CN2291986Y

CN2291986Y - Internal heating type safety electric soldering iron

Info

Publication number: CN2291986Y
Application number: CN 97215420
Authority: CN
Inventors: 谢小甦
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-22
Filing date: 1997-04-22
Publication date: 1998-09-23
Anticipated expiration: 2007-04-22

Abstract

The utility model relates to an internal heating type safety electric soldering iron. A porcelain pipe type electric heating core 1 whose outer part is sheathed with an insulation porcelain pipe 2 is arranged in a cavity of an electric soldering iron head 3 provided with a cavity. The electric soldering iron head 3 is inserted in a casing pipe whose outer part is provided with an iron outer shell 7. The inner part of the casing pipe is composed of a porcelain pipe with high temperature resistance 4, a stainless steel sheet heat radiation reflection layer 5 and a glass fiber insulating layer 6. The electric soldering iron of the utility model can prevent lots of heat energy from escaping from the outer shell and can enhance thermal efficiency. The thermal inefficiency of a 13W electric soldering iron with a specially small model number is equivalent to a 35W external heating type electric soldering iron. The temperature of the outer shell is lowered, the utility model can ensure that the outer shell is not damaged, the utility model can prevent equipment and hands from being scalded, the internal heating type safety electric soldering iron is safe, and the service life is long.

Description

Internal heat type safety electric iron

The utility model belongs to electroheat technology to be used, and is specifically related to a kind of internal heat type safety electric iron.

Electric iron commonly used on the market at present mainly contains external-heat electric iron and inner heating type electric iron two big classes.The external-heat electric iron comprises heating wire 1-1 as shown in Figure 1, mica insulation layer 1-2, iron pipe support 1-3, solder horn 1-4 and shell 1-5.

Its workflow is:

Actual measurement data is as follows: environment temperature: 25 ℃, operating voltage: the practical flatiron power of AC 220V: 50W, the actual measurement after 15 minutes of switching on: solder horn temperature: 482 ℃ of iron skin temperatures: 405 ℃

This electric iron, the heat electrical power that electric current produced: P=V ²/ R.These heats flow to both direction, on the one hand inwardly through mica layer and iron pipe support heating iron head, keeping operate as normal, but distribute a large amount of heats to the space simultaneously meaninglessly; And because the external-heat structure, in order to bear 1500V voltage and not breakdown, inside mica insulation layer is thicker, and the effective area of interior iron pipe support is less, and the effective area of outer iron-clad is big, the heat that outwards distributes is much higher than the heat of inside transmission.Therefore, this flatiron not only efficient is low, and outer iron-clad temperature height, and is dangerous.

Inner heating type electric iron comprises heating wire 2-1 as shown in Figure 2, porcelain tube insulating barrier 2-2, iron pipe support 2-3 and solder horn 2-4.

Its workflow is:

Electric current → heating wire → porcelain tube insulating barrier → iron pipe support → solder horn → (space).

Actual measurement data is as follows: environment temperature: 25 ℃, operating voltage: the practical flatiron power of AC 220V: 36W, the actual measurement after 15 minutes of switching on: solder horn temperature: 380 ℃ of iron skin temperatures: 420 ℃

This inner heating type electric iron, the electrical power of heat that electric current produces: P=V ²/ R.This heat is except that iron pipe support distributes a part of heat energy, and most of heat energy has been passed to solder horn.But because the periphery of whole solder horn is exposed fully, therefore, the temperature of whole solder horn even more taller than the electric soldering bit of external-heat is distributed a large amount of heat energy equally, and the thermal efficiency is very low, and dangerous.

In addition, because the heating part of inner heating type electric iron is the inside that is placed in solder horn, thereby the heat generating core of this flatiron is comparatively tiny, can only come coiling with very thin heating wire, and this has just caused heating wire to blow easily, thereby the life-span is shorter.

The purpose of this utility model is to provide a kind of thermal efficiency height, the life-span is long, security is good internal heat type safety electric iron.

Internal heat type safety electric iron of the present utility model, it is characterized in that the porcelain tube formula heating core that the outside is with porcelain tube is placed in the chamber of the electric soldering bit with cavity, this electric soldering bit is plugged on the outer iron shell that has, in have in the sleeve pipe that refractory ceramics pipe, heat radiation reflecting layer and glass fibre thermal insulation layer constitute.

Described heat radiation reflecting layer for example can be stainless steel thin slice or other materials similar.

The workflow of this flatiron is as follows:

Electric current → heating wire → porcelain tube (insulating barrier) → solder horn ... add the guarantor

Temperature thermal insulation layer ... retort stand → (space).

Actual measurement data is as follows: environment temperature: 25 ℃, operating voltage: the practical flatiron power of AC 220V: 13W, the actual measurement after 15 minutes of switching on: solder horn temperature: 365 ℃ of iron skin temperatures: 240 ℃

Internal heat type safety electric iron of the present utility model, the refractory ceramics pipe of its solder horn outside directly wraps up solder horn, has avoided heat energy to distribute from shell in a large number, thereby has improved the thermal efficiency greatly.The flatiron of the special ting model about unexistent in the market 13W, its thermal effect are equivalent to the external-heat electric iron of 35W.And, greatly reduce the temperature of shell, both guaranteed that shell was excellent, also can reduce equipment and staff greatly by the generation of the accident of scalding, fool proof, the life-span is also long.

Internal heat type safety electric iron of the present utility model, in order to prolong the life-span of heating wire, as shown in Figure 4, two of serial connections are withstand voltage in the electric wire circuit is 1000V/1A halfwave rectifier diode (using two in order to improve reliability).Owing to be to be operated in the alternating current circuit, therefore the electrical power in whole loop is reduced to original 0.45 times, that is: P=0.45V ²/ R ' can get R '=0.45V thus ²/ P if compare with original resistance R, just knows, when obtaining same electrical power, the resistance of R ' has only 0.45 times of R.Therefore, electric iron of the present utility model can be used thicker this heating core of heating wire coiling, thereby has prolonged the life-span of electric iron.

Because good heat insulation, heat scatters and disappears few, can reduce the power of electric iron significantly, and not only power savings is obvious, and, reduced widely to the environmental emission heat, especially in the summer of sweltering heat, improved the environment of numerous electronic workshops effectively.

Below in conjunction with accompanying drawing internal heat type safety electric iron of the present utility model is described further:

Fig. 1 is the structural representation of external-heat electric iron.

Fig. 2 is the structural representation of inner heating type electric iron.

Fig. 3 is the structural representation of the utility model internal heat type safety electric iron.

Fig. 4 is the circuit diagram of the utility model internal heat type safety electric iron.

As shown in Figure 3, inner heating type electric iron of the present utility model, in the chamber of electric soldering bit 3, place the outside porcelain tube formula heating core 1 that is with porcelain tube 2 with cavity, this electric soldering bit 3 be plugged on outer have refractory ceramics pipe 4 is arranged in the iron shell 7, in the sleeve pipe that stainless steel thin slice heat radiation reflecting layer 5 and glass fibre thermal insulation layer 6 constitute.

Claims

1. internal heat type safety electric iron, it is characterized in that the porcelain tube formula heating core 1 that the outside is with porcelain tube (2) is placed in the chamber of the electric soldering bit (3) with cavity, this electric soldering bit (3) be plugged on outer have refractory ceramics pipe (4) is arranged in the iron shell 7, in the sleeve pipe that heat radiation reflecting layer (5) and glass fibre thermal insulation layer (6) constitute.

2. internal heat type safety electric iron as claimed in claim 1 is characterized in that described heat radiation reflecting layer (5) is the stainless steel thin slice.

3. internal heat type safety electric iron as claimed in claim 1 or 2 is characterized in that in the electric wire circuit that two of serial connections are withstand voltage and is the halfwave rectifier diode of 1000V/1A.