KR100833253B1 - One kind of improved electrical heater filled with oil - Google Patents

Abstract

The oil-filled electric heater includes a plurality of heat dissipation fins, an electrical control box, and a heating element in the heat dissipation fins, which are equipped with a switch, a temperature controller, a heat protector and a wire. The heat radiation fin is in the form of a hollow plate, and two or more oil guide grooves are formed therein. Hollow connection sleeves are provided at the top and bottom of the heat dissipation fin, and an oil inlet is formed in the connection sleeve. Each heat sink fin communicates with the oil inlet and is filled with oil inside the heat sink fins. Both ends of the heat dissipation fins are located in different vertical planes or are bent to form a laterally convex structure in the same vertical plane but at least some of them. Each heat sink fin has the same shape and the same size.

Oil Rechargeable Electric Heater, Heat Sink

Description

Improved Oil Rechargeable Electric Heater {ONE KIND OF IMPROVED ELECTRICAL HEATER FILLED WITH OIL}

The present invention relates to an electric heater, and more particularly to an oil-filled electric heater for heating a fluid medium such as mineral oil with an electric heating component.

Oil-filled electric heaters are favored by more and more consumers due to their advantages such as being environmentally friendly, hygienic and pollution free. In the conventional oil-filled electric heater, all of the heat dissipation fins are straight fins, which are convenient for processing and assembly, but have the following disadvantages.

First, calories are less likely to dissipate into the surrounding air. That is, the heating element is radiated from the heat radiating fins rises directly into the air along the heat radiating fins, thereby reducing the heating effect.

Second, it is difficult to reasonably arrange a space for mounting other auxiliary devices such as a blower and a humidifier. When equipped with such an accessory, the overall volume of the product becomes large, which is not only inconvenient for transportation and use, but also waste of space.

Third, the heat radiation efficiency is low. Therefore, in a condition where the number of heat radiation fins is constant, the maximum power of the corresponding heating wire is limited, and the place of use is also limited.

A new oil-filled electric heater is disclosed in the utility model CN2536943, which was registered on February 19, 2003 by the China Intellectual Property Office. The product includes a heat dissipation pipe, a connection sleeve, a plurality of heat dissipation fins and a control box, by which the plurality of heat dissipation fins are connected to the control box, and the heat dissipation pipe is immersed in the heat conductive oil in the oil-filled heat dissipation fins. . Here, the heat dissipation fins connected to the control box are not filled with oil, and thus the heat dissipation fins have a heat shielding function to a certain degree, lowering the working temperature inside the control box, and extending the service life of the heater. Although the heater is somewhat advanced compared to the prior art, the above-mentioned disadvantages still exist because the heat radiation fins are still straight.

It is an object of the present invention to provide an oil-filled electric heater that has been improved to solve the disadvantages of the prior art described above. Electric heater according to the present invention is not only good heat dissipation heat dissipation to the surroundings, but also the additional device such as a humidifier, fan, etc. separately in a condition that the volume utilization of the whole product is not improved greatly increases the volume of the whole product Can be mounted. In addition, the heat dissipation effect is also good, under a constant number of heat dissipation fins, it is possible to use a higher power heating wire than the existing product, it is not limited to the place of use of the product.

The improved oil-filled electric heater according to the present invention includes a heat radiating fin sequentially connected, an electric control box mounted to the heat radiating fin, and a heating element inside the heat radiating fin. In the electrical control box, there is a switch, a temperature controller, a heat protector and a wire. The heat dissipation fin is in the form of a hollow plate, and two or more oil guide grooves are formed therein. Hollow connection sleeves extending in the horizontal direction are formed or mounted at upper and lower ends of the heat dissipation fins, and oil inlets are formed in the connection sleeves. The oil inlets of each of the heat sink fins are connected to each other, and oil is filled in the heat sink fins. The upper and lower ends of each of the heat dissipation fins are located in different vertical planes, or are located in the same vertical plane, but at least some of them are curved and protrude laterally. Each of the heat sink fins has the same shape and the same size.

The electric heater according to the present invention has the following technical features.

In a preferred embodiment according to the invention, the upper and lower ends of each of the heat radiation fins are located in different vertical planes, the upper and lower ends are connected to the curved portion, the curved portions are two having opposite directions It consists of four bends. The two curved portions are both arc-shaped, the radius of the curved portion is the same, and the arc length is also the same. The radius is at least 15 mm and the central angle is 30 to 60 degrees. The length of the upper section and the lower section of the heat dissipation fin is the same, and the height ratio of the upper section and the lower section and the curved portion is 1: 1 to 5: 1.

