CN105276660A - Heat sink and heater with same - Google Patents

Abstract

The invention discloses a radiating fin and a warmer with the same, wherein the radiating fin comprises: the radiating part is arranged at the edge of the radiating body, a radiating air channel is defined in the radiating part, at least one radiating hole communicated with the radiating air channel is formed in the radiating part, the radiating part and the radiating body are integrally formed, or the radiating part and the radiating body are respectively two independent parts, and the radiating part is connected with the edge of the radiating body. According to the radiating fin, the radiating part is arranged, so that the temperature rise of the edge of the radiating fin can be effectively reduced, and when the radiating fin is used for a warmer such as an oil-filled warmer, scalding caused by too high temperature of the edge of the radiating fin can be prevented. In addition, the radiating part has a better decorative effect, so that the radiating fin is attractive in appearance.

Description

Heat sink and heater with same

technical field

The invention relates to the field of household appliances, in particular to a heat sink and a heater with the same.

Background technique

In the related art, the cooling fins of the oil-filled heater are in the form of thin sheets or bent to form chimney-like convection. However, for thin sheet heat sinks, although the processing technology of this kind of heat sink is mature, the temperature rise of the edge is high, which is easy to burn the user; The processing technology is complicated and the cost is high.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, it is an object of the invention to propose a heat sink which has a low edge temperature.

Another object of the present invention is to provide a heater with the above-mentioned cooling fins.

The heat sink according to the embodiment of the first aspect of the present invention includes: a heat dissipation body; and at least one heat dissipation part, the heat dissipation part is arranged on the edge of the heat dissipation body, a heat dissipation air duct is defined in the heat dissipation part, and the heat dissipation part At least one heat dissipation hole communicating with the heat dissipation air duct is formed on the top, the heat dissipation part is integrally formed with the heat dissipation body, or the heat dissipation part and the heat dissipation body are two separate parts respectively, and the heat dissipation part connected to the edge of the heat dissipation body.

According to the heat sink of the embodiment of the present invention, the temperature rise of the edge of the heat sink can be effectively reduced by setting the heat dissipation part, and when the heat sink is used in a heater such as an oil-filled heater, it can prevent burns due to excessive temperature at the edge of the heat sink. In addition, the heat dissipation part has a good decorative effect, which makes the appearance of the heat dissipation fin beautiful.

According to an embodiment of the present invention, the heat dissipation holes are formed on the surface of the heat dissipation part except the surface adjacent to the center of the heat dissipation body, or the heat dissipation holes are formed on the outer peripheral surface of the heat dissipation part. Vents.

Further, a plurality of the heat dissipation holes are formed on each of the surfaces of the heat dissipation portion except one side surface adjacent to the center of the heat dissipation body.

Optionally, the plurality of heat dissipation holes are arranged in multiple rows and columns on the corresponding surface of the heat dissipation portion.

According to an embodiment of the present invention, one of the two longitudinal ends of the heat dissipation air duct is an inlet end, and the other end is an outlet end, wherein the inner wall of the inlet end adjacent to the center of the heat dissipation body is configured to The flow direction extends obliquely toward the center of the heat dissipation body, and the inner wall of the outlet end adjacent to the center of the heat dissipation body is configured to extend obliquely along the flow direction of the airflow toward a direction away from the center of the heat dissipation body.

Optionally, the inner wall surface of the inlet end or the outlet end adjacent to the center of the heat dissipation body is formed as an inclined plane or an inclined curved surface.

According to an embodiment of the present invention, there are two heat dissipation parts, and the two heat dissipation parts are respectively located on two sides in the width direction of the heat dissipation body.

According to another embodiment of the present invention, there are three heat dissipation parts, two of the three heat dissipation parts are located on both sides of the heat dissipation body in the width direction, and the other is located on the two sides of the heat dissipation body. on one side of the length direction.

Optionally, the heat dissipation air passages of the two heat dissipation parts on both sides in the width direction communicate with the heat dissipation air passages of the heat dissipation part on one side in the length direction.

According to an embodiment of the present invention, when the heat dissipation part and the heat dissipation body are two separate parts, the heat dissipation part and the heat dissipation body are connected through a connection structure, and the connection structure includes: a first connection part, the first connecting part is arranged on the heat dissipation part; and a second connecting part, the second connecting part is arranged on the heat dissipation body, and the second connecting part cooperates with the first connecting part To connect the heat dissipation part to the edge of the heat dissipation body.

Optionally, the first connecting piece is a socket protrusion provided on a side of the heat dissipation part adjacent to the center of the heat dissipation body, and the second connection piece is a socket formed on the edge of the heat dissipation body. slot, and the insertion protrusion is embedded in the slot and fixed in the slot.

According to an embodiment of the present invention, the cross-sectional outline of the heat dissipation portion is a straight line, a curved line, or a combination of straight lines and curved lines.

Optionally, the cross-sectional shape of the heat dissipation part is square.

Optionally, each of the cooling holes is a circular hole, an oval hole, an oblong hole or a polygonal hole.

The heater according to the embodiment of the second aspect of the present invention includes the heat sink according to the embodiment of the above-mentioned first aspect of the present invention.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of the assembly of a plurality of cooling fins according to an embodiment of the present invention;

Fig. 2 is a cross-sectional view of a plurality of heat sinks shown in Fig. 1;

Fig. 3 is an enlarged view of part A circled in Fig. 2;

Fig. 4 is a front view of a plurality of cooling fins shown in Fig. 1;

Figure 5 is a side view of a plurality of heat sinks shown in Figure 1;

Fig. 6 is a top view of a plurality of heat sinks shown in Fig. 1;

7 is a schematic diagram of the assembly of a plurality of heat sinks according to another embodiment of the present invention;

FIG. 8 is a side view of the plurality of fins shown in FIG. 7 .

Reference signs:

1: cooling body; 2: cooling part;

11: first communicating chamber; 12: second communicating chamber; 13: third communicating chamber; 14: slot;

21: cooling air duct; 22: cooling hole; 23: socket protrusion;

24: inlet end; 241: the inner wall adjacent to the center of the heat dissipation body at the inlet end;

25: the outlet end; 251: the inner wall of the outlet end adjacent to the center of the heat dissipation body.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention.

In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second" and "third" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

A heat sink according to an embodiment of the present invention will be described below with reference to FIGS. 1-8 . Fins can be used in heaters such as oil-filled heaters. In the following description of this application, the use of radiator fins in oil-filled heaters is taken as an example for illustration. Of course, those skilled in the art can understand that the radiator fins can also be used in other types of heaters, not limited to oil-filled heaters.

As shown in FIGS. 1-8 , the heat sink according to the embodiment of the first aspect of the present invention includes a heat dissipation body 1 and at least one heat dissipation portion 2 .

Specifically, for example, referring to Fig. 1-Fig. 2 and Fig. 4-Fig. The cavity 12 and the third communicating cavity 13, the first communicating cavity 11 and the third communicating cavity 13 are all formed in a cylindrical shape and protrude from the front surface and the rear surface of the heat dissipation body 1, and the second communicating cavity 12 extends in the vertical direction and is connected to the between the first communication cavity 11 and the third communication cavity 13 .

Referring to FIG. 1 and FIG. 2 in conjunction with FIG. 3 , the heat dissipation part 2 is arranged on the edge of the heat dissipation body 1 , and a heat dissipation air duct 21 is defined inside the heat dissipation part 2 , and the heat dissipation part 2 is a hollow structure at this time. At least one heat dissipation hole 22 communicating with the heat dissipation air duct 21 is formed on the heat dissipation portion 2 . Thus, when the cooling fins are used for a heater such as an oil-filled heater, during the working process of the heater such as an oil-filled heater, the external airflow can enter the heat dissipation air duct 21 through the heat dissipation holes 22 and flow in the heat dissipation air duct 21. In this way, the temperature at the edge of the heat sink can be reduced, which is conducive to air circulation and heat dissipation, so that while ensuring the heating effect of heaters such as oil-filled heaters, it can effectively prevent burns caused by excessive temperature at the edge of the heat sink.

