CN1330251A - Method and unit for preventing electric shock of electric water heater - Google Patents
Method and unit for preventing electric shock of electric water heater Download PDFInfo
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- CN1330251A CN1330251A CN 00113851 CN00113851A CN1330251A CN 1330251 A CN1330251 A CN 1330251A CN 00113851 CN00113851 CN 00113851 CN 00113851 A CN00113851 A CN 00113851A CN 1330251 A CN1330251 A CN 1330251A
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Abstract
A method and device for preventing electric shock of electric water heater features that an electrically insulating pipe made of electrically insulating material and with electric resistance greater than 1 Mohm is serially connected between water mixer and water inlet and outlet of water heater.
Description
The invention discloses a kind of electric shock prevention method and device of electric heater, belong to household electrical appliance technical field.
Existing electric heater, generally be by electrothermal tube or other electric heating method water to be heated to higher temperature from inflow temperature to convert to flow out for the people after closing through hot and cold water and use in metal water drum, the cold water that is made of metal, hot water adapter directly are welded on the water drum usually.According to standard code, metal materials such as water drum, outer cover, Inlet and outlet water adapter must link to each other with the earth connection in the power line, and the earth connection in the power line links to each other with the earth through socket, and ground connection must be reliable.In normal use, the ground wire no current.When electric leakage took place water heater contingency, electric current flowed directly into the earth by low-resistance ground wire, thereby guaranteed human body safety.
In fact, because historical reasons, a big chunk of the existing house of China is not installed good earthing or grounding means when building originally.In addition, also have some sockets, or often plug and unplug and cause the socket loose contact, tend to cause the empty phenomenon of inserting of ground wire during use owing to design, produce lack of standardizationly.Like this when water heater just in case when electric leakage took place, high voltage then may spread out of through conductor materials such as entery and delivery port or cases human body is caused electric shock, this situation all has generation every year.
Purpose of the present invention is exactly electric shock prevention method and the device that a kind of electric heater will be provided, use this method and device unreliable or do not have ground wire and also can prevent the generation of electric shock accidents under the condition that water heater leaks electricity electric heater ground connection, thereby guarantee human body safety, overcome existing electric heater above shortcomings on problem safe in utilization.
Below with reference to accompanying drawing technical scheme of the present invention is described.
Accompanying drawing 1 is by the made anti-electric shock apparatus of method of the present invention and the catenation principle schematic diagram of electric heater.
Accompanying drawing 2 is by the made schematic diagram of anti-electric shock apparatus when making individual layer around tubular structure of method of the present invention.
Accompanying drawing 3 is by the made schematic diagram of anti-electric shock apparatus when making individual layer helical form injection moulding idol part structure of method of the present invention.
Being described as follows of each symbol among the figure:
1-electric heater main frame water-in and water-out joint, 2-anti-electric shock apparatus, 3-electric heater water-in and water-out register, 4-water-in and water-out joint, 5-shell, 6-electric insulation aquaporin, 7-electric insulating medium, 8-water-in and water-out joint, 9-overcoat, 10-inner core.Arrow is represented water (flow) direction among the figure.With reference to accompanying drawing, the technical scheme of the electric shock prevention method of a kind of electric heater of the present invention is: between electric heater main frame water-in and water-out joints [1] and electric heater water-in and water-out register [3], the anti-electric shock apparatus [2] of connecting respectively, it is less in the anti-electric shock apparatus [2] transversal flow area to be housed, length is longer, the electric insulation aquaporin of making by electrically insulating material [6], the transversal flow area of electric insulation aquaporin [6] and the proportioning of length, should satisfy in electric insulation aquaporin [6], be full of running water after, the resistance value at two ends is greater than a megaohm; The current journey is to enter the electric heater main frame again behind the cold running water process electric insulation aquaporin [6]; The hot water that comes out from the electric heater main frame enters electric heater water-in and water-out register [3] behind the process electric insulation aquaporin [6] earlier again.
Adopt technique scheme, when unreliable, if electric heater is just in case leak electricity, leakage current can only be by the outflow of the water in the electric insulation aquaporin [6] ground wire grounded.Because resistance value is more than 1 megaohm behind electric insulation aquaporin [6] water-filling, and the human body resistance value is about 0.2 megaohm, according to the series circuit Ohm's law as can be known, even leakage voltage is 220 volts, the voltage that acts on human body also has only about 220 volts sixth, be lower than safe voltage, therefore can not cause electric shock the people.Thereby it is unreliable or do not have ground wire and just in case when electric leakage takes place, also can not cause human injury's purpose ground connection to have realized.
According to the technical scheme of the inventive method, as the resistance value of electric insulation aquaporin [6] is set in 5 megaohms, then be no more than 10 volts just in case act on the maximum voltage of human body during electric leakage.
Under the normal temperature, resistivity of water is about 5000 Europe centimetre from the beginning, is full of as setting electric insulation aquaporin [6] that the resistance value at two ends is 1 megaohm behind the water, and when electric insulation aquaporin [6] is made circle, when internal diameter was Φ 6, its length was about 0.6 meter; When internal diameter was Φ 8, its length was about 1 meter, and when internal diameter was Φ 10, its length was about 1.5 meters.The resistance value of considering two ends behind the water-filling is taken into account the resistance to water-flow characteristic simultaneously greater than 1 megaohm, and the transversal flow area of electric insulation aquaporin [6] is with 0.1～0.8cm
2Be advisable, length of run is advisable to be not more than 4 meters.
The anti-electric shock apparatus of making according to the method for the invention, form by shell [5], electric insulation aquaporin [6], water-in and water-out joint and electric insulating medium etc., when each element is made as separate structure, electric insulation aquaporin [6] is coiled in the housing [5] that electrically insulating material is made with the form of single or multiple lift by the flexible plastic pipe with electrical insulation capability, rubber tube, thermoplastic hard plastic tube etc., and two connects water-in and water-out joint [4], [8] respectively; Gap between housing [5] and the electric insulation aquaporin [6] is full of resin with electrical insulation capability, quartz sand, crystal magnesium oxide etc.; When each element is made combining structure, electric insulation shell [5], electric insulation aquaporin [6] and water-in and water-out joint [4], [8] can merge, directly form the helical form of the single or multiple lift shown in the accompanying drawing 3 in the injection moulding mode, the overcoat [9] and the inner core [10] of the mutual coupling of coiling shape or labyrinth shape structure, the overcoat [9] of coupling and inner core [10] forms adjacent close isolated edge again through methods such as bonding, hot pressing, welding electric insulation aquaporin mutually.
For reducing volume, two anti-electric shock apparatus can merge makes the composite construction that unites two into one.
Claims (4)
1, a kind of electric shock prevention method of electric heater, it is characterized in that the anti-electric shock apparatus [2] of between electric heater main frame water-in and water-out joints [1] and electric heater water-in and water-out register [3], connecting respectively, it is less in the anti-electric shock apparatus [2] transversal flow area to be housed, length is longer, the electric insulation aquaporin of making by electrically insulating material [6], the transversal flow area of electric insulation aquaporin [6] and the proportioning of length, should satisfy in electric insulation aquaporin [6], be full of running water after, the resistance value at two ends is greater than a megaohm; The current journey is to enter the electric heater main frame again behind the cold running water process electric insulation aquaporin [6]; The hot water that comes out from the electric heater main frame enters electric heater water-in and water-out register [3] behind the process electric insulation aquaporin [6] earlier again.
2, by the electric shock prevention method of the described a kind of electric heater of claim 1, the transversal flow area that it is characterized in that electric insulation aquaporin [6] is with 0.1～0.8cm
2Be advisable, length of run is not to be advisable in 4 meters.
3, the anti-electric shock apparatus of making by the electric shock prevention method of the described a kind of electric heater of claim 1, it is characterized in that by shell [5], electric insulation aquaporin [6], advance, composition such as water out adapter and electric insulating medium, when each element is made as separate structure, electric insulation aquaporin [6] is by the flexible plastic pipe with electrical insulation capability, rubber tube, thermoplastic hard plastic tube etc. coils in the housing [5] that electrically insulating material is made with the form of single or multiple lift, two connects respectively into, water out adapter [4], [8], gap between housing [5] and the electric insulation aquaporin [6] is full of the resin with electrical insulation capability, quartz sand, crystal magnesium oxide etc.; When each element is made combining structure, electric insulation shell [5], electric insulation aquaporin [6] and water-in and water-out joint [4], [8] can merge, directly form the helical form of single or multiple lift in the injection moulding mode, the overcoat [9] and the inner core [10] of the mutual coupling of coiling shape or labyrinth shape structure, the overcoat [9] of coupling and inner core [10] forms adjacent close isolated edge again through methods such as bonding, hot pressing, welding electric insulation aquaporin mutually.
4,, it is characterized in that two anti-electric shock apparatus can merge to make the composite construction that unites two into one by the anti-electric shock apparatus of the described a kind of electric heater of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00113851 CN1330251A (en) | 2000-06-21 | 2000-06-21 | Method and unit for preventing electric shock of electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00113851 CN1330251A (en) | 2000-06-21 | 2000-06-21 | Method and unit for preventing electric shock of electric water heater |
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| Publication Number | Publication Date |
|---|---|
| CN1330251A true CN1330251A (en) | 2002-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00113851 Pending CN1330251A (en) | 2000-06-21 | 2000-06-21 | Method and unit for preventing electric shock of electric water heater |
Country Status (1)
| Country | Link |
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| CN (1) | CN1330251A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400980C (en) * | 2005-12-14 | 2008-07-09 | 欧永源 | Anti-electric shock type electric water heater |
| CN101957051A (en) * | 2010-05-18 | 2011-01-26 | 周剑冰 | Electric water heater |
-
2000
- 2000-06-21 CN CN 00113851 patent/CN1330251A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400980C (en) * | 2005-12-14 | 2008-07-09 | 欧永源 | Anti-electric shock type electric water heater |
| CN101957051A (en) * | 2010-05-18 | 2011-01-26 | 周剑冰 | Electric water heater |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |