CN2175385Y - Micro-computer controlled device for electric refrigerator - Google Patents

Abstract

The utility model belongs to a micro-computer controlled device for electric refrigerator, composed of a power supply, a temperature sensor, a main controller with SCM, programming and a display panel. The micro-computer controlled device for electric refrigerator has advantages of high control precision, fast reaction, good compatibility, no flushing, realizing mechanism and about 20% energy-saving. The micro-computer controlled device for electric refrigerator can also carry out the using function of digital display, selecting temperature controlling parameter and time controlling parameter by programming and adjustment. Furthermore, the micro-computer controlled device for electric refrigerator has functions of automatical defrosting, electric jumping, delayed protection in the condition of hyper or insufficient pressure, alarm and time dissemination, overcoming the existing disadvantages of single function, low control precision, bad commonality and reliability and no automatical defrosting when adopting the routine control way.

Description

Micro-computer controlled device for electric refrigerator

The utility model belongs to a kind of refrigerator (refrigerator-freezer) and uses control device, particularly a kind of device that adopts micro computer that the course of work of refrigerator is controlled automatically.

The widely used controller of refrigerator mostly is mechanical type or electronic type at present.Conventional mechanical control device function singleness, simply only mostly be and carry out temperature controlled device, this type of device is owing to adopt non-linear temperature control, therefore, temperature-control range is narrow, temperature-controlled precision is low, can only control the temperature of refrigerating chamber qualitatively, and freezer temperature then is subjected to the influence of temperature of refrigerating chamber, fluctuation with temperature of refrigerating chamber changes, thereby cause refrigerator temperature control uniformity poor, and easily make refrigerator be in excessive duty, increase energy consumption, at above-mentioned defective, domestic in recent years, designed a kind of electronic control device outward,, increase function because this device employing is discrete component, not only to increase hardware, and the connecting line increase, therefore reliability decrease exists function less equally, reliability, versatility is relatively poor and can not carry out disadvantages such as automatic defrosting.

The purpose of this utility model is a kind of controlling device for refrigerator that adopts micro computer to control of design; with reach temperature-controlled precision height, the linearity good, can select the temperature control scope by the user; can carry out automatic or manual defrost; cross, under-voltage and power-off protection; refrigerating chamber, temperature of refrigerating chamber, isoparametric Presentation Function of time; but also can adjust or be provided with new function by automated programming according to user's demand, and and it is easy to use, purpose such as energy-conservation.

Solution of the present utility model is: whole device is provided with power supply, temperature sensor, a master controller and a programming, display board four parts: power unit comprises that transformation, rectification, filtering and mu balanced circuit are to provide working power to The whole control device and compressor; Master controller then comprises a single-chip microcomputer, memory under program, A/D converter, two parallel output interfaces of tape drive, one control indicator lamp and the driver by executive circuit control compressor operating and give the correct time, warning circuit and voltage detecting circuit: the programming display board then comprises display screen, in order to programming and output, the keyboard and indicator lamp of input: whole master controller places on the printed panel and by 7 core flat conductors and plug and is connected with power unit, by three multicore flat conductors and corresponding plug, socket and programming, display board connects, and is connected with temperature sensor by A/D converter and two cores (or multicore) plug and socket; The The whole control device then is electrically connected with the city by the plug of power unit, be connected with compressor by lead, and fuse with the refrigerating chamber and the refrigerating chamber of refrigerator respectively by temperature sensor, programme, display board then is fixed on the refrigerator body, thereby constitute the control device of the utility model indication.In the master controller, single-chip microcomputer is by data/address bus, address bus and control bus while and memory under program, and the interface of A/D converter and tape drive connects; And by control bus and driver, voltage detecting circuit, give the correct time, warning circuit connects; Display screen and keyboard on the programming display board are connected with the output interface of tape drive with 9 core flat conductors by 6 cores respectively, and indicator lamp then is connected with driver on the master controller by 10 core flat conductors; Power unit and the executing agency that is attached thereto thereof also are connected with master controller by driver, also be provided with a piezo-resistance and produce to suppress current surge between the transformer input of power unit and power supply, prevent lightning damage.The utility model is promptly realized its goal of the invention by such scheme.

