CN219372001U - Communication circuit protection circuit and air conditioner - Google Patents
Communication circuit protection circuit and air conditioner Download PDFInfo
- Publication number
- CN219372001U CN219372001U CN202320826623.9U CN202320826623U CN219372001U CN 219372001 U CN219372001 U CN 219372001U CN 202320826623 U CN202320826623 U CN 202320826623U CN 219372001 U CN219372001 U CN 219372001U
- Authority
- CN
- China
- Prior art keywords
- protection
- circuit
- signal
- resistor
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The embodiment of the application provides a communication circuit protection circuit and an air conditioner, and relates to the technical field of communication circuits. The communication circuit protection circuit comprises a serial bus, a common mode inductor, a detection signal circuit and a protection signal circuit. The detection signal circuit can detect that the power supply is abnormal, when the power supply is abnormal, a detection abnormal signal is generated, and then a protection signal is generated, the protection signal circuit cuts off a loop of the power supply and the common mode inductor, so that the loop where the bus is located is disconnected, the bus is powered off, and therefore the slave module communicated on the bus cannot be damaged by the abnormal power supply.
Description
Technical Field
The application relates to the technical field of communication circuits, in particular to a communication circuit protection circuit and an air conditioner.
Background
At present, in a traditional bus system without an internal power supply, for example, an HBS communication system, a power supply mode is to supply power to a communication line part by conducting an external power supply through a communication line, as shown in fig. 1, two +12v power supplies are respectively connected to two differential mode signal buses through a resistor and a common mode inductor.
Because of the high-frequency change of the power supply system, the communication power supply mode can influence an external communication circuit due to the fact that whether the power supply works normally or not, and meanwhile, the maintenance cost is increased. The problems are that: firstly, the communication circuit architecture needs to strictly consider the problem of wrong wiring and mixing; secondly, because of lack of detection and protection means in the communication circuit, the requirements on withstand voltage/power specification of the used components are improved, and the cost is increased; and again, as the electrical safety requirements are also improved, the difficulty of plate distribution and potential safety hazards are increased.
Therefore, how to cope with the power abnormality of the communication circuit is a technical problem to be solved.
Disclosure of Invention
The application aims to solve the problems, and under the condition of not changing the basic architecture of the communication circuit, the communication self power supply is utilized to complete the detection and control of the communication, so that the adaptability and the safety of the communication circuit are improved.
The purpose of the application is to provide a communication circuit protection circuit and an air conditioner, so as to solve the technical problem of coping with power supply abnormality of a communication circuit in the prior art.
In order to achieve the above purpose, the following technical solutions are adopted in the embodiments of the present application.
In a first aspect, an embodiment of the present application provides a protection circuit for a communication circuit, including a serial bus, a common-mode inductor, a detection signal circuit, and a protection signal circuit, where the serial bus is connected to the common-mode inductor, the common-mode inductor is connected to a power supply through the protection signal circuit, and the common-mode inductor is connected to the detection signal circuit;
the detection signal circuit is used for generating a detection abnormal signal when the power supply is abnormal;
the protection signal circuit is used for cutting off the loop of the power supply and the common mode inductor according to the detection abnormal signal.
Optionally, the communication circuit protection circuit further includes a control unit, the detection signal circuit and the protection signal circuit are both connected to the control unit, and the control unit is used for generating a protection signal according to the detection abnormal signal. The protection signal is used for driving the protection signal circuit.
Optionally, the protection signal circuit includes a trip protection switching tube.
The control end of the tripping protection switch tube is connected with the protection signal end and is used for receiving the protection signal; the controlled end of the tripping protection switching tube is connected between the common mode inductor and the power supply; the trip protection switching tube is used for cutting off the connection between the power supply and the common mode inductor when a protection signal appears.
Optionally, the protection signal circuit further comprises a protection signal switching tube.
The control end of the tripping protection switch tube is connected with the protection signal end through the protection signal switch tube: the control end of the protection signal switching tube is electrically connected with the protection signal end; the controlled end of the protection signal switching tube is respectively and electrically connected with the power supply and the control end of the tripping protection switching tube; the first controlled end and the second controlled end of the tripping protection switching tube are connected between the common mode inductor and the ground.
