Direct-connection type high-temperature-resistant fan

Abstract

The utility model relates to the technical field of fan equipment, in particular to a direct connection type high-temperature-resistant fan which comprises a fan body, a motor is arranged on the back face of the fan body, an output shaft of the motor is directly connected with the fan body and used for driving the fan body to work, and an airflow control assembly is arranged between the outside of the motor and the fan body. According to the utility model, an impeller at the head of the motor is removed, so that the influence on the power of the motor is reduced, the heat dissipation impeller is utilized to suck air from the tail of the motor, and the air guide cover is utilized to wrap the shell, so that airflow blown out by the heat dissipation impeller can be guided to move along the air guide plate, and the space is saved while the heat dissipation effect is ensured; by arranging the bypass pipe, the negative pressure of the air inlet pipe is utilized to attract airflow in the flow guide cover, and the heat dissipation efficiency can be improved; the three-way valve is used for working, the flow of airflow flowing to the bypass pipe can be controlled, and heat dissipation under various working conditions is met.

Description

Technical Field

[0001] This utility model relates to the field of fan equipment technology, specifically a direct-drive high-temperature resistant fan. Background Technology

[0002] Traditional high-temperature fans typically use couplings or belt drives to isolate the motor from the high-temperature airflow, preventing the motor from operating at high temperatures and affecting its lifespan. However, this method requires sufficient installation space; in situations with limited space, direct-drive fans are necessary.

[0003] Traditional direct-drive high-temperature fans have a small fan blade on the back of the fan, located in the middle of the motor output shaft, to draw in outside air. This, along with a cooling fan at the rear of the motor, helps to cool the motor and output shaft. However, the newly added fan blade draws air from the gap near the fan, which operates at high temperatures, while the surrounding air temperature is also high, resulting in limited cooling effect. In addition, the added fan blade reduces the motor's output power. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a direct-drive high-temperature resistant fan.

[0005] The technical solution of this utility model is:

[0006] A direct-drive high-temperature resistant fan, comprising:

[0007] A fan, wherein a motor is provided on the back of the fan, the output shaft of the motor is directly connected to the fan for driving the fan to work, and an airflow control component is provided between the outside of the motor and the fan;

[0008] A cooling impeller is connected to the end of the motor output shaft, and the cooling impeller is used to blow air towards the head of the motor.

[0009] The airflow control component includes a shroud that covers the surface of the motor to restrict the airflow blown out by the heat dissipation impeller from moving along the surface of the motor. An airflow guiding component is provided at the end of the shroud to guide the airflow away from the shroud and to select the airflow discharge path.

[0010] Preferably, the fan includes a casing, a first impeller is rotatably mounted inside the casing, and the motor output shaft passes through the casing and is connected to the first impeller, driving the first impeller to rotate when the motor is working.

[0011] Preferably, the machine body has an air intake pipe on the front and an exhaust pipe on the side. When the first impeller rotates, the airflow enters through the air intake pipe and exits through the exhaust pipe. A bypass pipe is provided below the middle of the air intake pipe, and the airflow guiding component is connected to the bypass pipe.

[0012] Preferably, the motor includes a housing, the surface of which is axially provided with a plurality of air guide plates, and the rear end of the housing is provided with a protective cover, which covers a heat dissipation impeller, and a gap is left between the inner side of the air guide cover and the top surface of the air guide plate.

[0013] Preferably, the air guide shroud is provided with a plurality of clearance grooves extending rearward from the middle, the clearance grooves being used to avoid structural components whose housing surface is higher than the air guide plate.

[0014] Preferably, the airflow guiding component includes an air collecting hood, which is fixedly installed at the head of the air guide hood, and a three-way valve is provided at the bottom of the air collecting hood, which is used to control the gas flow direction.

[0015] Preferably, one outlet of the three-way valve is connected to a second exhaust duct, which bypasses the machine body and connects to a bypass duct, while the other outlet of the three-way valve is directly connected to the atmosphere.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention eliminates the impeller at the motor head, reducing its impact on motor power. It utilizes a cooling impeller to draw air from the motor tail, and a guide shroud surrounds the casing, guiding the airflow from the cooling impeller along the guide plate, ensuring effective heat dissipation while saving space. By incorporating a bypass pipe and utilizing the negative pressure of the intake pipe to draw airflow from the guide shroud, heat dissipation efficiency is improved. The use of a three-way valve controls the airflow to the bypass pipe, meeting heat dissipation requirements under various operating conditions. Attached Figure Description

[0018] Figure 1 This is a first schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second structure of this utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the fan structure in this utility model;

[0021] Figure 4 This is an exploded view of the structure of the motor and airflow control components in this utility model;

[0022] Figure 5 This is a schematic cross-sectional view of the three-way valve structure in this utility model.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Fan; 11. Support frame; 12. Body; 13. First impeller; 14. Inlet pipe; 15. Exhaust pipe; 16. Bypass pipe;

[0025] 2. Motor; 21. Housing; 22. Air guide plate; 23. Cooling impeller; 24. Protective cover;

[0026] 3. Airflow control components; 31. Draft shield; 32. Clearance groove; 33. Insert plate; 34. Air collection shield; 35. T-pipe; 36. Flip plate; 37. Servo motor; 38. Second exhaust duct. Detailed Implementation

[0027] 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.

[0028] Example 1:

[0029] Please see Figure 1-5 The present invention will describe the above technical solution in detail through the following embodiments:

[0030] A direct-drive high-temperature resistant fan, comprising:

[0031] Fan 1, with motor 2 on the back of fan 1. The output shaft of motor 2 is directly connected to fan 1 to drive fan 1. An airflow control component 3 is provided between the outside of motor 2 and fan 1.

[0032] The fan 1 includes a body 12, and a first impeller 13 is rotatably mounted inside the body 12. The output shaft of the motor 2 passes through the body 12 and is connected to the first impeller 13. When the motor 2 is working, it drives the first impeller 13 to rotate.

[0033] A support frame 11 is provided below the body 12, which is used to support the body 12 and the motor 2.

[0034] The first impeller 13 is a centrifugal impeller with front air intake and side air exhaust.

[0035] The front of the fuselage 12 is provided with an air intake pipe 14 and the side is provided with an exhaust pipe 15. When the first impeller 13 rotates, the airflow enters through the air intake pipe 14 and exits through the exhaust pipe 15. A bypass pipe 16 is welded to the lower middle part of the air intake pipe 14.

[0036] When the first impeller 13 is working, the front side is a negative pressure zone. At this time, the intake pipe 14 is in a negative pressure state, which allows gas to be drawn in from the intake pipe 14. The bypass pipe 16 is connected to the intake pipe 14, so the bypass pipe 16 is also in a negative pressure state.

[0037] A cooling impeller 23 is connected to the end of the output shaft of motor 2. The cooling impeller 23 is used to blow air towards the head of motor 2.

[0038] The cooling impeller 23 is far away from the fan 1, so the air temperature it draws in is lower, which is suitable for cooling the motor 2.

[0039] The motor 2 includes a housing 21, with a plurality of air guide plates 22 axially arranged on the surface of the housing 21, and a protective cover 24 at the tail end of the housing 21, which covers the heat dissipation impeller 23.

[0040] The protective cover 24 can prevent damage to the heat dissipation impeller 23 and also guide the airflow direction, so that the airflow generated by the heat dissipation impeller 23 when it is working flows towards the casing 21 and flows along the air guide plate 22 in the initial stage to achieve heat dissipation.

[0041] The air guide plate 22 is used to increase the contact area between the casing 21 and the airflow, thereby improving heat dissipation efficiency.

[0042] The airflow control component 3 includes a shroud 31, which covers the surface of the motor 2 to limit the movement of the airflow blown out by the heat dissipation impeller 23 along the surface of the motor 2. An airflow guiding component is provided at the end of the shroud 31 to guide the airflow away from the shroud 31 and to select the airflow discharge path.

[0043] The end of the fairing 31 is fixedly connected to the back of the fuselage 12 by screws.

[0044] A gap is left between the inner side of the air guide 31 and the top surface of the air guide plate 22.

[0045] The airflow guiding component is connected to the bypass pipe 16.

[0046] The bypass pipe 16 can draw air out of the shroud 31 through the airflow guiding component, providing additional suction, increasing airflow rate and velocity, thereby improving heat dissipation efficiency.

[0047] The air guide shroud 31 has several clearance grooves 32 extending backward from the middle. The clearance grooves 32 are used to avoid structural components whose surface of the housing 21 is higher than the air guide plate 22.

[0048] The clearance groove 32 allows the fairing 31 to fit as closely as possible to the housing 21.

[0049] The tail end of the fairing 31 is provided with an insert plate 33. The thickness of the insert plate 33 is smaller than that of the fairing 31. The insert plate 33 is used to insert into the protective cover 24 and is fixedly connected to the protective cover 24 and the housing 21 by screws.

[0050] The airflow guiding assembly includes an air collecting hood 34, which is fixedly installed at the head of the air guide hood 31. A three-way valve is provided at the bottom of the air collecting hood 34, which is used to control the gas flow direction.

[0051] The air collector shroud 34 is fixedly installed on the back of the body 12 with screws, and is also fixedly connected to the end of the air guide shroud 31 with screws.

[0052] The air collector shroud 34 is used to guide the airflow downwards.

[0053] One outlet of the three-way valve is connected to a second exhaust duct 38, which bypasses the body 12 and connects to a bypass duct 16. The other outlet of the three-way valve is directly connected to the atmosphere.

[0054] The three-way valve includes a three-way pipe 35. The middle pipe of the three-way pipe 35 is fixedly connected to the bottom of the air collector hood 34 by screws. The pipe on the left side of the three-way pipe 35 is fixedly connected to the second exhaust pipe 38 by screws. The pipe on the right side of the three-way pipe 35 is connected to the outside atmosphere.

[0055] A flap 36 is rotatably installed at the junction of the three pipes of the tee pipe 35. One end of the flap 36 is connected to a servo motor 37, which is fixedly installed on the side of the tee pipe 35.

[0056] When the servo motor 37 is working, it can drive the flap 36 to rotate within a range of ±45°.

[0057] By controlling the rotation angle of the flap 36, the airflow pressure can be distributed.

[0058] When the flap 36 is rotated counterclockwise to the 45° angled position, the right side of the three-way pipe 35 is closed, and the airflow in the air collecting hood 34 completely enters the second row of air pipes 38, and then enters the bypass pipe 16. Since the bypass pipe 16 is filled with negative pressure, the airflow speed and flow rate in the guide hood 31 are at their maximum at this time.

[0059] When the flap 36 is rotated clockwise to a 45-degree angle, the left side of the three-way pipe 35 is closed, and the airflow in the air collector shroud 34 is completely discharged from the right side of the three-way pipe 35. At this time, heat dissipation relies entirely on the airflow generated by the heat dissipation impeller 23.

[0060] As the flap 36 rotates from a left-tilted state to a right-tilted state, the negative pressure of the bypass pipe 16 gradually reduces its influence on the airflow inside the guide shroud 31.

[0061] It should be noted that for some special gases that cannot tolerate the mixing of external air, the flap 36 needs to be rotated clockwise to a 45-degree angle to prevent air from entering the bypass pipe 16 from the second exhaust pipe 38.

[0062] For applications requiring high airflow quality, an air purification component, such as a known filter screen or filter cloth, can be added between the second exhaust duct 38 and the bypass duct 16.

[0063] Working principle:

[0064] When motor 2 is working, the output shaft simultaneously drives the first impeller 13 and the heat dissipation impeller 23 to rotate.

[0065] The first impeller 13 rotates, creating a negative pressure zone at the intake pipe 14, drawing gas in from the intake pipe 14 and then discharging it from the exhaust pipe 15, while creating a negative pressure at the bypass pipe 16.

[0066] The rotating heat dissipation impeller 23 can draw in external cold air from the tail end of the motor 2 and then drive the airflow to flow towards the head of the motor 2.

[0067] The airflow generated by the heat dissipation impeller 23 is constrained by the guide shroud 31 and flows along the air guide plate 22, carrying away the heat generated by the motor 2 when it is working.

[0068] The airflow converges at the air collection hood 34, and then flows downward to the three-way pipe 35.

[0069] By using the servo motor 37 to drive the flap 36 to rotate, the influence of the negative pressure of the bypass pipe 16 on the airflow inside the guide shield 31 can be controlled.

[0070] For gases that can accept the mixing of external air, the negative pressure of the bypass pipe 16 can be used to increase the speed and flow rate of the airflow inside the shroud 31, thereby improving heat dissipation efficiency.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A direct-drive high-temperature resistant fan, characterized in that, include: A fan (1) is provided with a motor (2) on the back of the fan (1). The output shaft of the motor (2) is directly connected to the fan (1) to drive the fan (1) to work. An airflow control component (3) is provided between the outside of the motor (2) and the fan (1). The output shaft is connected to a heat dissipation impeller (23) at the end, which is used to blow air towards the head of the motor (2); The airflow control component (3) includes a shroud (31) which covers the surface of the motor (2) to restrict the airflow blown out by the heat dissipation impeller (23) from moving along the surface of the motor (2). The end of the shroud (31) is provided with an airflow guiding component to guide the airflow away from the shroud (31) and to select the airflow discharge path.

2. The direct-drive high-temperature resistant fan as described in claim 1, characterized in that: The fan (1) includes a body (12), and a first impeller (13) is rotatably installed inside the body (12). The output shaft of the motor (2) passes through the body (12) and is connected to the first impeller (13). When the motor (2) is working, it drives the first impeller (13) to rotate.

3. A direct-drive high-temperature resistant fan as described in claim 2, characterized in that: The machine body (12) has an air inlet pipe (14) on the front and an exhaust pipe (15) on the side. When the first impeller (13) rotates, the airflow enters from the air inlet pipe (14) and exits from the exhaust pipe (15). A bypass pipe (16) is provided below the middle of the air inlet pipe (14), and the airflow guiding component is connected to the bypass pipe (16).

4. The direct-drive high-temperature resistant fan as described in claim 1, characterized in that: The motor (2) includes a housing (21), and a plurality of air guide plates (22) are axially arranged on the surface of the housing (21). A protective cover (24) is provided at the tail end of the housing (21). The protective cover (24) wraps around the heat dissipation impeller (23). A gap is left between the inner side of the air guide cover (31) and the top surface of the air guide plate (22).

5. A direct-drive high-temperature resistant fan as described in claim 4, characterized in that: The air guide shroud (31) has several clearance grooves (32) extending backward from the middle. The clearance grooves (32) are used to avoid structural components whose surface of the housing (21) is higher than that of the air guide plate (22).

6. A direct-drive high-temperature resistant fan as described in claim 3, characterized in that: The airflow guiding component includes an air collecting hood (34), which is fixedly installed at the head of the air guide hood (31). A three-way valve is provided at the bottom of the air collecting hood (34), and the three-way valve is used to control the gas flow direction.

7. A direct-drive high-temperature resistant fan as described in claim 6, characterized in that: One outlet of the three-way valve is connected to a second exhaust pipe (38), which bypasses the body (12) and connects to a bypass pipe (16). The other outlet of the three-way valve is directly connected to the atmosphere.

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