Multi-blade fan, radiator and radiator control method

Abstract

The invention discloses a multi-blade fan which comprises a machine frame, a motor is arranged on the machine frame, the motor is provided with an output shaft capable of rotating, the output shaft is connected with a first blade, and the output shaft is further connected with a second blade capable of rotating relative to the output shaft. A clutch structure used for connecting or disconnecting power transmission between the second fan blade and the output shaft is arranged between the second fan blade and the output shaft, the multi-fan-blade fan is simple in structure and capable of achieving hierarchical control, the invention further provides a radiator, and the radiator adopts the multi-fan-blade fan to achieve the purpose of improving the radiating efficiency. The invention further provides a control system applied to the radiator, and the control system can flexibly adjust strategies according to different working conditions, has good self-adaptive capacity and meets the heat dissipation requirement changes in different use scenes.

Description

Technical Field

[0001] The present invention specifically relates to a multi-blade fan, a radiator and a radiator control method. Background Art

[0002] With the rapid development of the new energy vehicle (NEV) industry, vehicle thermal management systems have become increasingly important. NEVs rely on high-performance battery packs and electric motors for power, and these components generate significant heat during operation. If not effectively managed, excessive temperatures can not only affect battery and electric motor efficiency but can also lead to thermal runaway, shorten service life, and even cause safety issues. Therefore, an efficient heat dissipation system is crucial to ensuring the safety and performance of NEVs. Traditional automotive radiators typically use single-blade electronic fans. With the increasing demand for heat dissipation power, high-power electronic fans are becoming increasingly popular, particularly in the cooling systems of NEVs, due to their high air volume and high static pressure.

[0003] Traditional high-power electronic fans have large blade diameters. When they start running, even at a low speed, they still generate a large air volume, causing the water temperature entering the radiator to drop rapidly. The air volume control accuracy is not high, and the cooling water temperature will fluctuate greatly. The temperature fluctuation will cause the fan to frequently respond to the speed control, resulting in unstable water temperature control, affecting the normal operation of the radiator, and causing noise and other effects, which in turn cause unstable operation of heat-dissipating components such as fuel cells. Therefore, there is an urgent need to provide a fan and a radiator used with it, which can provide the radiator with appropriate air volume at the initial start-up of the fan, and provide a large air volume and static pressure during normal operation to ensure the efficient operation of the radiator; and can fully utilize the space in application to generate a larger air volume and static pressure, improve the control accuracy of the heat dissipation system, and improve the heat dissipation effect of the radiator. However, traditional radiators use a combination of large and small fans, meaning that several cooling fans of different sizes are arranged on the same radiator. This structure occupies a large area on the front of the radiator, failing to meet the compact space requirements of the radiator and resulting in low overall heat dissipation efficiency. Separate air induction designs are required for the large and small fans, and the required spacing between the large and small fans and the radiator is inconsistent, making hood design more difficult. Furthermore, the need for separate control of the large and small fans complicates the control system and results in inaccurate temperature control. This fails to meet the requirements of a compact cooling system with a simple matching design and easy control.

[0004] The present invention is just produced based on above-mentioned deficiency. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a multi-blade fan. The multi-blade fan has a simple structure and can achieve hierarchical control. The present invention also provides a radiator that uses the above-mentioned multi-blade fan to achieve the purpose of improving heat dissipation efficiency.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention provides a multi-blade fan, comprising a frame, a motor provided on the frame, a rotatable output shaft provided on the motor, a first blade connected to the output shaft, a second blade also connected to the output shaft and capable of rotating relative thereto, a clutch structure for connecting or disconnecting power transmission between the second blade and the output shaft.

[0008] As described above, the multi-blade fan, the clutch structure includes a blade mounting plate with magnetic conductivity, an electromagnetic clutch capable of adsorbing the blade mounting plate, the blade mounting plate is rotatably connected to the output shaft, the second blade is connected to the blade mounting plate, the electromagnetic clutch includes a yoke assembly and a baffle assembly, the yoke assembly is connected to the frame or the motor, the baffle assembly is connected to the output shaft so that the former rotates with the latter, the baffle assembly can rotate relative to the yoke assembly, the yoke assembly and the blade mounting plate are respectively located on both sides of the baffle assembly, so that the blade mounting plate can be adsorbed and rest against the baffle assembly when the yoke assembly is working.

