CN218850389U - Over-temperature protection circuit and socket - Google Patents
Over-temperature protection circuit and socket Download PDFInfo
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- CN218850389U CN218850389U CN202223141087.3U CN202223141087U CN218850389U CN 218850389 U CN218850389 U CN 218850389U CN 202223141087 U CN202223141087 U CN 202223141087U CN 218850389 U CN218850389 U CN 218850389U
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Abstract
The utility model discloses an excess temperature protection circuit and socket. The over-temperature protection circuit includes: the device comprises a power supply conversion module, a control module and an over-temperature detection module. The power supply conversion module is connected to an external power supply and converts the external power supply into a working power supply; the control module is connected to the power conversion unit to obtain a working power supply and is used for outputting a first control signal; the over-temperature detection module is connected to the control module and the external power supply and is used for receiving a first control signal of the control module to detect whether the load of the output end of the control module exceeds the rated load or not and sending an overload signal to the control module under the condition that the load of the output end exceeds the rated load. The disclosed over-temperature protection circuit can be repeatedly used while solving overload protection, and can prompt a user that an overload protection condition occurs by using a client.
Description
Technical Field
The utility model relates to a domestic circuit field especially relates to excess temperature protection circuit and socket.
Background
In order to ensure the safety of the electricity utilization process, a corresponding overload protection measure is generally set in the use process of a socket (for example, an outdoor dimming socket on the current market) to prevent potential safety hazards caused by short circuit and the like.
Accordingly, there is a need for an over-temperature protection circuit for a receptacle that can be reused to ensure that the performance of the receptacle is not compromised even if an overload problem occurs.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides an excess temperature protection circuit and socket, and then promote the product security.
The utility model discloses an aspect provides an excess temperature protection circuit, and it includes:
the power supply conversion module is connected to an external power supply and converts the external power supply into a working power supply;
the control module is connected to the power supply conversion unit to obtain the working power supply and is used for outputting a first control signal; and
an over-temperature detection module connected to the control module and the external power supply and configured to receive a first control signal of the control module to detect whether an output load thereof exceeds a rated load, and to send an overload signal to the control module if the output load exceeds the rated load, wherein the over-temperature detection module at least includes a bimetal and a detection subunit for generating the overload signal, and the detection subunit at least includes:
a control element having a first end connected to the external power source and a second end connected to an input terminal of the bimetal;
a semiconductor element, the output end of which is connected to the third end of the control element, and the control end of which is connected to the control module to obtain the first control signal; and
and the input end of the optical coupler is connected with the input end of the bimetallic strip and the second end of the control element, and the output end of the optical coupler is connected to the control module so as to send an overload signal to the control module.
In one embodiment, the bimetal has a normally closed switch function.
In one embodiment, in a normal operation state, the control module turns on the semiconductor element by using the first control signal to turn on the control element connected to the semiconductor element, and the external power source outputs an electrical signal after processing through the control element and the bimetal.
In one embodiment, in the case that the load of the output end exceeds the rated load, the control element continuously increases the temperature, and when the bimetallic strip senses that the temperature of the output end reaches a first threshold value, the bimetallic strip is disconnected to enable the output end of the optical coupler to output the overload signal;
and after receiving the overload signal, the control module stops outputting the first control signal, so that the semiconductor element and the control element stop working in sequence.
In one embodiment, the control module comprises:
the processing unit is connected with the over-temperature detection module, at least used for outputting the first control signal and receiving the overload signal, and stopping outputting the first control signal under the condition of receiving the overload signal;
the WiFi unit is connected with the processing unit and used for sending the overload signal received by the processing unit to a client through a cloud end; and
and the key unit is connected with the processing unit and used for sending a trigger signal to the processing unit so as to trigger the processing unit to output the first control signal.
In an embodiment, when the over-temperature protection circuit is in the over-temperature protection state, and the key unit sends the trigger signal to the processing unit and triggers the processing unit to output the first control signal, when the current temperature of the bimetal reaches the second threshold, the bimetal is in the closed state, and the output end of the over-temperature protection circuit normally operates.
