CN210781389U

CN210781389U - Server mainboard heating circuit

Info

Publication number: CN210781389U
Application number: CN201921430442.4U
Authority: CN
Inventors: 秦清松
Original assignee: Suzhou Inspur Intelligent Technology Co Ltd
Current assignee: Suzhou Inspur Intelligent Technology Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-16
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a server mainboard heating circuit, which comprises a temperature sensing module, a control module, a heating module and a power module; the power supply module supplies power to the heating module, the temperature sensing module outputs a voltage signal to the control module, and the control module switches on or off a power supply loop of the power supply module and the heating module according to the input voltage signal. The heating circuit arranged on the server mainboard can effectively realize normal startup and operation of the server, improves the working reliability of the server product in plateau environment and low-temperature environment, and has higher application value. The field effect transistor is adopted to effectively prevent the short circuit of the heating resistance wires, and the filter capacitor is adopted to protect the voltage stabilization, so that the working reliability of the heating circuit is improved.

Description

Server mainboard heating circuit

Technical Field

The utility model relates to a server mainboard wiring field, concretely relates to server mainboard heating circuit.

Background

With the rapid development of science and technology, servers have been widely used in various industries. For industries that need to work on plateau or other low temperature environments, sometimes a server needs to be started normally at low temperature.

In order to ensure that the server can be normally started in a low-temperature environment, it is necessary to ensure that a chip used inside the server can normally work at a low temperature. However, the requirement of the conventional common server on the working environment is low during product design, so that when the common server is applied to a low-temperature environment, a part of server chips, such as a CPU, a PCH and the like, cannot normally run, and therefore, the server cannot be normally started and operated at a low temperature, and cannot meet the actual use requirements of a plateau or other low-temperature environments.

Disclosure of Invention

In order to solve the problem, the utility model provides a server mainboard heating circuit realizes the low temperature start of server mainboard through setting up heating circuit on the server mainboard.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a server mainboard heating circuit is characterized by comprising a temperature sensing module, a control module, a heating module and a power supply module; the power supply module supplies power to the heating module, the temperature sensing module outputs a voltage signal to the control module, and the control module switches on or off a power supply loop of the power supply module and the heating module according to the input voltage signal;

the input end of the control module is the reverse-phase input end of a temperature comparator, the non-inverting input end of the temperature comparator inputs a set threshold voltage value, the output end of the control module is connected with the G end of an N-channel field effect transistor Q2 through a resistor R4, the S end of Q2 is grounded, the first path of the D end of Q2 is connected with a 5V _ ALW signal through R2, the second path of the D end of the Q2 is grounded through a capacitor C2, the third path of the D end of an N-channel field effect transistor Q1 is grounded, the S end of Q1 is grounded, the first path of the D end of Q1 is connected with the G end of a field effect transistor MOS1, the other path of the D end of the Q1 is connected with one end of an R3, the first path of the other end of R3 is grounded through a capacitor C1, the second path of the power module, the third path of the heating module is connected with one end of.

Further, the temperature comparator is AD8072, where pin 1 is an output terminal, pin 2 is an inverting input terminal, pin 3 is a non-inverting input terminal, pin 4 is connected to the 5V _ ALW signal, and pin 8 is grounded.

Further, the temperature sensing module comprises a temperature sensor, and the output end of the temperature sensor is used as the output end of the temperature sensing module.

Further, the temperature sensor is LM 92.

Further, the power module outputs a 5V _ ALW signal.

Further, the heating module comprises a heating resistance wire.

Further, the length of the heating resistance wire is 20000-250000mils, and the width of the heating resistance wire is 10 mils.

Further, the heating resistance wire is wound at the CPU and the PCH of the server mainboard.

The utility model has the advantages that:

the utility model provides a server mainboard heating circuit can realize the normal start of server and operation effectively through the heating circuit who sets up on the server mainboard, improves the operational reliability of server product under plateau environment and low temperature environment, has higher using value.

The utility model discloses an adopt field effect transistor effectively to prevent the short circuit of heating resistor silk, adopt filter capacitor protection steady voltage, improved heating circuit's operational reliability.

Drawings

Fig. 1 is a circuit structure diagram of the embodiment of the present invention.

Detailed Description

In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily limit the invention.

An embodiment of the utility model provides a server mainboard heating circuit, which comprises a temperature sensing module, a control module, a heating module and a power module; the power supply module supplies power to the heating module, the temperature sensing module outputs a voltage signal to the control module, and the control module switches on or off a power supply loop of the power supply module and the heating module according to the input voltage signal.

As shown in fig. 1, the input end of the control module is the inverted input end of pin 2 of the temperature comparator AD8072, pin 3 of the temperature comparator AD8072 is the non-inverted input end, pin 4 is connected to the 5V _ ALW signal, pin 8 is grounded, and pin 1 is the output end.

Pin 2 of temperature comparator AD8072 is used for inputing the voltage signal of temperature sensing module output, and temperature sensing module includes temperature sensor, the temperature sensor output is as temperature sensing module's output.

The temperature sensor is preferably LM92, and may be disposed near a chip having a high temperature to the operating environment, such as a CPU or a PCH of a server motherboard.

A preset threshold voltage is input to pin 3 of the temperature comparator AD 8072. A pin 1 of the temperature comparator is connected with a G end of an N-channel field effect transistor Q2 through a resistor R4, an S end of a Q2 is grounded, a first path of a D end of a Q2 is connected with a 5V _ ALW signal through an R2, a second path of the D end is grounded through a capacitor C2, a third path of the D end is connected with a G end of an N-channel field effect transistor Q1, an S end of a Q1 is grounded, one path of the D end of the Q1 is connected with the G end of a field effect transistor MOS1, the other path of the D end is connected with one end of an R3, the first path of the other end of the R3 is grounded through a capacitor C1, the second path of the D end is connected with a power module, the third path of the heating module is connected with one end of a MOS1, the S end of the MOS. The power module outputs a 5V _ ALW signal.

The heating module comprises a heating resistance wire, the length of the heating resistance wire is preferably 20000-250000mils, the width of the heating resistance wire is preferably 10mils, and the heating resistance wire is wound on a CPU, a PCH and the like of a server mainboard.

When the temperature detected by the temperature sensor is too low, the temperature comparator outputs a high level, the Q2 receives a high level signal and enters a conducting state, the Q1 is cut off, the MOS1 receives the high level signal at the moment, and the 5V direct-current power supply supplies power to the heating resistance wire, so that the heating resistance wire heats chips such as a CPU (Central processing Unit) and a PCH (programmable logic controller) of the circuit board.

After the heating circuit heats, the server normally starts, the temperature detected by the temperature sensor rises, the temperature comparator outputs a low level, Q2 receives a low level signal and enters a cut-off state, Q1 is conducted, MOS1 receives the low level signal and enters the cut-off state, the 5V direct current power supply does not supply power for the heating resistance wire any more, and the heating circuit stops heating.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto. Various modifications and alterations will occur to those skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. On the basis of the technical scheme of the utility model, various modifications or deformations that technical personnel in the field need not pay out creative work and can make still are within the protection scope of the utility model.

Claims

1. A server mainboard heating circuit is characterized by comprising a temperature sensing module, a control module, a heating module and a power supply module; the power supply module supplies power to the heating module, the temperature sensing module outputs a voltage signal to the control module, and the control module switches on or off a power supply loop of the power supply module and the heating module according to the input voltage signal;

2. The heating circuit of claim 1, wherein the temperature comparator is AD8072, wherein pin 1 is an output, pin 2 is an inverting input, pin 3 is a non-inverting input, pin 4 is connected to the 5V _ ALW signal, and pin 8 is connected to ground.

3. The server motherboard heating circuit of claim 1 wherein said temperature sensing module comprises a temperature sensor, said temperature sensor output serving as a temperature sensing module output.

4. The server board heating circuit according to claim 3, wherein the temperature sensor is LM 92.

5. The server motherboard heating circuit of claim 1 wherein said power module outputs a 5V ALW signal.

6. The server motherboard heating circuit of claim 1 wherein said heating module comprises a heating resistance wire.

7. The server motherboard heating circuit as claimed in claim 6, wherein the heating resistance wire has a length of 20000-250000mils and a width of 10 mils.

8. The server motherboard heating circuit of claim 7, wherein said heating resistance wire is wound around the CPU and PCH of the server motherboard.