CN111856337A - 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 connecting circuit between a drive board and an intelligent board is short-circuited, so that the drive board or the intelligent board is damaged. The control circuit includes: the device comprises a first power supply port, a first ground port, a second power supply port, a second ground port and a detection branch. The first power supply port is connected with a first node of the detection branch, and the first grounding port is connected with a second node of the detection branch. The control circuit is configured to: when the electric potential of the first node is lower than that of the second node, controlling the first node to be connected with the second ground port and controlling the second node to be connected with the second power supply port; when the potential of the first node is higher than that of the second node, the first node is controlled to be connected with the second power supply port, and the second node is controlled to be connected with the second ground port.

Description

Control circuit, control panel, electric equipment and control method

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 device comprises a first power supply port, a first ground port, a second power supply port, a second ground port and a detection branch. The first power supply port is connected with a first node of the detection branch, and the first grounding port is connected with a second node of the detection branch. The control circuit is configured to: when the electric potential of the first node is lower than that of the second node, controlling the first node to be connected with the second ground port and controlling the second node to be connected with the second power supply port; when the potential of the first node is higher than that of the second node, the first node is controlled to be connected with the second power supply port, and the second node is controlled to be connected with the second ground port.

In the control circuit provided by the present application, the connection state of the communication connector in the control circuit or the communication connector (hereinafter collectively referred to as a first communication connector) to which the control circuit is applied and another communication connector (hereinafter collectively referred to as a second communication connector) can be determined according to the potentials of the two nodes of the detection branch. Since the first power port is connected with the first node of the detection branch and the first ground port is connected with the second node of the detection branch, when the potential of the first node is higher than that of the second node, it indicates that the power port of the second communication connector is connected with the first power port, and the ground port of the second communication connector is connected with the first ground port, so that the second communication connector and the first communication connector are in a forward connection state. At this time, the control circuit controls the first node to be connected with the second power port and controls the second node to be connected with the second ground port, that is, the forward connection state between the second communication connector and the first communication connector is maintained. Conversely, when the potential of the first node is lower than the potential of the second node, it indicates that the ground port of the second communication connector is connected to the first power port, and the power port of the second communication connector is connected to the first ground port, the second communication connector and the first communication connector are in a reverse connection state. At this time, the control circuit controls the first node to be connected with the second ground port and controls the second node to be connected with the second power supply port. In this way, the power port of the second communication connector finally reaches the second power port through the first ground port, while the ground port of the second communication connector finally reaches the second ground port through the first power port. That is, the control circuit may modify the second communication connector and the first communication connector connected in the reverse direction to be connected in the forward direction.

In summary, the control circuit can realize that the second communication connector and the first communication connector are finally controlled to be in forward connection no matter what the initial connection state of the second communication connector and the first communication connector is. 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. The control method comprises the following steps: determining the high and low of the electric potentials of a first node and a second node of a detection branch circuit; and controlling the connection state between the detection branch and the second power supply port and between the detection branch and the second ground port according to the potential of the first node and the potential of the second node.

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 a driving board and a smart board through a communication connector according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a reverse connection between a driving board and a smart board through a communication connector according to an embodiment of the present application;

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 detection branch according to an embodiment of the present application;

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

fig. 10 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 11 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 12 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 13 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 14 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

fig. 15 is a schematic structural diagram of a forward connection between a driver board and a smart board through a communication connector according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of another reverse connection between a driving board and a smart board through a communication connector according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

Fig. 18 is a schematic structural diagram of another control circuit provided in the embodiment of the present application;

FIG. 19 illustrates several different types of communication connectors provided by embodiments of the present application;

fig. 20 is a schematic flowchart of a control method according to an embodiment of the present application;

fig. 21 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 the conventional driver board and smart board connected by a standard four-wire communication connector, when the power supply port VDD of the communication connector a (the communication connector of the driver board in fig. 1) is connected to the power supply 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 the 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, where the control circuit includes a first power port, a first ground port, a second power port, a second ground port, and a detection branch. The first power supply port is connected with a first node of the detection branch, and the first grounding port is connected with a second node. The control circuit provided by the application can finally control the second communication connector and the first communication connector to be in a forward connection state no matter the initial connection state of the second communication connector and the first 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.

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 GND2 and a detection branch. The first power port VDD1 is connected to the first node (a) of the sensing branch, and the first ground port GND1 is connected to the second node (b) of the sensing branch.

Specifically, the control circuit is configured to: when the potential of the first node (a) is lower than the potential of the second node (b), the first node (a) of the control sensing branch is connected with the second ground port GND2, and the second node (b) of the control sensing branch is connected with the second power supply port VDD 2; when the potential of the first node (a) is higher than the potential of the second node (b), the first node (a) of the control sensing branch is connected with the second power port VDD2, and the second node (b) of the control sensing branch is connected with the second ground port GND 2.

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 first communication connector), where the first power port VDD1 and the first ground port GND1 in the control circuit are ports on the first communication connector, that is, the beneficial effects that can be achieved by the control circuit provided in the embodiment of the present application are achieved by connecting the detection branch to the first communication connector without changing the structure of the existing first communication connector. Certainly, in practical applications, the control circuit provided in the embodiment of the present application can be directly applied to the first communication connector, that is, on the basis of the structure of the existing first communication connector, the second power port VDD2, the second ground port GND2 and the detection branch 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 control circuit including the first communication connector, that is, the structure of the existing first communication connector is not modified, and the description will be given by way of example.

Since the first power supply port VDD1 is connected to the first node (a) and the first ground port GND1 is connected to the second node (b), when the potential of the first node (a) is lower than the potential of the second node (b), it indicates that the first communication connector and another communication connector (hereinafter, collectively referred to as a second communication connector) are in a reverse connection state. Conversely, when the potential of the first node (a) is higher than the potential of the second node (b), it indicates that the second communication connector and the first communication connector are in a forward connection state.

As shown in fig. 4, a schematic diagram of a possible forward connection between the second communication connector and the first communication connector is provided. The power port VDD of the second communication connector is connected to the first power port VDD1, and the ground port GND of the second communication connector is connected to the firstground port GND 1. Thus, the first power port VDD1 corresponds to the positive power supply and the first ground port GND1 corresponds to the negative power supply, and the potential of the first node (a) is higher than the potential of the second node (b). At this time, the control circuit controls the first node (a) to be connected to the second power port VDD2, and simultaneously controls the second node (b) to be connected to the second ground port GND 2. It can be seen that when the second communication connector is connected to the first communication connector in the forward direction, the power port VDD of the second communication connector finally reaches the second power port VDD2 of the control circuit after passing through the first power port VDD1 and the first node (a), and the ground port GND of the second communication connector finally reaches the second ground port GND2 of the control circuit after passing through the first ground port GND1 and the second node (b).

As shown in fig. 5, a schematic diagram of a possible reverse connection between the second communication connector and the first communication connector is provided. The ground port GND of the second communication connector is connected to the first power port VDD1, and the power port VDD of the second communication connector is connected to the firstground port GND 1. Thus, the first power port VDD1 corresponds to the negative power supply and the first ground port GND1 corresponds to the positive power supply, and the potential of the first node (a) is lower than the potential of the second node (b). At this time, the control circuit controls the first node (a) to be connected to the second ground port GND2, and controls the second node (b) to be connected to the second power port VDD 2. It can be seen that when the second communication connector is reversely connected with the first communication connector, the power port VDD of the second communication connector finally reaches the second power port VDD2 of the control circuit after passing through the first ground port GND1 and the second node (b), and the ground port GND of the second communication connector finally reaches the second ground port GND2 of the control circuit after passing through the first power port VDD1 and the first node (a).

Therefore, the control circuit provided in the embodiment of the present application can control the second communication connector and the first communication connector to be in the forward connection state finally, no matter whether the initial connection state of the second communication connector and the first communication connector is the forward connection state shown in fig. 4 or the reverse connection state shown in fig. 5.

Alternatively, as shown in fig. 6 or fig. 7, the detection branch may include a unidirectional conducting device VD and a switching device connected in series.

