A kind of air-heater control system and control methodTechnical field
The invention belongs to Fan Equipment technical field, and in particular to a kind of air-heater control system and control method.
Background technology
Air-heater is a kind of widely used drying equipment, existing air-heater drying equipment includes the heater and air blower being connected with power supply, during work, switch on power, air blower is blow air into heater, make cold air out of helical form heating wire, outside uniformly through, after heater is powered, heating wire produces heat, with carrying out heat exchange by the cold air on heating wire periphery, produce hot-air, raise the wind-warm syndrome of air outlet, the temperature sensor being connected by relay with heater is provided with the air outlet of air-heater, when the temperature of air outlet reaches sensor preset value, signal is passed to relay by temperature sensor, disconnect relay, stop heating, it is more single to there is control function in this air-heater, it is unable to intelligentized control method, be not suitable for using some places for having special drying process requirement, the problem of remote control and control air output can not be realized during control temperature.
The content of the invention
The present invention provides a kind of air-heater control system and control method, it is therefore intended that the deficiencies in the prior art are made up there is provided the air-heater control system and control method of a kind of intelligentized control method, to be applicable the place of special drying process.
To achieve the above object, the invention provides a kind of air-heater control system, including air-heater, controller for controlling the air-heater work, temperature sensor for detecting the hot blast built-in temperature, the control end of the air-heater is electrically connected with the controller, the air-heater includes electric heater, blower fan, wind conveying pipe road, the blower fan is driven by blower motor, and it is arranged on the air inlet in the wind conveying pipe road, the electric heater is arranged in the wind conveying pipe road and close to its air outlet, the temperature sensor is arranged on the air outlet in the wind conveying pipe road；
The controller includes data processing unit, frequency converter, counting unit, comparing unit, input block, the data processing unit is connected with external power source, the frequency converter, counting unit, comparing unit, input block, the temperature sensor signal output end are electrically connected with the data processing unit, and the blower motor signal input part is electrically connected with the frequency converter.
Further, the input block includes power switching module, heating shutdown switch module, heating starting switch module, fan switch module, function setting module, timing module, display module.
Further, the controller also includes communication interface modules, and the communication interface modules is electrically connected with the data processing unit, and the input block also includes mode switch module, and the mode switch module is electrically connected with the data processing unit.
Further, the controller also includes alarm module, and the alarm module is electrically connected with the data processing unit, and the alarm module includes overtemperature alarm, temperature anomaly, phase sequence exception, the alarm signal indicator lamp of blower fan overload.
Further, the controller includes the air flow sensor for being used to detect the fan delivery, and the air flow sensor is arranged at the air inlet in the wind conveying pipe road, and the air flow sensor signal output part is electrically connected with the frequency converter.
Further, the temperature sensor is K-type thermocouple.
Present invention also offers a kind of air-heater control method, using a kind of air-heater control system described above, following steps are specifically included：
Power switch is pressed, the controller is powered；
Fan switch key is pressed, the blower motor switches on power, drive the blower fan operating；
Press heating starting on ＆ off switch, the electric heater switches on power heating, simultaneously, the timing module starts timing, the data processing unit is by real time temperature value signal is included on the display module in electric heater described in the K-type thermocouple induction, and the temperature value signal is passed into the frequency converter, the frequency converter is according to the temperature value signal compared with default rated temperature, and whether control electric heater works；The air flow sensor senses the air quantity value signal of the blower fan and the air quantity value signal is passed into the frequency converter, and the frequency converter controls blower motor running speed according to air quantity value signal.
Present invention has the advantages that：By using this new air-heater control system of the present invention, by setting controller to be connected with air-heater, data processing unit is provided with controller, frequency converter, counting unit, comparing unit, input block, the electric heater of air-heater is connected by temperature sensor with data processing unit, blower motor is connected by frequency converter with data processing unit, input block can set different functional switches according to difference in functionality, counting unit, comparing unit, input block is connected with each other by data processing unit, so as to realize intelligentized control method according to process requirements, can be with automatic switching in the case of realizing no one's operation；Air flow sensor connects frequency converter, and the air volume signal that frequency converter can be transmitted according to air flow sensor adjusts blower motor rotating speed, controls the air force of air outlet, saved the energy in good time；It is connected on the controller provided with communication interface modules with external communication device, binding pattern switch module, can be achieved to carry out switching on and shutting down operation to control system by remote equipment；Alarm module and display module are provided with the controller, energy fast and easy finds out failure cause when breaking down, and improves operating efficiency, realize safe efficient, easy to use, energy-conservation.
