Wireless network equipment timing restart circuit with heat dissipation and overheating protection functions

Abstract

The utility model discloses a wireless network equipment timing restart circuit with heat dissipation and overheating protection functions. Comprising a timing chip, a first MOS tube, a temperature detection unit and a radiator driving unit, an OSCO end pin of the timing chip is connected with an adjustable resistor, an adjustable end of the adjustable resistor is connected with an OSCI end pin of the timing chip, an OUTL end pin of the timing chip is connected with a grid electrode of the first MOS tube through a first resistor, and a source electrode of the first MOS tube outputs a power supply for supplying power to equipment. After the circuit structure is used, a user can quickly and simply realize a short-time power-off restart function of the equipment, does not need to log in a management page of the equipment to set time, and can restart the equipment after the equipment is powered off and shut down for a period of time through a switch on the equipment; and the device also has the capability of actively detecting the temperature, so that the device can be cooled or powered off in time, the device can be always in an optimal working state, and the device can be prevented from being abnormally damaged due to high temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a timing restart circuit for wireless network equipment with both heat dissipation and overheat protection. Background Art

[0002] As we all know, in today's Internet age, network devices are the core devices for Internet access, and the quality of network devices' functions will also determine the quality of network connections. Among them, the most common network devices are routers, switches, etc. These commonly used network devices are mostly used for real-time practicality in the process of user use, but there are still users who hope to be able to power on and restart in time after the power is turned off. These functions are mostly to log in to the device through the web page and then set the timed start of the device through the time management function. However, some users are not good at using the web page login management function, which makes it impossible for the device to start working normally after the expected period of time or restart the device that does not require precise time timing. In addition, the heat dissipation function cannot be turned on in time when heat dissipation is needed, and a large amount of heat energy is generated when the device is working at high power and full load. When working in a high temperature environment, the device will overheat and cannot be in the best working state, or even damaged, and lacks high temperature power-off protection.

[0003] Therefore, it is necessary to provide a hardware circuit to satisfy the functions of timed restart, autonomous heat dissipation, and power-off protection. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a wireless network device timing restart circuit with both heat dissipation and overheat protection.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A wireless network device timing restart circuit with both heat dissipation and overheat protection comprises a timing chip, a first MOS tube, a temperature detection unit and a heat sink driving unit, wherein the VDD pin, the KEY1 pin and the KEY2 pin of the timing chip are mutually connected and connected to the chip working power supply and are grounded through a first capacitor, the SW pin of the timing chip is connected to a switch, the OSCO pin of the timing chip is connected to an adjustable resistor, the adjustable end of the adjustable resistor is connected to the OSCI pin of the timing chip, the OUTL pin of the timing chip is connected to the gate of the first MOS tube through the first resistor, the gate of the first MOS tube is grounded through a fifth resistor, the source of the first MOS tube outputs the power supply for the device and is grounded through a third resistor, the drain of the first MOS tube is connected to the power supply for the device and is grounded through a second capacitor and a voltage regulator diode respectively, and the temperature detection unit and the heat dissipation cavity driving unit are connected to the connecting part of the first resistor and the gate of the first MOS tube.

[0007] Preferably, the radiator driving unit includes a second MOS tube and a plug connector for connecting the radiator, the gate of the second MOS tube is connected between the first resistor and the first MOS tube through a thermistor, the drain of the second MOS tube is connected to the power supply, and the source of the second MOS tube is connected to the plug connector and grounded through a fourth resistor and a third capacitor respectively.

[0008] Preferably, the temperature detection unit includes a temperature sensor and a third MOS tube, the temperature sensor is connected to the gate of the third MOS tube and grounded through a fifth resistor, the drain of the third MOS tube is connected between the first resistor and the first MOS tube, the drain of the third MOS tube is connected to an indicator light, and the positive pole of the indicator light is connected to the power supply through a sixth resistor.

[0009] Preferably, the model of the timing chip is EC340EGC.

[0010] Preferably, the model of the temperature sensor is LM50.

[0011] Due to the adoption of the above scheme, the utility model uses the above circuit structure to enable users to realize the short-time power-off restart function of the device more quickly and simply, without having to log in to the management page of the device to set the time. The switch on the device can restart the device after the device is powered off for a period of time. It also has the ability to actively detect the temperature and can dissipate heat or power off the device in time, so that the device can always be in the best working state, and abnormal high temperature damage to the device can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the circuit structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0014] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0015] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] like Figure 1 As shown, the present embodiment provides a wireless network device timing restart circuit with both heat dissipation and overheat protection, including a timing chip U1, a first MOS tube Q1, a temperature detection unit and a heat sink driving unit, the VDD terminal pin, the KEY1 terminal pin and the KEY2 terminal pin of the timing chip U1 are connected to each other and connected to the chip working power supply and grounded through the first capacitor C1, the SW terminal pin of the timing chip U1 is connected to a switch SW1, the OSCO terminal pin of the timing chip U1 is connected to an adjustable resistor R7, and the adjustable end of the adjustable resistor R7 is connected to the O The SCI terminal pin is connected, the OUTL terminal pin of the timing chip U1 is connected to the gate of the first MOS tube Q1 through the first resistor R1, the gate of the first MOS tube Q1 is grounded through the fifth resistor R5, the source of the first MOS tube Q1 outputs the power supply for the device and is grounded through the third resistor R3, the drain of the first MOS tube Q1 is connected to the power supply for the device to work and is grounded through the second capacitor C2 and the voltage regulator diode D1 respectively, and the temperature detection unit and the heat dissipation cavity driving unit are connected to the connection between the first resistor R1 and the gate of the first MOS tube Q1.

[0017] Further, the radiator driving unit includes a second MOS tube Q2 and a plug connector CN1 for connecting the radiator, the gate of the second MOS tube Q2 is connected between the first resistor R1 and the first MOS tube Q1 through the thermistor RT1, the drain of the second MOS tube Q2 is connected to the power supply, the source of the second MOS tube Q2 is connected to the plug connector CN1 and is grounded through the fourth resistor R4 and the third capacitor C3 respectively.

[0018] Further, the temperature detection unit includes a temperature sensor U2 and a third MOS tube Q3, the temperature sensor U2 is connected to the gate of the third MOS tube Q3 and is grounded through a fifth resistor R5, the drain of the third MOS tube Q3 is connected between the first resistor R1 and the first MOS tube Q1, the drain of the third MOS tube Q3 is connected to an indicator light D3, and the positive electrode of the indicator light D3 is connected to a power supply through a sixth resistor R6.

[0019] Furthermore, the model of the timing chip U1 is EC340EGC.

[0020] Furthermore, the model of the temperature sensor U2 is LM50.

[0021] The timing restart of this embodiment is mainly composed of a timing chip U1, a switch SW1, an adjustment resistor R7 and a first MOS tube to form a basic timing circuit; the thermistor RT1, the second MOS tube Q2 and the plug connector CN1 connected to a low-power cooling fan form a timely heat dissipation circuit; the temperature sensor U2 is a programmable sensor, the indicator light D3 is a temperature warning light and the third MOS tube Q3 forms an abnormal temperature device power-off.

[0022] The circuit function is realized mainly by using the timing chip U1 to control the passage and disconnection of the first MOS tube Q1, thereby realizing the on and off of the working power supply of the equipment. The timing chip U1 has a key input signal and an output level signal. The output level is used as the gate input signal of the first MOS tube Q1 to control its on and off. The switch SW1 is used as the input switch of the chip timing signal. The timing chip U1 does not work after powering on, and the 7-pin outputs a high level. The first MOS tube Q1 passes through VCC12 to supply power to the equipment normally. Pressing the switch SW1 for a short time makes the timing chip U1 start to work, the 7-pin outputs a low level, the first MOS tube Q1 is disconnected, and VCC12 does not supply power to the equipment, that is, the network equipment is powered off and shut down. By adjusting the resistor R7, the time when the timing chip U1 outputs a low level can be controlled, that is, the timing time of the equipment shutting down and restarting. When the timing is over, the output level of the 7-pin is reversed from a low level to a high level to make the first MOS tube Q1 pass through again, realizing the self-start of the equipment. The timing chip U1 can select different working modes through the two pins KEY1 and KEY2. When the two pins KEY1 and KEY2 are left floating, the timing mode is the standard timing time of the chip; when KEY1 is connected to VDD and KEY2 is left floating, it is 8 times the standard timing; when KEY1 is left floating and KEY2 is connected to VDD, it is 64 times the standard time; and when KEY1 and KEY2 are connected to VDD, it is 512 times the standard timing time. Therefore, different working modes can be selected according to the needs of timing time and cost to determine the maximum timing time.

[0023] When the device is overheated, that is, when the temperature rise is detected and it is not at the optimal working temperature of the device, the resistance of thermistor RT1 changes, and its resistance decreases to form a path, so that Q2 is opened, and CN1 forms a loop and starts working, which dissipates heat for the device in time to ensure the best working state of the device; after the heat is dissipated, the temperature decreases and the impedance of RT1 increases, disconnecting the heat dissipation circuit. The temperature sensor U2 can be programmed to set the minimum and maximum temperatures. In normal operation, the temperature sensor U2 does not issue instructions to the outside. When the temperature starts to change and reaches the set minimum or maximum value, that is, the minimum or maximum temperature that the device can withstand, the VO output voltage of the temperature sensor U2 turns on the third MOS tube Q3. At this time, the 7-pin output of the timing chip U1 will be grounded, the switch Q1 will be closed, the power supply of the device will be disconnected, and the indicator D3 will light up. When the ambient temperature drops to the temperature range set by the temperature sensor U2, the third MOS tube Q3 turns off the indicator D3 of the temperature warning function, and the first MOS tube Q1 is reopened to power on the device.

[0024] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wireless network device timed restart circuit with both heat dissipation and overheat protection, characterized in that: The invention comprises a timing chip, a first MOS tube, a temperature detection unit and a heat sink driving unit. The VDD pin, the KEY1 pin and the KEY2 pin of the timing chip are connected to each other and connected to the chip working power supply and grounded through a first capacitor. The SW pin of the timing chip is connected to a switch. The OSCO pin of the timing chip is connected to an adjustable resistor. The adjustable end of the adjustable resistor is connected to the OSCI pin of the timing chip. The OUTL pin of the timing chip is connected to the gate of the first MOS tube through a first resistor. The gate of the first MOS tube is grounded through a fifth resistor. The source of the first MOS tube outputs the power supply for the device and is grounded through a third resistor. The drain of the first MOS tube is connected to the power supply for the device and is grounded through a second capacitor and a voltage regulator diode respectively. The temperature detection unit and the heat sink driving unit are connected to the connecting part of the first resistor and the gate of the first MOS tube.

2. A wireless network device timed restart circuit with both heat dissipation and overheat protection as claimed in claim 1, characterized in that: The radiator driving unit includes a second MOS tube and a plug connector for connecting the radiator, the gate of the second MOS tube is connected between the first resistor and the first MOS tube through a thermistor, the drain of the second MOS tube is connected to a power supply, and the source of the second MOS tube is connected to the plug connector and grounded through a fourth resistor and a third capacitor respectively.

3. A wireless network device timed restart circuit with both heat dissipation and overheat protection as claimed in claim 1, characterized in that: The temperature detection unit includes a temperature sensor and a third MOS tube, the temperature sensor is connected to the gate of the third MOS tube and is grounded through a fifth resistor, the drain of the third MOS tube is connected between the first resistor and the first MOS tube, the drain of the third MOS tube is connected to an indicator light, and the positive pole of the indicator light is connected to a power supply through a sixth resistor.

4. A wireless network device timed restart circuit with both heat dissipation and overheat protection as claimed in claim 1, characterized in that: The model of the timing chip is EC340EGC.

5. A wireless network device timed restart circuit with both heat dissipation and overheat protection as claimed in claim 3, characterized in that: The model of the temperature sensor is LM50.

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