CN112447444A

CN112447444A - Heating wire of thermal switch

Info

Publication number: CN112447444A
Application number: CN202011482593.1A
Authority: CN
Inventors: 匡成效; 倪龙华
Original assignee: Jiangsu Changrong Electric Appliance Co Ltd
Current assignee: Jiangsu Changrong Electric Appliance Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-05

Abstract

The invention provides a heating wire of a thermal switch, which is used for a heating element of the thermal switch, and the heating wire is composed of a strip-shaped metal plate, two ends of the strip-shaped metal plate form planar conductive pins, a plurality of bent parts are arranged on the strip-shaped metal plate, a quadrilateral shape with one open end is integrally formed, and the positions of two conductive pins are positioned in the quadrilateral shape. The structural design of the heating wire increases the length of the heating wire; the width or the thickness of the heating sheet is increased to increase the physical sectional area of the heating sheet, so that the anti-current impact capability of the heating sheet is increased, and the fusing is prevented.

Description

Heating wire of thermal switch

Technical Field

The invention relates to a heating wire of a thermal switch.

Background

The thermal switch is applied to, for example, a hermetic electric compressor for compressing a refrigerant such as an air conditioner, in which the rotation of the motor is restricted for various reasons in the current under normal operation conditions, and in this case, an overcurrent which is several times larger than the normal operation current flows through the motor. Therefore, the coil of the motor is often burned. In order to protect the motor, the heating wire of the thermal switch must have a necessary resistance value, and the conventional heating wire is a strip-shaped metal plate, so that the effect of protecting the motor cannot be achieved.

Disclosure of Invention

In order to overcome the defects, the invention provides a heating wire of a thermal switch with a novel structure.

The technical scheme of the invention is as follows:

a heating wire of a thermal switch is used for a heating element of the thermal switch, the heating wire is composed of a strip-shaped metal plate, two ends of the strip-shaped metal plate form planar conductive pins, a plurality of bent parts are arranged on the strip-shaped metal plate, a quadrilateral shape with one open end is integrally formed, and the positions of two conductive pins are located in the quadrilateral shape.

Preferably, the metal plate in a band shape is divided into a first module, a first connecting portion, and a second module; the first module and the second module are arranged in parallel, the middle parts of the first module and the second module are connected through a first connecting part, and the end parts of the two modules are respectively connected with the conductive pins.

Preferably, the metal plate of the first module in the form of a strip is bent in a serpentine shape and then bent axially in the direction in which the metal plate extends, assuming a configuration of upper and lower ends.

Preferably, the strip-shaped metal plate of the second module comprises two parts, namely a bent part and a straight plate part, wherein the bent part is wavy, the bottom plane is opposite to the straight plate plane, and the bent part is connected with the straight plate part through an arc-shaped second connecting part.

As another configuration, the shape of the second module band-shaped metal plate may be the same as the shape of the first module band-shaped metal plate, and similarly, the shape of the first module band-shaped metal plate may be the same as the shape of the second module band-shaped metal plate, and the second module band-shaped metal plate may be symmetrically disposed.

Preferably, the connecting end of the first connecting portion is connected at the lower end of the first module and then extends to the connecting end of the second module, and is perpendicular to the bottom plane of the wavy bent portion, and the connecting end of the second module is bent by a wavy metal plate for 90 degrees and then extends downwards to be connected with the first connecting portion.

As another structure, the first connecting portion may be connected to the upper end of the first module, and then extend to the connecting end of the second module, which is perpendicular to the bottom plane of the wavy bent portion, and the connecting end of the second module is bent by a wavy metal plate at 90 ° and then extends upward to connect with the first connecting portion.

The invention has the beneficial effects that:

1. and a, increasing the length of the heating wire. b. The width (or thickness) of the heating sheet is increased to increase the physical sectional area of the heating sheet, so as to increase the current impact resistance (fusing prevention) of the heating sheet.

2. In order to install the heating wire at the original position of the protector, the heating sheet is designed to be a wave structure (shown in figures 2-1 and 1) to compress or reduce the installation space of the heating wire, the wave structure is processed by a die, the radius of a circle (arc) of a single wave structure is between 0.2mm and 1.4mm, and the single wave structure can be bent to compress the installation space; the whole heating plate at least needs to contain 3 wave structures.

3. The wave structure has obvious auxiliary heating effect under the power-on working condition because the heating sheet materials are distributed densely; at terminal welding one side, because terminal composition contains iron, nickel material, terminal self under the circular telegram operating mode, the welding position can produce a large amount of heats simultaneously, this heat needs the route of giving off, so apart from the terminal in terminal one side, piece welding position generates heat (straight plate portion 2-2 to electrically conductive pin 4 departments) 60mm position at least, do not contain the wave structure for the thermal giving off of welding position is alleviated in the help, so the design has obviously promoted the anti-current impact (fusing) ability of the piece that generates heat.

Drawings

FIG. 1 is a first perspective view of the heater of the present invention;

fig. 2 is a second perspective view of the heater of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 and 2, a thermal switch heating wire for a thermal switch heating element is composed of a strip-shaped metal plate, wherein two ends of the strip-shaped metal plate form planar conductive pins, the strip-shaped metal plate is provided with a plurality of bent parts to form a quadrilateral shape with one open end, and the two conductive pins 4 are positioned in the quadrilateral shape.

Preferably, the metal plate in a band shape is divided into a first module 1, a first connection portion 3, and a second module 2; the first module 1 and the second module 2 are arranged in parallel, the middle parts of the first module and the second module are connected through a first connecting part 3, and the end parts of the two modules are respectively connected with a conductive pin 4.

Preferably, the metal plate of the first module 1 in the form of a strip is bent in a serpentine shape and then bent axially in the direction in which the metal plate extends, assuming a configuration of upper and lower ends.

Preferably, the strip-shaped metal plate of the second module 2 comprises two parts, namely a bent part 2-1 and a straight plate part 2-2, wherein the bent part 2-1 is wavy, the bottom plane is opposite to the plane of the straight plate part 2-2, and the bent part 2-1 is connected with the straight plate part 2-2 through an arc-shaped second connecting part 2-3.

As another configuration, the shape of the strip-shaped metal plate of the second module 2 may be the same as the shape of the strip-shaped metal plate of the first module 1, and similarly, the strip-shaped metal plate of the first module 1 may be the same as the shape of the strip-shaped metal plate of the second module 2, and may be symmetrically disposed, thereby achieving the same effects.

Preferably, the connection end of the first connection part 3 is connected to the lower end of the first module 1, and then extends to the connection end of the second module 2, and is perpendicular to the bottom plane of the wavy bent part 2-1, and the connection end of the second module 2 is bent by 90 degrees by the wavy metal plate and then extends downward to be connected to the first connection part 3.

As another structure, the first connecting portion 3 may be connected to the upper end of the first module 1, and then extend to the connecting end of the second module 2, which is perpendicular to the bottom plane of the wavy bent portion 2-1, and the connecting end of the second module 2 is bent by a wavy metal plate at 90 ° and then extends upward to connect with the first connecting portion 3.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A heating wire of a thermal switch is used for a heating element of the thermal switch, and is characterized in that: the heating wire is composed of a strip-shaped metal plate, two ends of the strip-shaped metal plate form planar conductive pins, a plurality of bending parts are arranged on the strip-shaped metal plate, a quadrilateral shape with one open end is integrally formed, and the positions of the two conductive pins are located in the quadrilateral shape.

2. A heat generating wire of a thermal switch according to claim 1, wherein: the strip-shaped metal plate is divided into a first module, a first connecting part and a second module; the first module and the second module are arranged in parallel, the middle parts of the first module and the second module are connected through a first connecting part, and the end parts of the two modules are respectively connected with the conductive pins.

3. A heat generating wire of a thermal switch according to claim 1, wherein: the band-shaped metal plate of the first module is bent in a serpentine shape and then axially bent in a direction in which the metal plate extends to assume an upper-lower end configuration.

4. A heat generating wire of a thermal switch according to claim 1, wherein: the banded metal sheet of second module contains two parts, is tortuous portion and straight board portion respectively, and the tortuous portion becomes wavy, and the bottom plane is relative with straight board portion plane, is connected through the second connecting portion of arc form between tortuous portion and the straight board portion.

5. A heat generating wire of a thermal switch according to claim 3, wherein: the shape of the second module strip-shaped metal plate is the same as that of the first module strip-shaped metal plate, and the second module strip-shaped metal plate and the first module strip-shaped metal plate are symmetrically arranged.

6. A heat filament of a thermal switch according to claim 4, wherein: the shape of the first module strip-shaped metal plate is the same as that of the second module strip-shaped metal plate, and the first module strip-shaped metal plate and the second module strip-shaped metal plate are symmetrically arranged.

7. A heater of a thermal switch according to any one of claims 3 to 4, wherein: the connecting end of the first connecting portion is connected with the lower end of the first module, extends to the connecting end of the second module and is perpendicular to the bottom plane of the wavy zigzag portion, and the connecting end of the second module is bent by a wavy metal plate for 90 degrees and then extends downwards to be connected with the first connecting portion.

8. A heater of a thermal switch according to any one of claims 3 to 4, wherein: the connecting end of the first connecting portion is connected with the upper end of the first module, extends to the connecting end of the second module, is perpendicular to the bottom plane of the wavy zigzag portion, and the connecting end of the second module is bent by a wavy metal plate for 90 degrees and then extends upwards to be connected with the first connecting portion.