[0009] As described above, the multi-blade fan, the electromagnetic clutch also includes a clutch bearing, the clutch bearing is placed between the yoke assembly and the baffle assembly and is coaxial with the output shaft, so that the baffle assembly can rotate relative to the yoke assembly, the output shaft is provided with a mounting plate bearing, the blade mounting plate is connected to the mounting plate bearing, so that the blade mounting plate is rotatably connected to the output shaft.

[0010] The multi-blade fan as described above further includes a control module, which is electrically connected to the motor to control the start and stop and working power of the motor, and the control module is electrically connected to the yoke assembly to control the start and stop of the yoke assembly.

[0011] As described above, the multi-blade fan, the first blade and the second blade are axially arranged on the output shaft, the second blade is located between the first blade and the motor, and the first blade includes a first hub disk for connecting to the output shaft, first blades distributed circumferentially on the first hub disk, and a first air guide ring surrounding the first hub disk and enclosing the first blade; the second blade includes a second hub disk for connecting to the blade mounting plate, second blades distributed circumferentially on the second hub disk, and a second air guide ring surrounding the second hub disk and enclosing the second blade; the diameter of the first hub disk is D1, the diameter of the second hub disk is D2, the diameter of the first air guide ring is D3, and the diameter of the second air guide ring is D4, then D1<D2<D3<D4.

[0012] The present invention also provides a radiator, comprising a radiator housing, on which a plurality of multi-blade fans according to any one of claims 1 to 5 are arranged.

[0013] The present invention also provides a radiator control method, wherein the radiator includes a plurality of multi-blade fans according to any one of claims 1 to 5, and the method is characterized in that the method comprises the following steps:

[0014] S1. Detect the real-time temperature of the radiator, which is recorded as T. The control module is preset or input with a target temperature value in advance, which is recorded as Tm. The control module is preset with a starting temperature value T1;

[0015] S2. When the real-time temperature T≥T1, the control module controls the motor to start, the motor output speed is recorded as N, the preset minimum output speed of the motor single blade is Nmin1, and the preset maximum output speed of the motor single blade is Nmax1;

[0016] S3. When the real-time temperature T>Tm, the control module controls the motor to increase the output speed until the motor output speed N=Nmax1;

[0017] S4. When the motor output speed N=Nmax1 and the real-time temperature T>Tm, the control module controls the electromagnetic clutch to adsorb the fan blade mounting plate so that the motor output shaft is connected to the fan blade mounting plate for transmission.

[0018] In the radiator control method described above, in step S2, when the motor increases its output speed, when the real-time temperature T≤Tm, the motor maintains the current output speed or reduces the output speed until the motor output speed N=Nmin1.

[0019] In the radiator control method described above, the control module is preset with a connection speed preset value N0, a preset minimum output speed value of the motor double blades Nmin2, and a preset maximum output speed value of the motor double blades Nmax2;

[0020] In step S4, when the control module controls the electromagnetic clutch to adsorb the fan blade mounting plate, at the same time, the motor output speed is reduced to the connection speed preset value N0, and then the real-time temperature T is compared with the target temperature value Tm and the following steps are performed according to the comparison structure: when the real-time temperature T>Tm, the motor output speed is increased until the real-time temperature T≤Tm; when the real-time temperature T≤Tm, the motor output speed is reduced until the motor output speed N=Nmax2; when the motor output speed N=Nmax2 and the real-time temperature T>Tm, the control module sends an alarm signal.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The multi-blade fan of the present invention is arranged with more than one type of blades. Blades of different sizes produce different air volumes. By controlling the start and stop of some of the blades, hierarchical control of the air volume is achieved, thereby improving the cooling capacity and efficiency of the heat dissipation system. At the same time, by arranging two blades coaxially, the sizes and profiles of the two blades are controlled, and the occupancy of the front area of ​​the radiator is small, making the product structure more compact while ensuring air output efficiency.