In another preferred embodiment according to the invention, the upper and lower ends of each of the heat dissipation fins are located in the same vertical plane, and both ends are connected to the curved portion. The curved portion includes one intermediate curved portion and end curved portions formed at both ends of the intermediate curved portion, and the two curved portions have the same bending direction and opposite to the curved direction of the intermediate curved portion. The intermediate curved portion and the end curved portion are both arc-shaped, the radius of the intermediate curved portion is 80 to 100 mm, the central angle is 40 to 70 degrees. The radius R2 of the end curved portion is 15 to 30 mm and the center angle is 30 to 50 degrees. The length of the upper section and the lower section of the heat dissipation fin is the same, and the height ratio of the upper section and the lower section and the curved portion is 1: 1 to 0.2: 1.

The electrical control box is mounted on the leftmost heat radiation fin, the rightmost heat radiation fin is provided with a rear cover, and both the electrical control box and the rear cover are formed with a heat radiation opening. A roller is mounted below the heat dissipation fins.

The oil-filled electric heater according to the present invention has the following advantages over the prior art. First, since each heat sink fin has a curved structure in the longitudinal cross-sectional direction, the hot air diffuses outward along the curved portion, and the convection effect with the surrounding air is good. Therefore, the temperature of the surrounding environment can be quickly increased, and the heating effect is excellent. Correspondingly, since the heat quantity of the heat radiation fins can be quickly dissipated and diffused, the use of evenly improved heating wires can be used under the same conditions as compared with the conventional straight bar type heat radiation fins. Can be. Second, a space for installing other accessory devices is formed in the recess formed due to the curved configuration, so that a plurality of accessory devices such as a humidifier, a fan and a timer can be reasonably installed on the heat sink under conditions in which the volume of the entire product is not greatly increased. By arranging and mounting, space saving, transportation, and use convenience can be aimed at further.

1 is an overall configuration diagram of an oil-filled electric heater according to the present invention, which shows, in partial cross-sectional view, components such as a heating element, an oil induction groove, and the like.

FIG. 2 is an exploded perspective view of the oil-filled electric heater shown in FIG. 1, showing each component of the electric heater and each device in the electrical control box.

Figure 3 is a front view of the heat dissipation fin in one preferred embodiment of the oil-filled electric heater according to the present invention, the heat dissipation fin is formed in a similar shape to the "S".

FIG. 4 is a left side view of FIG. 3, illustrating a planar structure of the heat dissipation fin and distribution of an oil guide groove.

FIG. 5 illustrates another embodiment of the heat dissipation fin shown in FIG. 3, wherein the heat dissipation fin has a curved direction opposite to that of the embodiment shown in FIG.

6 is a front view of the heat dissipation fin of another embodiment of the oil-filled electric heater according to the present invention, wherein the heat dissipation fin is formed in a "C" shape.

FIG. 7 is another embodiment of the heat dissipation fin shown in FIG. 6, and the curved direction of the heat dissipation fin is opposite to the curved direction of the embodiment shown in FIG. 6.

Referring to FIG. 1, an improved oil-filled electric heater according to the present invention is mounted inside a plurality of heat dissipation fins 1, electrical control boxes 2 mounted on the heat dissipation fins 1, and heat dissipation fins 1 which are sequentially connected. And a heating element 3, as shown in the drawing, the heating element 3 is a heat transfer pipe. The electrical control box 2 is mounted to the leftmost heat dissipation fin 1, and the rightmost heat dissipation fin 1 is mounted to the rear cover 4. Both the electrical control box 2 and the rear cover 4 are formed with a heat dissipation opening 100. The heat generating body generated from the heat dissipation fin 1 is emitted to the outside through the heat dissipation opening 100 on both sides. As shown in the figure, the roller 5 is mounted to the lower portion of the heat dissipation fin 1, the roller 5 may have a variety of forms. The rollers make the transport and use of the electric heater more convenient.

As shown in FIG. 2, a switch 21, a temperature controller 22, a heat protector 23 and a wire 24 are mounted in the electric control box 2. The wire 24 is used for power connection, the switch 21 includes a power switch and a temperature controlled rotary button, and the temperature controlled rotary button is used to control the working temperature of the electric heater. The temperature controller 22 serves to maintain a constant temperature of the heat radiating fins. The thermal protector 23 protects from overheating and automatically cuts off the power when the temperature is in an abnormal operating state exceeding a set value. Since this configuration is a known technique, it will not be described any more. The heat dissipation fin 1 is in the form of a hollow plate, and there are two or more oil guide grooves 10 therein. The upper and lower ends of the heat dissipation fins 1 are formed or mounted in a hollow connection sleeve 11 extending in a horizontal direction, and an oil inlet 12 is formed in the connection sleeve 11. The oil inlets 12 of each of the heat radiation fins 1 are connected to each other, and oil is filled in the heat radiation fins 1. Each heat radiation fin 1 is formed by welding two parts. The connecting sleeve 11 of each heat sink fin 1 is integrally welded to form a heat sink fin assembly.

The present invention mainly improves the geometry of the heat radiation fin (11). In the oil-filled electric heater according to the present invention, the upper and lower sections of each of the heat radiating fins 1 are located in different vertical planes, or in the same vertical plane, but at least a part of them is curved in the middle. It protrudes laterally. That is, the heat radiation fin 1 has a curved structure with respect to the longitudinal cross-sectional direction. Each of the heat dissipation fins 1 has the same shape and the same size. Herein, the same shape and size mean that the heat dissipation fins of the electric heater are curved or bent in the same direction and have the same width. For example, the upper and middle portions of each of the heat dissipation fins of the electric heater shown in FIG. 1 are all bent to the right, and the bent sizes are also the same. In this case, not only the overall shape of the electric heater is relatively good, but also the processing procedure of the heat radiating fin is simplified, and the cost of production is reduced.

As shown in Figures 3 and 5, in a preferred embodiment according to the present invention, the upper section 13 and the lower section 14 of each of the heat radiation fins 1 are in a different vertical plane from each other, the upper and lower sides The section is connected to one curved portion 15. The curved portion 15 includes two curved portions 151, 152 that are opposite in direction. Since the bending direction is different, it may specifically have two structural forms. In the form of the heat dissipation fin shown in FIG. 3, the middle upper portion of the heat dissipation fin 1 is bent to the left, and the longitudinal cross section has a form similar to the letter "S". The space formed by the lower left and the upper right of the heat dissipation fin may be used to mount a relatively large auxiliary device such as a humidifier. In the form of the heat dissipation fin shown in Fig. 5, the middle upper portion of the heat dissipation fin 1 is bent to the right, and the longitudinal cross section has a shape similar to the inverse " S " A relatively large auxiliary device can be mounted in the space formed on the upper left and lower right of the heat dissipation fin. Therefore, the space utilization rate is improved.

In the preferred embodiment, the two curved portions 151, 152 all have an arc shape, the radius of the curved portion is the same, and the length of the arc is also the same. The radius R is 15 mm or more, and the central angle α is 30 to 60 degrees. The lengths of the upper section 13 and the lower section 14 are equal to each other, and the ratio of the height L1 of the upper and lower both sections 13 and 14 and the curved portion 15 is 1: 1 to 5: 1. . The heat radiation fins corresponding to the size range is not only convenient to process, but also sufficient strength and rigidity of the entire heat radiation fin 1 can be ensured, and stress concentration can be prevented. Even after forming, the sealing property of the welded part is good, and the leakage of the liquid oil inside the oil guide groove 10 of the heat radiating fin 1 can be effectively prevented. It should be explained that, since the heat radiation fin 1 has a constant thickness, the radius R of the two curved portions 151 and 152 represents the radius of the center line in the thickness direction of the heat radiation fin 1 (FIG. 3). And FIG. 5). The length of the upper section 13 and the lower section 14 represents the length between the contact points with the curved portions 151 and 152 from the ends (upper or lower). In a preferred embodiment according to the invention, the radius R of the bends 151, 152 is 20 mm and the central angle α is 48 °. The ratio of the length L of the upper section 13 or the lower section 14 to the height L1 of the curved portion 15 is 3.5: 1.

6 and 7, in another preferred embodiment according to the present invention, the upper section 13 and the lower section 14 of each heat radiation fin 1 are in the same vertical plane, and the upper and lower both sections 13 and 14 are connected to the curved portion 15. The curved portion 15 includes an intermediate curved portion 153 and end curved portions 154 positioned at both ends of the intermediate curved portion 153. The two end curved portions 154 have the same direction and have a direction opposite to that of the middle curved portion 153. According to the curved direction may have two structural forms specifically. That is, in the form of the heat dissipation fin shown in FIG. 6, the center portion of the heat dissipation fin 1 is bent to the left side, has a longitudinal cross section similar to the letter "C", and on the right side of the center portion to accommodate an accessory device such as a humidifier. Space is formed. In the form of the heat radiation fin shown in FIG. 7, the middle portion of the heat radiation fin 1 is bent to the right side, and a space for accommodating an accessory device such as a humidifier is formed on the left side of the central portion. Therefore, the space utilization around the heat radiating fins is improved, and a small electric heater can be realized.

In the preferred embodiment, both the intermediate curved portion 153 and the end curved portion 154 are arcuate, the radius (R1) of the intermediate curved portion 153 is 80 to 100 mm, the center angle (β ₁ ) is 40 to 70˚. The radius R2 of the end curved portion 154 is 15 to 30 mm, and the central angle β ₂ is 30 to 50 degrees. The length of the upper section 13 and the lower section 14 is the same, the height ratio of the upper and lower both sections 13, 14 and the curved portion 15 is 1: 1 to 0.2: 1. The heat radiation fins corresponding to the size range are not only convenient to process, but also can ensure sufficient strength and rigidity of the entire heat radiation fin 1, prevent concentration of stress, and weld the two fins that are bonded to each other by overlapping. Even after forming the heat radiating fins, the sealing property of the welded part is good, so that leakage of the liquid oil inside the oil induction groove 10 of the heat radiating fins 1 can be effectively prevented. Similarly, the radiuses of the intermediate curved portion 153 and the end curved portion 154 also represent the radius of the center line in the thickness direction of the heat dissipation fin 1. The height of the upper section 13 and the lower section 14 represents the length between the contact point with the end curved portion 154 from the end (top or bottom).

The above embodiment is for explaining the present invention. Those skilled in the art can take various modifications and variations such as bending the heat radiation fins into other forms without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions should fall within the protection scope of the present invention.

The present invention can be used in oil-filled electric heaters that heat fluid media such as mineral oil with electrical heating components.

Claims (9)

Heat dissipation fins 1 sequentially connected; An electrical control box (2) mounted to the heat dissipation fin (1); And A heat generator 3 inside the heat dissipation fin 1; As an oil-filled electric heater comprising: In the electrical control box 2 is provided a switch 21, a temperature controller 22, a thermal protector 23 and a wire 24, The heat radiation fin (1) is in the form of a hollow plate, two or more oil guide grooves 10 are formed therein, The upper and lower ends of the heat dissipation fins 1 are formed or mounted with a hollow connection sleeve 11 extending in a horizontal direction. An oil inlet 12 is formed in the connection sleeve 11, The oil inlet 12 of each of the heat radiation fins 1 is connected to each other, Oil is filled in the heat radiation fin (1), The upper and lower ends of each of the heat dissipation fins 1 are located in different vertical planes, or are located in the same vertical plane, but at least a part thereof is curved and protrudes laterally, Improved oil-filled electric heater, characterized in that each of the radiating fins (1) have the same shape and the same size. The method of claim 1, The upper section 13 and the lower section 14 of each of the heat dissipation fins 1 are located in different vertical planes, and the upper and lower both sections 13 and 14 are connected to one curved portion 15, and the curved portion is The improved oil filled electric heater, characterized in that the part (15) comprises two bends (151, 152) in opposite directions. The method of claim 2, The two curved portions 151 and 152 are all arc-shaped, and the radius and arc length of the curved portion are equal to each other, the radius is 15 mm or more, and the center angle is 30 to 60 degrees. Electric heater. The method of claim 2, The lengths of the upper section 13 and the lower section 14 are equal to each other, and the height ratio of the upper and lower both sections 13 and 14 and the curved portion 15 is 1: 1 to 5: 1. Improved oil rechargeable electric heater. The method of claim 1, The upper section 13 and the lower section 14 of each of the heat dissipation fins 1 are located in the same vertical plane, and the upper and lower both sections 13 and 14 are connected to one curved portion 15, and the curved portion. 15 includes an intermediate curved portion 153 and end curved portions 154 formed at both ends of the intermediate curved portion 153, and the directions of the two end curved portions 154 are the same as each other, and the two end curved portions ( 154) and an improved oil-filled electric heater, characterized in that the direction of the intermediate curved portion 153 is opposite to each other. The method of claim 5, wherein The intermediate curved portion 153 and the end curved portion 154 are both arc-shaped, the radius of the intermediate curved portion 153 is 80 to 100 mm, the center angle is 40 to 70 degrees, the radius of the end curved portion 154 Is 15 to 30 mm, and the center angle is 30 to 50 degrees. The method of claim 5, wherein The length of the upper section 13 and the lower section 14 is the same, and the height ratio of the upper and lower side sections 13, 14 and the curved portion 15 is characterized in that 1: 1 to 0.2: 1. Improved oil-filled electric heater. The method according to any one of claims 1 to 7, The electrical control box 2 is mounted to the leftmost heat dissipation fin, the rightmost heat dissipation fin is equipped with a rear cover 4, and both the electrical control box 2 and the rear cover 4 are heat dissipation opening 100. ) Is an improved oil-filled electric heater characterized in that it is formed. The method according to any one of claims 1 to 7, Improved oil-filled electric heater, characterized in that the lower portion of the heat radiation fin (1) is equipped with a roller (5).

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