CN2302485Y - Computer controller for refrigerator - Google Patents
Computer controller for refrigerator Download PDFInfo
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- CN2302485Y CN2302485Y CN 97237096 CN97237096U CN2302485Y CN 2302485 Y CN2302485 Y CN 2302485Y CN 97237096 CN97237096 CN 97237096 CN 97237096 U CN97237096 U CN 97237096U CN 2302485 Y CN2302485 Y CN 2302485Y
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Abstract
The utility model relates to a control device for a cold storage. Corresponding input terminals of an input port and an output port of a monolithic computer are respectively connected with temperature measuring circuit of a cold storage and a temperature measuring circuit of an evaporator, and a memory circuit is in two-way connection with the input port and the output port of the monolithic computer; corresponding output ends of the input port and the output port of the monolithic computer are respectively connected with a display circuit, a control circuit of an air cooling machine, a control circuit of a compressor and a defrosting control circuit. When provided with relevant software, the monolithic computer can control the temperature and the defrosting operation of the cold storage, and can also carry out malfunction detection, etc. The device has the advantages of convenient operation, reliable operation and strong function.
Description
The utility model relates to a kind of control device that is used on the freezer.
The existing control device that is used on the freezer generally is the mechanical type temperature controller.The principle of sort controller is, makes the closing of contact or disconnection by thermometal sheet interlock lever, and the loop of control compressor operating is switched on or switched off, thereby can make compressor start or stop.The temperature resolution of this temperature controller is ± 2.5 ℃, and has only single function of temperature control.As its improvement, existing at present device with computer control freezer, by temperature sensor the temperature of being experienced is delivered on the temperature controller, computer then sends the temperature of instruction with the control freezer by certain program to temperature controller, just carries out temperature adjustment automatically according to temperature outside storage food kind and the storehouse in the storehouse.The temperature resolution of this thermostat improves, but its function is still more single.Chinese patent application CN2091437U has proposed a kind of " freezer computer automation frost temperature controller ", sort controller not only has temperature control function, but also have automatic defrosting, temperature display function, but its function is still simpler, and circuit structure is also comparatively complicated.
The purpose of this utility model is, provides that a kind of function is strong, temperature resolution is higher and the relatively simple freezer computer controller of circuit structure.
The technical scheme that realizes the utility model purpose is (referring to Fig. 1), this device has single-chip microcomputer (1), crystal oscillating circuit (11), display circuit (2), temperature of ice house measuring circuit (31), evaporator temperature measuring circuit (32), crystal oscillating circuit (11) links to each other with the crystal oscillator end of single-chip microcomputer (1), the input/output terminal of single-chip microcomputer (1) links to each other with the input of display circuit (2), the output of evaporator temperature measuring circuit (32) connects the input/output terminal of single-chip microcomputer (1), it is characterized in that, this device also has keyboard circuit (4), memory circuit (5), compressor Control Cprant (61), air-cooler control circuit (62) and defrost control circuit (63), keyboard circuit (4) links to each other with the input/output terminal of single-chip microcomputer (1), the output of temperature of ice house measuring circuit (31) links to each other with the input/output terminal of single-chip microcomputer (1), memory circuit (5) links to each other with the input/output terminal of single-chip microcomputer (1), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of air-cooler control circuit (62), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of compressor Control Cprant (61), and the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of defrost control circuit (63).
Referring to Fig. 2, above-mentioned memory circuit (5) is E
2PROM electrically-erasable formula holder, the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of memory circuit (5), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the address input end of memory circuit (5), and the data terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the data terminal of memory circuit (5).Display circuit (2) has bidirectional bus transmitter-receiver (21), drive circuit (22), light-emitting diode display (23) and display control circuit (24), the input of bidirectional bus transmitter-receiver (21) links to each other with the data terminal of the input/output terminal of single-chip microcomputer (1), the output of bidirectional bus transmitter-receiver (21) links to each other with the input of drive circuit (22), each outlet terminal of the output of drive circuit (22) links to each other by the signal input part of resistance with light-emitting diode display (23), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of display control circuit (24), the output of display control circuit (24) links to each other with the control end of light-emitting diode display (23), and the outlet terminal that the control end with memory circuit (5) of single-chip microcomputer (1) links to each other allows end to link to each other by reverser with the three-state of bidirectional bus transmitter-receiver (21).Keyboard circuit (4) is formed the matrix keyboard circuit by a plurality of buttons or switch, and an end of each switch links to each other with the outlet terminal of the input/output terminal of single-chip microcomputer (1), and the other end of switch links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1).Temperature of ice house measuring circuit (31) is made up of reference resistance R21, thermistor RT1 and capacitor C 10, reference resistance R21 links to each other with thermistor RT1 and constitutes sample circuit, one end of sample circuit is that power end, the other end link to each other with ground, reference resistance R21 links to each other with the A/D input port of single-chip microcomputer (1) with the common junction of thermistor RT1, and is connected with filter capacitor C10 between this common junction and ground.Evaporator temperature measuring circuit (32) is made up of reference resistance R18, thermistor RT2 and filter capacitor C11, reference resistance R18 links to each other with thermistor RT2 and constitutes sample circuit, one end of sample circuit is that power end, the other end link to each other with ground, reference resistance R18 links to each other with the A/D input port of single-chip microcomputer (1) with the common junction of thermistor RT2, and is connected with filter capacitor C11 between this common junction and ground.Compressor Control Cprant (61) is made up of indicating circuit and relay control output circuit, indicating circuit is made up of LED 1, triode Q1 and resistance R 2, the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with resistance R 2, the other end of R2 links to each other with the base stage of Q1, the colelctor electrode of Q1 links to each other with the negative pole of LED1, the just very power end of LED1, the grounded emitter of Q1; Relay control output circuit is made up of relay J 1, clamp diode D8, power compound circuit, resistance R 23 and arc-suppression circuit; The power compound circuit is by a NPN triode and PNP triode is compound constitutes, the outlet terminal that links to each other with resistance R 2 of the input/output terminal of single-chip microcomputer (1) links to each other with R23, the other end of R23 links to each other with the base stage of power compound circuit, the grounded collector of power compound circuit, the emitter stage of power compound circuit links to each other with an end of the coil of J1, the J1 coil other end is a power end, and D8 is attempted by between the two ends of J1 coil; One end of the break-make parts of J1 is the power end that can link to each other with civil power, the other end is the terminals that can link to each other with an end of ac contactor coil, arc-suppression circuit is made of resistance R 101 and capacitor C 20 serial connections, and arc-suppression circuit is attempted by between the two ends of break-make parts of J1.Air-cooler control circuit (62) is made up of relay J 2, clamp diode D9, power compound circuit, resistance R 24 and arc-suppression circuit; The power compound circuit is by a NPN triode and PNP triode is compound constitutes, the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with R24, the other end of R24 links to each other with the base stage of power compound circuit, the grounded collector of power compound circuit, the emitter stage of power compound circuit links to each other with an end of the coil of J2, the J2 coil other end is a power end, and D9 is attempted by between the two ends of J2 coil; One end of the break-make parts of J2 is the power end that can link to each other with civil power, the other end is the terminals that can link to each other with an end of ac contactor coil, arc-suppression circuit is made of resistance R 102 and capacitor C 22 serial connections, and arc-suppression circuit is attempted by between the two ends of break-make parts of J2.Defrost control circuit (63) is made up of indicating circuit and relay control output circuit, and indicating circuit is made up of LED 2, triode Q2 and resistance R 3; The outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with resistance R 3, and the other end of R3 links to each other with the base stage of Q2, and the colelctor electrode of Q2 links to each other with the negative pole of LED2, the just very power end of LED2, the grounded emitter of Q2; Relay control output circuit is made up of relay J 3, clamp diode D7, power compound circuit, resistance R 26 and arc-suppression circuit; The power compound circuit is by a NPN triode and PNP triode is compound constitutes, the outlet terminal that links to each other with resistance R 3 of the input/output terminal of single-chip microcomputer (1) links to each other with R26, the other end of R26 links to each other with the base stage of power compound circuit, the grounded collector of power compound circuit, the emitter stage of power compound circuit links to each other with an end of the coil of J3, the J3 coil other end is a power end, and D7 is attempted by between the two ends of J3 coil; One end of the break-make parts of J3 is the power end that can link to each other with civil power, the other end is the terminals that can link to each other with an end of ac contactor coil, arc-suppression circuit is made of resistance R 103 and capacitor C 21 serial connections, and arc-suppression circuit is attempted by between the two ends of break-make parts of J3.