[0023] 2. The multi-blade fan of the present invention provides a clutch structure between the motor output shaft and the large-diameter blades to control the operating state of the two blades under different conditions. The clutch structure uses an electromagnetic clutch to control the start and stop of the large-diameter second blade, making temperature control more precise. The large-diameter second blade and the small-diameter first blade cooperate with each other to adapt to different working conditions, providing the cooling fan with a wider operating range and greater air volume and static pressure performance.

[0024] 3. The radiator control method of the present invention flexibly switches between dual-blade or single-blade operation under different temperature conditions and adjusts the motor output shaft speed in real time. By dynamically adjusting the fan speed to respond to changes in cooling demand, it avoids the increased power consumption caused by using large-sized fan blades when air volume demand is low, thereby saving electricity and improving the energy efficiency of the entire system. The system can accurately maintain the radiator outlet temperature within a set range, ensuring that the cooled equipment always operates within an ideal temperature range, preventing performance degradation or hardware damage caused by overheating. Because the fan does not always run at maximum speed, especially under low load conditions, the noise level can be significantly reduced, providing a quieter operating environment. When the small-diameter fan cannot meet the cooling demand, the system automatically activates the large-diameter fan and issues an alarm in extreme cases, enhancing the reliability and safety of the system. The smooth transition between the large and small fans ensures effective air volume transmission without significant air volume loss or temperature surge, making the overall cooling performance more stable. The control system can flexibly adjust its strategy according to different operating conditions, such as changing cooling demand in different seasons and different usage scenarios, demonstrating good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the principle of the radiator of the present invention;

[0026] Figure 2 is a three-dimensional schematic diagram of a multi-blade fan of the present invention;

[0027] Figure 3 is an exploded schematic diagram of a multi-blade fan of the present invention;

[0028] Figure 4 is a schematic cross-sectional view of a multi-blade fan of the present invention;

[0029] Figure 5 yes Figure 4 A local enlarged view of point A;

[0030] Figure 6 It is a work flow chart of the radiator control method. DETAILED DESCRIPTION

[0031] The invention will be further described below with reference to the accompanying drawings:

[0032] The directions described in the specification of the present invention, such as "up", "down", "left", "right", "front", "back", etc., are based on the directions in the accompanying drawings and are intended to facilitate the description of the relationship between the various components. They do not indicate the unique or absolute positional relationship between the various components. They are only one of the implementation methods of the invention and are not a limitation on its implementation method.

[0033] The present invention provides a multi-blade fan, such as Figure 2 and Figure 3 As shown, it includes a frame 1, the frame 1 is provided with a motor 2, the motor 2 is provided with a rotatable output shaft 21, the output shaft 21 is connected with a first fan blade 3, the output shaft 21 is also connected with a second fan blade 4 that can rotate relative to it, the first fan blade 3 and the second fan blade 4 are axially arranged on the output shaft 21, the first fan blade 3 is set at the end of the output shaft 21, and the first fan blade 3 is rigidly connected to the output shaft, so that the first fan blade 3 rotates with it when the motor is working, and a clutch structure 5 for connecting or disconnecting the power transmission between the second fan blade 4 and the output shaft 21 is provided, and the clutch structure 5 is closed to connect the output shaft 21 with the second fan blade 4, and then the first fan blade 3 and the second fan blade 4 are driven to rotate synchronously at the same time through the output shaft, so as to realize the graded regulation of the air volume.

