CN203883447U

CN203883447U - Power-on automatic switch-on device for alternating-current external line after power failure

Info

Publication number: CN203883447U
Application number: CN201420170538.2U
Authority: CN
Inventors: 周云侠
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-10
Filing date: 2014-04-10
Publication date: 2014-10-15
Anticipated expiration: 2024-04-10

Abstract

The utility model discloses a power-on automatic switch-on device for an alternating-current external line after a power failure. The power-on automatic switch-on device is characterized by comprising a 220V alternating-current power source, an air switch K1, a time relay SJ coil loop, an intermediate relay ZJ coil loop and a motor-operated switch DW16. The power failure occurs suddenly when air conditioners, freezers and other refrigeration devices operate normally, the power is restored suddenly after dozens of seconds, the air conditioners, the freezers and the other refrigeration devices are damaged seriously, and due to the fact that the voltages of refrigeration systems of the refrigeration devices are not balanced, the situation that the rotation of a compressor is blocked, the compressor is burnt out, and even fire risks exist can occur easily. The device has the main function that when the alternating-current external line is powered off and powered on again, the motor-operated switch is started in a delayed mode according to set time to carry out automatic switch-on, and the aim of unattended automatic switch-on and power supply is achieved; the device plays a role only when the alternating-current external line is powered off. The device can be widely applied to the air conditioners, freezers and the other refrigeration devices in small markets and restaurants, and has the advantages of being low in manufacturing cost, convenient to mount and safe and reliable in operating.

Description

Power-on automatic switching on device after alternating current outside line has a power failure

Technical field

The utility model belongs to electrical technology field, relates to the rear power-on automatic switching on device of a kind of alternating current outside line power failure.

Background technology

Some electric equipment, as: the refrigeration plants such as air-conditioning, refrigerator-freezer prominent chance in the time normally moving has a power failure, and sent a telegram here suddenly after tens seconds, this is very harmful to the refrigeration plant such as air-conditioning, refrigerator-freezer, likely because the refrigerating system pressure of refrigeration plant not yet reaches balance, very easily cause compressor stall and burn out, even burying disaster hidden-trouble.Be necessary so to design the have a power failure electronic installation of the enough automatic time delay power supplies of electric energy afterwards of a kind of outside line.

After alternating current outside line has a power failure, the major function of power-on automatic switching on device is: after alternating current outside line has a power failure, while incoming call again, press setting-up time delayed startup motor switch automatic closing, complete unattended operation automatic closing power transmission, this device only has a power failure and just works in alternating current outside line.It can extensively use on the refrigeration plant such as air-conditioning, refrigerator-freezer in Mini Supermarkets, restaurant, is characterized in that cost of manufacture is low, easy for installation, safe and reliable to operation.

Power-on automatic switching on device related relevant technologies content in implementation process after below describing alternating current outside line described in the utility model in detail and having a power failure.

Utility model content

Goal of the invention and beneficial effect: some electric equipment, as: the refrigeration plants such as air-conditioning, refrigerator-freezer prominent chance in the time normally moving has a power failure, and sent a telegram here suddenly after tens seconds, this is very harmful to the refrigeration plant such as air-conditioning, refrigerator-freezer, likely because the refrigerating system pressure of refrigeration plant not yet reaches balance, very easily cause compressor stall and burn out, even burying disaster hidden-trouble.After alternating current outside line has a power failure, the major function of power-on automatic switching on device is: after alternating current outside line has a power failure, while incoming call again, press setting-up time delayed startup motor switch automatic closing, complete unattended operation automatic closing power transmission, this device only has a power failure and just works in alternating current outside line.It can extensively use on the refrigeration plant such as air-conditioning, refrigerator-freezer in Mini Supermarkets, restaurant, is characterized in that cost of manufacture is low, easy for installation, safe and reliable to operation.

Circuit working principle: after alternating current outside line has a power failure, AC power and the motor switch DW16 of power-on automatic switching on device use same AC power.220V AC power is from the lower end of inlet wire air switch K1, and after incoming call, AC power is powered to time relay sj through intermediate relay ZJ normally-closed contact ZJ-1, and time relay sj obtains electric adhesive.Time relay sj is through time delay after 50～80 seconds, time relay sj normally opened contact SJ-1 closure, because normally opened contact SJ-1 is in parallel with the start button AN in motor switch DW16 for this reason, therefore start electric operator, drive motor switch DW16 closure, complete automatic closing transmission process.

In motor switch DW16 closure, its normally opened contact DJ is also simultaneously closed.AC power is through this contact to the intermediate relay ZJ adhesive of powering, and its normally-closed contact ZJ-1 disconnects simultaneously, makes time relay sj power-off tripping, and its normally opened contact SJ-1 also disconnects, and completes making process.

Because of intermediate relay ZJ self-holding contact ZJ-2 adhesive, make time relay sj be in off-state.Motor switch DW16 disconnects can automatic closing yet.Make interior lines power failure, power transmission not affect work.After only having alternating current outside line to have a power failure, circuit is just all got back to initial condition, then will be by automatic closing power transmission after the time delays of setting after incoming call.

Technical scheme: power-on automatic switching on device after alternating current outside line has a power failure, it comprises 220V AC power, air switch K1, time relay sj wire loop, intermediate relay ZJ wire loop and motor switch DW16, it is characterized in that:

Air switch K1: the upper termination 220V AC power live wire end L of air switch K1, the lower termination time relay sj coil of air switch K1 and intermediate relay ZJ self-holding contact ZJ-2 and motor switch DW16;

Time relay sj wire loop: lower termination time relay sj coil one end of air switch K1, another termination intermediate relay ZJ normally-closed contact of time relay sj coil ZJ-1 moving contact, intermediate relay ZJ normally-closed contact ZJ-1 fixed contact meets 220V AC power zero line side N;

Intermediate relay ZJ wire loop: intermediate relay ZJ coil one termination 220V AC power zero line side N, another termination intermediate relay ZJ self-holding contact ZJ-2 fixed contact of intermediate relay ZJ coil and motor switch DW16 normally opened contact DJ-1 fixed contact, intermediate relay ZJ self-holding contact ZJ-2 moving contact and motor switch DW16 normally opened contact DJ-1 moving contact connect the lower end of air switch K1;

Start button AN mono-termination time relay sj normally opened contact SJ-1 fixed contact in motor switch DW16, another termination time relay sj normally opened contact of the start button AN in motor switch DW16 SJ-1 moving contact.

Brief description of the drawings

Accompanying drawing 1 is the embodiment circuit working schematic diagram of power-on automatic switching on device after the utility model provides an alternating current outside line to have a power failure; In accompanying drawing 1, in dotted line, be the interlock normally opened contact DJ-1 on power distribution cabinet start button AN and motor switch DW16.

Embodiment

Power-on automatic switching on device circuit working schematic diagram and brief description of the drawings after having a power failure according to the alternating current outside line shown in accompanying drawing 1, and according to annexation between components and parts in the each several part circuit described in utility model content, and the components and parts technical parameter described in execution mode requires and circuit production main points are implemented to realize the utility model, below in conjunction with embodiment, correlation technique of the present utility model is further described.

The technical parameter of components and parts and selection requirement

K1 is air switch, selects the air switch of load current >=15A;

SJ is the time relay, and the model of selecting is JS7-2A;

ZJ is auxiliary relay, and the model of selecting is CJ10-10A, and capacity choosing is large a bit better;

DW16 is motor switch, is the interlock normally opened contact DJ-1 on power distribution cabinet start button AN and motor switch DW16 in accompanying drawing 1 in dotted line, requires the AC power inlet wire of this device to pick out from air switch lower end.

Circuit production main points and circuit debugging

4 appliance materials such as air switch K1, time relay sj, intermediate relay ZJ and motor switch DW16 are first arranged on suitable insulation board.Connected wiring by circuit working schematic diagram, 220V AC power is used binding post, is connected to facilitate with power distribution cabinet.After assembling, be applicable to position at power distribution cabinet and fix;

Because of alternating current outside line have a power failure after the circuit structure of power-on automatic switching on device fairly simple, comparison is easy, as long as the electronic devices and components performance of generally selecting is intact, and the components and parts annexation in accompanying drawing 1 is welded to specifications, physical connection line and welding quality are after careful inspection is correct, and circuit of the present utility model does not need to carry out any debugging and can normally work;

In the time of Installation and Debugging, first disconnection load, with the air switch K1 that controls 220V AC power live wire end L inlet wire, does the power failure of simulation 220V AC power, energization test.Adjust the delay time of time relay sj according to the actual needs of controlled electric equipment.

Points for attention

In the time meeting power failure, must make power failure reason clear, if having a power failure, outside line can process meeting automatic closing when incoming call; If power failure is caused in interior lines, must understand power failure reason, as: which kind of accident causes power failure, or interior lines need interruption maintenance; In the time that tripping operation occurs air switch K1, electricity consumer must correctly judge, especially power consumption equipment is short-circuited after fault, and under not clear failure condition, electricity consumer can't blindly close a floodgate! Otherwise easily because false judgment causes fault coverage to expand or the accident such as electric shock occurs, must pending fault handle and deal with problems arising from an accident, can closing by hand power transmission.

Claims

1. a power-on automatic switching on device after alternating current outside line power failure, it comprises 220V AC power, air switch K1, time relay sj wire loop, intermediate relay ZJ wire loop and motor switch DW16, it is characterized in that:

The upper termination 220V AC power live wire end L of described air switch K1, the lower termination time relay sj coil of air switch K1 and intermediate relay ZJ self-holding contact ZJ-2 and motor switch DW16;

Described time relay sj wire loop, lower termination time relay sj coil one end of air switch K1, another termination intermediate relay ZJ normally-closed contact of time relay sj coil ZJ-1 moving contact, intermediate relay ZJ normally-closed contact ZJ-1 fixed contact meets 220V AC power zero line side N;

Described intermediate relay ZJ wire loop, intermediate relay ZJ coil one termination 220V AC power zero line side N, another termination intermediate relay ZJ self-holding contact ZJ-2 fixed contact of intermediate relay ZJ coil and motor switch DW16 normally opened contact DJ-1 fixed contact, intermediate relay ZJ self-holding contact ZJ-2 moving contact and motor switch DW16 normally opened contact DJ-1 moving contact connect the lower end of air switch K1;

Start button AN mono-termination time relay sj normally opened contact SJ-1 fixed contact in described motor switch DW16, another termination time relay sj normally opened contact of the start button AN in motor switch DW16 SJ-1 moving contact.