Referring to Fig. 1 and Fig. 2, this device also has three phase mains holding circuit (71), compressor high-low pressure holding circuit (72), overload of compressor holding circuit (73) and air-cooler overload protecting circuit (74).Three phase mains holding circuit (71) is made up of resistance R 51, R52, R53, capacitor C 51, C52, relay J 4, the end of R51 is an end that can link to each other with the A of three phase mains, the other end of R51 links to each other with an end of J4 coil, the end of C51 is an end that can link to each other with the B of three phase mains, the other end of C51 links to each other with the common junction of J4 coil with R51, and the J4 coil other end is an end that can link to each other with the C of three phase mains; R52 connects with C52, and the other end of C52 links to each other with the common junction of J4 coil with R51, and the other end of R52 links to each other with the other end of J4 coil, also is the end of the other end for linking to each other with the C of three phase mains of R52; One end ground connection of the break-make parts of J4, the other end link to each other with the input terminal of the input/output terminal of single-chip microcomputer (1), and the end of R53 links to each other with the common junction of J4 break-make parts with single-chip microcomputer (1), and the other end of R53 is a power end.Compressor high-low pressure holding circuit (72) is made up of resistance R 15, capacitor C 8 and high-low pressure force controller K1; R15 connects with C8; the other end of R15 is a power end; the other end ground connection of C8; the common port of R15 and C8 links to each other with the end of K1; the other end ground connection of K1, the common port of R15 and C8 links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1).Overload of compressor holding circuit (73) is made up of resistance R 17, capacitor C 9 and electrothermal relay K2; R17 connects with C9; the other end of R17 is a power end, the other end ground connection of C9, and the common port of R17 and C9 links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1).Air-cooler overload protecting circuit (74) is made up of resistance R 20, capacitor C 7 and electrothermal relay K3; R20 connects with C7; the other end of R20 is a power end, the other end ground connection of C7, and the common port of R20 and C7 links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1).
This device also has sound alarm circuit (64), sound alarm circuit (64) has resistance R 16, triode Q13 and sounding component FM, the end of R16 links to each other with the base stage of Q13, the colelctor electrode of Q13 links to each other with the end of FM, the grounded emitter of Q13, the other end of FM is a power end, and the other end of R16 links to each other with the outlet terminal of the input/output terminal of single-chip microcomputer (1).
This device also has electronic lock circuit (65), electronic lock circuit (65) has resistance R 105, capacitor C 55 and electronic lock K4, the end of R105 is a power end, the other end links to each other with the end of electronic lock K4, the other end ground connection of electronic lock K4, the common port of R105 and electronic lock links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1), and C55 is connected in parallel between the two ends of K4.
The utlity model has positive effect: (1) this apparatus function is stronger, can the storehouse temperature be set by keyboard after cooperating relevant software, when storehouse temperature actual value sets value more than or equal to start, then start compressor and air-cooler work, when storehouse temperature actual value is less than or equal to the shutdown setting value, then turn-off compressor and air-cooler; This device also can be provided with defrost periods by keyboard, when the compressor accumulative total working time then starts electric calorifie installation during more than or equal to setting-up time and carries out defrost, when electric calorifie installation is heated to setting-up time or evaporator temperature then stops defrost and can carry out manual defrost by keyboard greater than uniform temperature (for example 10 degree).(2) this device also has relevant fault detection capability, produce when detecting that phase shortage, phase sequence are not too high or too low to, overload of compressor, blower fan overload, compressor pressure, sensor fault etc., all can react, stop compressor and blower fan work, and show corresponding failure code by display, also carry out audible alarm simultaneously.(3) after this device is set up the electronic lock function, the data of setting can be locked.Have only and place the position of connection just can carry out the setting of relevant numerical value again electronic lock.(4) this device also has the outage memory function.(5) the temperature resolution of this device is ± 0.5 ℃.This device is not only easy to operate, reliable operation, and can control the multiple parameter of freezer, and circuit structure is very relatively simple, and function is but comparatively powerful, is a kind of comprehensive control device, helps the update of freezer product.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is a kind of electrical schematic diagram of the present utility model.
Fig. 3 is the schematic diagram that is used for panel of the present utility model.
Fig. 4 is the used main program block diagram of single-chip microcomputer of the present utility model.
Fig. 5 is and the corresponding keyboard interrupt service subprogram of Fig. 4 block diagram.
Fig. 6 handles storehouse temperature setting subprogram block diagram in the subprogram with the corresponding key of Fig. 4.
Fig. 7 is the electrical schematic diagram that is used for power circuit of the present utility model.
Below in conjunction with drawings and Examples the utility model being done a step describes.
The components and parts that each is relevant connect by the annexation of the electrical schematic diagram of Fig. 2, and wherein the model of single-chip microcomputer (1) is MC68HC705SR3P, include 32 I/O mouths, 4 A/D input ports, 4K internal memory; The model of memory circuit (5) is AT28C16, the model of bidirectional bus transmitter-receiver (21) is 74LS248, the model of drive circuit (22) is MC1413, the model of thermistor RT1 is TS-92148, the type of RT2 is TS-92149, the model of high-low pressure force controller K1 is YK306, and the model of electrothermal relay K2 and K3 is a CR-D series of heat relay.Display circuit (4) is a nixie display, and the model of relay J 1, J2, J3 is QJE-SS-112DM.
See Fig. 2 and Fig. 3, before this device uses, to be arranged on the middle part in the freezer as the thermistor RT1 of storehouse temperature sensor, will be arranged on cover as the thermistor RT2 of defrosting sensor and send out on the fin of device, high-low pressure force controller K1 will be linked to each other with the high-pressure side and the low-pressure end of compressor.Electrothermal relay K2 is serially connected in the load circuit of motor of compressor, electrothermal relay K3 is serially connected in the load circuit of motor of air-cooler.When this device uses, connect power supply earlier, make this device shown in Figure 7 power circuit (9) electric, 220 volts of supply voltages after transformer transformation, rectification, filtering, voltage stabilizing, output+12V ,+two groups of voltages of 5V; The operating voltage of 12V is transported to compressor Control Cprant (61), air-cooler control circuit (62) and defrost control circuit (63), and the operating voltage of 5V is transported to the power end of all the other relevant parts of this device circuit.
See Fig. 4, when 4 pin VCC of single-chip microcomputer (1) get electric after, inner program begins to start, single-chip microcomputer (1) initialization, and will originally set the Ku Wen that is retained in the memory circuit (5) by data wire, storehouse temperature return difference, defrost periods, the parameter of defrost time is read in the single-chip microcomputer (1), it also is the PC2 output low level of single-chip microcomputer (1), gating memory chip 28C16, PC2 is after 74LS04 is anti-phase simultaneously, become high level, make 74LS245 become high-impedance state output, memory circuit (5) and display circuit (2) are isolated, just can be by the setting value of single-chip microcomputer (1) reading and saving in memory circuit (5).The voltage signal of the reflection storehouse temperature that temperature of ice house measuring circuit (31) records enters single-chip microcomputer (1) by 24 pin of single-chip microcomputer (1), converting data signal to by the A/D converter in the single-chip microcomputer (1) compares through the numerical value of the library representation temperature of ALU and setting, if measured signal data T then respectively exports a high level by single-chip microcomputer (1) from 40 pin PA7 and 17 pin PD7 more than or equal to the storehouse temperature numerical value T0 that sets and return difference Δ T sum and makes the relay J 1 of compressor Control Cprant (61) and relay J 2 adhesives of air-cooler control circuit (62), control compressor, air-cooler startup work.When being less than or equal to, storehouse temperature T sets storehouse temperature T0 and compressor continuous operation above 7 minutes, then PA7, PD7 output low level, and relay J 1 and J2 disconnection, compressor, air-cooler quit work.
As compressor accumulative total working time CCT1 during more than or equal to the defrost periods CT1 that sets, detect the storehouse temperature by 24 pin PD0, Ruo Kuwen is less than subzero 3 ℃, and then 39 pin PA6 of single-chip microcomputer (1) export high level, relay J 3 adhesives of defrost control circuit (63) make defrosting heater work.In defrost process, if the residue defrost time CCT2 equal 0 or evaporator temperature T2 more than or equal to 10 ℃, 39 pin PA6 output low levels of single-chip microcomputer (1) then, relay J 3 disconnects, stops defrost, the PA7 of while single-chip microcomputer (1), PD7 exports high level, and J1, J2 adhesive make compressor and air-cooler startup work.
See Fig. 5, in service at main program, during as if any one key in button 81～89 keys of the keyboard circuit (4) of pressing this device, then determine to change over to the keyboard interrupt service subprogram by program.This subprogram is time-delay earlier, line scanning then, send the row sign indicating number and forms the key code, returns main program then.Declare when not block of key input is arranged when main program moves to, then change corresponding key over to and handle subprogram according to the key code that forms in the keyboard interrupt service subprogram.After corresponding key is handled the subprogram activation end; change the fault detection program section over to; single-chip microcomputer (1) constantly detects the level of 16 pin PC7,15 pin PC6,21 pin PD3,22 pin PD2,24 pin PD0,23 pin PD1; if the high-low pressure force controller K1 of high-low pressure holding circuit (72) disconnects because of compressor pressure is too high or too low; then PC7 becomes high level, and single-chip microcomputer (1) is declared high-low pressure holding circuit (72) and broken down.If the electrothermal relay K2 of overload of compressor holding circuit (73) is because of overheat of compressor disconnects, then PC6 becomes high level, single-chip microcomputer (1) is declared compressor protection circuit (73) and is broken down.If the electrothermal relay K3 of air-cooler overload protecting circuit (74) disconnects because of air-cooler is overheated, then PD3 becomes high level, and the holding circuit (74) that single-chip microcomputer (1) is declared the air-cooler overload breaks down.When if three phase mains holding circuit (71) produces phase shortage, phase sequence wrong or three-phase imbalance, 4 disconnections of relay J, and make the PD2 value be high level, single-chip microcomputer (1) is declared three phase mains holding circuit (71) and is broken down.The thermistor RT1 short circuit or the open circuit of Ruo Kuwen testing circuit (31), then PD0 be 0 volt or+5V, then single-chip microcomputer (1) is declared storehouse temperature testing circuit (31) and is broken down.If the thermistor RT2 short circuit of evaporator temperature measuring circuit (32) or open circuit, then PD1 be 0 volt or+5V, then single-chip microcomputer (1) is declared evaporator temperature measuring circuit (32) and is broken down.When single-chip microcomputer (1) detects above-mentioned any fault, all in PA7, PD7, PA6 output low level, thus close compressor and air-cooler or stop defrost.Simultaneously at PD6 output high level, make warnings of sounding of the buzzer of warning circuit (64), show the letter or number code of representing corresponding failure on the light-emitting diode display in display circuit (2) simultaneously.If when operation troubles trace routine section, do not break down, then the program block that is returned to comparison storehouse temperature and setting value circulates and carries out.
See Fig. 3, key is handled subprogram one and is had 7, corresponding with 7 buttons on the panel, from button 81 to 83,86 to 89, pairing key processing subprogram is respectively defrost periods subprogram, defrost chronon program, manually defrost subprogram, storehouse temperature are set subprogram, return difference is set subprogram, emergent subprogram and the emergent shutdown subprogram of starting shooting.Below the storehouse temperature being set subprogram specifically describes:
See Fig. 6, subprogram will show that earlier knowing sign in addition is changed to setup parameter and shows (fpT puts 1), demonstration time of setup parameter is changed to 5 seconds (num2 puts 5), declare remaining setup parameter and show whether the time is 0, if 0 will show that distinguishing mark is changed to the storehouse temperature mode (fpt puts 0) that shows, and preserve storehouse temperature setting value T0, return main program again; If remaining setting-up time is not 0, then declare earlier and have or not the add-substract key input, if increase key (84), then on the original storehouse temperature value of setting, add 1, if reduce key (85), then on the original storehouse temperature value of setting, subtract 1, circular flow increases or reduces the block of setting storehouse temperature value and shows storehouse temperature value up to the end of 5 second time, preserve setting value T0, return main program.But wherein setting storehouse temperature value maximum can not be greater than 20 ℃, and setting storehouse temperature value minimum can not be less than 45 ℃.The operation of all the other subprograms operation mutually roughly the same, if by defrost periods key (81), then can set defrost periods, setting range is 1～24 hour, by increasing key (84), increasing by 1 hour, by reducing key (85), minimizing one hour; If be set at 24 hours, then do not carry out automatic defrosting.If by defrost time key (82), can set the defrost time, setting range is 10～50 minutes; By increasing key (84), then increasing by 5 minutes, by reducing key (85), then reducing 5 minutes.By manual defrost key (83), then carry out manual defrost, whenever by once, defrost 10 minutes is 30 minutes to the maximum.By return difference setting key (87), storehouse temperature return difference is set, setting range is 1～10 ℃, then increases by 1 ℃ by increasing key (84), then reduces 1 ℃ by reducing key (85).By emergent key (88) then force start compressor and the air-cooler of starting shooting.By closing key (89) then positive closing compressor and the air-cooler of meeting an urgent need.
The parts that are installed on the panel also have display (23), run indicator LED1, defrost indicator lamp LED2 and electronic lock K4, display (23) shows the storehouse temperature when this controller is worked, when setting each parameter, show each parameter value, setting finished after 5 seconds, got back to the storehouse temperature again and showed.When having detected fault, then show failure code.Wherein: E01 represents phase shortage, phase sequence wrong or three-phase imbalance, E02 represents that compressor pressure is too high or too low, E03 represents overload of compressor, E04 represents the air-cooler overload, E05 represents the thermistor RT1 open circuit as the storehouse temperature sensor, E06 represents the RT1 short circuit, and E07 represents the thermistor RT2 open circuit as the evaporator fin sensor, and E08 represents the RT2 short circuit.
Represent compressor operating when luminous as the LED 1 of run indicator.Represent that freezer is carrying out defrost as the LED 2 of defrost indicator lamp when luminous.
The utility model when work, constantly detect the 32 pin PB7 that link to each other with electronic lock circuit (65), as if PB7 be low level, then CPU forbids keyboard interrupt at this moment, promptly pins keyboard.If PB7 is a high level, then CPU allows keyboard interrupt, and electronic lock K4 places " S " position, electronic lock K4 connects; PB7 be low level then guidance panel is lockable, can not resets parameter, electronic lock K4 places " W " position, electronic lock K4 disconnects, PB7 is a high level, can be provided with the operation of parameter this moment by guidance panel.
Claims (5)
1, a kind of freezer computer controller, has single-chip microcomputer (1), crystal oscillating circuit (11), display circuit (2), temperature of ice house measuring circuit (31), evaporator temperature measuring circuit (32), crystal oscillating circuit (11) links to each other with the crystal oscillator end of single-chip microcomputer (1), the input/output terminal of single-chip microcomputer (1) links to each other with the input of display circuit (2), the output of evaporator temperature measuring circuit (32) connects the input/output terminal of single-chip microcomputer (1), it is characterized in that, this device also has keyboard circuit (4), memory circuit (5), compressor Control Cprant (61), air-cooler control circuit (62) and defrost control circuit (63), keyboard circuit (4) links to each other with the input/output terminal of single-chip microcomputer (1), the output of temperature of ice house measuring circuit (31) links to each other with the input/output terminal of single-chip microcomputer (1), memory circuit (5) links to each other with the input/output terminal of single-chip microcomputer (1), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of air-cooler control circuit (62), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of compressor Control Cprant (61), and the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of defrost control circuit (63).
2, device according to claim 1 is characterized in that, memory circuit (5) is E
2PROM electrically-erasable formula holder, the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of memory circuit (5), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the address input end of memory circuit (5), and the effect of the input/output terminal of single-chip microcomputer (1) links to each other with the data terminal of memory circuit (5) according to end;
Display circuit (2) has bidirectional bus transmitter-receiver (21), drive circuit (22), light-emitting diode display (23) and display control circuit (24), the input of bidirectional bus transmitter-receiver (21) links to each other with the data terminal of the input/output terminal of single-chip microcomputer (1), the output of bidirectional bus transmitter-receiver (21) links to each other with the input of drive circuit (22), each outlet terminal of the output of drive circuit (22) links to each other by the signal input part of resistance with light-emitting diode display (23), the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with the control end of display control circuit (24), the output of display control circuit (24) links to each other with the control end of light-emitting diode display (23), and the outlet terminal that the control end with memory circuit (5) of single-chip microcomputer (1) links to each other allows end to link to each other by reverser with the three-state of bidirectional bus transmitter-receiver (21);
Keyboard circuit (4) is formed the matrix keyboard circuit by a plurality of buttons or switch, and an end of each switch links to each other with the outlet terminal of the input/output terminal of single-chip microcomputer (1), and the other end of switch links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1);
