugal duct as described in any of the above embodiments, and has the aforementioned advantages.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fan assembly based on a simplified centrifugal duct, disposed within a centrifugal duct formed inside the cabinet housing, characterized in that, The centrifugal fan includes a centrifugal fan without a volute. The air inlet of the centrifugal fan is installed in the middle of the air duct plate formed on the rear side of the centrifugal air duct, and the end of the centrifugal fan away from its air inlet has a motor. The motor is installed in the middle of the mounting plate formed on the front side of the centrifugal air duct through a connecting part. Multiple positioning posts are formed on the side of the mounting plate away from the air duct plate. The connecting part includes a connecting plate, which is attached to the side of the mounting plate away from the air duct plate and is connected to the motor through multiple locking parts. The connecting plate has multiple positioning holes through which multiple positioning pins pass.

2. The fan assembly based on a simplified centrifugal duct according to claim 1, characterized in that, The centrifugal fan is a backward centrifugal fan.

3. A fan assembly based on a simplified centrifugal duct according to claim 1 or 2, characterized in that, The centrifugal fan shaft is installed at an angle, with the end closest to the centrifugal fan inlet being the high end.

4. A fan assembly based on a simplified centrifugal duct according to claim 3, characterized in that, The angle between the fan shaft and the horizontal plane during installation is 0° to 5°.

5. A fan assembly based on a simplified centrifugal duct according to claim 1 or 2, characterized in that, An evaporator is provided on the rear side of the air inlet of the centrifugal fan. The radius of the centrifugal fan is defined as R and the height of the evaporator is defined as H. The distance between the fan shaft and the bottom of the evaporator is 1 / 2H±1 / 2R.

6. A fan assembly based on a simplified centrifugal duct according to claim 5, characterized in that, The evaporator has an arc-shaped cross-section, and the plane containing the end face of the centrifugal fan facing the evaporator does not intersect with the evaporator.

7. A fan assembly based on a simplified centrifugal duct according to claim 6, characterized in that, An axial flow fan is installed within the space enclosed by the evaporator, with the air outlet of the axial flow fan facing the air inlet of the centrifugal fan.

8. A fan assembly based on a simplified centrifugal duct according to claim 5, characterized in that, The width of the centrifugal duct along the horizontal direction and passing through the fan shaft is defined as W. fd The width of the cabinet casing is defined as W, W fd Not less than 0.85W, R not less than 0.4W.

9. A cabinet air conditioner, characterized in that, Includes a fan assembly based on a simplified centrifugal duct as described in any one of claims 1-8.

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