Detailed description of the invention
Elaborate a lot of detail in the following description so that fully understanding the present invention.But the present invention can implement being much different from alternate manner described here, and those skilled in the art can do similar popularization when without prejudice to intension of the present invention, therefore the present invention is by the following public restriction being embodied as.
Secondly, the present invention utilizes schematic diagram to be described in detail, and when describing the embodiment of the present invention in detail, for purposes of illustration only, described schematic diagram is example, it should not limit the scope of protection of the invention at this.
Add hot water facility, particularly electric kettle, have become as the necessary article in daily life.Existing electric kettle utilizes the temperature of steam in temperature sensor detection electric kettle mostly, when the temperature of steam reaches boiling point (being generally 100 degrees Celsius) of water, temperature sensor produces signal, the power supply making electric kettle disconnects, thus realizing automatically powering off of electric kettle.The above-mentioned operation principle for current electric kettle.But in this method, steam has directly contacted sensor, always it is in the environment of humidity when making sensor in working order, and sensor is often metal material, wet environment easily causes because of corrosion damage.Once sensor degradation, electric kettle cannot automatically power off, in the process adding hot water, and electric kettle meeting continuous firing, the water in kettle body is dryouied.Therefore the service life of existing electric kettle is shorter, and if electric kettle do not found in time after dryouting, it is possible to Circuits System can be caused damage, and easily caused by fire.
Consult the structural representation that Fig. 1, Fig. 1 are a kind of the first embodiments adding the protection device that hot water facility automatically powers off provided by the invention.This device 100 includes: detection module 110 and control module 120.Device 100 is connected to and adds hot water facility 101, in the present invention, adds hot water facility 101 for electric kettle 101.
Detection module 110 is for whether the water detected in electric kettle 101 is heated to boiling point.Detection module 110 includes steam accommodating chamber 111 and panel 112.Steam accommodating chamber 111 is the cavity of arbitrary shape, and in the present invention, setting steam accommodating chamber 111 is the cavity of cylinder type.One opening 114 is set in cavity and is communicated to electric kettle 101 inside by a passage 113, and when electric kettle 101 adds hot water, water level not can exceed that the opening (sign) that electric kettle 101 side connects.In steam accommodating chamber 111, the cross section along cavity arranges along body 1111, and the side of steam accommodating chamber 111 arranges control module 120, is positioned at the centre controlling module 120 and opening 114 along body 1111.Panel 112 is set up in along body 1111.The area of panel 112 is slightly less than the cross-sectional area of steam accommodating chamber 111, can move in steam accommodating chamber 111.
Control module 120 and be arranged at side relative with opening 114 in steam accommodating chamber 111, control module 120 and include a sensor 121, sensor 121 is arranged at position relative with opening 114 in steam accommodating chamber 111, and sensor 121 is connected to the power control circuit of electric kettle 101 by signal transmission wire.
When adding hot water to, when seething with excitement, producing substantial amounts of steam, steam, to external diffusion, produces bigger impulse force.Water can be converted into steam when temperature reaches boiling point.During by water in stove, coal gas or other equipment heating kettles, when water is boiled, the pot lid of kettle can be driven by the impulse force of steam and move upward, and separates with the kettle body of kettle.Along with pot lid separates with kettle body, steam is from the interstitial diffusion separated, and impulse force disappears, and pot lid falls.Visible, the water boiled moment reaching boiling point, the water vapor diffusion of generation can produce bigger impulse force.Although when water is below boiling point, water can also flash to steam lentamente, but now produce a small amount of water vapor diffusion time the impulse force that produces be not enough to separate pot lid with kettle body.In the present embodiment, when the water in electric kettle 101 is heated to boiling point, producing a large amount of steam and enter steam accommodating chamber 111 by passage 113 from opening 114, the impulse force that water vapor diffusion produces drives panel 112 to move in cavity.When panel 112 moves to the position of sensor 121, sensor 121 produces induced signal.This sensor 121 can be shaking sensor, come in contact with sensor 121 when panel 112 moves and produce vibrations, sensor 121 produces induced signal, induced signal is transferred to the power control circuit of electric kettle 101, power control circuit disconnects the power supply of electric kettle 101 after receiving induced signal, it is achieved automatically powering off of electric kettle 101.
In the present embodiment, panel 112 possesses certain weight.Although electric kettle 101 is in the process adding hot water, the air heats existed in kettle body expands through opening 114 and enters steam accommodating chamber 111, when water is not up to boiling point simultaneously, a small amount of steam of generation is also into steam accommodating chamber 111, but the impulse force of the two generation cannot drive panel 112 to move, only produce a large amount of steam after water boiling, the movement of panel 112 could be driven, thus without the situation producing water not boiling and electric kettle 101 power-off.
In other embodiments of the present invention, control module 120 and include a control circuit 121, control circuit 121 is independently-powered or is connected to the power control circuit of electric kettle 101, the part that the loop of control circuit 121 is arranged in steam accommodating chamber 111 disconnects and sets up both positive and negative polarity, the circuit turn-on when both positive and negative polarity contact is connected.Panel 112 is metallic plate.As shown in Figure 2.When the water in electric kettle 101 is heated to boiling; produce a large amount of steam by passage 113 enter steam accommodating chamber 111 time; produce impulse force and panel 112 is pushed to the positive and negative electrode that control circuit 121 separates; positive and negative electrode all contacts with panel 121; control circuit 121 is made to turn on; control circuit 121 arranges a relay 122; when control circuit 121 turns on; relay 122 is made to be energized work; the final on and off switch controlling electric kettle 101 is closed, thus playing the protective effect automatically powered off.
In other embodiments, panel 112 is nonmetallic materials, arranges conductive material in the side near control circuit 121, when the conductive material of panel 121 contacts with positive and negative electrode, and turn-on control circuit 121.When panel 112 is set to non-metal board, what contact with steam is nonmetal, can the contact of exclusion of water steam and control circuit 121, electric kettle 101 is shielded, extends its service life.
It is different from prior art; the protection device that hot water facility automatically powers off of adding of the present invention promotes a panel to move to the steam produced after boiling point adding hot water; judge when panel is moved to predeterminated position that water has reached boiling point; and then control to disconnect the power supply adding hot water facility, the contact of exclusion of water steam and control device.By means of the invention it is possible to the steam produced by whose boiling drives panel to move, exclusion of water steam and control the contact of device, thus avoiding adding the damage of hot water facility, extension device service life.
Consulting Fig. 3, Fig. 3 is a kind of schematic flow sheet adding the guard method embodiment that hot water facility automatically powers off provided by the invention.The step of the method includes:
S201: whether the water that detection adds in hot water facility is heated to boiling point, one steam accommodating chamber and a panel are set, the shape of panel is identical with the cross sectional shape of steam accommodating chamber cavity, the steam produced when adding hot water facility heating water to boiling point is by a passage flow to steam accommodating chamber, and drive panel to move in cavity, when panel moves to predeterminated position, it is determined that add the water in hot water facility and be heated to boiling point.
Whether the water in detection electric kettle is heated to boiling point.Steam accommodating chamber and panel are set.Steam accommodating chamber is the cavity of arbitrary shape, in the present invention, sets the steam accommodating chamber cavity as cylinder type.One opening is set in cavity by a channel connection inside electric kettle, and when electric heating kettle heating water, water level not can exceed that the opening that electric kettle side connects.In steam accommodating chamber, the cross section along cavity is arranged along body, and the side of steam accommodating chamber arranges control module, is positioned at the centre controlling module and opening along body.Panel is set up in along body.The area of panel is slightly less than the cross-sectional area of steam accommodating chamber, can hold indoor moving at steam.
S202: when judging that the water added in hot water facility is heated to boiling point, the power supply controlling to add hot water facility disconnects, and stops heating.
Being arranged at side relative with opening in steam accommodating chamber, arrange a sensor simultaneously, sensor is arranged at position relative with opening in steam accommodating chamber, and sensor is connected to the power control circuit of electric kettle by signal transmission wire.
When adding hot water to, when seething with excitement, producing substantial amounts of steam, steam, to external diffusion, produces bigger impulse force.According to general knowledge, water can be converted into steam when temperature reaches boiling point.During by water in stove, coal gas or other equipment heating kettles, when water is boiled, the pot lid of kettle can be driven by the impulse force of steam and move upward, and separates with the kettle body of kettle.Along with pot lid separates with kettle body, steam is from the interstitial diffusion separated, and impulse force disappears, and pot lid falls.Visible, the water boiled moment reaching boiling point, the water vapor diffusion of generation can produce bigger impulse force.Although when water is below boiling point, water can also flash to steam lentamente, but now produce a small amount of water vapor diffusion time the impulse force that produces be not enough to separate pot lid with kettle body.In the present embodiment, when the water in electric kettle is heated to boiling point, producing a large amount of steam and enter steam accommodating chamber by passage from opening, the impulse force that water vapor diffusion produces drives panel to move in cavity.When panel moves to the position of sensor, sensor produces induced signal.This sensor can be shaking sensor, come in contact with sensor when panel moves and produce vibrations, sensor produces induced signal, induced signal is transferred to the power control circuit of electric kettle, power control circuit disconnects the power supply of electric kettle after receiving induced signal, it is achieved automatically powering off of electric kettle.
In the present embodiment, panel possesses certain weight.Although electric kettle is in the process adding hot water, the air heats existed in kettle body expands through opening and enters steam accommodating chamber, when water is not up to boiling point simultaneously, a small amount of steam of generation is also into steam accommodating chamber, but the impulse force of the two generation cannot drive panel to move, only produce a large amount of steam after water boiling, the movement of panel could be driven, thus without the situation producing water not boiling and electric kettle power-off.
In other embodiments of the present invention, one control circuit is set, control circuit is independently-powered or is connected to the power control circuit of electric kettle, and the part that the loop of control circuit is arranged in steam accommodating chamber disconnects and sets up both positive and negative polarity, the circuit turn-on when both positive and negative polarity contact is connected.Panel is metallic plate.When the water in electric kettle is heated to boiling; when producing a large amount of steam by passage entrance steam accommodating chamber; produce impulse force and panel is pushed to the positive and negative electrode that control circuit separates; positive and negative electrode all contacts with panel, makes control circuit turn on, and arranges a relay in control circuit; during control circuit conducting; making relay power work, the final on and off switch controlling electric kettle is closed, thus playing the protective effect automatically powered off.
In other embodiments, panel is nonmetallic materials, arranges conductive material in the side near control circuit, when the conductive material of panel contacts with positive and negative electrode, and turn-on control circuit.When panel is set to non-metal board, what contact with steam is nonmetal, can the contact of exclusion of water steam and control circuit, electric kettle is shielded, extends its service life.
It is different from prior art; the guard method that hot water facility automatically powers off of adding of the present invention promotes a panel to move to the steam produced after boiling point adding hot water; judge when panel is moved to predeterminated position that water has reached boiling point; and then control to disconnect the power supply adding hot water facility, the contact of exclusion of water steam and control device.By means of the invention it is possible to the steam produced by whose boiling drives panel to move, exclusion of water steam and control the contact of device, thus avoiding adding the damage of hot water facility, extension device service life.
Although the present invention is with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art are without departing from the spirit and scope of the present invention; may be by the method for the disclosure above and technology contents and technical solution of the present invention is made possible variation and amendment; therefore; every content without departing from technical solution of the present invention; according to any simple modification, equivalent variations and modification that above example is made by the technical spirit of the present invention, belong to the protection domain of technical solution of the present invention.