Efficient energy-saving cooling fan for agricultural machinery air conditioner

Abstract

The utility model discloses a high-efficiency energy-saving cooling fan for an air conditioner of agricultural machinery, which relates to the field of air conditioners for agricultural machinery, aims to solve the problem that sundries are accumulated between an impeller and a motor in the prior art to influence the normal operation of the fan, and adopts the technical scheme that the high-efficiency energy-saving cooling fan comprises a direct current motor, an outer frame and the impeller, the outer frame is connected with a direct-current motor through screws, the output end of the direct-current motor is connected with an impeller through nuts, and the impeller is provided with a mounting hole matched with the output end of the direct-current motor. The impeller comprises a shaft disc and fan blades, the fan blades are arranged on the side wall of the shaft disc, a notch for discharging sundries is further formed in the side wall of the shaft disc, and a notch is formed in the shaft disc of the impeller, so that the sundries invading the inner side of the impeller of the fan are discharged from the notch along with airflow under the action of centrifugal force, and the sundries cannot be continuously accumulated on the inner side of the impeller; the problems that the cooling fan is difficult to start, current is increased and stalling occurs are solved, and the working efficiency of the whole air conditioning system is higher.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology for agricultural machinery, specifically a high-efficiency and energy-saving cooling fan for air conditioning of agricultural machinery. Background Technology

[0002] In agricultural machinery, existing air conditioning cooling fans are often exposed to complex environments containing high levels of dust, crop debris, and straw during operation. Because the inlet protection structure of existing cooling fans uses an open grid or large-pitch condenser design without an active impurity removal mechanism, small particles continuously intrude into the bottom inner side of the fan impeller and the gap between the impeller and the DC motor. If these particles cannot be discharged in time, they accumulate and agglomerate, causing problems such as difficulty in starting the cooling fan, increased current, and in severe cases, blockage, affecting heat dissipation and ultimately leading to decreased air conditioning efficiency or even failure. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-efficiency and energy-saving cooling fan for air conditioning of agricultural machinery, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model discloses a high-efficiency and energy-saving cooling fan for agricultural machinery air conditioning. The technical solution adopted includes a DC motor, an outer frame, and an impeller. The outer frame is connected to the DC motor by screws, and the output end of the DC motor is connected to the impeller by a nut. The impeller has a mounting hole that matches the output end of the DC motor.

[0005] The impeller includes a shaft disk and fan blades. The shaft disk is a cylindrical shell with one side open, and the open end of the shaft disk corresponds to the position of the outer frame. The fan blades are provided on the side wall of the shaft disk, and a notch for discharging debris is also provided on the side wall of the shaft disk. The notch is located between adjacent fan blades. By creating a notch on the shaft disk of the impeller, debris that has entered the inside of the fan impeller is discharged from the notch under the action of centrifugal force with the airflow. The debris cannot accumulate continuously inside the impeller, avoiding problems such as difficulty in starting the cooling fan, increased current, and stalling, thus making the entire air conditioning system more efficient.

[0006] As a preferred embodiment of this utility model, the fan blades are provided in seven groups, arranged in a circular array around the shaft disk, and the fan blades are forward-curved blades with an inclination angle range of 15°-42°.

[0007] As a preferred embodiment of this utility model, the notch is an inverted triangle, with the short side of the notch forming a 90° angle with the bottom of the shaft disk, and the long side of the notch forming a 140° obtuse angle with the bottom of the shaft disk.

[0008] As a preferred technical solution of this utility model, the junction of the two sides of the notch is transitioned by an arc with a radius of 5mm, and the arc area of ​​the notch is lower than the inner bottom of the shaft disk.

[0009] As a preferred technical solution of this utility model, the inner side of the shaft disk is also provided with reinforcing ribs, and three sets of reinforcing ribs are provided at the root of each set of fan blades. The height of the three sets of reinforcing ribs gradually increases along the rotation direction of the impeller. The reinforcing ribs are provided at the connection between the shaft disk and the fan to increase the structural strength of the impeller. At the same time, the reinforcing ribs with height differences prevent debris from accumulating continuously on the inner side of the impeller under the action of high-speed airflow.

[0010] Compared with the prior art, the beneficial effects of this utility model are: by opening a notch on the impeller shaft, the debris that has entered the inside of the fan impeller is discharged from the notch under the action of centrifugal force along with the airflow. The debris cannot accumulate continuously inside the impeller, avoiding problems such as difficulty in starting the cooling fan, increased current, and stalling, thus making the entire air conditioning system more efficient.

