CN209561782U

CN209561782U - A kind of control circuit and transformer outlet

Info

Publication number: CN209561782U
Application number: CN201920592523.8U
Authority: CN
Inventors: 秦万军; 龙海岸; 胡文涛; 施国晨
Original assignee: Ningbo Gongniu Digital Technology Co Ltd
Current assignee: Ningbo Gongniu Digital Technology Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2019-10-29
Anticipated expiration: 2029-04-26

Abstract

The utility model provides a kind of control circuit and transformer outlet, is related to power outlet field.The utility model embodiment can automatically detect the voltage and frequency of mains supply, and controls according to testing result and the voltage of mains supply is converted and exported.The control circuit includes: control module, power transformation module；Wherein, power transformation module is separately connected the output end of mains supply, transformer outlet；Control module is separately connected mains supply and power transformation module；Wherein, control module sends control instruction to voltage changing module for detecting the voltage and frequency of mains supply, and according to testing result；Voltage changing module is exported for being converted to the voltage of mains supply according to control instruction, and from the output end of transformer outlet.The utility model is applied to transformer outlet.

Description

Control circuit and transformer socket

Technical Field

The utility model relates to a supply socket field especially relates to a control circuit and transformer socket.

Background

With the improvement of living standard and the update and iteration of electronic products, the demand of people on daily living equipment is increased, and more people start foreign electrical equipment. However, since the specifications of the utility power grids used in different countries and regions are different, when people use electrical equipment in other countries or regions, the voltage of the utility power needs to be adjusted correspondingly to normally use the equipment. For example, 110V products in some countries such as the united states cannot be directly connected to 220V commercial power for other civilian uses; or a part of products which can work only at 220V are taken to a country only with a 110V power grid, and can not be directly accessed to a 110V civil power grid for use.

In order to solve the above problems, some transformer sockets for home or traveling use, which have a voltage conversion function, have come to be used. However, the transformer socket in the existing product has many problems in safety and reliability.

Therefore, the embodiment of the utility model provides a control circuit and transformer socket to improve transformer socket's security and reliability.

SUMMERY OF THE UTILITY MODEL

The utility model provides a control circuit and transformer socket, voltage and frequency that can automated inspection mains supply to control according to the testing result and transform and export mains supply's voltage.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

in a first aspect, an embodiment of the present invention provides a control circuit, which is applied to a transformer socket, and includes a control module and a power transformation module; the power transformation module is respectively connected with a mains supply and the output end of the transformer socket; the control module is respectively connected with the mains supply and the power transformation module; the control module is used for detecting the voltage and the frequency of the mains supply and sending a control instruction to the voltage transformation module according to a detection result; and the voltage transformation module is used for transforming the voltage of the mains supply according to the control instruction and outputting the voltage from the output end of the transformer socket.

In a second aspect, an embodiment of the present invention provides a transformer receptacle, including the control circuit provided by the above first aspect.

The embodiment of the utility model provides a control circuit and transformer socket, voltage and frequency that can automated inspection mains supply to control according to the testing result and alternate and export mains supply's voltage. Specifically, the utility model discloses consider because civil mains supply's user power consumption environment is complicated, often can appear mains supply and reach the unstable condition of voltage level of user's port (for example, ports such as user's block terminal, indoor socket), consequently if only judge the commercial power type according to mains supply's voltage, then probably have wrong recognition, operation scheduling problem to lead to the damage of consumer, accident such as conflagration can take place for even more. Based on the above consideration, the embodiment of the utility model provides an in detect in the lump through voltage and frequency to mains supply to control according to the testing result and alternate mains supply's voltage, thereby the emergence of avoiding above-mentioned risk, improve the security of product can more accurate discernment current mains supply's type.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 3 is a third schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 4 is a fourth schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 5 is a fifth schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 6 is a sixth schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 7 is a seventh schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 8 is an eighth schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 9 is a ninth schematic structural diagram of a control circuit according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a voltage detection submodule according to an embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Firstly, it is right the utility model discloses the design of control circuit and transformer socket that the embodiment provided introduces: the embodiment of the utility model provides a consider because civil mains supply's user power consumption environment is complicated, often can appear mains supply and reach the unstable condition of voltage level of user's port (for example, ports such as user's block terminal, indoor socket), consequently if only judge the commercial power type according to mains supply's voltage, then probably have wrong recognition, operation scheduling problem. For example, when a transformer socket is used in an area where the mains supply standard is 110V peak and 60HZ, the voltage of the mains supply entering the home may rise in a short time due to the influence of the power consumption environment, and the peak voltage of the mains supply may exceed 110V and approach 220V, so if the voltage of the mains supply is detected to determine whether the voltage is to rise or fall, an abnormal voltage may be output (for example, the 110V voltage may be reduced to 55V output in this example, and conversely, the 220V voltage may rise to 440V output). This may result in damage to the electrical equipment and even fire accidents.

Therefore, the utility model discloses think in, the different areas of commercial power standard, not only the voltage is different, still has the condition that the frequency is different. For example, the standard of the japanese commercial power supply is peak voltage 110V and frequency 60HZ, while the standard of the chinese commercial power supply is peak voltage 220V and frequency 50 HZ. Therefore, in this case, by detecting the frequency, the power standard in the scene in which the transformer socket is used can be more accurately determined. Therefore, the voltage switching mode is more accurately switched, and the problems are avoided.

Based on the above utility model discloses think, the embodiment of the utility model provides a control circuit is applied to transformer socket. As shown in fig. 1, the control circuit 10 specifically includes: a control module 101 and a power transformation module 102; the power transformation module 102 is connected to the commercial power supply and the output end of the transformer socket respectively; the control module 101 is respectively connected with a mains supply and the power transformation module 102; wherein,

the control module 101 is used for detecting the voltage and the frequency of the mains supply and sending a control instruction to the voltage transformation module 102 according to a detection result;

and the voltage transformation module 102 is used for transforming the voltage of the mains supply according to the control instruction and outputting the voltage from the output end of the transformer socket.

The embodiment of the utility model provides an in, detect in the lump through voltage and frequency to mains supply to control according to the testing result and alternate mains supply's voltage, thereby the emergence of above-mentioned risk is avoided to the type of discerning present mains supply that can be more accurate, improves the security of product.

In one implementation, as shown in fig. 2, the control module 101 specifically includes: a frequency detection sub-module 1011, a voltage detection sub-module 1012, and a control chip 1013. Wherein:

one end of the frequency detection submodule 1011 is connected with a mains supply, and the other end of the frequency detection submodule 1011 is connected with the first end of the control chip 1013; one end of the voltage detection submodule 1012 is connected to a mains supply, and the other end of the voltage detection submodule 1012 controls the second end of the chip 1013; the control chip 1013 is also connected to the voltage transformation module 102;

the frequency detection submodule 1011 is used for generating a square wave signal according to the frequency of the mains supply and sending the square wave signal to the control chip 1013;

a voltage detection submodule 1012 for generating a voltage signal according to the voltage of the utility power supply and transmitting the voltage signal to the control chip 1013;

and the control chip 1013 is configured to send a control instruction to the voltage transformation module 1012 according to the square wave signal and the voltage signal.

Further, as shown in fig. 3, in order to acquire more accurate voltage information of the utility power supply, in an embodiment of the present invention, the control module 101 further includes: the rectifier sub-module 1014. The voltage detection submodule 1012 is connected to the mains supply through the rectifier submodule 1014.

A rectifier sub-module 1014 for converting an ac power of a commercial power supply into a dc power and outputting the dc power;

the voltage detection submodule 1012 is specifically configured to detect a dc power supply to generate a voltage signal.

The embodiment of the utility model provides an in, in order to facilitate control chip to detect mains power supply's voltage, then through converting mains power supply into the direct current earlier, rethread voltage detection submodule 1012 detects the generation voltage signal to direct current power supply, and the voltage signal this moment is direct current signal, the discernment and the detection of the chip of being convenient for more.