The utility model is owing to adopt microcomputerized control, so degree of accuracy height, control reaction are fast, high conformity and do not have overshoot, but realization mechanism and use energy-conservation about 20%; Can carry out the numeral demonstration and select temperature, the control point of time after adopting computer control, realize automatic defrosting, jump electricity, mistake, under-voltage overtime protection etc.; Owing to be provided with programming and output, input keyboard, so the user can utilize software programming adjustment in the memory under program and increase, subtract the function of refrigerator, and open and close at any time show parameter such as the state of temperature of each chamber and can not influence the working method that refrigerator is set.

Accompanying drawing and description of drawings

Fig. 1 is for the utility model is installed and the user mode schematic diagram;

Fig. 2 is the utility model control system schematic diagram;

Fig. 3 is the utility model signal flow block diagram;

Fig. 4, power unit and master controller annexation block diagram.

Among the figure: 1, be programming, display board; 2, master controller; 3, power supply, 4, refrigeratory body; 5, compressor; 101, single-chip microcomputer; 102, be memory under program; 103, be A/D converter; 104, be by output interface (tape drive); 105, be driver; 106 is voltage detecting circuit; 107 for warning, circuit gives the correct time; 108 is temperature sensor, 109, and display screen; 110, keyboard; 111, indicator lamp; 112, executive circuit; 120, be data/address bus; 121, be address bus; 122 is control bus.

Embodiment

Present embodiment is an example with long celebrating double-door refrigerator control device.Master controller: single-chip microcomputer 101, adopt P8031AH; Interior band timing/counter, CPU, 128/256 RAM, Pyatyi interrupt source; Memory under program 102 adopts the M2764AFI8K byte; A/D converter 103 models are ADC0809CCN, the I/O mouth; 108, two of temperature sensors, freezing, refrigerating chamber respectively is provided with one, connects with A/D converter by two core plugs and socket; Parallel output interface 104 adopts two 74LS377 parallel interfaces to join with driving display 109 work with driver GD74LS244 and GD74LSO7 respectively.Output, the input of supervisory keyboard signal simultaneously; Driver 105 adopts a slice GD74LSO7 with 111 work of control indicator lamp and opening, stopping by executive circuit 112 control compressors; Thereby executive circuit 112 is to adopt a 4N25 photoelectrical coupler to drive triode with the adhesive of control relay JQX-13FC and opening, stopping of disconnection control compressor; Voltage detecting circuit 106 adopts a sample circuit and the voltage comparator GD324 that is attached thereto and two light emitting diodes to form; The warning circuit that gives the correct time adopt two music-integrating blocks, two loudspeaker and matched with it triode, resistance to form to give the correct time, report to the police operating circuit and be connected with control bus 122 with control give the correct time, the generation of alarm signal.Programming, display board 1: display 109, keyboard 110, indicator lamp 111 all is located at this plate.Display 109, adopt 6 altogether cloudy red charactrons, model is TLSS47R as the keyboard 110 of programming and data output, input, then adopts 7 to touch button switch, one end of switch joins through current-limiting resistance and power supply, and the other end is connected with driver on 104; Indicator lamp 111 adopts 6 light emitting diodes (color can be different); Power unit 3 adopts transformer transformation, bridge rectifier capacitor filtering and three-terminal voltage-stabilizing circuit, connects a piezo-resistance (YM) simultaneously between the transformer of power supply and mains supply, suppresses current surge to prevent thunderbolt.After this power unit and civil power are connected,, provide 5V and 6V working direct current to the master controller of this device etc. respectively after rectification, filtering, the voltage stabilizing through the transformer step-down.Data/address bus 120, address bus 121, control bus 122 all adopt 8 core leads.Single-chip microcomputer 101 passes through three buses and memory under program 102, A/D converter 103, and output interface 104 connects; Simultaneously by control bus 122 give the correct time with driver 105, voltage detecting circuit 106, warning circuit 107 is connected.During installation, two temperature sensors 108 of this device are loaded on the refrigerating chamber and the refrigerating chamber of refrigerator respectively; Programming display board 1 then is fixed on the refrigerator body, and power unit 3 places by the compressor and by lead to be connected with compressor.Be equipped with corresponding software in the use and can realize its control function, this control device also is available for users to programming and selects the control parameter except that being provided with fixing automatic option program system, and its programming mode is as follows:

If the refrigerator work mode be set be: freezer temperature scope-18 ℃～-24 ℃, the clock his-and-hers watches to noon 12:10 divided 00 second, the automatic defrosting time interval is every 3 days once, alarm clock is given the correct time, do not had to the automatic Chinese language of integral point, then programmed method is: connect power supply, the Set-up prompting appears in the bright and display screen 109 of power supply indicator, and the user presses (setting) key at this moment, occurs Prg=0 on the screen 0, cursor drops on the flicker of last O place, thus the time correspondence the freezer temperature control range be-15 °～21 ℃, so press (setting) key again, appearance-1 on the screen 5L21; cursor drops on 5 flickers; this moment, the user can be continuously by three (adding) keys, and screen then occurs-18L25, because this program is to determine its shutdown temperature according to the refrigerating chamber turn-on temperature automatically; admittedly occur 25; this moment, cursor then dropped down onto last 5 places, position again by (setting) key, then again by once (subtracting) key; screen then occurs satisfactory-18L24 printed words: defrost blanking time is set: (connecting program) again by (settings) key, screen appearance 0 2Dooh, cursor drop on 2 places, and by pressing (setting) key behind (adding) key again, 03do then appears in screen oH, cursor drop on preceding last the o place of h; Again by (setting) key, occur the 000132(back computer timing of representing to plug on the screen and also be default) to this time value one constantly, again continuously by (adding) key 14 times or by once (subtract) (be equivalent to by 11 times (adding) again by three (adding) keys, occur 120 on the screen 139, again by (setting) key, after treating that cursor moves on to the 4th 1, continuously by demonstrating 121047(47 second on 9 (adding) key screens) for supposing, again by (setting) key, cursor is moved on to last position during 7 places, and by (subtracting) key 0 back that disappears second is shown that 121000 achieve the goal: press the operation key this moment, shows 121000 and enter control program by the demonstration time on the screen.As want displays temperature, need only get final product by once (adding) key again.

If plug at refrigerator, power supply indicator is bright, and display screen is pressed as user's no key in 3 minutes after showing Set-up, then changes the program automatic selective system over to, and selects 0 cover program work.This moment, each parameter was: refrigerating chamber temperature control scope-15 ℃～-21 ℃; when time set is 000300(, minute, second) the automatic defrosting time interval is 2 days; the corresponding indicator lamp of compressor start (temperature＞-15 ℃ time) is bright; cross, undervoltage warning shuts down; no alarm clock; when automatic Chinese Chinese language gives the correct time, shows time 000300(, minute, second), opening the door time-delay was reported to the police in 50 seconds.

Claims (4)

1, a kind of use in refrigerator micro-computer controlling apparatus comprises power unit, temperature sensor, and master controller, it is characterized in that he also comprises a programming, display board; Power unit comprises that transformation, rectification, filtering and mu balanced circuit are to provide working power to The whole control device and compressor: master controller then comprises two parallel output interfaces of a single-chip microcomputer, memory under program, A/D converter, tape drive, a control indicator lamp and the driver by executive circuit control compressor operating and give the correct time, warning circuit, voltage detecting circuit; Programming, display board then comprise display screen, keyboard and indicator lamp; Whole master controller places on the printed panel and connects with power unit by 7 core flat conductors and plug, socket: be connected with programming, display board by three multicore flat conductors and corresponding plugs and sockets; Be connected with temperature sensor and pass through two cores or multi-pin connector and socket; The The whole control device then is electrically connected with the city by the plug of power unit, be connected with compressor by lead, and fuse with the refrigerating chamber and the refrigerating chamber of refrigerator respectively by temperature sensor, programming, display board then are fixed on the refrigerator body, thereby constitute the control device of the utility model indication.

2, by the described a kind of use in refrigerator micro-computer controlling apparatus of claim 1, it is characterized in that the single-chip microcomputer in the master controller passes through data/address bus, address bus and control bus while and memory under program, the output interface of A/D converter and tape drive connects, and by control bus and driver, voltage detecting circuit gives the correct time, warning circuit connects.

3, by the described a kind of use in refrigerator micro-computer controlling apparatus of claim 1, it is characterized in that describedly passing through three multicore flat conductors and corresponding plug, socket is connected with programming, display board, be meant by 6 cores, 9 cores, three flat conductors of 10 cores to be connected with display screen, keyboard and indicator lamp on the programming display board respectively.

4, by the described a kind of use in refrigerator micro-computer controlling apparatus of claim 1, wherein the The whole control device then the plug by power unit be electrically connected with the city, it is characterized in that between the transformer input of power unit and power supply, also being provided with a piezo-resistance with the surge generation of electric current of inhibition.

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