Refrigeration axial flow fan

Abstract

The invention belongs to the technical field of axial flow fans, and particularly relates to a refrigeration axial flow fan which comprises a fan body and a linkage air inlet mechanism. The linkage air inlet mechanism is arranged in the air inlet pipe and used for triggering the air inlet guide plate to do reciprocating motion in a linkage mode in the rotary ventilation process of the air inlet fan so that more air can be discharged into the refrigeration mechanism, and during work, the linear moving arm drives the air inlet guide plate to do reciprocating motion through the fixing frame; more air is sucked into the air inlet pipe through dynamic adjustment of the air inlet guide plate, so that the refrigeration mechanism can absorb heat in airflow more sufficiently, the heat exchange efficiency is remarkably improved, the problem that the efficiency of a traditional fixed air inlet structure is low due to the fact that airflow is limited is solved, the heat exchange efficiency of the refrigeration mechanism is improved, and the service life of the refrigeration mechanism is prolonged. And energy waste caused by uneven airflow is reduced, and the overall performance of the device is further improved.

Description

Technical Field

[0001] This invention belongs to the field of axial flow fan technology, specifically a refrigeration axial flow fan. Background Technology

[0002] In industrial production, controlling ambient temperature and air circulation is crucial for ensuring normal equipment operation, improving comfort, and guaranteeing production safety. Axial flow fans are widely used in forced ventilation, air exchange, and heat dissipation applications due to their advantages such as simple structure, large air volume, high efficiency, and low cost. Their working principle involves a motor driving an impeller to rotate, causing air to flow axially, thereby achieving the delivery of large volumes of gas.

[0003] A search revealed that Chinese Patent CN219639091U discloses an all-stainless steel axial flow fan for refrigeration, comprising a fan casing, motor, impeller, and support frame. The fan is an axial flow fan, and the fan casing, motor, impeller, and support frame are all made of stainless steel. The hub is made of stainless steel sheet through a spinning process, with an arc-shaped outer edge to increase fan efficiency. The blades are made of cast stainless steel with optimized airfoil shapes and are welded to the stainless steel hub. The hub and bushing are also connected by welding. The motor is an all-stainless steel motor, suitable for extreme working environments such as high temperature, high humidity, and high water / steam conditions. The standard motor's protection rating reaches IP67, meeting the food-grade requirements of the refrigeration industry. The fan speed is 1450 r / min, and the vibration at the rated operating point is less than 4.6 mm / s. All fan materials are stainless steel, meeting environmental protection and food-grade requirements. The fan casing, motor, impeller, and support frame are connected by fasteners for easy disassembly and maintenance.

[0004] However, the aforementioned axial flow fan adopts a fixed air inlet structure, with a fixed air inlet area that cannot be dynamically adjusted. When a large air volume is required, it cannot meet the requirements, and the refrigeration mechanism cannot obtain enough airflow for heat exchange, resulting in a decrease in the heat absorption efficiency of the refrigerant in the heat exchange copper tube. Summary of the Invention

[0005] The purpose of this invention is to provide a refrigeration axial flow fan to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a refrigeration axial flow fan, comprising: The fan body has an air inlet pipe fixedly connected to its front side and an air outlet pipe fixedly connected to its rear side. A refrigeration mechanism is installed inside the fan body. The refrigeration mechanism is used to absorb heat from the airflow and reduce the air temperature. The refrigeration mechanism includes a guide frame, a guide fan, heat sinks, heat exchange copper tubes, a heat exchanger, and a return pipe. Specifically, when the refrigeration mechanism is working, the guide fan rotates inside the guide frame, drawing in outside air and guiding it to the heat sink area. After the refrigerant is compressed into a high-temperature and high-pressure state in the heat exchanger, it flows into the heat exchange copper tube through the return pipe. In the heat exchange copper tube, the refrigerant rapidly expands and evaporates, absorbing a large amount of heat. This heat comes from the outside air flowing through the heat sink, thus significantly reducing the air temperature. The refrigerant, after absorbing heat, is in a low-pressure and low-temperature state and returns to the heat exchanger through the return pipe, where it is recompressed and enters the next refrigeration cycle. This method draws in outside air evenly and guides it to the heat sink area. When the air flows through the heat sink, it comes into contact with the outer wall of the heat exchange copper tube, and the heat is absorbed by the refrigerant, reducing the air temperature and forming cold air. The cold air continues to be pushed along the axial direction, achieving simultaneous ventilation and refrigeration.

