CN111142472A - Control circuit and control method for rapid and stable heating of hot knife - Google Patents
Control circuit and control method for rapid and stable heating of hot knife Download PDFInfo
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- CN111142472A CN111142472A CN202010051949.XA CN202010051949A CN111142472A CN 111142472 A CN111142472 A CN 111142472A CN 202010051949 A CN202010051949 A CN 202010051949A CN 111142472 A CN111142472 A CN 111142472A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
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Abstract
The invention discloses a control circuit and a control method for rapid and stable heating of a hot knife, which comprises a temperature controller, a power regulator and a transformer, wherein a secondary coil of the transformer is connected with a cutter for thermally cutting rubber, and a primary coil of the transformer is connected with a load output end of the power regulator; the temperature sensing signal input end of the temperature controller is connected with a thermocouple for monitoring the heating temperature of the cutter in real time, and the control output end of the temperature controller is connected with the analog quantity input end of the power regulator; the switch signal output end of the temperature controller controls a power supply relay connected with the power regulator; the temperature controller dynamically controls the power regulator according to the analog signal generated by PID calculation according to the temperature of the cutting knife detected by the thermocouple and the temperature value set by the temperature controller in real time, so that the power supply power output by the power regulator is reduced by the voltage of the transformer to increase the current so as to heat the cutting knife; when the temperature of the cutter exceeds the preset temperature, the cutter is powered off to realize the overheat protection function of the cutter; when the cutter is used, the cutter is heated, so that the service life of the cutter is prolonged; the cutter is fast in temperature rise and fall and high in efficiency.
Description
Technical Field
The invention belongs to the field of heating control of a cutter for cutting rubber materials in the tire manufacturing industry, and particularly relates to a control circuit and a control method for quickly and stably heating a hot cutter.
Background
In cutting rubber materials in the tire manufacturing industry, a hot knife (heated cutter) is widely used because of its rapidness and economical efficiency, and the heat of a heating pipe is generally used to heat the cutter body. The heating of the heating pipe enables the cutter to reach the cutting set temperature slowly, so that the heating pipe needs to be continuously heated to bake the cutter under the condition that the equipment is started, the temperature of the cutter is increased, and the service life of the cutter is greatly shortened in the process of long-time continuous heating; if the temperature of the cutter is too high, the power switch of the heating pipe is frequently turned off manually, which wastes time and labor and is very inconvenient to operate; moreover, the heating time required when the heating pipe is just started is longer, so that the cutter can be heated to the required working temperature; when the equipment needs to be maintained, the time for waiting for the cooling of the cutting knife is longer because the residual heat of the heating pipe (the cooling of the heating pipe is slow), so that the mode of indirectly heating the cutting knife by heating the heating pipe is adopted, and the improvement on the production efficiency of the tire manufacturing is not favorable.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a control circuit and a control method for quickly and stably heating a hot knife, and aims to construct the control circuit for electrically heating the cut-off knife and realize a method for quickly heating the cut-off knife to a preset heating temperature and stabilizing the cut-off knife at the preset heating temperature based on the control circuit, so that the cut-off knife can be immediately heated only by using the electrothermal effect of small voltage and large current, and the reduction of the service life of the cut-off knife caused by long-term heating of a cut-off rubber material is avoided.
In order to achieve the first purpose, the present invention provides a control circuit for fast and stable heating of a hot knife, which is characterized in that the control circuit comprises: the device comprises a temperature controller, a power regulator and a transformer, wherein a secondary coil of the transformer is connected with a cutter for thermally cutting rubber, and a primary coil of the transformer is connected with a load output end of the power regulator; the temperature sensing signal input end of the temperature controller is connected with a thermocouple for monitoring the heating temperature of the cutter in real time, and the control output end of the temperature controller is connected with the analog quantity input end of the power regulator; the switch signal output end of the temperature controller controls a power supply relay connected with the power regulator; the temperature controller dynamically controls the power regulator according to the analog signal generated by PID calculation according to the temperature of the cutting knife detected by the thermocouple and the temperature value set by the temperature controller in real time, so that the power supply power output by the power regulator is reduced by the voltage of the transformer to increase the current to heat the cutting knife.
