Fan switching control device and switch

Abstract

The fan switching control device comprises a switching module and a trigger module, the switching module comprises a first connecting end, a second connecting end and a third connecting end, the second connecting end is connected with a redundant fan, the third connecting end is connected with a power supply, and the trigger module is connected with the redundant fan. The switching module is used for controlling the second connecting end to be communicated with the third connecting end according to a trigger signal of the first connecting end so as to drive the redundant fan to operate; the trigger module comprises a trigger input end and a trigger output end, the trigger input end is connected with the main fan to receive an alarm signal output when the main fan stops rotating, the trigger output end is connected with the first connecting end, and the trigger module is used for outputting a trigger signal to the first connecting end through the trigger output end according to the alarm signal. According to the fan switching control device, when the main fan stops rotating, the redundant fan can be automatically started in time, and the heat dissipation problem that the temperature of an equipment terminal is too high due to the fact that the fan stops rotating is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fan switching control, in particular to a fan switching control device and a switch. Background Art

[0002] Nowadays, there are many high-power switches on the market, and most of them require powerful heat dissipation to maintain the normal operation of the machine. Fan heat dissipation is the most common heat dissipation method. The higher the power of the switch, the higher the heat dissipation capacity required of the fan. However, the existing widely used hydraulic fans and ball fans are affected by the manufacturing process and the ambient temperature of the machine, and both have service life issues. If the cooling fan of a high-power switch breaks down during use, it will inevitably cause the switch to overheat and fail to work normally. In severe cases, it may cause damage to the switch or even worse. Utility Model Content

[0003] The purpose of the utility model is to provide a fan switching control device, which can automatically start the redundant fan in time when the main fan stops, avoiding the heat dissipation problem of excessive temperature caused by fan stoppage in the equipment terminal, and effectively improving the service life of the equipment terminal.

[0004] Another object of the present invention is to provide a switch that can automatically start a redundant fan in time when the main fan stops, thereby avoiding the heat dissipation problem of excessive temperature caused by fan stoppage in the device terminal and effectively improving the service life of the device terminal.

[0005] In order to achieve the above object, the utility model discloses a fan switching control device, which includes:

[0006] a switching module, the switching module comprising a first connection end, a second connection end, and a third connection end, the second connection end being connected to the redundant fan, the third connection end being connected to the power supply, the switching module being configured to control the connection between the second connection end and the third connection end according to a trigger signal from the first connection end, so as to drive the redundant fan to operate;

[0007] A trigger module, the trigger module includes a trigger input end and a trigger output end, the trigger input end is connected to the main fan to receive an alarm signal output when the main fan stops, the trigger output end is connected to the first connection end, and the trigger module is used to output a trigger signal to the first connection end through the trigger output end according to the alarm signal.

[0008] Optionally, the fan switching control device also includes an alarm module, which includes a fourth connection end and a fifth connection end, the fourth connection end is connected to the main fan to receive an alarm signal output when the main fan stops, and the fifth connection end is connected to the input end of the equipment terminal, and the alarm module is used to output a main fan stop signal to the fifth connection end according to the alarm signal.

[0009] Optionally, the alarm module includes a diode, a first resistor, a second resistor and a first transistor, the input end of the diode is connected to the first power supply and the main fan, the output end of the diode is connected to the first end of the first resistor and the second resistor, the second end of the second resistor is grounded, the second end of the first resistor is connected to the gate of the first transistor, the drain of the first transistor is connected to the second power supply and the input end of the equipment terminal, and the source of the first transistor is grounded.

[0010] Optionally, the switching module includes a magnetic controller and a connection switch, the connection switch is provided with an active pin, a first fixed pin and a second fixed pin, the magnetic controller is connected to the trigger output end, the active pin is connected to the redundant fan, the first fixed pin is connected to the first power supply, and the second fixed pin is grounded. When the main fan stops, the magnetic controller is used to control the active pin to disconnect from the second fixed pin and connect to the first fixed pin to connect the redundant fan to the first power supply.

[0011] Optionally, the trigger module includes a third resistor, a fourth resistor and a second transistor, the first end of the third resistor is connected to the main fan, the second end of the third resistor is connected to the first end of the fourth resistor and the gate of the second transistor, the drain of the second transistor is connected to the second power supply, the second power supply is connected to the first connection end, and the second end of the fourth resistor and the source of the second transistor are grounded.

[0012] In order to achieve the above-mentioned other object, the present invention discloses a switch, which includes: a switch body, and a main fan, a redundant fan and the above-mentioned fan switching control device arranged on the switch body.

[0013] The utility model is provided with a trigger module and a switching module to realize the switching of fans. The trigger module is provided with a trigger input end connected to the main fan and a trigger output end connected to the first connection end of the switching module. After the trigger module receives the alarm signal output when the main fan stops, it will output a trigger signal to the first connection end. The second connection end of the switching module is connected to the redundant fan, and the third connection end is connected to the power supply. After receiving the input trigger signal, the switching module will control the second connection end and the third connection end to be connected, so that the power supply is connected to the redundant fan and the redundant fan is driven to operate, thereby realizing that when the main fan stops, the redundant fan is started in time and automatically, avoiding the heat dissipation problem of excessive temperature caused by fan stoppage in the equipment terminal, and effectively improving the service life of the equipment terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic block diagram of a fan switching control device according to an embodiment of the present invention.

[0015] Figure 2 This is a circuit structure diagram of the switching module, triggering module, first socket and second socket in the fan switching control device according to an embodiment of the present invention.

[0016] Figure 3 This is a circuit structure diagram of the alarm module in the fan switching control device according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0017] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0018] See also Figures 1 to 3 The utility model discloses a fan switching control device, which includes:

[0019] The switching module 1 includes a first connection terminal 11, a second connection terminal 12, and a third connection terminal 13. The second connection terminal 12 is connected to the redundant fan 100, and the third connection terminal 13 is connected to the power supply 101. The switching module 1 is configured to control the connection between the second connection terminal 12 and the third connection terminal 13 according to a trigger signal from the first connection terminal 11 to drive the redundant fan 100 to operate.

[0020] Trigger module 2, trigger module 2 includes a trigger input terminal 21 and a trigger output terminal 22, the trigger input terminal 21 is connected to the main fan 102 to receive the alarm signal output when the main fan 102 stops, the trigger output terminal 22 is connected to the first connection terminal 11, and the trigger module 2 is used to output a trigger signal to the first connection terminal 11 through the trigger output terminal 22 according to the alarm signal.

[0021] The present invention is provided with a trigger module 2 and a switching module 1 to realize the switching of fans. The trigger module 2 is provided with a trigger input terminal 21 connected to the main fan 102 and a trigger output terminal 22 connected to the first connection terminal 11 of the switching module 1. After the trigger module 2 receives the alarm signal output when the main fan 102 stops, it will output a trigger signal to the first connection terminal 11. The second connection terminal 12 of the switching module 1 is connected to the redundant fan 100, and the third connection terminal 13 is connected to the power supply 101. After receiving the input trigger signal, the switching module 1 will control the second connection terminal 12 and the third connection terminal 13 to be connected, so that the power supply 101 is connected to the redundant fan 100 and drives the redundant fan 100 to operate, thereby realizing that when the main fan 102 stops, the redundant fan 100 is automatically started in time, avoiding the heat dissipation problem of excessive temperature caused by fan stoppage of the device terminal, and effectively improving the service life of the device terminal.

[0022] Specifically, in this embodiment, the device terminal is a switch, the main fan 102 has an alarm output and is connected to the trigger input terminal 21 through the first socket J1, and the redundant fan 100 is connected to the second connection terminal 12 through the second socket J2. When the main fan 102 is working normally to dissipate heat for the normally operating switch, it outputs a low-level alarm signal through the third pin of the first socket J1. When the main fan 102 stops, it outputs a high-level alarm signal to trigger the trigger module 2 and the alarm module 3 to work, but is not limited to this.

[0023] Specifically, the power supply 101 connected to the fan switching control device includes a first power supply VDD12 and a second power supply VDD33 to provide different required voltages for each module in the fan switching control device. In this embodiment, the third connection terminal 13 is connected to the first power supply VDD12.

[0024] See Figures 1 to 3 The fan switching control device also includes an alarm module 3, which includes a fourth connection terminal 31 and a fifth connection terminal 32. The fourth connection terminal 31 is connected to the main fan 102 to receive an alarm signal output when the main fan 102 stops rotating. The fifth connection terminal 32 is connected to the input terminal of the equipment terminal. The alarm module 3 is used to output a main fan 102 stop signal to the fifth connection terminal 32 according to the alarm signal, so that the setting terminal can promptly detect the main fan 102 stop rotating and give maintenance personnel sufficient time to avoid other safety problems caused by failure to promptly detect the main fan 102 stop rotating.

[0025] Furthermore, the alarm module 3 includes a diode D2, a first resistor R5, a second resistor R6 and a first transistor Q2, the input end of the diode D2 is connected to the first power supply VDD12 and the main fan 102, the output end of the diode D2 is connected to the first end of the first resistor R5 and the second resistor R6, the second end of the second resistor R6 is grounded, the second end of the first resistor R5 is connected to the gate of the first transistor Q2, the drain of the first transistor Q2 is connected to the second power supply VDD33 and the input end of the equipment terminal, and the source of the first transistor Q2 is grounded.

[0026] Specifically, in this embodiment, the first resistor R5 is a current limiting resistor, the second resistor R6 is a pull-down resistor, the first transistor Q2 is an NMOS transistor, and the input end of the device terminal is the GPIO interface of the switch, but is not limited thereto; the high-level alarm signal output when the main fan 102 stops rotating passes through the diode D2 and the first resistor R5 in sequence, and gives a high-level signal to the gate of the first transistor Q2; the main fan 102 is connected to the 12V first power supply VDD12, and the level of the alarm signal output is equal to the input voltage of the main fan 102, so the high-level signal of the alarm signal input is 12V, and the 12V driving voltage input to the gate of the first transistor Q2 can turn on the first transistor Q2; since the GPIO port of the switch is connected to the second power supply VDD33, its default level is high, and after the first transistor Q2 is turned on, it will pull the level of the GPIO port low, so that the switch can know that the main fan 102 has stopped and output a corresponding notification message; when the main fan 102 is running normally, it will output a low-level alarm signal. The setting of the second resistor R6 can keep the gate voltage of the first transistor Q2 at a low level to ensure that the first transistor Q2 is not turned on.

[0027] See Figures 1 to 3 The trigger module 2 includes a third resistor R1, a fourth resistor R2 and a second transistor Q1, a first end of the third resistor R1 is connected to the main fan 102, a second end of the third resistor R1 is connected to the first end of the fourth resistor R2 and the gate of the second transistor Q1, a drain of the second transistor Q1 is connected to the second power supply VDD33, the second power supply VDD33 is connected to the first connection end 11, and a second end of the fourth resistor R2 and a source of the second transistor Q1 are grounded.

[0028] Specifically, in this embodiment, the third resistor R1 is a current limiting resistor, the fourth resistor R2 is a pull-down resistor, and the second transistor Q1 is an NMOS transistor, but is not limited thereto. The high-level alarm signal output when the main fan 102 stops rotating is not only input to the alarm module 3, but also synchronously input to the trigger module 2, which gives a high-level signal to the gate of the second transistor Q1 through the third resistor R1 to drive the second transistor Q1 to turn on; the relay LS1 in the switching module 1 selects a relay with a 3.3V driving voltage. The relay selection selects the voltage of the relay driven by the larger the voltage, and the drain of the second transistor Q1 is connected to the larger voltage. Therefore, the drain of the second transistor Q1 is The first and eighth pins of the relay LS1 are connected to the 3.3V second power supply VDD33 to form a path; after the second transistor Q1 is turned on, the 3.3V second power supply VDD33 inputs a 3.3V voltage to the first connection terminal 11 of the switching module 1, thereby causing the magnetic controller 14 of the relay LS1 to generate a magnetic attraction force, thereby connecting the redundant fan 100 to the first power supply VDD12; and when the main fan 102 is operating normally, it will output a low-level alarm signal. The setting of the fourth resistor R2 can keep the gate voltage of the second transistor Q1 at a low level to ensure that the second transistor Q1 is not turned on, but is not limited to this.

[0029] See Figures 1 to 3 The switching module 1 includes a magnetic controller 14 and a connection switch 15. The connection switch 15 is provided with an active pin 151, a first fixed pin 152, and a second fixed pin 153. The magnetic controller 14 is connected to the trigger output terminal 22, the active pin 151 is connected to the redundant fan 100, the first fixed pin 152 is connected to the first power supply VDD12, and the second fixed pin 153 is grounded. When the main fan 102 stops, the magnetic controller 14 is used to control the active pin 151 to disconnect from the second fixed pin 153 and connect to the first fixed pin 152, so that the redundant fan 100 is connected to the first power supply VDD12.