[0007] The linked air intake mechanism is located inside the air intake duct. The linked air intake mechanism is used to trigger the air intake guide plate to reciprocate during the rotation of the air intake fan to allow more air to be discharged into the refrigeration mechanism. The linked air intake mechanism includes a motor, an air intake fan, a bevel transmission gear, a bevel driven gear, a transmission rod, a transmission disc, an eccentric swing arm, a limiting groove, a limiting rod, a linear moving arm, a fixed frame, a fixed plate, a bearing, and an air intake guide plate.

[0008] Specifically, during operation, the motor output drives the intake fan to rotate, causing the conical transmission gear on the front side of the intake fan to rotate accordingly. This conical transmission gear meshes with the conical driven gears on both sides, transmitting the rotational motion to the transmission rod. The transmission rod then drives the transmission disc to rotate, causing the eccentric swing arm connected to the outer side of the transmission disc to swing. The limiting groove at the lower end of the eccentric swing arm, in conjunction with the limiting rod, converts the swing into the reciprocating motion of a linear moving arm. The linear moving arm, through a fixed frame, drives the intake guide plate to reciprocate. The dynamic adjustment of the intake guide plate allows more air to be drawn into the intake pipe, enabling the refrigeration mechanism to more fully absorb heat from the airflow, thereby significantly improving heat exchange efficiency. This avoids the inefficiency problem caused by limited airflow in traditional fixed intake structures. It not only improves the heat exchange efficiency of the refrigeration mechanism but also reduces energy waste caused by uneven airflow, further enhancing the overall performance of the invention. Preferably, the motor is located inside the air inlet pipe, and the output end of the motor is connected to the air intake fan. A conical transmission gear is fixedly connected to the front side of the air intake fan, and conical driven gears are meshed on both sides of the conical transmission gear. A transmission rod is fixedly connected to the side of each of the two conical driven gears away from the conical transmission gear. The other end of the transmission rod is fixedly connected to the inner side of the transmission disc. The transmission disc is rotatably connected to the outer side of the fixed plate, and the fixed plate is fixedly connected to the fan body.

[0009] Preferably, an eccentric swing arm is rotatably connected to the outer side of the transmission disk. A limit groove is provided at the lower end of the eccentric swing arm. A limit rod is provided inside the limit groove. The limit rod is fixedly connected to the outer side of the linear moving arm. Bearings are provided on the upper and lower sides of both the front and rear ends of the linear moving arm. Each bearing is rotatably connected to the outer side of the fixed plate.

[0010] Preferably, a fixed frame is fixedly connected to the upper front end of the linear moving arm, and an air inlet guide plate is fixedly connected to the inner side of the fixed frame. The air inlet guide plate is disposed on the front side of the air inlet pipe.

[0011] Preferably, the heat exchanger is located above the fan body, and both the cold medium interface and the hot medium interface of the heat exchanger are connected to a return pipe. The end of the return pipe away from the heat exchanger is connected to a heat exchange copper tube, which is installed inside multiple stacked heat sinks.

[0012] Preferably, a flow guide frame is provided on the front side of the heat sink, and a flow guide fan is provided inside the flow guide frame.

[0013] Preferably, the air outlet duct is provided with an air volume adjustment mechanism, which includes a hand crank, an arc-shaped indicator plate, an indicator cylinder, a rotating shaft, a baffle plate, an angle indicator and an arc-shaped groove. The hand crank is rotatably connected to the upper surface of the air outlet duct, and the air outlet duct is provided with a rotating shaft inside, which is connected to the hand crank in a transmission manner.

[0014] Specifically, rotating the hand crank drives the arc-shaped indicator disc to rotate. The arc-shaped indicator disc has an arc-shaped groove inside, and the indicator cylinder is fixed to the upper surface of the air outlet duct and embedded in the arc-shaped groove. This limits the rotation range of the arc-shaped indicator disc and keeps its movement trajectory stable. An angle indicator is set on the outer surface of the arc-shaped indicator disc. By observing the scale of the angle indicator, the current angle position of the air volume adjustment can be known in real time, thereby achieving precise adjustment. When the hand crank rotates, the rotating shaft rotates accordingly. A circular baffle is fixedly connected to the outer surface of the rotating shaft. The baffle rotates synchronously with the rotating shaft. The rotation angle of the baffle determines the degree of opening and closing of the ventilation channel inside the air outlet duct, thereby realizing the adjustment of the air volume. When the baffle is parallel to the axis of the air outlet duct, the air volume is the maximum; when the baffle is perpendicular to the axis, the air volume is the minimum or completely closed, thus allowing for flexible adjustment of the air volume according to actual needs.

[0015] Preferably, the front side of the hand crank arm is provided with an arc-shaped indicator plate, the inside of the arc-shaped indicator plate is provided with an arc-shaped groove, the inside of the arc-shaped groove is provided with an indicator cylinder, and the lower end of the indicator cylinder is fixedly connected to the upper surface of the air outlet pipe.

[0016] Preferably, the outer surface of the arc-shaped indicator disk is provided with an angle indicator.

[0017] Preferably, a wind baffle is fixedly connected to the outer surface of the rotating shaft, and the wind baffle is circular in shape.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention is equipped with a linkage air intake mechanism. During operation, the output end of the motor drives the intake fan to rotate, and the conical transmission gear on the front side of the intake fan rotates accordingly. The conical transmission gear meshes with the conical driven gears on both sides, transmitting the rotational motion to the transmission rod. The transmission rod drives the transmission disc to rotate, and the eccentric swing arm connected to the outer side of the transmission disc swings accordingly. The limiting groove at the lower end of the eccentric swing arm cooperates with the limiting rod to convert the swing into the reciprocating motion of the linear moving arm. The linear moving arm drives the air intake guide plate to reciprocate through the fixed frame. The dynamic adjustment of the air intake guide plate allows more air to be drawn into the air intake pipe, enabling the refrigeration mechanism to absorb heat from the airflow more fully, thereby significantly improving the heat exchange efficiency. This avoids the problem of low efficiency caused by airflow limitation in traditional fixed air intake structures. It not only improves the heat exchange efficiency of the refrigeration mechanism but also reduces energy waste caused by uneven airflow, further improving the overall performance of this invention. 2. This invention is equipped with a refrigeration mechanism. When the refrigeration mechanism is working, the guide fan rotates inside the guide frame, drawing in external air and guiding it to the heat sink area. When the refrigerant is compressed into a high-temperature and high-pressure state in the heat exchanger, it flows into the heat exchange copper tube through the return pipe. In the heat exchange copper tube, the refrigerant rapidly expands and evaporates, absorbing a large amount of heat. This heat comes from the external air flowing through the heat sink, thus significantly reducing the air temperature. The refrigerant, after absorbing heat, is in a low-pressure and low-temperature state and returns to the heat exchanger through the return pipe, where it is recompressed and enters the next refrigeration cycle. This method draws in external air evenly and guides it to the heat sink area. When the air flows through the heat sink, it comes into contact with the outer wall of the heat exchange copper tube, and the heat is absorbed by the refrigerant, reducing the air temperature and forming cold air. The cold air continues to be pushed along the axial direction, achieving simultaneous ventilation and refrigeration. 3. This invention is equipped with an airflow adjustment mechanism. Rotating the hand crank arm drives the arc-shaped indicator disc to rotate. The arc-shaped indicator disc has an arc-shaped groove inside, and the indicator cylinder is fixed to the upper surface of the air outlet duct and embedded in the arc-shaped groove. This limits the rotation range of the arc-shaped indicator disc and maintains its stable trajectory. An angle indicator is provided on the outer surface of the arc-shaped indicator disc, allowing for real-time observation of the current airflow adjustment angle, thus achieving precise adjustment. When the hand crank arm rotates, the rotating shaft rotates accordingly. A circular baffle plate is fixedly connected to the outer surface of the rotating shaft. The baffle plate rotates synchronously with the rotating shaft, and its rotation angle determines the opening and closing degree of the ventilation channel inside the air outlet duct, thereby allowing for adjustment of the airflow. When the baffle plate is parallel to the axis of the air outlet duct, the airflow is at its maximum; when the baffle plate is perpendicular to the axis, the airflow is at its minimum or completely stopped, thus allowing for flexible adjustment of the airflow according to actual needs. Attached Figure Description

[0019] Figure 1 This is a front-view stereoscopic structural diagram of the present invention; Figure 2 This is a rear-view stereoscopic structural diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a top view of the internal structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the present invention from the main view. Figure 6 This is a schematic diagram of the linkage air intake mechanism of the present invention; Figure 7 This is a schematic diagram of the air volume regulating mechanism of the present invention; Figure 8 This is a schematic diagram of the refrigeration mechanism of the present invention; In the diagram: 1. Fan body; 2. Inlet duct; 3. Outlet duct; 4. Refrigeration mechanism; 401. Flow guide; 402. Flow guide fan; 403. Heat sink; 404. Heat exchange copper tube; 405. Heat exchanger; 406. Return duct; 5. Linked air intake mechanism; 501. Motor; 502. Inlet fan; 503. Conical transmission gear; 504. Conical driven gear; 505. Transmission rod; 506. Transmission... 507. Disc; 508. Eccentric swing arm; 509. Limiting groove; 510. Limiting rod; 511. Linear moving arm; 512. Fixing frame; 513. Fixing plate; 514. Bearing; 515. Air inlet guide plate; 6. Air volume adjustment mechanism; 601. Hand crank arm; 602. Arc-shaped indicator disc; 603. Indicator cylinder; 604. Rotating shaft; 605. Wind baffle; 606. Angle indicator; 607. Arc-shaped groove. Detailed Implementation

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Please see Figures 1-8 The present invention provides two technical solutions, specifically including the following embodiments: Example 1 A refrigeration axial flow fan includes: a fan body 1, with an air inlet pipe 2 fixedly connected to the front side of the fan body 1 and an air outlet pipe 3 fixedly connected to the rear side of the fan body 1; it also includes a linkage air inlet mechanism 5, which is disposed inside the air inlet pipe 2. The linkage air inlet mechanism 5 is used to trigger the air inlet guide plate 514 to reciprocate during the rotation of the air inlet fan 502 to discharge more air into the refrigeration mechanism 4; the linkage air inlet mechanism 5 includes a motor 501, an air inlet fan 502, a conical transmission gear 503, a conical driven gear 504, a transmission rod 505, a transmission disc 506, an eccentric swing arm 507, a limiting groove 508, a limiting rod 509, and a linear displacement arm. The fan assembly includes a boom 510, a fixed frame 511, a fixed plate 512, a bearing 513, and an air inlet guide plate 514. A motor 501 is housed inside the air inlet pipe 2. The output end of the motor 501 is connected to an air intake fan 502. A bevel gear 503 is fixedly connected to the front of the air intake fan 502. Both sides of the bevel gear 503 are meshed with bevel driven gears 504. A transmission rod 505 is fixedly connected to the side of each bevel driven gear 504 away from the bevel gear 503. The other end of the transmission rod 505 is fixedly connected to the inner side of a transmission disc 506. The transmission disc 506 is rotatably connected to the outer side of the fixed plate 512. The fixed plate 512 is fixedly connected to the fan body 1. An eccentric swing arm 507 is rotatably connected to the outer side of the transmission disc 506. A limit groove 508 is formed at the lower end of the eccentric swing arm 507, and a limit rod 509 is installed inside the limit groove 508. The limit rod 509 is fixedly connected to the outer side of the linear moving arm 510. Bearings 513 are provided on the upper and lower sides of both the front and rear ends of the linear moving arm 510. Each bearing 513 is rotatably connected to the outer side of the fixed plate 512. The bearings 513 are used to reduce the frictional resistance of the linear moving arm 510 during its back-and-forth swing and prevent jamming. A fixed frame 511 is fixedly connected to the upper front end of the linear moving arm 510. An air inlet guide plate 514 is fixedly connected to the inner side of the fixed frame 511. The air inlet guide plate 514 is positioned... On the front side of the air inlet duct 2, the eccentric swing arm 507 connected to the outer side of the transmission disc 506 rotates with the transmission disc 506. Its lower end makes a circular motion with the eccentricity as the radius. Since the upper end of the eccentric swing arm 507 is rotatably connected to the transmission disc 506, and the lower end is slidably engaged with the limiting rod 509 through the limiting groove 508, the actual motion trajectory is a restricted swing. When the eccentric swing arm 507 swings, the linear moving arm 510 is driven to move back and forth along the axial direction through the sliding engagement of the limiting groove 508 and the limiting rod 509. Experiments show that the dynamic adjustment structure increases the air intake volume by 30% to 50% compared with the fixed structure, accelerates the heat load response speed of the heat exchanger 405, and increases the system COP by 15% to 20%.

[0022] During operation, the output of motor 501 drives the intake fan 502 to rotate, causing the conical transmission gear 503 on the front side of the intake fan 502 to rotate accordingly. The conical transmission gear 503 meshes with the conical driven gears 504 on both sides, transmitting the rotational motion to the transmission rod 505. The transmission rod 505 drives the transmission disc 506 to rotate, causing the eccentric swing arm 507 connected to the outer side of the transmission disc 506 to swing accordingly. The limiting groove 508 at the lower end of the eccentric swing arm 507 cooperates with the limiting rod 509 to convert the swing into the forward movement of the linear moving arm 510. In the reciprocating motion, the linear moving arm 510 drives the air inlet guide plate 514 to reciprocate through the fixed frame 511. The dynamic adjustment of the air inlet guide plate 514 allows more air to be drawn into the air inlet pipe 2, enabling the refrigeration mechanism 4 to more fully absorb the heat in the airflow, thereby significantly improving the heat exchange efficiency. This avoids the inefficiency problem caused by airflow limitation in traditional fixed air inlet structures. It not only improves the heat exchange efficiency of the refrigeration mechanism 4, but also reduces energy waste caused by uneven airflow, further improving the overall performance of the invention.

[0023] Example 2 Based on Embodiment 1, a refrigeration mechanism 4 is also included. The refrigeration mechanism 4 is disposed inside the fan body 1 and is used to absorb heat from the airflow and reduce the air temperature. The refrigeration mechanism 4 includes a guide frame 401, a guide fan 402, heat sinks 403, a heat exchange copper tube 404, a heat exchanger 405, and a return pipe 406. The heat exchanger 405 is disposed above the fan body 1. Both the cold medium interface and the hot medium interface of the heat exchanger 405 are connected to the return pipe 406. The end of the return pipe 406 away from the heat exchanger 405 is connected to the heat exchange copper tube 404. The heat exchange copper tube 404 passes through the interior of multiple stacked heat sinks 403. A guide frame 401 is disposed on the front side of the heat sinks 403. A guide fan 402 is disposed inside the guide frame 401. When the refrigeration mechanism 4 is working, the guide fan 402 is positioned within the guide frame 401. The internal rotation draws in external air and guides it to the heat sink 403 area. When the refrigerant is compressed to a high temperature and high pressure state in the heat exchanger 405, it flows into the heat exchange copper tube 404 through the return pipe 406. In the heat exchange copper tube 404, the refrigerant expands rapidly and evaporates, absorbing a large amount of heat. This heat comes from the external air flowing through the heat sink 403, thus significantly reducing the air temperature. The refrigerant, after absorbing heat, is in a low pressure and low temperature state and returns to the heat exchanger 405 through the return pipe 406, where it is recompressed and enters the next refrigeration cycle. This method draws in external air evenly and guides it to the heat sink 403 area. When the air flows through the heat sink 403, it comes into contact with the outer wall of the heat exchange copper tube 404, and the heat is absorbed by the refrigerant, reducing the air temperature and forming cold air. The cold air continues to be pushed along the axial direction, achieving simultaneous ventilation and cooling. Preferably, the air outlet duct 3 is internally equipped with an airflow regulating mechanism 6. The airflow regulating mechanism 6 includes a hand crank 601, an arc-shaped indicator 602, an indicator cylinder 603, a rotating shaft 604, a baffle plate 605, an angle indicator 606, and an arc-shaped groove 607. The hand crank 601 is rotatably connected to the upper surface of the air outlet duct 3. The rotating shaft 604 is internally equipped with the air outlet duct 3 and is drively connected to the hand crank 601. The front side of the hand crank 601 is provided with an arc-shaped indicator. The arc-shaped indicator 602 has an arc-shaped groove 607 inside, and an indicator cylinder 603 is installed inside the arc-shaped groove 607. The lower end of the indicator cylinder 603 is fixedly connected to the upper surface of the air outlet duct 3. An angle indicator 606 is installed on the outer surface of the arc-shaped indicator 602. A wind baffle 605 is fixedly connected to the outer surface of the rotating shaft 604. The wind baffle 605 is circular in shape. Rotating the hand crank 601 drives the arc-shaped indicator 602 to rotate. The inside of the indicator 602 is provided with an arc-shaped groove 607. The indicator cylinder 603 is fixed to the upper surface of the air outlet duct 3 and embedded in the arc-shaped groove 607. This is used to limit the rotation range of the arc-shaped indicator 602 and keep its movement trajectory stable. An angle indicator 606 is provided on the outer surface of the arc-shaped indicator 602. By observing the scale of the angle indicator 606, the current angle position of the air volume adjustment can be known in real time, thereby achieving precise adjustment. When the hand crank 601 rotates, the rotating shaft 604 rotates accordingly. A circular baffle 605 is fixedly connected to the outer surface of the rotating shaft 604. The baffle 605 rotates synchronously with the rotating shaft 604. The rotation angle of the baffle 605 determines the opening and closing degree of the ventilation channel inside the air outlet duct 3, thereby realizing the adjustment of the air volume. When the baffle 605 is parallel to the axis of the air outlet duct 3, the air volume is the maximum. When the baffle 605 is perpendicular to the axis, the air volume is the minimum or completely closed, so that the air volume can be flexibly adjusted according to actual needs.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the application should be included within the protection scope of the present invention.

Claims

1. A refrigeration axial flow fan, characterized in that, include: The fan body (1) has an air inlet pipe (2) fixedly connected to the front side of the fan body (1) and an air outlet pipe (3) fixedly connected to the rear side of the fan body (1). The refrigeration mechanism (4) is located inside the fan body (1). The refrigeration mechanism (4) is used to absorb heat in the airflow and reduce the air temperature. The refrigeration mechanism (4) includes a guide frame (401), a guide fan (402), a heat sink (403), a heat exchange copper tube (404), a heat exchanger (405), and a return pipe (406). The linkage air intake mechanism (5) is located inside the air intake pipe (2). The linkage air intake mechanism (5) is used to trigger the air intake guide plate (514) to reciprocate during the rotation and ventilation of the air intake fan (502) so that more air is discharged into the refrigeration mechanism (4). The linkage air intake mechanism (5) includes a motor (501), an air intake fan (502), a bevel transmission gear (503), a bevel driven gear (504), a transmission rod (505), a transmission disc (506), an eccentric swing arm (507), a limiting groove (508), a limiting rod (509), a linear moving arm (510), a fixed frame (511), a fixed plate (512), a bearing (513), and an air intake guide plate (514).

2. A refrigeration axial flow fan according to claim 1, characterized in that, The motor (501) is installed inside the air inlet pipe (2). The output end of the motor (501) is connected to the air inlet fan (502). A bevel transmission gear (503) is fixedly connected to the front side of the air inlet fan (502). Both sides of the bevel transmission gear (503) are meshed with bevel driven gears (504). The two bevel driven gears (504) are fixedly connected to the side away from the bevel transmission gear (503) with a transmission rod (505). The other end of the transmission rod (505) is fixedly connected to the inner side of the transmission disc (506). The transmission disc (506) is rotatably connected to the outer side of the fixed plate (512). The fixed plate (512) is fixedly connected to the fan body (1).

3. A refrigeration axial flow fan according to claim 2, characterized in that, An eccentric swing arm (507) is rotatably connected to the outer side of the transmission disc (506). A limit groove (508) is provided at the lower end of the eccentric swing arm (507). A limit rod (509) is provided inside the limit groove (508). The limit rod (509) is fixedly connected to the outer side of the linear moving arm (510). Bearings (513) are provided on the upper and lower sides of both ends of the linear moving arm (510). Each bearing (513) is rotatably connected to the outer side of the fixed plate (512).

4. A refrigeration axial flow fan according to claim 3, characterized in that, The upper front end of the linear moving arm (510) is fixedly connected to a fixed frame (511), and the inner side of the fixed frame (511) is fixedly connected to an air inlet guide plate (514), which is located on the front side of the air inlet pipe (2).

5. A refrigeration axial flow fan according to claim 1, characterized in that, The heat exchanger (405) is located above the fan body (1). The cold medium interface and the hot medium interface of the heat exchanger (405) are both connected to a return pipe (406). The end of the return pipe (406) away from the heat exchanger (405) is connected to a heat exchange copper tube (404). The heat exchange copper tube (404) is installed inside multiple stacked heat sinks (403).

6. A refrigeration axial flow fan according to claim 5, characterized in that, A flow guide (401) is provided on the front side of the heat sink (403), and a flow guide fan (402) is provided inside the flow guide (401).

7. A refrigeration axial flow fan according to claim 1, characterized in that, The air outlet pipe (3) is provided with an air volume adjustment mechanism (6). The air volume adjustment mechanism (6) includes a hand crank (601), an arc-shaped indicator plate (602), an indicator cylinder (603), a rotating shaft (604), a wind baffle (605), an angle indicator (606), and an arc-shaped groove (607). The hand crank (601) is rotatably connected to the upper surface of the air outlet pipe (3). The air outlet pipe (3) is provided with a rotating shaft (604) inside. The rotating shaft (604) is connected to the hand crank (601) in a transmission connection.

8. A refrigeration axial flow fan according to claim 7, characterized in that, The front side of the hand crank (601) is provided with an arc-shaped indicator plate (602), and an arc-shaped groove (607) is provided inside the arc-shaped indicator plate (602). An indicator cylinder (603) is provided inside the arc-shaped groove (607), and the lower end of the indicator cylinder (603) is fixedly connected to the upper surface of the air outlet pipe (3).

9. A refrigeration axial flow fan according to claim 7, characterized in that, An angle indicator (606) is provided on the outer surface of the arc-shaped indicator disk (602).

10. A refrigeration axial flow fan according to claim 7, characterized in that, A wind deflector (605) is fixedly connected to the outer surface of the rotating shaft (604), and the wind deflector (605) is circular in shape.

Images