Wherein, the heat dissipation part 2 can be integrally formed with the heat dissipation body 1 . That is to say, the heat dissipation part 2 and the heat dissipation body 1 are integrally processed and manufactured, and the heat dissipation part 2 is a part of the heat dissipation body 1 at this time. For example, the heat dissipation part 2 can be integrally stretched and formed with the heat dissipation body 1 , but it is not limited thereto. Therefore, the processing is simple and the cost is low.

Of course, the present invention is not limited thereto, and the heat dissipation part 2 and the heat dissipation body 1 can also be two separate components, and the heat dissipation part 2 is connected to the edge of the heat dissipation body 1 . Optionally, the heat dissipation part 2 and the heat dissipation body 1 may be detachably connected (for example, a snap connection or a plug connection hereinafter, etc.), thereby making the heat dissipation part 2 easy to install and disassemble. Of course, the heat dissipation part 2 can also be fixedly connected with the heat dissipation body 1 (for example, welding, bonding, etc.).

When the cooling fins are used for heaters such as oil-filled heaters, for example, a plurality of cooling fins are arranged side by side in the front and rear direction as shown in Figure 1, Figure 5 and Figure 6, and the first communication on the plurality of cooling fins The cavity 11 and the third communicating cavity 13 communicate with each other respectively. Since the second communicating cavity 12 communicates with the first communicating cavity 11 and the third communicating cavity 13, the plurality of first communicating cavity 11 and the plurality of second communicating cavity on the plurality of cooling fins The second communication cavity 12 and the plurality of third communication cavities 13 constitute an internally connected cavity, in which there may be heat-conducting oil, and the plurality of first communication cavities 11 constitute a placement cavity for placing electric heating tubes. When working, the heat conduction oil around the electric heating tube is heated, rises from the third communication chamber 13 along the second communication chamber 12 to the first communication chamber 11, convectively circulates along the heat sink, and radiates heat through the inner wall of the cavity, thereby heating In the surrounding environment, the cooled heat transfer oil descends to the electric heating tube and is heated again, and so on.

During this process, the external airflow can enter into the heat dissipation air duct 21 through the heat dissipation holes 22 on the heat dissipation part 2, and the air flow can exchange heat with the heat dissipation part 2 during the process of flowing through the heat dissipation air duct 21, thereby reducing heat dissipation. The temperature of the part 2 effectively ensures the safety of users, and the airflow after heat exchange can enter the external environment through the cooling holes 22, thereby improving the heating effect of heaters such as oil-filled heaters.

According to the heat sink of the embodiment of the present invention, by setting the heat dissipation part 2, the temperature rise of the edge of the heat sink can be effectively reduced, and when the heat sink is used for a heater such as an oil-filled heater, it can prevent the edge temperature of the heat sink from being too high to cause burns . In addition, the heat dissipation part 2 has a good decorative effect, which makes the heat dissipation fin look beautiful.

A heat sink according to a specific embodiment of the present invention will be described below with reference to FIGS. 1-6 .

As shown in FIG. 1 and FIG. 2 , the heat sink includes a heat dissipation body 1 and two heat dissipation parts 2 . The heat sink is generally rectangular in shape, and the heat dissipation body 1 is arranged vertically (i.e., longitudinally). The heat dissipation body 1 can include two sub-radiation fins, and the two sub-radiation fins are mounted together, and a first communication is defined between the two sub-radiation fins. cavity 11 , a second communicating cavity 12 and a third communicating cavity 13 . The two heat dissipation parts 2 are located on both sides of the heat dissipation body 1 in the width direction (for example, the left and right directions in FIG. 1 ). Wherein, the two heat dissipation parts 2 are preferably symmetrical along the longitudinal central axis of the heat dissipation fin.

Heat dissipation holes 22 are formed on the surface of the heat dissipation portion 2 except the surface adjacent to the center of the heat dissipation body 1 . Wherein, the cross-sectional outline of the heat dissipation portion 2 is a straight line, a curved line, or a combination of a straight line and a curved line. Specifically, referring to FIGS. 1-3 , the cross-sectional shape of the heat dissipation part 2 is a square shape, and among the four sides of the heat dissipation part 2, there is no heat dissipation hole 22 on the side adjacent to the longitudinal central axis of the heat dissipation body 1, while the remaining three Heat dissipation holes 22 are formed on each side. Thus, while ensuring the heat dissipation effect, the strength of the heat dissipation portion 2 can be effectively ensured.

Further, a plurality of heat dissipation holes 22 are formed on each surface of the heat dissipation portion 2 except the surface adjacent to the center of the heat dissipation body 1 . Optionally, the plurality of heat dissipation holes 22 are arranged in multiple rows and columns on the corresponding surface of the heat dissipation portion 2 . Referring to FIG. 1 and FIG. 2 in combination with FIG. 3, four rows of cooling holes 22 spaced apart in the left-right direction and arranged in the up-down direction are respectively formed on the front surface and the rear surface of the heat dissipation portion 2, and each adjacent two rows of cooling holes A plurality of cooling holes 22 in 22 are staggered in the vertical direction; similarly, on the side of the cooling part 2 away from the longitudinal central axis of the cooling body 1, three rows of cooling holes 22 spaced apart in the left and right directions and arranged in the vertical direction are formed. As for the holes 22 , the plurality of heat dissipation holes 22 in every two adjacent rows of heat dissipation holes 22 are distributed alternately in the up and down direction. Each cooling hole 22 is a circular hole. Certainly, each cooling hole 22 may also be an oval hole, an oblong hole, or a polygonal hole. Thus, by setting dense cooling holes 22, the cooling air channel 21 will form a mixed exchange of up, down, left, right, front and back, so that the heat dissipation efficiency of the cooling fin can be further improved, and while the heating effect can be ensured, the edge of the cooling fin can be further reduced. Temperature rise, to prevent the heat sink edge temperature is too high to cause burns.

Of course, heat dissipation holes 22 (not shown) may also be formed on the outer peripheral surface of the heat dissipation portion 2 , that is, heat dissipation holes 22 may be formed on each surface of the heat dissipation portion 2 in the transverse direction. Thereby, the heat radiation effect of the heat radiation part 2 can be further improved.

It can be understood that the specific shape of the heat dissipation part 2 and the arrangement of the heat dissipation holes 22 thereon can be adaptively changed according to the actual heat dissipation requirements, which is not specifically limited in the present invention.

As shown in FIG. 4 , one of the two longitudinal ends of the cooling air duct 21 is the inlet end 24 (eg, the lower end in FIG. 2 ), and the other end is the outlet end 25 (eg, the upper end in FIG. 2 ). Wherein, the heat dissipation air channel 21 can be configured so that the longitudinal cross-sectional area of the heat dissipation portion 2 remains constant. Thus, the airflow entering the heat dissipation air passage 21 from the heat dissipation hole 22 at the inlet end 24 of the heat dissipation part 2 can flow upward along the extending direction of the heat dissipation air passage 21 and flow out from the heat dissipation hole 22 at the outlet end 25 .

Wherein the inner wall 241 adjacent to the center of the heat dissipation body 1 of the inlet end 24 is configured to extend obliquely along the flow direction of the airflow (for example, from bottom to top) towards the center of the heat dissipation body 1, and the inner wall 251 of the outlet end 25 adjacent to the center of the heat dissipation body 1 It is configured to extend obliquely in a direction away from the center of the heat dissipation body 1 along the flow direction of the airflow. For example, in the example of FIG. 4 , the inner wall surfaces of the inlet end 24 and the outlet end 25 adjacent to the center of the heat dissipation body 1 are generally formed as inclined planes, so that the heat dissipation hole 22 at the inlet end 24 of the heat dissipation part 2 enters into the heat dissipation surface. The airflow in the air duct 21 can flow to the outlet end 25 under the guidance of the inner wall surface of the inlet end 24 adjacent to the center of the heat dissipation body 1. Under the guidance of the inner wall surface, it flows out from the cooling hole 22 at the outlet end 25 . Certainly, the inner wall surface of the inlet end 24 or the outlet end 25 adjacent to the center of the heat dissipation body 1 is generally formed as an oblique curved surface (not shown in the figure).

