TW201737576A - Power plug and outlet with smart thermal protection - Google Patents

Abstract

The present disclosure provides a power plug and an outlet with smart thermal protection comprising a current sensor unit, a first temperature sensor unit, a second temperature sensor unit and a control unit. The current sensor unit senses the conducted current. The first temperature sensor unit disposed in the housing detects a temperature of a conductive sheet. The second temperature sensor unit senses environment temperature. The control unit is coupled to the current sensor unit, the first temperature sensor unit, the second temperature sensor unit and a controllable switch. The controllable switch electrically connects with the power feeding conductor in series. The control unit determines whether the temperature of the conductive sheet detected by the first temperature sensor unit is over temperature according to the sensed current and the environment temperature. When the temperature of the conductive sheet is over temperature, the control unit cuts off the controllable switch for turning off the current.

Description

Power plug and socket with intelligent thermal protection mechanism

The invention relates to an over temperature protection device, and in particular to a power plug and socket with an intelligent thermal protection mechanism.

Devices such as power plugs, sockets, and extension cord sockets can transfer external power sources (such as AC power) to powered electronic devices. For safety reasons, each device should have safety specifications such as the upper limit of the current that can be transmitted. In the actual product, there will also be an over-temperature protection mechanism. The conventional technology uses a temperature sensor and cooperates with an over-temperature shutdown mechanism. For example, a fuse or a returnable power-off switch can generally be used and connected in series to the power line for control of over-temperature protection. For example, when the power plug and the socket are not properly inserted, or the load of the power plug or the external socket is too high, the temperature of the conductive line (and component) continues to rise above a preset temperature (for example, 80 ° C to 100 ° C). Then use a fuse or a power-off switch to disconnect the current, thereby preventing the power plug or socket from overheating or the wire from igniting.

However, traditionally, by the preset temperature sensing, the upper limit of the safe temperature is usually a fixed temperature, and other factors, such as the ignition temperature of the environmental dust, which may not have reached the conventional protection temperature, may have been ignited. Such monotonous over-temperature safety design, the actual over-temperature protection effect can be limited, there is still considerable room for improvement.

The embodiment of the invention provides a plug and socket with intelligent thermal protection mechanism (Plug & Outlet), which provides over-temperature protection for plugs and sockets. This over-temperature protection mechanism is a dynamic protection mechanism to improve the safety of plugs and sockets.

Embodiments of the present invention provide a power plug having an intelligent thermal protection mechanism, including a current sensing unit, a first temperature sensing unit, a second temperature sensing unit, a switch, and a control unit. The current sensing unit senses the current flowing through the conductive pins of the power plug. The first temperature sensing unit is disposed inside the casing of the power plug, and the temperature of the conductive pin is measured. The second temperature sensing unit measures the ambient temperature. The control unit is coupled to the current sensing unit, the first temperature sensing unit, the second temperature sensing unit, and the controllable switch. The controllable switch is electrically connected in series to the conductive pin. The control unit determines whether the temperature of the conductive pin measured by the first temperature sensing unit is over temperature according to the current of the conductive pin measured by the current sensing unit and the ambient temperature measured by the second temperature sensing unit. When the temperature of the conductive pin is judged to be over temperature, the control unit turns off the switch to turn off the current flowing through the conductive pin.

Embodiments of the present invention provide a power socket having an intelligent thermal protection mechanism, including a current sensing unit, a first temperature sensing unit, a second temperature sensing unit, a switch, and a control unit. The current sensing unit senses the current flowing through the feed conductor of the power outlet. The first temperature sensing unit is disposed inside the casing of the power socket, and the temperature of the feeding conductor is measured. The second temperature sensing unit senses the ambient temperature. The control unit is coupled to the current sensing unit, the first temperature sensing unit, the second temperature sensing unit, and the controllable switch. The controllable switch is electrically connected in series to the conductive pin. The control unit determines whether the temperature of the feed conductor measured by the first temperature sensing unit is over temperature according to the current of the feed conductor measured by the current sensing unit and the ambient temperature measured by the second temperature sensing unit. When the temperature of the feed conductor is judged to be over temperature, the control unit turns off the switch to turn off the current flowing through the feed conductor.

In summary, the embodiment of the present invention provides a plug and socket with an intelligent thermal protection mechanism, which can dynamically determine a feed conductor (such as a conductive pin according to the condition of the housing or the external ambient temperature and the current current). Or the temperature limit of the power cord can be adapted to the ambient temperature to provide a more accurate current overtemperature protection mechanism.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

1‧‧‧Power plug

11‧‧‧ Current sensing unit

12‧‧‧First temperature sensing unit

13‧‧‧Second temperature sensing unit

14‧‧‧Control unit

Iac, I _a , I _b , I _c , I ₁ ‧‧‧ current

15‧‧‧Controllable switch

16‧‧‧ socket

161‧‧‧Conductor

17, 191‧‧‧ conductive pins

18, 18’‧‧‧ shell

T _th , T _2a , T _2b , T _2c ‧‧‧ temperature threshold

E_T, T _1a , T _1b , T _1c ‧‧‧ ambient temperature

1'‧‧‧Power Socket

19‧‧‧Power plug

L ₁ , L ₂ ‧‧‧ wires

S110, S120, S130, S140, S150, S160‧‧ steps

FIG. 1A is a schematic diagram of a power plug with an intelligent thermal protection mechanism according to an embodiment of the present invention.

FIG. 1B is a functional block diagram of a power plug with an intelligent thermal protection mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a determination process of an intelligent thermal protection mechanism according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of a dynamic temperature threshold corresponding to a first temperature and an on current according to an embodiment of the invention. FIG.

FIG. 3B is a schematic diagram of the case where the same on-current is applied in FIG. 3A.

Figure 3C is a schematic illustration of the application of Figure 3A at the same first temperature.

4A is a schematic diagram of a dynamic temperature threshold corresponding to a first temperature provided by an embodiment of the present invention.

FIG. 4B is a schematic diagram of a dynamic temperature threshold corresponding to an on current according to an embodiment of the invention.

FIG. 5 is a schematic diagram of a power socket with an intelligent thermal protection mechanism provided by an example of the present invention.

[Embodiment of power plug and socket with intelligent thermal protection mechanism]

The power plug and socket with the intelligent thermal protection mechanism of this embodiment may be a power extension device such as a plug, a socket, a power extension cord or a charging device. It can receive external power (such as AC power) and transmit it to other electronic devices that need electricity (hereinafter referred to as power devices). The following will be explained in the actual embodiment, and the following embodiments will be demonstrated The power plug and the power extension cord socket are taken as an example to help illustrate, but the invention does not limit the appearance and application of the power plug and socket with intelligent thermal protection mechanism.

Please refer to FIG. 1A and FIG. 1B simultaneously. FIG. 1A is a schematic diagram of a power plug with an intelligent thermal protection mechanism according to an embodiment of the present invention, and FIG. 1B is a functional block diagram of a power plug with an intelligent thermal protection mechanism according to an embodiment of the present invention. . In terms of appearance, as shown in FIG. 1A, the power plug 1 having an intelligent thermal protection mechanism has a socket 16, at least two conductive pins 17, and a housing 18. The conductive pin 17 is used to connect an external power source, such as a commercial power outlet. The number and structure of the conductive pins 17 are correspondingly arranged corresponding to the socket of the external power source. For example, the power plug 1 has two conductive pins 17 respectively corresponding to the live line (L) and the neutral line (N) of the mains; or The plug 1 has three conductive pins 17, which correspond to the live line (L), the neutral line (N) and the ground line (G) of the mains, respectively, but the invention is not limited thereto. Then, the jack 16 can be used to connect a power plug of an electric device (not shown) to output power to the electric device. The jack of the socket 16 has a conductive piece (usually a conductive copper piece) to correspond to the conductive pin 17 . Wires (L), neutral (N) and ground (G) are wired, but the invention does not limit the number and structure of the sockets of the socket 16. FIG. 1A is only for illustration to help explain, and has the technical field. Generally, the knowledge base can design other forms of power plugs according to the above principles.