The protection signal switching tube is used for controlling the tripping protection switching tube to cut off the connection between the ground of the power supply and the common mode inductor when a protection signal appears.
Optionally, the protection signal circuit further comprises a control signal switching tube.
The control end of the control signal switching tube is electrically connected with the control signal end.
The controlled end of the protection signal switching tube is electrically connected with the power supply through the controlled end of the control signal switching tube.
And the control signal switching tube is used for controlling the tripping protection switching tube to be normally conducted when a control signal appears.
Optionally, the serial bus includes a first line and a second line, and the common mode inductor includes a first inductor and a second inductor; the first line is connected to the power supply through the first inductor, the second line is connected to the first controlled end of the tripping protection switch tube through the second inductor, and the second controlled end of the tripping protection switch tube is grounded.
The control end of the tripping protection switch tube is respectively and electrically connected with the first controlled end of the protection signal switch tube and the second controlled end of the control signal switch tube, the second controlled end of the protection signal switch tube is grounded, and the first controlled end of the control signal switch tube is electrically connected with the power supply.
Optionally, the protection signal circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor.
The control end of the control signal switching tube is electrically connected with the control signal end through the first resistor, the first controlled end of the control signal switching tube is electrically connected with the power supply through the third resistor, the control end of the protection signal switching tube is electrically connected with the protection signal end through the second resistor, the fourth resistor is connected between the second controlled end of the tripping protection switching tube and the control end of the protection signal switching tube, the fifth resistor is connected between the second controlled end and the control end of the tripping protection switching tube, and the second controlled end of the tripping protection switching tube is grounded through the sixth resistor.
Optionally, the detection signal circuit includes a first optocoupler and a second optocoupler, and the common-mode inductor includes a first inductor and a second inductor; the light emitting diode of the first optical coupler and the light emitting diode of the second optical coupler are connected between the first inductor and the second inductor, and the directions of the light emitting diode of the first optical coupler and the light emitting diode of the second optical coupler are opposite; the output end of the first optical coupler and the output end of the second optical coupler are both connected to the detection signal end.
Optionally, the detection signal circuit further includes a ninth resistor and a tenth resistor.
The second inductor is connected with the anode of the light-emitting diode of the first optocoupler, the cathode of the light-emitting diode of the first optocoupler is connected with the first end of the ninth resistor, and the second end of the ninth resistor is connected with the first inductor; the first end of the ninth resistor is connected with the anode of the light-emitting diode of the second optocoupler, and the cathode of the light-emitting diode of the second optocoupler is connected with the second inductor; the tenth resistor is connected with the light emitting diode of the second optocoupler in parallel.
In a second aspect, an embodiment of the present application provides an air conditioner, including the communication circuit protection circuit of the first aspect, wherein the serial bus is an HBS communication bus.
Compared with the prior art, the application has the following beneficial effects:
in the communication circuit protection circuit provided by the embodiment of the application, the detection signal circuit can detect that the power supply is abnormal, and the protection signal circuit cuts off the loop of the power supply and the common mode inductance when the power supply is abnormal, so that the loop where the bus is located is disconnected, the bus is powered off, and therefore, the slave module communicated on the bus cannot be damaged by the abnormal power supply.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art external power supply for powering a communication line;
fig. 2 is a schematic diagram of a protection circuit of a communication circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a communication circuit protection circuit with a control unit according to an embodiment of the present application;
fig. 4 is a schematic diagram of an implementation of a protection signal circuit including a trip protection switching tube according to an embodiment of the present application;
fig. 5 is a schematic diagram of an implementation of a protection signal circuit including a protection signal switching tube according to an embodiment of the present application;
fig. 6 is a schematic diagram of an implementation of a protection signal circuit including a control signal switching tube according to an embodiment of the present application.
Reference numerals illustrate:
101-detection signal circuit
102-protection signal circuit
103-power supply
104-control unit
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. The following embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present application, it should be noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The term "coupled" is to be interpreted broadly, as being a fixed connection, a removable connection, or an integral connection, for example; can be directly connected or indirectly connected through an intermediate medium.