[0011] This invention increases the structural strength of the impeller by setting reinforcing ribs at the connection between the shaft and the fan. At the same time, the presence of reinforcing ribs with height differences prevents debris from accumulating continuously inside the impeller under the action of high-speed airflow. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;

[0013] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;

[0014] Figure 3 This is an exploded view of the present invention;

[0015] Figure 4 This is a schematic diagram of the impeller structure of this utility model. Figure 1 ;

[0016] Figure 5 This is a schematic diagram of the impeller structure of this utility model. Figure 2 .

[0017] In the diagram: 1. Screw; 2. DC motor; 3. Outer frame; 4. Impeller; 5. Nut;

[0018] 41. Shaft disc; 42. Fan blade; 43. Mounting hole; 44. Notch; 45. Reinforcing rib. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0020] like Figures 1 to 5 As shown, this utility model discloses a high-efficiency and energy-saving cooling fan for agricultural machinery air conditioning. The technical solution adopted is that the impeller 4 and the outer frame 3 adopt an injection molding structure, the DC motor 2 is fixed to the outer frame 3 with screws 1, and the impeller 4 is fixed to the DC motor 2 with nuts 5.

[0021] The impeller 4 has seven blades 42. The blades 42 are forward-curved and tilted at an angle of 30°. A triangular notch 44 is left between the roots of every two adjacent blades 42. The short side of the notch 44 forms a 90° angle with the bottom of the impeller 4, and the long side of the notch 44 forms a 140° obtuse angle with the bottom of the impeller 4. At the same time, the bottom of the junction of the two sides of the notch 44 is transitioned by a large arc with a radius of 5mm to reduce stress concentration. This arc area is also lower than the bottom of the inner side of the impeller 4.

[0022] Each fan blade 42 has three triangular reinforcing ribs 45 at its inner root, distributed along the rotation direction of the impeller 4, with the height gradually increasing.

[0023] When the fan is working, the debris that has entered the inside of the fan impeller 4 will be discharged from the inverted triangular notch 44 at the root of the two sets of fan blades 42 on the impeller 4 due to centrifugal force. However, the debris on both sides of the reinforcing rib 45 cannot accumulate inside the impeller 4 due to the height difference.

[0024] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0025] Components not described in detail in this article are existing technologies.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency and energy-saving cooling fan for air conditioning in agricultural machinery, characterized in that: It includes a DC motor (2), an outer frame (3) and an impeller (4). The outer frame (3) is connected to the DC motor (2) by screws (1). The output end of the DC motor (2) is connected to the impeller (4) by nuts (5). The impeller (4) has mounting holes (43) that are compatible with the output end of the DC motor (2). The impeller (4) includes a shaft disk (41) and fan blades (42). The shaft disk (41) is a cylindrical shell with one side open, and the open end of the shaft disk (41) corresponds to the position of the outer frame (3). The fan blades (42) are provided on the side wall of the shaft disk (41). A notch (44) for discharging debris is also provided on the side wall of the shaft disk (41), and the notch (44) is located between adjacent fan blades (42). The inner side of the shaft disk (41) is also provided with reinforcing ribs (45), and each set of fan blades (42) has three sets of reinforcing ribs (45) at the root. The height of the three sets of reinforcing ribs (45) gradually increases along the rotation direction of the impeller (4).

2. The high-efficiency energy-saving cooling fan for agricultural machinery air conditioning according to claim 1, characterized in that: The fan blades (42) are provided in seven groups, arranged in a ring array around the shaft disk (41). The fan blades (42) are forward-curved blades, and the tilt angle of the blades ranges from 15° to 42°.

3. The high-efficiency energy-saving cooling fan for agricultural machinery air conditioning according to claim 1, characterized in that: The notch (44) is an inverted triangle. The short side of the notch (44) forms a 90° angle with the bottom of the shaft disk (41), and the long side of the notch (44) forms a 140° obtuse angle with the bottom of the shaft disk (41).

4. The high-efficiency energy-saving cooling fan for agricultural machinery air conditioning according to claim 3, characterized in that: At the junction of the two sides of the notch (44), a circular arc with a radius of 5mm is used for transition, and the circular arc area of ​​the notch (44) is lower than the inner bottom of the shaft disk (41).

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