Further, in one implementation, it is considered that there are some components in the control circuit 10, such as the control chip 1013 and other switch circuits, which need to be powered to operate. Therefore, as shown in fig. 4, in the embodiment of the present invention, the control module 101 further includes a voltage stabilizing sub-module. The voltage stabilizing sub-module is connected 1013 with the rectifier sub-module 1014 and the control chip respectively. Wherein,

the voltage stabilizing sub-module 1015 is configured to convert the dc power output by the rectifier sub-module 1014 into an operating voltage required by the control chip 1013, so as to supply power to the control chip.

Further, in one implementation, as shown in fig. 5, the voltage regulator sub-module 1015 is also connected to the power transformation module 102. Wherein,

and the voltage stabilizing submodule 1015 is further used for supplying power to the power transformation module 102.

As shown in fig. 5, in one implementation, the operating voltages of the power consumption elements in the control chip and the power transformation module may be set to be the same voltage, and further, the power may be supplied to the power consumption elements from the same output port of the voltage stabilizing sub-module 1015, that is, the power may be supplied to the control chip 1013 and the power transformation module 102 at the same time.

In another implementation, as shown in FIG. 6, the control module 101 also includes an alert sub-module 1016. The alarm sub-module 1016 is connected to the control chip 1013.

An alarm sub-module 1016 for issuing an alarm signal in response to the third control signal sent by the control chip 1013. When the voltage detection submodule detects that the voltage of the mains supply is abnormal, the control chip sends out a third control signal.

For example, when the control circuit operates in a boost mode of boosting a 110V mains supply to 220V, if the voltage of the mains supply is suddenly changed to 220V, the control chip sends out a third control signal.

In another implementation, as shown in fig. 7, the power transformation module 102 specifically includes a transformer 1021, a switch sub-module 1022, and a switching sub-module 1023. The transformer 1021 is connected to the mains supply, and the transformer 1022 is connected to the output terminal of the transformer socket via the switch sub-module 1022. The switching sub-module 1023 is connected to a transformer 1021. The switching sub-module 1023 and the switch sub-module 1022 are also connected to the control module 101, respectively. Wherein,

the switching sub-module 1023 is configured to control the transformer 1021 to switch to the first transformation mode in response to a first control signal sent by the control module 101, otherwise, the transformer 1021 maintains the second transformation mode.

Specifically, in the embodiment of the present invention, the transformer 1021 includes at least two voltage transformation modes, one of which is to output the voltage of the utility power supply after rising, and the other is to output the voltage of the utility power supply after falling, wherein the second voltage transformation mode (the second voltage transformation mode is one of at least two voltage transformation modes) is the default mode, and after receiving the first control signal of the control module 101, the second voltage transformation mode is switched to the other voltage transformation mode, that is, the first voltage transformation mode.

The switch sub-module 1022 is configured to control conduction between the transformer 1021 and the output terminal of the transformer socket in response to a second control signal sent by the control module 101. The switch sub-module 1022 is further configured to control the transformer 1021 to be disconnected from the output terminal of the transformer socket in response to a third control signal sent by the control module 101.

The control chip is used for sending a control instruction to the voltage transformation module according to the square wave signal and the voltage signal, and specifically comprises: the control module 101 is specifically configured to send a first control signal to the switching sub-module 1023 when the voltage and the frequency of the mains supply meet the conditions; the control module 101 is further specifically configured to send a second control signal to the switch sub-module 1022 after the switching sub-module 1023 completes operation; the control module 101 is further specifically configured to send a third control signal to the switch sub-module 1022 when detecting that the voltage of the utility power is abnormal.

Specifically, in one implementation, as shown in fig. 7, the control chip 1013 in the control module 101 is specifically configured to perform: when the voltage and the frequency of the mains supply meet the conditions, a first control signal is sent to the switching submodule 1023; after the switching sub-module 1023 finishes operating, a second control signal is sent to the switch sub-module 1022; and a task of sending a third control signal to the switch sub-module 1022 when the mains supply voltage abnormality is detected. At this time, the switch sub-module 1022 and the switching sub-module 1023 are directly connected to the control chip 1013 in the control module 101.

