CN2188239Y

CN2188239Y - Electric heating protector

Info

Publication number: CN2188239Y
Application number: CN 94227556
Authority: CN
Inventors: 王志安
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-15
Filing date: 1994-01-15
Publication date: 1995-01-25
Anticipated expiration: 2004-01-15

Abstract

The utility model discloses an electric heating protector, which is used for preventing electric heating kettles, and electric water heaters from dewatering and burning without water. The utility model is mainly composed of a temperature controlling probe, and a controlling contact, wherein, the temperature controlling probe is composed of a bimetallic temperature sensor, and analogue heating wires for burning without water arranged at the periphery of the bimetallic temperature sensor. The bimetallic temperature sensor is triggered by the heating temperature of the analogue heating wires for burning without water, and the power contact of electric heating tubes is finally controlled and switched on. When the utility model is installed in electric heating containers, the problem that an accident happens because the electric heating tubes are burnt out when the electric heating tubes burn without water can be solved. The utility model provides a reliable guarantee for the implementation of the national standard of safety performances for electric heating kettles, electric water heaters, electric heating showers, etc.

Description

Electric heating protector

The utility model relates to a kind of protective device that is used to prevent electric kettle, electric heater dehydration dry combustion method.

The dry combustion method of all can not dewatering when using of the electric kettle of domestic production at present, sale, otherwise electrothermal tube can be burnt, and cause that accident takes place.External existing electric heating dry combustion method protective device, being characterized in that electrothermal tube middle part is returned by bending reaches in the temperature control electrical equipment box, be provided with bimetallic temperature sensor on the electrothermal tube position in getting back to temperature control electrical equipment box, when electrothermal tube is in dry-fire condition, electrothermal tube with the heat transferred that produced to the bimetallic temperature sensor that is arranged on the electrothermal tube, impel the bimetallic temperature sensor action, to cut off the power contact in the electrical equipment box, but thisly pass the electric heating dry combustion method protective device that temperature is impelled bimetallic temperature sensor to move to control by electrothermal tube, it is subjected to electrothermal tube by dress and pins down, and it is slow that bimetallic temperature sensor absorbs heat, and operate time is long; Its complex structure in addition, the accuracy of manufacture requires high, and welding bimetallic temperature sensor difficulty is big on electrothermal tube, and when the electrothermal tube dry combustion method, the electrical equipment box easily produces high temperature.

The purpose of this utility model is to provide a kind of when electric heating element is in dry-fire condition, the electric heating dry combustion method protective device that can cut off the electricity supply rapidly at short notice for the deficiency that solves above technology.

In order to achieve the above object; the designed electric heating dry combustion method protector of the utility model mainly is made up of temperature probe and control contact two parts; wherein temperature probe is made up of bimetallic temperature sensor and the simulation dry combustion method heating wire that is arranged on its periphery; bimetallic temperature sensor is triggered by simulation dry combustion method electrothermal wire heating temperature; after the dehydration of simulation dry combustion method heating wire; it generates heat rapidly and impels bimetallic temperature sensor deformation, with quick reception dry combustion method signal.

For the bimetallic temperature sensor that makes deformation can pass to deformation signal the control contact rapidly, its temperature probe and control contact are closed in one, and are provided with the insulating knockout pin that transmits action between the moving contacting plate in bimetallic temperature sensor in temperature probe and the control contact.

For bimetallic temperature sensor and the control contact that makes deformation can in time reset; in electric heating dry combustion method protector, also be provided with bimetallic temperature sensor and the control contact reset key formed by push rod and spring; make it after dry combustion method is beated not by reset key then power supply keep off-position, further to guarantee the operate as normal of electric heating element.

In addition, will control the contact tripping reliably after thermal deformation rapidly in order to make bimetallic temperature sensor, its bimetallic temperature sensor can be selected butterfly shaped dual metal sheet for use especially.

The designed electric heating dry combustion method protector of the utility model is owing to buried simulation dry combustion method heating wire underground in the bimetallic temperature sensor periphery; bimetallic temperature sensor can be absorbed heat fast; make it to have shortened to a great extent dry combustion method fault time; protected the electrothermal tube security performance effectively; and it is simple in structure; be not subjected to pining down of electrothermal tube shape during by dress; can be installed in arbitrarily on the limit water level position; before making electrothermal tube also not be in dry-fire condition; simulation dry combustion method heating wire can be cut off the electricity supply by the heat that self dry combustion method produces, to guarantee the electrothermal tube operate as normal.

Fig. 1 is an electric heating dry combustion method protector general structure schematic diagram.

Fig. 2 is an electric heating dry combustion method protector external Design schematic diagram.

Fig. 3, Fig. 4 are electrical schematics.

Fig. 5 is that electric heating dry combustion method protector is by the assembling structure schematic diagram.

The utility model is further described by embodiment below in conjunction with accompanying drawing.

As Fig. 1; shown in Figure 2; the described electric heating dry combustion method of present embodiment protector is mainly by butterfly shaped dual metal sheet 1; simulation dry combustion method heating wire 2; quiet contact head 3 and control contact moving plate 4 are formed; between butterfly shaped dual metal sheet 1 and control contact moving plate 4, be provided with insulating knockout pin 5; be provided with butterfly shaped dual metal sheet and the control contact reset key of forming by spring 6 and push rod 12 in control contact moving plate 4 lower ends; be equipped with the dead ring 7 that is used for the casing insulation isolation in simulation dry combustion method heating wire 2 outer periphery; be equipped with the porcelain body 8 and the insulation division board 9 that is used to insulate in control contact outer periphery; electric heating dry combustion method protector is by pad 10; send out blue 14 by dress; nut 15 and shell 16 and combined outside; outside the push rod 12 of reset key, also be provided with guide pipe 13; be used for the guiding of reset key and to the isolation of lead-out wire 11; when lead-out wire 11 and electrothermal tube are connected; as shown in Figure 3; electrothermal tube 17 is in series with simulation dry combustion method heating wire 2; during the electric heating element operate as normal; the heat that simulation dry combustion method heating wire 2 produces is absorbed by water; its temperature is less than 100 ℃; keep operate as normal; when electric heating dry combustion method protector dehydration dry combustion method; the heat that simulation dry combustion method heating wire 2 produces is very fast to be absorbed by butterfly shaped dual metal sheet 1; when the operating temperature that heats up greater than butterfly shaped dual metal sheet 1; as shown in Figure 4; butterfly shaped dual metal sheet overturns rapidly; hit insulating knockout pin 5; control contact moving plate and fixed contact are disconnected; to cut off electrothermal tube power, to play protection to electrothermal tube.

In the present embodiment, the selected operating temperature of butterfly shaped dual metal sheet can be between 105 ℃ to 120 ℃, reset temperature can be less than-5 ℃, simulation dry combustion method heating wire can carry out the selection of different resistances and diameter according to the electrothermal tube of different capacity, to guarantee making the butterfly shaped dual metal sheet upset after the dry combustion method in the shortest time.

Electric heating dry combustion method protector by the dress can be as shown in Figure 5, below electric kettle kettle body 18, press dress electrothermal tube 17, press dress electric heating dry combustion method protector 19 in the kettle body above electrothermal tube, in the kettle body, be provided with and add water and connected power supply, then simulate dry combustion method protector and electrothermal tube and all be in dry-fire condition, but simulation dry combustion method protector produces self rapidly heat and protector was moved between some seconds, cuts off the electricity supply, as the water level of institute's water filling in the kettle body at spacing altitude line below 20; Then electrothermal tube is dipped in the water; and simulation dry combustion method protector is in dewatering state; after the energized; though electrothermal tube is at a spot of water of heating; but electric heating dry combustion method protector still moves within some seconds; cut off the electricity supply, when insulating pot topped up with water, energized; heating; after having seethed with excitement for a long time as water, decline of water table, is simulated the dry combustion method protector and is exposed the water surface gradually when following to spacing altitude line 20; when temperature rise is brought up to greater than the thermosensitive bimetal operating temperature; then simulate the action of dry combustion method protector, cut off the electricity supply, prevented that electrothermal tube from entering dry-fire condition.

The electric heating dry combustion method protector that the utility model is designed is desirable dry combustion method protective device, is again the protector that prevents dry combustion method, and it is to electric kettle, the electrothermal heater, and the enforcement of the national standard of security performances such as electric heating shower provides reliable assurance.

Claims

1, a kind of electric heating dry combustion method protector; it mainly is made up of temperature probe and control contact; it is characterized in that temperature probe is made up of bimetallic temperature sensor and the simulation dry combustion method heating wire that is arranged on its periphery, bimetallic temperature sensor triggers by simulating dry combustion method electrothermal wire heating temperature.

2, electric heating dry combustion method protector according to claim 1 is characterized in that temperature probe and control contact are connected as a single entity, and are provided with the insulating knockout pin that transmits action between the moving contacting plate in bimetallic temperature sensor in the temperature probe and the control contact.

3, electric heating dry combustion method protector according to claim 1 and 2 is characterized in that also being provided with bimetallic temperature sensor and the control contact reset key be made up of push rod and spring in electric heating dry combustion method protector.

4, electric heating dry combustion method protector according to claim 1 and 2 is characterized in that described bimetallic temperature sensor is a kind of butterfly shaped dual metal sheet.

5, electric heating dry combustion method protector according to claim 3 is characterized in that described bimetallic temperature sensor is a kind of butterfly shaped dual metal sheet.