[0030] The redundant fan 100 is automatically enabled through the safe and reliable trigger module 2 and the switching module 1, thereby preventing major safety problems and improving the service life of the switch.

[0031] Specifically, in this embodiment, the magnetic controller 14 and the connection switch 15 are relays LS1, the third pin and the sixth pin of the relay LS1 are connected to the power supply pin of the redundant fan 100 and form an active pin 151, the fourth pin and the fifth pin of the relay LS1 are connected to the first power supply VDD12 and form a first fixed pin 152, the second pin and the seventh pin of the relay LS1 are connected to the switch ground GND and form a second fixed pin 153, but the present invention is not limited thereto; when the main fan 102 stops and outputs an alarm signal, the second transistor Q1 is turned on, and after the first pin and the eighth pin of the relay LS1 are energized, The magnetic controller 14 generates a magnetic attraction force, causing the third and sixth pins of the relay LS1 to be attracted to the fourth and fifth pins of the relay LS1, respectively. The first power supply VDD12 is connected to the redundant fan 100 through the attracted pins, and the redundant fan 100 starts to be powered on to dissipate heat from the switch. When the main fan 102 is not stopped and no alarm signal is output, the magnetic controller 14 does not generate a magnetic attraction force. The third and sixth pins of the relay LS1 are in contact with the second and seventh pins of the relay LS1, respectively, by default. The redundant fan 100 is connected to the switch ground through the pins and does not operate due to the lack of voltage input.

[0032] See also Figures 1 to 3 The present invention discloses a switch, which includes: a switch body, a main fan 102, a redundant fan 100 and the aforementioned fan switching control device arranged on the switch body.

[0033] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A fan switching control device, characterized in that: include: a switching module, the switching module comprising a first connection end, a second connection end, and a third connection end, the second connection end being connected to the redundant fan, the third connection end being connected to the power supply, the switching module being configured to control the connection between the second connection end and the third connection end according to a trigger signal from the first connection end, so as to drive the redundant fan to operate; A trigger module, the trigger module includes a trigger input end and a trigger output end, the trigger input end is connected to the main fan to receive an alarm signal output when the main fan stops, the trigger output end is connected to the first connection end, and the trigger module is used to output a trigger signal to the first connection end through the trigger output end according to the alarm signal.

2. The fan switching control device according to claim 1, characterized in that: It also includes an alarm module, which includes a fourth connection end and a fifth connection end. The fourth connection end is connected to the main fan to receive an alarm signal output when the main fan stops, and the fifth connection end is connected to the input end of the device terminal. The alarm module is used to output a main fan stop signal to the fifth connection end according to the alarm signal.

3. The fan switching control device according to claim 2, characterized in that: The alarm module includes a diode, a first resistor, a second resistor and a first transistor, the input end of the diode is connected to the first power supply and the main fan, the output end of the diode is connected to the first end of the first resistor and the second resistor, the second end of the second resistor is grounded, the second end of the first resistor is connected to the gate of the first transistor, the drain of the first transistor is connected to the second power supply and the input end of the equipment terminal, and the source of the first transistor is grounded.

4. The fan switching control device according to claim 1, wherein: The switching module includes a magnetic controller and a connection switch, and the connection switch is provided with an active pin, a first fixed pin and a second fixed pin. The magnetic controller is connected to the trigger output end, the active pin is connected to the redundant fan, the first fixed pin is connected to the first power supply, and the second fixed pin is grounded. When the main fan stops, the magnetic controller is used to control the active pin to disconnect from the second fixed pin and connect to the first fixed pin to connect the redundant fan to the first power supply.

5. The fan switching control device according to claim 1, wherein: The trigger module includes a third resistor, a fourth resistor and a second transistor, the first end of the third resistor is connected to the main fan, the second end of the third resistor is connected to the first end of the fourth resistor and the gate of the second transistor, the drain of the second transistor is connected to the second power supply, the second power supply is connected to the first connection end, and the second end of the fourth resistor and the source of the second transistor are grounded.

6. A switch, characterized in that: include: A switch body, a main fan and a redundant fan arranged on the switch body, and a fan switching control device according to any one of claims 1 to 5.

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