CN112202442A - Control circuit, control panel, electric equipment and control method - Google Patents

Abstract

The application provides a control circuit, a control panel, electrical equipment and a control method, relates to the technical field of electrical equipment control, and solves the problem that when two communication connectors are connected reversely, a short circuit is formed between a drive board and an intelligent board, so that the drive board or the intelligent board is damaged. The control circuit includes: the circuit comprises a first power supply port, a first ground port, a second power supply port, a second ground port and a rectifier bridge subcircuit. When the power port of the first communication connector is connected with the first power port, the control circuit controls the first power port to reach the second power port through the rectifier bridge sub-circuit, and controls the first ground port to reach the second ground port through the rectifier bridge sub-circuit. When the ground port of the first communication connector is connected with the first power supply port, the control circuit controls the first power supply port to be connected with the second ground port through the rectifier bridge sub-circuit, and controls the first ground port to be connected with the second power supply port through the rectifier bridge sub-circuit.

Description

Control circuit, control panel, electric equipment and control method

The present application claims priority of chinese patent application entitled "a control circuit, control panel, electrical device, and control method" filed by the national intellectual property office on 10/07/2020, application No. 202010665099.2, the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the technical field of electrical equipment control, in particular to a control circuit, a control panel, electrical equipment and a control method.

Background

The intelligent electrical equipment generally comprises a driving board and an intelligent board, and the driving board and the intelligent board can be connected through two communication connectors. When the driving board is positively connected with the intelligent board, normal communication can be realized between the driving board and the intelligent board. As shown in fig. 1, if the driver board and the smart board are connected through a standard four-wire communication connector, when the power port (VDD) of the communication connector a (the communication connector of the driver board in fig. 1) is connected to the power port (VDD1) of the communication connector B (the communication connector of the smart board in fig. 1) and the ground port (GND) of the communication connector a is connected to the ground port (GND1) of the communication connector B, the driver board and the smart board are connected in a forward direction.

Because the two communication connector structures connecting the driving board and the intelligent board are symmetrical, the two communication connectors connecting the driving board and the intelligent board are connected reversely (as shown in fig. 2) during production line production, which results in short circuit of the circuit and damages to the driving board or the intelligent board.

Disclosure of Invention

The application provides a control circuit, a control panel, electrical equipment and a control method, and solves the problem that when two communication connectors of a drive board and an intelligent board are connected reversely, a connecting circuit between the drive board and the intelligent board is short-circuited, so that the drive board or the intelligent board is damaged.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, the present application provides a control circuit comprising: the circuit comprises a first power supply port, a first ground port, a second power supply port, a second ground port and a rectifier bridge subcircuit. The control circuit is configured to: when the power port of the first communication connector (such as the communication connector of the driver board) is connected with the first power port and the ground port of the first communication connector is connected with the first ground port (such as when the driver board is connected with the communication connector of the smart board in a forward direction), the first power port is controlled to reach the second power port through the rectifier bridge sub-circuit, and the first ground port is controlled to reach the second ground port through the rectifier bridge sub-circuit. When the ground port of the first communication connector is connected with the first power supply port and the power supply port of the first communication connector is connected with the first ground port (for example, when the driving board is reversely connected with the communication connector of the smart board), controlling the first power supply port to reach the second ground port through the rectifier bridge sub-circuit; and controls the first ground port to pass through the rectifier bridge sub-circuit to the second power port.

The control circuit provided by the application comprises two pairs of ports, wherein a first pair of ports (a first power supply port and a first grounding port) is a pair of ports connected with a first communication connector, the first pair of ports is a port on a second communication connector (when the first communication connector is a communication connector of a driving board, the second communication connector is a communication connector of an intelligent board), and the first pair of ports is further connected with a second pair of ports (the second power supply port and the second grounding port) through a rectifier bridge sub-circuit. When the first pair of ports is connected with the first communication connector in the forward direction, the control circuit controls the first pair of ports to be connected with the second pair of ports in the forward direction through the rectifier bridge sub-circuit, so that the first communication connector and the second communication connector are in a forward connection state; when the first pair of ports is reversely connected with the second communication connector, the control circuit controls the first pair of ports to be reversely connected with the second pair of ports through the rectifier bridge sub-circuit, and after the two times of reverse connection, the first communication connector and the second communication connector are still in a forward connection state. In this way, the control circuit provided by the present application ultimately controls the first communication connector and the second communication connector to be in the forward connection state, regardless of the initial connection state of the first communication connector and the second communication connector. Therefore, the control circuit that this application provided can effectively avoid because two communication connector connect the anti-connecting circuit short circuit that arouses between drive plate and the intelligent board to lead to the problem that drive plate or intelligent board damaged. Furthermore, the control circuit can correct the reverse connection of the two communication connectors, and the normal work of the driving board and the intelligent board is ensured.

In a second aspect, the present application provides a control board comprising the control circuit as provided in the first aspect.

In a third aspect, the present application provides an electrical appliance comprising the control board as provided in the second aspect.

In a fourth aspect, the present application provides a control method, which may be applied to the control circuit as provided in the first aspect.

For the descriptions of the second, third and fourth aspects in this application, reference may be made to the detailed description of the first aspect; in addition, for the beneficial effects described in the second aspect, the third aspect and the fourth aspect, reference may be made to the beneficial effect analysis of the first aspect, and details are not repeated here.

In the present application, the names of the above-mentioned control means do not limit the devices or functional modules themselves, which may appear by other names in actual implementations. Insofar as the functions of the respective devices or functional blocks are similar to those of the present invention, they are within the scope of the claims of the present application and their equivalents.

These and other aspects of the present application will be more readily apparent from the following description.

Drawings

Fig. 1 is a schematic structural diagram of a forward connection between communication connectors according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a reverse connection between communication connectors according to an embodiment of the present disclosure;

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

fig. 4 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a rectifier bridge sub-circuit according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 8 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

FIG. 9 is a schematic diagram of a digital logic sub-circuit according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of another digital logic sub-circuit according to an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of a further digital logic sub-circuit according to an embodiment of the present application;

FIG. 12 is a schematic diagram of a further digital logic sub-circuit according to an embodiment of the present application;

FIG. 13 illustrates several different types of communication connectors provided by embodiments of the present application;

fig. 14 is a schematic flowchart of a control method according to an embodiment of the present application;

fig. 15 is a flowchart illustrating another control method according to an embodiment of the present application.

Detailed Description

A control circuit, an electrical apparatus, and a control method provided in embodiments of the present application are described in detail below with reference to the accompanying drawings.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects.

Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the present application, the meaning of "a plurality" means two or more unless otherwise specified.

In order to realize the intellectualization of the electrical equipment, the control logic and algorithm functions of an original control board of the electrical equipment are transferred to an intelligent board at present, and the original control board only retains basic functions such as a power supply and a driving function and becomes a power supply and a driving board. Therefore, the algorithm program in the intelligent board can be adjusted in time according to the running state of the electrical equipment, and the intellectualization of the electrical equipment is realized.

Currently, a driving board and an intelligent board in an intelligent electrical device can be connected through two communication connectors. When the driving board is positively connected with the intelligent board, normal communication can be realized between the driving board and the intelligent board. As shown in fig. 1, in order to illustrate the structure of a control circuit in which a conventional driver board and a smart board are connected through a standard four-wire communication connector, when a power supply port (VDD) of a communication connector a (the communication connector of the driver board in fig. 1) is connected to a power supply port (VDD1) of a communication connector B (the communication connector of the smart board in fig. 1) and a ground port (GND) of the communication connector a is connected to a ground port (GND1) of the communication connector B, the driver board and the smart board are connected in a forward direction.

However, since the two communication connectors connecting the driver board and the smart board are symmetrical, they are often connected reversely in production line, and as shown in fig. 2, when the power port (VDD) of the communication connector a (the communication connector of the driver board in fig. 2) is connected to the ground port (GND1) of the communication connector B (the communication connector of the smart board in fig. 2) and the ground port (GND) of the communication connector a is connected to the power port (VDD1) of the communication connector B, the driver board and the smart board are connected reversely. This connection state may cause a short circuit in the connection circuit between the driver board and the smart board, possibly damaging the driver board or the smart board.

To solve the above problems in the prior art, an embodiment of the present application provides a control circuit, including: the circuit comprises a first power supply port, a first ground port, a second power supply port, a second ground port and a rectifier bridge subcircuit. The control circuit can realize self-adaptive connection according to the connection states of the first communication connector and the two ports of the first power supply port and the first ground port, namely, the control circuit provided by the application can finally control the first communication connector and the second communication connector to be in forward connection no matter what the initial connection state of the first communication connector and the second communication connector. Therefore, the control circuit that this application provided can effectively avoid because two communication connector connect the anti-connecting circuit short circuit that arouses between drive plate and the intelligent board to lead to the problem that drive plate or intelligent board damaged. Furthermore, the reverse connection of the two communication connectors can be corrected, and the normal work of the driving board and the intelligent board is ensured.

It should be noted that the control circuit provided in the embodiment of the present application may include a communication connector (hereinafter, referred to as a second communication connector), where the first power port VDD1 and the first ground port GND1 in the control circuit are ports on the second communication connector, that is, the rectifier bridge sub-circuit is connected to the second communication connector without changing the structure of the existing second communication connector, so as to achieve the beneficial effects that can be achieved by the control circuit provided in the embodiment of the present application. Certainly, in practical applications, the control circuit provided in the embodiment of the present application can be directly applied to the second communication connector, that is, on the basis of the structure of the existing second communication connector, the second power port VDD2, the second ground port GND2 and the rectifier bridge sub-circuit are added to achieve the beneficial effects that can be achieved by the control circuit provided in the embodiment of the present application. In the following description of the embodiments of the present application, the second communication connector is included in the control circuit, that is, the structure of the existing second communication connector is not changed.

The control circuit provided in the embodiment of the present application can be applied to a communication connector (corresponding to the second communication connector in the embodiment of the present application) at the non-power supply end. Illustratively, the second communication connector may be a communication connector of the smart board, and the corresponding first communication connector may be a communication connector of the driver board, at which time power is supplied by the driver board. Of course, in practical applications, the power supply may also be provided by the smart board, that is, the second communication connector may be a communication connector of the driving board, and the corresponding first communication connector may be a communication connector of the smart board, which is not limited in this application. Unless otherwise stated, the following descriptions of the embodiments of the present application take the first communication connector as the communication connector of the driving board, and the second communication connector as the communication connector of the smart board as an example.

Fig. 3 shows a schematic structural diagram of a control circuit provided in an embodiment of the present application. As shown in fig. 3, the control circuit includes: the circuit comprises a first power supply port VDD1, a first ground port GND1, a second power supply port VDD2, a second ground port VDD2 and a rectifier bridge subcircuit.

As shown in fig. 4, when the power supply port VDD of the first communication connector is connected to the first power supply port VDD1, and the ground port GND of the first communication connector is connected to the first ground port GND1, the control circuit is configured to: the first power port VDD1 is controlled to pass through the rectifier bridge sub-circuit to the second power port VDD2, and the first ground port GND1 is controlled to pass through the rectifier bridge sub-circuit to the second ground port GND 2.

As shown in fig. 5, when the ground port GND of the first communication connector is connected with the first power port VDD1, and the power port VDD of the first communication connector is connected with the first ground port GND1, the control circuit is configured to: controlling the first power supply port VDD1 to reach the second ground port GND2 through the rectifier bridge subcircuit; and controls the first ground port GND1 through the rectifier bridge subcircuit to the second power supply port VDD 2.

The control circuit controls the connection relationship between the first power port VDD1 and the first ground port GND1 and the second power port VDD2 and the second ground port GND2 according to whether the unidirectional conductive devices are conducted or not.

In one possible implementation, the rectifier bridge sub-circuit includes a first unidirectional current conducting device, a second unidirectional current conducting device, a third unidirectional current conducting device, a fourth unidirectional current conducting device, a first resistor, and a second resistor.

Alternatively, the first unidirectional current conducting device, the second unidirectional current conducting device, the third unidirectional current conducting device and the fourth unidirectional current conducting device may be diodes.

Referring to fig. 6, a schematic diagram of a possible rectifier bridge sub-circuit is provided. As shown in fig. 6, the first power supply port VDD1, the anode of the first unidirectional current conducting device V1, the cathode of the third unidirectional current conducting device V3, and the first end of the first resistor R1 (corresponding to the first end of R1 at the end close to the node a and the second end of R1 at the end close to the node e in fig. 6) are all connected to the first node a; the cathode of the first unidirectional current conducting device V1, the cathode of the second power supply port VDD2 and the cathode of the second unidirectional current conducting device V2 are all connected to the second node b; the anode of the second unidirectional current conducting device V2, the cathode of the fourth unidirectional current conducting device V4 and the first ground port GND1 are all connected to the third node c; the anode of the fourth unidirectional current conducting device V4, the anode of the third unidirectional current conducting device V3, the second ground port GND2 and the first end of the second resistor R2 (corresponding to the second end of R2 at the end close to the e node and the first end of R2 at the end close to GND2 in fig. 6) are all connected to the fourth node d; the second terminal of the first resistor R1 and the second terminal of the second resistor R2 are connected to the fifth node e.

In the control circuit shown in fig. 6, if the power supply port VDD of the first communication connector is connected to the first power supply port VDD1, and the ground port GND of the first communication connector is connected to the first ground port GND1, that is, the first communication connector and the second communication connector are connected by the connection method shown in fig. 4, VDD1 and GND1 correspond to a power supply source, VDD1 is the positive pole of the power supply source, and GND1 is the negative pole of the power supply source. From VDD1 to the first node a, the voltage at the first node a is higher than the fourth node d through the first resistor R1 and the second resistor R2, so the third unidirectional conductive device V3 is not conductive. V1 is turned on because V1 has a positive terminal near the first node a and a negative terminal near the second node b. Since the positive terminal of V4 is connected to the fourth node d whose voltage is positive and the negative terminal is connected to GND1, V4 is on. Since the positive electrode of V2 is connected to GND1 and the negative electrode is connected to VDD2, V2 is not conductive.

It can be seen that when the first communication connector and the second communication connector are connected by the connection manner shown in fig. 4, V1 and V4 in fig. 6 are conductive, V2 and V3 are nonconductive, VDD1 reaches VDD2 through diode V1, and GND1 reaches GND2 through diode V4. The power supply port VDD of the first communication connector finally reaches the second power supply port VDD2 of the control circuit through the first power supply port VDD1 of the second communication connector, and the ground port GND of the first communication connector finally reaches the second ground port GND2 of the control circuit through the first ground port GND1 of the second communication connector. At this time, the first communication connector and the second communication connector are connected in a forward direction.

Similarly, if the ground port GND of the first communication connector is connected to the first power port VDD1, and the power port VDD of the first communication connector is connected to the first ground port GND1, that is, the first communication connector and the second communication connector are connected by the connection method shown in fig. 5, in fig. 6, VDD1 is the negative electrode of the power supply, GND1 is the positive electrode of the power supply, at this time, V1 and V4 are not turned on, and V2 and V3 are turned on. VDD1 (actually connected to GND) reaches GND2 through diode V3, and GND1 (actually connected to VDD) reaches VDD2 through diode V2. The power supply port VDD of the first communication connector is finally connected through the first ground port GND1 of the second communication connector to the second power supply port VDD2 of the control circuit, and the ground port GND of the first communication connector is finally connected through the first power supply port VDD1 of the second communication connector to the second ground port GND2 of the control circuit. At this time, the first communication connector and the second communication connector are still connected in a forward direction.

In addition, when the power supply voltage of the driving board and the intelligent board chip is suitable, the value of the first resistor R1 can be 0, that is, the VDD2 is the same as the Vctc. When the magnitude of the power voltage of the driving board and the smart board chip is not suitable, the second power interface VDD2 and the second ground port of the smart board need to be subjected to power voltage conversion processing to generate the power voltage required by the smart board circuit. Generally, the value of the second resistor R2 ranges from 1K to 10K, and the value of the first resistor R1 can be appropriately selected according to the VDD1 and the voltage division condition.

In the existing communication connector, besides a power port and a ground port, a signal transmitting port and a signal receiving port are also included, and when the connection state of the signal transmitting port and the signal receiving port is correct, normal communication can be realized between devices. Taking the example that the driving board and the smart board are connected through two standard four-wire communication connectors, as shown in fig. 1, when the signal transmitting port (TXD) of the communication connector a (the communication connector of the driving board in fig. 1) is connected with the signal receiving port (RXD1) of the communication connector B (the communication connector of the smart board in fig. 1), and the signal receiving port (RXD) of the communication connector a (the communication connector of the driving board in fig. 1) is connected with the signal transmitting port (TXD1) of the communication connector B (the communication connector of the smart board in fig. 1), normal communication between the driving board and the smart board can be realized. When the communication connector A and the communication connector B are connected reversely (as shown in FIG. 2), normal communication between the driving board and the intelligent board cannot be realized.

Therefore, optionally, the control circuit provided by the present application further includes: the device comprises a first signal receiving port, a first signal transmitting port, a second signal receiving port, a second signal transmitting port and a digital logic sub-circuit.

As shown in fig. 7, when the signal transmitting port TXD of the first communication connector is connected with the first signal receiving port RXD1, and the signal receiving port RXD of the first communication connector is connected with the first signal transmitting port TXD1, the control circuit is configured to: the first signal receiving port RXD1 is controlled to pass through a digital logic sub-circuit to the second signal receiving port RXD2 and the first signal transmitting port TXD1 is controlled to pass through a digital logic sub-circuit to the second signal transmitting port TXD 2.

As shown in fig. 8, when the signal receiving port RXD of the first communication connector is connected with the first signal receiving port RXD1 and the signal transmitting port TXD of the first communication connector is connected with the first signal transmitting port TXD1, the control circuit is configured to: the first signal receiving port RXD1 is controlled to pass through a digital logic sub-circuit to the second signal transmitting port TXD2, and the first signal transmitting port TXD1 is controlled to pass through a digital logic sub-circuit to the second signal receiving port RXD 2.

The digital logic sub-circuit may be a digital circuit composed of a plurality of nand gates and a plurality of not gates, and the control circuit controls the connection relationship of the first signal receiving port RXD1, the first signal transmitting port TXD1, the second signal receiving port RXD2 and the second signal transmitting port TXD2 according to output signals of the plurality of nand gates and the plurality of not gates.

It should be noted that, when the control circuit provided in the embodiment of the present application includes the second communication connector, the first signal transmitting port TXD1 and the first signal receiving port RXD1 are ports on the second communication connector. When the control circuit provided in the embodiment of the present application is applied to the second communication connector, the first signal transmitting port TXD1, the first signal receiving port RXD1, the second signal transmitting port TXD2 and the second signal receiving port RXD2 are all ports on the second communication connector. In the following description of the embodiments of the present application, the control circuit including the second communication connector is still described as an example.

In one possible implementation, the digital logic sub-circuit includes a first nand gate circuit, a second nand gate circuit, a third nand gate circuit, a fourth nand gate circuit, a first not gate circuit, a second not gate circuit, a third not gate circuit, and a fourth not gate circuit.

Referring to fig. 9, a schematic diagram of one possible digital logic sub-circuit configuration is provided. It should be noted that Vctc in fig. 9 corresponds to the fifth node e in fig. 6, that is, the digital logic sub-circuit uses the fifth node e in the rectifier bridge sub-circuit shown in fig. 6 as a port.

When the first communication connector and the second communication connector are connected by the connection method shown in fig. 7, in fig. 6, VDD1 reaches the second power supply port VDD2 through V1, and GND1 reaches GND2 through V4, so the voltages at the two ends of the first resistor R1 and the second resistor R2 are positive voltages, and the voltage at the fifth node e after voltage division is a positive voltage. Therefore, if the first communication connector and the second communication connector are connected by the connection method shown in fig. 7, the Vctc port is at a high level in fig. 9 (corresponding to a logic 1 in the digital circuit).

When the first communication connector and the second communication connector are connected by the connection method shown in fig. 8, the ground port of the first communication connector is actually connected to VDD1, in fig. 6, VDD1 is connected to GND2 by V3, and GND1 is connected to VDD2 by V2, so that the ground port is actually connected to both ends of the first resistor R1 and the second resistor R2, and therefore the voltage of the fifth node e is at a low level. Therefore, if the first communication connector and the second communication connector are connected by the connection method shown in fig. 8, the Vctc port is at a low level (corresponding to a logic 0 in the digital circuit) in fig. 9.

As shown in fig. 9, the first signal receiving port RXD1 and a fifth node Vctc (corresponding to a fifth node e in fig. 6) are connected to an input terminal of the first nand gate circuit D1, the fifth node Vctc is connected to an input terminal of the first not gate circuit D2, and an output terminal of the first not gate circuit D2 and the first signal transmitting port TXD1 are connected to an input terminal of the second nand gate circuit D3; the output end of the first NAND gate D1 and the output end of the second NAND gate D3 are connected to the input end of a second NOT gate D4; an output terminal of the second not gate circuit D4 is connected to the second signal receiving port RXD 2.

In addition, the second signal transmitting port TXD2 is connected to an input terminal of the third not gate circuit D5; the output end D5 and the fifth node Vctc of the third NOT gate circuit are connected to the input end of the third NOT gate circuit D6; the output of the third nand gate D6 is connected to the first signal transmitting port TXD 1.

In addition, the second signal transmitting port TXD2 is also connected to an input terminal of the fourth not gate circuit D7; the output end of the first not gate circuit D2 and the output end of the fourth not gate circuit D7 are connected to the input end of a fourth not gate circuit D8; the output terminal of the fourth nand gate circuit D8 is connected to the first signal receiving port RXD 1.

If the first communication connector and the second communication connector are connected in the connection manner shown in fig. 7, it is determined through the foregoing analysis that the fifth node Vctc is at a high level, i.e., logic 1. As shown in FIG. 9, Vctc and RXD1 are ANDed to obtain RXD 1. Meanwhile, Vctc goes low after passing through D2, and then nand with TXD1 at D3, and the output of D3 goes high. Thus, the phase of the output terminal D1 and the output terminal D3 is still the output terminal D1, so that the output terminal D4 is still RXD1 after the output terminal D1 and the output terminal D3 are inputted into D4. While the output of D4 is connected to RXD2, therefore RXD1 is still connected to RXD 2. After TXD2 passes through D5 and is NAND with Vctc, the output of D6 remains TXD 2. The output of D6 is connected to TXD1, and thus TXD2 remains connected to TXD 1.

Therefore, when the first communication connector and the second communication connector are connected by the connection manner shown in fig. 7, the signal receiving port RXD of the first communication connector finally reaches the second signal transmitting port TXD2 of the control circuit through the first signal transmitting port TXD1 of the second communication connector, and the signal transmitting port TXD of the first communication connector finally reaches the second signal receiving port RXD2 of the control circuit through the first signal receiving port RXD1 of the second communication connector. At this moment, the signal sending port and the signal receiving port between the driving board and the intelligent board are correspondingly connected, and normal communication can be realized between the driving board and the intelligent board.

If the first communication connector and the second communication connector are connected in the connection manner shown in fig. 8, it is determined through the foregoing analysis that the fifth node Vctc is at a low level, i.e., logic 0. As shown in fig. 9, Vctc and RXD1 are anded to low level, and negated to high level, i.e. the output terminal of D1 is high level. Vctc goes high after D2. The output of D2 remains TXD1 after ANDing with TXD 1. The high level of the output end of the D1 and the output end of the D3 are in phase and then are still output ends of the D3, and after the output end of the D3 is not operated by the D4, the output end of the D4 is still TXD 1. While the output of D4 is connected to RXD2, and thus TXD1 is connected to RXD 2. The TXD2 is NAND-ed with the high level of the D2 output after passing through D7, so that the output of D8 remains TXD 2. While the output of D8 is connected to RXD1, and thus TXD2 is connected to RXD 1.

Therefore, when the first communication connector and the second communication connector are connected by the connection manner shown in fig. 8, the signal receiving port RXD of the first communication connector finally reaches the second signal transmitting port TXD2 of the control circuit through the first signal receiving port RXD1 of the second communication connector, and the signal transmitting port TXD of the first communication connector finally reaches the second signal receiving port RXD2 of the control circuit through the first signal transmitting port TXD1 of the second communication connector. At this moment, the signal sending port and the signal receiving port between the driving board and the intelligent board are still correspondingly connected, and normal communication can be realized between the driving board and the intelligent board.

The digital Logic sub-circuit in the embodiment of the present application may adopt a Transistor-Transistor Logic (TTL) digital chip, or may also adopt a Metal-Oxide-Semiconductor (MOS) digital chip. Of course, in practical applications, other electronic devices having the same digital logic subcircuit function may be used.

Illustratively, when the digital logic sub-circuit adopts a TTL digital chip, the two-input NAND gates (corresponding to D1, D3, D6 and D8 in FIG. 9) adopt OC gates with open-collector outputs, and the NOT gates (corresponding to D2, D4, D5 and D7 in FIG. 9) adopt OC gates with open-collector outputs, and other electronic devices with the same digital logic sub-circuit function as the OC gates can be adopted. When the digital logic sub-circuit adopts a MOS digital chip, the two-input nand gate (corresponding to D1, D3, D6 and D8 in fig. 9) adopts an OD gate with open-drain output, and the not gate (corresponding to D2, D4, D5 and D7 in fig. 9) adopts an OD gate with open-drain output, and other electronic devices having the same digital logic sub-circuit function as the OD gate can be adopted. Therefore, the output of the logic circuit chip adopting the OC gate or the OD gate needs a pull-up resistor to ensure the normal output level and the normal operation of the circuit. Therefore, optionally, as shown in fig. 10, the output end of each of the first nand gate D1, the second nand gate D3, the third nand gate D6, the fourth nand gate D8, the first not gate D2, the second not gate D4, the third not gate D5, and the fourth not gate D7 is connected with a pull-up resistor R. In addition, the resistance of the pull-up resistor R connected to the output terminal of each gate circuit may be different. In practical applications, the output terminal of each of the first not gate circuit D2, the second not gate circuit D4, the third not gate circuit D5 and the fourth not gate circuit D7 may determine whether the pull-up resistor R is connected to the output terminal according to the selected logic circuit chip.

In another possible implementation, the digital logic sub-circuit includes a fifth nand gate, a sixth nand gate, a seventh nand gate, an eighth nand gate, a ninth nand gate, a tenth nand gate, a fifth nand gate, and a sixth nand gate.

Referring to fig. 11, a schematic diagram of one possible digital logic sub-circuit configuration is provided. Similarly, Vctc in fig. 11 corresponds to the fifth node e in fig. 6, and if the first communication connector and the second communication connector are connected by the connection method shown in fig. 7, the Vctc port in fig. 11 is at a high level (corresponds to a logic 1 in the digital circuit). If the first communication connector and the second communication connector are connected by the connection method shown in fig. 8, the Vctc port in fig. 11 is at a low level (corresponding to a logic 0 in the digital circuit).

As shown in fig. 11, the first signal receiving port RXD1 and a fifth node Vctc (corresponding to the fifth node e in fig. 6) are connected to the input terminal of the fifth nand gate circuit D9, and the fifth node Vctc is connected to the input terminal of the fifth not gate circuit D10. An output terminal of the fifth not gate circuit D10 and the first signal transmitting port TXD1 are connected to an input terminal of the sixth not gate circuit D11, an output terminal of the fifth not gate circuit D9 and an output terminal of the sixth not gate circuit D11 are connected to an input terminal of the sixth not gate circuit D12, and an output terminal of the sixth not gate circuit D12 is connected to the second signal receiving port RXD 2.

In addition, the second signal transmission port TXD2 and the fifth node Vctc are connected to the input terminal of the seventh nand gate circuit D13, and the output terminal of the seventh nand gate circuit D13 and the fifth node Vctc are connected to the input terminal of the eighth nand gate circuit D14; the output terminal of the eighth nand gate D14 is connected to the first signal transmitting port TXD 1.

In addition, the output terminal of the fifth not gate circuit D10 and the second signal transmitting port TXD2 are connected to the input terminal of the ninth not gate circuit D15; the output end of the ninth nand gate circuit D15 and the output end of the fifth nand gate circuit D10 are connected to the input end of the tenth nand gate circuit D16; the output terminal D16 of the tenth nand gate is connected to the first signal receiving port RXD 1.

If the first communication connector and the second communication connector are connected in the connection manner shown in fig. 7, it is determined through the foregoing analysis that the fifth node Vctc is at a high level, i.e., logic 1. As shown in fig. 11, Vctc and RXD1 are anded to obtain RXD 1. Meanwhile, Vctc goes low after passing through D10, and then nand with TXD1 at D11, and the output of D11 goes high. Thus, the phase of the output terminal D9 and the output terminal D11 is still the output terminal D9, so that the output terminal D12 is still RXD1 after the output terminal D9 and the output terminal D11 are inputted into D12. While the output of D12 is connected to RXD2, therefore RXD1 is still connected to RXD 2. The output end of the D14 is still TXD2 after TXD2 and Vctc are subjected to NAND operations twice through D13 and D14. The output of D14 is connected to TXD1, and thus TXD2 remains connected to TXD 1.

If the first communication connector and the second communication connector are connected in the connection manner shown in fig. 8, it is determined through the foregoing analysis that the fifth node Vctc is at a low level, i.e., logic 0. As shown in fig. 11, Vctc and RXD1 are anded to low level, and negated to high level, i.e. the output terminal of D9 is high level. Vctc goes high after D10. The output of D10 remains TXD1 after ANDing with TXD 1. The high level of the output terminal of the D9 and the phase of the output terminal of the D11 are still the output terminal of D11, and after the output terminal of the D11 is not operated by the D12, the output of the D12 is still the output of D11, that is, the output of the D12 is TXD 1. While the output of D12 is connected to RXD2, and thus TXD1 is connected to RXD 2. The TXD2 is NAND twice with the high level output from D15 and D16 with D10, and the output of D16 remains TXD 2. While the output of D16 is connected to RXD1, and thus TXD2 is connected to RXD 1.

It can be seen that, in the digital logic sub-circuit shown in fig. 11, no matter how RXD1 and TXD1 are connected with the first communication connector, the control circuit can finally control the corresponding connection between the signal transmitting port and the signal receiving port between the first communication connector and the second communication connector, so as to ensure that the normal communication between the driving board and the smart board can be realized.

Alternatively, as shown in fig. 12, any one of two logic circuit chips, i.e., an OC gate and an OD gate, is used for the fifth nand gate D9, the sixth nand gate D11, the eighth nand gate D14 and the tenth nand gate D16, i.e., the output end of each gate is connected with a pull-up resistor R. The seventh nand gate D13, the ninth nand gate D15, the fifth nand gate D10, and the sixth nand gate D12 may be either an OC gate or an OD gate, or other electronic devices having the same digital logic sub-circuit function. Therefore, the output end of each gate circuit can be correspondingly selected whether to be connected with the pull-up resistor R according to the selected logic circuit chip.

It is understood that the embodiment of the present application only shows one possible specific structure of the rectifier bridge sub-circuit and two possible specific structures of the digital logic sub-circuit corresponding to the rectifier bridge sub-circuit. In practical applications, the rectifier bridge sub-circuit and the digital logic sub-circuit can also be implemented by other connection methods, and embodiments of the present application are not listed.

The control circuit provided by the embodiment of the application comprises two pairs of ports, wherein a first pair of ports (a first power supply port and a first ground port) is a pair of ports connected with a first communication connector, the first pair of ports is a port on a second communication connector (when the first communication connector is a communication connector of a driving board, the second communication connector is a communication connector of an intelligent board), and the first pair of ports is further connected with a second pair of ports (a second power supply port and a second ground port) through a rectifier bridge sub-circuit. When the first pair of ports is connected with the first communication connector in the forward direction, the control circuit controls the first pair of ports to be connected with the second pair of ports in the forward direction through the rectifier bridge sub-circuit, so that the first communication connector and the second communication connector are in a forward connection state; when the first pair of ports is reversely connected with the second communication connector, the control circuit controls the first pair of ports to be reversely connected with the second pair of ports through the rectifier bridge sub-circuit, and after the two times of reverse connection, the first communication connector and the second communication connector are still in a forward connection state. In this way, the control circuit provided by the present application ultimately controls the first communication connector and the second communication connector to be in the forward connection state, regardless of the initial connection state of the first communication connector and the second communication connector. Therefore, the control circuit that this application provided can effectively avoid because two communication connector connect the anti-connecting circuit short circuit that arouses between drive plate and the intelligent board to lead to the problem that drive plate or intelligent board damaged. Furthermore, the control circuit can correct the reverse connection of the two communication connectors, and the normal work of the driving board and the intelligent board is ensured.

It should be noted that, in order to more clearly describe the specific structure of the control circuit provided in the present application, in the embodiment of the present application, the first communication connector and the second communication connector are taken as an example of a standard four-wire communication connector with the simplest structure. In practice, there are many types of communication connectors. It is understood that, in the control circuit provided in the embodiments of the present application, the first communication connector and the second communication connector may also be other types of communication connectors. Illustratively, as shown in fig. 13, several different types of existing communication connectors are provided, the structures of the different types of communication connectors are different, fig. 13 (a) and (b) show schematic structural diagrams of two different six-wire communication connectors, (c) shows a schematic diagram of one eight-wire communication connector, and fig. 13 (d), (e), and (f) show schematic diagrams of three nine-wire communication connectors. In the control circuit provided in the embodiment of the present application, the first communication connector and the second communication connector may also be various types of communication connectors such as the above-mentioned six-wire communication connector, eight-wire communication connector, nine-wire communication connector, and the like. The embodiment of the present application does not limit the specific structures of the first communication connector and the second communication connector.

In addition, in the embodiment of the present application, the structures of the first communication connector and the second communication connector are symmetrical, and taking the schematic structural diagram of the forward connection between the driving board and the smart board through the communication connector shown in fig. 7 as an example, the first signal receiving port RXD1 of the second communication connector is close to the first power port VDD1, and the first signal transmitting port TXD1 of the second communication connector is close to the first ground port GND 1. The signal receiving port RXD of the first communication connector is close to the ground port GND, and the signal transmitting port TXD of the first communication connector is close to the power supply port VDD.

The embodiment of the application also provides a control board which comprises the control circuit provided in the embodiment. The control board can be a drive board or an intelligent board.

The embodiment of the application also provides electrical equipment which comprises the control panel provided in the embodiment.

Specifically, the electrical device provided in the embodiment of the present application may be any intelligent electrical device including a driving board and an intelligent board. For example, the electrical equipment provided by the embodiment of the application can be a steam oven, an oven, a microwave oven, an induction cooker, a refrigerator, a washing machine, an air conditioner, a water heater, a range hood, an electric cooker, a dehumidifier, an air filter, a ventilator and the like.

As shown in fig. 14, an embodiment of the present application further provides a control method, which may be applied to the control circuit, and includes S101 to S102:

s101, when the power supply port of the first communication connector is connected with the first power supply port and the ground port of the first communication connector is connected with the first ground port, the control circuit controls the first power supply port to reach the second power supply port through the rectifier bridge sub-circuit and controls the first ground port to reach the second ground port through the rectifier bridge sub-circuit.

S102, when the ground port of the first communication connector is connected with the first power supply port and the power supply port of the first communication connector is connected with the first ground port, the control circuit controls the first power supply port to reach the second ground port through the rectifier bridge sub-circuit; and controls the first ground port to pass through the rectifier bridge sub-circuit to the second power port.

Optionally, as shown in fig. 15, the control method further includes S103-S104:

s103, when the signal sending port of the first communication connector is connected with the first signal receiving port and the signal receiving port of the first communication connector is connected with the first signal sending port, the control circuit controls the first signal receiving port to reach the second signal receiving port through the digital logic sub-circuit and controls the first signal sending port to reach the second signal sending port through the digital logic sub-circuit.

And S104, when the signal receiving port of the first communication connector is connected with the first signal receiving port and the signal sending port of the first communication connector is connected with the first signal sending port, the control circuit controls the first signal receiving port to reach the second signal sending port through the digital logic sub-circuit and controls the first signal sending port to reach the second signal receiving port through the digital logic sub-circuit.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure 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 control circuit, comprising: the rectifier bridge comprises a first power supply port, a first grounding port, a second power supply port, a second grounding port and a rectifier bridge sub-circuit;

the control circuitry configured to:

when the power port of the first communication connector is connected with the first power port and the ground port of the first communication connector is connected with the first ground port, controlling the first power port to reach the second power port through the rectifier bridge sub-circuit and controlling the first ground port to reach the second ground port through the rectifier bridge sub-circuit;

when the ground port of the first communication connector is connected with the first power port and the power port of the first communication connector is connected with the first ground port, the first power port is controlled to reach the second ground port through the rectifier bridge sub-circuit, and the first ground port is controlled to reach the second power port through the rectifier bridge sub-circuit.

2. The control circuit of claim 1, further comprising: the digital logic circuit comprises a first signal receiving port, a first signal sending port, a second signal receiving port, a second signal sending port and a digital logic sub-circuit;

the control circuitry configured to:

when the signal sending port of the first communication connector is connected with the first signal receiving port and the signal receiving port of the first communication connector is connected with the first signal sending port, controlling the first signal receiving port to reach the second signal receiving port through the digital logic sub-circuit and controlling the first signal sending port to reach the second signal sending port through the digital logic sub-circuit;

when the signal receiving port of the first communication connector is connected with the first signal receiving port and the signal sending port of the first communication connector is connected with the first signal sending port, the first signal receiving port is controlled to reach the second signal sending port through the digital logic sub-circuit, and the first signal sending port is controlled to reach the second signal receiving port through the digital logic sub-circuit.

3. The control circuit of claim 2, wherein the rectifier bridge sub-circuit comprises a first unidirectional current conducting device, a second unidirectional current conducting device, a third unidirectional current conducting device, a fourth unidirectional current conducting device, a first resistor, and a second resistor;

the first power supply port, the anode of the first unidirectional conductive device, the cathode of the third unidirectional conductive device and the first end of the first resistor are all connected to a first node; the cathode of the first unidirectional current conducting device, the cathode of the second power supply port and the cathode of the second unidirectional current conducting device are connected to a second node; the anode of the second unidirectional current conducting device, the cathode of the fourth unidirectional current conducting device and the first grounding port are connected to a third node; the positive electrode of the fourth unidirectional current conducting device, the positive electrode of the third unidirectional current conducting device, the second grounding port and the first end of the second resistor are all connected to a fourth node; the second ends of the first and second resistors are connected to a fifth node.

4. The control circuit of claim 3, wherein the digital logic subcircuit includes a first NAND gate circuit, a second NAND gate circuit, a third NAND gate circuit, a fourth NAND gate circuit, a first NOT gate circuit, a second NOT gate circuit, a third NOT gate circuit, and a fourth NOT gate circuit;

the first signal receiving port and the fifth node are connected to the input end of the first NAND gate circuit; the fifth node is connected to an input terminal of the first not gate circuit; the output end of the first NOT gate circuit and the first signal sending port are connected to the input end of the second NOT gate circuit; the output end of the first NAND gate circuit and the output end of the second NAND gate circuit are connected to the input end of the second NAND gate circuit; the output end of the second NOT gate circuit is connected to the second signal receiving port;

the second signal transmitting port is connected to an input end of the third not gate circuit; the output end and the fifth node of the third NOT gate circuit are connected to the input end of the third NOT gate circuit; the output end of the third NAND gate circuit is connected to the first signal transmitting port;

the second signal transmitting port is also connected to the input end of the fourth NOT gate circuit; the output end of the first NOT gate circuit and the output end of the fourth NOT gate circuit are connected to the input end of the fourth NOT gate circuit; the output end of the fourth NAND gate circuit is connected to the first signal receiving port.

5. The control circuit of claim 4, wherein a pull-up resistor is connected to an output of each of the first NAND gate circuit, the second NAND gate circuit, the third NAND gate circuit, the fourth NAND gate circuit, the first NOT gate circuit, the second NOT gate circuit, the third NOT gate circuit, and the fourth NOT gate circuit.

6. The control circuit of claim 3, wherein the digital logic subcircuit includes a fifth NAND gate circuit, a sixth NAND gate circuit, a seventh NAND gate circuit, an eighth NAND gate circuit, a ninth NAND gate circuit, a tenth NAND gate circuit, a fifth NAND gate circuit, and a sixth NAND gate circuit;

the first signal receiving port and the fifth node are connected to the input end of the fifth NAND gate circuit; the fifth node is connected to an input terminal of the fifth not gate circuit; the output end of the fifth not gate circuit and the first signal sending port are connected to the input end of the sixth not gate circuit; the output end of the fifth NAND gate circuit and the output end of the sixth NAND gate circuit are connected to the input end of the sixth NAND gate circuit; an output end of the sixth not gate circuit is connected to the second signal receiving port;

the second signal transmitting port and the five nodes are connected to the input end of the seventh NAND gate circuit; the output end of the seventh NAND gate circuit and the five nodes are connected to the input end of the eighth NAND gate circuit; the output end of the eighth NAND gate circuit is connected to the first signal transmitting port; the output end of the fifth not gate circuit and the second signal sending port are connected to the input end of the ninth not gate circuit; the output end of the ninth NAND gate circuit and the output end of the fifth NAND gate circuit are connected to the input end of the tenth NAND gate circuit; an output end of the tenth nand gate circuit is connected to the first signal receiving port.

7. The control circuit according to claim 6, wherein a pull-up resistor is connected to an output terminal of each of the fifth NAND gate circuit, the sixth NAND gate circuit, the seventh NAND gate circuit, the eighth NAND gate circuit, the ninth NAND gate circuit, the tenth NAND gate circuit, the fifth NAND gate circuit, and the sixth NAND gate circuit.

8. A control board comprising a control circuit according to any one of claims 1 to 7.

9. An electrical appliance comprising a control panel as claimed in claim 8.

10. A control method, characterized by being applied to a control circuit according to any one of claims 1-7.

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