Temperature control system of electronic equipment

Abstract

The utility model relates to a temperature control system of electronic equipment. The temperature control system comprises a power supply; the switch is electrically connected with the power supply; the heating unit is electrically connected with the switch and used for obtaining temperature information of the environment where the electronic equipment is located before the electronic equipment starts to work, generating heat when the temperature of the environment where the electronic equipment is located is smaller than a temperature threshold value and transmitting the heat to the electronic equipment and / or the environment where the electronic equipment is located through heat transmission. The temperature of the environment where the electronic equipment is located is larger than or equal to the temperature threshold. The heating unit is controlled to work by monitoring the temperature of the environment where the electronic equipment is located, so that the temperature of the environment where the electronic equipment is located is adjusted, the environment temperature requirement for normal work of the electronic equipment is met, and meanwhile different power supply strategies are adopted before and after the electronic equipment starts to work.

Description

Technical Field

[0001] The utility model relates to the technical field of communication equipment, in particular to a temperature control system of electronic equipment. Background Art

[0002] Extremely cold environments can have adverse effects on electronic components and detectors inside equipment such as infrared thermal imagers, causing them to fail to work properly and further leading to abnormal or interrupted data transmission and processing.

[0003] Therefore, in the prior art, a heat preservation chamber is often added inside the infrared thermal imager to maintain the internal temperature of the thermal imager within the working temperature range, or a double heat preservation method of silicon nanoporous heat preservation layer and infrared radiation film heating is adopted to ensure that the working environment temperature of the equipment is not lower than the ideal temperature condition (such as not lower than -30°C). However, the above temperature control structure design will cause the overall weight and volume of the infrared thermal imager to increase. At the same time, the above double heat preservation method also has the defect of slow heating speed, which affects the working efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a temperature control system for electronic equipment, which controls the operation of a heating unit by monitoring the temperature of the environment in which the electronic equipment is located, so as to adjust the temperature of the environment in which the electronic equipment is located so that it meets the environmental temperature requirements for the normal operation of the electronic equipment. At the same time, different power supply strategies are adopted before and after the electronic equipment starts working.

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

[0006] A temperature control system for an electronic device is provided, comprising:

[0007] power supply;

[0008] a switch electrically connected to the power source;

[0009] A heating unit is electrically connected to the switch and is used to obtain temperature information of the environment in which the electronic device is located before the electronic device starts working, and to generate heat when the temperature of the environment in which the electronic device is located is less than a temperature threshold, and to transfer the heat to the electronic device and / or the environment in which the electronic device is located through heat transfer until the temperature of the environment in which the electronic device is located is greater than or equal to the temperature threshold.

[0010] Preferably, the temperature control system of the electronic device further includes:

[0011] A device control unit is electrically connected to the heating unit and the electronic device, respectively, and is used to generate a power-on signal before the electronic device starts working and when the temperature of the environment in which the electronic device is located is greater than or equal to a temperature threshold, so that the power supply provides electrical energy to the electronic device according to the power-on signal.

[0012] Preferably, the temperature control system of the electronic device further includes:

[0013] A power management unit, which is electrically connected to the power supply, the electronic device, and the heating unit respectively;

[0014] After the electronic device starts working, the power supply provides electric energy to the electronic device through the power management unit, and after the electronic device starts working, when the temperature of the environment in which the electronic device is located is less than a temperature threshold, the power supply provides electric energy to the heating unit through the power management unit, so that the heating unit generates heat, and transfers the heat to the electronic device and / or the environment in which the electronic device is located through heat transfer until the temperature of the environment in which the electronic device is located is greater than or equal to the temperature threshold.

[0015] Preferably, the switch comprises a PMOS tube.

[0016] Preferably, the temperature threshold value ranges from -45°C to -20°C.

[0017] Preferably, the electronic equipment includes electronic components of an infrared thermal imager.

[0018] Preferably, the heating unit comprises: a heating plate and a temperature detection unit, wherein the temperature detection unit is used to obtain the temperature of the environment in which the electronic device is located, and the heating plate is used to generate heat.

[0019] Preferably, there are multiple heating plates, which are arranged at different positions.

[0020] Preferably, the temperature detection unit includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a thermistor Rt, a chip IC, a bidirectional thyristor V, a capacitor C1, a first electrolytic capacitor C2, a second electrolytic capacitor C3, a variable resistor VR1, a diode D1 and a voltage regulator diode D2;

[0021] The chip IC includes a 555 time base integrated circuit, one end of the capacitor C1 is connected to the positive power input terminal VIN+, and the other end is connected to the positive electrode of the diode D1, and the two ends of the first resistor R1 are respectively connected to the two ends of the first capacitor C1; the positive power input terminal VIN+ is also connected to the heating plate;

[0022] The cathode of the diode D1 is respectively connected to the anode of the first electrolytic capacitor C2, the cathode of the voltage stabilizing diode D2, one end of the second resistor R2, the pin 8 of the chip IC and the variable resistor VR1; the cathode of the first electrolytic capacitor C2 and the anode of the voltage stabilizing diode D2 are both connected to the negative input terminal VIN- of the power supply;

[0023] The other end of the second resistor R2 is connected to the pin 7 of the chip IC and the positive electrode of the second electrolytic capacitor C3 respectively, and the negative electrode of the second electrolytic capacitor C3 is connected to the negative power input terminal VIN-;

[0024] The two ends of the third resistor R3 are respectively connected to the pin 3 of the chip IC and the G pole of the bidirectional thyristor V, and the T1 pole and T2 pole of the G pole of the bidirectional thyristor V are respectively connected to the heating plate and the negative input terminal VIN- of the power supply;

[0025] Two ends of the thermistor Rt are respectively connected to the variable resistor VR1 and one end of the fourth resistor R4, and one end of the fourth resistor R4 is simultaneously connected to the pin 2 of the chip IC and the negative power input terminal VIN-.

[0026] Preferably, the power source comprises a rechargeable lithium battery.

[0027] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0028] The utility model controls the operation of the heating unit by monitoring the ambient temperature of the electronic equipment, so as to adjust the temperature of the environment in which the electronic equipment is located, so that the temperature requirement of the ambient temperature for normal operation of the electronic equipment is met. At the same time, different power supply strategies are adopted before and after the electronic equipment starts to work. At the same time, the temperature detection unit adopts a temperature automatic control circuit composed of a 555 time-base integrated circuit and fewer peripheral components, so that the circuit component has the advantages of low cost, small size, easy manufacture, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the temperature control system of the electronic equipment in the utility model.

[0030] Figure 2 This is a circuit diagram of the temperature detection unit in the present utility model. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0032] Example 1

[0033] like Figure 1 The present embodiment provides a temperature control system for an electronic device, which includes:

[0034] Power supply 1, in this embodiment, the power supply 1 includes a power supply unit such as a rechargeable lithium battery;

[0035] A switch 4, electrically connected to the power source 1;

[0036] The heating unit 2 is electrically connected to the switch 4 and is used to obtain temperature information of the environment in which the electronic device 100 is located before the electronic device 100 starts working, and when the temperature of the environment in which the electronic device 100 is located is less than the temperature threshold before the electronic device 100 starts working, the power supply 1 is connected through the switch 4 to receive the electric energy of the power supply 1 and generate heat, and the heat is transferred to the electronic device 100 and / or the environment in which the electronic device 100 is located through heat transfer until the temperature of the environment in which the electronic device 100 is located is greater than or equal to the temperature threshold; in this embodiment, the electronic device 100 includes electronic components of an infrared thermal imager (such as the movement of an infrared thermal imager, etc.), the temperature threshold value ranges from -45°C to -20°C, and the electronic device 100 starts working means that after the electronic device 100 is powered on, the electronic components (such as the movement of an infrared thermal imager, etc.) contained therein start working;

[0037] a device control unit 3, which is electrically connected to the heating unit 2 and the electronic device 100, and is used to generate a power-on signal before the electronic device 100 starts working and when the temperature of the environment in which the electronic device 100 is located is greater than or equal to the temperature threshold, so that the power supply 1 provides power to the electronic device 100 according to the power-on signal, so that the electronic device 100 starts working;

[0038] and a power management unit 5, which is electrically connected to the power source 1, the electronic device 100, and the heating unit 2 respectively;

[0039] After the electronic device 100 starts working, the power supply 1 provides electric energy to the electronic device 100 through the power management unit 5, and after the electronic device 100 starts working, and when the temperature of the environment in which the electronic device 100 is located is less than the temperature threshold, the power supply 1 provides electric energy to the heating unit 2 through the power management unit 5, so that the heating unit 2 generates heat, and transfers the heat to the electronic device 100 and / or the environment in which the electronic device 100 is located through heat transfer until the temperature of the environment in which the electronic device 100 is located is greater than or equal to the temperature threshold.

[0040] In this embodiment, the switch 4 includes a PMOS tube.

[0041] The working process of the temperature control system in this embodiment is as follows:

[0042] Before the electronic device 100 starts working, the power supply 1 directly supplies power to the heating unit 2 and to the power management unit 5 through the switch 4. The heating unit 2 obtains the temperature information of the environment in which the electronic device 100 is located in real time. If the temperature is greater than or equal to the temperature threshold, the device control unit 3 generates a power-on signal, and the power supply 1 supplies power to the electronic device 100 according to the power-on signal, so that the electronic device 100 starts working; if the temperature is less than the temperature threshold, the heating unit 2 works and generates heat, and transfers the heat to the electronic device 100 and / or the environment in which the electronic device 100 is located through heat transfer, until the temperature of the environment in which the electronic device 100 is located is greater than or equal to the temperature threshold, and then stops working;

[0043] After the electronic device 100 starts working, the switch 4 is disconnected, and the power supply 1 supplies power to the electronic device 100 and the heating module 2 through the power management unit 5, and the heating unit 2 also obtains the temperature information of the environment in which the electronic device 100 is located in real time. If the temperature is less than the temperature threshold, the heating unit 2 works and generates heat, and transfers the heat to the electronic device 100 and / or the environment in which the electronic device 100 is located through heat transfer, until the temperature of the environment in which the electronic device 100 is located is greater than or equal to the temperature threshold, and then stops working.

[0044] Therefore, in this embodiment, the operation of the heating unit is controlled by monitoring the ambient temperature of the electronic device to adjust the temperature of the environment in which the electronic device is located so that it meets the ambient temperature requirements for normal operation of the electronic device. At the same time, different power supply strategies are adopted before and after the electronic device starts working. That is, before the electronic device starts working, the power supply directly supplies power to the heating unit and the electronic device to quickly start the heating unit and the electronic device and improve the preheating efficiency. After the electronic device starts working, the power supply indirectly supplies power to the heating unit and the electronic device through the power management unit to avoid voltage overload caused by direct power supply, thereby ensuring that the device can work safely.

[0045] Embodiment 2:

[0046] The only difference between this embodiment and embodiment 1 is that the heating unit 2 includes a heating plate 21 and a temperature detection unit 22, wherein the temperature detection unit 22 is used to obtain the temperature of the environment in which the electronic device 100 is located in real time, and the heating plate 21 is electrically connected to the switch 4 and the power management unit 5 to generate heat, and there are multiple heating plates 21, which are arranged at different positions to achieve uniform heating.

[0047] Embodiment 3:

[0048] The difference between this embodiment and embodiment 2 is that Figure 2As shown, the temperature detection unit 22 includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a thermistor Rt, a chip IC, a bidirectional thyristor V, a capacitor C1, a first electrolytic capacitor C2, a second electrolytic capacitor C3, a variable resistor VR1, a diode D1 and a voltage regulator diode D2;

[0049] The chip IC includes a 555 time base integrated circuit; one end of the capacitor C1 is connected to the positive power input terminal VIN+, and the other end is connected to the positive electrode of the diode D1, and the two ends of the first resistor R1 are respectively connected to the two ends of the first capacitor C1; the positive power input terminal VIN+ is also connected to the heating plate 21;

[0050] The cathode of the diode D1 is respectively connected to the anode of the first electrolytic capacitor C2, the cathode of the voltage stabilizing diode D2, one end of the second resistor R2, the pin 8 of the chip IC and the variable resistor VR1; the cathode of the first electrolytic capacitor C2 and the anode of the voltage stabilizing diode D2 are both connected to the negative input terminal VIN- of the power supply;

[0051] The other end of the second resistor R2 is connected to the pin 7 of the chip IC and the positive electrode of the second electrolytic capacitor C3 respectively, and the negative electrode of the second electrolytic capacitor C3 is connected to the negative power input terminal VIN-;

[0052] The two ends of the third resistor R3 are respectively connected to the pin 3 of the chip IC and the G pole of the bidirectional thyristor V, and the T1 pole and T2 pole of the G pole of the bidirectional thyristor V are respectively connected to the heating plate 21 and the negative power input terminal VIN-;

[0053] Two ends of the thermistor Rt are respectively connected to the variable resistor VR1 and one end of the fourth resistor R4, and one end of the fourth resistor R4 is simultaneously connected to the pin 2 of the chip IC and the negative power input terminal VIN-;

[0054] Pin 1 of the chip IC is connected to the negative power input terminal VIN-;

[0055] When the temperature of the environment in which the electronic device 100 is located is lower than the temperature threshold, the resistance of the negative temperature coefficient thermistor Rt is relatively large, the potential of pin 2 of the chip IC is lower than the operating voltage, and pin 3 of the chip IC outputs a high level, triggering the bidirectional thyristor V to turn on, and further connecting the heating plate 21 for heating; when the temperature of the environment in which the electronic device 100 is located is greater than or equal to the temperature threshold, the temperature of the thermistor Rt is also greater than or equal to the set value, at which time the bidirectional thyristor V is triggered to turn off, and the heating plate 21 stops heating. When the temperature of the thermistor Rt drops to the set value again, it means that the temperature of the environment in which the electronic device 100 is located is lower than the temperature threshold again, and the bidirectional thyristor V is triggered to turn on again, and the heating plate 21 is connected for heating to achieve automatic temperature control.

[0056] Therefore, the temperature detection unit 22 can form an automatic temperature control circuit using a 555 time-base integrated circuit and fewer peripheral components. Since the voltages at each point in the circuit are derived from the same DC power supply, a high-performance voltage-stabilizing power supply is not required, and the temperature detection unit 22 can work reliably through a capacitor step-down method, which makes the temperature detection unit 22 have the advantages of low circuit component cost, small size, and easy manufacture.

[0057] In summary, the utility model controls the operation of the heating unit by monitoring the ambient temperature of the electronic device, so as to adjust the temperature of the environment in which the electronic device is located, so as to meet the ambient temperature requirements for normal operation of the electronic device. At the same time, different power supply strategies are adopted before and after the electronic device starts working, so as to improve the preheating efficiency of the startup, avoid voltage overload caused by direct power supply, and ensure that the device can work safely.

