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CN-122028243-A - Circuit board of electric ignition heating furnace and testing equipment thereof

CN122028243ACN 122028243 ACN122028243 ACN 122028243ACN-122028243-A

Abstract

The embodiment of the invention provides an electric fire heating furnace circuit board and test equipment thereof, which comprise a circuit structure and an electric heating furnace, wherein the circuit structure is used for controlling the electric heating furnace and comprises a substrate and a direct-insert MOS tube, a grid G, a source S and a drain D are arranged on the direct-insert MOS tube, the grid G, the source S and the drain D are led out to the substrate to serve as test contacts, and the circuit structure further comprises an MOS tube monitoring module and judges the driving circuit state and the actual on or off state of the direct-insert MOS tube according to the grid source voltage and the drain source voltage. Relates to the field of electric heating control. Through setting up MOS pipe monitoring module, detect the gate source voltage and the drain source voltage of straight-insert type MOS pipe for the circuit board can acquire the key electric state information of MOS pipe in the course of working, thereby provide reliable foundation for judging the actual operating condition of MOS pipe.

Inventors

  • LIU ZUFA

Assignees

  • 深圳市华焰天下科技有限公司

Dates

Publication Date
20260512
Application Date
20260310

Claims (10)

  1. 1. The circuit board of the electric heating furnace is characterized by comprising a circuit structure (3) and an electric heating furnace, wherein the circuit structure (3) is used for controlling the electric heating furnace; the circuit structure (3) comprises a substrate (31) and an in-line MOS tube (38), wherein a grid G (3121), a source S (3122) and a drain D (3123) are arranged on the in-line MOS tube (38), and the grid G (3121), the source S (3122) and the drain D (3123) are led out to the substrate (31) to serve as test contacts; The circuit structure (3) further comprises an MOS tube monitoring module, wherein the MOS tube monitoring module is used for detecting gate-source voltage and drain-source voltage of the direct-insert MOS tube (38) and judging the driving circuit state and the actual on or off state of the direct-insert MOS tube (38) according to the gate-source voltage and the drain-source voltage.
  2. 2. The electric fire heating furnace circuit board according to claim 1, further comprising an MCU master control (36), wherein the MOS transistor monitoring module determines whether the driving circuit is normal by detecting the gate-source voltage.
  3. 3. The electric fire heating furnace circuit board according to claim 1, wherein the MOS transistor monitoring module determines an actual on state of the in-line MOS transistor (38) by detecting a drain-source voltage.
  4. 4. The electric fire heating furnace circuit board of claim 1, wherein the MOS transistor monitoring module detects the drain-source voltage during a MOS transistor turn-off.
  5. 5. The electric fire heating furnace circuit board according to claim 1, further comprising a power sampling module (39), wherein the circuit structure (3) comprises a voltage sampling sub-module, the voltage sampling sub-module is integrated in the power sampling module (39), and the power sampling module (39) is used for collecting the gate-source voltage and the drain-source voltage in real time.
  6. 6. The electric fire heating furnace circuit board according to claim 2, wherein the circuit structure (3) comprises a fan control module (32), a transformer circuit transformer sampling module (34), a transformer load connection end (33), a transformer module (35) and a heat sink (310), wherein the heat sink (310) is arranged on the in-line MOS tube (38); The fan control module (32) is used for controlling a cooling fan in the electric heating furnace, and the cooling fan is used for cooling an arc generation area.
  7. 7. The electric fire heating furnace circuit board according to claim 6, wherein the fan control module (32) supports PWM speed regulation control, and the MCU master control (36) dynamically regulates the rotation speed of the cooling fan according to the abnormal degree of the drain-source voltage, the arc power sampling value or the furnace body temperature signal detected by the MOS transistor monitoring module.
  8. 8. The electric fire heating furnace circuit board according to claim 7, characterized in that the circuit structure (3) further comprises an alarm output unit, the alarm output unit is connected to the MCU main control (36), when the MOS transistor monitoring module detects abnormal gate-source voltage or drain-source voltage, the MOS transistor monitoring module supplies power through the 12V auxiliary power supply unit (37) and sends out fault information.
  9. 9. A test device for an electric fire heating furnace circuit board, characterized in that the device is applied to the electric fire heating furnace circuit board according to any one of claims 1 to 8, and comprises a pressing structure (2), a shell (1), a positioning mechanism (4) and three monitoring ends (52); The pressing structure (2) is arranged on the shell (1), the positioning mechanism (4) is used for positioning the circuit structure (3), three monitoring ends (52) are arranged inside the shell (1), and the three monitoring ends (52) respectively correspond to the grid electrode G (3121), the source electrode S (3122) and the drain electrode D (3123); the positioning mechanism (4) comprises a plate body (41), a bottom plate (42), a supporting block (43), a sliding rod (44) and a first spring (45); the utility model discloses a light-emitting diode display panel, including base plate (31), support plate (42), support plate (41), slide bar (44), support piece (43) sliding connection, support piece (43) with casing (1) is connected, first spring (45) cover is established on slide bar (44) just the both ends of first spring (45) respectively with slide bar (44) with support piece (43) are connected, the constant head tank has been seted up to the inboard of plate (41) with base plate (42) are connected, base plate (42) are used for supporting base plate (31), the constant head tank with the shape of base plate (31) matches, plate (41) with slide bar (44) are connected, slide bar (44) with support piece (43).
  10. 10. The test equipment for the circuit board of the electric fire heating furnace according to claim 9, wherein the pressing structure (2) comprises a sliding sleeve (21), a limiting rod (22), a pressing plate (23), a side plate (24), a rotating handle (25), a connecting rod (26) and a pressing rod (27); The sliding sleeve (21) is in sliding connection with the limiting rod (22), the sliding sleeve (21) is connected with the pressing plate (23), the pressing plate (23) is attached to the radiating fin (310), the pressing plate (23) is connected with the pressing rod (27), the pressing rod (27) is in sliding connection with the side plate (24), the side plate (24) is connected to the shell (1), the upper part of the pressing rod (27) is in rotating connection with the connecting rod (26), the connecting rod (26) is in rotating connection with the rotating handle (25), and the rotating handle (25) is in rotating connection with the side plate (24); when the connecting rod (26) is parallel to the axial direction of the pressing rod (27), the pressing plate (23) is at the lowest point, and the pressing plate (23) cannot drive the rotating handle (25) to move.

Description

Circuit board of electric ignition heating furnace and testing equipment thereof Technical Field The invention relates to the field of electric heating control, in particular to an electric ignition heating furnace circuit board and test equipment thereof. Background As a device for realizing heating by an electric arc mode, the electric heating furnace has high heating speed and high heat efficiency and is widely applied to the fields of industrial heating and civil heating. In an electric ignition furnace, a circuit board is generally used for controlling the working state of the furnace, wherein the stability and reliability of a power switch device directly influence the safety and service life of the whole machine. In the existing circuit board of the electric heating furnace, an MOS tube is generally adopted as a power control device, and the MOS tube is controlled to be turned on or off through a driving circuit so as to realize the adjustment of the power of the electric heating furnace. However, most of control modes of the MOS transistor in the prior art are only based on the control signal, and lack effective detection means for the actual working state of the MOS transistor, so that it is difficult to know whether the MOS transistor is in a normal on or off state in time. In addition, in the product delivery detection stage, the existing circuit board often cannot independently and intuitively test the grid electrode, the source electrode and the drain electrode of the MOS tube, so that the problem of abnormal driving part or abnormal device performance is exposed after delivery, and the consistency and the reliability of the product are affected. Therefore, how to detect the key electrical parameters of the MOS transistor without significantly increasing the complexity of the circuit, and determine the driving circuit state and the actual on or off state of the MOS transistor according to the detection result is a technical problem that needs to be solved by those skilled in the art. Disclosure of Invention According to an embodiment of the invention, an electric ignition heating furnace circuit board and test equipment thereof are provided. Is used for solving the technical problems in the background art. In a first aspect of the invention, an electric fire heating furnace circuit board is provided. The circuit board of the electric ignition heating furnace comprises a circuit structure and an electric heating furnace, wherein the circuit structure is used for controlling the electric heating furnace; The circuit structure comprises a substrate and an in-line MOS tube, wherein a grid G, a source S and a drain D are arranged on the in-line MOS tube, and the grid G, the source S and the drain D are led out to the substrate to serve as test contacts; the circuit structure further comprises an MOS tube monitoring module, wherein the MOS tube monitoring module is used for detecting gate-source voltage and drain-source voltage of the direct-insert MOS tube and judging the driving circuit state and the actual on-off state of the direct-insert MOS tube according to the gate-source voltage and the drain-source voltage. Preferably, the MOS tube monitoring module further comprises an MCU main control, and the MOS tube monitoring module judges whether the driving circuit is normal or not by detecting the gate-source voltage. Preferably, the MOS transistor monitoring module determines the actual on state of the in-line MOS transistor by detecting the drain-source voltage. Preferably, the MOS transistor monitoring module detects the drain-source voltage during the turn-off period of the MOS transistor. Preferably, the circuit structure further comprises a power sampling module, the circuit structure comprises a voltage sampling sub-module, the voltage sampling sub-module is integrated with the power sampling module, and the power sampling module is used for collecting the gate-source voltage and the drain-source voltage in real time. Preferably, the circuit structure comprises a fan control module, a transformer load connecting end, a transformer module and a radiating fin, wherein the radiating fin is arranged on the direct-insert MOS tube; the fan control module is used for controlling a cooling fan in the electric heating furnace, and the cooling fan is used for forcedly cooling the arc generation area and related high-temperature components. Preferably, the fan control module supports PWM speed regulation control, and the MCU main control dynamically adjusts the rotation speed of the cooling fan according to the abnormal degree of the drain-source voltage, the arc power sampling value or the furnace body temperature signal detected by the MOS tube monitoring module. Preferably, the circuit structure further comprises an alarm output unit, the alarm output unit is connected to the MCU main control, when the MOS tube monitoring module detects that the gate-source voltage or the drain-source voltage is abn