It can be understood that, in the embodiment of the present application, specific positions between the unidirectional conducting device VD and the switching device are not limited, and the unidirectional conducting device VD and the switching device VD may be connected in series. As shown in fig. 6, in one possible implementation, the unidirectional current conducting device VD may be located at a side close to the first node (a), and the corresponding switching device may be located at a side close to the second node (b). In another possible implementation, as shown in fig. 7, the unidirectional current conducting device VD may be located at a side close to the second node (b), and the corresponding switching device may be located at a side close to the first node (a).

Alternatively, the unidirectional current conducting device VD may be a diode, with the anode of the diode connected to the second node (b) and the cathode of the diode connected to the first node (a).

Illustratively, as shown in fig. 6, the anode of the diode is indirectly connected to the second node (b) through the switching device, and the cathode of the diode is directly connected to the first node (a).

Illustratively, as shown in fig. 7, the anode of the diode is directly connected to the second node (b), and the cathode of the diode is indirectly connected to the first node (a) through the switching device.

Optionally, the switching device is a relay.

In the dc circuit, the relay may alternatively be a dc relay, since the coil of the dc relay makes the adherence of the contacts of the dc relay more reliable by direct current than the coil of the ac relay makes the adherence of the contacts of the ac relay more reliable by direct current.

Referring to fig. 8, the present embodiment provides a control circuit implemented by a relay K1 and a diode VD. The anode of the diode VD is connected to the second node (b) of the detection branch through the relay K1, and the cathode of the diode VD is connected to the first node (a) of the detection branch. The relay K1 includes two pairs of contacts K1-1 and K1-2. As shown in fig. 8, the second communication connector is connected with the first communication connector in a forward direction, the first power supply port VDD1 corresponds to a positive power supply pole, the first ground port GND1 corresponds to a negative power supply pole, the potential of the first node (a) is higher than that of the second node (b), the diode VD is not conductive, and the coil of the relay K1 connected in series with the diode VD is not energized, so that the two pairs of contacts K1-1 and K1-2 of the relay K1 are both in a normally closed state. At this time, the power port VDD of the second communication connector finally reaches the second power port VDD2 of the control circuit after passing through the first power port VDD1 and the first node (a), and the ground port GND of the second communication connector finally reaches the second ground port GND2 of the control circuit after passing through the first ground port GND1 and the second node (b).

On the contrary, as shown in fig. 9, if the second communication connector is connected in the reverse direction with the first communication connector, the first power port VDD1 corresponds to the negative pole of the power supply, the first ground port GND1 corresponds to the positive pole of the power supply, the potential of the first node (a) is lower than the potential of the second node (b), the diode VD is turned on, the coil of the relay K1 connected in series with the diode VD is energized, so that the normally closed contacts of the two pairs of contacts K1-1 and K1-2 of the relay K1 are opened, and the normally open contacts are closed. At this time, the power port VDD of the second communication connector finally reaches the second power port VDD2 of the control circuit after passing through the first ground port GND1 and the second node (b), and the ground port GND of the second communication connector finally reaches the second ground port GND2 of the control circuit after passing through the first power port VDD1 and the first node (a).

It can be seen that the control circuit implemented by the relay K1 and the diode VD can control the second communication connector and the first communication connector to be finally in the forward connection state, regardless of the initial connection state of the second communication connector and the first communication connector.

In the existing standard communication connector, besides a power port and a ground port, the standard communication connector also comprises a signal transmitting port and a signal receiving port, 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 is connected with the signal transmitting port TXD1 of the communication connector B, normal communication can be realized between the driving board and the smart board. 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, as shown in fig. 10, the control circuit provided in the embodiment of the present application further includes: a first signal transmitting port TXD1, a first signal receiving port RXD1, a second signal transmitting port TXD2 and a second signal receiving port RXD 2. Specifically, a control circuit configured to: when the potential of the first node (a) is lower than that of the second node (b), the first signal transmitting port TXD1 is controlled to reach the second signal receiving port RXD2 through the detection branch circuit, and the first signal receiving port RXD1 is controlled to reach the second signal transmitting port TXD2 through the detection branch circuit; when the potential of the first node (a) is higher than that of the second node (b), the first signal transmitting port TXD1 is controlled to reach the second signal transmitting port TXD2 through the detection branch circuit, and the first signal receiving port RXD1 is controlled to reach the second signal receiving port RXD2 through the detection branch circuit.

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

Referring to fig. 11, the present embodiment provides a control circuit implemented by a relay K1 and a diode VD. The anode of the diode VD is connected to the second node (b) of the detection branch through the relay K1, and the cathode of the diode VD is connected to the first node (a) of the detection branch. The relay K1 comprises four pairs of contacts K1-1, K1-2, K1-3 and K1-4. As shown in fig. 11, the second communication connector is connected to the first communication connector in a forward direction, the signal transmitting port TXD of the second communication connector is connected to the first signal receiving port RXD1, and the signal receiving port RXD of the second communication connector is connected to the first signal transmittingport TXD 1. The first power supply port VDD1 is equivalent to a positive electrode of a power supply, the first ground port GND1 is equivalent to a negative electrode of the power supply, the potential of the first node (a) is higher than that of the second node (b), the diode VD is not conducted, and a coil of the relay K1 connected with the diode VD in series is not electrified, so that four pairs of contacts K1-1, K1-2, K1-3 and K1-4 of the relay K1 are in a normally closed state. At this time, the signal transmitting port TXD of the second communication connector finally reaches the second signal receiving port RXD2 through the normally closed contacts of the first signal receiving ports RXD1 and K1-4, and the signal receiving port RXD of the second communication connector finally reaches the second signal transmitting port TXD2 through the normally closed contacts of the first signal transmitting ports TXD1 and K1-3.

In contrast, as shown in fig. 12, when the second communication connector is reversely connected to the first communication connector, the signal transmitting port TXD of the second communication connector is connected to the first signal transmitting port TXD1, and the signal receiving port RXD of the second communication connector is connected to the first signal receivingport RXD 1. The first power supply port VDD1 is equivalent to a power supply cathode, the first ground port GND1 is equivalent to a power supply anode, the potential of the first node (a) is lower than that of the second node (b), the diode VD is conducted, the coil of the relay K1 connected with the diode VD in series is electrified, the normally closed contacts of the four pairs of contacts K1-1, K1-2, K1-3 and K1-4 of the relay K1 are opened, and the normally open contacts are closed. At this time, the signal transmitting port TXD of the second communication connector finally reaches the second signal receiving port RXD2 through the normally open contacts of the first signal transmitting ports TXD1 and K1-3, and the signal receiving port RXD of the second communication connector finally reaches the second signal transmitting port TXD2 through the normally open contacts of the first signal receiving ports RXD1 and K1-4.

It can be seen that the control circuit implemented by using the relay K1 and the diode VD can be implemented, regardless of the initial connection state of the second communication connector and the first communication connector, the control circuit can control the signal sending port of the second communication connector to finally reach the signal receiving port of the first communication connector, and control the signal receiving port of the second communication connector to finally reach the signal sending port of the first communication connector, that is, the connection states of the signal sending port and the signal receiving port of the two communication connectors are correct. Therefore, the control circuit can effectively avoid the problem that normal communication cannot be realized between the driving board and the intelligent board due to the fact that the two communication connectors are reversely connected.

The control circuit provided in fig. 11 and 12 is implemented by a single relay, and it is understood that in practical applications, the control circuit can also be implemented by a plurality of relays. For example, the diode may be connected to two relays, each of the two relays has two pairs of contacts, wherein the two pairs of contacts of one relay control the connection state of the detection branch to the second power port and the second ground port, and the two pairs of contacts of the other relay control the connection state of the detection branch to the second signal transmission port and the second signal reception port.

It should be noted that the control circuit provided in the embodiments of the present application is implemented at the non-power-supply end of the driving board and the smart board. Illustratively, when the power supply is provided by the driving board, the control circuit is implemented at one end of the smart board, that is, the communication connector of the driving board is the second communication connector in the above embodiment, and the communication connector of the smart board is the first communication connector in the above embodiment. When the intelligent board provides power, the control circuit is implemented at one end of the driving board, that is, the communication connector of the driving board is the first communication connector in the above embodiment, and the communication connector of the intelligent board is the second communication connector in the above embodiment.

Optionally, taking the driving board as an example to provide power, when the power voltage provided by the driving board does not match with the power voltage of the smart board chip, the power voltage conversion processing may be performed at the second power port and the second ground port of the control circuit. Illustratively, as shown in fig. 11 or 12, when the power supply voltage provided by the driving board (corresponding to the second communication connector) does not match the power supply voltage of the smart board (corresponding to the first communication connector) chip, the conversion process of the power supply voltage may be performed at the VDD2 terminal and the GND2 terminal, generating the power supply voltage required by the smart board circuit. Correspondingly, the coil voltage of relay K1 should also be selected to match the voltage ofVDD 1.

As can be seen from the above description, the detection branch in the control circuit provided in the embodiment of the present application is an adaptive circuit on the side that does not provide power (for example, the first communication connector in fig. 11 or 12 is the side that does not provide power), and will eventually adjust to the forward connection state no matter how the first communication connector is connected to the second communication connector. Illustratively, as shown in fig. 13, the adaptation circuit may cause the second communication connector to maintain a forward connection state with the first communication connector when the second communication connector is connected with the first communication connector in a forward direction. As shown in fig. 14, when the second communication connector is connected to the first communication connector in the reverse direction, the adaptive circuit may switch the second communication connector to the first communication connector in the forward direction after two reverse connections.

In the embodiment of the present application, the description is made on the structure of the first communication connector (corresponding to the communication connector B in fig. 1 and fig.) and the second communication connector (corresponding to the communication connector a in fig. 1 and fig. 1) for the standard four-wire communication connector shown in fig. 1 and fig. 2. It is understood that, in practical applications, the structures of the first communication connector and the second communication connector may also be the structures shown in fig. 15 and 16. Fig. 15 is a schematic structural diagram of a forward connection between the second communication connector and the first communication connector, and fig. 16 is a schematic structural diagram of a reverse connection between the second communication connector and the first communication connector. In the structural schematic diagrams shown in fig. 15 and fig. 16, the control circuit provided in the embodiment of the present application is still applicable. As shown in fig. 17, the adaptation circuit implemented by the detection branch may maintain a forward connection state between the second communication connector and the first communication connector when the second communication connector is connected to the first communication connector. As shown in fig. 18, when the second communication connector is connected to the first communication connector in the reverse direction, the adaptive circuit implemented by the detection branch may switch the second communication connector to the first communication connector in the forward direction after two reverse connections.

In the control circuit provided by the present application, the connection state of the communication connector in the control circuit or the communication connector (hereinafter collectively referred to as a first communication connector) to which the control circuit is applied and another communication connector (hereinafter collectively referred to as a second communication connector) can be determined according to the potentials of the two nodes of the detection branch. Since the first power port is connected with the first node of the detection branch and the first ground port is connected with the second node, when the potential of the first node is higher than that of the second node, it indicates that the power port of the second communication connector is connected with the first power port and the ground port of the second communication connector is connected with the first ground port, and then the second communication connector and the first communication connector are in a forward connection state. At this time, the control circuit controls the first node to be connected with the second power port and controls the second node to be connected with the second ground port, that is, the forward connection state between the second communication connector and the first communication connector is maintained. Conversely, when the potential of the first node is lower than the potential of the second node, it indicates that the ground port of the second communication connector is connected to the first power port, and the power port of the second communication connector is connected to the first ground port, the second communication connector and the first communication connector are in a reverse connection state. At this time, the control circuit controls the first node to be connected with the second ground port and controls the second node to be connected with the second power supply port. In this way, the power port of the second communication connector finally reaches the second power port through the first ground port, while the ground port of the second communication connector finally reaches the second ground port through the first power port. That is, the control circuit may modify the second communication connector and the first communication connector connected in the reverse direction to be connected in the forward direction. Therefore, the control circuit provided by the embodiment of the application can realize that the second communication connector and the first communication connector are controlled to be in forward connection finally no matter what the initial connection state of the second communication connector and the first communication connector is. Therefore, the control circuit provided by the embodiment of the application can effectively avoid the problem that the driving board or the intelligent board is damaged due to the fact that the two communication connectors are reversely connected to cause the short circuit of the connecting circuit between the driving board and the intelligent board. 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. 19, several different types of existing communication connectors are provided, the structures of the different types of communication connectors are different, fig. 19 (a) and (b) show schematic structural diagrams of two different six-wire communication connectors, (c) shows a schematic structural diagram of one eight-wire communication connector, and fig. 19 (d), (e), and (f) show schematic structural 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 as an example, the first signal receiving port RXD1 of the first communication connector is close to the first power port VDD1, and the first signal transmitting port TXD1 of the first communication connector is close to the firstground port GND 1. The signal receiving port RXD of the second communication connector is close to the ground port GND, and the signal transmitting port TXD of the second 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.

The electrical equipment provided by the embodiment of the application can be any intelligent electrical equipment comprising 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. 20, an embodiment of the present application further provides a control method, which may be applied to the control circuit described above, and includes S101 to S102:

s101, the control circuit determines the high and low of the electric potentials of the first node and the second node of the detection branch circuit.

S102, the control circuit controls the connection state between the detection branch and the second power supply port and the connection state between the detection branch and the second ground port according to the potential of the first node and the potential of the second node.

Alternatively, as shown in fig. 21, step S102 may include S1021-S1022:

and S1021, when the electric potential of the first node is lower than that of the second node, the control circuit controls the first node to be connected with the second ground port and controls the second node to be connected with the second power supply port.

S1022, when the potential of the first node is higher than the potential of the second node, the control circuit controls the first node to be connected to the second power supply port, and controls the second node to be connected to the second ground port.

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 detection circuit comprises a first power supply port, a first ground port, a second power supply port, a second ground port and a detection branch circuit; the first power supply port is connected with a first node of the detection branch circuit; the first ground port is connected with a second node of the detection branch circuit;

the control circuitry configured to:

controlling the first node to be connected to the second ground port and the second node to be connected to the second power supply port when the potential of the first node is lower than the potential of the second node;

when the potential of the first node is higher than the potential of the second node, controlling the first node to be connected with the second power supply port and controlling the second node to be connected with the second ground port.

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

the control circuitry configured to:

when the potential of the first node is lower than that of the second node, controlling the first signal transmitting port to reach the second signal receiving port through the detection branch and controlling the first signal receiving port to reach the second signal transmitting port through the detection branch;

When the electric potential of the first node is higher than the electric potential of the second node, the first signal transmitting port is controlled to reach the second signal transmitting port through the detection branch, and the first signal receiving port is controlled to reach the second signal receiving port through the detection branch.

3. Control circuit according to claim 1 or 2, characterized in that the detection branch comprises a unidirectional conducting device and a switching device connected in series.

4. The control circuit of claim 3, wherein the unidirectional conducting device is a diode; the anode of the diode is connected to the second node, and the cathode of the diode is connected to the first node.

5. The control circuit of claim 4, wherein the switching device is a relay.

6. A control board comprising a control circuit according to any one of claims 1 to 5.

7. An electrical appliance comprising a control panel as claimed in claim 6.

8. A control method applied to the control circuit according to any one of claims 1 to 5, comprising:

determining the high and low of the electric potentials of a first node and a second node of the detection branch circuit;

And controlling the connection state between the detection branch and the second power supply port and between the detection branch and the second ground port according to the potential of the first node and the potential of the second node.

9. The control method according to claim 8, wherein the controlling the connection state between the detection branch and the second power supply port and the detection branch and the second ground port according to the level of the potential of the first node and the level of the potential of the second node comprises:

controlling the first node to be connected to the second ground port and the second node to be connected to the second power supply port when the potential of the first node is lower than the potential of the second node;

when the potential of the first node is higher than the potential of the second node, controlling the first node to be connected with the second power supply port and controlling the second node to be connected with the second ground port.

10. The control method according to claim 9, wherein the control circuit further comprises: the control method comprises the following steps of:

When the potential of the first node is lower than that of the second node, controlling the first signal transmitting port to reach the second signal receiving port through the detection branch and controlling the first signal receiving port to reach the second signal transmitting port through the detection branch;

when the electric potential of the first node is higher than the electric potential of the second node, the first signal transmitting port is controlled to reach the second signal transmitting port through the detection branch, and the first signal receiving port is controlled to reach the second signal receiving port through the detection branch.

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