KR102465564B1 - Control circuit and device for preventing malfunction - Google Patents

Abstract

Control temperature circuit and device for preventing malfunction according to one aspect of the technical idea of the present invention include at least one communication port for communication with other devices and at least one ground for GND connection with the other device Communication unit including a port; a circuit protection unit that connects the ground port and ground (GND) and outputs an operating signal depending on whether or not the other device is grounded; and a control unit operating according to an operation signal transmitted from the circuit protection unit.

Description

Control circuit and device for preventing malfunction {CONTROL CIRCUIT AND DEVICE FOR PREVENTING MALFUNCTION}

The technical idea of the present invention relates to a control circuit and device for preventing malfunction, and more particularly, to a control circuit and device for preventing malfunction due to noise.

Products such as hybrid boilers, ventilators, and air conditioners work by connecting one device to another.

These devices are wired to communicate with other connected devices, and send and receive data necessary for operation.

When a plurality of devices are wired and communicate with each other, the device or some components inside the device may malfunction due to noise introduced from other devices during product operation.

These malfunctions not only cause problems with the stability of product operation by generating serious errors depending on the degree, but also affect the product itself and cause malfunctions.

In particular, in the case of serial communication through a serial port, when generated noise is not emitted to the outside through a ground line, a malfunction occurs.

An object of the control circuit and device for preventing malfunction according to the technical concept of the present invention is to prevent malfunction due to noise.

An object of the present invention is to provide a control circuit and device for preventing malfunction that can protect the device by periodically checking the ground connection state for emitting noise.

The technical problem to be achieved by the control circuit and device for preventing malfunction according to the technical idea of the present invention is not limited to the above-mentioned problem (s), and another problem (s) not mentioned is to those skilled in the art from the following description. will be clearly understood.

Control temperature circuit and device for preventing malfunction according to one aspect of the technical idea of the present invention include at least one communication port for communication with other devices and at least one ground for GND connection with the other device Communication unit including a port; a circuit protection unit that connects the ground port and ground (GND) and outputs an operating signal depending on whether or not the other device is grounded; and a control unit operating according to an operation signal transmitted from the circuit protection unit.

According to an exemplary embodiment, the communication unit may include a plurality of communication ports for communication with the other device, and the plurality of communication ports may include a transmission port for data transmission and a reception port for data reception. have.

According to an exemplary embodiment, when the circuit protection unit is not connected to the ground with the other device, the controller may transmit a first signal to the control unit to protect the control device.

According to an exemplary embodiment, the communication unit is connected to the circuit protection unit, a ground sensing port for detecting whether or not the ground is connected to the other device, and a physical ground for connecting the ground port of the other device and the ground. Can contain ports.

According to an exemplary embodiment, the circuit protection unit may include a light emitting diode connected to the ground sensing port and emitting light according to whether or not the other device is connected to a ground.

According to an exemplary embodiment, the circuit protection unit is connected to the control unit and the ground, respectively, and when light emitted from the light emitting diode is not received, the control unit protects the control device by providing the first signal to the control unit. can transmit.

According to an exemplary embodiment, the circuit protection unit is connected to the control unit and the ground, respectively, and when receiving light emitted from the light emitting diode, a second signal may be transmitted to the control unit so that the control unit operates normally.

According to an exemplary embodiment, the communication unit may include a ground sensing port connected to the circuit protection unit to detect whether or not a ground connection is made with the other device.

According to an exemplary embodiment, the circuit protection unit may be connected to the ground sensing port and transmit a first signal to the control unit so that the control unit protects the control device when the ground is not connected to the other device.

According to an exemplary embodiment, the circuit protection unit has one side connected to the ground sensing port and the other side connected to the ground, and when a ground port of the other device is connected through the ground sensing port, the ground is connected to the ground. A third signal may be transmitted to the control unit to be connected to the other device through the sensing port.

Control circuits and devices for preventing malfunctions according to embodiments according to the technical idea of the present invention can prevent malfunctions due to noise, enabling stable operation and providing reliable products.

In addition, the present invention can strengthen circuit and device protection by periodically checking the ground connection state.

In order to more fully understand the drawings cited herein, a brief description of each drawing is provided.
1 is a block diagram showing the configuration of a control circuit and device for preventing malfunction according to various embodiments of the present invention.
2 is a conceptual diagram of a configuration of a control circuit for preventing malfunction according to various embodiments of the present invention.
3 to 4 are exemplary diagrams of implementation of a control circuit for preventing malfunction according to various embodiments of the present disclosure.

Since the technical spirit of the present invention may be subject to various changes and may have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail through detailed description. However, this is not intended to limit the technical spirit of the present invention to specific embodiments, and should be understood to include all modifications, equivalents, or substitutes included in the scope of the technical spirit of the present invention.

In describing the technical idea of the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the technical idea of the present invention, the detailed description will be omitted. In addition, numbers (eg, first, second, etc.) used in the description process of this specification are only identifiers for distinguishing one component from another component.

In addition, in this specification, when one component is referred to as “connected” or “connected” to another component, the one component may be directly connected or directly connected to the other component, but in particular Unless otherwise described, it should be understood that they may be connected or connected via another component in the middle.

In addition, terms such as "~ unit", "~ group", "~ character", and "~ module" described in this specification mean a unit that processes at least one function or operation, which includes a processor, a micro Processor (Micro Processor), Application Processor, Micro Controller, CPU (Central Processing Unit), GPU (Graphics Processing Unit), APU (Accelerate Processor Unit), DSP (Digital Signal Processor), ASIC ( It may be implemented by hardware or software, such as an Application Specific Integrated Circuit (FPGA) or a Field Programmable Gate Array (FPGA), or a combination of hardware and software.

In addition, it is intended to make it clear that the classification of components in this specification is merely a classification for each main function in charge of each component. That is, two or more components to be described below may be combined into one component, or one component may be divided into two or more for each more subdivided function. In addition, each component to be described below may additionally perform some or all of the functions of other components in addition to its main function, and some of the main functions of each component may be performed by other components. Of course, it may be dedicated and performed by .

Hereinafter, embodiments according to the technical idea of the present invention will be described in detail in turn.

In the description below, at least one of the first device 100 and the second device 200 may correspond to a control circuit and apparatus for preventing malfunction according to various embodiments of the present invention, and the first device 100 And at least one of the second device 200 may be included in a control circuit and/or apparatus for preventing malfunction. Accordingly, in the following description, the control circuit and apparatus for preventing malfunction will be described as the first device 100, the second device 200, and the like.

1 is a block diagram showing the configuration of a control circuit and device for preventing malfunction according to various embodiments of the present invention.

Referring to FIG. 1 , the first device 100 and the second device 200 may be communicatively connected by wire.

For example, the first device 100 and the second device 200 may be connected through serial communication such as 485 communication. So, the first device 100 and the second device 200 are connected through two RS 485 communication lines (Line A, Line B), and communication can be made between them.

Here, the RS 485 communication method is an extended version of RS 232 and RS 422, and may be a kind of standard serial communication protocol supporting a home network.

The first device 100 and the second device 200 may be devices that are communicatively connected to each other and operate. For example, the first device 100 may be a controller of an outdoor unit, and the second device 200 may be a controller of an indoor unit. Here, the outdoor unit and the indoor unit may be a device that communicates with each other and operates, such as a hybrid boiler or an air conditioner, or a part of the device.

The first device 100 may include a first control unit 110 , a first communication unit 130 and a circuit protection unit 150 .

The first controller 110 may control the operation of the first device 100 or an apparatus including the first device 100 .

The first control unit 110 may control the operation of the first device 100 by receiving an operation signal from the circuit protection unit 150 depending on whether or not the second device 200 connected through communication is grounded.

The first control unit 110 may control the ground connected to the circuit protection unit 150 to be connected to the second device 200 through the first communication unit 130 .

The first communication unit 130 may be communicatively connected to the second communication unit 230 of the second device 200 .

For example, the first communication unit 130 may be connected to the second communication unit 230 through a plurality of communication lines.

This will be described with reference to FIG. 2 .

2 is a conceptual diagram of the configuration of a malfunction prevention circuit according to various embodiments of the present invention.

Referring to FIG. 2 , in the case of 485 communication, the first communication unit 130 includes ports 485A and 485B, and the ports 485A and 485B may be connected to ports 485A and 485B of the second communication unit 230, respectively.

Also, the first communication unit 130 may include a ground port for providing a ground (GND) connection to the second device 200 .

For example, the first communication unit 130 may include a ground sensing port for sensing whether or not the second device 200 is connected to a ground and a physical ground port for connecting a ground line. The ground sensing port of the first communication unit 130 may also be connected to the circuit protection unit 150 to be described later. Accordingly, the first communication unit 130 may be connected to the second communication unit 230 of the second device 200 in a 4-wire manner.

As another example, the first communication unit 130 may include a ground sensing port for sensing whether or not the second device 200 is connected to a ground and providing a ground connection. So, unlike the above-described embodiment, the first communication unit 130 may not include a physical ground port. The ground sensing port of the first communication unit 130 may be connected to the circuit protection unit 150 . Accordingly, the first communication unit 130 may be connected to the second communication unit 230 of the second device 200 in a three-wire manner.

Reference is made to FIG. 1 again.

Lines connected to two ports for communication between the first communication unit 130 and the second communication unit 230 may be referred to as Line A and Line B, respectively. In one embodiment, Line A and Line B may be communication lines corresponding to ports 485A and 485B, respectively.

A line connecting the ports for grounding between the first communication unit 130 and the second communication unit 230 may be referred to as GND.

The circuit protection unit 150 may be connected to the ground (GND) and provide a connection to the ground to the first communication unit 130 . Thus, the circuit protection unit 150 may provide a ground connection to the second device 200 through the first communication unit 130 .

The circuit protection unit 150 may determine whether the second device 200 connected through the first communication unit 130 is connected to ground, and based on whether or not the determination is made, a signal for the operation of the first device 100 may be transmitted to the first It can be transmitted to the control unit 110. For example, the circuit protection unit 150 may transmit a signal according to the determination to a signal input/output port (signal I/O) of the first control unit 110 .

In one embodiment, the circuit protection unit 150 transmits a signal for normal operation of the first device 100 to the first control unit when it is determined that the second device 200 connected through the first communication unit 130 is grounded. (110).

In another embodiment, when it is determined that the second device 200 connected through the first communication unit 130 is not grounded, the circuit protection unit 150 transmits a signal to the first control unit 110 so as to transmit a signal to the first device 200 . (100) can be protected.

The circuit protection unit 150 may be designed in various ways and determine whether the second device 200 is connected to the ground through the first communication unit 130 . This will be described later.

The second device 200 may include a second control unit 210 and a second communication unit 230 .

The second controller 210 may control the operation of the second device 200 or an apparatus including the second device 200 .

The second communication unit 230 may be communicatively connected to the second communication unit 130 of the first device 100 .

For example, the second communication unit 230 may be connected to the first communication unit 130 through a plurality of communication lines.

As an embodiment, referring to FIG. 2 , in the case of 485 communication, the second communication unit 230 includes 485A and 485B ports, and each of the 485A and 485B ports corresponds to the 485A and 485B ports of the first communication unit 130, respectively. can be connected

Also, the second communication unit 230 may include a ground port for connection to a ground (GND) provided from the first device 100 .

For example, the second communication unit 230 may include at least one ground port corresponding to a ground sensing port and a physical ground port of the first communication unit 130 of the first device 100 . Accordingly, the first communication unit 130 may be connected to the second communication unit 230 of the second device 200 in a 4-wire manner.

As another example, unlike the above-described embodiment, the second communication unit 230 may not include a physical ground port. The ground sensing port of the second communication unit 230 may be connected to the first communication unit 130 . Accordingly, the second communication unit 230 may be connected to the first communication unit 130 of the first device 100 in a three-wire manner.

Lines connected to two ports for communication between the first communication unit 130 and the second communication unit 230 may be referred to as Line A and Line B, respectively. In one embodiment, Line A and Line B may be communication lines corresponding to ports 485A and 485B, respectively.

A line connecting the ports for grounding between the first communication unit 130 and the second communication unit 230 may be referred to as GND.

With reference to FIGS. 3 and 4 , specific embodiments will be described.

3 and 4 are exemplary diagrams of implementation of a malfunction prevention circuit according to various embodiments of the present disclosure.

Referring to FIG. 3 , the first communication unit 130 of the first device 100 may include a plurality of ports. The first communication unit 130 may include 485A and 485B ports for 485 communication, and may include a ground sensing (GND Sensing) port and a physical ground (GND) port for ground connection with the second device 200. can

Each of the 485A, 485B, the ground sensing port, and the physical ground port included in the first communication unit 130 may be connected to the 485A, 485B, the ground port, and the physical ground port of the second communication unit 230 of the second device 200, respectively. have. Accordingly, the first device 100 and the second device 200 may share a physical ground.

The ground sensing port of the first communication unit 130 may be connected to the circuit protection unit 150, and the circuit protection unit 150 may sense whether or not the second device 200 is connected to the ground through the ground sensing port. .

For example, the circuit protection unit 150 includes a light emitting diode according to a 12V voltage input, and the light emitting diode may be connected to a ground sensing port of the first communication unit 130 . Therefore, the light emitting diode of the circuit protection unit 150 can emit light while the ground of the second device 200 is connected. Thus, light may be provided to the photodiode in the circuit protection unit 150 . The photodiode may be connected to the base of the transistor so that collector/emitter currents are output according to light received from the light emitting diode. On the other hand, if the ground with the second device 200 is not connected, the light emitting diode does not emit light, and thus the photodiode does not input base current. Accordingly, the collector/emitter current of the transistor is not output, and the voltage connected to the collector of the transistor is applied to the ADC port of the first controller 110 connected to the circuit protection unit 150 . Accordingly, the measured value of the ADC port of the first controller 110 may become High. The first control unit 110 may operate to protect the first device 100 when High is input to the ADC port. As such, the circuit protection unit 150 may determine whether or not the ground connection of the second device 200 connected through the ground sensing port of the first communication unit 130 is connected, and when the ground is not connected, the first device 100 A signal may be transmitted to the first control unit 110 to protect. In addition, the above-described configuration can measure ground connection being disconnected even during the operation of the first device 100 and the second device 200 .

Referring to FIG. 4 , the first communication unit 130 of the first device 100 may include a plurality of ports. The first communication unit 130 may include ports 485A and 485B for 485 communication, and may include a GND sensing port for ground connection with the second device 200 .

Each of the 485A, 485B and the ground sensing port included in the first communication unit 130 may be connected to the 485A, 485B and the ground port of the second communication unit 230 of the second device 200, respectively. The first communication unit 130 may determine whether or not the second device 200 is connected to a ground through the ground sensing port, and may provide a ground connection.

The ground sensing port of the first communication unit 130 may be connected to the circuit protection unit 150, and the circuit protection unit 150 may sense whether or not the second device 200 is connected to the ground through the ground sensing port. . And, as described above, the circuit protection unit 150 may provide a ground connection to the second device 200 through the ground sensing port.

For example, a 5V voltage input included in the circuit protection unit 150 may be connected to a ground sensing port, an ADC port of the first control unit 110 and a collector of a transistor, respectively. Therefore, when the 5V voltage input of the circuit protection unit 150 is applied to the ADC port of the first controller 110, the measured value of the ADC port of the first controller 110 may become High. If the measured value of the ADC port is High, the first control unit 110 determines that the ground connection with the second device 200 is normal, operates I/O (Input Output), and operates the transistor connected to the I/O port. Current can be applied to the base. Accordingly, the collector/emitter current of the transistor is output, and the circuit protection unit 150 and the ground can be connected. Accordingly, the ground sensing port of the first communication unit 130 connected to the circuit protection unit 150 can also be connected to the ground, so that the second device 200 can share a physical ground with the first device 100. . Although the above-described configuration is difficult to detect when the ground connection is disconnected during operation, there is an advantage that the first communication unit 130 and the second communication unit 230 can be connected in a three-wire manner.

The above-described ground connection of the circuit protection unit 150, the ground connection determination configuration with the second device 200, and the signal transmission configuration according to whether or not the ground is grounded are examples for explanation, and may be varied according to the user or designer's choice. can be configured. Therefore, various components may be included in addition to the above-described components such as the transistor, light emitting diode, photodiode, etc. to determine the ground connection with the second device 200 and to transmit a protection signal depending on whether or not the device is grounded.

In this way, malfunction prevention circuits and devices according to various embodiments can prevent malfunctions due to noise, thereby enabling stable operation and providing reliable products.

In addition, the present invention can strengthen circuit and device protection by periodically checking the ground connection state.

In the above, the technical spirit of the present invention has been described in detail with preferred embodiments, but the technical spirit of the present invention is not limited to the above embodiments, and those skilled in the art within the scope of the technical spirit of the present invention Various modifications and changes are possible by the person.

100: first device
110: first control unit
130: first communication unit
150: circuit protection unit
200: second device
210: second control unit
230: second communication unit

Claims (10)

a communication unit including at least one communication port for communication with another device and at least one ground port for ground (GND) connection with the other device;
a circuit protection unit that connects the ground port and ground (GND) and outputs an operating signal depending on whether or not the other device is grounded; and
Including a control unit that operates according to the operation signal transmitted from the circuit protection unit,
The communication department,
It is connected to the circuit protection unit and includes a ground sensing port for detecting whether or not a ground connection with the other device and a physical ground port for connecting the ground port of the other device and the ground,
The circuit protection unit,
It is connected to the ground sensing port and includes a light emitting diode that emits light depending on whether or not the other device is connected to a ground, and is connected to the control unit and the ground, respectively, and when light emitted from the light emitting diode is not received, the control unit Transmitting a first signal to the control unit to protect the control device, and transmitting a second signal to the control unit so that the control unit operates normally when light emitted from the light emitting diode is received,
controller.
According to claim 1,
the communication department
a plurality of communication ports for communication with the other device;
The plurality of communication ports are
A transmission port for data transmission;
Including a receive port for receiving data
controller.
According to claim 1,
the circuit protection
Transmitting a first signal to the control unit so that the control unit protects the control device when the other device is not connected to the ground.
controller.
delete delete delete delete delete delete According to claim 1,
the circuit protection
One side is connected to the ground sensing port and the other side is connected to the ground,
When a ground port of the other device is connected through the ground sensing port, transmitting a third signal to the control unit so that the ground is connected to the other device through the ground sensing port.
controller.

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