CN2044337U - Automatic refrigerator protector - Google Patents
Automatic refrigerator protector Download PDFInfo
- Publication number
- CN2044337U CN2044337U CN 89201548 CN89201548U CN2044337U CN 2044337 U CN2044337 U CN 2044337U CN 89201548 CN89201548 CN 89201548 CN 89201548 U CN89201548 U CN 89201548U CN 2044337 U CN2044337 U CN 2044337U
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- control circuit
- join
- resistance
- protector
- control
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Abstract
The utility model discloses an automatic refrigerator protector, comprising a casing, a power supply wire with a plug and a control circuit board. The utility model is characterized in that the on-off control circuit of the control circuit board is mainly composed of an integrated circuit NE555, a dry reed pipe relay, a plurality of resistances and capacitances and a triode, and an alternate-current power supply control circuit uses a silicon controlled rectifier as a contactless control switch. The utility model has the advantages of simple circuit, small size, low cost, low power consumption, high reliability and easy manufacture and regulation. As long as silicon controlled rectifiers with different powers are replaced, the protector with the same structure can be used for protecting refrigerators with different powers or other domestic appliances.
Description
The utility model belongs to the security appliance protective device, is particularly useful for the safeguard protection of refrigerator.
Known have the communication power supply momentary power failure and communication power supply is under-voltage, the ON-OFF control circuit in the control circuit board in the refrigerator protector of overvoltage protection effect adopts discrete component more or adopts complicated circuit; adopt such structure; make that the protector volume is big; cost is higher, transfers in the production and surveys inconvenience.The AC power control switch adopts the electromagnetic type relay control switch that the contact is arranged again; the Control current of the feasible relay of flowing through is big; spring contact easily produces electric spark when break-make simultaneously; the corrosion contact; influence the life-span and the reliability of interchange control switch, and then influenced the life-span and the reliability of refrigerator protector.
The purpose of this utility model is; what the low contactless interchange control switch of employing of the little cost of a kind of volume was provided maintains communication power supply momentary power failure and communication power supply overvoltage, the refrigerator protector of under-voltage protection function.
The utility model be achieved in that it by casing, the band plug power line and control circuit board form, this is identical with known protector macrostructure.The utility model key is transformed the part-structure in the known control circuit board.Main modification measures, the one, be equipped with a small amount of components and parts with an integrated circuit NE555 and a reed switch relay J and constitute ON-OFF control circuit.The 2nd, adopt bidirectional triode thyristor to make contactless interchange control switch, be equipped with and trigger branch road formation AC power control circuit.
With the integrated circuit is the main ON-OFF control circuit that constitutes, and makes circuit simple, and structural volume is little, little power consumption.Replace having the electromagnetic type relay of contact with reed switch relay, can use less Control current, reduce the circuit energy consumption.Do to exchange control switch with controllable silicon, since contactless, so switch life is long.Control current because of the SCR control grid of flowing through is little again, and the control contact is located in the vacuum tube, when so reed switch relay is connected, can not produce electric spark, even accidental have, spark also is limited in the vacuum tube, and other device of entail dangers to has not improved switch motion reliability and coefficient safe in utilization simultaneously yet.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the control circuit board basic circuit diagram.
Fig. 2 is a pcb map.
In Fig. 1, the dotted line left side constitutes voltage comparator circuit.By the branch road that diode D5 and resistance R 3 constitute comparative voltage is introduced the comparative voltage circuit.When input supply voltage exceeds the normal high-voltage value of regulation, through IC1 (LM324 constitutes by integrated circuit) relatively after, at the controlled high potential of output terminals A.In like manner, when input supply voltage is lower than the normal low voltage value of regulation, through IC2 (also constituting) by integrated circuit LM324 relatively after, at the controlled high potential of output terminals A.As long as change the high and low magnitude of voltage that variable resistor W1 or W2 value just can change control.Resistance R 2 limits the operating current of voltage-stabiliser tube DW2.C2 is a filter capacitor, and resistance R 3, R4 cooperate an amount of comparative voltage of introducing.D6, D7 are that polarity limits diode, improve control reliability.
Constitute under-voltage overvoltage indicating circuit by resistance R 5 and LED 2, AC supply voltage is under-voltage or during overvoltage, output terminals A point is a high potential, and LED2 is bright, supply voltage just often, the A point is an electronegative potential, LED2 goes out.
By resistance R 6, R7, capacitor C 3, triode BG, integrated circuit (IC) 3 (with 555) and reed switch relay J form ON-OFF control circuit.R6 one end and voltage comparator circuit output terminals A are joined, the other end of R6 and the base stage of BG are joined, the emitter of BG and bus B join, the end of BG collector electrode and R7, C3 is connected on the binding post 2,6 of IC3, the terminal 4,8 of IC3 and the other end of R7 all are attempted by on the bus D, terminal 1 and the bus B of IC3 join, control coil one end of the lead-out terminal 3 of IC3 and J joins, and the other end of the control coil of J and bus D join.
When input ac power under-voltage or overvoltage, the A point is a high potential, the BG conducting, C3 discharges rapidly by BG, the terminal 2,6 of IC3 is an electronegative potential, and terminal 3 is a high potential, and no current flows through in the relay J control coil, the contact K of J disconnects, and sends an alternating-current switch and cuts off control signal.When the input AC supply voltage just often, A point is an electronegative potential, under-voltage or overvoltage indicator light LED2 goes out, the while BG end.If behind the communication power supply momentary power failure, restore electricity again, this moment, the A point was that electronegative potential, BG are off-state, circuit gives capacitor C 3 chargings through R7, through behind the certain hour, when the last voltage of C3 is charged to certain value, the terminal 3 of IC3 promptly presents electronegative potential, voltage normally indicates the indicator light LED1 in the branch road (being made of LED 1 and resistance R 8) bright, there is electric current to flow through in the control coil of J, the control contact K of J connects, and then control exchanges the control switch connection.The switch motion delay time of this protector is by the numerical value decision of resistance R 7 and capacitor C 3.
The AC power control circuit is by the control contact K that triggers resistance R 9, reed switch relay J, controllable silicon SCR, and silicon controlled rectifier protecting branch road (being made up of capacitor C 4 and resistance R 10) is formed.Contact K and the R9 of J are in series, the end of R9 and the grid of controllable silicon SCR join, the end of the end of the contact K of J and the anode of SCR, C4 and supply socket (CZ) terminal L join, and the end of the negative electrode of SCR and R10 joins also and ac power input end L ' joins.By the silicon controlled rectifier protecting branch road that capacitor C 4 and resistance R 10 are formed, too high in order to protection because of the electromotive force that the compressor winding causes, cause controllable silicon to puncture.Silicon controlled trigger current value is controlled by R9.The break-make of contact K has been controlled the break-make of reverse-blocking tetrode thyristor, thereby controls the break-make of refrigerator power circuit.
Resistance R 0 constitutes the resistance-capacitance depressurization device with capacitor C 0, and diode D1～D4 constitutes bridge rectifier, and resistance R 1, capacitor C 1 and voltage-stabiliser tube DW1 constitute the dc low-voltage voltage stabilizing circuit.
During producing, complete machine only needs to adjust variable resistor W1 and W21 setting protection voltage range.On casing, offer two inspection holes, the working condition of, an overvoltage indicator light under-voltage in order to observe, another is in order to observe normal voltage indicator light working condition, and two indicator lights use different colours so that difference.All components and parts (containing supply socket) weld, are assemblied on the printed circuit board shown in Figure 2, promptly constitute control circuit board.Fig. 2 drawing ratio is 2: 1.The casing of protector adopts its non-plug end of power line of commercially available standard electric source capsule (7 * 7 * 5 cubic centimetres) band plug and L ', N among Fig. 1 end to join the only about 13 yuan/platform of complete machine fee of material.Change the controllable silicon of different capacity, need not to change circuit structure, promptly can be used for protecting the refrigerator of different capacity.This protector can also be used for protecting air conditioner or other resistor-type load household electrical appliance.
The constituent element device data that protector adopts is as follows:
Resistance:
R0：?470K R1： 10K
R2：?470Ω R3： 240K
R4：?12K R5： 1K
R6：?5.6K R7： 1.2M
R8：?1K R9： 100Ω
R10：100Ω
Variable resistor
W1：6.8K
W2：6.8K
Electric capacity:
C1：470μ/16V
C2：10μ/16V
C3：220μ/16V
C0：0.56μ/400V
Voltage-stabiliser tube
DW1：2CW59
DW2：2CW55
Diode:
D1～D4 IN4004 D5：IN4005
D6、D7 IN4001
Triode: 3DG6
Integrated circuit:
IC1、IC2：LM324
IC3 ：NE555
Light-emitting diode:
The LED1 green
The LED2 redness
Dry-reed relay: JAG (12V/1K)
Claims (5)
1, a kind of full-automatic refrigerator protector; it is made up of the power line and the control circuit board of casing, band plug; resistance-capacitance depressurization circuit, rectification circuit, voltage stabilizing circuit and voltage comparator circuit are arranged in the control circuit board; it is characterized in that; the ON-OFF control circuit that includes an integrated circuit NE555 and a reed switch relay J is arranged in the control circuit board, contain the AC power control circuit that adopts bidirectional triode thyristor to make contactless interchange control switch.
2, according to the protector of claim 1 defined, it is characterized in that the ON-OFF control circuit in its control circuit board is made up of resistance R 6, R7, capacitor C 3, triode BG, integrated circuit (IC) 3 (using NE555) and reed switch relay J; R6 one end and voltage comparator circuit lead-out terminal A join, the other end of R6 and the base stage of BG are joined, the emitter of BG and bus B join, BG collector electrode and R7, the end of C3 is connected to the binding post 2 of IC3, on 6, the terminal 4 of IC3,8 and the other end of R7 all be attempted by on the bus D, terminal 1 and the bus B of IC3 join, control coil one end of the lead-out terminal 3 of IC3 and J joins, and the other end of the control coil of J and bus D join.
3, according to the protector of claim 1 defined, it is characterized in that, AC power control circuit in its control circuit board is by triggering resistance R 9, the control contact K of reed switch relay J, controllable silicon SCR, capacitor C 4 and resistance R 10 compositions; Contact K and the R9 of J are in series, the end of R9 and the grid of controllable silicon SCR join, the end of the end of the contact K of J and the anode of SCR, C4 and supply socket terminal L mutually and connect, the end of the negative electrode of SCR and R10 join and and ac power input end L ' join.
4, according to the protector of claim 1 defined; it is characterized in that two terminals of the control coil of reed switch relay J and normally indicate branch road to be in parallel by LED 1 and resistance R 8 voltage that constitutes that is in series.
5, according to the protector of claim 1 defined; it is characterized in that; voltage comparator circuit output terminals A and joined by resistance R 5 and LED 2 resistance terminal under-voltage, overvoltage indication branch road that constitutes that is in series, an end and the bus B of LED 2 join.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89201548 CN2044337U (en) | 1989-02-13 | 1989-02-13 | Automatic refrigerator protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89201548 CN2044337U (en) | 1989-02-13 | 1989-02-13 | Automatic refrigerator protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2044337U true CN2044337U (en) | 1989-09-13 |
Family
ID=4859435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89201548 Withdrawn CN2044337U (en) | 1989-02-13 | 1989-02-13 | Automatic refrigerator protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2044337U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786355A (en) * | 2017-03-06 | 2017-05-31 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of intelligent grid protector based on OR gate |
| CN106849003A (en) * | 2017-03-06 | 2017-06-13 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of AC network safety electricity consumption protector |
-
1989
- 1989-02-13 CN CN 89201548 patent/CN2044337U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786355A (en) * | 2017-03-06 | 2017-05-31 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of intelligent grid protector based on OR gate |
| CN106849003A (en) * | 2017-03-06 | 2017-06-13 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of AC network safety electricity consumption protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |