CN2471405Y - Glass hot-bath with protection of electric leakage - Google Patents

Abstract

A glass thermal bath with leakage protection, which has a glass container, the glass container contains a liquid heat transfer medium, an electric heater is inserted in the glass container, and the electric heater is connected with a leakage protection plug (or switch). Another leakage protection electrode is inserted into the heat medium, and the leakage protection electrode is connected with a wire. When using a glass thermal bath, connect the wire to the ground wire. When the electric heater leaks electricity, an electrical path is formed through the liquid heat transfer medium, the leakage protection electrode, the wire and the ground wire, and the leakage protection plug is immediately cut off from the power supply, thereby ensuring the safety of the experimenters.

Description

A glass hot bath with leakage protection

The utility model relates to a leakage protection device.

In the laboratories of colleges and universities in our country, glass hot baths are widely used. The glass hot bath is an electric heater such as an electric heating rod inserted in a glass container filled with a liquid heat transfer medium. Because of its simple structure, low cost, easy temperature control and good thermal insulation performance, this kind of glass hot bath is very popular among experimenters. But there is a shortcoming in this glass hot bath, once the electric heater leaks, it will hurt the experimenter. In order to ensure the safety of the experimenters, the electric heater adopts a leakage protection plug (or switch). The working principle of this kind of leakage protection plug is that after the electric heater leaks electricity, the currents flowing in and out of the two ends of the electrodes are not equal, and electromagnetic induction is generated to drive the relay switch to cut off the power supply. But because the glass is an insulator, when the electric heater leaks, it cannot form a current path outside the electric heater, so the currents flowing in and out of the electrodes of the electric heater are basically equal, which is not enough to generate electromagnetic induction to drive the relay switch. Once the experimenter's body comes into contact with the liquid heat transfer medium, since the human body is a good conductor of electricity, he will be shocked by electric shock. Even if no serious personal injury is caused, the experimenter may be frightened by the electric shock, and an experimental accident may easily occur.

The purpose of this utility model is to provide a glass hot bath with leakage protection, once the electric heater leaks, the power supply will be cut off immediately.

The technical scheme of the utility model is as follows:

A glass thermal bath with leakage protection, it has a glass container, the glass container contains a liquid heat transfer medium, an electric heater is inserted in the glass container, the electric heater is immersed in the liquid medium, and the electric heater is connected with a leakage protection plug (or switch). In the liquid heat transfer medium, another leakage protection electrode is inserted, which can be made of any conductor with good electrical conductivity, stable chemical properties, and no chemical reaction with the liquid heat transfer medium, such as stainless steel or copper rods. The electrode can be in any shape, but must be inserted into the liquid heat transfer medium, or be in contact with the liquid heat transfer medium. The leakage protection electrode is connected with a wire, and the wire is connected to the ground wire (not the neutral wire) when using a glass hot bath.

The utility model has simple structure and low cost.

Fig. 1 is the schematic diagram of an example of the present utility model.

Embodiment: a glass thermal bath with leakage protection, which has a glass container 1 filled with liquid heat transfer medium brine, inserting an electric heater 4 in the liquid heat transfer medium, and the electric heater is connected with an LDC leakage protection plug (Changzhou Xin'an Electric Co., Ltd. switch factory), insert another leakage protection electrode 3 (stainless steel metal rod) into the liquid heat transfer medium, the leakage protection electrode is connected with a wire 6, when using a glass hot bath, connect the wire 6 to the ground wire 5, and the leakage protection plug 2 Plug into the power outlet.

Claims (1)

1. be with earth leakage protective glass heating bath for one kind; it has a glass container (1); in fill liquid heat catalysis; in glass container (1), be inserted with electric heater (4); electric heater (4) is connected with leakage protecting plug (or switch) (2), it is characterized in that inserting an earth leakage protective electrode (3) in addition in liquid heat catalysis, and earth leakage protective electrode (3) is connected with lead (6); when using the glass heating bath, lead (6) is connected with ground wire (5).