CN-224217031-U - Temperature switching circuit of electronic element module and electronic element module with mode switching function

CN224217031UCN 224217031 UCN224217031 UCN 224217031UCN-224217031-U

Abstract

The utility model relates to the technical field of aging modules and provides a temperature switching circuit of an electronic element module and the electronic element module with a mode switching function, wherein the temperature switching circuit comprises a temperature acquisition module, a heating module and a switching module, the heating module is used for heating the environment where the electronic element module is located, the temperature acquisition module is used for acquiring the ambient temperature, the switching module is used for controlling the heating module according to the temperature requirement, the temperature acquisition module is a thermistor, the switching module comprises a comparator, one input end of the comparator is connected with a voltage dividing circuit where the thermistor is located, the other input end of the comparator is connected with a voltage dividing circuit where a temperature regulating resistor is located, the temperature regulating resistor comprises a first resistor and a second resistor, the first resistor is connected with two ends of the second resistor in parallel through a controllable switch, and the controllable switch is used for being disconnected when the electronic element module needs to be in an operating mode and being closed when the electronic element module needs to be in the aging mode, so that the accurate temperature regulation of the heating module is realized.

Inventors

JI JIANSHE
DU ZHENGZHOU
LIU LIBING
LI LONGLONG
MA RUIBO
LI XIANG
JIA HAILIANG
LI BAOFENG
Zhao guangdong

Assignees

河南许继仪表有限公司

Dates

Publication Date: 20260508
Application Date: 20250627

Claims (10)

1. The temperature switching circuit of the electronic element module comprises a temperature acquisition module, a heating module and a switching module, wherein the heating module is used for heating the environment where the electronic element module is located, the temperature acquisition module is used for acquiring the ambient temperature, the switching module is used for controlling the heating module according to the temperature requirement, the temperature switching circuit is characterized in that the temperature acquisition module is a thermistor, the switching module comprises a comparator, one input end of the comparator is connected with a voltage dividing circuit where the thermistor is located, the other input end of the comparator is connected with the voltage dividing circuit where the temperature regulating resistor is located, the temperature regulating resistor comprises a first resistor and a second resistor, the first resistor is connected in parallel with the two ends of the second resistor through controllable switches, the controllable switches are used for being disconnected when the electronic element module is required to be in an aging mode, the resistance of the second resistor is equal to the resistance of the thermistor at the temperature corresponding to the working mode, and the resistance of the thermistor connected in parallel with the first resistor and the second resistor is equal to the resistance of the thermistor at the temperature corresponding to the aging mode.
2. The temperature switching circuit of an electronic component module according to claim 1, wherein the voltage dividing circuit of the thermistor and the voltage dividing circuit of the temperature adjusting resistor form a bridge circuit, the thermistor is connected in series with the first current limiting resistor, the temperature adjusting resistor is connected in series with the second current limiting resistor, the two series circuits are connected in parallel between the power supply and the ground, and two input ends of the comparator are respectively connected to a connection point of the thermistor and the first current limiting resistor and a connection point of the temperature adjusting resistor and the second current limiting resistor.
3. The temperature switching circuit of an electronic component module according to claim 1, wherein the heating module is disposed on a substrate where the electronic component module is located and is used for heating an environment where the electronic component module is located, the heating module includes a resistance heater, a heating control switch is disposed in a power supply loop of the resistance heater, and the heating control switch is connected to an output end of the comparator and is controlled by the output end of the comparator.
4. The temperature switching circuit of an electronic component module according to claim 3, wherein a filtering current limiting circuit is further arranged between the output end of the comparator and the heating control switch, and the filtering current limiting circuit adopts a resistance-capacitance filtering circuit.
5. The electronic element module with the mode switching function is characterized by comprising an electronic element module arranged on a substrate and a temperature switching circuit for providing a specific temperature environment for the electronic element module, wherein the temperature switching circuit comprises a temperature acquisition module, a heating module and a switching module, the temperature acquisition module is a thermistor, the heating module and the temperature acquisition module are both arranged on the substrate, the switching module comprises a comparator, one input end of the comparator is connected with a voltage dividing circuit where the thermistor is positioned, the other input end of the comparator is connected with the voltage dividing circuit where a temperature regulating resistor is positioned, the output end of the comparator is controlled and connected with the heating module, the temperature regulating resistor comprises a first resistor and a second resistor, the first resistor is connected with two ends of the second resistor in parallel through a controllable switch, the controllable switch is used for being disconnected when the electronic element module needs to be in an ageing mode, the resistance of the second resistor is equal to the resistance of the thermistor at the temperature corresponding to the ageing mode, and the resistance of the first resistor and the second resistor in parallel connection is equal to the resistance of the thermistor at the temperature corresponding to the ageing mode.
6. The electronic component module with mode switching function according to claim 5, wherein a heat insulating layer is provided on the periphery of the substrate.
7. The electronic component module with mode switching function according to claim 5, wherein the voltage dividing circuit where the thermistor is located and the voltage dividing circuit where the temperature adjusting resistor is located form a bridge circuit, the thermistor is connected in series with the first current limiting resistor in the bridge circuit, the temperature adjusting resistor is connected in series with the second current limiting resistor in the bridge circuit, the two series circuits are connected in parallel between the power supply and the ground, and two input ends of the comparator are respectively connected to a connection point of the thermistor and the first current limiting resistor and a connection point of the temperature adjusting resistor and the second current limiting resistor.
8. The electronic component module with mode switching function according to claim 5, wherein the heating module is disposed on a substrate where the electronic component module is located to heat an environment where the electronic component module is located, the heating module includes a resistance heater, a heating control switch is disposed in a power supply loop of the resistance heater, and the heating control switch is connected to an output end of the comparator and controlled by the output end of the comparator.
9. The electronic component module with mode switching function according to claim 8, wherein a filtering current limiting circuit is further arranged between the output end of the comparator and the heating control switch, and the filtering current limiting circuit adopts a resistance-capacitance filtering circuit.
10. The electronic component module with mode switching function according to claim 8, wherein the resistive heater comprises at least one heating resistor, each heating resistor being disposed on the substrate.

Description

Temperature switching circuit of electronic element module and electronic element module with mode switching function Technical Field The present utility model relates to the field of aging modules, and more particularly to a temperature switching circuit of an electronic component module and an electronic component module with a mode switching function. Background Some existing electronic component modules (such as capacitors, diodes, electric energy meters, etc.) have relatively unstable performance at the beginning of use, and the probability of failure of the electronic component module is relatively high at this stage. However, after the electronic component module is aged for a period of time, the electronic component module enters a long stabilization period, which is generally several years to more than ten years, and the performance of the electronic component module is hardly changed in the stabilization period, so that the failure probability is greatly reduced compared with that of the electronic component module when the electronic component module is initially used. Therefore, the electronic component is aged during the production of the electronic component module, so that the electronic component module can stably work for a long time. Referring to fig. 1, an aging device for a 0.01-level standard electric energy meter module in the prior art is shown, and based on the aging device, the conventional common aging scheme for the standard electric energy meter module is that a reference diode in the standard electric energy meter module to be aged is connected with an external power supply, an electrified standard electric energy meter is placed in a high-temperature box, and the standard electric energy meter module is electrified for 1000 hours or 2000 hours in an environment of 105 ℃ to realize the aging of the standard electric energy meter module. However, in the scheme, the high-temperature box can only provide an ageing environment of 105 ℃ for the standard electric energy meter, after ageing is completed, the standard electric energy meter module is required to be taken out, and then a working environment of 45 ℃ is provided for the standard electric energy meter, so that the standard electric energy meter stably works, and the operation flow is complex. In order to solve the problem that a high-temperature box in the prior art can only provide single fixed temperature, chinese patent document with publication number of CN214201671U discloses a control heating system for hysteresis loop transmission characteristics, which comprises a temperature acquisition circuit for acquiring the temperature of a heated chip, a constant-temperature control module for adjusting the temperature and a heating module for heating the chip. The temperature acquisition circuit in the patent document acquires the temperature of the chip in real time by using a thermistor, and changes the resistance value according to the temperature, so that the voltage value on the thermistor also changes. In the constant temperature control module, an operational amplifier collects voltage on a thermistor as input of a positive input end, and collects voltage on a sliding rheostat connected in parallel with the thermistor as input of a negative input end, and different heating temperatures are switched by adjusting resistance values of the sliding rheostat. The problem that the high-temperature box can only provide single temperature heating, can't adapt to more service scenario has been solved to this scheme, but in this patent document, need adjust the resistance of slide rheostat and adjust heating temperature of heating module, if slide rheostat is not adjusted in place, lead to heating module unable to provide accurate heating temperature for the chip. Disclosure of utility model The utility model aims to provide a temperature switching circuit of an electronic element module and the electronic element module with a mode switching function, so as to solve the problem that the temperature is not easy to accurately adjust to a corresponding temperature when the working mode of a heating module is switched in the prior art. The utility model provides a temperature switching circuit of an electronic element module, which comprises a temperature acquisition module, a heating module and a switching module, wherein the heating module is used for heating the environment where the electronic element module is located, the temperature acquisition module is used for acquiring the ambient temperature, the switching module is used for controlling the heating module according to the temperature requirement, the temperature acquisition module is a thermistor, the switching module comprises a comparator, one input end of the comparator is connected with a voltage dividing circuit where the thermistor is located, the other input end of the comparator is connected with the voltage dividing circuit where a temperature regulating resisto