Temperature of ice house measuring circuit (31) is made up of reference resistance R21, thermistor RT1 and capacitor C 10, reference resistance R21 links to each other with thermistor RT1 and constitutes sample circuit, one end of sample circuit is that power end, the other end link to each other with ground, reference resistance R21 links to each other with the A/D input port of single-chip microcomputer (1) with the common junction of thermistor RT1, and is connected with filter capacitor C10 between this common junction and ground;
Evaporator temperature measuring circuit (32) is made up of reference resistance R18, thermistor RT2 and filter capacitor C11, reference resistance R18 links to each other with thermistor RT2 and constitutes sample circuit, one end of sample circuit is that power end, the other end link to each other with ground, reference resistance R18 links to each other with the A/D input port of single-chip microcomputer (1) with the common junction of thermistor RT2, and is connected with filter capacitor C11 between this common junction and ground;
Compressor Control Cprant (61) is made up of indicating circuit and relay control output circuit, indicating circuit is made up of LED 1, triode Q1 and resistance R 2, the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with resistance R 2, the other end of R2 links to each other with the base stage of Q1, the colelctor electrode of Q1 links to each other with the negative pole of LED1, the just very power end of LED1, the grounded emitter of Q1; Relay control output circuit is made up of relay J 1, clamp diode D8, power compound circuit, resistance R 23 and arc-suppression circuit; The power compound circuit is by a NPN triode and PNP triode is compound constitutes, the outlet terminal that links to each other with resistance R 2 of the input/output terminal of single-chip microcomputer (1) links to each other with R23, the other end of R23 links to each other with the base stage of power compound circuit, the grounded collector of power compound circuit, the emitter stage of power compound circuit links to each other with an end of the coil of J1, the J1 coil other end is a power end, and D8 is attempted by between the two ends of J1 coil; One end of the break-make parts of J1 is the power end that can link to each other with civil power, the other end is the terminals that can link to each other with an end of ac contactor coil, arc-suppression circuit is made of resistance R 101 and capacitor C 20 serial connections, and arc-suppression circuit is attempted by between the two ends of break-make parts of J1;
Air-cooler control circuit (62) is made up of relay J 2, clamp diode D9, power compound circuit, resistance R 24 and arc-suppression circuit; The power compound circuit is by a NPN triode and PNP triode is compound constitutes, the outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with R24, the other end of R24 links to each other with the base stage of power compound circuit, the grounded collector of power compound circuit, the emitter stage of power compound circuit links to each other with an end of the coil of J2, the J2 coil other end is a power end, and D9 is attempted by between the two ends of J2 coil; One end of the break-make parts of J2 is the power end that can link to each other with civil power, the other end is the terminals that can link to each other with an end of ac contactor coil, arc-suppression circuit is made of resistance R 102 and capacitor C 22 serial connections, and arc-suppression circuit is attempted by between the two ends of break-make parts of J2;
Defrost control circuit (63) is made up of indicating circuit and relay control output circuit, and indicating circuit is made up of LED 2, triode Q2 and resistance R 3; The outlet terminal of the input/output terminal of single-chip microcomputer (1) links to each other with resistance R 3, and the other end of R3 links to each other with the base stage of Q2, and the colelctor electrode of Q2 links to each other with the negative pole of LED2, the just very power end of LED2, the grounded emitter of Q2; Relay control output circuit is made up of relay J 3, clamp diode D7, power compound circuit, resistance R 26 and arc-suppression circuit; The power compound circuit is by a NPN triode and PNP triode is compound constitutes, the outlet terminal that links to each other with resistance R 3 of the input/output terminal of single-chip microcomputer (1) links to each other with R26, the other end of R26 links to each other with the base stage of power compound circuit, the grounded collector of power compound circuit, the emitter stage of power compound circuit links to each other with an end of the coil of J3, the J3 coil other end is a power end, and D7 is attempted by between the two ends of J3 coil; One end of the break-make parts of J3 is the power end that can link to each other with civil power, the other end is the terminals that can link to each other with an end of ac contactor coil, arc-suppression circuit is made of resistance R 103 and capacitor C 21 serial connections, and arc-suppression circuit is attempted by between the two ends of break-make parts of J3.
