The present invention relates to an electric radiator, especially to an electric radiator filled with oil which uses the electric heating components to heat up the fluid medium such as mineral oil.
Electric radiators filled with oil are more and more popular among the consumers with its advantages such as environment protection, cleanness and non-pollution. However, in the prior art, the radiating fins of all kinds of the electric radiators filled with oil are straight-lined. The straight lined fins, in spite of convenience for processing and assembly, still have the following disadvantages:
1. It makes against the pervasion of heat into the surrounding air because the heat emitted by the radiating fins will directly rise into the air so that the warming effect is not good enough.
2. It is hard to reasonably make spaces for the installation of the accessories such as the fan and humidifier. If these accessories were installed, on one hand, the whole product would be too large in bulk to cause inconvenience for transportation and use, and on the other hand, lead to waste of spaces.
3. The heat radiating effect is not good, while the quantity of the radiating fins is fixed, the maximum power of the electrothermal wires that can be installed would be restricted. Accordingly, the places this kind of electric radiator can be used are limited.
The Utility Model Patent CN2536943 authorized by the State Intellectual Property Office of P.R.C. on Feb. 19, 2003, disclosed a new type of electric radiator filled with oil, it includes a heat tube, a plurality of connecting sleeves and radiating fins and a controlling box, the connecting sleeves link the radiating fins and the controlling box, the heat tube immerges into the heat-conducting oil contained in the oil-filled radiating fins, wherein the radiating fin which adjacent to the controlling box is not filled with oil so it can help to insulate the heat to a certain extent, thus lowering the internal temperature of the controlling box and prolonging the lifespan of the electric radiator. Although this electric radiator filled with oil is more technically advanced than the existing technologies, it still has the above-mentioned disadvantages since its fins are straight-lined.
The purpose of present invention is to overcome the disadvantages of above-mentioned prior art, and to provide an improved electric radiator filled with oil, in which not only is the heat easy to radiate with a resulting good warming effect; but also the spaces of the whole product can be better utilized, the accessories such as the fan and humidifier can be installed without enlarging the bulk of the product too much. Furthermore, greater power electrothermal wires can be chosen while the quantity of the radiating fins is fixed due to good radiating effect, so it can be used in more places.
The improved electric radiator filled with oil according to the present invention comprises a plurality of radiating fins which are linked in turn, each of the radiating fins is hollow and sheet-like with at least two grooves therein for leading oil, the upper and lower ends of each radiating fin is formed or mounted with hollow connecting sleeves extended horizontally, and oil-inflow holes are formed inside the connecting sleeves; each of the radiating fins is communicated with the oil-inflow hole and is filled with oil; an electric-control box mounted on the radiating fins, in which a switch, a temperature controller, a heat protector and a wire are provided; a heater is located inside of the radiating fins; either the upper and lower ends of each radiating fin are in the different vertical planes, or the upper and lower ends of each radiating fin are in a same vertical plane, but at least a part of the middle of which is curved to form a convex configuration towards the side, each of the radiating fins has the same shape and dimension.
The improved electric radiator filled with oil according to the present invention still has following pertaining technical characteristics.
In a preferred embodiment of this invention, the upper and lower ends of each radiating fins are in the different vertical planes and are connected by a curved portion, the curved portion includes two folds which are reversed to each other in direction; the two folds, with equal radius and length of the arc, are circular-arc in shape, the radius R of which is not less than 15 mm and the central angle α of which ranges between 30° and 60°; the lengths of the upper end and the lower end of each radiating fin are equal, the ratio of this length to the height of the curve portion ranges between 1:1 and 5:1.
In another preferred embodiment of this invention, the upper and lower ends of each radiating fin are in a same vertical plane and are connected by a curved portion, the curved portion includes a middle fold and two end folds which are at two ends of the middle fold, the two end folds have the same direction which is reverse to the direction of the middle fold; both the middle fold and end folds are circular-arc in shape, the radius R1 of the middle fold ranges between 80 mm and 100 mm with the central angle ranging between 40° and 70°; the radius R2 of the end folds ranges between 15 mm and 30 mm with the central angle ranging from 30° to 50°; the length of the upper end and the lower end are equal, the ratio of this length to the height of the curved portion ranges between 1:1 to 0.2:1.
The electric-control box is installed on the leftmost radiating fin, a back cover is installed on the rightmost radiating fin, both the electric-control box and the back cover are provided with holes for radiating heat; wheels are installed at the bottom of the radiating fins.
The improved electric radiator filled with oil according to the present invention has the following advantages compared with the prior art: First, as each radiating fin has a curved structure in the longitudinal section direction, the heat can radiate along the curved portion with a better convection with the surrounding air, thus the environment temperature can be risen soon with a good warming effect; Correspondingly, compared with the straight lined fins in the prior art, the electrothermal wires with greater power can be chosen under the equal conditions, hence broaden the purposes and the places which can be used; Second, the hollow section formed by the curved structure makes space to install other accessories, with reasonable arrangement, the accessories such as the humidifier, the fan and the timer, etc. can be installed without expanding the bulk of the whole product too much, thus saving space and facilitating transportation and use.
In below the present invention will be explained detailed accompanying preferred embodiments which are shown in attached drawings.
Referring to
As shown in
The present invention mainly improves the geometrical shape of the fins 1. In the electric radiator filled with oil according to the present invention, either the upper and lower ends of each fins 1 are in the different vertical planes, or the upper and lower ends of each fin 1 are in a same vertical plane, but at least a part of the middle of the fin 1 is curved to form a convex configuration towards the side. It means that the fin 1 has a curved structure in the longitudinal section direction. Each of the fins 1 has the same shape and dimension, which means that the direction and extent of the curve of each fin in the electric radiator are the same. As shown in
As shown in
In above-mentioned embodiments, both of the two folds 151,152 are circular-arc in shape with equal radius and length of arc, the radius R of the folds are not less than 15 mm with its central angle α ranging between 30° and 60°. The lengths of the upper end 13 and the lower end 14 of each fin 1 are equal as L, the ratio of L to L1, the height of the curve portion 15, is between 1:1 and 5:1. Fins which meet the above size range can be easily produced, furthermore the sufficient intensity and stiffness of the whole fin 1 can be ensured and without causing stress concentration, it also helps to ensure that the welding lines are well airproof as the fin is welded by two suited halves, thus preventing the leak of the liquid oil contained in oil grooves 10 of the fin 1. Note that: because the fin 1 has a certain thickness, R, the radius of the two folds 151, 152, refers to the radius at the middle line of the thickness plane of the fin (see
As shown in
In the above-mentioned preferred embodiments, both the middle fold 153 and the end folds 154 are circular-arc in shape. R1, the radius of middle fold 153, is between 80 mm and 100 mm with the central angle β1 ranging between 40° and 70°; R2, the radius of end folds 154, is between 15 mm and 30 mm with the central angle β1 ranging between 30° and 50°. The lengths of the upper end 13 and the lower end 14 of each fin 1 are equal. The ratio of this length to the height of the curve portion 15 is between 1:1 and 0.2:1. Fins which meet the above size range can be easily produced, furthermore the sufficient intensity and stiffness of the whole fin 1 can be ensured and without causing stress concentration, it also helps to ensure that the welding lines are well airproof as the fin is welded by two suited halves, thus preventing the leak of the liquid oil contained in oil grooves 10 of the fin 1. As explained above, the radius of the middle fold 153 and the end folds 154, refers to the radius at the middle line of the thick plane of fin 1, the height of the upper end 13 and the lower end 14 refers to the distance between the end (top or bottom) and the tangent points on the end folds 154.
All of the above embodiments are used to explain the invention only, and not to limit the interpretation of this invention. It will be understood by those skilled in the art that various changes in form and details are possible without departing from the spirit and scope of the present invention, for example curve the fins to other shapes, hence all the equivalent schemes are in the scope of the present invention.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/CN2004/001439 | 12/13/2004 | WO | 00 | 4/24/2006 |
Publishing Document | Publishing Date | Country | Kind |
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WO2006/026897 | 3/16/2006 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
3916151 | Reix | Oct 1975 | A |
4950871 | Pollak et al. | Aug 1990 | A |
6169851 | Naughton et al. | Jan 2001 | B1 |
Number | Date | Country |
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2536943Y | Feb 2003 | CN |
2672541Y | Jan 2005 | CN |
199911037486 | Feb 1999 | JP |
199911311489 | Nov 1999 | JP |
Number | Date | Country | |
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20070065123 A1 | Mar 2007 | US |