The electric heater of external anti-electric shock apparatus
Technical field: the utility model relates to a kind of electric heater, especially a kind of electric heater of external anti-electric shock apparatus.
Background technology: the physics protection against electric shock technology of electric heater is a resistivity of utilizing water itself to be had, water is flowed in insulation tube, form resistance, by adjusting the length and the area of insulation tube, regulate resistance value, thereby leakage current is controlled in the safe range that people's physical efficiency bears (in the 30mA).Under the civil power environment of 220V, the relation of the interior radius of circle r of the length L of insulation tube and insulation tube satisfies L 〉=53r
2The time, leakage current can be controlled in the 30mA.
The physics protection against electric shock technology of existing electric heater is mainly two kinds: a kind of is that the insulation tube that the certain-length specification is set in inner container of electric water heater inside plays the built-in anti-electric shock apparatus that prevents the electric shock effect as water stream channel; Another kind is to make a circulation water stream channel and play the external anti-electric shock apparatus that prevents the electric shock effect in the coiling formula that inner container of electric water heater outer setting insulating materials is made.
Present external anti-electric shock apparatus is generally the box body shape structure of sealing, and box body is provided with water inlet, delivery port, the inner winding type water stream channel that is communicated with water inlet, delivery port that is separated to form with the silica gel sheet of box body.But because silica gel sheet and box body are easy to generate the gap for dividing body structure when both are fitted to each other, cause between water channel and the water channel because of the poor sealing phenomenon that occurs seeping water, thereby the length of water channel is changed, cause the anti-electric shock apparatus inefficacy; In addition, the infiltration gap of the aging or water erosion generation of silica gel sheet also can cause anti-electric shock apparatus to lose efficacy.Therefore, there are some safety defects in the electric heater of present external anti-electric shock apparatus.In order to overcome above defective, the electric heater of external anti-electric shock apparatus is developed.
Summary of the invention: technical problem to be solved in the utility model is the electric heater that a kind of external anti-electric shock apparatus will be provided, and it can reduce the hidden danger that the infiltration of external anti-electric shock apparatus was lost efficacy effectively, thus the security that improves electric heater.
The technical scheme that its technical problem that solves the utility model adopts is: it comprises inner bag, anti-electric shock apparatus and the waterpipe jointing that is communicated with inner bag, anti-electric shock apparatus is arranged at the inner bag outside and is communicated with waterpipe jointing, anti-electric shock apparatus comprises outer tube and interior pipe, outer tube is end sealing, the tubular body of other end opening, interior pipe is the tubular body of both ends open, interior Guan Yiduan is placed in the outer tube, form annular flow channel between outer tube wall and the outer wall of inner tube, interior pipe is communicated with waterpipe jointing by annular flow channel.
The openend of described outer tube is provided with the first outer pipe connector, and interior pipe is positioned at the outer end of outer tube and is provided with first pipe connector; The first outer pipe connector is the threeway shape, and first outer pipe connector one end and outer tube are tightly connected, and an end and waterpipe jointing are tightly connected, and an end and interior pipe box merge by the first interior pipe connector sealing; Be provided with water stream channel in the pipe connector in first, pipe in water stream channel one end is communicated with, other end opening.
The end riveted joint that the described first outer pipe connector is connected with waterpipe jointing has the attaching nut, the attaching nut is connected with water pipe joint thread, pipe connector is provided with bolt hole in the first outer pipe connector and first, pipe connector is by bolt, the affixed sealing of setscrew nut in the first outer pipe connector and first, between attaching nut and the waterpipe jointing, be provided with sealing ring between the first outer pipe connector and the first interior pipe connector.
The electric heater of described external anti-electric shock apparatus also comprises mixed water valve, mixes water valve and is communicated with the openend of water stream channel.
The openend of described outer tube is provided with the second outer pipe connector, and interior pipe is positioned at the outer end of outer tube and is provided with second pipe connector; Pipe connector is tightly connected with waterpipe jointing, the second outer pipe connector respectively in second, be provided with outer tube passage and inner pipe passway in the pipe connector in second, outer tube channel connection waterpipe jointing and annular flow channel, pipe in inner pipe passway one end is communicated with, other end opening.
The end riveted joint that pipe connector is connected with waterpipe jointing in described second has the attaching nut, the attaching nut is connected with water pipe joint thread, pipe connector is provided with bolt hole in the second outer pipe connector and second, pipe connector is by bolt, the affixed sealing of setscrew nut in the second outer pipe connector and second, between attaching nut and the waterpipe jointing, be provided with sealing ring between the second outer pipe connector and the second interior pipe connector.
The electric heater of described external anti-electric shock apparatus also comprises mixed water valve, mixes water valve and is communicated with the openend of inner pipe passway.
Described outer tube and interior pipe edge axis direction intussusception each other, the annulus area of annular flow channel longitudinal section equates with the inner headed face of interior pipe longitudinal section is long-pending.
Described waterpipe jointing is the delivery port of electric heater.
Described waterpipe jointing is the water inlet and the delivery port of electric heater.
The utility model is compared the beneficial effect that is produced with background technology: because the anti-electric shock apparatus that the utility model adopts the inner and outer pipes fit to form, avoided use silica gel sheet to separate water channel, it can reduce the hidden danger that the infiltration of external anti-electric shock apparatus was lost efficacy effectively, thus the security that improves electric heater.
Description of drawings: Fig. 1 is the structural representation of first kind of embodiment of the utility model;
Fig. 2 is the structure explosive view of anti-electric shock apparatus 2 among Fig. 1;
Fig. 3 is the structural representation of second kind of embodiment of the utility model;
Fig. 4 is the structure explosive view of anti-electric shock apparatus 2 among Fig. 3.
The specific embodiment: the utility model comprises housing, inner bag 1, heating tube, anti-electric shock apparatus 2, mixed water valve and the waterpipe jointing that is communicated with inner bag 1, heating tube is arranged in the inner bag 1, inner bag 1 is arranged in the housing, be provided with heat-insulation layer between inner bag 1 and the housing, inner bag 1 outer setting has the anti-electric shock apparatus 2 that is connected with waterpipe jointing, and anti-electric shock apparatus 2 is communicated with waterpipe jointing and mixed water valve.Anti-electric shock apparatus 2 is made by insulating materials, and it comprises outer tube 21 and interior pipe 22, and outer tube 21 is end sealing, semi-enclosed tubular body of other end opening, and interior pipe 22 is the tubular body of both ends open.The openend of outer tube 21 is communicated with waterpipe jointing.Interior pipe 22 1 ends are placed in the outer tube 21, and the other end is positioned at outside the outer tube 21.Form annular flow channel between outer tube 21 inwalls and interior pipe 22 outer walls, interior pipe 22 is communicated with waterpipe jointing by annular flow channel.During water inlet, water enters interior pipe 22 from mixing water valve, enters waterpipe jointing by annular flow channel again; During water outlet, water enters annular flow channel from waterpipe jointing, flows to mixed water valve from interior pipe 22 then.
First kind of embodiment of the present utility model, shown in Fig. 1-2, the openend of outer tube 21 is provided with the first outer pipe connector of being made by insulating materials 211, the first outer pipe connector 211 is the threeway shape, in pipe 22 be positioned at the outer ends of outer tube 21 and be provided with in first pipe connector, 221, the first interior pipe connectors of making by insulating materials 221 and be provided with water stream channel 222.First outer pipe connector 211 1 ends are riveted attaching nut 3 to be arranged and pass through attaching nut 3 and are connected with water pipe joint thread, and an end and outer tube 21 are tightly connected, and an end and interior pipe 22 covers merge first interior pipe connector 221 sealings by interior pipe 22.Interior pipe 22 1 ends pierce into the first outer pipe connector 211, stretch into outer tube 21 inside and are communicated with waterpipe jointing by annular flow channel.Be provided with bolt hole on the pipe connector 221 and the first outer pipe connector 211 in first, the first interior pipe connector 221 is fixedlyed connected by bolt, setscrew nut with the first outer pipe connector 211 and sealing each other.Pipe connector 221 is tightly connected with mixed water valve simultaneously in first, pipe 22 and mixed water valve in water stream channel 222 is communicated with.For preventing to leak, be provided with sealing ring between the pipe connector 221 and the first outer pipe connector 211 between attaching nut 3 and the waterpipe jointing, in first.In pipe connector 221 can be integrated or divide body structure in the pipe 22 and first, the outer tube 21 and the first outer pipe connector 211 can integrated or branch body structures.
Second kind of embodiment of the present utility model, as shown in Figure 3-4, it is adpting flange that the openend of outer tube 21 is provided with second outer pipe connector 212, the second outer pipe connectors of being made by insulating materials 212.Interior pipe 22 is positioned at outer tube 21 outer ends and is provided with second pipe connector of being made by insulating materials 223, and interior pipe 22 other ends stretch into outer tube 21 from the openend of outer tube 21, and are communicated with waterpipe jointing by annular flow channel.Pipe connector 223 is tightly connected with the second outer pipe connector 212 of waterpipe jointing, outer tube 21, mixed water valve respectively in second.Be provided with outer tube passage 224 and inner pipe passway 225 in the pipe connector 223 in second, outer tube passage 224 is communicated with waterpipe jointing and annular flow channel, pipe 22 and mixed water valve in inner pipe passway 225 is communicated with.The end riveted joint that pipe connector 223 is connected with waterpipe jointing in second has attaching nut 3 and is connected with water pipe joint thread by attaching nut 3.Be provided with bolt hole on the pipe connector 223 and the second outer pipe connector 212 in second, the second interior pipe connector 223 and the second outer pipe connector 212 pass through bolt, setscrew nut is affixed and sealing each other.For preventing to leak, also be provided with sealing ring between the pipe connector 223 and the second outer pipe connector 212 between attaching nut 3 and the waterpipe jointing, in second.Pipe connector 223 integrated or branch body structures in the interior pipe 22 and second, outer tube 21 and second outer the pipe connector 212 integrated or branch body structures.
For obtaining preferable water outlet effect, be the longitudinal section with the cross section of vertical outer tube 21, interior pipe 22 axis, the annulus area of the annular flow channel longitudinal section between the utility model middle external tube 21 inwalls, interior pipe 22 outer walls equates with the inner headed face of interior pipe 22 longitudinal sections is long-pending.At this moment, for guaranteeing that electric heater under the civil power environment of 220V, can be controlled at leakage current in the 30mA, the pass of the length sum L of outer tube 21, interior pipe 22 and the interior radius of circle r of interior pipe 22 is L 〉=53r
2
Waterpipe jointing in the utility model specifically is meant delivery port, the water inlet of electric heater, and anti-electric shock apparatus 2 can be provided with respectively at delivery port, water inlet simultaneously, also can be separately in the delivery port setting.
Anti-electric shock apparatus 2 of the present utility model is formed by the inner and outer pipes fit, compares with traditional built-in anti-electric shock apparatus, and the structure of two-tube fit helps dwindling the volume of anti-electric shock apparatus, makes the more compact structure of anti-electric shock apparatus; Compare with traditional external anti-electric shock apparatus,,, make anti-electric shock apparatus safer durable, make the electric heater safety and reliability so it can reduce the anti-electric shock apparatus Problem of Failure that causes because of the silica gel sheet effectively because the utility model does not use the silica gel sheet to separate water channel.