3, device according to claim 1 and 2 is characterized in that, this device also has three phase mains holding circuit (71), compressor high-low pressure holding circuit (72), overload of compressor holding circuit (73) and air-cooler overload protecting circuit (74);
Three phase mains holding circuit (71) is made up of resistance R 51, R52, R53, capacitor C 51, C52, relay J 4, the end of R51 is an end that can link to each other with the A of three phase mains, the other end of R51 links to each other with an end of J4 coil, the end of C51 is an end that can link to each other with the B of three phase mains, the other end of C51 links to each other with the common junction of J4 coil with R51, and the J4 coil other end is an end that can link to each other with the C of three phase mains; R52 connects with C52, and the other end of C52 links to each other with the common junction of J4 coil with R51, and the other end of R52 links to each other with the other end of J4 coil, also is the end of the other end for linking to each other with the C of three phase mains of R52; One end ground connection of the break-make parts of J4, the other end link to each other with the input terminal of the input/output terminal of single-chip microcomputer (1), and the end of R53 links to each other with the common junction of J4 break-make parts with single-chip microcomputer (1), and the other end of R53 is a power end;
Compressor high-low pressure holding circuit (72) is made up of resistance R 15, capacitor C 8 and high-low pressure force controller K1, R15 connects with C8, the other end of R15 is a power end, the other end ground connection of C8, the common port of R15 and C8 links to each other with the end of K1, the other end ground connection of K1, the common port of R15 and C8 links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1);
Overload of compressor holding circuit (73) is made up of resistance R 17, capacitor C 9 and electrothermal relay K2, R17 connects with C9, the other end of R17 is a power end, the other end ground connection of C9, and the common port of R17 and C9 links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1);
Air-cooler overload protecting circuit (74) is made up of resistance R 20, capacitor C 7 and electrothermal relay K3; R20 connects with C7; the other end of R20 is a power end, the other end ground connection of C7, and the common port of R20 and C7 links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1).
4, device according to claim 1 and 2, it is characterized in that, this device also has sound alarm circuit (64), sound alarm circuit (64) has resistance R 16, triode Q13 and sounding component FM, the end of R16 links to each other with the base stage of Q13, and the colelctor electrode of Q13 links to each other the grounded emitter of Q13 with the end of FM, the other end of FM is a power end, and the other end of R16 links to each other with the outlet terminal of the input/output terminal of single-chip microcomputer (1).
5, device according to claim 1 and 2, it is characterized in that, this device also has electronic lock circuit (65), electronic lock circuit (65) has resistance R 105, capacitor C 55 and electronic lock K4, the end of R105 is a power end, and the other end links to each other with the end of electronic lock K4, the other end ground connection of electronic lock K4, the common port of R105 and electronic lock links to each other with the input terminal of the input/output terminal of single-chip microcomputer (1), and C55 is connected in parallel between the two ends of K4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237096 CN2302485Y (en) | 1997-09-17 | 1997-09-17 | Computer controller for refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237096 CN2302485Y (en) | 1997-09-17 | 1997-09-17 | Computer controller for refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2302485Y true CN2302485Y (en) | 1998-12-30 |
Family
ID=33947824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97237096 Expired - Fee Related CN2302485Y (en) | 1997-09-17 | 1997-09-17 | Computer controller for refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2302485Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429467C (en) * | 2004-05-21 | 2008-10-29 | 株式会社不二工机 | Temperature controller for show cabinet |
| CN105157341A (en) * | 2013-09-24 | 2015-12-16 | 合肥美菱股份有限公司 | Device for detecting refrigeration faults of refrigerator |
| CN110908412A (en) * | 2019-12-11 | 2020-03-24 | 重庆泰吉电子有限公司 | Intelligent drying and dehumidifying work system and method thereof |
-
1997
- 1997-09-17 CN CN 97237096 patent/CN2302485Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100429467C (en) * | 2004-05-21 | 2008-10-29 | 株式会社不二工机 | Temperature controller for show cabinet |
| CN105157341A (en) * | 2013-09-24 | 2015-12-16 | 合肥美菱股份有限公司 | Device for detecting refrigeration faults of refrigerator |
| CN105157340A (en) * | 2013-09-24 | 2015-12-16 | 合肥美菱股份有限公司 | Device for detecting refrigeration faults of refrigerator |
| CN105157340B (en) * | 2013-09-24 | 2017-05-17 | 合肥美菱股份有限公司 | Device for detecting refrigeration faults of refrigerator |
| CN105157341B (en) * | 2013-09-24 | 2017-05-17 | 合肥美菱股份有限公司 | Device for detecting refrigeration faults of refrigerator |
| CN110908412A (en) * | 2019-12-11 | 2020-03-24 | 重庆泰吉电子有限公司 | Intelligent drying and dehumidifying work system and method thereof |
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