In an implementation mode, under the condition that the excess temperature protection circuit is in the excess temperature protection state, when the key unit to the processing unit sends trigger signal and triggers processing unit output when first control signal, when the current temperature of bimetallic strip does not reach the second threshold value, the bimetallic strip is in the disconnection state, the optical coupler to control module sends overload signal so that the output of excess temperature protection circuit stops working.
In one embodiment, the control element is a thyristor or a relay, and the semiconductor element is any one of a thyristor, a triode, or a MOS transistor.
The utility model discloses another aspect still provides a socket, include: the over-temperature protection circuit according to any one of the preceding first aspects.
Drawings
Embodiments are shown and described with reference to the drawings. These drawings are provided to illustrate the basic principles and thus only show the aspects necessary for understanding the basic principles. The figures are not to scale. In the drawings, like reference numerals designate similar features.
Fig. 1 shows a schematic circuit diagram of an over-temperature protection circuit according to the present disclosure; and
fig. 2 shows a schematic structural diagram of a control module of the over-temperature protection circuit according to the present disclosure.
Detailed Description
In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings illustrate, by way of example, specific embodiments in which the invention may be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments according to the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.
The utility model discloses mainly pay close attention to following technical problem: how to achieve overload protection of the socket and to enable reuse of the overload protection function.
In order to solve the above problems, according to the present general inventive concept, an over-temperature protection circuit and a socket are provided. The over-temperature protection circuit includes: the device comprises a power supply conversion module, a control module and an over-temperature detection module. The power supply conversion module is connected to an external power supply and converts the external power supply into a working power supply; the control module is connected to the power conversion unit to obtain a working power supply and is used for outputting a first control signal; the over-temperature detection module is connected to the control module and the external power supply and is used for receiving a first control signal of the control module to detect whether the load of the output end of the control module exceeds the rated load or not and sending an overload signal to the control module under the condition that the load of the output end exceeds the rated load.
As shown in fig. 1, the present embodiment discloses an over-temperature protection circuit, which includes: the system comprises a power conversion module 10, a control module 20 and an over-temperature detection module 30.
Specifically, the power conversion module 10 is connected to an external power supply (e.g., input terminals N _ IN and L _ IN of the external power supply) and converts the external power supply into an operating power supply. IN this example, N _ IN and L _ IN are input as ac power, which is converted by the power conversion module 10 (e.g., an ac-to-dc conversion circuit) to a low voltage dc power for powering the control module 20.
The control module 20 is connected to the power conversion unit 10 to obtain operating power, and the control module 20 is configured to output a first control signal.
As shown in fig. 2, the control module 20 includes: processing unit 21, wiFi unit 22 and button unit 23, processing unit 21 is connected with wiFi unit 22, button unit 23 respectively. In this example, a single chip microcomputer may be used as the processing unit 21, so that the processing unit 21 is connected to the over-temperature detection module 30 and has at least functions of outputting the first control signal and receiving the overload signal.
The over-temperature detection module 30 is connected to the control module 20 and the external power supply, and is configured to receive a first control signal from the control module 20 to detect whether the load of the output terminal L _ OUT exceeds the rated load, and send an overload signal to the control module 20 in case that the load of the output terminal L _ OUT exceeds the rated load.
As shown in fig. 1, the over-temperature detection module 30 includes at least a bimetal F2 and a detection subunit 31 for generating an overload signal. In this example, the bimetal F2 has a normally closed switch function.
Specifically, the detection subunit 31 includes a control element TR1 (e.g., a thyristor), a semiconductor element Q2, an optocoupler U5, and resistors (e.g., resistors R10, R9, R18, R19, R27, and R3 shown in fig. 1) and a diode (e.g., diode D2 shown in fig. 1) connected to these components. Wherein, the anode of the control element TR1 is connected to the external power source L _ IN, and the cathode thereof is connected to the input terminal of the bimetal F2; the output terminal of the semiconductor element Q2 is connected to the control electrode of the control element TR1, and the control terminal thereof is connected to the control module 20 to obtain a first control signal; the input terminal of the photo coupler U5 is connected to the input terminal of the bimetal F2 and the cathode of the control element TR1, and the output terminal thereof is connected to the control module 20 to send an overload signal to the control module 20.
In this example, the control element TR1 may be a thyristor or a relay, and the semiconductor element Q2 may be any one of a triode, a thyristor, or a MOS transistor.
In the case where the semiconductor element Q2 is a triode, the collector of the semiconductor element Q2 is connected to the control electrode of the control element TR1, and the base thereof is connected to the control module 20 to obtain the first control signal.
The specific working principle of the over-temperature protection circuit for the socket disclosed by the invention is as follows:
the external power input terminals N _ IN and L _ IN convert the ac power through the power conversion module 10 into a low voltage dc power for supplying power to the control module 20.
IN a normal operation state, the processing unit 21 of the control module 20 generates a first control signal and transmits the first control signal to the base of the semiconductor element Q2 to turn on the control element TR1 connected to the semiconductor element Q2, and at this time, the external power source L _ IN outputs an electrical signal at the output terminal L _ OUT after being processed by the control element TR1 and the bimetal F2, so that the output terminal of the over-temperature protection circuit operates normally.
When the load of the output terminal L _ OUT exceeds the rated load, the control element TR1 continuously increases in temperature, and when the bimetal F2 senses that the temperature reaches the first threshold value, the bimetal F2 is opened to cause the output terminal of the optocoupler U5 to output an overload signal (e.g., a square wave signal).
Subsequently, the control module 20 stops outputting the first control signal to turn off the semiconductor device Q2 after receiving the overload signal, thereby stopping the operation of the control device TR 1.
Further, the overload signal is transmitted to the WiFi unit 22 while the processing unit 21 stops outputting the first control signal, so that the user can view the overload signal through the client.
When the overload protection circuit stops working due to overload protection, the user can utilize the key unit 23 disclosed herein to send a trigger signal to the processing unit 21 to trigger the processing unit 21 to output the first control signal to implement the re-working.
Specifically, under the condition that the over-temperature protection circuit is in the over-temperature protection state, when the key unit 23 sends a trigger signal to the processing unit 21 and triggers the processing unit 21 to output a first control signal, and when the operating temperature of the bimetal F2 reaches the second threshold (that is, the current temperature of the bimetal F2 is reduced to the operating temperature thereof), the bimetal is in the closed state, and the output end of the over-temperature protection circuit normally operates.
Under the condition that the over-temperature protection circuit is in the over-temperature protection state, when the key unit 23 sends a trigger signal to the processing unit 21 and triggers the processing unit 21 to output a first control signal, when the current temperature of the bimetal does not reach the second threshold (that is, the current temperature of the bimetal F2 is higher than the working temperature thereof), the bimetal F2 is in the off state, the output end of the over-temperature protection circuit still does not output, the optical coupler U5 continues to send an overload signal to the control module 20, until the working temperature of the bimetal F2 reaches the second threshold, the bimetal is closed, at this time, the optical coupler U5 does not send the overload signal to the control module 20 any more (at this time, the branch where the optical coupler U5 is located is short-circuited, and the output end of the optical coupler U5 does not output the overload signal any more).
In addition, the socket with the over-temperature protection circuit is further disclosed, and the socket can realize an overload protection function on one hand, can be repeatedly used on the other hand, can timely inform a user of the occurrence of an overload protection phenomenon through a client side, and can control the socket to work again.
Specifically, when the temperature of the control element TR1 rises when the load is overloaded, the temperature is conducted to the bimetal F2, when the temperature reaches the action temperature of the bimetal F2, the bimetal F2 is disconnected (that is, the bimetal F2 is deformed and then the contact is automatically disconnected), and after the control module 20 detects that the bimetal F2 is disconnected, the control element TR1 is controlled to be disconnected through the semiconductor element Q2, and the overload information is transmitted to the cloud end through the WiFi unit 22, so that the user is notified at the client end.
That is to say, the overtemperature protection circuit and the socket disclosed by the disclosure not only solve the socket protection problem after overload, but also can be reused, thereby achieving the purpose that the performance of the socket cannot be damaged after the overload problem occurs, and can prompt the customer to perform overload protection through the WiFi unit and the cloud.
Thus, while the present invention has been described with reference to specific examples, which are intended to be illustrative only and not to be limiting of the invention, it will be apparent to those of ordinary skill in the art that changes, additions or deletions may be made to the disclosed embodiments without departing from the spirit and scope of the invention.
Claims (9)
1. An over-temperature protection circuit, comprising:
the power supply conversion module is connected to an external power supply and converts the external power supply into a working power supply;
the control module is connected to the power supply conversion module to obtain the working power supply and is used for outputting a first control signal; and
an over-temperature detection module connected to the control module and the external power supply, and configured to receive a first control signal of the control module to detect whether an output end load of the control module exceeds a rated load, and to send an overload signal to the control module if the output end load exceeds the rated load, wherein the over-temperature detection module at least includes a bimetal and a detection subunit for generating the overload signal, and the detection subunit at least includes:
a control element having a first end connected to the external power source and a second end connected to an input terminal of the bimetal;
a semiconductor element, the output end of which is connected to the third end of the control element, and the control end of which is connected to the control module to obtain the first control signal; and
and the input end of the optical coupler is connected with the input end of the bimetallic strip and the second end of the control element, and the output end of the optical coupler is connected to the control module so as to send an overload signal to the control module.
2. The excess temperature protection circuit of claim 1, wherein the bimetal has a normally closed switch function.
3. The over-temperature protection circuit according to claim 2, wherein in a normal operation state, the control module turns on the semiconductor element by using the first control signal, so that the control element connected to the semiconductor element is turned on, and the external power source outputs an electrical signal after being processed by the control element and the bimetal.
4. The over-temperature protection circuit according to claim 2, wherein in case that the output end load exceeds the rated load, the control element continuously heats up, when the bimetal senses that the temperature of the output end reaches a first threshold value, the bimetal opens to enable the output end of the optical coupler to output the overload signal;
and after receiving the overload signal, the control module stops outputting the first control signal, so that the semiconductor element and the control element stop working in sequence.
5. The over-temperature protection circuit according to claim 1, wherein the control module comprises:
the processing unit is connected with the over-temperature detection module, at least used for outputting the first control signal and receiving the overload signal, and stopping outputting the first control signal under the condition of receiving the overload signal;
the WiFi unit is connected with the processing unit and used for sending the overload signal received by the processing unit to a client through a cloud end; and
and the key unit is connected with the processing unit and used for sending a trigger signal to the processing unit so as to trigger the processing unit to output the first control signal.
6. The over-temperature protection circuit according to claim 5, wherein when the key unit sends the trigger signal to the processing unit and triggers the processing unit to output the first control signal, and when a current temperature of the bimetal reaches a second threshold, the bimetal is in a closed state, and an output end of the over-temperature protection circuit normally operates.
7. The over-temperature protection circuit of claim 5, wherein when the button unit sends the trigger signal to the processing unit and triggers the processing unit to output the first control signal, the bimetal is in a disconnected state when the current temperature of the bimetal does not reach the second threshold, and the optical coupler sends an overload signal to the control module to stop the output terminal of the over-temperature protection circuit.
8. The over-temperature protection circuit according to claim 1, wherein the control element is a thyristor or a relay, and the semiconductor element is any one of a thyristor, a triode, or a MOS transistor.
9. A socket comprising the excess temperature protection circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223141087.3U CN218850389U (en) | 2022-11-25 | 2022-11-25 | Over-temperature protection circuit and socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223141087.3U CN218850389U (en) | 2022-11-25 | 2022-11-25 | Over-temperature protection circuit and socket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218850389U true CN218850389U (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223141087.3U Active CN218850389U (en) | 2022-11-25 | 2022-11-25 | Over-temperature protection circuit and socket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218850389U (en) |
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- 2022-11-25 CN CN202223141087.3U patent/CN218850389U/en active Active
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