CN216903426U - Power line temperature detection protection device and temperature detection control device - Google Patents
Power line temperature detection protection device and temperature detection control device Download PDFInfo
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- CN216903426U CN216903426U CN202123447745.7U CN202123447745U CN216903426U CN 216903426 U CN216903426 U CN 216903426U CN 202123447745 U CN202123447745 U CN 202123447745U CN 216903426 U CN216903426 U CN 216903426U
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Abstract
The utility model provides a power line temperature detection protection device and a temperature detection control device, wherein the power line temperature detection protection device comprises a power plug, an electric device, a power line and the temperature detection control device, the electric device comprises a load switch device, and the power line comprises a live wire and a zero wire which are led out from the power plug and are respectively connected to the electric device. The temperature detection control device comprises a power plug, a temperature sensor, a signal detection control unit and a signal wire, wherein the power plug is arranged on the power plug, the temperature sensor is connected with the live wire or the zero wire, the signal detection control unit of the electric equipment is arranged on the signal wire, the temperature sensor is connected with the signal detection control unit, the temperature sensor feeds back the temperature change of the power plug, the signal detection control unit controls the electric equipment to be disconnected or connected with the load switch device, and a warning response signal is provided for a user.
Description
Technical Field
The present invention relates to a temperature protection device, and more particularly, to a power line temperature detection protection device and a temperature detection control device.
Background
Scientific progress and technology development, various electric appliances or electronic products gradually enter the lives of people and gradually become indispensable. The existing electric appliances or electronic products are connected with a power supply through a power line to obtain working electric energy. That is, the power cord is a wire connecting a power source and an electrical appliance or an electronic product. However, the power cord has been conventionally overheated in the early days to cause fire or other safety problems, that is, the power cord has not had a setting to secure safety of users and appliances. Nowadays, power cords used in high power electrical appliances must be provided with an overheat protection function to ensure the safety of users and electrical appliances. Further, when the temperature of the power line is too high, the power line is automatically disconnected to protect users and electric appliances, and when the temperature returns to normal, the power line is automatically switched on to facilitate the users to continue using, but the early traditional power line cannot meet the requirement.
In view of the problem that the conventional power cord is not provided with overheat protection in the early period, a prior case (CN211719903U) discloses a plug structure with a built-in thermal protector, wherein the disclosed technical scheme is a thermal protector which can be automatically switched off when the temperature of the circuit is too high and can be automatically switched on when the temperature is lower, the plug structure can play a good protection role and can be repeatedly used, the increase of the use cost of a user can be avoided, and the overall structure design of the plug structure is very reliable. However, the disadvantage of this is that the power supply line cannot feed back a signal to the load after a power failure, so that the load cannot react to it. That is, the plug structure provided with the thermal protector may be turned off or on according to a temperature change, but the electrical appliance connected to the plug may not be restored to the previous operation mode, and further feedback cannot be provided using the electrical appliance. However, nowadays, electrical devices, such as household electrical appliances, have higher and higher degree of intelligence, and these highly intelligent devices not only passively respond to external signals, but also actively analyze external signals and make corresponding response actions according to the analysis result, for example, when an external signal representing too high temperature is received, a relative response action such as an alarm can be performed. However, the power cord is not suitable for highly intelligent electrical equipment to achieve the above analysis and feedback response.
Disclosure of Invention
An advantage of the present invention is that it provides a power line temperature detection protection device and a temperature detection control apparatus, in which a power supply state of a corresponding load of a power consumer is controlled according to a temperature change of a power plug, and a warning response signal is provided. Furthermore, when the temperature of the power plug is too high, a load switch device of the electric equipment is disconnected, when the temperature of the power plug returns to normal, the load switch of the electric equipment is restarted, and corresponding warning response signals are provided when the load switch device of the electric equipment is disconnected and restarted.
One advantage of the present invention is that it provides a power line temperature detection protection device and a temperature detection control apparatus, wherein the power consumption device has a configuration capable of actively analyzing a signal and making a corresponding response action according to an analysis result when the power consumption device is automatically powered off or powered on in accordance with a temperature change of the power plug.
Another advantage of the present invention is that it provides a power cord temperature detection protection device and a temperature detection control apparatus, wherein when the temperature of the power plug changes, a signal is transmitted via a signal line to an electric device, which can automatically control a load switching device to be disconnected or connected. Particularly, after the electric equipment is disconnected from the circuit, an alarm response signal, such as an alarm, a buzzer, a message or the like, can be provided to the user, wherein the alarm response signal can also be provided to the electronic device designated by the user by means of wired or wireless (WiFi or bluetooth) remote transmission.
Another advantage of the present invention is to provide a power line temperature detection protection device and a temperature detection control device, wherein when the power plug is overheated, the electrical equipment directly and automatically disconnects the load switch device thereof to ensure the safety of the user, and when the temperature of the power plug returns to normal, the electrical equipment directly and automatically connects the load switch device thereof electrically, wherein when the electrical equipment is activated, the warning response signal can be provided to the user or the user at the same time, so that the user can receive the corresponding message in real time.
Another advantage of the present invention is that it provides a power line temperature detection protection device and a temperature detection control device, wherein when the temperature of the power plug changes, a signal detection control unit provided in the electrical equipment controls the electrical equipment to perform various actions including disconnection or connection of the load switch device and provision of the warning response signal.
Another advantage of the present invention is that it provides a power cord temperature detection protection device and a temperature detection control apparatus, wherein when the temperature of the power plug changes, the power plug is not powered off or turned on, but the power-using device directly performs various actions. In other words, the signal detection control unit ensures the acquisition of electric energy through a power circuit.
Another advantage of the present invention is to provide a power line temperature detection protection device and a temperature detection control apparatus, wherein the power line temperature detection protection device and the temperature detection control apparatus are used for instantly transmitting the state of the electric equipment to an absent user, so that a remote user can instantly know the power consumption condition of the electric equipment, thereby reducing the risk of the temperature rise of the power line. Meanwhile, after the user receives the warning response signal, the user can further remotely control the electric equipment so as to increase the use convenience.
Another advantage of the present invention is that it provides a power line temperature detection protection apparatus and a temperature detection control device which do not require precise parts and complicated structures, and which are simple in manufacturing process and low in cost.
Additional advantages and features of the utility model will be set forth in the detailed description which follows and in part will be apparent from the description, or may be learned by practice of the utility model as set forth hereinafter.
According to the present invention, the foregoing and other objects and advantages are achieved by the temperature detection protection apparatus for a power supply line of the present invention, comprising:
a power plug;
an electrically powered device;
the power line comprises a live wire and a zero wire which are led out from the power plug and are respectively connected to the electric equipment; and
the temperature detection control device comprises a power plug, a temperature sensor, a signal detection control unit and a signal wire, wherein the power plug is connected with the live wire or the zero wire, the signal detection control unit is arranged on the electric equipment, the signal wire is connected with the temperature sensor and the signal detection control unit, the temperature sensor feeds back the temperature change of the power plug according to the voltage or current change of the signal wire, and the signal detection control unit provides a warning response signal according to the voltage or current change of the signal wire.
According to an embodiment of the present invention, the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a positive temperature coefficient thermistor, and the resistance value of the thermistor has an electrical characteristic that increases with increasing temperature.
According to an embodiment of the present invention, the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a negative temperature coefficient thermistor, and the resistance value of the thermistor has an electrical characteristic that decreases with increasing temperature.
According to an embodiment of the present invention, the electric device includes a power circuit, a load switch device whose on/off state is controlled by the signal detection control unit, and at least one load which is powered and connected to the power circuit under the on/off control of the load switch device, wherein the power circuit is powered and connected to the power plug through the neutral wire and the live wire, and the signal detection control unit is powered and connected to the power circuit to control the power supply state of the load by controlling the load switch device to be disconnected or connected based on the voltage or current change of the signal wire.
According to an embodiment of the present invention, the warning response signal is a control command for controlling the temperature detection control device to generate a corresponding warning action in response to a voltage or current change of the signal line, wherein the warning action is at least one of an audio warning, a light warning, and transmitting a warning message to a designated electronic device.
According to an embodiment of the present invention, the specific electronic device is an electronic communication device such as a mobile phone, an IPAD, and a notebook computer.
According to another aspect of the present invention, there is further provided a temperature detection control device connected to a power plug and an electric device for sensing a temperature change of the power plug, comprising:
the temperature sensor is arranged on the power plug and is connected with a live wire or a zero wire of a power wire led out from the power plug;
a signal detection control unit arranged on the electric equipment; and
the signal line is connected between the temperature sensor and the signal detection control unit, wherein the temperature sensor feeds back the temperature change of the power plug according to the voltage or current change of the signal line, and the signal detection control unit provides an alarm response signal based on the voltage or current change of the signal line.
According to an embodiment of the present invention, the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a positive temperature coefficient thermistor, and the resistance value of the thermistor has an electrical characteristic that increases with increasing temperature.
According to an embodiment of the present invention, the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a negative temperature coefficient thermistor, and the resistance value of the thermistor has an electrical characteristic that decreases with increasing temperature.
According to an embodiment of the present invention, the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a negative temperature coefficient thermistor, and the resistance value of the thermistor has an electrical characteristic that decreases with increasing temperature.
Further objects and advantages of the utility model will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
Fig. 1A and 1B are schematic views of a power line temperature detection protection apparatus according to a first preferred embodiment of the present invention.
Fig. 2A and 2B are schematic views of a power line temperature detection protection apparatus according to a second preferred embodiment of the present invention.
Detailed Description
The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the utility model, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Fig. 1A to 1B show a power line temperature detection protection device, apparatus and method thereof according to a first preferred embodiment of the present invention, which has a power-off or power-on operation according to temperature, and actively analyzes an external signal and sets a corresponding response operation according to the analysis result. The power line temperature detection protection device 1 comprises a power plug 10, a power consumption device 20 and a temperature detection control device 30. The power plug 10 is connected to the electric device 20. The temperature detection control device 30 is respectively connected between the power plug 10 and the electric equipment 20 to sense the temperature change of the power plug 10, the electric equipment 20 is disconnected from the electric connection in an overheat state, the electric equipment 20 is recovered to the electric connection in a normal state, and the temperature detection control device 30 can provide a warning response signal for a user, so that the safety of the user and the electric equipment in use is ensured, and the user can obtain the use condition of the electric equipment 20 in real time. Specifically, the warning response signal may be an alarm or a buzzer, or may be a message, which may be transmitted to various electronic devices such as a mobile phone, an IPAD, or a computer of the user through a network. In addition, the overheat state indicates that the temperature of the power plug 10 rises to a preset dangerous value. The normal state indicates that the temperature of the power plug 10 is returned to a normal operating temperature.
In the embodiment of the present invention, the power line temperature detection protection device 1 further includes a power line 40, which includes a live line L and a neutral line N. It is understood that the power line 40 may also include a ground line G, and the ground line G is not required, which is not a limitation of the present invention. The ground wire G, the live wire L and the zero wire N are respectively led out from the power plug 10 and connected to the electric equipment 20. In other words, the ground wire G, the live wire L, and the zero wire N respectively have two ends, one end of which is connected to the electric device 20, and the other end of which is connected to the power plug 10, and is connected to the outside through the power plug 10 to obtain power to the electric device 20. Particularly, the temperature detection control device 30 is connected to one end of the live wire L to sense the voltage value of the live wire L, so as to further determine the temperature of the power plug 10, and when the temperature rises to the preset dangerous value, the temperature detection control device 30 sends a stop control signal to stop the operation of the electric equipment 20 and provide the warning response signal, and when the temperature falls back to the working temperature, the temperature detection control device 30 is connected to send a start control signal to restart the operation of the electric equipment 20 and provide the warning response signal.
In the embodiment of the present invention, the electric device 20 includes an electric device body 21, a power circuit 22, a load switch device 23 and a load 24. The power supply circuit 22, the load switching device 23, and the load 24 are respectively provided to the electric appliance body 21. One end of the live wire L and one end of the neutral wire N are respectively connected to the power circuit 22 of the electric device 20. The load switching device 23 is connected to the power supply circuit 22, the load 24, and the temperature detection control device 30, respectively. The temperature detection control device 30 is respectively connected to the load switch device 23, the live line L and the power circuit 22, so as to further analyze and judge and control the load switch device 23 to be powered on or powered off after detecting the voltage value of the live line L, and then the temperature detection control device 30 can also provide the warning response signal. It can be understood that the temperature detection control device 30 forms a loop with the live line L, so that the temperature detection control device 30 obtains the temperature variation of the power plug 10 and controls the disconnection or connection of the load switch device 23 to control the power supply state of at least one load 24 of the electric equipment 20, and the corresponding warning response signals are provided according to various states. In other words, the temperature detection control device 30 controls the on/off state of the load switch device 23 and the power supply state of the load 24 according to the information of the temperature variation of the power plug 10 and provides the corresponding warning response signal.
In the embodiment of the present invention, the temperature detection control device 30 includes a temperature sensor 31, a signal line 32 and a signal detection control unit 33. The first end 311 of the temperature sensor 31 is connected to the live wire L and is disposed in the power plug 10, and the signal line 32 is led out from the second end 312 of the temperature sensor 31 and extends to the signal detection control unit 33 through the power line 40. The signal line 32 connects the temperature sensor 31 and the signal detection control unit 33. The signal detection control unit 33 is connected to the power circuit 22 and the load switch device 23, and is disposed in the electric appliance body 21 of the electric equipment 20. When the temperature of the power plug 10 changes, the temperature sensor 31 senses the voltage change, transmits a voltage signal to the signal detection control unit 33 through the signal line 32, and controls the load switch device 23 of the electric device 20 to be disconnected or connected after being judged by the signal detection control unit 33, so as to further control the power supply state of the load 24. Specifically, the signal detection control unit 33 can also provide the warning response signal to the user, so that the user receives the relevant message in real time. The warning response signal can be implemented as an alarm, a buzzer or a message, wherein the warning response signal can be directly transmitted to various electronic devices designated by the user by using a wired or wireless (WiFi or bluetooth) remote transmission mode.
It should be noted that the signal detection control unit 33 can be implemented as a processor unit (e.g. MCU) and/or a communication unit of the electric device 20 itself. Furthermore, various modules of the electric equipment 20 can be used for corresponding responses, so that the cost is reduced, the electric equipment 20 can be better protected, richer intelligent control is realized, and the electric equipment is more convenient to use.
Further, when the temperature of the power plug 10 increases or decreases, the temperature sensor 31 senses the temperature change thereof to feed back the voltage signal provided, the signal detection control unit 33 receives the voltage signal provided by the temperature sensor 31 through the signal line 32, and the signal detection control unit 33 sends out a control signal to control the load switch device 23 to be disconnected or connected. The signal detection control unit 33 may be used to send the warning response signal. The warning response signal can be directly transmitted to an electronic device appointed by a user, so that the user can immediately obtain related information.
In the embodiment of the present invention, the temperature sensor 31 may be implemented as a thermistor 31A, and the resistance value varies with the temperature, i.e. it may increase with the temperature increase or decrease with the temperature decrease. The temperature sensor 31 is connected between the live line L and the signal line 32. The live line L forms a loop with the signal line 32. In this loop, the voltage value on the signal line 32 changes, i.e., the voltage increases with increasing temperature, or the voltage decreases with increasing temperature. The signal detection control unit 33 detects the voltage change and performs a corresponding action according to the voltage change.
In the embodiment of the present invention, the signal detection control unit 33 is disposed in the electric device 20 and connected to the thermistor 31A through the signal line 32 to form a loop between the signal line 32 and the live line L, wherein the voltage of the signal line 32 is related to the resistance value of the thermistor 31A, and the temperature change information of the power plug 10 can be fed back based on the electrical characteristic that the resistance value of the thermistor 31A changes with the temperature change, wherein the signal detection control unit 33 is configured to control the on-off state of the load switch device 23 based on a voltage change of the signal line 32, and to provide a warning response signal in response to the off state of the load switch device 23, so as to control the on-off state of the load switch device 23 and provide the warning response signal according to the temperature change information of the power plug 10.
Further, when all the normal conditions exist, the temperature at the position of the power plug 10 belongs to a normal range, and at this time, the upper side of the live wire L has a high level (voltage with a positive value), the temperature sensor 31 has a certain resistance value, and the resistance value can share a certain voltage, so that the voltages at the two ends of the temperature sensor 31 are different, wherein a first end is the end where the temperature sensor 31 is connected to the live wire L, a second end is the end where the temperature sensor 31 is connected to the signal detection control unit 33, wherein the voltage at the first end is higher than that at the second end, and at this time, the signal detection control unit 33 detects that a low level (low voltage) is received. However, when the temperature at the position of the power plug 10 increases, the resistance value of the temperature sensor 31 decreases, then the voltage shared by the temperature sensor 31 is less, the voltage difference between the first end and the second end of the temperature sensor 31 is not great, and the signal detection control unit 33 detects a high level (high voltage), which indicates that the temperature of the power plug 10 is too high, and then the load switch device 23 will be powered off to protect the safety of the user or the electrical appliance. In addition, when the temperature slowly decreases and all the signals return to normal, the resistance value of the temperature sensor 31 also increases, and at this time, the temperature sensor 31 shares a voltage difference, so that the signal detection control unit 33 detects that a low level (low voltage) is received, which indicates that the plug temperature is normal, and the load switch device 23 is turned on for continuous use. It should be mentioned that, of course, the resistance value of the temperature sensor 31 may also increase with the temperature, at this time, the signal detection control unit 33 detects that a low level is received when the temperature is too high, and the signal detection control unit 33 detects that a high level is received when the temperature returns to normal. This is not a limitation of the present invention.
In another modified embodiment, as shown in fig. 1B, the electrical equipment 20 further includes an intelligent chip 25 connected to the signal detection control unit 33, wherein the intelligent chip 25 can be utilized to receive the control signal and then perform various subsequent responses, including controlling the load switch device 23 and providing the warning response signal. Alternatively, the smart chip 25 may directly replace the signal detection control unit 33 for controlling the load switch device 23 and providing the warning response signal. This is not a limitation of the present invention. Particularly, when the electric device 20 has a sound generating/emitting/communication module, various modules can be directly used to perform corresponding response actions, so as to realize richer intelligent control. For example: after the smart chip 25 is connected to the signal of the signal detection control unit 33, the corresponding warning response signal can be directly sent to the designated electronic device, such as a mobile phone, an IPAD, a computer, etc.
Fig. 2A shows a power line temperature detection protection device, apparatus and method thereof according to a second preferred embodiment of the present invention, which has the functions of powering off or on according to the temperature, actively analyzing the external signal and setting the corresponding response according to the analysis result. The power line temperature detection protection device 1 comprises a power plug 10, a power consumption device 20 and a temperature detection control device 30. The power plug 10 is connected to the electric device 20. The temperature detection control device 30 is respectively connected between the power plug 10 and the electric equipment 20 to sense the temperature change of the power plug 10, the electric equipment 20 is disconnected from the electric connection in an overheat state, the electric equipment 20 is recovered to the electric connection in a normal state, and the temperature detection control device 30 can provide a warning response signal for a user, so that the safety of the user and the electric equipment in use is ensured, and the user can obtain the use condition of the electric equipment 20 in real time.
In the embodiment of the present invention, the power line temperature detection protection device 1 further includes a power line 40, which includes a live line L and a neutral line N. It is understood that the power line 40 may also include a ground line G, and the ground line G is not required, which is not a limitation of the present invention. The ground wire G, the live wire L and the neutral wire N are respectively led out from the power plug 10 and connected to the electric equipment 20. In other words, the ground wire G, the live wire L, and the neutral wire N respectively have two ends, one end of which is connected to the electric device 20, and the other end of which is connected to the power plug 10, and are connected to the outside through the power plug 10 to obtain power to the electric device 20. Particularly, the temperature detection control device 30 is connected to one end of the zero line N to sense the voltage value of the zero line N, so as to further determine the temperature of the power plug 10, and when the temperature rises to the preset dangerous value, the temperature detection control device 30 sends a stop control signal to stop the operation of the electric equipment 20 and provide the warning response signal, and when the temperature falls back to the working temperature, the temperature detection control device 30 is connected to send a start control signal to restart the operation of the electric equipment 20 and provide the warning response signal.
In the embodiment of the present invention, the electric device 20 includes an electric device body 21, a power circuit 22, a load switch device 23 and a load 24. The power supply circuit 22, the load switching device 23, and the load 24 are respectively provided to the electric appliance body 21. One end of the live wire L and one end of the neutral wire N are respectively connected to the power circuit 22 of the electric device 20. The load switching device 23 is connected to the power supply circuit 22, the load 24, and the temperature detection control device 30, respectively. The temperature detection control device 30 is respectively connected to the load switch device 23, the zero line N and the power circuit 22, so as to further analyze, judge and control the load switch device 23 to be powered on or powered off after detecting the voltage value of the zero line N, and at this time, the temperature detection control device 30 can also provide the warning response signal. It can be understood that the temperature detection control device 30 and the neutral wire N form a loop, so that the temperature detection control device 30 obtains the temperature variation of the power plug 10, and controls the disconnection or connection of the load switch device 23 to control the power supply state of at least one load 24 of the electric equipment 20, and provides the corresponding warning response signal according to various states. In other words, the temperature detection control device 30 controls the on/off state of the load switch device 23 and the power supply state of the load 24 according to the information of the temperature variation of the power plug 10 and provides the corresponding warning response signal.
In the embodiment of the present invention, the temperature detection control device 30 includes a temperature sensor 31, a signal line 32 and a signal detection control unit 33. The first end 311 of the temperature sensor 31 is connected to the neutral wire N and is disposed in the power plug 10, and the signal line 32 is led out from the second end 312 of the temperature sensor 31 and extends to the signal detection control unit 33 through the power line 40. The signal line 32 connects the temperature sensor 31 and the signal detection control unit 33. The signal detection control unit 33 is connected to the power circuit 22 and the load switch device 23, and is disposed in the electric appliance body 21 of the electric equipment 20. When the temperature of the power plug 10 changes, the temperature sensor 31 senses the voltage change, transmits a voltage signal to the signal detection control unit 33 through the signal line 32, and controls the load switch device 23 of the electric device 20 to be disconnected or connected after being judged by the signal detection control unit 33, so as to further control the power supply state of the load 24. Specifically, the signal detection control unit 33 can also provide the warning response signal to the user, so that the user receives the relevant message in real time. The warning response signal can be implemented as an alarm, a buzzer or a message, wherein the warning response signal can be directly transmitted to various electronic devices designated by the user by using a wired or wireless (WiFi or bluetooth) remote transmission mode.
It should be noted that the signal detection control unit 33 can be implemented as a processor unit (e.g. MCU) and/or a communication unit of the electric device 20 itself. Furthermore, various modules of the electric equipment 20 can be used for corresponding responses, so that the cost is reduced, the electric equipment 20 can be better protected, richer intelligent control is realized, and the electric equipment is more convenient to use.
In the embodiment of the present invention, the temperature sensor 31 may be implemented as a thermistor 31A, and the resistance value varies with the temperature, i.e. it may increase with the temperature increase or decrease with the temperature decrease. The temperature sensor 31 is connected between the zero line N and the signal line 32. The neutral line N and the signal line 32 form a loop. In this loop, the voltage value on the signal line 32 changes, i.e., the voltage increases with increasing temperature, or the voltage decreases with increasing temperature. The signal detection control unit 33 detects the voltage change and performs a corresponding action according to the voltage change.
Further, when all is normal, the temperature of the position of the power plug 10 belongs to a normal range, at this time, the zero line N has a zero level (voltage value is 0 voltage), the signal detection control unit 33 provides a negative voltage (voltage value is negative), the temperature sensor 31 has a certain resistance value, the resistance shares a certain voltage, the voltages of the two ends of the temperature sensor 31 are different, wherein the first end is the end where the temperature sensor 31 is connected to the zero line N, the second end is the end where the temperature sensor 31 is connected to the signal detection control unit 33, the voltage of the first end is higher than the voltage of the second end, and at this time, the signal detection control unit 33 detects that a low level (negative voltage) is received. However, when the temperature of the power plug 10 rises and the resistance of the temperature sensor 31 decreases, the voltage shared by the temperature sensor 31 is relatively small, the voltage difference between the first end and the second end of the temperature sensor 31 is not large, and the signal detection control unit 33 detects a high level (close to 0 voltage), which indicates that the temperature of the power plug 10 is too high, and the load switch device 23 is powered off to protect the safety of the user. In addition, when the temperature slowly decreases and all the signals return to normal, the resistance value of the temperature sensor 31 also increases, and at this time, the temperature sensor 31 shares a voltage difference, so that the signal detection control unit 33 detects that a low level (negative voltage) is received, which indicates that the plug temperature is normal, and the load switch device 23 is turned on for continuous use. It should be mentioned that, of course, the resistance value of the temperature sensor 31 may also increase with the temperature, at this time, the signal detection control unit 33 detects that a low level is received when the temperature is too high, and the signal detection control unit 33 detects that a high level is received when the temperature returns to normal. This is not a limitation of the present invention.
In another variant, as shown in fig. 2B, the electric device 20 further includes an intelligent chip 25, which can directly replace the signal detection control unit 33, for controlling the load switch device 23 and providing the warning response signal. Alternatively, the smart chip 25 is connected to the signal detection control unit 33, wherein after the smart chip 25 receives the control signal, the following various responses, including controlling the load switch device 23 and providing the warning response signal, can be performed, which is not limited by the present invention. Particularly, when the electric device 20 has a sound generating/emitting/communication module, various modules can be directly used to perform corresponding response actions, so as to realize richer intelligent control. For example: after the smart chip 25 is connected to the signal of the signal detection control unit 33, the corresponding warning response signal can be directly sent to the designated electronic device, such as a mobile phone, an IPAD, a computer, etc.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are given by way of example only and are not limiting of the utility model.
The objects of the utility model have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (9)
1. A power line temperature sensing protection device, comprising:
a power plug;
an electrically powered device;
the power line comprises a live wire and a zero wire which are led out from the power plug and is respectively connected to the electric equipment; and
the temperature detection control device comprises a power plug, a temperature sensor, a signal detection control unit and a signal wire, wherein the power plug is connected with the live wire or the zero wire, the signal detection control unit is arranged on the electric equipment, the signal wire is connected with the temperature sensor and the signal detection control unit, the temperature sensor feeds back the temperature change of the power plug according to the voltage or current change of the signal wire, and the signal detection control unit provides a warning response signal according to the voltage or current change of the signal wire.
2. The power supply line temperature detection protection apparatus according to claim 1, wherein the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a positive temperature coefficient thermistor, and a resistance value corresponding to the thermistor has an electrical characteristic that increases with an increase in temperature.
3. The power supply line temperature detection protection apparatus of claim 1, wherein the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a negative temperature coefficient thermistor, and a resistance value corresponding to the thermistor has an electrical characteristic that decreases with an increase in temperature.
4. The power line temperature detection protection apparatus according to any one of claims 1 to 3, wherein the electric device includes a power circuit, a load switch device whose on-off state is controlled by the signal detection control unit, and at least one load which is power-supplied and connected to the power circuit under on-off control of the load switch device, wherein the power circuit is power-supplied and connected to the power plug via the neutral wire and the live wire, and the signal detection control unit is power-supplied and connected to the power circuit to control the power supply state of the load by disconnecting or connecting the load switch device based on a change in voltage or current of the signal line.
5. The power line temperature detection protection apparatus according to claim 4, wherein the warning response signal is a control command for controlling the temperature detection control device to generate a corresponding warning action in response to a voltage or current change of the signal line, wherein the warning action is at least one of a sound warning, a light warning, and transmitting a warning message to a designated electronic device.
6. The power line temperature detection and protection apparatus according to claim 5, wherein the designated electronic device is an electronic communication device such as a mobile phone, an IPAD, and a notebook computer.
7. A temperature detection control device connected to a power plug and an electric device for sensing a temperature change of the power plug, comprising:
the temperature sensor is arranged on the power plug and is connected with a live wire or a zero wire of a power wire led out from the power plug;
a signal detection control unit arranged on the electric equipment; and
the signal line is connected between the temperature sensor and the signal detection control unit, wherein the temperature sensor feeds back the temperature change of the power plug according to the voltage or current change of the signal line, and the signal detection control unit provides an alarm response signal based on the voltage or current change of the signal line.
8. The temperature sensing control device according to claim 7, wherein the temperature sensor is implemented as a thermistor, wherein the thermistor is configured as a positive temperature coefficient thermistor, and a resistance value corresponding to the thermistor has an electrical characteristic that increases with an increase in temperature.
9. The temperature detection control device according to claim 7, wherein the temperature sensor is implemented as a thermistor, wherein the thermistor is provided as a negative temperature coefficient thermistor, and a resistance value corresponding to the thermistor has an electrical characteristic that decreases with an increase in temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123447745.7U CN216903426U (en) | 2021-12-30 | 2021-12-30 | Power line temperature detection protection device and temperature detection control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123447745.7U CN216903426U (en) | 2021-12-30 | 2021-12-30 | Power line temperature detection protection device and temperature detection control device |
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| CN216903426U true CN216903426U (en) | 2022-07-05 |
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