TW201526572A - Heating system in electronic device - Google Patents

Abstract

A heating system in an electronic device is utilized for increasing an environment temperature inside the electronic device. The heating system includes a sensing module for sensing the environment temperature to generate an environment temperature value; a comparison module, coupled with the sensing module, for generating a first control signal and a second control signal according to the environment temperature value; an operation module, coupled with the comparison module, for converting a power voltage to output a heating voltage and adjusting the heating voltage according to the second control signal; a heating module, coupled with the comparison module and the operation module, for deciding whether to utilize the heating voltage to perform heating according to the first control signal for increasing the environment temperature.

Description

Heating system for electronic devices

The present invention relates to a heating system for an electronic device, and more particularly to a heating system that can elastically perform heating to increase the ambient temperature inside the electronic device without exceeding a specific power consumption.

In general, an electronic device that transmits data signals via an Ethernet network, such as an access point, a VoIP phone, or a network camera, needs to be connected to a power cord to obtain the power required for operation. Operation. Therefore, in order to solve the problem that the electronic device needs to be connected to the power line and the corresponding external power converter is extremely inconvenient, the transmission standard of the original Ethernet network IEEE 802.3 is added to the route of the Ethernet network. The related standard for transmission power, namely IEEE 802.3af or IEEE 802.3at standard, to implement the technology of Power Over Ethernet (POE). According to the standards of IEEE 802.3af or IEEE 802.3at, a complete Ethernet power supply system includes two parts: Power Sourcing Equipment (PSE) and Powered Device (PD). The power supply device is used to supply power to the power receiving device, which is the administrator of the entire Ethernet network power supply process. The power receiving device can obtain the power provided by the power supply terminal device through the RJ45 socket of the Ethernet network route. In this case, an electronic device such as a network bridge, a VoIP phone, or a network camera can be regarded as a power receiving device on the Ethernet power supply system, which obtains power through the Ethernet network and performs transmission on the Ethernet network. Related operations such as data signals or radio signals.

On the other hand, the IEEE 802.3af and IEEE 802.3at standards also specify the maximum power that can be transmitted on the Ethernet. For example, the IEEE 802.3at standard defines that the maximum power that the power supply device can provide is 25.5 watts. When the device is a powered device on the Ethernet power supply system, the power that the electronic device can obtain through the Ethernet will not exceed IEEE 802.3af or IEEE. The maximum power (eg 25.5 watts) specified by the 802.3at standard.

Therefore, when the electronic device is used in an outdoor environment with an extremely low temperature, such as an outdoor type network bridge, since the electronic components in the electronic device have a minimum operating temperature that can be normally operated, as stipulated by general electronic components. The minimum operating temperature is minus 40 degrees Celsius, so when the electronic device operates below 40 degrees Celsius, in order to ensure the normal operation of the electronic device, the conventional technology will provide a heating module inside the electronic device to perform heating. In order to increase the temperature inside the electronic device to a predetermined minimum operating temperature, the electronic components inside the electronic device can operate normally. In this case, since the electronic device of the prior art needs to simultaneously activate the heating module to perform heating, and activate the main operating circuit to perform operations such as transmitting data signals or transmitting and transmitting wireless signals, the overall power consumption of the conventional electronic device is often It will exceed the maximum power consumption that the electronic device can obtain through the Ethernet, which will cause the electronic device to malfunction.

Therefore, when the electronic device is used at an extremely low temperature and needs to be powered by the Ethernet, how to properly control the heating module to perform heating to improve the internals of the electronic device without exceeding the power consumption provided by the Ethernet. The ambient temperature, in order for the electronic device to function properly, has become one of the goals of the industry.

Accordingly, the present invention provides a heating system for an electronic device that can elastically perform heating to increase an internal ambient temperature of the electronic device without exceeding a required power consumption.

The invention discloses a heating system for an electronic device for improving an ambient temperature inside the electronic device, the heating system comprising a sensing module for sensing the ambient temperature to generate an ambient temperature value; a comparison module is coupled to the sensing module for generating a first control signal and a second control signal according to the ambient temperature value; and an operation module coupled to the comparison module for Converting a power supply voltage to output a heating voltage, and adjusting the magnitude of the outputted heating voltage according to the second control signal; and a heating module coupled to the comparison module and the operation module for The first control signal determines whether the heating voltage is used to perform heating to increase the ambient temperature.

10‧‧‧Electronic devices

100‧‧‧ heating system

110‧‧‧Main operating circuit

120‧‧‧Sensor module

122‧‧‧Comparative Module

124‧‧‧heating module

126‧‧‧Operating module

128‧‧‧Processing module

130‧‧‧Control Module

132‧‧‧ processor

134‧‧‧Storage device

TEMP‧‧‧ ambient temperature value

CON1‧‧‧ first control signal

CON2‧‧‧second control signal

Vin‧‧‧Power supply voltage

VH‧‧‧ heating voltage

VT‧‧‧ ambient voltage

V1~V2‧‧‧ input voltage

CP1~CP2‧‧‧ Comparator

R1~R10‧‧‧ resistance

Q1~Q3‧‧‧Optoelectronics

200‧‧‧DC power converter

202‧‧‧heater

210‧‧‧ input

212‧‧‧output

214‧‧‧reporting end

Vfb‧‧‧reference voltage

Ifb‧‧‧ input current

RST‧‧‧Reset signal

FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present invention.

Fig. 2 is a schematic view showing an embodiment of a heating system in the electronic device of Fig. 1.

Figure 3 is a graph of heating voltage versus time in the heating system of Figure 2.

Please refer to FIG. 1 , which is a schematic diagram of an electronic device 10 according to an embodiment of the present invention. As shown in FIG. 1, the electronic device 10 includes a heating system 100 and a main operating circuit 110. The electronic device 10 is connected to an Access Point, a VoIP phone or a network camera, and can be operated according to the IEEE 802.3af or IEEE 802.3at standard through the RJ45 socket of the connected Ethernet route. The power source to transmit data signals on the Ethernet. The main operational circuit 110 is used to perform the main operations of the electronic device 10, such as transmission signals, network switching, wireless sharing or network transmission, etc., which can utilize a single application-specific integrated circuit (ASIC). To achieve or be combined by multiple circuit modules.

The heating system 100 includes a sensing module 120, a comparison module 122, a heating module 124, and an operation module 126. Since all the electronic components in the electronic device 10 need to operate normally above the specified minimum operating temperature (eg, minus 40 degrees Celsius), the heating system 100 senses the electronic device when the electronic device 10 is used in an extremely low temperature environment. After the internal ambient temperature of 10, it is judged whether it is too low to determine whether to perform heating to increase the ambient temperature inside the electronic device 10, so that the electronic device 10 can operate normally. In addition, the heating system 100 further determines the degree of heating to be performed according to the sensed ambient temperature to determine whether to increase or decrease the power consumption required for heating, so that the electronic device 10 can not exceed the capacity of the Ethernet. At the maximum power obtained (such as the maximum power of 25.5 watts as specified by the IEEE 802.3at standard), the heating system 100 is properly operated simultaneously with the main operating circuit 110, thereby improving the ambient temperature of the electronic device 10, and not The operation of the electronic device 10 is affected by the excessive power consumption.

In detail, the sensing module 120 has a temperature sensor that can sense the interior of the electronic device 10 The ambient temperature is generated to generate an ambient temperature value TEMP and output to the coupled comparison module 122. The temperature sensor can be a temperature sensor having a thermocouple, a thermistor or other metal material components, and can be changed according to actual cost requirements without limitation. In addition, the sensing module 120 is preferably disposed in the vicinity of the main operating circuit 110 of the electronic device 10 to more accurately sense the temperature of the main operating circuit 110 during operation.

Next, the comparison module 122 compares the ambient temperature value TEMP with a predetermined temperature upper limit value VAL1 to obtain whether the ambient temperature value TEMP is greater than the temperature upper limit value VAL1, and generates a first control signal CON1 to control the heating module. 124 Whether to perform heating. The comparison module 122 can use the comparator to combine the voltage dividing resistor to compare the voltage corresponding to the ambient temperature value TEMP and the temperature upper limit value VAL1, or can also use a combination of a plurality of transistors and resistors to achieve the same. , not limited.

Specifically, the temperature upper limit value VAL1 can be appropriately set to a normal temperature value that the electronic device 10 can safely operate, so the temperature upper limit value VAL1 will be greater than the minimum operating temperature value specified by the electronic component (eg, 40 degrees Celsius minus). . When the electronic device 10 is used in an extremely low temperature environment (for example, minus 40 degrees Celsius), the initial ambient temperature value TEMP is lower than the upper temperature limit value VAL1, so the comparison module 122 measures the ambient temperature value TEMP and the upper temperature limit. After the comparison of the value VAL1, the ambient temperature value TEMP is not greater than the temperature upper limit value VAL1, and the first control signal CON1 is generated to control the heating module 124 to perform heating.