The control circuit also comprises a leakage protection switch for controlling the on-off of the alternating current 220V voltage, the output end of the leakage protection switch is connected with the power supply connecting end of the temperature controller, and the output end of the leakage protection switch is connected with the power supply connecting end of the power regulator through the power supply relay; when the temperature of the cutting knife exceeds the temperature value set by the temperature controller, the switch signal output end sends a signal to control the power supply relay to switch off the power supply of the power regulator. Once the cut-off knife is overheated and exceeds the preset heating temperature, the temperature controller controls and cuts off the power supply of the power regulator, so that the cut-off knife is powered off and rapidly cooled to protect the production safety of the cutting equipment.
A connecting terminal 1 in the temperature controller is a power supply end L phase of the temperature controller, a connecting terminal 2 is a power supply end N phase of the temperature controller, a connecting terminal 5 and a connecting terminal 7 are connecting ends of switching signal output ends, a connecting terminal 11 and a connecting terminal 13 are power regulator control output ends, and a connecting terminal 18 and a connecting terminal 19 are detection signal input ends connected with a thermocouple; the power regulator is characterized in that an electrical interface end 5 in the power regulator is an L phase connected with the output end of the power supply relay, an electrical interface end 6 is an N phase connected with the output end of the power supply relay, an electrical interface end 4 and an electrical interface end-2T 1 are connected with two ends of a primary coil of the transformer in series and connected with the L phase output end of the power supply relay, an electrical interface end 1L1 is connected with the N phase output end of the power supply relay, an electrical interface end 2 is connected with a wiring terminal 13 in the temperature controller, and an electrical interface end 3 is connected with a wiring terminal 11 in the temperature controller; and the L at the output end of the leakage protection switch is connected with a wiring terminal 1 in the temperature controller and an input L phase of the power supply relay, and the N at the output end of the leakage protection switch is connected with a wiring terminal 2 in the temperature controller and an input N phase of the power supply relay. Therefore, the temperature controller, the power regulator, the transformer, the cut-off knife, the thermocouple, the leakage protection switch, the power supply relay and the switch signal output end are connected in detail to form the control circuit.
The temperature controller is also provided with a wiring terminal 3 and a wiring terminal 4, and the wiring terminal 3 and the wiring terminal 4 are connected with a PLC system; the connecting terminal 3 and the connecting terminal 4 feed back the temperature signal of the cutting knife monitored by the temperature controller to the PLC system, so that a production operator can visually monitor the heating temperature condition of the cutting knife through the PLC system.
The resistance value of the cut-off knife is 0.1-0.5 ohm. The cutting knife is made of metal or alloy material, and can be regarded as a pure resistor R with small resistance according to a formula of thermal efficiency P-I2R, I output by the transformer is large enough to quickly heat the cut-off knife, and when the electric cutting knife is actually installed, the resistance of the part of the lead outside the cut-off knife must be small enough to reduce the line consumption of electric energy on the lead.
In order to achieve the second objective of the present invention, the present invention provides a control method for fast and stable heating of a hot knife, comprising a control circuit formed by connecting a temperature controller, a power regulator, a transformer, a cutter used for hot cutting rubber as an output load of the transformer, and a thermocouple, wherein the control method comprises the following steps:
the method comprises the following steps: the alternating current 220V voltage is loaded to a primary coil of the transformer through the power regulator to regulate the power of the transformer, so that the voltage of the cutter connected to a secondary coil is reduced, the current is increased, the heat effect of the large current heats the cutter, and the temperature of the cutter is rapidly increased;
step two: the temperature controller detects the temperature of the cutting knife in real time through a thermocouple, the detected temperature of the cutting knife and a preset heating temperature are subjected to PID calculation by the temperature controller to generate an analog signal, and the temperature controller sends the analog signal to the power regulator in real time to enable the power regulator to dynamically regulate electric power loaded on the cutting knife by the transformer, so that the temperature of the cutting knife is quickly stabilized to a preset heating temperature value;
step three: when the heating temperature of the cut-off knife exceeds the preset heating temperature value, the temperature controller outputs a signal for controlling the relay, the power supply relay switch of the power regulator and the transformer is switched off, the heating of the cut-off knife is stopped, and the cut-off knife can be cooled quickly.
The temperature controller in the method is also externally connected with a PLC system, so that the temperature controller can feed back the monitored temperature signal of the cutting knife to the PLC system.
