CN201145860Y

CN201145860Y - Real time intelligent temperature controller

Info

Publication number: CN201145860Y
Application number: CNU2007201297364U
Authority: CN
Inventors: 金慧峰
Original assignee: SUZHOU NEW ASIA TECHNOLOGIES Inc
Current assignee: SUZHOU NEW ASIA TECHNOLOGIES Inc
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2008-11-05
Anticipated expiration: 2017-12-26

Abstract

The utility model relates to a real-time intelligent temperature controller which comprises a microcontroller module, a temperature detection module and a display module; the utility model also comprises a current detection module used for transmitting induced current to the microcontroller module; a real-time clock module used for providing the present time and realizing the real-time control; an input module used for setting work parameters and controlling the displaying output of a display circuit; an output module used for cutting off and recovering the connection of a device and a power and a communication module used for providing a communication interface for the microcontroller module. As the current detection module is arranged, the current overload, open-phase and unbalance of the device can be monitored; when the accidents happen, an output protection circuit can cut off the connection of the device and the power, thus protecting a compressor; the real-time clock module realizes the control for temperature in different time periods, and the arrangement of the communication module realizes the centralized control for the device.

Description

Real time intelligent temperature controller

Technical field

The utility model relates to a kind of intelligent temperature controller that is used for A.T.C in freezing and refrigerating system.

Background technology

Intelligent temperature controller is in large supermarket, industrial freezer, applications such as refrigerator are very extensive, it mainly is that core realizes A.T.C with the single-chip microcomputer, the operation circuit of existing intelligent controller generally includes single-chip microcomputer, power circuit for the single-chip microcomputer power supply, be arranged on the temperature sensor on the relevant device, carry out the display that temperature shows, described single-chip microcomputer is judged according to the temperature of preset temperature range and temperature sensor senses, realization is to temperature auto control, but existing intelligent temperature controller has the following disadvantages: 1, temperature controller only possesses temperature control, lack the unit operation electric current is shown control, if current overload occurs, can not in time find when phase shortage or three-phase imbalance, therefore can't in time discharge fault, the protection unit; 2, temperature controller can't carry out real-time Monitoring and Controlling; 3, the occasion that a plurality of temperature controllers are used can't be carried out centralized control.

Summary of the invention

The utility model purpose be provide in order to overcome the deficiencies in the prior art a kind of can centralized control and can carry out the current detecting intelligent temperature controller in real time.

For achieving the above object, the technical solution adopted in the utility model is: a kind of real time intelligent temperature controller, comprise micro controller module, the temperature detecting module that is used for temperature sensor of being connected with described micro controller module one input end, be used for alternating current be converted to power circuit that direct current is described micro controller module power supply, with the display module that described micro controller module one output terminal is connected, it also comprises:

Current detection module is connected with an input end of described micro controller module, is used for induction current is inputed to micro controller module;

The real time clock module is controlled by described micro controller module and is used to provide the current time and realizes control in real time;

Load module, the demonstration that is used to set running parameter and control display circuit that is connected with an input end of microcontroller is exported;

Output module is connected with an output terminal of described micro controller module, is used to cut off and being connected of restorer and power supply;

Communication module, being electrically connected with described micro controller module is used to described micro controller module that communication interface is provided.

When in use, the temperature of the real-time collecting temperature detection module of micro controller module induction output is also controlled and is shown by charactron the temperature of equipment, simultaneously, micro controller module is also gathered the current value of current detection module induction in real time, running current situation to equipment detects judgement, and show by charactron, when faults such as generation current overload, phase shortage, imbalance, microprocessor module output control signal driving output module cut-out equipment is connected with power supply, and send warning information, thereby effectively protected equipment; And by the real time clock module is set, temperature controller has the function that real time clock shows, can control at times, and it has communication interface simultaneously, makes the temperature controller realization network control that can be connected with computing machine.

Because the utilization of technique scheme; the utility model compared with prior art has following advantage: owing to be provided with current detection module; current overload, phase shortage, imbalance to equipment are monitored; when above-mentioned fault occurring; output protection circuit will cut off being connected of equipment and power supply, thereby protect compressor, and the real time clock module realizes the control at times to temperature; and the setting of communication module has realized the centralized control to equipment.

Description of drawings

Accompanying drawing 1 is the utility model real time intelligent temperature controller electricity theory diagram;

Accompanying drawing 2 is the utility model micro controller module circuit theory diagrams;

Accompanying drawing 3 is the utility model current detection module electrical schematic diagram

Accompanying drawing 4 is the utility model temperature measurement module electrical schematic diagram;

Accompanying drawing 5 is the utility model power circuit electrical schematic diagram;

Accompanying drawing 6 is the utility model output module electrical schematic diagram;

Accompanying drawing 7 is the utility model display circuit electrical schematic diagram;

Accompanying drawing 8 is the utility model load module electrical schematic diagram;

Accompanying drawing 9 is the utility model novel communication module electrical schematic diagram;

Accompanying drawing 10 is the utility model real time clock module electrical schematic diagram;

Wherein: 1, micro controller module; 2, temperature detecting module; 3, power circuit; 4, display module; 5, current transformer; 6, real time clock module; 7, load module; 8, output module; 9, communication module; 10, current detection module;

Embodiment

Below in conjunction with accompanying drawing, describe particular content of the present utility model in detail for example:

Intelligent temperature controller electricity theory diagram as shown in Figure 1, comprise micro controller module 1, what be connected with the input end of this micro controller module 1 has temperature detecting module 2, current detection module 10, real time clock module 6, power circuit 3, a load module 7, what be connected with micro controller module 1 output terminal has display module 4, an output module 8, and carry out the communication module 9 that two-way communication is connected with described micro controller module 1, below earlier each functional module is described below:

Shown in Figure 2 is the electrical schematic diagram of micro controller module 1, and this module core is a single-chip microcomputer, and single-chip microcomputer is built-in with A/D converter, thereby can become digital signal to show by charactron to the analog signal conversion of input.

Fig. 3 is the electrical schematic diagram of current detection module 10, this current detection module 10 comprises current transformer 5, in the present embodiment, current transformer is three mutual inductors, a divider resistance links to each other with each coil, divider resistance be connected to input of single chip, when in use, three phase lines of the three-phase supply of equipment to be controlled are passed respective coil respectively, obtaining voltage signal through divider resistance is input in the single-chip microcomputer, the A/D converter of the single-chip microcomputer inside not voltage signal of isopen converts the corresponding digital current value to, show by display module 4, therefore single-chip microcomputer can be monitored the running current situation of equipment in real time, thereby the normal operation of service equipment, described A/D converter can be selected 9～12 A/D converters, it becomes digital signal with lower sampling resolving power with analog signal conversion with higher sampling rate, utilize over-sampling again, noise shaping and digital filtering technique, improve effective resolution, thereby the temperature measurement accuracy of intelligent temperature controller is provided.

Fig. 4 is the electrical schematic diagram of temperature detecting module 2, this temperature detecting module is in series by temperature sensor (not shown), divider resistance and is linked into the input end of single-chip microcomputer, single-chip microcomputer is gathered the voltage signal of divider resistance, voltage signal converts digital signal to by inner A/D converter, and the temperature value with correspondence after single-chip microcomputer calculates this digital signal shows by display module 4, so the intelligent temperature controller of present embodiment can be monitored the temperature of environment and equipment in real time.

Fig. 5 is the electrical schematic diagram of power circuit 3, this power circuit 3 is used to single-chip microcomputer that direct-current working volts are provided, this circuit is in series successively by transformer, rectifier, filter capacitor, voltage stabilizer, electric main (220V alternating current) converts low-voltage AC to through transformer, through becoming low-voltage DC behind rectifier and the filter capacitor rectifying and wave-filtering, single-chip microcomputer and other functional modules are exported in the further voltage stabilizing of this direct current process voltage stabilizer to low-voltage AC again.

Fig. 6 is the electrical schematic diagram of output module 8, this output module 8 is by chip for driving, relay is in series and forms, the integrated a plurality of transistors of described chip for driving, the collector of each transistor connects a relay, when in use, one of them relay can be connected with power supply, other relays are used to realize blower fan control and defrost control, single-chip microcomputer in carrying out the current detecting process if find overcurrent, during fault such as phase shortage or imbalance, thereby the transistor that the output high level drives in the described chip for driving is controlled each relay work, i.e. disconnection is connected with power supply, and send alarm signal, when electric current recovers normal, relay will be compound automatically under the control of single-chip microcomputer.

Fig. 7 is the circuit theory diagrams of display module, and this display module 4 mainly is made up of charactron, the delivery outlet of the single-chip microcomputer control displaying contents that is connected with each section mouth of charactron.

Fig. 8 is the circuit theory diagrams of load module 7, and it mainly is in series by multichannel button and pull-up resistor and forms, when key is pressed, and output low level; Press when no key, be output as high level, load module 7 selects different buttons to carry out different parameter settings and output shows control, and single-chip microcomputer carries out control corresponding by detecting the high-low level of this load module 7.

Fig. 9 is the circuit theory diagrams of communication module 9, this communication module 9 links to each other with single-chip microcomputer and is used to micro controller module that communication interface is provided, by communication module 9 is set, the temperature controller of present embodiment can be connected with equipment such as computing machines, can realize the network control that man-machine conversation, multimachine link to each other by communication protocol, in the present embodiment, communication module is mainly selected the MAX485 chip for use.

Figure 10 is the circuit theory diagrams of real time clock module 6, and this circuit is made up of clock chip, crystal oscillator, resistance, electric capacity, and single-chip microcomputer is read and write control to clock chip, and controller was controlled according to Beijing time.Simultaneously, the use of electric capacity makes that when controller cuts off the power supply real time clock still can continue operation, guarantees the accuracy of Beijing time.And should can show the time, also can adjust, set clock by the button of display module by charactron.In the present embodiment, clock chip is selected HT1302 for use, and electric capacity is 0.22F, and crystal oscillator adopts 32768Hz.

The concrete course of work is as follows: the temperature of the real-time collecting temperature sensor sensing of single-chip microcomputer is also controlled and is shown by charactron the temperature of equipment, simultaneously, single-chip microcomputer is also gathered the current value of current transformer induction in real time, running current situation to equipment detects judgement, and show by charactron, when faults such as generation current overload, phase shortage, imbalance, single-chip microcomputer output control signal driving output module cut-out equipment is connected with power supply, and send warning information, thereby effectively protected equipment; And by the real time clock module is set, temperature controller has the function that real time clock shows, can control at times, and it has communication interface simultaneously, makes the temperature controller realization network control that can be connected with computing machine.

Claims

1, a kind of real time intelligent temperature controller, comprise micro controller module (1), the temperature detecting module (2) that is used for temperature sensor of being connected with described micro controller module (1) one input end, be used for alternating current be converted to power circuit (3) that direct current is described micro controller module (1) power supply, with the display module (4) that described micro controller module (1) one output terminal is connected, it is characterized in that: it also comprises

Current detection module (10) is connected with an input end of described micro controller module (1), is used for induction current is inputed to micro controller module (1);

Real time clock module (6) is controlled by described micro controller module (1) and is used to provide the current time and realizes control in real time;

Load module (7), the demonstration that is used to set running parameter and control display circuit (4) that is connected with an input end of microcontroller (1) is exported;

Output module (8) is connected with an output terminal of described micro controller module (1), is used to cut off and being connected of restorer and power supply;

Communication module (8), being electrically connected with described micro controller module (1) is used to described micro controller module (1) that communication interface is provided.

2, real time intelligent temperature controller according to claim 1 is characterized in that: described micro controller module (1) is a single-chip microcomputer.

3, real time intelligent temperature controller according to claim 1 and 2, it is characterized in that: described micro controller module (1) is built-in with A/D converter, and described A/D converter is used for temperature detecting module (2) is become digital signal with current detection module (10) input analog signal conversion wherein.

4, real time intelligent temperature controller according to claim 3 is characterized in that: described A/D converter is 8～12 A/D converters.

5, real time intelligent temperature controller according to claim 1 is characterized in that: the divider resistance that described current detection module (10) comprises current transformer (5), is electrically connected with described current transformer (5).

6, real-time intelligent controller according to claim 1 is characterized in that: described display module (4) is the charactron display circuit.

7, real time intelligent temperature controller according to claim 1, it is characterized in that: described output module (7) comprise one the tunnel with (1) transistor that output terminal is connected of described micro controller module, with the relay that transistor is connected in series mutually, described micro controller module (1) thus described relay closure or openness are controlled in the conducting of driving transistors and disconnection.

8, real time intelligent temperature controller according to claim 1 is characterized in that: described communication module (8) is the communication module of RS-485 for bus.