The heating module 124 is coupled to the comparison module 122 and the operation module 126, and is a resistance heater or a ceramic heater. When the heating module 124 receives the first control signal CON1 to indicate that heating needs to be performed, the heating module 124 activates the heater and heats it through the heating voltage VH outputted by the operating module 126 to increase the ambient temperature value TEMP. Then, the ambient temperature value TEMP is increased until the comparison module 122 compares to obtain the ambient temperature value TEMP greater than the temperature upper limit value VAL1. The comparison module 122 generates the first control signal CON1 to control the heating module 124 to no longer perform heating. . Finally, when the heating module 124 receives the first control signal CON1 indicating that heating is not required, the heating module 124 turns off the heater without heating.

Notably, the comparison module 122 can also generate the first control signal CON1 to control the heating module 124 to perform heating when the ambient temperature value TEMP is less than the temperature upper limit value VAL1, and when the ambient temperature value TEMP is greater than the temperature upper limit value VAL1 After a set value is added, the first control signal CON1 is generated to control the heating module 124 to no longer perform heating. Alternatively, when the ambient temperature value TEMP is greater than the temperature upper limit value VAL1, the comparison module 122 controls the heating module 124 to perform heating in addition to the first control signal CON1, and the comparison module 122 can simultaneously increase the temperature through the first control signal CON1. After the upper limit value VAL1 is such that the ambient temperature value TEMP needs to be less than the temperature upper limit value VAL1, the comparison module 122 generates the first control signal CON1 to control the heating module 124 to no longer perform heating. The first control signal CON1 is repeatedly changed due to a small change of the ambient temperature value TEMP, and the heating module 124 is repeatedly controlled to perform and not perform heating.

That is to say, when the set temperature upper limit value VAL1 is a normal temperature value that can be safely operated, when the ambient temperature value TEMP is lower than the temperature upper limit value VAL1, the comparison of the comparison module 122 can generate the first control signal CON1 to control The heating module 124 performs heating, and when the ambient temperature value TEMP is increased to be greater than the temperature upper limit value VAL1, the first control signal CON1 is generated by the comparison of the comparison module 122 to control the heating module 124 to no longer perform heating. Thereby, the electronic device 10 can make the internal ambient temperature value TEMP stably approach the normal temperature value of the safe operation and be greater than the specified minimum operating temperature value, so that the electronic device 10 is not caused by the excessive heating of the heating module 124. The ambient temperature inside the electronic device 10 is too high and is damaged.

In addition, the comparison module 122 can further compare the ambient temperature value TEMP with a predetermined one of the adjusted set values VAL2 to obtain information about whether the ambient temperature value TEMP is greater than the adjusted set value VAL2, and generate a second control signal CON2 to control the operation. Whether the module 126 adjusts the magnitude of the heating voltage VH output to the heating module 124. When the electronic device 10 is used at an extremely low temperature (for example, minus 40 degrees Celsius), the initial ambient temperature value TEMP may be lower than the adjustment set value VAL2, and the adjustment set value VAL2 may preferably be set to be slightly larger than the electronic device 10. The minimum operating temperature value (such as minus 40 degrees Celsius) specified by the electronic component causes the comparison module 122 to compare the ambient temperature value TEMP with the adjusted set value VAL2 to generate a display ambient temperature value TEMP that is not greater than the adjusted set value. The second control signal CON2 of VAL2 is to the operation module 126.

The operation module 126 includes a processing module 128 and a control module 130. The processing module 128 is coupled to the comparison module 122 and can be composed of a processor 132 and a storage device 134. The storage device 134 stores a code to instruct the processor to perform operations. When the processing module 128 receives the second control signal CON2 that is displayed as the ambient temperature value TEMP is not greater than the adjustment set value VAL2, it indicates that the ambient temperature value TEMP may be lower than the specified minimum operating temperature value and the electronic component is still not functioning properly. At this time, the processing module 128 resets the processor 132 to prevent the processor 132 from performing the operation, and the processor 132, when reset, simultaneously generates a display to increase the third control signal CON3 to the control module 130 to indicate the control. The module 130 increases the magnitude of the heating voltage VH.