The power supply end of the power regulator in the method is provided with a power supply relay for switching on and off 220V alternating current voltage, and the on and off of the power supply relay is controlled by a relay switch signal output by a temperature controller; once the temperature that the cut-off knife heated surpasss preset temperature value, the relay switching signal direct control power supply relay disconnection main power supply of temperature controller output makes power regulator and transformer and cut-off knife cut off the power supply simultaneously to realize the overheat protection function of cut-off knife.
The invention has the beneficial effects that:
① the cutter is rapidly electrically heated by the power regulator regulating transformer with low voltage and large current, and the output power of the power regulator is regulated in real time by the temperature controller to stabilize the heating temperature of the cutter, so that the heating speed of the cutter is high;
② when the temperature of the cutter exceeds the preset temperature, the temperature controller controls the power regulator, the transformer and the cutter to be powered off simultaneously, so as to realize the overheat protection function of the cutter;
③ the invention can start heating only when the cutter is to be used, which improves the service life of the cutter, and the cutter can heat up and cool down quickly, reduces the waiting time and improves the efficiency.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
FIG. 2 is a circuit diagram of a cutter driven and heated according to the present invention.
The figures in the drawings are identified as: 10. a temperature controller; 20. a power regulator; 30. a transformer; 40. a cutter; 50. an analog signal; 60. a thermocouple; a PLC system; 100. a leakage protection switch; 200. a power supply relay; 300. and a switching signal output terminal.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The control circuit for quickly and stably heating a hot knife as shown in fig. 1 and fig. 2 comprises a temperature controller 10, a power regulator 20, a transformer 30, and an earth leakage protection switch 100 for controlling the on-off of an alternating current 220V voltage, wherein the output end of the earth leakage protection switch 100 is connected with the power connection end of the temperature controller 10, and the output end of the earth leakage protection switch 100 is connected with the power connection end of the power regulator 20 through the power supply relay 200; the secondary coil of the transformer 30 is connected with a cutter 40 for thermally cutting rubber, the resistance value of the cutter 40 is 0.1-0.5 ohm, and the primary coil of the transformer 30 is connected with the load output end of the power regulator 20; the temperature sensing signal input end of the temperature controller 10 is connected with a thermocouple 60 for monitoring the heating temperature of the cutter 40 in real time, and the control output end of the temperature controller 10 is connected with the analog quantity input end of the power regulator 20; the switch signal output end 300 of the temperature controller 10 controls the power supply relay 200 connected with the power regulator 20; the temperature controller 10 dynamically controls the power regulator 20 according to the analog signal 50 generated by PID calculation according to the temperature of the cutter 40 detected by the thermocouple 60 and the temperature value set by the temperature controller 10 in real time, so that the power supply power output by the power regulator 20 is reduced by the voltage of the transformer 30 to increase the current to heat the cutter 40, and the temperature of the cutter 40 is rapidly increased to the preset heating temperature; when the temperature of the cutting knife 40 exceeds the set temperature value of the temperature controller 10, the switch signal output end 300 sends a signal to control the power supply relay 200 to cut off the power supply of the power regulator 20, so that the cutting knife 40 is rapidly cooled.
Referring to fig. 1 and 2, describing the specific circuit connection structure of the present invention in detail, a connection terminal 1 in a temperature controller 10 of the present invention is a power supply terminal L phase of the temperature controller 10, a connection terminal 2 is a power supply terminal N phase of the temperature controller 10, a connection terminal 5 and a connection terminal 7 are connection terminals of a switching signal output terminal 300, a connection terminal 11 and a connection terminal 13 are control output terminals of a power regulator 20, and a connection terminal 18 and a connection terminal 19 are detection signal input terminals connected with a thermocouple 60; the L of the output end of the leakage protection switch 100 is connected with a wiring terminal 1 in the temperature controller 10 and an input L phase of the power supply relay 200, and the N of the output end of the leakage protection switch 100 is connected with a wiring terminal 2 in the temperature controller 10 and an input N phase of the power supply relay 200; the power regulator 20 of the invention has an electrical interface terminal 5 of L phase connected with the output terminal of the power supply relay 200, an electrical interface terminal 6 of N phase connected with the output terminal of the power supply relay 200, an electrical interface terminal 4 and an electrical interface terminal-2T 1 which are connected in series with the two ends of the primary coil of the transformer 30 and connected with the L phase output terminal of the power supply relay 200, an electrical interface terminal 1L1 connected with the N phase output terminal of the power supply relay 200, an electrical interface terminal 2 connected with a connecting terminal 13 in the temperature controller 10, and an electrical interface terminal 3 connected with a connecting terminal 11 in the temperature controller 10; the temperature controller 10 is further provided with a wiring terminal 3 and a wiring terminal 4, the wiring terminal 3 and the wiring terminal 4 are connected with a PLC system 70, and the wiring terminal 3 and the wiring terminal 4 can feed back a temperature signal of the cutting knife 40 monitored by the temperature controller 10 to the PLC system 70.
As shown in fig. 2, when a rubber material needs to be cut, the leakage protection switch 100 is turned on, the voltage of the AC220V directly supplies power to the temperature controller 10 through the connection terminal 1 and the connection terminal 2 of the temperature controller 10, the voltage of the AC220V supplies power to the electrical interface terminals 4 to 6, the electrical interface terminal 1L1 and the electrical interface terminal-2T 1 through the power supply relay 200, the power is supplied to the power converter 20 and the transformer 30, so that two ends connected in series to the secondary coil of the transformer 30 generate low-voltage large current to pass through the cut-off knife 40, and the cut-off knife 40 is rapidly heated by the electrothermal effect; the temperature of the cutting knife 40 is detected by a thermocouple 60 in real time and is transmitted and input to a connecting terminal 18 and a connecting terminal 19 of a temperature controller 10, the temperature controller 10 generates an analog signal 50 by PID calculation of the temperature of the cutting knife 40 obtained in real time and a preset temperature, the analog signal 50 is controlled and output to an electrical interface end 2 and an electrical interface end 3 of a power regulator 20 through a connecting terminal 13 and a connecting terminal 14, the analog signal 50 dynamically controls the electrical interface end 4 and the electrical interface end-2T 1 of the power regulator 20, the power of a primary coil of a transformer 30 is increased, a large current output by the transformer 30 is regulated to rapidly heat the cutting knife 40, and the cutting knife 40 is rapidly heated to the preset heating temperature; the cutter 40 has short heating time and high temperature, so that the temperature of the cutter 40 can reach the working temperature for cutting the rubber material quickly. Once the temperature of the cutting knife 40 detected by the thermocouple 60 exceeds the set temperature, the temperature controller 10 controls the power supply relay 200 to be switched off through the switching signal output ends 300 of the electrical interface end 6 and the electrical interface end 7, so that the power regulator 20 and the transformer 30 are powered off together, the cutting knife 40 is immediately stopped heating when being powered off, and the temperature is rapidly reduced, so that the cutting knife 40 is protected from overheating, and the service life of the cutting knife 40 is prevented from being shortened.
The control principle of the heating cutter 40 of the present invention is explained in detail as follows.
As shown in fig. 1 and fig. 2, a method for controlling the rapid and stable heating of a hot knife comprises a control circuit formed by connecting a temperature controller 10, a power regulator 20, a transformer 30, a cutter 40 used for thermally cutting rubber as an output load of the transformer 30, and a thermocouple 60, and the method comprises the following steps:
the method comprises the following steps: the alternating current 220V voltage is loaded to the primary coil of the transformer 30 through the power regulator 20 to regulate the power of the transformer 30, so that the voltage of the cut-off knife 40 connected to the secondary coil is reduced and the current is increased, the heat effect of the large current heats the cut-off knife 40, and the temperature of the cut-off knife 40 is rapidly increased;
step two: the temperature controller 10 detects the temperature of the cutter 40 in real time through the thermocouple 60, the detected temperature of the cutter 40 and the preset heating temperature are calculated by PID through the temperature controller 10 to generate an analog signal 50, the temperature controller 10 sends the analog signal 50 to the power adjuster 20 in real time, so that the power adjuster 20 dynamically adjusts the electric power loaded on the cutter 40 by the transformer 30, and the temperature of the cutter 40 is quickly stabilized to the preset heating temperature value; the temperature controller 10 can feed back the monitored temperature signal of the cut-off knife 40 to the external PLC system 70 in real time so as to monitor the temperature of the cut-off knife 40;
step three: when the heating temperature of the cutting knife 40 exceeds the preset heating temperature value, the temperature controller 10 outputs a signal for controlling the relay through the switch signal output terminal 300, and disconnects the power supply relay 200 of the power regulator 20 and the transformer 30, and stops the electrical heating of the cutting knife 40, so that the cutting knife 40 can be rapidly cooled.
When the electric heating cutter is used, the cutter 40 is heated, the temperature rising speed is high, the phenomenon that the electric heating time of the cutter 40 is too long is avoided, and the service life of the cutter 40 is prolonged. And after cutting, the power supply of the cutter 40 is cut off, so that the cutter 40 is rapidly cooled. Through the control of the control circuit, the temperature rising and reducing speed of the cut-off knife 40 is high, the waiting time is reduced, the use efficiency of the cut-off knife 40 can be improved, and the service life of the cut-off knife 40 can be prolonged.
The above embodiments are provided only for illustrating the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (8)
1. A control circuit for rapid and stable heating of a hot knife is characterized by comprising: the device comprises a temperature controller (10), a power regulator (20) and a transformer (30), wherein a secondary coil of the transformer (30) is connected with a cutter (40) for thermally cutting rubber, and a primary coil of the transformer (30) is connected with a load output end of the power regulator (20); the temperature sensing signal input end of the temperature controller (10) is connected with a thermocouple (60) for monitoring the heating temperature of the cutter (40) in real time, and the control output end of the temperature controller (10) is connected with the analog quantity input end of the power regulator (20); a switch signal output end (300) of the temperature controller (10) controls a power supply relay (200) connected with the power regulator (20); the temperature controller (10) dynamically controls the power regulator (20) according to an analog signal (50) generated by PID calculation according to the temperature of the cutter (40) detected by the thermocouple (60) and the temperature value set by the temperature controller (10) in real time, so that the power supply power output by the power regulator (20) is reduced by the transformer (30) to increase the current so as to heat the cutter (40).
2. The control circuit for rapid and stable heating of a hot knife according to claim 1, wherein: the power supply device also comprises a leakage protection switch (100) for controlling the on-off of the alternating current 220V voltage, the output end of the leakage protection switch (100) is connected with the power supply connecting end of the temperature controller (10), and the output end of the leakage protection switch (100) is connected with the power supply connecting end of the power regulator (20) through the power supply relay (200); when the temperature of the cut-off knife (40) exceeds the temperature value set by the temperature controller (10), the switch signal output end (300) sends a signal to control the power supply relay (200) to cut off the power supply of the power regulator (20).
3. The control circuit for rapid and stable heating of a hot knife according to claim 2, wherein:
a connecting terminal 1 in the temperature controller (10) is a power supply end L phase of the temperature controller (10), a connecting terminal 2 is a power supply end N phase of the temperature controller (10), a connecting terminal 5 and a connecting terminal 7 are connecting ends of a switching signal output end (300), a connecting terminal 11 and a connecting terminal 13 are control output ends of a power regulator (20), and a connecting terminal 18 and a connecting terminal 19 are detection signal input ends connected with a thermocouple (60);
an electrical interface end 5 in the power regulator (20) is an L phase connected with the output end of the power supply relay (200), an electrical interface end 6 is an N phase connected with the output end of the power supply relay (200), an electrical interface end 4 and an electrical interface end-2T 1 are connected with two ends of a primary coil of the transformer (30) in series and connected with the L phase output end of the power supply relay (200), an electrical interface end 1L1 is connected with the N phase output end of the power supply relay (200), an electrical interface end 2 is connected with a wiring terminal 13 in the temperature controller (10), and an electrical interface end 3 is connected with a wiring terminal 11 in the temperature controller (10);
and the L at the output end of the leakage protection switch (100) is connected with a wiring terminal 1 in the temperature controller (10) and an input L phase of the power supply relay (200), and the N at the output end of the leakage protection switch (100) is connected with a wiring terminal 2 in the temperature controller (10) and an input N phase of the power supply relay (200).
4. The control circuit for rapid and stable heating of a hot knife according to claim 2, wherein: the temperature controller (10) is also provided with a wiring terminal 3 and a wiring terminal 4, and the wiring terminal 3 and the wiring terminal 4 are connected with a PLC system (70); the connecting terminal 3 and the connecting terminal 4 feed back a temperature signal of the cut-off knife (40) monitored by the temperature controller (10) to the PLC system (70).
5. The control circuit for rapid and stable heating of a hot knife according to any one of claims 1 to 4, wherein: the resistance value of the cut-off knife (40) is 0.1-0.5 ohm.
