CN2037457U - Multifunction electronic controller of frigidarium - Google Patents

Abstract

The utility model discloses a multifunction electronic controller of a frigidarium, and has the functions of automatic differential type temperature control, temperature display, semiautomatical defrosting and open-door alarm. The multifunction electronic controller of a frigidarium is characterized in that adopting a luminous tube array carries out the temperature display; adopting a T-shaped trigger and a Not-Or gate carry out the semi-automatical defrosting; adopting a hall element alarms the untight door. The multifunction electronic controller of a frigidarium can be used in the equipment refrigerated by a compressor such as the frigidarium, freezers, etc., has the advantages of various functions, accurate temperature control, regulatable differential control, long service life, energy saving, convenient maintenance, simple operation, open-door alarm, direct display of the refrigerator temperature and good decorative effect, increases the limpidity for the user, and reduces the cost.

Description

Multifunction electronic controller of frigidarium

The utility model relates to a kind of electronic type multifunctional refrigerator controller.

Commercially available refrigerator and refrigerating equipment adopts pressure type temperature control and defroster mostly at present.Its basic structure is to utilize the inflatable capillary to make temperature detector, make bellows or diaphragm pressure gauge produce displacement because of variations in temperature, in order to control the fast jumping movable contact of mechanical thermostat, control stopping or rotating of compressor, reach the purpose of control temperature and semiautomatic defrosting.Although this traditional method principle is simple, following shortcoming is arranged: 1, temperature-controlled precision is low; 2, can not be at the freezing or temperature of refrigerating chamber of the outside directly demonstration of refrigerator; To open chamber door when 3, regulating temperature or defrosting, not only inconvenience but also take; 4, the critical component of pressure type thermostat (bellows) is mostly wanted dependence on import; Maintenance difficult when 5, breaking down; 6, there is not door to close the tight not warning function of (promptly spacious door).

Task of the present utility model is to overcome the existing shortcoming of above-mentioned refrigerator, adopts better simply circuit, makes a kind of electronic type multifunctional refrigerator controller, it has (a whole set of controller only needs about 40 yuan) with low cost, and is easy to maintenance, simple to operate, multiple functional, the reliability advantages of higher.

The utility model can arbitrarily preset cold house's temperature as required, and the scope of preset temperature is adjustable, and preset temperature is designated as omnidistance continuously adjustable slidingtype linearity scale.Refrigerator sample point actual temperature is designated as several light emitting diodes, the actual temp interval that each luminous tube is corresponding certain, and (T → T+ △ T) value, the temperature display precision is better than 1/2 △ T, and △ T can regulate arbitrarily.Differential type is adopted in the work of compressor, and its work frequency is by giving the differential voltage value △ V(△ V=V that sets earlier ₁-V ₂) control, and △ V also can be adjustable in suitable scope as required.Defrosting is pressed primary key by the control of ad hoc membrane keyboard, and then compressor quits work, and when refrigerator temperature went back up to certain giving and establishes temperature, control gate was opened, and compressor recovers operate as normal again.Refrigerator opens door alarm Hall element alarm indication.It can be closed in refrigerator doors the function that can report to the police when tight slightly.The installation of a whole set of controller does not take storage thing volume in the case.

Fig. 1 is an electrical schematic diagram of the present utility model.

Fig. 2,3,4 is the mounting structure schematic diagram of the utility model on refrigerator.

Among Fig. 1, W1, R2, W2 form temperature and give circuits, and DZ1 is the Zener diode of its temperature-compensating, are used to improve give the precision of putting temperature.W3, R4, D1, D2 form the differential temperature of compressor operating and give circuits.A1, A2 are operational amplifier.A1 is as follower.A2 is as differential amplifier.R6, W4, R7 form its reference voltage regulating circuit.D3 is a temperature sensor, is used for the temperature of responsive sample point.A3, A4, A5, A6, A7, A8, A9, A10, A11, A12 are voltage comparator, wherein A5～A12 and resistance R 10, R11, R12, R13, R14, R15, R16 and light emitting diode D4, D5, D6, D7, D8, D9, D10, D11 constitute the temperature survey display circuit, D4～D11 indication refrigerator actual temperature.B1, B2 are double D trigger, and wherein B1 is as the R-S trigger, and B2 is as toggle flip-flop.E1, E2 are two nor gates.D12, D13, D14 are light emitting diode.D12, D14 are used to indicate compressor to stop and work.D13 is used to indicate defrost.J is a relay line bag.CT1 is the bidirectional triode thyristor non-contact switch.T1 is a transformer, plays the isolated buck effect, and P1, P2 are fuse.WZ is the three-terminal voltage-stabilizing power supply, and DZ2 is a Zener diode.Ha is a Hall element, and LB is that buzzer (or piezoelectric speaker), D15 are luminous tube, and the indication refrigerator doors is not closed completely.

Among Fig. 1, refrigerator cold house temperature sampling is finished by temperature sensor D3, and its principle is that the forward voltage drop according to the semiconductor PN of D3 presents good negative wire characteristic in-55 ℃～+ 125 ℃ scopes.Sample point temperature inversion one-tenth is become the voltage VD3 of negative wire with temperature, send into the anode of differential amplifier A2.Reference voltage V a is the partial pressure value of Vcc on W4, R7.Va is sent into the negative terminal of A2, and it and VD3 comparison are after A2 amplifies output and temperature line relationship and slope for negative output voltage V 2, if the sample point temperature is high more, then V2 is just more little.V2 sends into the anode of A4 and A3, A5, A6, A7, A8 respectively ... the negative terminal of A12.In use, regulate W1 to the required temperature position of putting of giving, (W1 adopts the slidingtype electric position, voltage on it is promptly indicated the value of putting of giving of refrigerator temperature), then a fixed voltage V1 is sent into the anode of A3, and V1 also makes its output end voltage also be V1 by follower A1, thereby, deliver to the voltage V3＜V1 of A4 negative terminal, when V1＜V2, the A3 output low level, send into the RD end of B1, A4 exports high level, sends into the SD end of B1, and then the Q output of B1 is a high level, enter nor gate E1, block E1, the base stage that makes it to add to BG1 is a low level, and the BG1 pipe ends, relay line bag J dead electricity (or CT1 outage), compressor quit work (compressor is by relay J or bidirectional triode thyristor CT1 control).The luminous compressor that shows of luminous tube D12 conducting is not worked, and refrigerator is in keeping warm mode.After this, the probe temperature of D3 will go up because of environment leaks heat, V2 is descended when V3＜V2＜V1, A3, A4 output all is high level, make B1 output Q end level state constant (being that Q still is high level), nor gate E1 still is blocked, and refrigerator still is in keeping warm mode.Be the difference of utilizing V1-V2 this period, and by A3, A4, it is constant to keep the B1 previous status, and the duty of compressor is kept.If V1-V2 difference big more (can when debug circuit, adjust W3 and change the V1-V2 value); then keep the constant time of compressor operating state long more (during design; make it greater than 5 minutes); at this moment; A3, A4, and the circuit formed of B1 can regard delay circuit as; delay time is regulated as required, and its effect is in order to reduce the work frequency of compressor, the not frequent feed of protection compressor.When temperature recovery during to V2＜V3, A4 is output as low level, and A3 is output as high level, makes the B1 upset.Output Q end becomes " 0 ", sends into (when temperature control, another input e1 of E1 is always low level) among the E1, makes E1 output become " 1 " from " 0 ".The BG1 conducting, relay line bag J gets electric (or CT1 conducting), and compressor operating is freezed, and the luminous demonstration of luminous tube D14, the indication compressor operating.After this, the temperature of sample point descends because of compressor cooling, and V2 increases, and has only when V2＞V1, and compressor just quits work, and refrigerator is incubated again.And so forth, realize temperature automatically controlled function.

When the needs displays temperature, single-pole single-throw switch (SPST) K1 closes, make V2 and R10, R11, R12, R13, R14, R15, R16, W6 etc. component voltage V10, V11, V12, V13, V14, V15, V16, V17 compare one by one, if comparator relatively is the output high level, then that the luminous tube conducting on the same branch road is luminous, show the refrigerator actual temperature that records.The corresponding minimum fiducial temperature (as-24 ℃) of voltage V10, the highest fiducial temperature of V17 correspondence (as+12 ℃).Regulate W6 and be in order the value of component voltage V10, V11, V12, V13, V14, V15, V16 such as to adjust, to satisfy certain temperature measurement range and temperature measurement accuracy.

The utility model is by T trigger B2 and the also available NAND gate of nor gate E2() form semi-automatic defrost device, when the needs defrost, meet membrane keyboard K2, make SD end input one low level signal in blink of B2, the Q end of B2 is output as " 0 ".Send into nor gate E2, another input e2 signal of E2 is provided by A12 output.At this moment, A12 output low level (because only be lower than the highest fiducial temperature at refrigerator temperature, promptly V2＜V17 just needs defrost).Then nor gate E2 output high level is sent into E1, and E1 is blocked, and BG1 ends, and compressor quits work, and refrigerator temperature gos up, natural defrost (or connecting the defrost electric furnace heating wire).Treat that defrost finishes, when refrigerator temperature went back up to V2＜V17, A12 output became " 1 " by " 0 ", sends into the clock CP end of B2, make the B2 upset, output Q is " 1 ", blocks E2, open E1, defrost process just stops automatically, and compressor returns to the temperature control state before the defrost.When E2 output high level, the D13 conducting is luminous, indication defrost duty, and when the E2 output low level, D13 is not by luminous, and the indication defrost stops.In normal operation, the e1 perseverance is a low level, so the setting of defrost circuit does not influence the normal duty of refrigerator.Whole defrost process only need click membrane keyboard K2 and get final product, and all the other processes are control automatically all.

The spacious door alarm of refrigerator of the present utility model is made up of Hall element Ha and light emitting diode D15, buzzer (or piezoelectric speaker) LB.When a fritter magnet steel CG is close to hall ic sheet (select for use and be output as low level hall ic sheet under the normality) when Ha is last, the open-collector output Vo output of Ha equals VCC, it is not luminous that D15 is ended, when magnet steel CG leaves Ha, the Ha output end vo becomes low level, make the D15 conducting luminous, the indication refrigerator doors is not closed completely, and buzzer LB sends warning.

In Fig. 2, Hall circuit Ha is placed in the left side of refrigerator body front doorjamb, its magnet steel CG be installed in the corresponding chamber door of Ha on, when closing chamber door tight, magnet steel is close on the Ha, and when opening chamber door or sealing up a door when tight, magnet steel leaves Ha, then loudspeaker LB and luminous tube D15 alarm indication.In Fig. 3, electronic circuit of the present utility model all is installed in the hollow cavity in refrigerator top cover plate dead ahead, M tumbles in refrigerator temperature display board (its light emitting diode number changeable) and the K switch of being made up of light emitting diode D4～D11 1 thereof on surface, refrigerator top cover plate dead ahead, defrost key K2 and indication D13 thereof.Compressor operating indication D14 and shut down indication D12, spacious door alarm indication D15(or buzzer LB), and give by the temperature that slidingtype potentiometer W1 constitutes and to put indication.Temperature sensor D ₃Place evaporimeter N top nearby or the evaporimeter N side back of the body nearby, if when refrigerating chamber also needs direct displays temperature, a temperature sensor D3 can be installed equally in refrigerating chamber.Transformer T1 is installed in by the compressor of the casing back lower place, during as if employing relay J control compressor, also is installed on this (as Fig. 4).

It is accurate to the utlity model has temperature control, and Differential Control is adjustable, directly shows refrigerator temperature, increases the user transparent sense, and spacious door alarm reduces the compressor opening times, and with low cost, prolongs the refrigerator life-span, and saves energy consumption is easy to maintenance. Simple to operate, decorate the advantages such as effective.

Claims (4)

1, a kind of electronic type multifunctional refrigerator controller comprises temperature sensor, and temperature is given circuits, and differential temperature is provided with circuit.Temperature controller, display, defrost control circuit, spacious door alarm circuit.It is characterized in that having one by toggle flip-flop B ₂With nor gate E ₂The semi-automatic defrost device that (inclusive NAND door) formed; One by Hall element Ha and light emitting diode D ₁₅, the spacious door alarm circuit of refrigerator formed of buzzer (or piezoelectric speaker) LB; One by comparator A ₅～A ₁₂With light emitting diode D4～D ₁₁The temperature display circuit of forming.

2, electronic type multifunctional refrigerator controller according to claim 1 is characterized in that the toggle flip-flop B in the defrosting device ₂SD hold an external manual palpation key K ₂, and, its Q end output AND E ₂An input link to each other; Its clock signal C p and nor gate E ₂Another input e ₂All with comparator A ₁₂Output links to each other.

3, electronic type multifunctional refrigerator controller according to claim 1 is characterized in that in the left side of the doorjamb in refrigerator body front hall ic Ha being installed, and with the corresponding chamber door of Hall circuit Ha on a fritter magnet steel CG has been installed.

4, according to claim 1,2,3 described electronic type multifunctional refrigerator controllers, it is characterized in that in the hollow cavity in refrigerator top cover plate dead ahead, installing the electronic circuit board of refrigerator controller, M tumbles in by light emitting diode D on surface, refrigerator top cover plate dead ahead ₄-D ₁₁Refrigerator temperature display board (its light emitting diode number changeable) and the K switch thereof formed ₁, defrost key K ₂And indication D ₁₃, compressor operating indication D ₁₄And shut down and indicate D ₁₂, spacious door alarm indication D ₁₅(or buzzer LB), and by slidingtype potentiometer W ₁The temperature that constitutes is given and is put indication.

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