CN2304221Y - Electric heating element - Google Patents
Electric heating element Download PDFInfo
- Publication number
- CN2304221Y CN2304221Y CN 97235952 CN97235952U CN2304221Y CN 2304221 Y CN2304221 Y CN 2304221Y CN 97235952 CN97235952 CN 97235952 CN 97235952 U CN97235952 U CN 97235952U CN 2304221 Y CN2304221 Y CN 2304221Y
- Authority
- CN
- China
- Prior art keywords
- electric heating
- heating
- heat exchanger
- tube
- heating tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an electric heating element, which is composed of an electric heating tube and a metal heat exchange plate, and the electric heating tube comprises a metal case. The heat exchange plate and the surface of the electric heating tube are provided with a tight fit contact surface. The further improvement of the utility model is that the heat exchange plate is covered by a section of metal heating tube to form a heating chamber, and the upper side of the heating chamber is provided with at least two holes to form convection.
Description
The utility model relates to a kind of structure and design of electric heating device, relates in particular to the electric heating device of water heating and the manufacturing of heater thereof.
The water heating apparatus that in all trades and professions and daily life, often uses and run into, for example domestic, electric water heater, electric hot water bottle, insulating pot, more be unit, transportation department, the used boiler in public place, also can be used for the water of industry and the electric heating equipment of other liquid etc.Because the efficient of electric heating conversion is very high, do not add to consider how further to improve the problem of the efficiency of heating surface of electrical heating elements usually.At present, electrical heating elements is to the main element in the electric heating equipment of water and other liquid heat.The most frequently used electrical heating elements is generally the electric heating tube of metal shell, the shape of electric heating tube has straight tube shape, U-shaped is tubular, spirally coiled or the like, constitute by following structure: be provided with resistance electroheating type heater in metal shell inside, between heater and metal shell, fill the nonmetal heatproof material that conducts heat and insulate, commonly used is magnesium oxide, silicon dioxide etc., this type of electrical heating elements is immersed in the liquid when work, the temperature of heater is at 1100-1600 degree centigrade, the actual metal surface that is transmitted in the liquid also has quite high temperature, the temperature difference between metal surface and the liquid and the size of metal surface area can roughly determine electrically heated efficient, it is general because the surface area of electric heating tube is too small, the vaporization of water can be lost a lot of heats when water temperature reaches more than 40 degrees centigrade, in addition because along with the rising of the temperature of water or liquid, water in heating container or other are heated the thermal convection efficient of liquid and also dislike low, also have influence on the heating efficiency of electrical heating elements, prolonged heating time.In order to improve the efficient of electric heating components and parts, on metal outer pipe, to make heat exchanging fin a kind of selection of also can yet be regarded as, but will make the electric heating components and parts that share and be not easy, its technology cost is too high.
The purpose of this utility model provides a kind of electric heating device that can improve the efficiency of heating surface greatly, especially can overcome the difficulty of technology and cost aspect, making can be adapted to the electric heating device of various electricallly heated water boiling vessels, water heater, and other purpose of the present utility model is listed in specification in addition.
The purpose of this utility model is achieved in that and it is characterized in that comprising that the electric heating tube of metal shell and metal fever power board constitute that there is the tight fit contact-making surface on described heat exchanger plate and electric heating tube surface.
Further improvement of the utility model is that described heat exchanger plate surrounds one section immerging metal tube heater, constitutes heating chamber, is provided with two holes at least to form convection current on heating chamber.
The utlity model has following characteristics: owing to increased the heat exchange area of heating tube, most electric heating hot water apparatuss for present use, all the balance of more optimizing at the heating tube of whole heating-up temperature scope be heated the temperature difference between the liquid, thereby improved electrical heating efficiency, application on insulating pot shows, can save energy more than 5%, if use the heating chamber device, the thermal convection efficient that water in heating container or other are heated liquid improves greatly, the heating efficiency of electrical heating elements is better, shortened heating time, the heater element electrical heating efficiency is higher, overcome the state of thermal resistance, saves energy reaches 8-15%, can also prolong the useful life of heating element.The utility model is when being heated to water temperature more than 50 degrees centigrade, obviously water is forced to thermal convection as can be seen, and when higher temperature, the stirring of water and convection current impact phenomenon are more obvious, the contrast experiment show this moment programming rate obviously accelerate, electrical heating efficiency obviously improves.
