CN101294745B - Electric water heater with three-dimensional electricity guard wall function - Google Patents
Electric water heater with three-dimensional electricity guard wall function Download PDFInfo
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- CN101294745B CN101294745B CN2008100624531A CN200810062453A CN101294745B CN 101294745 B CN101294745 B CN 101294745B CN 2008100624531 A CN2008100624531 A CN 2008100624531A CN 200810062453 A CN200810062453 A CN 200810062453A CN 101294745 B CN101294745 B CN 101294745B
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Abstract
The invention discloses an electric water heater with three-way shockproof function. The electric water heater includes a shell body, an earth wire and an inner bag with a water inlet and a water outlet. The electric water heater is characterized in that either the water inlet or the water outlet is hermetically connected with a security protection device, the other is hermetically connected with a lengthened water pipe or the security protection device, wherein the security protection device includes a metal conductive component as well as a first water pipe and a second water pipe which sequentially communicate with each other and have the pipe walls made of insulating material. The metal conductive component only keeps contact with the water flow therein at the joint of the first water pipe and the second water pipe, and the earth wire is electrically connected with the metal conductive component; in addition, all current intensities of the current passing through the lengthened water pipe, the current passing through the first water pipe and the current passing through the second water pipe are smaller than 5mA. When the earth wire is in loose or poor contact, and water heater creepage occurs, the electric water heater causes no damage to the user of the water heater and other electrical appliances; when the earth wire is in loose or poor contact and earth wire electrification occurs because of the creepage of other electrical appliances, the safety of the user of the water heater can be ensured.
Description
Technical field
The present invention relates to electric heater, particularly a kind of electric heater with three-dimensional electricity guard wall function.
Background technology
The power utilization environment present situation of China is a shared ground wire of residential building, this root ground wire is constantly connecting different users, and connecting electrical equipment different in the user family, if this theoretically connection ground wire is good, the use of water heater is safe, but the present situation of China is that this root ground wire is shared ground wire, and unmanned maintenance and maintenance can produce behind rain erosion and lose efficacy; In addition, residential building resident after payment of China generally can carry out secondary decoration, thereby some laymans can cause the destruction of ground wire to cause earth wire failure in the secondary decoration process.Therefore, the electricity consumption present situation of China is that shared ground wire connects the different electrical equipment without the user, and this ground wire may lose efficacy.
The present situation of Sinomania hydrophone is at present: the triumphant dress formula heater of the basic all uses of heater, the metal material of its shell is that sheet metal is welded behind the pulleying circle.In use, have three kinds of factors can cause the electric leakage of breaking of triumphant dress formula heater: the one, weld defect, local welding is bad to cause the metal tube electric leakage of breaking; The 2nd, the self-defect of metal tube material, long-time immersion back metal defect breaks and causes electric leakage in water; The 3rd, the water quality in the user family, thereby acid bigger water can produce corrosion to the metal surface causes the heater electric leakage, after the water that hardness is bigger passes through long-time heating, heater surfaces can fouling cause the heater radiating effect relatively poor, thereby its surface temperature constantly increases and causes the heater electric leakage of breaking.Therefore, the electric leakage of heater is one of most common failure of present water heater at present.
In present water heater; the technical protection that electric leakage is carried out at ground wire electrification and water heater is arranged; when it can effectively prevent water heater electric leakage and ground wire electrification the water heater user is caused electric shock; but when it can not prevent the water heater electric leakage other electrical equipment user who connects ground wire is caused electric shock; that is to say only have one to anti-electric wall function.Chinese utility model patent as the patent No. 200620071064.1 discloses the anti-electric wall of electric heater external socket type, mainly form by cover, cylindrical shell and tube core, the conical sleeve that described tube core can lock voluntarily and seal after by the layer 2-4 mutual sheathing is formed, the conical sleeve outer wall is provided with the axial screw rib, the tube core is fitted in the cylindrical shell, and the axial screw rib of internal layer conical sleeve outer wall is formed axial screw insulation aquaporin with the outer conical sleeve inwall that contacts with it.Promptly there are the problems referred to above in this patent.
Summary of the invention
Technical problem to be solved by this invention is the present situation at prior art, and a kind of electric heater with three-dimensional electricity guard wall function is provided.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
The present invention has the electric heater of three-dimensional electricity guard wall function, comprise housing, earth connection and be provided with water inlet and the inner bag of delivery port, it is characterized in that: one in described water inlet and the delivery port is sealedly connected with safety guard, and another is sealedly connected with and adds long water pipe or described safety guard; Wherein, described safety guard comprises that metallic conduction parts and two tube walls that are communicated with in turn are first water pipe and second water pipe of insulating materials, these metallic conduction parts only keep in touch with current by wherein in the junction of described first water pipe and second water pipe, and described earth connection is electrically connected with these metallic conduction parts; And, electric current by described add long water pipe, electric current by described first water pipe and the electric current current strength after by the current in described second water pipe all less than 5mA.Obviously, comparatively preferred scheme is that described water inlet and described delivery port all are sealedly connected with described safety guard.
Specific design as for described metallic conduction parts, a kind of more excellent design is: described metallic conduction parts comprise the connecting portion that keeps in touch with current, be embedded in the conductive part of the described second water pipe body inside and be located at the ground wire connections that is connected with earth connection on the described second water pipe body, and the two ends of conductive part connect described connecting portion and ground wire connections respectively.Such design helps being provided with suitable earth point, to be convenient to connect earth connection.
For ease of processing and manufacturing, preferably: described first water pipe, second water pipe and connecting portion are cylindric, and an end of connecting portion is communicated with described second water pipe sealing, and the other end is communicated with described first water pipe sealing.Perhaps, described first water pipe is the cylindric insulation body of end sealing, described connecting portion is that sidewall has the cylindric of through hole, this connecting portion in described first water pipe and the blind end of an end and first water pipe be tightly connected, the other end is communicated with second water pipe sealing of stretching into first water pipe.Leakage current under the ground connection failure conditions is less than the specification requirement of 5mA according to appendix A A among the up-to-date GB GB4706.12-2006, be easy to just to know by inference the dimensional requirement of arbitrary one section water pipe (first water pipe, second water pipe and add long water pipe), be pipe range L＞22000S/ ρ, wherein ρ is an electrical conductivity of water, and S is the sectional area of in-pipe flow passage.
The described conductive part conductor wire between the described second water pipe body inside and outside wall that is formed in one.Be preferably: the described conductive part cylindrical metal pipe between the described second water pipe body inside and outside wall that is formed in one, this structure helps to reduce the risk of broken string.
Described ground wire connections is to be the one-body molded annular element at described second pipe outer wall of setting-in state, which is provided with groove.
Described connecting portion is for passing through the one-body molded nipple in the described second water pipe end of embedding and injection molding, and the described first water pipe end is provided with the internal thread screw adaptive with this nipple.
Compared with prior art, the present invention has following effect:
The present invention has the function of three-dimensional electricity guard wall.Promptly when the ground wire sky connect or condition of poor under, the water heater electric leakage takes place, can not cause any harm to the user of this water heater and other electrical equipment user of connecting this ground wire; When the ground wire sky connect or condition of poor under, when other electrical leakage taking place causing ground wire electrification, can guarantee that the water heater user can not come to harm.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one.
Fig. 2 is the structural representation of water inlet safety guard among Fig. 1;
Fig. 3 is the sectional view of second water pipe among Fig. 2;
Fig. 4 is the structural representation of the invention process two Zhong Chu mouth of a river safety guards.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Embodiment one
As Fig. 1～shown in Figure 3, present embodiment has the electric heater of three-dimensional electricity guard wall function, comprises housing 1, earth connection 2 and is provided with water inlet 3 and the inner bag 5 of delivery port 4, is provided with calandria 6 in the inner bag 5.Water inlet 3 and delivery port 4 all are sealedly connected with a safety guard 20.Safety guard 20 comprises that metallic conduction parts and two tube walls that are communicated with in turn are first water pipe 7 and second water pipe 8 of insulating materials, these metallic conduction parts only keep in touch with current by wherein in the junction of described first water pipe 7 and second water pipe 8, and described earth connection 2 is electrically connected with these metallic conduction parts; And, electric current by described first water pipe 7 and the electric current current strength after by the current in described second water pipe 8 all less than 5mA.
Above-mentioned metallic conduction parts comprise the connecting portion 9 that keeps in touch with current, be embedded in the conductive part 10 of second water pipe, 8 body inside and be located at the ground wire connections 11 that is connected with earth connection 2 on second water pipe, 8 bodys, and the two ends of conductive part 10 connect described connecting portion 9 and ground wire connections 11 respectively.
Above-mentioned first water pipe 7, second water pipe 8 and connecting portion 9 is cylindric, and an end of connecting portion 9 is communicated with 8 sealings of described second water pipe, and the other end is communicated with 7 sealings of described first water pipe.In the present embodiment, first water pipe 7 and second water pipe 8 all adopt the straight-tube shape pipe, and therefore, its length requirement is: L＞22000 л R * R/ ρ, and wherein ρ is an electrical conductivity of water, R is half of first water pipe 7 or second water pipe, 8 internal diameters.
The above-mentioned conductive part 10 cylindrical metal pipe between second water pipe, 8 body inside and outside walls that is formed in one, ground wire connections 11 which is provided with groove for to be the one-body molded annular element at second pipe outer wall of setting-in state.
Above-mentioned connecting portion 9 is for passing through the one-body molded nipple in second water pipe, 8 ends of embedding and injection molding, and first water pipe, 7 ends are provided with the internal thread screw adaptive with this nipple.
The function of three-dimensional electricity guard wall is achieved in that when ground wire is good in the present embodiment; the electric leakage of generation water heater; leakage current is transmitted to the metallic conduction parts by current; the metallic conduction parts flow to the earth through ground wire again; ground wire opens protective effect; any electrical equipment user can not come to harm, and this device does not have any negative interaction yet.
When the ground wire sky connect or condition of poor under, the electric leakage of generation water heater, user to this water heater, leakage current will be through first water pipe and two anticreep isolation strip of second water pipe, because the protective current of each anticreep isolation strip all meets the GB requirement, therefore, this water heater user's that flows through electric current is half that GB requires, and the user can not be subjected to any injury; Electrical equipment user to other electrical equipment user of connecting this ground wire and other user, leakage current has at first passed through first water pipe, just flow to ground wire through the metallic conduction parts then, this electric current meets the GB requirement, can other electrical equipment user who connect this ground wire not caused any harm.
When the ground wire sky connect or condition of poor under; in when, other electrical leakage taking place causing ground wire electrification; leakage current is transmitted to the metallic conduction parts of safety guard through ground wire; cause the water in the protective device charged through the metallic conduction parts; but this leakage current is understood through second water pipe before flowing out water heater, thereby guarantees that the water heater user can not come to harm.
Embodiment two
As shown in Figure 4, and with reference to Fig. 1～Fig. 3, as seen it is basic identical that present embodiment has the electric heater and the embodiment one of three-dimensional electricity guard wall function, difference only is: first water pipe 7 is the cylindric insulation body of end sealing, connecting portion 9 has the cylindric of through hole 91 for sidewall, the blind end that this connecting portion 9 is positioned at first water pipe 7 and an end and first water pipe 7 is tightly connected, and the other end is communicated with second water pipe, 8 sealings of stretching into first water pipe 7.In the present embodiment, first water pipe 7 and second water pipe 8 all adopt the straight-tube shape pipe, and therefore, the length requirement of first water pipe 7 is: L
1＞22000 л (R
3* R
3-R
2* R
2)/ρ, the length requirement of second water pipe 8 is: L
2＞22000 л R
1* R
1/ ρ, wherein ρ is an electrical conductivity of water, R
1Be half of the second water pipe internal diameter, R
2Be half of the second water pipe external diameter, R
3Be half of the first water pipe internal diameter.
Claims (9)
1. electric heater with three-dimensional electricity guard wall function, comprise housing, earth connection and be provided with water inlet and the inner bag of delivery port, it is characterized in that one in described water inlet and the delivery port is sealedly connected with safety guard, another is sealedly connected with and adds long water pipe or described safety guard; Wherein, described safety guard comprises that metallic conduction parts and two tube walls that are communicated with in turn are first water pipe and second water pipe of insulating materials, these metallic conduction parts only keep in touch with current by wherein in the junction of described first water pipe and second water pipe, and described earth connection is electrically connected with these metallic conduction parts; And, electric current by described add long water pipe, electric current by described first water pipe and the electric current current strength after by the current in described second water pipe all less than 5mA.
2. electric heater according to claim 1 is characterized in that described water inlet and described delivery port all are sealedly connected with described safety guard.
3. electric heater according to claim 1, it is characterized in that described metallic conduction parts comprise the connecting portion that keeps in touch with current, are embedded in the conductive part of the described second water pipe body inside and are located at the ground wire connections that is connected with earth connection on the described second water pipe body, the two ends of conductive part connect described connecting portion and ground wire connections respectively.
4. electric heater according to claim 3, it is cylindric to it is characterized in that described first water pipe, second water pipe and connecting portion are, and an end of connecting portion is communicated with described second water pipe sealing, and the other end is communicated with described first water pipe sealing.
5. electric heater according to claim 3, it is characterized in that described first water pipe is the cylindric insulation body of end sealing, described connecting portion is that sidewall has the cylindric of through hole, this connecting portion in described first water pipe and the blind end of an end and first water pipe be tightly connected, the other end is communicated with second water pipe sealing of stretching into first water pipe.
6. according to claim 3 or 4 or 5 described electric heaters, it is characterized in that be formed in one conductor wire between the described second water pipe body inside and outside wall of described conductive part.
7. according to claim 3 or 4 or 5 described electric heaters, it is characterized in that be formed in one cylindrical metal pipe between the described second water pipe body inside and outside wall of described conductive part.
8. according to claim 3 or 4 or 5 described electric heaters, it is characterized in that described ground wire connections is to be the one-body molded annular element at described second pipe outer wall of setting-in state, which is provided with groove.
9. according to claim 4 or 5 described electric heaters, it is characterized in that described connecting portion for passing through the one-body molded nipple in the described second water pipe end of embedding and injection molding, the described first water pipe end is provided with the internal thread screw adaptive with this nipple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100624531A CN101294745B (en) | 2008-06-11 | 2008-06-11 | Electric water heater with three-dimensional electricity guard wall function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100624531A CN101294745B (en) | 2008-06-11 | 2008-06-11 | Electric water heater with three-dimensional electricity guard wall function |
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| Publication Number | Publication Date |
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| CN101294745A CN101294745A (en) | 2008-10-29 |
| CN101294745B true CN101294745B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100624531A Active CN101294745B (en) | 2008-06-11 | 2008-06-11 | Electric water heater with three-dimensional electricity guard wall function |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102192598B (en) * | 2011-05-10 | 2013-06-19 | 宁波方太厨具有限公司 | Three-way electricity guard wall structure and manufacturing method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055593A (en) * | 1990-04-04 | 1991-10-23 | 上海华升电热器厂 | Quick electrothermal-film water boiler |
| CN2591520Y (en) * | 2002-12-20 | 2003-12-10 | 浙江康泉电器有限公司 | Electric water heater with omnibearing electricity leakage protection function |
| CN2643217Y (en) * | 2003-08-13 | 2004-09-22 | 赵海 | Electric water heater with leakage absorbing and alarm units |
| CN1825023A (en) * | 2006-03-27 | 2006-08-30 | 艾欧史密斯(中国)热水器有限公司 | Flow-limiting safety electric water heater |
| CN2884040Y (en) * | 2006-04-10 | 2007-03-28 | 李光华 | External placed sleeve-type shock-proof wall for electric water-heater |
| CN2906455Y (en) * | 2004-05-12 | 2007-05-30 | 欧阳优凡 | Forward and reverse current-leakage display and protection type electric water heater |
| CN201045535Y (en) * | 2007-06-01 | 2008-04-09 | 陈及安 | Bare electric instant heating water heater |
-
2008
- 2008-06-11 CN CN2008100624531A patent/CN101294745B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1055593A (en) * | 1990-04-04 | 1991-10-23 | 上海华升电热器厂 | Quick electrothermal-film water boiler |
| CN2591520Y (en) * | 2002-12-20 | 2003-12-10 | 浙江康泉电器有限公司 | Electric water heater with omnibearing electricity leakage protection function |
| CN2643217Y (en) * | 2003-08-13 | 2004-09-22 | 赵海 | Electric water heater with leakage absorbing and alarm units |
| CN2906455Y (en) * | 2004-05-12 | 2007-05-30 | 欧阳优凡 | Forward and reverse current-leakage display and protection type electric water heater |
| CN1825023A (en) * | 2006-03-27 | 2006-08-30 | 艾欧史密斯(中国)热水器有限公司 | Flow-limiting safety electric water heater |
| CN2884040Y (en) * | 2006-04-10 | 2007-03-28 | 李光华 | External placed sleeve-type shock-proof wall for electric water-heater |
| CN201045535Y (en) * | 2007-06-01 | 2008-04-09 | 陈及安 | Bare electric instant heating water heater |
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| CN101294745A (en) | 2008-10-29 |
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