Brief description of the drawings
Fig. 1 is a kind of air-heater control system circuit schematic diagram provided in an embodiment of the present invention；
Fig. 2 is the circuit theory diagrams of controller in the embodiment of the present invention；
In figure, 1- controllers, 11- data processing units, 12- frequency converters, 13- counting units, 14- comparing units, 15- alarm modules, 16- input blocks, 161- power switching modules, 162- heats shutdown switch module, 163- heating starting switch modules, 164- fan switch modules, 165- function setting modules, 166- timing modules, 167- display modules, 2- blower fans, 3- electric heaters.
Embodiment
To make the object, technical solutions and advantages of the present invention of greater clarity, with reference to embodiment and referring to the drawings, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit the scope of the present invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring idea of the invention.
Embodiment
The embodiments of the invention provide a kind of air-heater control system, such as Fig. 1, shown in Fig. 2, the invention provides a kind of air-heater control system, including air-heater, controller 1 for controlling the air-heater work, temperature sensor for detecting the hot blast built-in temperature, the control end of the air-heater is electrically connected with the controller 1, the air-heater includes electric heater 3, blower fan 2, wind conveying pipe road, the blower fan is driven by blower motor, and it is arranged on the air inlet in the wind conveying pipe road, the electric heater 3 is arranged in the wind conveying pipe road and close to its air outlet, the temperature sensor is arranged on the air outlet in the wind conveying pipe road, wherein, the temperature sensor is K-type thermocouple.
Controller 1 includes data processing unit 11, frequency converter 12, counting unit 13, comparing unit 14, alarm module 15, input block 16, the data processing unit 11 is connected with external power source, frequency converter 12, counting unit 13, comparing unit 14, alarm module 15, input block 16, the temperature sensor signal output end is electrically connected with the data processing unit 11, the blower motor signal input part is electrically connected with the frequency converter 12, wherein, input block 16 includes power switching module 161, heat shutdown switch module 162, heating starting switch module 163, fan switch module 164, function setting module 165, timing module 166, display module 167；Alarm module 15 includes overtemperature alarm, temperature anomaly, phase sequence exception, the alarm signal indicator lamp of blower fan overload.
Controller 1 also includes a communication interface modules and the air flow sensor for detecting the fan delivery, the communication interface modules is electrically connected with the data processing unit 11, the air flow sensor is arranged at the air inlet in the wind conveying pipe road, and the air flow sensor signal output part is electrically connected with the frequency converter 12；Input block 16 also includes mode switch module, and the mode switch module is electrically connected with data processing unit 11.
Present invention also offers a kind of air-heater control method, using a kind of air-heater control system described above, following steps are specifically included：
Power switch is pressed, controller 1 is powered；
Fan switch key is pressed, the blower motor switches on power, drive the blower fan operating；
Press heating starting on ＆ off switch, the electric heater 3 switches on power heating, simultaneously, the timing module 166 starts timing, the data processing unit 11 is by real time temperature value signal is included on the display module 167 in electric heater described in the K-type thermocouple induction, and the temperature value signal is passed into frequency converter 12, frequency converter 12 is according to the temperature value signal compared with default rated temperature, and whether control electric heater 3 works；The air flow sensor senses the air quantity value signal of the blower fan 2 and the air quantity value signal is passed into frequency converter 12, and frequency converter 12 controls blower motor running speed according to air quantity value signal.
It should be appreciated that the above-mentioned embodiment of the present invention is used only for exemplary illustration or explains the principle of the present invention, without being construed as limiting the invention.Therefore, any modification, equivalent substitution and improvements done without departing from the spirit and scope of the present invention etc., should be included in the scope of the protection.In addition, the whole that appended claims of the present invention are intended to fall into scope and border or this scope and the equivalents on border changes and modifications example.