Integrated cooperative control type multi-machine cooling fan

Abstract

The utility model relates to an integrated cooperative control type multi-machine cooling fan, and aims to solve the problems that a power supply module and a signal conversion circuit are repeatedly configured, the welding and assembling workload is increased, the axial space is occupied, the magnetic circuit design is limited, the electromagnetic conversion efficiency is reduced, the cost is low and the like due to the fact that independent PCBs (Printed Circuit Board) are respectively arranged at middle pipes of existing similar products. And the technical problems that asynchronous signals are easily formed due to independent control of PWM signals of each fan, harmonic superposition is caused by phase difference, and the stability of the system is reduced are solved. The multi-machine cooling fan is characterized in that a PCB (printed circuit board) control panel is arranged on one side of a shell of the multi-machine cooling fan, and wires in a hub of an impeller are directly led out and then are respectively connected into one row or a plurality of rows of corresponding connectors at one end of the PCB control panel; the other end of the PCB control board is provided with a power supply terminal, and a filtering and voltage reduction protection integrated module, an MCU module and FAN modules with the number corresponding to the number of the impellers are sequentially arranged between a connector of the PCB control board and the power supply terminal.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heat dissipation fan, and it is a kind of integrated collaborative control type multi-machine heat dissipation fan. BACKGROUND

[0002] At present, the heat dissipation fan is often insufficient in single air volume, and is integrated into the form of multiple fans in actual application, but the multi-fan heat dissipation fan still adopts the configuration control board of each fan and is closely adjacent to the motor due to industry inertia and material generalization. For example, the authorized announcement number CN216145146U disclosed in Chinese patent literature, the authorized announcement date is March 29, 2022, and the utility model name is "a hot plug server using multiple heat dissipation fans"; but the layout mode in such products occupies axial space, limits magnetic circuit design, reduces electromagnetic conversion efficiency; each fan PWM signal independent control is easy to form asynchronous signal, forms phase difference and causes harmonic superposition, reduces system stability; power module and signal conversion circuit are repeatedly configured, which increases welding and assembly workload. SUMMARY

[0003] To overcome the above shortcomings, the purpose of the utility model is to provide an integrated collaborative control type multi-machine heat dissipation fan to the field, which solves the technical problems that the single PCB circuit board is arranged at the middle pipe of the existing similar products, the power module and the signal conversion circuit are repeatedly configured, the welding and assembly workload is increased, the axial space is occupied, the magnetic circuit design is limited, the electromagnetic conversion efficiency is reduced, and each fan PWM signal independent control is easy to form asynchronous signal, the phase difference is formed, the harmonic superposition is caused, and the system stability is reduced. The purpose is realized through the following technical scheme.

[0004] An integrated collaborative control type multi-machine heat dissipation fan, the shell is provided with impellers of two or more than two fans arranged in a linear shape or multiple rows; the structural design points are that one side of the shell is provided with a PCB control board, and the hub of the impeller is directly connected to the PCB control board at one end of one row or multiple rows of corresponding connectors. Thus, the multiple fan control is integrated into a single PCB control board, and the single PCB circuit board does not need to be arranged at the middle pipe, which is convenient for reducing welding and assembly workload, improving each fan PWM signal independent control to form synchronous signal, and synchronous harmonic superposition, and improving system stability.

[0005] The other end of the PCB control board is provided with a power connection end, and the connector of the PCB control board and the power connection end are sequentially provided with a filter voltage reduction protection integrated module, an MCU module, and a FAN module corresponding to the number of impellers. One FAN module corresponds to the impeller of one fan. The above structural design is convenient for avoiding the repeated configuration of power module and signal conversion circuit.

[0006] The motor shaft length in the hub of the impeller is increased by 16%, and the magnet outside the hub is arranged by Halbach permanent magnet array.

[0007] The hub ratio at the hub of the impeller is reduced by 5%, and the blade length of the outer diameter of the hub is increased by 5.6%.

[0008] The utility model discloses reasonable structure design, production and assembly are convenient, and line welding efficiency is high, and stability is good, reduces the space occupation in the hub, promotes motor shaft length, reduces hub ratio, increases blade length, and it is suitable as integrated collaborative control formula multiple machine cooling fan uses, and the further improvement of similar products. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is the wiring front three-dimensional structure schematic diagram of the embodiment of the utility model.

[0010] Figure 2 It is Figure 1 the wiring rear three-dimensional structure schematic diagram.

[0011] Figure 3 It is Figure 1 the circuit module block diagram at the PCB control board of

[0012] Figure 4 It is Figure 1 the sectional structure schematic diagram, and the A part has been framed in the drawing.

[0013] Figure 5 It is Figure 4 the A part enlarged view, and the B part filling position of the drawing is the increased motor area.

[0014] Drawing serial number and name: 1, shell, 2, impeller, 201, hub, 202, blade, 3, PCB control board, 301, joint, 302, power supply wiring end, 303, filter voltage reduction protection integrated module, 304, MCU module, 305, FAN module. IMPLEMENTATION

[0015] Now, the structure and use of the utility model will be further described in combination with the drawings. Figures 1-5As shown, the plurality of machine cooling fan housing 1 is provided with four impeller 2 in a linear arrangement, the housing is provided with a PCB control board 3, the hub of the impeller is wired directly out and connected to the PCB control board at one end of a row of four corresponding terminals 301. The other end of the PCB control board is provided with a power supply terminal 302, the terminals 301 of the PCB control board and the power supply terminal are sequentially provided with a filter and voltage reduction protection integrated module 303, an MCU module 304, and a number of FAN modules 305 corresponding to the impeller 2, each FAN module corresponds to an impeller of the fan, and is sequentially provided with a FAN1 module, a FAN2 module, a FAN3 module and a FAN4 module. FAN is the meaning of fan module, the main function is to accept control signal and output to each fan signal and direct current.

[0016] Thus, the length of the motor shaft in the hub of the above-mentioned impeller is increased by 16%, and the magnet in the hub 201 is arranged by Halbach permanent magnet array. Halbach refers to Halbach array, which is a magnet structure that aims to generate the strongest magnetic field with the least amount of magnets. The hub ratio of the hub of the impeller is reduced by 5%, and the length of the blade 202 of the outer diameter of the hub is increased by 5.6%.

[0017] In summary, the multi-machine cooling fan relates to a multi-fan cooling system and an axial flux optimization layout method of integrated collaborative control. Based on the original layout problem of multi-fan cooling, the motor space is more optimized, and the performance of multi-fan is improved. Through the following layout optimization integration method: 1) multi-fan collaborative control and module integration, unified control architecture, multi-fan control is integrated into a single PCB control board, and the multi-channel PWM signal is synchronized output by the unified control module, the phase synchronization of each fan signal is realized by phase-locked loop (PLL) technology, and the harmonic interference is reduced. Integrated conversion module management, common high-voltage DC bus power supply, cancel redundant DC-DC conversion voltage and filter module, combined with the above-mentioned integrated control module, the conversion efficiency is improved to 92%. Production benefit, the design of integrated modules reduces the welding amount by one-third, and the assembly time is shortened by 16 / 3. 2) motor axial space optimization and magnetic circuit-power collaborative design, axial flux topology optimization, after removing the redundant control board, the motor shaft length is increased by 16%, the magnetic flux density is increased by 18% through Halbach permanent magnet array layout, low-voltage large-current parallel winding, matching DC-DC output characteristics, adopting multi-parallel winding design, reducing copper loss, the overall peak torque of the motor is increased by 3% to 8%. 3) aerodynamic structure optimization hub ratio optimization, hub ratio reduction by 5%, blade length increase by 5.6%, wind volume increase, fan efficiency improved.

[0018] The above is intended to illustrate the technical means of the present application, and is not intended to limit the technical scope of the present application. Those skilled in the art can make obvious improvements or replacements to the present application in combination with the existing common knowledge, which also falls within the protection scope of the claims of the present application.

Claims

1. An integrated cooperative control multi-machine cooling fan, the shell (1) of the multi-machine cooling fan is provided with impellers (2) of two or more than two fans arranged in a linear or multi-column series; characterized in that One side of the shell is provided with a PCB control panel (3), and the hub of the impeller (2) is connected to the corresponding connector (301) of the PCB control panel.

2. The integrated cooperative control multi-computer cooling fan according to claim 1, wherein The other end of the PCB control panel (3) is provided with a power supply terminal (302), and the connector (301) of the PCB control panel and the power supply terminal are sequentially provided with a filter and voltage reduction protection integrated module (303), an MCU module (304), and a number of FAN modules (305) corresponding to the impeller (2), and each FAN module corresponds to the impeller of a fan.

3. The integrated cooperative control multi-computer cooling fan according to claim 1, wherein The length of the motor shaft in the hub (201) of the impeller (2) is increased by 16%, and the magnet in the hub is arranged by Halbach permanent magnet array.

4. The integrated cooperative control multi-computer cooling fan according to claim 1, wherein The hub ratio at the hub (201) of the impeller (2) is reduced by 5%, and the length of the blade (202) outside the hub is increased by 5.6%.

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