6. A control method for fast and stable heating of a hot knife comprises a control circuit formed by connecting a temperature controller (10), a power regulator (20), a transformer (30), a cutter (40) used for hot cutting rubber as an output load of the transformer (30) and a thermocouple (60), and the control method comprises the following steps:
the method comprises the following steps: the alternating current 220V voltage is loaded to a primary coil of a transformer (30) through a power regulator (20) to regulate the power of the transformer (30), so that the voltage of a cutter (40) connected to a secondary coil is reduced, the current is increased, the heat effect of the large current heats the cutter (40), and the temperature of the cutter (40) is rapidly increased;
step two: the temperature controller (10) detects the temperature of the cut-off knife (40) in real time through a thermocouple (60), the detected temperature of the cut-off knife (40) and a preset heating temperature are calculated through PID by the temperature controller (10) to generate an analog signal (50), the temperature controller (10) sends the analog signal (50) to the power regulator (20) in real time, the power regulator (20) dynamically regulates electric power loaded on the cut-off knife (40) by a transformer (30), and the temperature of the cut-off knife (40) is quickly stabilized to the preset heating temperature value;
step three: when the heating temperature of the cut-off knife (40) exceeds the preset heating temperature value, the temperature controller (10) outputs a signal for controlling the relay, the power supply relay switch of the power regulator (20) and the transformer (30) is switched off, the heating of the cut-off knife (40) is stopped, and the cut-off knife (40) can be rapidly cooled.
7. The method for controlling rapid and stable heating of a hot knife according to claim 6, wherein: the temperature controller (10) is also externally connected with a PLC system (70) so that the temperature controller (10) can feed back the monitored temperature signal of the cut-off knife (40) to the PLC system (70).
8. The method for controlling rapid and stable heating of a hot knife according to claim 6, wherein: the power supply end of the power regulator (20) is provided with a power supply relay (200) for switching on and off 220V alternating current voltage, and the on and off of the power supply relay (200) is controlled by a relay switch signal output by the temperature controller (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010051949.XA CN111142472A (en) | 2020-01-17 | 2020-01-17 | Control circuit and control method for rapid and stable heating of hot knife |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010051949.XA CN111142472A (en) | 2020-01-17 | 2020-01-17 | Control circuit and control method for rapid and stable heating of hot knife |
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| CN111142472A true CN111142472A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010051949.XA Pending CN111142472A (en) | 2020-01-17 | 2020-01-17 | Control circuit and control method for rapid and stable heating of hot knife |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203817593U (en) * | 2014-05-13 | 2014-09-10 | 国家电网公司 | Safe and energy-saving electric welding machine control circuit system |
| CN204486902U (en) * | 2015-01-07 | 2015-07-22 | 鼎汉科技(厦门)有限公司 | A kind of double material electrical heating cutting knife device |
| CN207741341U (en) * | 2017-11-28 | 2018-08-17 | 西安市永鑫科技有限公司 | It is a kind of can automatic temperature-control heating boiler |
| CN208414221U (en) * | 2018-06-27 | 2019-01-22 | 深圳市汉唐福发展有限公司 | A kind of 3D glass heat bender and its temperature control system |
| US20190030544A1 (en) * | 2017-07-25 | 2019-01-31 | BioHiTech America, LLC | Systems and methods of intelligently controlling equipment such as food waste machines |
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2020
- 2020-01-17 CN CN202010051949.XA patent/CN111142472A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203817593U (en) * | 2014-05-13 | 2014-09-10 | 国家电网公司 | Safe and energy-saving electric welding machine control circuit system |
| CN204486902U (en) * | 2015-01-07 | 2015-07-22 | 鼎汉科技(厦门)有限公司 | A kind of double material electrical heating cutting knife device |
| US20190030544A1 (en) * | 2017-07-25 | 2019-01-31 | BioHiTech America, LLC | Systems and methods of intelligently controlling equipment such as food waste machines |
| CN207741341U (en) * | 2017-11-28 | 2018-08-17 | 西安市永鑫科技有限公司 | It is a kind of can automatic temperature-control heating boiler |
| CN208414221U (en) * | 2018-06-27 | 2019-01-22 | 深圳市汉唐福发展有限公司 | A kind of 3D glass heat bender and its temperature control system |
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Application publication date: 20200512 |
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| RJ01 | Rejection of invention patent application after publication |