[0034] like Figure 4 As shown, the clutch structure 5 includes a blade mounting plate 51 connected to the second blade 4 and having magnetic conductivity, and an electromagnetic clutch 52 connected to the output shaft 21 and capable of adsorbing the blade mounting plate 51. The electromagnetic clutch 52 is powered on and off to adsorb or release the blade mounting plate 51, so that the electromagnetic clutch 52 has two states, closed and open, to achieve connection or disconnection between the second blade 4 and the output shaft 21. In detail, as Figure 4 and Figure 5 As shown, the output shaft 21 is provided with a mounting plate bearing 511, and the fan blade mounting plate 51 is connected to the mounting plate bearing 511, so that the fan blade mounting plate 51 is rotatably connected to the output shaft 21. Of course, no bearing is required between the fan blade mounting plate 51 and the output shaft 21. The bearing is provided to reduce friction, but it is not a necessary means. The fan blade mounting plate 51 can be directly sleeved on the output shaft 21 and can rotate relative to the output shaft 21. The second fan blade 4 is connected to the fan blade mounting plate 51, so that the second fan blade 4 can rotate relative to the output shaft 21. The shaft 21 rotates, and the electromagnetic clutch 52 includes a yoke assembly 521, a baffle assembly 522 and a clutch bearing 523. The yoke assembly 521 is connected to the frame 1, and the baffle assembly 522 is connected to the output shaft 21 so that the former rotates with the latter. The clutch bearing 523 is arranged between the yoke assembly 521 and the baffle assembly 522 and is coaxial with the output shaft 21. Of course, no bearing may be provided between the yoke assembly 521 and the baffle assembly 522. The bearing is provided to reduce friction, but it is not a necessary means. Figure 4As shown, the fan blade mounting plate 51 is connected to the output shaft 21 through the mounting plate bearing 51a, and the second fan blade 4 is directly and rigidly connected to the fan blade mounting plate 51, so that the second fan blade 4 can rotate relative to the output shaft 21, and the yoke assembly 521 is connected to the motor 2 or the frame 1, so that the yoke assembly 521 does not rotate with the output shaft 21, while the baffle assembly 522 rotates with the output shaft 21. During operation, when the electromagnetic clutch 52 is energized, the fan blade mounting plate 51 is adsorbed onto the baffle assembly 522, and the two are pressed against each other. After being attracted, the fan blade mounting plate 51 rotates with the baffle assembly 522.

[0035] As a preferred solution, Figure 4 As shown, a control module 6 is also included. The control module 6 is electrically connected to the motor 2 to control the start and stop and the working power of the motor 2. The control module 6 is electrically connected to the yoke assembly 521 to control the start and stop of the yoke assembly 521, thereby being able to control the motor 2 to work or stop under specific conditions, as well as the working power of the motor 2 under different conditions, and control the connection and disconnection of the electromagnetic clutch 52.

[0036] As a preferred solution, Figure 4 As shown, the first fan blade 3 and the second fan blade 4 are axially arranged on the output shaft 21, and the second fan blade 4 is located between the first fan blade 3 and the motor 2, and the first fan blade 3 includes a first hub disk 31 for connecting to the output shaft 21, first blades 32 distributed along the circumference of the first hub disk 31, and a first air guide ring 33 surrounding the first hub disk 31 and surrounding the first blade 32. The second fan blade 4 includes a second hub disk 41 for connecting to the output shaft 21, second blades 42 distributed along the circumference of the second hub disk 41, and a second air guide ring 43 surrounding the second hub disk 41 and surrounding the second blade 42. The diameter of the first hub disk 31 is D1, the diameter of the second hub disk 41 is D2, the diameter of the first air guide ring 33 is D3, and the diameter of the second air guide ring 43 is D4, then D1<D2<D3<D4, which reduces the obstruction to the airflow from a structural perspective and improves the air outlet efficiency.

[0037] like Figure 1 As shown, the multi-blade fan of this structure is mainly used in a radiator, which includes a radiator housing 100, and a plurality of the multi-blade fans are arranged on the radiator housing 100. Of course, the multi-blade fan can also be used in other product equipment besides the radiator.

[0038] The present invention provides a radiator control method for controlling the radiator. Figure 6 As shown, it includes the following steps:

[0039] S1. Detecting the real-time temperature of the radiator. For temperature collection, a temperature sensor is preferably provided at the air outlet of the radiator to collect the real-time temperature. The real-time temperature value is recorded as T. The control module 6 is preset or pre-input with a target temperature value, which is recorded as Tm. The target temperature value is a preset value in the control module 6 or is input by the user through the control panel. The control module 6 is preset with a start temperature value T1. When the real-time temperature of the radiator reaches this value, the fan starts to work.