The utility model is used at all trades and professions and the frequent water heating apparatus that uses of daily life, for example domestic, electric water heater, electric hot water bottle, insulating pot, the boiler that uses on enterprise, public institution, vehicle, the motor vessel also can be used for the water of industry and electric heating equipment of other liquid or the like.
The utility model is described in further detail below in conjunction with accompanying drawing with by embodiment:
Fig. 1 is used for the embodiment schematic diagram of metallic disc-shaped electric heating tube for the utility model, and has provided broken section
Fig. 2 is used for the embodiment schematic diagram of straight tube shape metal electric heating tube for the utility model, and has provided broken section
About the embodiment of tight fit contact-making surface is arranged on heat exchanger plate and electric heating tube surface, can in following proposal, select: the heat exchanger plate of generally making band projection or fin shape with sheet metal such as aluminium, copper, iron or good thermal conductive material, the heat exchanger plate of band projection or fin tightly clads electric heating tube again, also can spot welding etc. mode make heat exchanger plate and heating tube affixed.Also can be enclosed in the heat exchanging fin of fin shape heating tube around.
As shown in the figure, convexing to form of making of sheet metal surrounded one section or whole heating chambers of immerging metal tube heaters, heating chamber itself has the effect of heat exchanging fin again, bossing and the selection dimensionally of the section of adding chamber will be considered the volume of whole heating container and the power of heating tube, general projection and heating chamber are directly proportional with the power of heater in size, if for power more than the 1000W, volume for the insulating pot below 10 liters, the size of heating chamber should be greater than 10cm2.For the embodiment of Fig. 1, heating chamber encases metal tube dimensionally entirely also fabulous effect, electric heating tube 1 is a dish type, 2 is the extraction electrode of electric heating tube, heating chamber is covered by metallic plate 3,4 up and down and constitutes and surround whole heating tube, be provided with the holding tank 5,7 of projection in the contact site of upper and lower metallic plate and heating tube, be provided with protruding holding tank or grip block more than 2 at whole heating tube circumference.On heating chamber, be provided with two holes at least, be convenient to the circulation of heating liquid, the aperture of heating chamber is generally 1-8mm, the course of work of heating chamber is as following: the temperature of liquid of heating chamber all be higher than the temperature of other regional liquid, the size in appropriate design aperture, make that the temperature difference owing to liquid has good thermal convection power when uniform temperature, in the time of 50-80 degree centigrade, can see rolling better of liquid by naked eyes.The metal top cover plate can be made hemisphere jut.
In the embodiment in figure 1, the shape of cover plate also can with each heating chamber of circular formation up and down.
Among the embodiment shown in Figure 2, on all four structure is arranged, but be provided with balancing hole 10 in the clamping convex surfaces that forms heating chamber with Fig. 1.
Should be equipped with the hole at position up and down to the selection of the position in the aperture of heating chamber and hole, so that form the stirring and the forced convertion efficiently of current.
Claims (5)
1. an electric heating device is characterized in that comprising that the electric heating tube of metal shell and heat exchanger plate constitute, and there is the tight fit contact-making surface on described heat exchanger plate and electric heating tube surface.
2. by the described electric heating device of claim 1, it is characterized in that described heat exchanger plate surrounds one section immerging metal tube heater, constitute heating chamber, on heating chamber, be provided with two holes at least to form convection current.
3. by the described electric heating device of claim 2, it is characterized in that described heat exchanger plate surrounds whole immerging metal tube heaters.
4. by the described electric heating device of claim 3, it is characterized in that being provided with protruding holding tank or grip block more than 2 at whole heating tube circumference.
5. by the described electric heating device of claim 1, it is characterized in that heat exchanging fin with projection in the heat exchanger plate or fin shape be enclosed in heating tube around.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97235952 CN2304221Y (en) | 1997-05-06 | 1997-05-06 | Electric heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97235952 CN2304221Y (en) | 1997-05-06 | 1997-05-06 | Electric heating element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2304221Y true CN2304221Y (en) | 1999-01-13 |
Family
ID=33946936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97235952 Expired - Fee Related CN2304221Y (en) | 1997-05-06 | 1997-05-06 | Electric heating element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2304221Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111494984A (en) * | 2020-04-29 | 2020-08-07 | 科思美碧优蒂化妆品(南通)有限公司 | Natural plant extraction system and method |
-
1997
- 1997-05-06 CN CN 97235952 patent/CN2304221Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111494984A (en) * | 2020-04-29 | 2020-08-07 | 科思美碧优蒂化妆品(南通)有限公司 | Natural plant extraction system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |