CN2612898Y

CN2612898Y - A PTC liquid electric heater

Info

Publication number: CN2612898Y
Application number: CN 03229263
Authority: CN
Inventors: 刘力强
Original assignee: Shanghai Yorp Electronics Science & Technology Co Ltd
Current assignee: Shanghai Yorp Electronics Science & Technology Co Ltd
Priority date: 2003-03-07
Filing date: 2003-03-07
Publication date: 2004-04-21
Anticipated expiration: 2013-03-07

Abstract

Disclosed is a PTC (Phenylthiocarbamide)liquid electric heater comprising a metal outer-shell with a power line inlet at an end, a plurality of PTC heating flakes, two electrodes. The PTC heating flakes are paralleled and fixed between the two electrodes, an insulator which one side is adhesive to the electrodes, the other side is contacted tightly with inner wall of the metal outer-shell, a power line which is connected with the electrodes and is used for feeding power to the electrodes, is connected with outside through the power line inlet of the metal outer-shell.

Description

A kind of PTC liquid electric heater

Technical field

The utility model relates to a kind of PTC liquid electric heater.

Background technology

At present the method that liquid is heated normal employing has two kinds: adopt ptc heater, copper pipe or other metal tube are fixed on the PTC heater, heated by the PTC heater when flow of liquid is crossed copper pipe or other metal tubes, the shortcoming of this method is that the heat efficiency is low, the cost height; Adopt resistance heater, resistance heater can directly be put into liquid and heat, but useful life is short, and can cause the dry combustion method phenomenon, and is accidents caused easily.

Summary of the invention

The purpose of this utility model provides a kind of PTC liquid electric heater; can directly put into liquid heats for liquid; to improve the efficiency of heating surface; simultaneously also can substitute existing resistance heater; compare with resistance heater, this PTC liquid electric heater has that long service life, temperature are protected automatically, advantage reliably.

In order to achieve the above object, the utility model has adopted following technical scheme:

A kind of PTC liquid electric heater comprises:

Metal shell, described metal shell one end have the power line inlet;

Several PTC heating sheets;

Two electrodes, described several PTC heating sheet parallel connections are fixed between two electrodes;

Insulator, a side of described insulator is bonded on the described electrode, and opposite side closely contacts with the inwall of described metal shell;

Power line, described power line link to each other with described electrode and are its power supply, and described power line links to each other with the external world by the power line inlet of described metal shell.

Description of drawings

Fig. 1 is the structure chart of heater block of the present utility model;

Fig. 2 is the schematic diagram of heater block of the present utility model;

Fig. 3 is the structural representation of overlooking of an embodiment of the present utility model;

Fig. 4 is the schematic diagram of the side-looking of the described embodiment of Fig. 3.

Embodiment

Further specify the technical solution of the utility model below in conjunction with accompanying drawing.

Fig. 1 is the structure chart of heater block of the present utility model, as shown in Figure 1, heater block of the present utility model comprises PTC heating sheet 1, electrode 2 and insulator 3, several PTC heating sheet 1 parallel connections are fixed between the electrode 2 of two sheets, PTC heating sheet 1 and electrode 2 are bonding and compress, and the outside of electrode is the insulator 3 of two sheets, and is onesize or big slightly with electrode 2, insulator 3 usefulness silicone grease are bonded on the electrode 2 and compress, and also will coat silicone grease on the insulator 3.Fig. 2 is with the generate heat schematic diagram of sheet 1, electrode 2 and insulator 3 heater block after being bonded together of PTC.

Fig. 3 is the structural representation of overlooking of an embodiment of the present utility model, as shown in Figure 3, metal shell is that a metal circular tube or square tube flattening are formed, one end of metal tube is the power line inlet, this power line inlet is the pipe shape, above-mentioned heat generating components is put into from the other end of metal tube, make the insulator of heater block both sides contact good with the inwall of metal shell and be bonded together to guarantee radiating effect with the inwall of silicone grease with insulator and metal shell, power line linked to each other with electrode and power line is drawn, just form a complete PTC liquid electric heater after metal shell is placed this end gummed of heat generating components or welding from the power line inlet of the metal shell other end.

Fig. 4 is the schematic diagram of the side-looking of the described embodiment of Fig. 3, and metal shell is for forming a metal circular tube or square tube flattening as seen from the figure, and the power line inlet is the pipe shape.

PTC liquid electric heater of the present utility model can directly be put into liquid and heat; improved the heat efficiency greatly; this heater structure is simple; long service life; and because ptc material has the characteristic of automatic temperature-adjusting protection; this electric heater can in the time of 250 ℃, cut off the power supply automatically, so can effectively be avoided the dry combustion method phenomenon.

Claims

1. a PTC liquid electric heater is characterized in that, comprising:

Metal shell, described metal shell one end have the power line inlet;

Several PTC heating sheets;

2. PTC liquid electric heater as claimed in claim 1 is characterized in that, described metal shell is that a pipe or square tube are flattened back formation, and the power line inlet of metal shell is the pipe shape.

3. PTC liquid electric heater as claimed in claim 1 is characterized in that, described electrode and insulator are sheet.

4. PTC liquid electric heater as claimed in claim 1 is characterized in that, scribbles silicone grease between described electrode and the described insulator and between described insulator and the described metal shell.