[0040] S2. When the real-time temperature T≥T1, the control module 6 controls the motor 2 to start, the output speed of the motor 2 is recorded as N, the minimum output speed of the single blade of the motor 2 is preset to Nmin1, and the maximum output speed of the single blade of the motor 2 is preset to Nmax1; in the process of the motor 2 increasing the output speed, when the real-time temperature T≤Tm, the motor 2 maintains the current output speed or reduces the output speed until the output speed of the motor 2 N=Nmin1.

[0041] S3. When the real-time temperature T>Tm, the control module 6 controls the motor 2 to increase the output speed until the output speed N of the motor 2 reaches Nmax1;

[0042] S4. When the output speed of motor 2 is N=Nmax1 and the real-time temperature T>Tm, the control module 6 controls the electromagnetic clutch 52 to adsorb the fan blade mounting plate 51, so that the output shaft 21 of motor 2 is connected to the fan blade mounting plate 51 for transmission; the control module 6 is preset with a connection speed preset value N0, which is the coupling connection value between the measured maximum air volume of the first fan blade and the air volume after the double fan blades are combined. It is obtained through experimental calculation and preset in the system. The purpose is to make the working state more stable when the single fan blade is transitioned to the double fan blade. The preset minimum output speed of the double-blade motor 2 is Nmin2, and the preset maximum output speed of the double-blade motor 2 is Nmax2; when the control module 6 controls the electromagnetic clutch 52 to adsorb the fan blade mounting plate 51, at the same time, the output speed of the motor 2 is reduced to the connection speed preset value N0, and then the real-time temperature T is compared with the target temperature value Tm and the following steps are performed according to the comparison structure: when the real-time temperature T>Tm, the output speed of the motor 2 is increased until the real-time temperature T≤Tm; when the real-time temperature T≤Tm, the output speed of the motor 2 is reduced until the output speed of the motor 2 N=Nmax2; when the output speed of the motor 2 N=Nmax2, and the real-time temperature T>Tm, the control module 6 sends an alarm signal. The alarm signal is an electrical signal sent by the control module 6. The control module 6 can connect a buzzer, an alarm light, a display screen, etc., and then materialize the issued alarm signal to remind the user.

[0043] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A multi-blade fan, characterized in that: The invention comprises a frame (1), wherein the frame (1) is provided with a motor (2), wherein the motor (2) is provided with a rotatable output shaft (21), wherein the output shaft (21) is connected with a first fan blade (3), wherein the output shaft (21) is also connected with a second fan blade (4) which is rotatable relative to the first fan blade (3), and wherein a clutch structure (5) for connecting or disconnecting power transmission between the second fan blade (4) and the output shaft (21) is provided between the second fan blade (4) and the output shaft (21).

2. The multi-blade fan according to claim 1, characterized in that: The clutch structure (5) comprises a fan blade mounting plate (51) having magnetic conductivity and an electromagnetic clutch (52) capable of adsorbing the fan blade mounting plate (51); the fan blade mounting plate (51) is rotatably connected to the output shaft (21); the second fan blade (4) is connected to the fan blade mounting plate (51); the electromagnetic clutch (52) comprises a yoke assembly (521) and a baffle assembly (522); the yoke assembly (521) is connected to the frame (1) or the motor (2); the baffle assembly (522) is connected to the output shaft (21) so that the former rotates with the latter; the baffle assembly (522) can rotate relative to the yoke assembly (521); the yoke assembly (521) and the fan blade mounting plate (51) are respectively located on both sides of the baffle assembly (522) so that the fan blade mounting plate (51) can be adsorbed and pressed against the baffle assembly (522) when the yoke assembly (521) is working.

3. The multi-blade fan according to claim 2, characterized in that: The electromagnetic clutch (52) further includes a clutch bearing (523), wherein the clutch bearing (523) is disposed between the yoke assembly (521) and the baffle assembly (522) and is coaxial with the output shaft (21), so that the baffle assembly (522) can rotate relative to the yoke assembly (521), and a mounting plate bearing (511) is provided on the output shaft (21), and the fan blade mounting plate (51) is connected to the mounting plate bearing (511), so that the fan blade mounting plate (51) is rotatably connected to the output shaft (21).

4. The multi-blade fan according to claim 2, characterized in that: The invention also includes a control module (6), wherein the control module (6) is electrically connected to the motor (2) to control the start and stop and the working power of the motor (2), and the control module (6) is electrically connected to the yoke assembly (521) to control the start and stop of the yoke assembly (521).

5. The multi-blade fan according to claim 1, characterized in that: The first fan blade (3) and the second fan blade (4) are axially arranged on the output shaft (21); the second fan blade (4) is located between the first fan blade (3) and the motor (2); and the first fan blade (3) comprises a first hub disk (31) for connecting to the output shaft (21), first blades (32) distributed along the circumference of the first hub disk (31), and a first air guide ring (33) surrounding the first hub disk (31) and surrounding the first blades (32); and the second fan blade (4) comprises A second hub disk (41) connected to a blade mounting plate (51), second blades (42) distributed along the circumference of the second hub disk (41), and a second air guide ring (43) surrounding the second hub disk (41) and enclosing the second blades (42), wherein the diameter of the first hub disk (31) is D1, the diameter of the second hub disk (41) is D2, the diameter of the first air guide ring (33) is D3, and the diameter of the second air guide ring (43) is D4, and D1<D2<D3<D4.

6. A radiator, characterized in that: The invention comprises a radiator shell (100), on which a plurality of multi-blade fans according to any one of claims 1 to 5 are arranged.

7. A radiator control method, wherein the radiator comprises a plurality of multi-blade fans as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1, detecting the real-time temperature of the radiator, which is recorded as T, the control module (6) is preset or inputted with a target temperature value in advance, which is recorded as Tm, and the control module (6) is preset with a starting temperature value T1; S2, when the real-time temperature T≥T1, the control module (6) controls the motor (2) to start, the output speed of the motor (2) is recorded as N, the minimum output speed of the single fan blade of the motor (2) is preset as Nmin1, and the maximum output speed of the single fan blade of the motor (2) is preset as Nmax1; S3, when the real-time temperature T>Tm, the control module (6) controls the motor (2) to increase the output speed until the output speed N of the motor (2) reaches Nmax1; S4. When the output speed N of the motor (2) is Nmax1 and the real-time temperature T>Tm, the control module (6) controls the electromagnetic clutch (52) to adsorb the fan blade mounting plate (51), so that the output shaft (21) of the motor (2) is connected to the fan blade mounting plate (51) for transmission.

8. The radiator control method according to claim 7, characterized in that: In step S2, during the process of increasing the output speed of the motor (2), when the real-time temperature T≤Tm, the motor (2) maintains the current output speed or reduces the output speed until the output speed of the motor (2) is N=Nmin1.

9. The radiator control method according to claim 7, characterized in that: The control module (6) is preset with a connection speed preset value N0, a preset minimum output speed value of the double-blade motor (2) is Nmin2, and a preset maximum output speed value of the double-blade motor (2) is Nmax2; In step S4, when the control module (6) controls the electromagnetic clutch (52) to adsorb the fan blade mounting plate (51), at the same time, the output speed of the motor (2) is reduced to the connection speed preset value N0, and then the real-time temperature T is compared with the target temperature value Tm and the following steps are performed according to the comparison structure: when the real-time temperature T>Tm, the output speed of the motor (2) is increased until the real-time temperature T≤Tm; when the real-time temperature T≤Tm, the output speed of the motor (2) is reduced until the output speed of the motor (2) N=Nmax2; when the output speed of the motor (2) N=Nmax2 and the real-time temperature T>Tm, the control module (6) sends an alarm signal.

Images