TWI836796B - Monitoring module for solid state relay and furnace device having the same - Google Patents

Abstract

A monitoring module for a solid state relay (SSR) arranged between a controller and a load is provided. The monitoring module includes a SSR temperature monitoring unit, an alarm output unit and a processing unit. The SSR temperature monitoring unit includes a first sensor, a second sensor, and a third sensor. The first sensor and the second sensor are respectively disposed on two output ends of the solid state relay and are used to detect the temperature of the output ends. The third sensor is disposed on a radiating plate of the solid state relay or a switch circuit (TRIAC), and the third sensor is used to detect the temperature of the solid state relay. The alarm output unit is used to send out an overheating warning signal. The processing unit is electrically connected to the SSR temperature monitoring unit and the alarm output unit. The processing unit is used to determine an overheating condition in the solid state relay and the output ends according to the received temperature detection result. When the overheating condition in the solid state relay and the output ends is confirmed, the alarm output unit will send out an overheat warning signal and cut off the control signal to the solid state relay.

Description

Monitoring module of solid state relay and heating furnace device with monitoring module

The present invention relates to a monitoring module, in particular to a monitoring module of a solid state relay and a heating furnace device having the monitoring module.

Solid State Relay (SSR) has the characteristics of no spark, no noise, fast switching speed, etc. Unlike traditional electromagnetic relays, which are easily damaged during fast ON/OFF cycles, it has gradually replaced traditional electromagnetic relays. Solid-state relays have input and output ends, which are isolated by optical isolation elements. After the signal is input from the input end, the output end changes from open circuit (broken circuit) to short circuit (passed) state, thereby conducting high-power output current. However, sometimes it will fail due to excessive load current or high temperature, causing the output end of the solid-state relay to remain short-circuited or open-circuited, and cannot be turned off or turned on.

The applicant once proposed a "monitoring module of a solid-state relay and a heating furnace with the monitoring module" (TW I632581). The solid-state relay is located between the controller and the load. The monitoring module includes an input signal detection The unit, an output current detection unit, an alarm output unit, and the processing unit can detect the control signal input by the controller to the input terminal of the solid-state relay through the input signal detection unit, and generate a signal detection result accordingly, and The output current detection unit detects the current at the output end of the solid-state relay, and generates a current detection result accordingly, so that the processing unit can instantly determine the fault of the solid-state relay based on the received signal detection result and current detection result, and can Immediate notification of solid state relay failure.

Although the monitoring module of the solid-state relay can monitor the state of the solid-state relay in real time and make a judgment, the existing solid-state relay is prone to overheating due to poor heat dissipation, and the output end (high power end) of the solid-state relay is prone to poor contact due to poor wiring or oxidation after long-term use, resulting in heat when conducting, thereby causing burns or combustion.

The technical problem to be solved by the present invention is to provide a monitoring module for a solid-state relay and a heating furnace device with the monitoring module in view of the shortcomings of the existing technology, which can monitor the overheating situation of the solid-state relay in real time. If the solid-state relay and the output end are overheated, When the alarm is activated, an alarm can be sounded to prevent overheating from causing burns or even fires, which can greatly increase safety.

In order to solve the above technical problems, the present invention provides a monitoring module of a solid-state relay. The solid-state relay is located between a controller and a load. The solid-state relay has an input terminal and an output terminal. A circuit board is provided inside the solid-state relay. , the circuit board is provided with at least one electronic heating element, the solid state relay has a heat sink, the heat sink contacts the electronic heating element, the monitoring module includes: a solid state relay temperature detection unit, including at least a first detection unit , a second detector and a third detector. The first detector and the second detector are respectively provided or connected to two output terminals of the solid state relay for detecting the solid state relay. The output temperature of the solid-state relay, the third detector is set or connected to the heat sink, circuit board or electronic heating element of the solid-state relay to detect the temperature of the solid-state relay. The first detector, the second detector The device and the third detector detect the temperature and generate a temperature detection result accordingly; a warning output unit is used to send an overheat warning signal; and a processing unit is electrically connected to the solid-state relay temperature detection unit and The warning output unit; the processing unit is used to determine whether the solid-state relay and the output terminal are overheated based on the received temperature detection result, and when it is determined that the solid-state relay or the output terminal is overheated, control the warning output unit The overheating warning signal is issued.

Preferably, the monitoring module is connected between the controller and the input terminal of the solid-state relay, and the input control signal of the solid-state relay is sent by the monitoring module.

In order to solve the above technical problems, the present invention also provides a heating furnace device with a monitoring module. The heating furnace device has a heater, a power source for supplying power to the heater, and a power source for sensing the A temperature sensor of the heater temperature, a solid state relay connected to the heater and the power source, a monitoring module for real-time monitoring of the solid state relay, and a connection to the temperature sensor, the solid state relay and The temperature controller of the monitoring module is used to receive the temperature signal sent by the temperature sensor and send a control signal to the solid-state relay according to the temperature signal to control the on-off of the solid-state relay so that the power source can The heater supplies power or stops power supply; the solid-state relay has an input terminal and an output terminal; a circuit board is provided inside the solid-state relay; at least one electronic heating element is provided on the circuit board; the solid-state relay has a heat dissipation plate, and the heat dissipation plate contacts The electronic heating element, the monitoring module includes: a solid-state relay temperature detection unit, including at least a first detector, a second detector and a third detector, the first detector and the The second detector is disposed or connected to two output terminals of the solid state relay for detecting the temperature of the output terminal of the solid state relay. The third detector is disposed or connected to the heat sink and circuit board of the solid state relay. Or an electronic heating element used to detect the temperature of the solid-state relay, the first detector, the second detector and the third detector detect the temperature and generate a temperature detection result accordingly; an alarm output A unit is used to send an overheat warning signal; and a processing unit is electrically connected to the solid-state relay temperature detection unit and the warning output unit; the processing unit is used to determine the solid-state relay, the Whether the output terminal is overheated, and when it is determined that the solid state relay and the output terminal are overheated, the warning output unit is controlled to send the overheating warning signal.

The beneficial effect of the present invention is that the monitoring module of the solid-state relay and the heating furnace device having the monitoring module provided by the present invention can detect the temperature of the output end of the solid-state relay through the first detector and the second detector of the solid-state relay temperature detection unit, and detect the temperature of the solid-state relay through the third detector of the solid-state relay temperature detection unit. The first detector, the second detector and the third detector detect the temperature and generate a temperature detection result accordingly, so that the processing unit can judge whether the solid-state relay and the output end are overheated in real time according to the received temperature detection result, and can immediately notify when the solid-state relay and the output end are overheated.

Furthermore, the monitoring module is connected between the controller and the input terminal of the solid-state relay. Since the input control signal of the solid-state relay is sent by the monitoring module, as long as there is any alarm, the control signal of the solid-state relay can be cut off immediately. Make it inactive and the protection is more complete.

To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not used to limit the present invention.

100: Solid-state relay

101:Input terminal

102: Output terminal

1021: Output contact

1022: Output contact

103:Output terminal

104:Circuit board

105: Electronic heating element

106: Heat sink

107:Connecting line

200: Controller

300:Load

400:Power source

500: Temperature sensor

1: Monitoring module

10: Input signal detection unit

20: Output current detection unit

30: Warning output unit

40: Processing unit

50:Signal isolation unit

60: Output voltage detection unit

70: Communication unit

80:Power supply unit

90:Solid state relay temperature detection unit

T1: First detector

T2: Second detector

T3: The third detector

M:Heating furnace

V1: control signal

I: current

V2: voltage

S: warning signal

Figure 1 is a block diagram (1) of the monitoring module of the solid-state relay of the present invention.

Figure 2 is a block diagram of the monitoring module of the present invention (I).

Figure 3 is a block diagram of the monitoring module of the present invention (II).

Figure 4 is a block diagram (2) of the monitoring module of the solid-state relay of the present invention.

Figure 5 is a block diagram (3) of the monitoring module of the present invention.

Figure 6 is a schematic diagram of the heating furnace device of the present invention.

Figure 7 is a schematic diagram of the solid state relay of the present invention.

The following are specific examples to illustrate the relevant implementation modes disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. fruit. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of the present invention. In addition, the term "or" used in this article shall include any one or combination of more of the associated listed items depending on the actual situation.

[Implementation example]

Please refer to Figures 1 and 2. The present invention provides a monitoring module for a solid-state relay. The solid-state relay 100 of this embodiment is disposed between a controller 200 and a load 300, and the solid-state relay 100 has an input terminal 101 and an output terminal. 102. The input terminal 101 and the output terminal 102 are used to connect the monitoring module 1 and the load 300 respectively. Preferably, the monitoring module 1 is connected between the controller 200 and the input terminal 101 of the solid-state relay 100, because the input terminal of the solid-state relay 100 The control signal is sent by the monitoring module 1, so as long as there is any alarm, the control signal of the solid state relay 100 can be cut off immediately to make it inactive and the protection is more complete.

In practical applications, the output terminal 102 can have two normally open output contacts 1021 and 1022 connected to the power source 400 and the load 300 respectively. At this time, the output state of the output terminal 102 is open circuit. When there is an input signal, the output state can be A conversion occurs. For example, the controller 200 can be a temperature controller, and the load 300 can be a heater, but is not limited thereto. The controller 200 is used to send a control signal to the monitoring module 1 and the input terminal 101 of the solid-state relay 100, and when the control signal is true (for example, when the signal is between 3Vdc and 32Vdc, it is true), the output terminal 102 of the solid-state relay 100 That is, short circuit (conduction), and when the control signal is false (for example, when the signal is less than 3Vdc, it is false), the output terminal 102 of the solid state relay 100 is open circuit, and the output terminal 102 of the solid state relay 100 is controlled accordingly. (The large power terminal) is short-circuited or open-circuited, causing the power source 400 to supply power to the load 300 or to stop supplying power. In order to prevent the solid-state relay 100 from overheating and malfunctioning, the monitoring module 1 of this embodiment is used to monitor the solid-state relay 100 in real time.

As shown in FIG2 , the monitoring module 1 includes a solid-state relay temperature detection unit 90, an alarm output unit 30 and a processing unit 40. Preferably, the monitoring module 1 may also include an input signal detection unit 10 and an output current detection unit 20. In practical applications, the processing unit 40 may be a micro-controller with a built-in preset program, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) and other control chips or hardware circuit components to perform corresponding control on each functional unit.

In this embodiment, the input signal detection unit 10 is electrically connected to the control signal V1 of the controller 200, and generates a signal detection result accordingly, which is electrically connected to the processing unit 40, and then the processing unit 40 is connected to the input terminal 101 of the solid-state relay 100 to input the control signal.

In this embodiment, the output current detection unit 20 is electrically connected to the processing unit 40 and the output terminal 102 of the solid state relay 100 , and the output current detection unit 20 is used to detect the current I of the output terminal 102 of the solid state relay 100 , and correspondingly generate a current detection result. In practical applications, the output current detection unit 20 may be, for example, a current-transformer, a current-shunt, a Hall effect current sensor, a current detector, or a current detection circuit. Or a corresponding circuit to detect the load current flowing through the load 300 and convert the load current into a current detection result.

The solid-state relay temperature detection unit 90 at least includes a first detector T1, a second detector T2, and a third detector T3. The first detector T1 and the second detector T2 are respectively disposed at two locations of the output terminal 102 of the solid-state relay 100 to detect the temperature of the output terminal 102 of the solid-state relay 100. The first detector T1 and the second detector T2 can be respectively disposed at two output locations of the output terminal 102 of the solid-state relay 100. Terminal 103 (as shown in FIG. 7 ), the output terminal 103 is a high power terminal, the first detector T1 and the second detector T2 can also be appropriately connected to other positions of the output terminal 102 of the solid-state relay 100, for example, they can be connected to the connection line 107 of the output terminal 102 of the solid-state relay 100, so as to use the first detector T1 and the second detector T2 to detect the temperature of the output terminal 102 of the solid-state relay 100.

The third detector T3 is provided on the heat sink plate or switching circuit of the solid state relay 100 itself. (TRIAC) and other components to detect the temperature of the solid-state relay 100. Specifically, the solid-state relay 100 is equipped with a circuit board 104 (as shown in Figure 7). The circuit board 104 is a circuit unit. The circuit board The electronic heating element 105 such as a switching circuit (TRIAC) can be provided on the solid state relay 104, and the solid state relay 100 has a heat sink 106. The heat sink 106 contacts the electronic heating element 105 to assist the solid state relay 100 in dissipating heat. The third detector T3 The heat dissipation plate 106, the circuit board 104 or the electronic heating element 105 of the solid state relay 100 can be provided or connected to detect the temperature of the solid state relay 100 using the third detector T3. The first detector T1, the second detector T2 and the third detector T3 can all be installed at predetermined positions in a built-in or external manner.

The solid-state relay temperature detection unit 90 is electrically connected to the processing unit 40 , and the solid-state relay temperature detection unit 90 is used to detect the output end 102 of the solid-state relay 100 and the temperature of the solid-state relay 100 . In practical applications, the first detector T1 , the second detector T2 and the third detector T3 of the solid-state relay temperature detection unit 90 may be thermocouples, thermistors, resistance temperature detectors (RTD) or Semiconductor temperature sensors, etc., are not restricted.

The warning output unit 30 is electrically connected to the processing unit 40, and the warning output unit 30 is used to output a warning signal S. In practical applications, the warning output unit 30 can be a relay, open-drain/open-collector output, voltage output, current output or photo-coupler output, etc.

The processing unit 40 is used to receive the temperature detection result, and judge the overheating of the solid-state relay 100 according to the temperature detection result, and when the solid-state relay 100 is judged to be overheated, the warning output unit 30 is controlled to send out a warning signal S (overheating warning signal). In this embodiment, when the first detector T1, the second detector T2 and the third detector T3 detect a temperature reaching 100°C, it is judged to be overheated, and the warning output unit 30 is immediately controlled to send out a warning signal S (overheating warning signal).

The processing unit 40 is used to receive the signal detection result and the current detection result, and determine the fault of the solid-state relay 100 based on the signal detection result and the current detection result, and when determining the solid-state relay 100 When the status relay 100 fails, the warning output unit 30 is controlled to send out a warning signal S (fault warning signal).

Please refer to FIG. 3 and FIG. 1. In one embodiment, the monitoring module 1 may further include a signal isolation unit 50. The signal isolation unit 50 is electrically connected to the processing unit 40 and the output current detection unit 20, and the signal isolation unit 50 is used to isolate the current or voltage of the output terminal 102 (high power terminal) of the solid-state relay 100, that is, the signal isolation unit 50 can provide isolation between the output terminal 102 (high power terminal) of the solid-state relay 100 and other units to avoid damage to other units. If the output current detection unit 20 is a sensor with an isolation function (such as a current transformer), the signal isolation unit 50 can be omitted.

Please refer to Figures 4 and 5. In one embodiment, the monitoring module 1 may also include an output voltage detection unit 60. The output voltage detection unit 60 detects the presence or absence of the voltage of the power source 400 connected to the output terminal 102 of the solid-state relay 100. By including the output voltage detection unit 60, the monitoring module 1 can make a more detailed judgment.

In one embodiment, the output current detection unit 20 and the output voltage detection unit 60 of the monitoring module 1 can use current/voltage detection elements with higher accuracy, and by improving the computing power of the processing unit 40, the monitoring module 1 can also be used as a current/voltage/power measurement and recording module, and has a wider range of applications.

In one embodiment, the load 300 is a heater, which will have aging problems after being used for a period of time, causing its resistance value to change, which will lead to changes in current and output power. The monitoring module 1 will detect and issue a warning. , can be used as a warning or reference for replacement of load 300 performance degradation.

The monitoring module 1 may also include a communication unit 70 (as shown in FIG. 5 ). The communication unit 70 is electrically connected to the processing unit 40 and is used for communication to send out an overheating or fault warning message. In practical applications, the communication unit 70 may use a communication method such as RS-232/485/422 communication, Ethernet communication or wireless communication, and the operating parameters of the monitoring module 1 may be set through the communication unit 70, such as the number of the monitoring module 1, the conditions for sending out overheating or fault warning messages, etc. In addition, the communication unit 70 may have a communication isolation function to avoid interference.

In addition, the monitoring module 1 may also include a power supply unit 80 (as shown in FIG. 5 ). The power supply unit 80 is electrically connected to the processing unit 40 and is used to provide the power required for the monitoring module 1 to operate. In practical applications, power can be provided directly by a communication line or by an independent power supply.

Please refer to FIG. 6 and FIG. 1 . In one embodiment, the monitoring module 1 can be installed on a heating furnace (heating furnace device) M, and the heating furnace M can be a box-type heating furnace. The heating furnace M of this embodiment can be provided with a solid-state relay 100, a controller 200, a load 300, a power source 400, and a temperature sensor 500. In this embodiment, the controller 200 is a temperature controller, the load 300 is a heater, the power source 400 is used to supply power to the heater (load 300), the temperature sensor 500 is used to sense the temperature of the heater (load 300), the solid-state relay 100 is connected to the heater (load 300) and the power source 400, the monitoring module 1 is used to monitor the solid-state relay 100 in real time, and the temperature controller (controller 200) is used to receive the temperature signal sent by the temperature sensor 500 and send a control signal to the solid-state relay 100 according to the temperature signal, so that the power source 400 supplies power to the heater (load 300) or stops supplying power.

[Beneficial effects of the embodiment]

The beneficial effect of the present invention is that the solid-state relay monitoring module and the heating furnace device with the monitoring module provided by the present invention can be used through the first detector and the second detector of the solid-state relay temperature detection unit. Detect the temperature of the output end of the solid-state relay, and detect the temperature of the solid-state relay through the third detector of the solid-state relay temperature detection unit. The first detector, the second detector and the third detector detect the temperature, And correspondingly generates a temperature detection result, so that the processing unit can instantly determine whether the solid-state relay and the output terminal are overheated based on the received temperature detection result, and can immediately report when the solid-state relay and the output terminal are overheated.

Furthermore, the monitoring module is connected between the controller and the input terminal of the solid-state relay. Since the input control signal of the solid-state relay is sent by the monitoring module, as long as there is any alarm, the control signal of the solid-state relay can be cut off immediately. Make it inactive and the protection is more complete.

The contents disclosed above are only preferred and feasible embodiments of the present invention, and are not intended to limit the scope of the invention. The patentable scope of the present invention is limited, so all equivalent technical changes made by using the description and drawings of the present invention are included in the patentable scope of the present invention.

100:Solid state relay

101:Input terminal

102:Output terminal

1021: Output contact

1022: Output contact

200: Controller

300:Load

400:Power source

500: Temperature sensor

1: Monitoring module

T1: First detector

T2: Second detector

T3: The third detector

V1: control signal

I: Current

S: warning signal

Claims (10)

A monitoring module for a solid-state relay. A solid-state relay is provided between a controller and a load. The solid-state relay has an input end and an output end. A circuit board is provided inside the solid-state relay. At least one electronic heater is provided on the circuit board. component, the solid-state relay has a heat sink, the heat sink contacts the electronic heating component, and a monitoring module includes: a solid-state relay temperature detection unit, including at least a first detector, a second detector and a A third detector. The first detector and the second detector are respectively arranged or connected to two output terminals of the solid state relay for detecting the temperature of the output terminal of the solid state relay. The third detector The device is arranged or connected to the heat sink, circuit board or electronic heating element of the solid state relay to detect the temperature of the solid state relay. The first detector, the second detector and the third detector detect temperature, and correspondingly generates a temperature detection result; a warning output unit is used to send an overheat warning signal; and a processing unit is electrically connected to the solid-state relay temperature detection unit and the warning output unit; the processing unit is used to It is determined whether the solid state relay and the output terminal are overheated according to the received temperature detection result, and when it is determined that the solid state relay and the output terminal are overheated, the warning output unit is controlled to issue the overheating warning signal. A monitoring module for a solid-state relay as described in claim 1, wherein the monitoring module is connected between the controller and the input terminal of the solid-state relay, and the solid-state relay input control signal is issued by the monitoring module. The solid-state relay monitoring module as claimed in claim 1, wherein the first detector and the second detector are respectively provided or connected to two output terminals of the output end of the solid-state relay. The monitoring module of the solid-state relay as described in claim 1, wherein the first detector and the second detector are respectively arranged or connected to two connection lines at the output end of the solid-state relay. The monitoring module of the solid-state relay as described in claim 1, wherein the monitoring module further includes an input-end signal detection unit and an output-end current detection unit, the input-end signal detection unit is electrically connected to the control signal of the controller, and generates a signal detection result in response, which is electrically connected to the processing unit, and then the processing unit is connected to the input-end input control signal of the solid-state relay, and the output-end current detection unit is electrically connected to the solid-state relay. The output end of the relay is used to detect the current of the output end of the solid-state relay and generate a current detection result accordingly. The processing unit is electrically connected to the input end signal detection unit and the output end current detection unit; the processing unit is used to determine the fault of the solid-state relay according to the received signal detection result and the current detection result, and when the solid-state relay is determined to be faulty, the warning output unit is controlled to send a fault warning signal. A heating furnace device with a monitoring module. A heating furnace device has a heater, a power source for supplying power to the heater, a temperature sensor for sensing the temperature of the heater, and a connection. A solid-state relay in the heater and the power source, a monitoring module for real-time monitoring of the solid-state relay, and a temperature controller connected to the temperature sensor, the solid-state relay and the monitoring module, the temperature The controller is used to receive the temperature signal from the temperature sensor and send a control signal to the solid-state relay according to the temperature signal to control the on-off of the solid-state relay so that the power source supplies or stops power to the heater; the solid-state relay It has an input end and an output end. A circuit board is provided inside the solid-state relay. At least one electronic heating element is provided on the circuit board. The solid-state relay has a heat sink that contacts the electronic heating element. The monitoring module includes: A solid-state relay temperature detection unit includes at least a first detector, a second detector and a third detector. The first detector and the second detector are respectively arranged or connected to the There are two output terminals of the solid state relay for detecting The output temperature of the solid state relay, the third detector is set or connected to the heat sink, circuit board or electronic heating element of the solid state relay to detect the temperature of the solid state relay, the first detector, the third detector The two detectors and the third detector detect the temperature and generate a temperature detection result accordingly; a warning output unit is used to send an overheat warning signal; and a processing unit is electrically connected to the solid-state relay temperature detection The detection unit and the warning output unit; the processing unit is used to determine whether the solid-state relay and the output terminal are overheated based on the received temperature detection result, and when it is determined that the solid-state relay and the output terminal are overheated, control the warning output unit Issue this overheating warning signal. The heating furnace device as described in claim 6, wherein the monitoring module is connected between the temperature controller and the input end of the solid-state relay, and the solid-state relay input control signal is issued by the monitoring module. The heating furnace device of claim 6, wherein the first detector and the second detector are respectively provided or connected to two output terminals of the output end of the solid state relay. The heating furnace device of claim 6, wherein the first detector and the second detector are respectively disposed or connected to two connecting lines of the output end of the solid-state relay. The heating furnace device according to claim 6, wherein the monitoring module further includes an input signal detection unit and an output current detection unit, and the input signal detection unit is electrically connected to the control unit of the temperature controller. signal, and correspondingly generates a signal detection result, which is electrically connected to the processing unit, and then the processing unit is connected to the input end of the solid-state relay to input a control signal, and the output-end current detection unit is electrically connected to the solid-state relay. The output terminal is used to detect the current at the output terminal of the solid state relay and generate a current detection result accordingly. The processing unit is electrically connected to the input terminal signal detection unit and the output terminal current detection unit. element; the processing unit is used to determine the fault of the solid-state relay based on the received signal detection result and the current detection result, and when it is determined that the solid-state relay is faulty, control the warning output unit to send out a fault warning signal.

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