Specifically, fig. 8 specifically shows a schematic structural diagram of a control circuit provided by an embodiment of the present invention. One end of the frequency detection submodule 1011 is connected with a live wire L of a mains supply, and the other end of the frequency detection submodule 1011 is connected with the control chip 1013; the rectifier sub-module 1014 is connected to two ends of the mains supply, and is configured to convert an ac power of the mains supply into a dc power and output the dc power; the voltage detection submodule 1012 is configured to detect the rectified voltage, generate voltage signals V1 and S1, and input V1 and S2 to the control chip 1013 respectively; the voltage stabilizing sub-module 1015 is connected to the output end of the rectifying sub-module 1014, and is configured to stabilize the dc power supply output by the rectifying sub-module 1014 to the control chip 1013 and the working voltage VCC of the power transformation module 102, so as to supply power to the control chip 1013 and the power transformation module 102; the power transformation module 102 is configured to convert the commercial power supply into a corresponding voltage according to a control signal (specifically, including the above "first control signal", "second control signal", "third control signal", etc.) of the control chip 1013, and output the voltage through the output terminal L and the output terminal N; the protection module 103 is connected between the power transformation module 102 and the zero line output end N, and is used for protecting the power utilization safety of the circuit.

The control chip 1013 further includes at least three output terminals: "Work", "Control", and "Protect", wherein when the Control module 1013 detects that the voltage and the frequency of the utility power supply meet the conditions, the Control terminal sends a first Control signal to the power transformation module 102 (specifically, the switching sub-module 1023); after the switching sub-module 1023 in the power transformation module 102 finishes operating, a second control signal is sent to a switch sub-module 1022 of the power transformation module 102 through Work; when detecting that the mains supply voltage is abnormal, a third control signal is sent to the switch sub-module 1022 through the "Protect" terminal.

Specifically, as shown in fig. 9, a schematic structural diagram of a control circuit provided by an embodiment of the present invention is shown. The rectifier submodule 1014 comprises a rectifier bridge DB and an energy storage capacitor EC 1; the voltage regulation sub-module 1015 comprises a voltage regulation chip U1 and an energy storage capacitor EC 2.

The voltage detection submodule 1012 includes resistors R1 and R2, a capacitor C4, resistors R10 and R12, and a capacitor C10.

The frequency detection submodule 1011 includes a diode D11, a resistor R24, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a capacitor C20, and a transistor Q20.

The positive electrode of the diode D11 is connected with a live wire L of a mains supply, the negative electrode of the diode D11 is connected with a zero potential point GND through resistors R24, R20, R21 and R22, the base electrode of the triode Q20 is connected between R21 and R22, the base electrode of the triode Q20 is further connected with the GND through a capacitor C20, the collector electrode of the triode Q20 is connected with a working voltage VCC through R23, and the emitter electrode of the triode Q20 is connected with the zero potential point GND. In addition, the collector of the transistor Q20 is also connected to the Fs terminal of the control chip 1013, and is configured to send a square wave signal to the control chip 1013.

The control chip 1013 includes a chip IC. Specifically, the chip IC may be a programmable single chip microcomputer. For example, when the system is powered on and the VCC voltage reaches the voltage required by the MCU, the MCU starts initialization, receives the V1, Fs, and S2 signals after initialization is completed, and performs determination and processing within a set time. If V1\ Fs accords with the condition of voltage rising, a Control signal is sent out, and then a Work signal is sent out after a preset time interval; if V1\ Fs meets the voltage reduction condition, only the Work signal is sent out. Meanwhile, when the S2 signal does not accord with the set value of the abnormal prompt, the MCU does not send out the Protect signal, and if the S2 signal reaches the set value of the abnormal prompt, the MCU sends out the Protect signal.

The alarm submodule 1016 includes a light emitting diode LED and a resistor R3.

In addition, the power transformation module 102 includes a transformer 1021, a switch sub-module 1022, and a switching sub-module 1023.

As shown, the switching submodule 1023 includes a double pole double throw relay K1. A first common end a of the double-pole double-throw relay K1 is connected with a live wire L of a mains supply, and a second common end b of the double-pole double-throw relay K1 is connected with a live wire output end L of the transformer socket through the switch submodule 1022; the first normally closed end c of the double-pole double-throw relay K1 is connected with the first end of the transformer; the first normally open end d of the double-pole double-throw relay K1 is connected with the second end of the transformer 1021; the second normally closed end e of the double-pole double-throw relay K1 is connected with the second end of the transformer; the second normally open end f of the double-pole double-throw relay is connected with the first end of the transformer; the control end of the double-pole double-throw relay K1 is connected with the control module 101.

In one implementation, as shown in fig. 9, the switching sub-module 1023 further includes a transistor Q1, a resistor R4, and a capacitor C5. Specifically, as shown in the figure, the Control terminal of the double-pole double-throw relay K1 passes through a transistor Q1 and a resistor R4, the Control terminal of the double-pole double-throw relay K1 is connected to the collector of a transistor Q1, the emitter of a transistor Q1 is grounded, the base of the transistor Q1 is connected to the Control module 101 (specifically connected to the "Control" terminal pin of the Control chip 1013) through a resistor R4, and the capacitor C5 is connected between the base of the transistor Q1 and the ground terminal.

In addition, the control circuit further includes: the third end of the transformer 1021 is respectively connected with a zero line L of a mains supply and a zero line output end L of a transformer socket;

and the double-pole double-throw type relay K1 is used for responding to a first control signal sent by the control module 101 and conducting the common terminal and the normally open terminal of the double-pole double-throw type relay K1.

The ratio of the voltage V1 between the third end and the second end of the transformer to the voltage V2 between the third end and the first end of the transformer is 1: 2.

In the embodiment of the present invention, the current global power supply is usually considered to include two voltage systems, 110V and 220V. Therefore, in the embodiment of the present invention, the ratio of V1 to V2 is set to 1: 2. In a specific implementation, the ratio of V1 to V2 may also be set to other proportional relationships, and the present invention may not be limited thereto.

In addition, as shown in the figures, in the embodiment of the present invention, the switch sub-module 1022 specifically includes: the circuit comprises an electronic switch Kk01, a first triode Qk01, a second triode Qk02, a first resistor Rk01 and a second resistor Rk 02; the second common end b of the double-pole double-throw relay K1 is connected with the live wire output end of the transformer socket through an electronic switch Kk 01; the control end of the electronic switch Kk01 is connected with the collector of the first triode Qk 01; the emitter of the first triode Qk01 is connected with a zero potential point GND; the base of the first triode Qk01 is connected with the first end of the first resistor Rk 01; the second end of the first resistor Rk01 is connected with the first end of the second resistor Rk 02; a second end of the second resistor Rk02 is connected to the control module 102 (specifically to the "Work" end of the control chip 1023); the first end of the first resistor Rk01 is also connected with the collector of the second triode Qk 02; the emitter of the second triode Qk02 is connected with a zero potential point GND; the base of the second transistor Qk02 is connected to the control module 102 (specifically to the "Protect" terminal of the control chip 1023);

the control module 102 sends a second control signal to the switch sub-module 1022, which specifically includes: the control module 102 sends a high level signal to the base of the first transistor Qk 01;

the control module 102 sends a third control signal to the switch sub-module 1022, which specifically includes: the control module 102 sends a high signal to the base of the second transistor Qk 02.

In addition, as shown in fig. 9, the protection module 103 includes a self-recovery type overcurrent protection device F and a self-recovery type overtemperature protection device T, and the connection relationship thereof is shown in the figure. If the system load exceeds a set value, F and T automatically disconnect the system to supply power to the outside. When the current or the temperature returns to normal, the connection state of the F and the T can be automatically restored, and the system supplies power to the outside again. The overcurrent and overtemperature protection function is realized.

The following describes an exemplary operation of the control circuit in detail with reference to the control circuit shown in fig. 8/9: when the product is connected to the mains supply (i.e. the interface N/L of the mains supply in the previous figure is powered on), the system supplies power to the transformation module 102 and the control chip 1013 through the rectifier sub-unit 1014 and the voltage-stabilizing sub-module 1015, so that the system works normally. The frequency detection submodule 1011 and the voltage detection submodule 1012 respectively generate a V1/S2 signal representing the height characteristic of the current power grid and a signal Fs of the power grid frequency to the Control chip 1013 for processing, the Control chip 1013 judges that V1 and Fs both meet the setting, and the Control chip 1013 outputs a Control signal to Control the power transformation module 102 to automatically complete voltage transformation (110V to 220V, or 220V to 110V). Then, the control chip 1013 sends out a Work signal to open the output port to supply power to the output port. When abnormal high voltage occurs in the commercial power network, the voltage detection submodule 1012 generates an S2 signal and sends the signal to the control chip 1013, the control chip 1013 receives the S2 signal and immediately sends a Protect instruction to the power transformation module 102 and the alarm submodule 1016 after confirming that the signal is abnormal, the power transformation module 102 disconnects the output port to complete overvoltage protection processing, and the alarm submodule 1016 sends abnormal information to prompt a user to pay attention to avoiding risks. In addition, when voltage conversion is completed and no abnormal condition exists, the system finds that the output port is overloaded for use, and the protection module 103 automatically disconnects the product. After the phenomenon is relieved, the normal state is recovered. When the system is overheated, the protection module 103 also automatically disconnects the product for protection, and the system is recovered to normal after the overheat disappears.

In another implementation, as shown in FIG. 10, the voltage detection sub-module 1012 may also be composed of a high precision voltage detection IC. The input end Vin of the high-precision detection voltage IC is connected to the output end of the rectifier sub-module 1014, and outputs two paths of detection signals, V1 and S2 respectively.

In another embodiment, the present invention further provides a transformer socket, which includes the control circuit provided in the above embodiment, and the socket clamping piece, the socket housing, and other structures.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The control circuit is characterized by being applied to a transformer socket and comprising a control module and a power transformation module; the power transformation module is respectively connected with a mains supply and the output end of the transformer socket; the control module is respectively connected with the commercial power supply and the power transformation module; wherein,

the control module is used for detecting the voltage and the frequency of the mains supply and sending a control instruction to the voltage transformation module according to a detection result;

and the voltage transformation module is used for transforming the voltage of the mains supply according to the control instruction and outputting the voltage from the output end of the transformer socket.

2. The control circuit according to claim 1, wherein the control module specifically comprises a frequency detection submodule, a voltage detection submodule and a control chip; wherein,

one end of the frequency detection submodule is connected with the mains supply, and the other end of the frequency detection submodule is connected with the first end of the control chip; one end of the voltage detection submodule is connected with the mains supply, and the other end of the voltage detection submodule is connected with the second end of the control chip; the control chip is also connected with the voltage transformation module;

the frequency detection submodule is used for generating a square wave signal according to the frequency of the mains supply and sending the square wave signal to the control chip;

the voltage detection submodule is used for generating a voltage signal according to the voltage of the mains supply and sending the voltage signal to the control chip;

and the control chip is used for sending the control instruction to the voltage transformation module according to the square wave signal and the voltage signal.

3. The control circuit of claim 2, wherein the control module further comprises: a rectifier sub-module; the voltage detection submodule is connected with the mains supply through the rectifier submodule; wherein,

the rectifier sub-module is used for converting an alternating current power supply of the mains supply into a direct current power supply and outputting the direct current power supply;

the voltage detection submodule is specifically configured to detect the dc power supply and generate the voltage signal.

4. The control circuit of claim 3, wherein the control module further comprises a voltage regulation sub-module; the voltage stabilizing submodule is respectively connected with the rectifier submodule and the control chip; wherein,

and the voltage stabilizing submodule is used for converting the direct-current power supply output by the rectifier submodule into working voltage required by the control chip so as to supply power to the control chip.

5. The control circuit of claim 4, wherein the voltage regulator sub-module is further coupled to the power transformation module;

and the voltage stabilizing sub-module is also used for supplying power to the power transformation module.

6. The control circuit of claim 2, wherein the control module further comprises an alarm sub-module; the alarm submodule is connected with the control chip;

the alarm submodule is used for responding to a third control signal sent by the control chip and sending an alarm signal; when the voltage detection submodule detects that the voltage of the mains supply is abnormal, the control chip sends out the third control signal.

7. The control circuit of any of claims 1-6, further comprising a protection module; the power transformation module is connected with the output end of the transformer socket through the protection module;

the protection module is specifically configured to disconnect a connection path between the power transformation module and the output end of the transformer socket when the output end power of the transformer socket or the temperature of the control circuit is too high.

8. The control circuit according to any one of claims 1 to 6, wherein the power transformation module specifically comprises: the switching device comprises a transformer, a switch submodule and a switching submodule; the transformer is connected with the mains supply, and is connected with the output end of the transformer socket through the switch submodule; the switching submodule is connected with the transformer; the switching submodule and the switch submodule are also respectively connected with the control module; wherein,

the switching submodule is used for responding to a first control signal sent by the control module and controlling the transformer to be switched to a first transformation mode, otherwise, the transformer keeps a second transformation mode;

the switch submodule is used for responding to a second control signal sent by the control module and controlling the conduction between the transformer and the output end of the transformer socket; and controlling the transformer to be disconnected from the output end of the transformer socket in response to a third control signal sent by the control module;

the control module is specifically used for sending a first control signal to the switching submodule after the voltage and the frequency of the mains supply meet the conditions; the control module is further specifically configured to send the second control signal to the switch submodule after the switching submodule is operated; the control module is further specifically configured to send the third control signal to the switch submodule when the voltage of the mains supply is detected to be abnormal.

9. The control circuit according to claim 8, characterized in that the switching submodule, in particular comprising a relay of the double pole double throw type; the first common end of the double-pole double-throw relay is connected with the live wire of the mains supply, and the second common end of the double-pole double-throw relay is connected with the live wire output end of the transformer socket through the switch sub-module; the first normally closed end of the double-pole double-throw type relay is connected with the first end of the transformer; the first normally open end of the double-pole double-throw relay is connected with the second end of the transformer; the second normally closed end of the double-pole double-throw type relay is connected with the second end of the transformer; the second normally open end of the double-pole double-throw relay is connected with the first end of the transformer; the control end of the double-pole double-throw type relay is connected with the control module;

the control circuit further includes: the third end of the transformer is respectively connected with a zero line of the commercial power supply and a zero line output end of the transformer socket;

the double-pole double-throw relay is used for responding to a first control signal sent by the control module and conducting the common end and the normally open end of the double-pole double-throw relay.

10. The control circuit according to claim 9, wherein the switch submodule specifically includes: the circuit comprises an electronic switch, a first triode, a second triode, a first resistor and a second resistor; the second common end of the double-pole double-throw relay is connected with the live wire output end of the transformer socket through the electronic switch; the control end of the electronic switch is connected with the collector electrode of the first triode; the emitting electrode of the first triode is connected with a zero potential point; the base electrode of the first triode is connected with the first end of the first resistor; the second end of the first resistor is connected with the first end of the second resistor; the second end of the second resistor is connected with the control module; the first end of the first resistor is also connected with the collector of the second triode; the emitter of the second triode is connected with the zero potential point; the base electrode of the second triode is connected with the control module;

the control module sends the second control signal to the switch submodule, and specifically includes: the control module sends a high-level signal to the base electrode of the first triode;

the control module sends the third control signal to the switch submodule, and specifically includes: and the control module sends a high level signal to the base electrode of the second triode.

11. A transformer socket comprising a control circuit according to any one of claims 1 to 10.