CN2416581Y

CN2416581Y - Transformer for freezing cabinet

Info

Publication number: CN2416581Y
Application number: CN 00213494
Authority: CN
Inventors: 金葵娟; 慕志光; 白文涛; 王哲
Original assignee: Qingdao Haier Refrigerator Co; Haier Group Corp
Current assignee: Qingdao Haier Refrigerator Co; Haier Group Corp
Priority date: 2000-02-15
Filing date: 2000-02-15
Publication date: 2001-01-24
Anticipated expiration: 2010-02-15

Abstract

The utility model provides an improved transformer for a freezing cabinet. The utility model is composed of a primary coil, an iron core, a secondary coil, and an insulating and isolating layer. The utility model is characterized in that the secondary coil of a transformer is connected with a self recovering fuse in series which has the functions that the power can be automatically switched off at the over current time, and the power can be automatically switched on after a load is normal; the fuse does not need replacing, no manual operation is needed, and the fuse can be repeatedly used for many times. The self recovering fuse and the secondary coil are encapsulated in the insulating layer together and are integrated with the transformer together, the structure is compact, the manufacture is easy, the fuse can cut off a circuit like a fuse at the over current time, when the circuit is recovered to be normal, the power can be automatically switched on, no manual operation is needed, and the operation is easy.

Description

The refrigerator transformer

The utility model relates to a kind of refrigerator transformer, is a kind of automatic outage of overload, the normal back of load refrigerator transformer of recovery energising automatically that has specifically.

Along with improving constantly of refrigerator technology content, the continuous hommization of refrigerator function of use, transformer has been used for Freezer Products more and more, in use there are many factors can cause refrigerator transformer and other electric devices to burn, as: voltage ripple of power network is excessive, ambient temperature raises, no-load loss is excessive, no-load current is excessive etc.Traditional solution is to use fusible link to make overcurrent protection on the transformer secondary output circuit.But because fusible link can only use once, having blown just needs to change, and is equipped with more electricity pieces such as compressor, blower fan, thermostat in the cabin of refrigerator usually, and the general inconvenience in the residing position of refrigerator in using moves, and changes fuse and bothers very much.

The purpose of this utility model is to provide a kind of improved refrigerator transformer at the deficiencies in the prior art, has that overcurrent is cut off the power supply automatically, the normal back of load recovers the energising function automatically, need not to change fuse, need not manual operation.

The purpose of this utility model is achieved through the following technical solutions:

A kind of refrigerator transformer comprises: primary coil, iron core, secondary coil, dielectric isolation layer is characterized in that: be in series with a resettable fuse on the secondary coil.

Described resettable fuse is encapsulated in the dielectric isolation layer with secondary coil.

Advantage of the present utility model and good effect are: replace fusible link with resettable fuse, equally during overcurrent can cut off circuit with fusible link, circuit can recover energising after recovering normally voluntarily, need not manual operation, resettable fuse is connected in the transformer secondary output coil and becomes one with transformer, compact conformation, processing are manufactured conveniently, and be easy to use.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the circuit diagram of an embodiment of the utility model.

Among Fig. 1, primary coil 1, iron core 2, RL is a load resistance, and Rs is a resettable fuse 5, and it is the device that a kind of macromolecular material is made, and its impedance produces mutability along with temperature raises and raises, and Rs does not have polarity, and the AC and DC circuit all can use.On the transformer secondary output coil 3 behind the series connection resettable fuse 5, when transformer because irregular working causes when current spikes increases that temperature moment of resettable fuse 5 rises; impedance improves; the electric current that passes through diminishes, and entire circuit reaches the protection purpose as open circuit.After abnormal current disappeared, resettable fuse 5 reverted to low-impedance conductor, and circuit recovers energising, need not artificial the replacing or maintenance, and stood repeatedly test.

Resettable fuse 5 has the plurality of specifications model, can be according to the Capacity Selection of transformer suitable parameter.Resettable fuse 5 is encapsulated in the dielectric isolation layer 4 with secondary coil 3 when transformer is manufactured, and becomes one with transformer, compares its volume, cost with common refrigerator with transformer and there is no substantive increasing.

Claims

1, a kind of refrigerator transformer comprises: primary coil (1), (2), secondary coil (3) unshakable in one's determination, dielectric isolation layer (4) is characterized in that: be in series with a resettable fuse (5) on the secondary coil (3).

2, according to the said refrigerator transformer of claim 1, it is characterized in that: resettable fuse (5) is encapsulated in the dielectric isolation layer (4) with secondary coil (3).