Power-off endurance control device

Abstract

The utility model is suitable for the technical field of power equipment control, and provides a power-off endurance control device, which comprises a normally open electromagnetic switch, a heater, a first temperature sensor, a second temperature sensor, a controller, a timer and a power supply unit, the first temperature sensor is used for measuring the environment temperature; the second temperature sensor is used for measuring the temperature of the equipment to be subjected to temperature control; the heater is used for heating equipment to be subjected to temperature control and is connected with an electric power supply line; the normally-open electromagnetic switch is arranged between the heater and the electric power supply line and used for controlling the on-off condition of the heater and the electric power supply line. The heater is matched with the normally-open switch, and after power supply is recovered, the equipment to be subjected to temperature control is heated at the first time. The equipment temperature and the environment temperature are obtained through the temperature sensor, damage to the equipment due to the too high heating temperature is avoided, and then the equipment is helped to be quickly recovered to the normal temperature from the low temperature.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the control technical field of electric power equipment, especially relates to a power-off endurance control device. BACKGROUND

[0002] Generally, power electronics or electrical equipment are connected to the power grid to work and use normally, and the power grid power-off may have various reasons, including but not limited to, for example, weather reasons, such as lightning, storm and other severe weather may cause power grid equipment damage or power transmission line affected; Equipment failure reason, power plant, substation or transmission line equipment failure or damage; Human operation error reason, that is, the operator error operation or management failure, leading to power grid system failure.

[0003] And if you want to maintain the device to return to normal work after power-off, it is necessary to design according to the different use environment and use scene of the device to avoid equipment failure.

[0004] In some cold regions, the device will generate heat inside when working normally, which will help the device not to be significantly affected by severe low temperature and maintain a relatively normal working state. But after a long time power-off, the temperature of these devices is at a low level, and it is difficult to automatically restart normally after power recovery, which brings great risk to the operation of the device and increases the maintenance difficulty and cost. INVENTION CONTENTS

[0005] The purpose of the embodiment of the present application is to provide a power-off endurance control device, which aims to solve the problem that in some cold regions, the device will generate heat inside when working normally, which will help the device not to be significantly affected by severe low temperature and maintain a relatively normal working state. But after a long time power-off, the temperature of these devices is at a low level, and it is difficult to automatically restart normally after power recovery, which brings great risk to the operation of the device and increases the maintenance difficulty and cost.

[0006] The embodiment of the present application is realized in this way, a power-off endurance control device is provided, the power-off endurance control device comprises:

[0007] The normally open electromagnetic switch, the heater, the first temperature sensor, the second temperature sensor, the controller, the timer and the power supply unit;

[0008] The power supply unit is used for voltage transformation and is connected with the timer and the controller, and is used for power supply to the timer and the controller;

[0009] The timer is used for timing and is connected with the controller, and is used for outputting clock signal to the controller;

[0010] The controller is a single-chip microcomputer, which is used for controlling the on-off of the normally open electromagnetic switch.

[0011] The first temperature sensor is connected with the controller, which is used for measuring the ambient temperature and outputting a first temperature signal to the controller.

[0012] The second temperature sensor is connected with the controller, which is used for measuring the temperature of the temperature-controlled device and outputting a second temperature signal to the controller.

[0013] The heater is used for heating the temperature-controlled device and is connected with the power supply line.

[0014] The normally open electromagnetic switch is arranged between the heater and the power supply line, which is used for controlling the on-off of the heater and the power supply line.

[0015] Preferably, the normally open electromagnetic switch is an electromagnetic relay, the control end of the electromagnetic relay is connected with the controller, the first controlled end of the electromagnetic relay is connected with the power supply line, and the second controlled end of the electromagnetic relay is connected with the heater.

[0016] When the control end does not output voltage, the first controlled end and the second controlled end are in communication.

[0017] Preferably, the first temperature sensor and the second temperature sensor are both thermocouples.

[0018] Preferably, the timer comprises a capacitor C1, a capacitor C2 and an oscillator XTAL, the first end of the oscillator XTAL is connected with the first clock input end of the controller, the second end of the oscillator XTAL is connected with the second clock input end of the controller, the first end of the oscillator XTAL is also connected with the first end of the capacitor C1, the second end of the capacitor C1 is grounded, the second end of the capacitor C2 is grounded, and the second end of the capacitor C2 is also connected with the first end of the capacitor C2.

[0019] Preferably, the power-off endurance control device further comprises an alarm unit, the alarm unit is connected with the controller, and comprises an audible and visual alarm, and the audible and visual alarm works when the heater is powered on.

[0020] Preferably, the alarm unit comprises a buzzer LS1, a triode Q1, a light-emitting diode D1, a resistor R2 and a resistor R1.

[0021] The first end of the resistor R1 is connected with the controller, the second end of the resistor R1 is connected with the base of the transistor Q1, the collector of the transistor Q1 is connected with the power supply unit, the emitter of the transistor Q1 is connected with the first end of the resistor R2, the second end of the resistor R2 is connected with the first end of the light emitting diode D1, the second end of the light emitting diode D1 is connected with the first end of the buzzer LS1 and then grounded, and the second end of the buzzer LS1 is connected with the first end of the resistor R2.

[0022] Preferably, the controller adopts an STM32 single-chip microcomputer, the GND terminal of which is grounded, and the VSS terminal and the VDD terminal of which are both connected with the power supply unit.

[0023] Preferably, the heater is a phase change heating device.

[0024] The power-off endurance control device provided by the embodiment has the following advantages: first, the normally open switch and the heater are provided, the normally open switch can make the heating equipment conductive at the first time after the power supply line restores power supply, so as to heat the temperature-controlled equipment and make it quickly recover from low temperature; second, two temperature sensors are provided, the temperature sensors are used to simultaneously acquire the equipment temperature of the temperature-controlled equipment and the ambient temperature outside the equipment, so as to avoid that the heating temperature is too high to damage the equipment, and thus help the equipment quickly recover to normal temperature from low temperature; and third, the timer is used as a safety device to input a timing signal, and the longest heating time of the heater is controlled when the temperature sensor works abnormally or has no signal. The device has a high temperature increasing speed and high safety for electronic and electrical equipment. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structural block diagram of the power-off endurance control device provided by the embodiment is shown in the figure;

[0026] Figure 2 A circuit diagram of partial devices of the power-off endurance control device provided by the embodiment is shown in the figure. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0028] As to the "coupling" or "connection" used herein, it can refer to that two or more elements are in direct physical or electrical contact with each other, or are indirectly in physical or electrical contact with each other, or can refer to that two or more elements operate or act with each other. The term "circuit" generally refers to an object connected by one or more transistors and / or one or more active or passive elements in a certain way to process signals.

[0029] However, it is to be understood by those skilled in the art that the same element can be called by different names. The name used is intended to change only the name and not the element's function. The application is not to be limited in scope by the embodiments disclosed.

[0030] In addition, features of the various embodiments of the application are described or claimed in both singular and plural form. However, the use of the singular and the plural form is not intended to import any kind of limitation but is intended to describe various embodiments of the application in a concise and clear manner. Moreover, the use of the terms "a", "an" and "the" are each intended to include both the singular and the plural forms unless the context clearly indicates otherwise.

[0031] The specific implementation of the application is described in detail below in conjunction with specific embodiments.

[0032] As shown in Figure 1 A structure block of a power-off endurance control device provided by an embodiment of the application includes:

[0033] The power-off endurance control device includes:

[0034] The power-off endurance control device includes:

[0035] The power supply unit is used for voltage conversion and is connected with the timer and the controller, and is used for supplying power to the timer and the controller;

[0036] The timer is used for timing and is connected with the controller, and is used for outputting a clock signal to the controller;

[0037] The controller is a single-chip microcomputer, and is used for controlling the on-off of the normally open electromagnetic switch;

[0038] The first temperature sensor is connected with the controller, and is used for measuring an ambient temperature and outputting a first temperature signal to the controller;

[0039] The second temperature sensor is connected with the controller, and is used for measuring a temperature of a temperature-controlled device and outputting a second temperature signal to the controller;

[0040] The heater is used for heating the temperature-controlled device and is connected with a power supply line;

[0041] The normally open electromagnetic switch is arranged between the heater and the power supply line, and is used for controlling the on-off of the heater and the power supply line.

[0042] In the application example, the power supply unit can be used for voltage conversion, connected with the power line, and supplies the required voltage to the device input to power the device. The power supply unit can use a cold-resistant electrical device such as an electromagnetic transformer. The timer is used for timing. When powered on, the timer starts timing. When the preset maximum heating time is reached, the heater is controlled to stop heating. The function is to avoid damage caused by long-time heating after the temperature sensor fails. The controller can use a wide-temperature single-chip microcomputer, and its working temperature can be between -65 degrees and 130 degrees. The first temperature sensor is used to detect the ambient temperature, and its priority can be set to the highest. When the ambient temperature is higher than the first preset value, the normally open electromagnetic switch is in the cooperation state, and the heater is maintained closed, even if it is in the non-heating state. The second temperature switch is used to detect the temperature of the temperature-controlled device, which can be connected to the internal device, such as the main control unit. When the temperature of the temperature-controlled device is higher than the second preset value, the heater is turned off. The first and second preset values can be set based on the actual situation of the single-chip microcomputer, or the comparator can be compared with the reference value using an analog circuit. The scheme is not limited. The normally open electromagnetic switch can be various types of normally open light, for example, when the control end is powered on, the control between the two controlled ends is disconnected; when there is no power, the two controlled ends are connected.

[0043] Because many electronic and electrical devices use large capacitors and other components for state maintenance, low temperature will cause the power storage of these components to be quickly lost. Therefore, after a long power outage and low temperature, many devices cannot automatically start. Therefore, the power outage endurance control device provided by the application embodiment has the following advantages: first, the normally open switch and the heater are provided. The normally open switch can make the heating device conductive as soon as possible after the power supply line is restored to power, so as to heat the temperature-controlled device and quickly recover it from low temperature. Second, two temperature sensors are provided to obtain the device temperature of the temperature-controlled device and the ambient temperature outside the device, so as to avoid damage to the device caused by high heating temperature, and to help the device quickly recover to normal temperature from low temperature. Third, the timer is used as an insurance device to input a timing signal, and control the maximum heating time of the heater when the temperature sensor is abnormal or has no signal. The device has a fast temperature increase speed and high safety for electronic and electrical devices.

[0044] As a preferred embodiment of the application, the normally open electromagnetic switch is an electromagnetic relay, the control end of the electromagnetic relay is connected with the controller, the first controlled end of the electromagnetic relay is connected with the power supply line, and the second controlled end of the electromagnetic relay is connected with the heater.

[0045] When the control end does not output voltage, the first controlled end and the second controlled end are in communication.

[0046] In the embodiment of the present application, the electromagnetic relay can be used as a normally open switch, and the device cost is low.

[0047] As another preferred embodiment of the present application, the first temperature sensor and the second temperature sensor are both thermocouples.

[0048] As another preferred embodiment of the present application, as shown in Figure 2 A schematic diagram of a timer is shown. The timer comprises a capacitor C1, a capacitor C2, an oscillator XTAL, a first end of the oscillator XTAL is connected to a first clock input end of the controller, a second end of the oscillator XTAL is connected to a second clock input end of the controller, the first end of the oscillator XTAL is also connected to a first end of the capacitor C1, the second end of the oscillator XTAL is also connected to a first end of the capacitor C2, a second end of the capacitor C1 is grounded, and a second end of the capacitor C2 is grounded.

[0049] In the embodiment of the present application, Figure 2 The circuit diagram in the embodiment of the present application can contain more or less elements or units, and the present application only lists some key elements.

[0050] As another preferred embodiment of the present application, the power-off endurance control device further comprises an alarm unit, the alarm unit is connected to the controller, and comprises an audible and visual alarm, and the audible and visual alarm works when the heater is powered on.

[0051] In the embodiment of the present application, the alarm unit can be a heating display, when heating, the buzzer emits a buzzing sound, and the light emitting diode emits light.

[0052] As another preferred embodiment of the present application, the alarm unit comprises a buzzer LS1, a transistor Q1, a light emitting diode D1, a resistor R2, and a resistor R1,

[0053] A first end of the resistor R1 is connected to the controller, a second end of the resistor R1 is connected to a base of the transistor Q1, a collector of the transistor Q1 is connected to the power supply unit, an emitter of the transistor Q1 is connected to a first end of the resistor R2, a second end of the resistor R2 is connected to a first end of the light emitting diode D1, a second end of the light emitting diode D1 is connected to a first end of the buzzer LS1 and then grounded, and a second end of the buzzer LS1 is connected to the first end of the resistor R2.

[0054] In the embodiment of the present application, as shown in Figure 2 A specific alarm unit circuit setting mode is shown.

[0055] As another preferred embodiment of the present application, the controller adopts an STM32 single-chip microcomputer, a GND terminal is grounded, and a VSS terminal and a VDD terminal are both connected to the power supply unit.

[0056] In the embodiment of the present application, an STM32 mainstream single-chip microcomputer is adopted, and the single-chip microcomputer port in the controller is set.

[0057] As another preferred embodiment of the present application, the heater is a phase change heating device.

[0058] In the embodiment of the present application, the heating device has high safety, can be wrapped on the outside of the temperature-controlled equipment or / and the present device, provides temperature maintenance, and has good heat preservation.

[0059] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power-off endurance control device, characterized by comprising: The power-off endurance control device comprises: a normally open electromagnetic switch, a heater, a first temperature sensor, a second temperature sensor, a controller, a timer and a power supply unit; the power supply unit is used for voltage transformation and is connected with the timer and the controller to supply power to the timer and the controller; the timer is used for timing and is connected with the controller to output a clock signal to the controller; the controller is a single-chip microcomputer and is used for controlling the on-off of the normally open electromagnetic switch; the first temperature sensor is connected with the controller to measure the ambient temperature and output a first temperature signal to the controller; the second temperature sensor is connected with the controller to measure the temperature of the temperature-controlled device and output a second temperature signal to the controller; the heater is used for heating the temperature-controlled device and is connected with the power supply line; the normally open electromagnetic switch is arranged between the heater and the power supply line to control the on-off of the heater and the power supply line.

2. The de-energization continuation control device according to claim 1, characterized by the normally open electromagnetic switch is an electromagnetic relay, the control end of the electromagnetic relay is connected with the controller, the first controlled end of the electromagnetic relay is connected with the power supply line, and the second controlled end of the electromagnetic relay is connected with the heater; when the control end does not output a voltage, the first controlled end and the second controlled end are in communication.

3. The de-energization continuation control device according to claim 1, characterized by the first temperature sensor and the second temperature sensor are both thermocouples.

4. The de-energization continuation control device according to claim 1, characterized by the timer comprises a capacitor C1, a capacitor C2 and an oscillator XTAL, the first end of the oscillator XTAL is connected with the first clock input end of the controller, the second end of the oscillator XTAL is connected with the second clock input end of the controller, the first end of the oscillator XTAL is also connected with the first end of the capacitor C1, the second end of the capacitor C1 is grounded, the second end of the capacitor C2 is grounded, and the second end of the capacitor C2 is also connected with the first end of the capacitor C2.

5. The de-energization continuation control device according to claim 1, characterized by the power-off endurance control device further comprises an alarm unit, the alarm unit is connected with the controller and comprises an audible and visual alarm, and the audible and visual alarm works when the heater is powered on.

6. The de-energization continuation control device according to claim 5, characterized by the alarm unit comprises a buzzer LS1, a transistor Q1, a light-emitting diode D1, a resistor R2 and a resistor R1, the first end of the resistor R1 is connected with the controller, the second end of the resistor R1 is connected with the base of the transistor Q1, the collector of the transistor Q1 is connected with the power supply unit, the emitter of the transistor Q1 is connected with the first end of the resistor R2, the second end of the resistor R2 is connected with the first end of the light-emitting diode D1, the second end of the light-emitting diode D1 is connected with the first end of the buzzer LS1 and then grounded, and the second end of the buzzer LS1 is connected with the first end of the resistor R2.

7. The de-energization continuation control device according to claim 1, characterized by the controller adopts an STM32 single-chip microcomputer, the GND terminal is grounded, and the VSS terminal and the VDD terminal are both connected with the power supply unit.

8. The de-energization continuation control device according to claim 1, characterized by the heater is a phase-change heating device.

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