[0058] At the same time, the temperature detection unit adopts a temperature automatic control circuit composed of a 555 time-base integrated circuit and fewer peripheral components, which has the advantages of low circuit component cost, small size, and easy production.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature control system for an electronic device, characterized in that: include: power supply; a switch electrically connected to the power source; A heating unit is electrically connected to the switch and is used to obtain temperature information of the environment in which the electronic device is located before the electronic device starts working, and to generate heat when the temperature of the environment in which the electronic device is located is less than a temperature threshold, and to transfer the heat to the electronic device and / or the environment in which the electronic device is located through heat transfer until the temperature of the environment in which the electronic device is located is greater than or equal to the temperature threshold.

2. The temperature control system according to claim 1, characterized in that: The temperature control system of the electronic device further comprises: A device control unit is electrically connected to the heating unit and the electronic device, respectively, and is used to generate a power-on signal before the electronic device starts working and when the temperature of the environment in which the electronic device is located is greater than or equal to a temperature threshold, so that the power supply provides electrical energy to the electronic device according to the power-on signal.

3. The temperature control system according to claim 1, characterized in that: The temperature control system of the electronic device further comprises: A power management unit, which is electrically connected to the power supply, the electronic device, and the heating unit respectively; After the electronic device starts working, the power supply provides electric energy to the electronic device through the power management unit, and after the electronic device starts working, when the temperature of the environment in which the electronic device is located is less than a temperature threshold, the power supply provides electric energy to the heating unit through the power management unit, so that the heating unit generates heat, and transfers the heat to the electronic device and / or the environment in which the electronic device is located through heat transfer until the temperature of the environment in which the electronic device is located is greater than or equal to the temperature threshold.

4. The temperature control system according to claim 1, characterized in that: The switch includes a PMOS tube.

5. The temperature control system according to claim 1, characterized in that: The temperature threshold value ranges from -45°C to -20°C.

6. The temperature control system according to claim 1, characterized in that: The electronic equipment includes electronic components of an infrared thermal imager.

7. The temperature control system according to claim 1, characterized in that: The heating unit includes: a heating plate and a temperature detection unit, wherein the temperature detection unit is used to obtain the temperature of the environment where the electronic device is located, and the heating plate is used to generate heat.

8. The temperature control system according to claim 7, characterized in that: There are multiple heating plates, which are arranged at different positions.

9. The temperature control system according to claim 7, characterized in that: The temperature detection unit includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a thermistor Rt, a chip IC, a bidirectional thyristor V, a capacitor C1, a first electrolytic capacitor C2, a second electrolytic capacitor C3, a variable resistor VR1, a diode D1 and a voltage regulator diode D2; The chip IC includes a 555 time base integrated circuit, one end of the capacitor C1 is connected to the positive power input terminal VIN+, and the other end is connected to the positive electrode of the diode D1, and the two ends of the first resistor R1 are respectively connected to the two ends of the first capacitor C1; the positive power input terminal VIN+ is also connected to the heating plate; The cathode of the diode D1 is respectively connected to the anode of the first electrolytic capacitor C2, the cathode of the voltage stabilizing diode D2, one end of the second resistor R2, the pin 8 of the chip IC and the variable resistor VR1; the cathode of the first electrolytic capacitor C2 and the anode of the voltage stabilizing diode D2 are both connected to the negative input terminal VIN- of the power supply; The other end of the second resistor R2 is connected to the pin 7 of the chip IC and the positive electrode of the second electrolytic capacitor C3 respectively, and the negative electrode of the second electrolytic capacitor C3 is connected to the negative power input terminal VIN-; The two ends of the third resistor R3 are respectively connected to the pin 3 of the chip IC and the G pole of the bidirectional thyristor V, and the T1 pole and T2 pole of the G pole of the bidirectional thyristor V are respectively connected to the heating plate and the negative input terminal VIN- of the power supply; Two ends of the thermistor Rt are respectively connected to the variable resistor VR1 and one end of the fourth resistor R4, and one end of the fourth resistor R4 is simultaneously connected to the pin 2 of the chip IC and the negative power input terminal VIN-.

10. The temperature control system according to claim 1, characterized in that: The power source includes a rechargeable lithium battery.

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