CN201364010Y

CN201364010Y - Dry heating-preventing controller for micro-heat regenerated absorption dryer

Info

Publication number: CN201364010Y
Application number: CNU2008201782735U
Authority: CN
Inventors: 冯天行
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-10
Filing date: 2008-11-10
Publication date: 2009-12-16
Anticipated expiration: 2018-11-10

Abstract

The utility model relates to a dry heating-preventing controller for a micro-heat regenerated absorption dryer, which can effectively prevent the constant dry heating of an external heater so that the whole dyer cannot be damaged therefore. A display chip and a push button in a test display screen are connected with a control chip of the controller through data wires, and an upper computer is connected with the control chip through a communication chip. The utility model has the following advantages: (1) the dry heating phenomenon is prevented, so that the safety of the equipment is protected; (2) the precision of temperature detection is increased, the debugging step is simplified, the production cost is reduced, and the equipment can be remotely and conveniently controlled and monitored.

Description

Anti-dry low-grade fever regeneration absorption type drier controller

Technical field

The utility model relates to a kind ofly can effectively prevent the dry combustion method always of external heater, causes the anti-dry low-grade fever regeneration absorption type drier controller that whole drying machine damages, and belongs to drier controller and makes the field.

Background technology

At present, drier controller one is because of faulty sensor or gas circuit difference, causes the dry combustion method always of external heater, causes the damage of whole drying machine; The 2nd, thermophilic degree accuracy of detection is not high, debugging trouble, production cost height; The 3rd, can not carry out remote monitoring.

Summary of the invention

The purpose of this utility model provides a kind of anti-dry low-grade fever regeneration absorption type drier controller.

Design: in order to realize above-mentioned purpose of design.1, the indicating section of text display is connected with controller by the SPI serial communication mode, and host computer is one of feature of the utility model design by the design that the RS485 serial communication mode is connected with controller.The purpose of doing like this is: the one, adopt the RS485 communication interface, and realize long-range control and monitoring by upper computer software; The 2nd, simple in structure, easy to use.2, the design of the two-way temperature sensor of controller, be the utility model design feature two.The purpose of doing like this is: high by 2 tunnel stability, the minimum sensor of deviation detects heter temperature and air outlet temperature respectively, and opening/stop by air outlet temperature of heater controlled, in heat time heating time, be lower than lower limit as air outlet temperature, heater starting, be higher than higher limit, heater cuts out.When surpassing higher limit or sensor, heter temperature detects data when not normal, stop heater work, work all the time and cause the situation of the too high damage equipment of heter temperature thereby avoided because of gas circuit valve closing gas circuit obstructed or air outlet temperature sensor to damage heater.3, data signal through light-coupled isolation control output, the design of the output of reporting to the police, be the utility model design feature three.The purpose of doing like this is: more stable work, efficiency of transmission height.4, the temperature sensor analog signals converts the design that data signal sends control chip to by delta sigma type A/D converter, be the utility model design feature four.The purpose of doing like this is: the one, analog signal directly is converted to data signal without amplifying, and make signal more stable, improved certainty of measurement and stability greatly, simplified debugging step, improved cost performance of product; The 2nd, Various types of data, alarm signal are uploaded to host computer by the RS185 communication interface, and all kinds of operational orders of host computer also send to the MCU central processing unit chip of control panel by the RS485 communication interface.5, the design that links to each other with host computer by the RS485 communication interface of control chip is five of the feature that designs of the utility model.The purpose of doing like this is: can realize long-range control and monitoring by upper computer software.

Technical scheme: anti-dry low-grade fever regeneration absorption type drier controller, the display chip in the text display screen, button are connected with the control chip of controller by data wire, and host computer is connected with control chip by communication chip.

The utility model is compared with background technology, and the one, prevented the appearance of dry combustion method phenomenon, protected the safety of equipment; The 2nd, improved temperature detecting precision, simplify debugging step and reduced production cost, the 3rd, be convenient to apparatus remote control and monitoring.

Description of drawings

Fig. 1 is an anti-dry low-grade fever regeneration absorption type drier controller theory diagram.

The specific embodiment

Embodiment 1: with reference to accompanying drawing 1.Anti-dry low-grade fever regeneration absorption type drier controller, the output of the power supply termination power module 2-1 of text display screen 1.Display chip 1-1 in the text display screen 1 is provided with charactron 1-3 and indicator lamp 1-4; Display chip 1-1 in the text display screen 1, button 1-2 are connected with the control chip 2-4 of controller 2 by data wire, and host computer 3 is connected with control chip 2-4 by communication chip 2-5.Controller 2 is made of power module 2-1, delta sigma A/D converter 2-2, A/D converter 2-3, input signal interface 2-4, communication chip 2-5, light-coupled isolation 2-7 and 2-8, power module 2-1 is connected with control chip 2-5 power end, delta sigma A/D converter 2-2, A/D converter 2-3, communication chip 2-6 are connected with control chip 2-4 signaling interface respectively, and light-coupled isolation 2-7 is connected with the signal output interface of 2-8 signal input interface with control chip 2-5; The input termination alternating current of power module 2-1, input termination thermocouple or the RTD of delta sigma A/D converter 2-2, A/D converter 2-3 input termination 4-20mA analog signals.That is to say, to have the anti-dry function, adopt delta sigma type A/D converter collecting temperature, have host computer telecommunication and control function by the control system that text display and controller are formed.Controller 2 is split-type structural with text display 1, the two-way temperature sensor is with heter temperature, air outlet temperature analog signal and 4～20mA analog signals access controller 2, convert data signal to by delta sigma type A/D converter 2-2 and A/D converter 2-3 and be sent to control chip 2-4, control, alarm signal are exported through light-coupled isolation, and control chip 2-4 links to each other with host computer 3 by the RS485 communication interface.Two-way temperature signal control chip 2-4 handles, and judges heater work according to setting value.When heter temperature was too high, heater cut out automatically, and output alarm signal.Control chip 2-4 is connected with host computer 3 through the RS485 communication interface by communication chip 2-6, makes to realize Long-distance Control and monitoring.

What need understand is: though the foregoing description is to the utility model detailed text description of contrasting; but these text descriptions; just the simple text of the utility model mentality of designing is described; rather than to the restriction of utility model mentality of designing; any combination, increase or modification that does not exceed the utility model mentality of designing all falls in the protection domain of the present utility model.

Claims

1, a kind of anti-dry low-grade fever regeneration absorption type drier controller, it is characterized in that: the display chip in the text display screen, button are connected with the control chip of controller by data wire, and host computer is connected with control chip by communication chip.

2, anti-dry low-grade fever regeneration absorption type drier controller according to claim 1, it is characterized in that: controller is made of power module, delta sigma A/D converter, A/D converter, input signal interface, communication chip, light-coupled isolation, power module is connected with the control chip power end, delta sigma A/D converter, A/D converter, communication chip are connected with the control chip signaling interface respectively, and the light-coupled isolation signal input interface is connected with the signal output interface of control chip.

3, anti-dry low-grade fever regeneration absorption type drier controller according to claim 2, it is characterized in that: the input termination alternating current of power module, the input termination thermocouple or the RTD of delta sigma A/D converter, A/D converter input termination 4-20mA analog signals.

4, anti-dry low-grade fever regeneration absorption type drier controller according to claim 1 is characterized in that: the output of the power supply termination power module of text display screen.

5, anti-dry low-grade fever regeneration absorption type drier controller according to claim 1, it is characterized in that: display chip is provided with charactron and indicator lamp.