The control module 130 is coupled to the processing module 128 and includes a power converter that converts a power supply voltage Vin to a heating voltage VH. Among them, the power converter can be a linear DC power converter or a switched DC power converter, etc., without limitation. When the control module 130 receives the third control signal CON3 displayed as an increase, the control module 130 controls the internal power converter to increase the heating voltage VH so that the ambient temperature value TEMP can be increased relatively quickly. Then, when the ambient temperature value TEMP is increased to be greater than the adjustment set value VAL2, the comparison module 122 compares to generate the second control signal CON2 whose display ambient temperature value TEMP is greater than the adjustment set value VAL2 to the operation module 126.

After the processing module 128 receives the second control signal CON2 that is displayed as the ambient temperature value TEMP is greater than the adjustment set value VAL2, the processing module 128 cancels the reset processor 132 to enable the processor 132 to start according to the code indication. The operation is performed, and the third control signal CON3 shown as being reduced is generated to the control module 130 to instruct the control module 130 to reduce the magnitude of the heating voltage VH. It should be noted that when the processor 132 starts to perform the operation, the processor 132 may further delay the set time by the internal counter according to the instruction of the code, and then generate the third control signal CON3 displayed as the lowering, thereby appropriately The adjustment control module 130 switches from the heating voltage VH to the lowering of the heating voltage VH to prevent the heating module 124 from being heated and the ambient temperature value TEMP is smaller than the adjustment setting value VAL2, so that the processing module 128 needs to pass through immediately. third The control signal CON3 instructs the control module 130 to switch to increase the heating voltage VH.

In other words, when the set adjustment value VAL2 is slightly larger than the minimum operating temperature value (such as minus 40 degrees Celsius) specified by the electronic component, when the ambient temperature value TEMP is not greater than the adjustment set value VAL2, the electronic device 10 transmits the comparison module. The comparison of 122 generates a second control signal CON2 to control the processing module 128 to reset the processor 132. In this case, since the main operating circuit 110 in the electronic device 10 is also reset as the processor 132 is not operated, the electronic device 10 instructs the control module 130 to increase the heating through the third control signal CON3. The magnitude of the voltage VH allows the maximum power that the electronic device 10 can obtain at the Ethernet to be supplied to the heating module 124 to perform heating to increase the heating rate.

On the other hand, when the heating module 124 performs heating such that the ambient temperature value TEMP is greater than the adjustment set value VAL2, the electronic device 10 generates the second control signal CON2 through the comparison of the comparison module 122 to control the processing module 128 to cancel the reset processing. The processor 132 will start to perform the operation and the main operating circuit 110 will also operate synchronously. In this case, in order to avoid that the heating module 124 performs heating and the main operating circuit 110 also needs to operate, the overall power consumption of the electronic device 10 exceeds the maximum power that can be obtained at the Ethernet, and the electronic device 10 The control module 130 is instructed to reduce the magnitude of the heating voltage VH through the third control signal CON3. Thereby, the maximum power that the electronic device 10 can obtain at the Ethernet can be partially supplied to the heating module 124 for heating, and the other portion is provided to the main operating circuit 110 for operation, so that the electronic device 10 can elastically perform heating. The ambient temperature and execution of the internals of the electronic device 10 can be simultaneously improved without exceeding the required power consumption.

Notably, the comparison module 122 can also generate the second control signal CON2 to control the processing module 128 to reset the processor 132 when the ambient temperature value TEMP is less than the adjustment set value VAL2, and when the ambient temperature value TEMP is greater than the adjustment setting value. After the VAL2 is added with a set value, the second control signal CON2 is generated to control the processing module 128 to cancel the reset processor 132. Alternatively, when the ambient temperature value TEMP is greater than the adjustment set value VAL2, the comparison module 122 generates the second control signal CON2, and the control control module 128 cancels the reset processor 132, and the comparison module 122 simultaneously The adjustment setting value VAL2 can be adjusted by the second control signal CON2, so that the ambient temperature value TEMP needs to be smaller than the adjustment setting value VAL2 of the adjustment, the comparison module 122 generates the second control signal CON2, and the processing module 128 resets the processor. 132. The second control signal CON2 is repeatedly changed due to a small change of the ambient temperature value TEMP, and the control module 128 is repeatedly controlled to reset and not reset the processor 132.

Briefly, the heating system 100 utilizes the comparison module 122 for the ambient temperature value TEMP (optimally set to be slightly greater than the specified minimum operating temperature value) and the temperature upper limit value VAL1 (optimally set to be safe for the electronic device 10 The normal temperature value of the operation is compared to generate a first control signal CON1 to control whether the heating module 124 performs heating, and generate a second control signal CON2 to control the operation module 126 to adjust the size of the heating voltage VH outputted to the heating module 124. . Therefore, when the ambient temperature value TEMP is less than the adjustment set value VAL2, the operation module 126 can increase the heating voltage VH to allow the heating module 124 to perform heating using all the power that the electronic device 10 can obtain, and at the ambient temperature value TEMP When the adjustment setting value VAL2 is greater than the adjustment setting value VAL2, the operation module 126 can lower the heating voltage VH to cause the heating module 124 to perform heating by using part of the power that the electronic device 10 can obtain. Furthermore, the heating module 124 performs heating using the adjusted heating voltage VH when the ambient temperature value TEMP is less than the temperature upper limit value VAL1, and the ambient temperature value TEMP is greater than the upper temperature limit value VAL1 (representing the ambient temperature value TEMP) Already too high), the heating module 124 stops heating. In this way, when the electronic device 10 is used in an extremely low temperature environment, the electronic device 10 can properly utilize the adjustment of the heating system 100 through the heating voltage VH, and elastically perform heating to make the heating module 124 and the main operating circuit 110 safe at the same time. The operation of the device does not exceed the maximum power that can be obtained by the electronic device 10, and further damage of the electronic device 10 caused by excessive heating can be avoided.

The implementation of the heating system 100 is not limited to a particular device or component, and may be implemented by related components as desired. For example, please refer to FIG. 2, which is a schematic diagram of an embodiment of the heating system 100 in the electronic device 10 of FIG. In detail, the comparison module 122 includes comparators CP1 to CP2 and resistors R4 to R9. Comparators CP1~CP2 have a positive input and a negative input respectively (indicated by '+' and '-' in Fig. 2). Positive input of comparator CP1~CP2 The terminal is coupled to the sensing module 120 and receives the ambient voltage VT output by the sensing module 120 corresponding to the ambient temperature value TEMP. Among them, when the ambient temperature value TEMP is larger, the relative ambient voltage VT is also larger. The resistors R4 to R5 are connected in series between the power supply voltage Vin and the ground. The resistor R8 is coupled between the output terminal and the negative input terminal of the comparator CP1, and the negative input terminal of the comparator CP1 is coupled to the series resistor R4. Between ~R5 and resistor R8, the input voltage V1 obtained by receiving the power supply voltage Vin and the output terminal of the comparator CP1 via the voltage dividing resistors R4 to R5 and the feedback resistor R8. The resistors R6~R7 are connected in series between the power supply voltage Vin and the ground. The resistor R9 is coupled between the output terminal and the negative input terminal of the comparator CP2, and the negative input terminal of the comparator CP2 is coupled to the series resistor R6. Between ~R7 and resistor R9, the input voltage V2 obtained by receiving the power supply voltage Vin and the output terminal of the comparator CP2 via the voltage dividing resistors R6 to R7 and the feedback resistor R9.

Therefore, according to the relationship between the ambient voltage VT and the ambient temperature value TEMP, the size of the resistors R4 to R5 can be appropriately selected so that the input voltage V1 can correspond to the temperature upper limit value VAL1, and the size of the resistors R6 to R7 can be appropriately selected for input. The voltage V2 may correspond to the adjustment set value VAL2. In this case, when the ambient voltage VT is greater than the input voltage V1, the representative ambient temperature value TEMP is greater than the temperature upper limit value VAL1, the comparator CP1 outputs the first control signal CON1 having a high potential, and the first control signal of the high potential CON1 will increase the input voltage V1 via the feedback resistor R8, so that the ambient voltage VT needs to be smaller than the increased input voltage V1, the comparator CP1 will output the first control signal CON1 with a low potential to avoid the first control signal CON1 repeatedly change. Similarly, when the ambient voltage VT is greater than the input voltage V2, the representative ambient temperature value TEMP is greater than the adjustment set value VAL2, the comparator CP2 outputs a second control signal CON2 having a high potential, and the high potential second control signal CON2 is The feedback resistor R9 increases the input voltage V2 so that the comparator CP2 outputs the second control signal CON2 with a low potential when the ambient voltage VT needs to be smaller than the input voltage V2.