In the existing bus system without an internal power supply, the power supply is supplied by an external power supply, but risks can occur under the condition of abnormal power supply.
In order to overcome the above problems, referring to fig. 2, the embodiment of the present application provides a protection circuit for a communication circuit, which includes a serial bus, a common mode inductance L2, a detection signal circuit 101 and a protection signal circuit 102.
The serial bus is connected with the slave module and the communication chip, and the slave module and the communication chip are communicated through the serial bus. A common mode noise canceling inductance L1 may also be provided on the serial bus.
The two wires connected to the power supply 103 in the figure can be understood as positive and negative, respectively, or Vcc terminal and ground. When the power supply works normally, current flows from one end of the power supply to the slave module through one inductor of the common-mode inductor and one bus of the serial buses, and then flows from the other bus of the serial buses and the other inductor of the common-mode inductor to the other end of the power supply to form a loop.
The serial bus is connected to a common-mode inductance L2, the common-mode inductance L2 is connected to a power supply 103 through a protection signal circuit 102, and the common-mode inductance is connected to a detection signal circuit 101.
The detection signal circuit 101 is configured to generate a detection abnormality signal when the power supply is abnormal.
The protection signal circuit 102 is used to cut off the loop of the power supply and the common mode inductance when the protection signal appears.
Therefore, the detection signal circuit can detect that the power supply is abnormal, and when the power supply is abnormal, a detection abnormal signal is generated, and then a protection signal can be generated to drive the protection signal circuit to disconnect the loop of the power supply and the common mode inductor, so that the loop where the bus is located is disconnected, the bus is powered off, and each module of communication on the bus is disconnected from the power supply, so that a slave module of communication on the bus cannot be damaged by the abnormal power supply.
As in fig. 3, a control unit may be provided that performs logic to: generating a protection signal according to the detected abnormal signal. The detection signal circuit 101 and the protection signal circuit 102 are both connected to the control unit 104. The control unit 104 may be a single-chip microcomputer.
As shown in fig. 4, the protection signal circuit 102 may include a trip protection switching tube Q3.
The connection relation of the tripping protection switch tube Q3 is as follows: the control end of the tripping protection switch tube Q3 is connected with the protection signal end. The controlled end of the tripping protection switch tube Q3 is connected to the common mode inductance L2 and the loop of the power supply. The trip protection switching tube Q3 is used to cut off the loop of the power supply and the common mode inductance.
As shown in fig. 5, the protection signal circuit 102 may further include a protection signal switching tube Q2.
In this way, the control end of the tripping protection switch tube Q3 is not directly connected to the protection signal end, but is connected to the protection signal end through the protection signal switch tube Q2: the control end of the protection signal switching tube Q2 is electrically connected with the protection signal end. The first controlled end of the protection signal switching tube Q2 is electrically connected with the power supply 103 and the control end of the tripping protection switching tube Q3, and the second controlled end of the protection signal switching tube Q2 is grounded.
The first controlled terminal and the second controlled terminal of the trip protection switching tube Q3 are connected between the common mode inductance L2 and ground. Namely, when the first controlled terminal and the second controlled terminal of the trip protection switching tube Q3 are conducted, the common mode inductance L2 and the ground are conducted to form a loop. When the first controlled end and the second controlled end of the tripping protection switch tube Q3 are cut off, the common mode inductance L2 is disconnected from the ground, and no loop is formed.
As shown in fig. 6, the protection signal circuit 102 further includes a control signal switching tube Q1.
The control end of the control signal switching tube Q1 is electrically connected with the control signal end. The first controlled end of the protection signal switching tube Q2 is electrically connected to the power supply 103 through the controlled end of the control signal switching tube Q1.
Thus, when the bus circuit needs a power supply, the control signal controls the two controlled ends of the control signal switching tube Q1 to be conducted, so that the first controlled end of the protection signal switching tube Q2 is communicated with the power supply 103 through the controlled end of the control signal switching tube Q1, and the electric potential can be conducted from the first controlled end of the protection signal switching tube Q2 to the control end of the tripping protection switching tube Q3, so that the tripping protection switching tube Q3 is conducted, and the common-mode inductor L2 is communicated with the ground to form a loop.
When protection is needed, the protection signal can lead the protection signal switching tube Q2 to be conducted, and the control end of the tripping protection switching tube Q3 is grounded through the protection signal switching tube Q2, so that the tripping protection switching tube Q3 cannot be conducted, namely, a loop is cut off, and protection is realized.
As can be seen in fig. 6, the serial bus may include a first line (lower one in the figure), a second line (upper one in the figure), and the common mode inductance includes a first inductance (upper inductance in the figure) and a second inductance (lower inductance in the figure).
The first line is connected to the power supply 103 through a first inductor, the second line is connected to a first controlled terminal of the trip protection switching tube Q3 through a second inductor, and a second controlled terminal of the trip protection switching tube Q3 is grounded.
The control end of the tripping protection switch tube Q3 is respectively and electrically connected with the first controlled end of the protection signal switch tube Q2 and the second controlled end of the control signal switch tube Q1, the second controlled end of the protection signal switch tube Q2 is grounded, and the first controlled end of the control signal switch tube Q1 is electrically connected with the power supply 103.
During normal operation, current flows from the power supply +12V to the slave module through the diode, the resistor R11, the first inductor and the first line, and then flows to the ground through the second line, the second inductor and the tripping protection switch tube Q3 to form a loop.
In the embodiment of fig. 6, the protection signal circuit 102 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7.
The resistor has the following connection relation: the control end of the control signal switching tube Q1 is electrically connected with the control signal end through a first resistor R1, the first controlled end of the control signal switching tube Q1 is electrically connected with the power supply 103 through a third resistor R3, the control end of the protection signal switching tube Q2 is electrically connected with the protection signal end through a second resistor R2, a fourth resistor R4 is connected between the second controlled end of the tripping protection switching tube Q3 and the control end of the protection signal switching tube Q2, a fifth resistor R5 is connected between the second controlled end and the control end of the tripping protection switching tube Q3, and the second controlled end of the tripping protection switching tube Q3 is grounded through a sixth resistor R6 and a seventh resistor R7. The sixth resistor R6 and the seventh resistor R7 are connected in parallel.
The fourth resistor R4 may also conduct a protection signal to the second controlled terminal of the trip protection switching tube Q3 to better turn off the trip protection switching tube Q3.
Fig. 6 also shows an embodiment of the detection signal circuit 101, where the detection signal circuit 101 includes a first optocoupler O1 and a second optocoupler O2, and the common-mode inductance includes a first inductance and a second inductance. The light emitting diode of the first optical coupler O1 and the light emitting diode of the second optical coupler O2 are connected between the first inductor and the second inductor, and the directions of the light emitting diode of the first optical coupler O1 and the light emitting diode of the second optical coupler O2 are opposite. The output end of the first optical coupler O1 and the output end of the second optical coupler O2 are both connected to the detection signal end. The anode output end is connected with the detection signal end and connected with a resistor R8 to provide detection signals for the power supply +5V, the cathode output end is grounded, and the anode output end is connected with the power supply +5V, the cathode output end is connected with the detection signal end and grounded through a resistor.
Because the direction of the light emitting diode of the first optical coupler O1 is opposite to that of the light emitting diode of the second optical coupler O2, the optical coupler can be turned on to recognize that the current flows from the first inductor to the second inductor or from the second inductor to the first inductor. Namely, the effect of no polarity of the bus is realized.
The detection signal circuit 101 in fig. 6 further includes a ninth resistor R9 and a tenth resistor R10. Can play the roles of current limiting, voltage dividing and protecting the optocoupler.
The second inductor is connected with the anode of the light-emitting diode of the first optocoupler O1, the cathode of the light-emitting diode of the first optocoupler O1 is connected with the first end of the ninth resistor R9, and the second end of the ninth resistor R9 is connected with the first inductor. The first end of the ninth resistor R9 is connected with the anode of the light-emitting diode of the second optocoupler O2, and the cathode of the light-emitting diode of the second optocoupler O2 is connected with the second inductor. The tenth resistor R10 is connected in parallel with the light emitting diode of the second optocoupler O2.
Based on the above embodiment, the embodiment of the present application further provides an air conditioner, including the above communication circuit protection circuit, wherein the serial bus is an HBS communication bus.
In general, the present application proposes a communication circuit protection circuit and an air conditioner. The circuit comprises a serial bus, a common mode inductor, a detection signal circuit and a protection signal circuit. The detection signal circuit can detect that the power supply is abnormal, and the protection signal circuit cuts off the loop of the power supply and the common mode inductance when the power supply is abnormal, so that the bus is disconnected from the loop of the power supply, and the bus is powered off, so that a slave module communicated on the bus cannot be damaged by the abnormal power supply.
The above-described embodiments of the apparatus and system are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the objectives of the present embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A communication circuit protection circuit, which is characterized by comprising a serial bus, a common mode inductor (L2), a detection signal circuit (101) and a protection signal circuit (102), wherein the serial bus is connected to the common mode inductor (L2), the common mode inductor (L2) is connected to a power supply (103) through the protection signal circuit (102), and the common mode inductor is connected to the detection signal circuit (101);
the detection signal circuit (101) is used for generating a detection abnormal signal when the power supply is abnormal;
the protection signal circuit (102) is used for cutting off a loop of the power supply and the common mode inductor according to the abnormal detection signal.
2. The communication circuit protection circuit according to claim 1, further comprising a control unit (104), wherein the detection signal circuit (101) and the protection signal circuit (102) are both connected to the control unit (104), and the control unit (104) is configured to generate a protection signal for driving the protection signal circuit (102) according to the detection abnormality signal.
3. The communication circuit protection circuit according to claim 1, wherein the protection signal circuit (102) comprises a trip protection switching tube (Q3);
the control end of the tripping protection switch tube (Q3) is connected with a protection signal end; the controlled end of the tripping protection switch tube (Q3) is connected to the common mode inductor (L2) and the loop of the power supply; the trip protection switching tube (Q3) is used to cut off the loop of the power supply and the common mode inductance.
4. A communication circuit protection circuit according to claim 3, wherein the protection signal circuit (102) further comprises a protection signal switching tube (Q2);
the control end of the tripping protection switch tube (Q3) is connected with the protection signal end through the protection signal switch tube (Q2): the control end of the protection signal switching tube (Q2) is electrically connected with the protection signal end; the first controlled end of the protection signal switching tube (Q2) is electrically connected with the power supply (103) and the control end of the tripping protection switching tube (Q3), and the second controlled end of the protection signal switching tube (Q2) is grounded;
the first controlled end and the second controlled end of the tripping protection switch tube (Q3) are connected between the common mode inductance (L2) and the ground.
5. The communication circuit protection circuit according to claim 4, wherein the protection signal circuit (102) further comprises a control signal switching tube (Q1);
the control end of the control signal switching tube (Q1) is electrically connected with the control signal end;
the first controlled end of the protection signal switching tube (Q2) is electrically connected with the power supply (103) through the controlled end of the control signal switching tube (Q1).
6. The communication circuit protection circuit of claim 5, wherein the serial bus includes a first line, a second line, and the common mode inductance includes a first inductance and a second inductance; the first line is connected to the power supply (103) through the first inductor, the second line is connected to a first controlled end of the tripping protection switch tube (Q3) through the second inductor, and a second controlled end of the tripping protection switch tube (Q3) is grounded;
the control end of the tripping protection switch tube (Q3) is respectively and electrically connected with the first controlled end of the protection signal switch tube (Q2) and the second controlled end of the control signal switch tube (Q1), the second controlled end of the protection signal switch tube (Q2) is grounded, and the first controlled end of the control signal switch tube (Q1) is electrically connected with the power supply (103).
7. The communication circuit protection circuit according to claim 6, wherein the protection signal circuit (102) includes a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), and a sixth resistor (R6);
the control end of the control signal switch tube (Q1) is electrically connected with the control signal end through the first resistor (R1), the first controlled end of the control signal switch tube (Q1) is electrically connected with the power supply (103) through the third resistor (R3), the control end of the protection signal switch tube (Q2) is electrically connected with the protection signal end through the second resistor (R2), the fourth resistor (R4) is connected between the second controlled end of the trip protection switch tube (Q3) and the control end of the protection signal switch tube (Q2), the fifth resistor (R5) is connected between the second controlled end of the trip protection switch tube (Q3) and the control end, and the second controlled end of the trip protection switch tube (Q3) is grounded through the sixth resistor (R6).
8. The communication circuit protection circuit according to claim 1, wherein the detection signal circuit (101) includes a first optocoupler (O1) and a second optocoupler (O2), and the common-mode inductance includes a first inductance and a second inductance; the light emitting diode of the first optical coupler (O1) and the light emitting diode of the second optical coupler (O2) are connected between the first inductor and the second inductor, and the directions of the light emitting diode of the first optical coupler (O1) and the light emitting diode of the second optical coupler (O2) are opposite; the output end of the first optical coupler (O1) and the output end of the second optical coupler (O2) are both connected to the detection signal end.
9. The communication circuit protection circuit according to claim 8, wherein the detection signal circuit (101) further includes a ninth resistor (R9) and a tenth resistor (R10);
the second inductor is connected with the anode of the light-emitting diode of the first optical coupler (O1), the cathode of the light-emitting diode of the first optical coupler (O1) is connected with the first end of the ninth resistor (R9), and the second end of the ninth resistor (R9) is connected with the first inductor; a first end of the ninth resistor (R9) is connected with a light-emitting diode anode of the second optical coupler (O2), and a light-emitting diode cathode of the second optical coupler (O2) is connected with the second inductor; the tenth resistor (R10) is connected in parallel with the light emitting diode of the second optocoupler (O2).
10. An air conditioner comprising the communication circuit protection circuit of any one of claims 1 to 9, wherein the serial bus is an HBS communication bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320826623.9U CN219372001U (en) | 2023-04-10 | 2023-04-10 | Communication circuit protection circuit and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320826623.9U CN219372001U (en) | 2023-04-10 | 2023-04-10 | Communication circuit protection circuit and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219372001U true CN219372001U (en) | 2023-07-18 |
Family
ID=87147055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320826623.9U Active CN219372001U (en) | 2023-04-10 | 2023-04-10 | Communication circuit protection circuit and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219372001U (en) |
-
2023
- 2023-04-10 CN CN202320826623.9U patent/CN219372001U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2792870C (en) | Electronic control unit | |
| EP3940408B1 (en) | High voltage interlock circuit and detection method thereof | |
| CN104602970B (en) | With the redundant power being coupled with grounding receptacle and the electric component of overcurrent protection module and diode | |
| CN106877277A (en) | A kind of control relay circuit, vehicle control electronics and vehicle | |
| CN219372001U (en) | Communication circuit protection circuit and air conditioner | |
| CN111284340B (en) | Charging device for electric vehicle | |
| CN202678968U (en) | Communication protecting circuit and air conditioner adopting the communication protecting circuit | |
| CN207530528U (en) | Inverter and inverter protection device | |
| CN110739665A (en) | Protection circuit and switching power supply | |
| KR102457266B1 (en) | Electric vehicle for sharing information with a display device | |
| CN114537169A (en) | High-power wireless charger and vehicle-mounted end power supply circuit and control method thereof | |
| CN108471656A (en) | A kind of light source driving circuit and lighting device | |
| CN212845894U (en) | Real-time monitoring circuit for line condition of user electric meter | |
| CN207801568U (en) | Power-supply system with warm connection function | |
| CN207334690U (en) | A kind of illumination system for dust-free clean room | |
| CN212667173U (en) | Control circuit | |
| CN104354660B (en) | Electric energy distribution circuit for automobile | |
| CN219086870U (en) | Emergency power supply module and switching device | |
| CN211046449U (en) | Feedback compensation switching control circuit | |
| CN220896319U (en) | Protection circuit of charging device and charging device | |
| CN112217179B (en) | Switch and protection circuit for exoskeleton robot | |
| EP4272996A1 (en) | Electric vehicle charging controller | |
| CN215264432U (en) | Plug-in type communicable information acquisition controller | |
| CN220510760U (en) | Automatic change-over switch protection control circuit | |
| CN212258913U (en) | Differential amplifier module circuit in short-circuit fault warning device of ammeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |