CN209913480U

CN209913480U - Energy-saving refrigerator time delay protector circuit

Info

Publication number: CN209913480U
Application number: CN201920355320.7U
Authority: CN
Inventors: 翁国聪
Original assignee: Foshan Taixin Electronics Co Ltd
Current assignee: Foshan Taixin Electronics Co Ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-01-07
Anticipated expiration: 2029-03-20

Abstract

The utility model discloses an energy-saving refrigerator time-delay protector circuit, which comprises a main circuit for controlling the power supply of a refrigerator socket and a time-delay circuit for playing the automatic time-delay protection when the refrigerator is restored to be powered; a relay normally open contact in the main circuit controls the time delay circuit to automatically break away from power supply after the work is finished; the main circuit provides a working power supply for the delay circuit; the time delay circuit carries out time delay control on the main circuit, and the normal power supply is automatically recovered after the control is finished; the utility model discloses a time delay circuit can control the refrigerator socket in the main circuit and play the effect of automatic time delay protection when resumeing the power supply, and the relay normally open contact in the main circuit can control the time delay circuit automatically break away from the power supply after work simultaneously, reduces the work part of protector, plays the purpose of saving the electric energy loss; the utility model discloses utilize the two group contacts of same relay not only to realize time delay protection but also practice thrift the energy consumption, and circuit structure retrencies, need not artificial intervention, and it is convenient to use, has better use value.

Description

Energy-saving refrigerator time delay protector circuit

Technical Field

The utility model relates to refrigerator protection technical field especially involves an energy-saving refrigerator time delay protector circuit.

Background

The refrigerator time delay protector is used for a starting time delay protection circuit after power failure, and is widely applied. Although the current refrigerator time delay protector plays a role of time delay protection, the protector is always in a working state when being electrified and continuously consumes electric energy, so that the prior art has defects and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides an energy-saving refrigerator time delay protector circuit, the above-mentioned problem of solution.

In order to solve the above problem, the utility model provides a technical scheme as follows:

a time delay protector circuit of an energy-saving refrigerator comprises a main circuit for controlling the power supply of a refrigerator socket and a time delay circuit for automatically delaying and protecting the time when the refrigerator is restored to be powered; a relay normally open contact in the main circuit controls the time delay circuit to automatically break away from power supply after the work is finished; the main circuit provides a working power supply for the delay circuit; the time delay circuit carries out time delay control on the main circuit and automatically restores normal power supply after the control is finished.

Compared with the prior art, the utility model has the advantages that by adopting the scheme, the time delay circuit can control the refrigerator socket in the main circuit to play the role of automatic time delay protection when power supply is recovered, and meanwhile, the relay normally open contact in the main circuit can control the time delay circuit to automatically break away from power supply after the work is finished, so that the working part of the protector is reduced, and the purpose of saving electric energy loss is achieved; the utility model discloses utilize the two group contacts of same relay not only to realize time delay protection but also practice thrift the energy consumption, and circuit structure retrencies, need not artificial intervention, and it is convenient to use, has better use value.

Drawings

For a clearer explanation of the embodiments or technical solutions in the prior art, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a circuit schematic diagram of the energy-saving refrigerator time delay protector circuit of the utility model.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The use of the terms "fixed," "integrally formed," "left," "right," and the like in this specification is for illustrative purposes only, and elements having similar structures are designated by the same reference numerals in the figures.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, an embodiment of the present invention is:

The main circuit comprises resistors R1 and R4, a capacitor C1, diodes VD1 and VD3, a voltage regulator tube DW, a relay K and a socket XS for the refrigerator;

the L end of the commercial power is respectively connected with the first end of the resistor R1, the first end of the capacitor C1 and the first end of the socket XS; the anode of the diode VD1 is respectively connected with the cathode of the voltage regulator tube DW, the second end of the resistor R1 and the second end of the capacitor C1; the cathode of the diode VD1 is respectively connected with the first end of the resistor R4 and the first end of the capacitor C4; the cathode of the diode VD3 is respectively connected with the first end of the relay K, the second end of the resistor R4 and the second end of the capacitor C4; the second end of the socket XS is connected with the first end of the normally closed contact K1-1 of the relay K; the N end of the commercial power is respectively connected with the second end of the normally closed contact K1-1 of the relay K, the anode of the voltage-stabilizing tube DW and the second end of the relay K;

the diode VD1 is an IN4007 type silicon rectifying diode; the diode VD3 is an IN4001 type diode; the relay K is a JQX-4F type DC12V relay.

The delay circuit comprises resistors R2-R3, capacitors C2-C3, a diode VD2 and an integrated circuit IC;

the first end of a normally open contact K1-2 of the relay K is connected with the first end of a resistor R4; a second end of a normally open contact K1-2 of the relay K is respectively connected with a first end of a resistor R2-R3, a first end of a capacitor C2, a negative electrode of a diode VD2 and the 4 th pin and the 8 th pin of the integrated circuit IC; a first end of the capacitor C3 is respectively connected with a second end of the resistor R3, the anode of the diode VD2 and the 2 nd and 6 th pins of the integrated circuit IC; the 3 rd pin of the integrated circuit IC is connected with the anode of a diode VD 3; the N end of the commercial power is respectively connected with the second end of the resistor R2, the second ends of the capacitors C2-C3 and the 1 st pin of the integrated circuit IC;

the diode VD2 is an IN4148 type diode; the integrated circuit IC is a 555 type time base integrated circuit.

The utility model discloses a theory of operation:

when the commercial power is suddenly supplied with power, 220V alternating current is reduced by C1, VD1 is rectified, and 12V half-wave direct current is obtained after DW voltage stabilization. The pulsating voltage charges a capacitor C4 through a coil of a relay K, the charging current of the C4 enables the K to be attracted immediately, the K1-1 is disconnected, the socket XS loses power, and the refrigerator cannot be electrified immediately. Meanwhile, K1-2 is closed, and the ripple voltage is filtered by C2 to electrify the time base delay control circuit. Initially, because the voltage of C3 can not be suddenly changed, pins II and III of the IC are low level, pin III outputs high level, and VD3 takes over the charging current of C4 to keep K attracting continuously. The circuit enters a time delay state, after T =1.1R3C3 time, the voltage on the C3 is charged to 2/3Vcc, the pin III of the IC is turned over to be low level, K is temporarily charged and attracted through the C4, then the K is released, K1-1 is closed, the refrigerator is powered on, meanwhile, K1-2 is disconnected, and the time delay circuit is powered off. After K1-2 is disconnected, VD2 and R2 provide a C3 discharge path to ensure accurate next time delay, and R4 is a C4 discharge path to ensure that K can rapidly act when a sudden call is received after power failure.

The IC selects various 555 time-base circuits; k can be a 12V relay with a movable contact and a movable contact, such as JQX-4F; the capacity of C4 can be selected according to the coil of K, should not be too big to guarantee that K reliably attracts when charging.

It should be noted that the above technical features are continuously combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; moreover, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims

1. A time delay protector circuit of an energy-saving refrigerator is characterized by comprising a main circuit for controlling the power supply of a refrigerator socket and a time delay circuit for automatically delaying and protecting the time when the refrigerator is restored to be powered; a relay normally open contact in the main circuit controls the time delay circuit to automatically break away from power supply after the work is finished; the main circuit provides a working power supply for the delay circuit; the time delay circuit carries out time delay control on the main circuit, and the normal power supply is automatically recovered after the control is finished; the main circuit comprises resistors R1 and R4, a capacitor C1, diodes VD1 and VD3, a voltage regulator tube DW, a relay K and a socket XS for the refrigerator; the L end of the commercial power is respectively connected with the first end of the resistor R1, the first end of the capacitor C1 and the first end of the socket XS; the anode of the diode VD1 is respectively connected with the cathode of the voltage regulator tube DW, the second end of the resistor R1 and the second end of the capacitor C1; the cathode of the diode VD1 is respectively connected with the first end of the resistor R4 and the first end of the capacitor C4; the cathode of the diode VD3 is respectively connected with the first end of the relay K, the second end of the resistor R4 and the second end of the capacitor C4; the second end of the socket XS is connected with the first end of the normally closed contact K1-1 of the relay K; the N end of the commercial power is respectively connected with the second end of the normally closed contact K1-1 of the relay K, the anode of the voltage-stabilizing tube DW and the second end of the relay K; the delay circuit comprises resistors R2-R3, capacitors C2-C3, a diode VD2 and an integrated circuit IC; the first end of a normally open contact K1-2 of the relay K is connected with the first end of a resistor R4; a second end of a normally open contact K1-2 of the relay K is respectively connected with a first end of a resistor R2-R3, a first end of a capacitor C2, a negative electrode of a diode VD2 and the 4 th pin and the 8 th pin of the integrated circuit IC; a first end of the capacitor C3 is respectively connected with a second end of the resistor R3, the anode of the diode VD2 and the 2 nd and 6 th pins of the integrated circuit IC; the 3 rd pin of the integrated circuit IC is connected with the anode of a diode VD 3; the N end of the commercial power is respectively connected with the second end of the resistor R2, the second ends of the capacitors C2-C3 and the 1 st pin of the integrated circuit IC.

2. The energy-saving refrigerator time-delay protector circuit as claimed IN claim 1, wherein the diode VD1 is a type IN4007 silicon rectifier diode.

3. The energy-saving refrigerator time-delay protector circuit as claimed IN claim 1, wherein the diode VD3 is an IN4001 diode.

4. The energy-saving refrigerator time delay protector circuit as claimed in claim 1, wherein the relay K is a JQX-4F type DC12V relay.

5. The energy-saving refrigerator time-delay protector circuit as claimed IN claim 1, wherein the diode VD2 is an IN4148 diode.

6. The energy-saving refrigerator time delay protector circuit as claimed in claim 1, wherein the integrated circuit IC is a 555 type time base integrated circuit.