The heating module 124 includes a heater 202 and a transistor Q2. The heater 202 may be a resistive heater or a ceramic heater or the like, and is not limited. One end of the heater 202 is coupled to the control module 130, and can receive the heating voltage VH output by the control module 130, and the heater 202 The other end is coupled to the drain of the transistor Q2. The source of the transistor Q2 is grounded, and the gate of the transistor Q2 is coupled to the comparator CP1 to receive the first control signal CON1 output by the comparator CP1. When the gate of the transistor Q2 receives the first control signal CON1 having a high potential, the transistor Q2 is turned on, so that both ends of the heater 202 can have a voltage difference (ie, the heating voltage VH), and heating is started. When the gate of the transistor Q2 receives the first control signal CON1 having a low potential, the transistor Q2 is turned off, so that the heater 202 does not have a voltage difference at both ends without heating. Therefore, when the ambient temperature value TEMP is greater than the temperature upper limit value VAL1, the heating module 124 receives the first control signal CON1 having a high potential without heating, and when the ambient temperature value TEMP is not greater than the temperature upper limit value VAL1, The heating module 124 receives the first control signal CON1 having a low potential for heating.

The processing module 128 includes a processor 132, a storage device 134, a resistor R10, and a transistor Q3. The drain of the transistor Q3 is coupled to the resistor R10 and then connected in series to the power supply voltage Vin. The source of the transistor Q3 is grounded, and the gate of the transistor Q3 is coupled to the comparator CP2 to receive the output of the comparator CP2. Two control signals CON2. When the gate of the transistor Q3 receives the second control signal CON2 with a high potential, the transistor Q3 is turned on, so that the reset signal RST outputted by the drain of the transistor Q3 is low. When the processor 132 is coupled to the drain of the transistor Q3 and receives the reset signal RST with a low potential, the processor 132 is reset without performing the operation, and the processor 132 generates a high potential under the reset. The third control signal CON3 is to the control module 130. In addition, when the processor 132 receives the reset signal RST with a high potential, the processor 132 starts to perform an operation according to the instruction of the code in the storage device 134, and generates a third control signal CON3 of a low potential.

The control module 128 includes a DC power converter 200, resistors R1 R R3, and a transistor Q1. The DC power converter 200 receives the power supply voltage Vin from the input terminal 210 and outputs the heating voltage VH to the output terminal 212. The feedback terminal 214 of the DC power converter 200 is coupled between the resistors R2 R R3, and the DC power converter 200 is connected. The magnitude of the output heating voltage VH is adjusted according to the magnitude of the input current Ifb of the feedback terminal 214. The resistors R2 R R3 are connected in series between the output terminal 212 and the ground. One end of the resistor R1 is coupled to the drain of the transistor Q1, and the other end is coupled between the resistors R2 and R3. The source of the transistor Q1 is grounded, and the gate of the transistor Q1 is coupled to the processor 132 to receive the third control signal CON3 output by the processor 132.

Therefore, when the ambient temperature value TEMP is not greater than the adjustment set value VAL2 (representing that the electronic component in the electronic device 10 is still not operational), when the gate of the transistor Q1 receives the third control signal CON3 with a high potential, the transistor Q1 will turn on, causing resistors R1~R2 to form shunt resistors. Since the feedback terminal 214 has a reference voltage Vfb as a fixed value, the magnitude of the input current Ifb of the feedback terminal 214 is the reference voltage Vfb divided by the parallel resistance formed by the resistors R1 R R2 to improve the DC power converter 200. The magnitude of the heating voltage VH. In addition, when the ambient temperature value TEMP is greater than the adjustment set value VAL2 (representing that the electronic component in the electronic device 10 can perform operation), the gate of the transistor Q1 receives the third control signal CON3 with a low potential, and the transistor Q1 is turned off, so that The resistor R1 does not form a parallel resistance with the resistor R2, and the magnitude of the input current Ifb becomes the reference voltage Vfb divided by the resistor R2. In this case, since the resistance of the resistor R2 is larger than the resistance of the parallel resistor formed by the resistors R1 to R2, the input current Ifb is relatively small, so that the DC power converter 200 reduces the output heating voltage VH. the size of.

Briefly, in this embodiment, the comparison module 122 compares the ambient voltage VT corresponding to the ambient temperature value TEMP with the input voltage V1 and the input voltage V2 by using the comparators CP1~CP2 to generate the first control signal CON1. And a second control signal CON2. Therefore, when the ambient temperature value TEMP is less than the adjustment set value VAL2, the control module 128 receives the third control signal CON3 with a high potential generated by the processor 132 to increase the magnitude of the heating voltage VH to utilize the energy. Get all the power to perform the heating. When the ambient temperature value TEMP is greater than the adjustment set value VAL2, the control module 128 receives the third control signal CON3 with a low potential generated by the processor 132 to reduce the magnitude of the heating voltage VH to utilize a portion of the power that can be obtained. To perform the heating. In this way, through the operation of the heating system 100 in this embodiment, the electronic device 10 can adjust the heating voltage VH to perform the heating elastically, so that the heating module 124 and the main operating circuit 110 can operate simultaneously and do not exceed the available The maximum power, which in turn allows the electronic device 10 to function properly.

On the other hand, please refer to Figure 3, and Figure 3 is the heating system 100 of Figure 2. A plot of thermal voltage VH versus time. As shown in FIG. 3, the electronic device 10 is used at an extremely low temperature between time points t0 and t1, and the ambient temperature value TEMP is smaller than the adjustment set value VAL2. Therefore, the magnitude of the heating voltage VH is caused by the processor 132. The third control signal CON3 having a high potential generated by the reset is increased. Until the heating module 124 performs heating until the ambient temperature value TEMP is greater than the adjustment set value VAL2, that is, between the time points t1 and t2, the magnitude of the heating voltage VH is generated by the processor 132 to generate a third control signal with a low potential. Reduced by CON3. Therefore, between the time points t1 and t2, the adjustment of the heating voltage VH of the electronic device 10 allows the heating module 124 to operate simultaneously with the main operating circuit 110 and does not exceed the required overall power consumption, so the electronic device 10 can Continued heating also works.

Specifically, the present invention is used in the electronic device 10 to sense the ambient temperature inside the electronic device 10 by using the heating system 100 and generate the ambient temperature value TEMP, and then to the ambient temperature value TEMP and the temperature upper limit value VAL1 and the adjustment set value VAL2. Comparing to determine whether to heat the electronic device 10 and determine the degree of heating required, so that the electronic device 10 can perform heating elastically so that the heating module 124 operates simultaneously with the main operating circuit 110 and does not exceed the capabilities of the electronic device 10. The maximum power obtained is subject to modification or variation by those of ordinary skill in the art. For example, in the embodiment, after receiving the second control signal CON2 output by the comparison module 122, the processing module 128 determines whether to reset the processor 132 to generate a third control signal CON3 by using the processor 132. Whether the control module 130 adjusts the heating voltage VH. In other embodiments, after receiving the second control signal CON2 outputted by the comparison module 122, the processing module 128 can directly instruct the control module 130 to adjust the heating voltage VH through the second control signal CON2. The control signal is generated by the processor 132, that is, directly controlled by the hardware circuit.

Furthermore, in the embodiment, after the processor 132 starts the operation, the third control signal CON3 is generated according to the second control signal CON2 directly or after a predetermined time delay to indicate whether the control module 130 adjusts the heating voltage VH. However, in other embodiments, after the processor 132 starts to perform operations, in addition to the second control signal CON2, the third control signal CON3 may be generated by referring to other set values or referring to the power consumption value of the main operating circuit 110. Indication control module 130 Whether to adjust the heating voltage VH. In addition, in this embodiment, according to the magnitude of the heating voltage VH to be output, whether the two resistors appropriately designed in the control module 130 are used to determine whether to connect in parallel to control the feedback current of the DC power converter 200 to adjust the heating voltage. The size of the VH. In other embodiments, the control module 130 can also adjust the heating voltage VH through a voltage dividing resistor in combination with a related power converter, or adjust the heating voltage VH through other boosting power converters. Change is not limited.

In summary, in the prior art, the electronic device needs to perform heating and perform the operation of transmitting data signals or transmitting and transmitting wireless signals. Therefore, the overall power consumption of the electronic device often exceeds that of the electronic device through the Ethernet. The maximum power consumption, which in turn causes the electronic device to malfunction. According to the present invention, the heating system 100 determines whether to heat the electronic device 10 and determine the degree of heating required by comparing the ambient temperature value TEMP with the temperature upper limit value VAL1 and the adjustment set value VAL2, so that the electronic device 10 can perform the heating elastically. Increase the ambient temperature inside the electronic device without exceeding the required power consumption.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧Electronic devices

100‧‧‧ heating system

110‧‧‧Main operating circuit

120‧‧‧Sensor module

122‧‧‧Comparative Module

124‧‧‧heating module

126‧‧‧Operating module

128‧‧‧Processing module

130‧‧‧Control Module

132‧‧‧ processor

134‧‧‧Storage device

TEMP‧‧‧ ambient temperature value

CON1‧‧‧ first control signal

CON2‧‧‧second control signal

Vin‧‧‧Power supply voltage

VH‧‧‧ heating voltage

Claims (10)

A heating system for an electronic device for improving an ambient temperature inside the electronic device, the heating system comprising: a sensing module for sensing the ambient temperature to generate an ambient temperature value; The comparison module is coupled to the sensing module for generating a first control signal and a second control signal according to the ambient temperature value; and an operation module coupled to the comparison module for converting a power supply voltage for outputting a heating voltage, and adjusting the magnitude of the heating voltage to be output according to the second control signal; and a heating module coupled to the comparison module and the operation module for The first control signal determines whether the heating voltage is used to perform heating to increase the ambient temperature. The heating system of claim 1, wherein when the ambient temperature value is greater than a first temperature upper limit, the first control signal generated by the comparison module is used to control the heating module not to perform heating, and When the ambient temperature value is not greater than a second temperature upper limit, the first control signal generated by the comparison module is used to control the heating module to perform heating. The heating system of claim 1, wherein the second control signal generated by the comparison module is used to control the operation module to reduce the output of the heating when the ambient temperature value is greater than a first adjustment setting value. The magnitude of the voltage, and when the ambient temperature value is not greater than a second adjustment setting, the second control signal generated by the comparison module is used to control the operation module to increase the magnitude of the heating voltage outputted. The heating system of claim 1, wherein the comparison module comprises a comparator circuit for determining the magnitude of the ambient temperature value to generate the first control signal and the second control signal. The heating system of claim 1, wherein the operation module comprises: a processing module coupled to the comparison module for generating a third control signal according to the second control signal; A control module is coupled to the processing module for converting the power voltage to output the heating voltage, and adjusting the heating voltage according to the third control signal. The heating system of claim 5, wherein the processing module comprises: a storage device storing a code; and a processor for receiving the second control signal displayed as being lowered The device is reset and generates the third control signal for controlling the control module to reduce the magnitude of the heating voltage, and when receiving the second control signal displayed as being enhanced, the processor performs operation according to the program The instruction of the code generates the third control signal for controlling the control module to increase the magnitude of the heating voltage. The heating system of claim 5, wherein the processing module performs the operation according to the instruction of the code, and the processing module generates the third control signal after delaying for a set time according to the second control signal. The heating system of claim 5, wherein the control module further comprises a power converter for converting the power voltage to output the heating voltage, and when the control module receives the third control displayed as decreasing The control module controls the power converter to reduce the magnitude of the output voltage outputted, and the control module controls the power converter when the control module receives the third control signal displayed for improvement The magnitude of the heating voltage outputted is increased. The heating system of claim 5, wherein the control module comprises: a first transistor, comprising a first end, a second end, and a control end, the first end being coupled to a ground end, The control terminal is coupled to the processing module for receiving the third control signal. The first resistor includes a first end and a second end. The first end is coupled to the first transistor. a second end, a second end, the first end is coupled to the ground end, the second end is coupled to the second end of the first resistor; The third resistor includes a first end and a second end, and the first end is coupled to the first electric Blocking between the second end and the second end of the second resistor; and the DC power converter includes an input end, an output end, and a feedback end, the input end is configured to receive the power supply voltage, The output end is coupled to the second end of the third resistor for outputting the heating voltage, and the feedback end is coupled to the second end of the first resistor, the second end of the second resistor, and Between the first ends of the third resistor, the DC power converter adjusts the magnitude of the output voltage according to the input current of one of the feedback terminals. The heating system of claim 1, wherein when the heating module receives the first control signal indicating that heating is not performed, the heating module does not perform heating, and when the heating module receives an instruction to perform heating The heating module performs heating when the first control signal is applied.