In addition, as shown in FIG. 1B, the power plug 1 with the intelligent thermal protection mechanism of the present embodiment includes a current sensing unit 11, a first temperature sensing unit 12, and a second temperature sensing unit 13. The controllable switch 15 and the control unit 14. The control unit 14 is coupled to the current sensing unit 11, the first temperature sensing unit 12, the second temperature sensing unit 13, and the controllable switch 15. Control unit 14 is not shown in Figure 1A. The control unit 14 is, for example, a microcontroller (MCU) or a central processing unit (CPU), but the invention is not limited thereto. The controllable switch 15 is electrically connected in series to a conductive pin 17 to control whether the conductive pin 17 can conduct current generated by an external power source, such as the current Iac of FIG. 1B. The conductive pin 17 described herein corresponds to, for example, The live wire (L) or neutral wire (N) of the mains, not the conductive pin of the corresponding ground wire (G), because the ground wire (G) is normal. Current is generated.

Next, referring to FIG. 2, FIG. 2 is applied to help illustrate the concept of the intelligent thermal protection mechanism of the embodiment of the present invention. The judging mechanism can be implemented by the aforementioned power plug 1 having an intelligent thermal protection mechanism. First, in step S110, a current is sensed, for example, a current of the conductive pin 17, as shown in FIG. 1A. Then, in step S120, the temperature of the conductive pin 17 is sensed. Next, in step S130, the ambient temperature is sensed. Then, it is judged whether or not the temperature is excessive, and can be calculated, for example, by using a look up table or by using a formula (function). When it is determined that the temperature has not been exceeded, the process proceeds to step S150, and the control unit 14 does not operate. When it is determined that the temperature is too high, step S160 is performed, and the control unit 14 opens the controllable switch 15 to disconnect the current flowing through the conductive pin 17.

Based on the above-described determination mechanism, reference is again made to FIGS. 1A and 1B to illustrate details of an exemplary embodiment. In detail, the conductive pin 17 is electrically connected to the conductive piece of one of the sockets of the socket 16 via the controllable switch 15, the controllable switch 15 is controlled by the control unit 14, and the temperature of the conductive pin 17 is judged to be over temperature at the control unit 14. At this time, the controllable switch 15 is turned off to turn off the current Iac, whereby the power transmission between the power plug 1 and the external power source (and the electric device) can be cut off. The controllable switch 15 can be a relay or an electronic switch, but the invention does not limit the implementation of the controllable switch 15. How the control unit 14 determines whether the temperature of the conductive pin 17 is over temperature will be described below.

The current sensing unit 11 senses the current flowing through the conductive pin 17 of the power plug 1, and the conductive pin 17 described herein is, for example, a live line (L) or a neutral line (N) corresponding to the mains, instead of correspondingly The conductive pin of the wire (G) has no current due to the normal ground wire (G). In practical applications, the conductive pin 17 having a conducting current is, for example, a copper piece. The current sensing unit 11 is, for example, a Hall effect current sensor, but the present invention is not limited thereto. Those skilled in the art should readily understand how to sense current using conventional techniques, and will not be described again. The current flowing through the conductive pin 17 of the power plug 1 is one of the basis for judging whether the temperature of the conductive pin 17 is over temperature, and the other is based on the ambient temperature measured by the second temperature sensing unit 13.

The first temperature sensing unit 12 is disposed on the housing 18 of the power plug 1 to measure the guide The temperature of the electrical pin 17. In an embodiment, the first temperature sensing unit 12 may be disposed inside the housing 18 . The first temperature sensing unit 12 may be disposed at a position in contact with or adjacent to the conductive pin 17. The manner in which the first temperature sensing unit 12 senses the temperature of the conductive pin 17 may be contact or non-contact. In an embodiment, the first temperature sensing unit 12 can contactly sense the temperature of the conductive pin 17 to generate a more accurate temperature, for example, the first temperature sensing unit 12 is a thermal resistor or a thermocouple, but the present invention The manner in which the first temperature sensing unit 12 senses the temperature of the conductive pin 17 is not limited.

The second temperature sensing unit 13 senses the ambient temperature. The ambient temperature of the second temperature sensing unit 13, for example, can sense the temperature of the housing 18, where the measured ambient temperature is the temperature of the housing 18 itself, but the invention is not so limited. The temperature of the housing 18 may reflect the ambient temperature outside of the power plug 1, but the temperature of the housing 18 does not have to be the same as the ambient temperature. In another embodiment, when the second temperature sensing unit 13 is disposed on the surface of the housing 18, the actually measured ambient temperature may be closer to the external ambient temperature. The control unit 14 determines the conductive pin 17 measured by the first temperature sensing unit 12 according to the current of the conductive pin 17 measured by the current sensing unit 11 and the ambient temperature measured by the second temperature sensing unit 13. Is the temperature too warm? When the temperature of the conductive pin 17 is judged to be over temperature, the control unit 14 turns off the controllable switch 15 to turn off the current flowing through the conductive pin 17 (such as the current Iac of FIG. 1B). In short, the condition for judging whether the temperature is over-temperature is based on the current and the ambient temperature, and the temperature of the conductive pin 17 (such as a copper piece) is sensed by the first temperature sensing unit 12 to determine whether the temperature of the copper piece is With reasonable temperature rise, this intelligent thermal protection mechanism is a dynamic over-temperature judgment mechanism.

Furthermore, the intelligent thermal protection mechanism used in the embodiments of the present invention obtains a temperature threshold (T _th ) based on the on current (I) and the ambient temperature (E_T), and the dynamic temperature threshold (T _{th )} ) is a function of the on current (I) and the ambient temperature (E_T) and can be expressed as T _th (I, E_T). For example, a temperature threshold (T _th ) can be obtained using a look up table or using the control unit 14 to perform calculations. When the over temperature determination mechanism is implemented by a lookup table, the control unit 14 may store a lookup table, and the control unit 14 compares the current of the conductive pin 17 with the ambient temperature (E_T) against the lookup table to obtain a temperature threshold (T _th ). This temperature threshold (T _th ) is a dynamic temperature limiting condition. Referring to FIG. 3A, FIG. 3A is a schematic diagram of a dynamic temperature threshold corresponding to ambient temperature (E_T) and a conducting current (I) according to an embodiment of the present invention. The horizontal axis is the conducting current (I), and the vertical axis is the environment. Temperature (E_T) (which can represent the case temperature or ambient temperature), each preset temperature threshold T _2a , T _2b , T _2c determines a dynamic temperature limit condition, such as the temperature threshold T _2a , T _{2b in} Figure 3A And T _2c each correspond to a line (which may be a curve or a straight line) representing a dynamic temperature limiting condition, where T _2c > T _2b > T _2a . However, the dynamic temperature limiting conditions of the present invention are not limited to the example of FIG. 3A, and FIG. 3A is only for assistance in explanation. Referring to FIG 3B, when the current I is fixed to the case where I _1, when the ambient temperature is higher E_T (changed from T _1a to T _1b, and then changed to the T _1c) the threshold temperature T _th higher (by the T _2a Change to T _2b and change to T _2c ). Referring again to FIG. 3C, when the ambient temperature E_T is constant, it is known that the higher the current (from I _a to I _b and then to I _c ), the higher the temperature threshold T _th (changed by T _{2a )} To T _2b , change to T _2c ). The dynamic temperature limiting conditions described above can be stored in a lookup table, and the control unit 14 can quickly find the temperature threshold T _th simply by means of a look-up table.

The data storage content of the lookup table can also be represented as shown in FIG. 4A or FIG. 4B. In FIG. 4A, the value of each current I produces a curve (or a straight line), the horizontal axis is the ambient temperature E_T, and the vertical axis is the temperature. The threshold value T _th , each current value (such as 5A, 10A or 20A) corresponding to the ambient temperature E_T, can obtain the temperature threshold T _th , so the above table can be stored in a lookup table. When the current I is known (e.g., 5A, 10A or 2OA), increases as the ambient temperature E_T, the threshold temperature T _th may vary with the ambient temperature rises. As shown in FIG. 4B, the value of each ambient temperature E_T produces a curve (or a straight line), the horizontal axis is the current I, and the vertical axis is the temperature threshold T _th , and each ambient temperature E_T (eg, 50 ° C, 40 ° C, 30 ° C or 20 ° C) corresponds to a current value, then the temperature threshold T _th can be obtained, so the above data can be stored in a lookup table. When the ambient temperature E_T is known (eg, 50 ° C, 40 ° C, 30 ° C, or 20 ° C), as the current I increases, the temperature threshold T _th also rises. Through the above, it should be understood that the dynamic temperature limiting condition (or temperature threshold T _th ) of the embodiment of the present invention stores the manner of the lookup table and the content of the data. However, the present invention does not limit the manner of obtaining the temperature threshold value T _th (I, E_T) and the content of the lookup table as long as it is a temperature threshold obtained by looking up the current (I) and the ambient temperature (E_T). _Tth is a category of embodiments of the present invention. It can be seen from the above that the temperature interval between the ambient temperature E_T and the temperature threshold T _th measured by the second temperature sensing unit 13 is a dynamic temperature limiting interval. In other words, the first temperature sensing unit 12 senses that the temperature of the conductive pin 17 between the ambient temperature E_T and the temperature threshold T _th indicates that no over temperature condition has occurred, and the over temperature of the embodiment of the present invention The judgment mechanism is not limited to any one of the preset absolute temperature values, such as 80 ° C or 100 ° C. The temperature threshold value T _th of the embodiment of the present invention dynamically increases and decreases with the current (I) and the ambient temperature E_T measured by the second temperature sensing unit 13. Therefore, the over temperature determination method of the embodiment of the present invention can increase the reliability of the over temperature determination compared to the conventional method of determining the absolute temperature.

In another embodiment, when the temperature threshold (T _th ) is obtained by the control unit 14 based on the current (I) and the ambient temperature (E_T), the dynamic temperature threshold T _th (I, E_T) is obtained. The current (I) and the ambient temperature (E_T) are used as a function of the variable, and the functional formula can be stored in the control unit 14, when the current (I) is known, and the ambient temperature (E_T) is known, bringing the two into A dynamic temperature threshold value T _th can be obtained by a functional formula of the temperature threshold T _th (I, E_T). However, the present invention does not limit the function content of the temperature threshold value T _th (I, E_T), as long as the temperature threshold value T _th obtained by calculating based on the current (I) and the ambient temperature (E_T) belongs to the implementation of the present invention. The scope of the example.

Further, when it is determined that the temperature is too high, the control unit 14 may further generate a state abnormality indication by using an abnormality indicating unit (not shown), and the abnormality indicating unit may utilize, for example, a light emitting diode, a light emitting diode display, or A buzzer or the like that can generate an acousto-optic signal, and even the abnormality indicating unit can transmit an abnormality indicating signal to other electronic devices to provide an abnormality notification, but the present invention is not limited thereto. The above abnormality indication is merely an example, and the present invention does not limit the content and implementation of the abnormality indication generated by the control unit 14.

Next, please refer to FIG. 1A, FIG. 1B and FIG. 5 simultaneously. FIG. 5 is a schematic diagram of a power socket with an intelligent thermal protection mechanism according to an example of the present invention. Different from the form of the power plug 1 of FIG. 1A, FIG. 5 is a power socket 1' having an intelligent thermal protection mechanism based on the principle of the functional block of FIG. 1B, which is an extension cord socket. The power socket 1' includes the current sensing unit 11, the first temperature sensing unit 12, the second temperature sensing unit 13, the controllable switch 15, and the control unit 14 of FIG. 1B. The control unit 14 is coupled to the current sensing unit 11, the first temperature sensing unit 12, the second temperature sensing unit 13, and the controllable switch 15. Control unit 14 is not shown in FIG. In addition to this, the power socket 1' also has a power plug 19 and a socket 16, which are connected by a feed conductor and electrically connected in series with the feed conductor using a controllable switch 15. The feed conductor is a conductive element that transmits current, such as a wire L ₁ and an associated conductive element connected to the live wire (L), or a wire L ₂ and an associated conductive component corresponding to the neutral wire (N). In the embodiment of FIG. 5, the feed conductor includes a power source electrically connected to each other (input) plug of conductive pins 19119, wire L ₁ (or L ₂₎ and a power (output) receptacle 161 of the conductive sheet 16 . The power plug 19 also includes at least two conductive pins 191 (corresponding to a live wire (L) or a neutral wire (N)). Each of the conductive pins 191 is connected to a power supply wire. For example, the wire L ₁ corresponds to a live wire (L), and the wire L ₂ Corresponding to the zero line (N). The current sensing unit 11 senses the current flowing through the feed conductor of the power outlet 1'. Unlike the design of FIG. 1A, current sensing unit 11 may not necessarily be located in the power plug 19 'but power receptacle 1' housing 18 ', and the current sensing unit 11 sense leads L ₁ (or L ₂₎ current As shown in FIG. 5, the present invention is not limited thereto. In still another embodiment, similar to the design of the power plug 1 of FIG. 1A, the current sensing unit 11 of the power socket 1' may also be disposed at the power plug 19, and the current sensing unit 11 senses the flow through the power plug 19. The current of the conductive pin 191.

The first temperature sensing unit 12 is disposed inside the housing 18' of the power socket 1' to sense the temperature of the feed conductor. In an embodiment, the first temperature sensing unit 12 is configured to contact (or be adjacent to) the wire L ₁ (or L ₂ ) to sense the temperature of a predetermined position on the wire L ₁ (or L ₂ ), but The invention is not limited thereby. In still another embodiment, similar to the design of the power plug 19 of FIG. 1A, the first temperature sensing unit 12 of the power socket 1' may be disposed on the power plug 19, and the first temperature sensing unit 12 senses the power plug 19 The temperature of the conductive pin 191. The second temperature sensing unit 13 is disposed in the housing 18' of the power socket 1', and measures an ambient temperature (E_T), which may be an ambient temperature of the housing 18' or an external ambient temperature.

Then, the control unit 14 determines the current temperature (I) of the feed conductor measured by the current sensing unit 11 and the ambient temperature (E_T) measured by the second temperature sensing unit 13 to determine the first temperature sensing unit 12 to measure. The temperature of the resulting feed conductor (for example, the conductive pin 191 corresponding to the live (L) or neutral (N) of the mains) is over temperature. When the temperature of the feed conductor is judged to be over temperature, the control unit 14 turns off the controllable switch 15 to turn off the current (I) flowing through the feed conductor. The control unit 14 determines whether the temperature of the feed conductor is over temperature based on the dynamic temperature threshold (T _th ). The manner in which the control unit 14 obtains the temperature threshold (T _th ) may be implemented using a lookup table or by calculation. In an embodiment, the control unit 14 stores a lookup table, and the control unit 14 compares the current (I) of the feed conductor with the ambient temperature (E_T) against the lookup table to obtain a dynamic temperature threshold T _th . In another embodiment, the control unit 14 calculates a dynamic temperature threshold T based on the current (I) of the feed conductor and the ambient temperature (E_T) as a function of the temperature threshold T _th (I, E_T). _Th .

[Possible effects of the examples]

In summary, the plug and the socket with the intelligent thermal protection mechanism provided by the embodiments of the present invention can dynamically determine the feed conductor (such as the conductive connection according to the condition of the housing or the external ambient temperature and the current current). The temperature limit of the foot or power lead can be adapted to the ambient temperature to provide a more accurate current over temperature protection mechanism.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

11‧‧‧ Current sensing unit

12‧‧‧First temperature sensing unit

13‧‧‧Second temperature sensing unit

14‧‧‧Control unit

Iac‧‧‧ Current

15‧‧‧Controllable switch

16‧‧‧ socket

Claims (10)

A power plug having an intelligent thermal protection mechanism includes: a current sensing unit that senses a current flowing through a conductive pin of the power plug; and a first temperature sensing unit disposed in a casing of the power plug a second temperature sensing unit that measures an ambient temperature; and a control unit coupled to the current sensing unit, the first temperature sensing unit, and the second temperature a sensing unit and a controllable switch, wherein the controllable switch is electrically connected in series to the conductive pin, and the control unit determines the current of the conductive pin and the second temperature sensing unit according to the current sensing unit Measuring the ambient temperature to determine whether the temperature of the conductive pin measured by the first temperature sensing unit is over temperature; wherein, when the temperature of the conductive pin is determined to be over temperature, the control unit is turned off The switch is to interrupt the current flowing through the conductive pin. The power plug having the intelligent thermal protection mechanism according to Item 1, wherein the control unit stores a lookup table, and the control unit compares the current of the conductive pin with the ambient temperature to the lookup table to obtain a lookup table. Temperature threshold. A power plug having an intelligent thermal protection mechanism according to claim 1, wherein the control unit calculates a current threshold based on a current of the conductive pin and the ambient temperature. A power plug having an intelligent thermal protection mechanism according to claim 1, wherein the control unit is a microcontroller (MCU) or a central processing unit (CPU). A power socket having an intelligent thermal protection mechanism includes: a current sensing unit that senses a current flowing through a feed conductor of the power socket; and a first temperature sensing unit disposed in a casing of the power socket a second temperature sensing unit that measures an ambient temperature; and a control unit coupled to the current sensing unit, the first temperature sensing unit, and the second temperature a sensing unit and a controllable switch, wherein the controllable switch is electrically connected in series The control unit determines the current measured by the current sensing unit and the ambient temperature measured by the second temperature sensing unit to determine the first temperature sensing unit Whether the temperature of the feed conductor is excessive temperature; wherein, when the temperature of the feed conductor is judged to be over temperature, the control unit turns off the switch to turn off the current flowing through the feed conductor. The power socket having the intelligent thermal protection mechanism according to claim 5, wherein the power socket comprises a power plug, the feed conductor comprises a conductive pin of the power plug, and the first temperature sensing unit senses The temperature of the conductive pin, the current sensing unit senses a current flowing through the conductive pin. The power socket having the intelligent thermal protection mechanism according to claim 5, wherein the power socket is a power extension cable socket, and the power conductor comprises a conductive pin and a wire of a power input plug electrically connected to each other And a conductive sheet of the power output socket, wherein the first temperature sensing unit senses a temperature of a preset position on the wire, and the current sensing unit senses a current of the wire. The power socket having the intelligent thermal protection mechanism according to claim 5, wherein the control unit stores a lookup table, and the control unit compares the current of the feed conductor with the ambient temperature to the lookup table to obtain a lookup table. Temperature threshold. A power outlet having an intelligent thermal protection mechanism according to claim 5, wherein the control unit calculates a current threshold based on a current of the feed conductor and the ambient temperature. A power outlet having an intelligent thermal protection mechanism according to claim 5, wherein the control unit is a microcontroller (MCU) or a central processing unit (CPU).