When the heat dissipation part 2 and the heat dissipation body 1 are two separate parts, the heat dissipation part 2 and the heat dissipation body 1 can be connected through a connection structure, and the connection structure includes: a first connecting piece and a second connecting piece, and the first connecting piece is located at On the heat dissipation part 2 , the second connecting piece is arranged on the heat dissipation body 1 , and the second connecting piece cooperates with the first connecting piece to connect the heat dissipation part 2 to the edge of the heat dissipation body 1 . For example, referring to FIG. 2 and in conjunction with FIG. 3 , the first connector is an insertion protrusion 23 located on a side of the heat dissipation part 2 adjacent to the center of the heat dissipation body 1 , and the second connector is a socket formed on the edge of the heat dissipation body 1 . The slot 14 and the insertion protrusion 23 are embedded in the slot 14 and fixed in the slot 14 . Thus, when installing the heat dissipation unit 2, the heat dissipation unit 2 can be easily installed on the heat dissipation body 1, and when the heat dissipation unit 2 is not needed or the heat dissipation unit 2 is replaced, the heat dissipation unit 2 can be easily removed from the heat dissipation body 1 .

A heat sink according to another specific embodiment of the present invention will be described below with reference to FIGS. 7 and 8 .

As shown in FIGS. 7 and 8 , the heat sink includes a heat dissipation body 1 and three heat dissipation parts 2 . Two of the three heat dissipation parts 2 are located on both sides of the width direction of the heat dissipation body 1 (for example, the left-right direction in FIG. 7 ), and the other is located on one side of the length direction of the heat dissipation body 1 (for example, upper side in Figure 7).

As a result, since the top and the left and right sides of the heat sink have heat dissipation parts 2 respectively, while reducing the temperature rise of the left and right edges of the heat sink, the temperature rise of the top of the heat sink can also be reduced, thereby further ensuring the safety of users. The heat dissipation efficiency of the heat sink is also further improved.

Other structures of the heat sink according to this specific embodiment may be the same as those described with reference to the above embodiments, and will not be described in detail here.

Certainly, the present invention is not limited thereto, and the heat dissipation air passage 21 of the above-mentioned other of the three heat dissipation parts 2 can also communicate with the heat dissipation air passages 21 of the above-mentioned two of the three heat dissipation parts 2 (not shown in the figure), For example, the cooling channels 21 of the two cooling parts 2 on both sides in the width direction of the cooling body 1 communicate with the cooling channels 21 of the cooling part 2 on one side in the longitudinal direction of the cooling body 1 .

According to the heat sink of the embodiment of the present invention, by setting the heat dissipation part 2 with the heat dissipation air duct 21 and the heat dissipation hole 22 on the edge of the heat dissipation body 1, when the heat sink is used for a heater such as an oil-filled heater, heat exchange can be achieved. It is accelerated at the edge of the heat sink to effectively reduce the temperature rise at the edge of the heat sink. While ensuring the heating effect of heaters such as oil-filled heaters, it can prevent burns caused by excessive temperature at the edge of the heat sink. In addition, the structure of the heat sink is simple and the cost is low.

The heater according to the embodiment of the second aspect of the present invention includes the heat sink according to the embodiment of the above-mentioned first aspect of the present invention.

According to the heater according to the embodiment of the present invention, by providing the above-mentioned cooling fins, while ensuring user safety, the heating effect of the heater is further improved, and the cost of the heater is low.

Other configurations and operations of the heater according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (15)

1. a fin, is characterized in that, comprising:

Heat radiator body; With

At least one radiating part, described radiating part is located at the edge of described heat radiator body, limits heat dissipation wind channel in described radiating part, described radiating part is formed with at least one louvre communicated with described heat dissipation wind channel,

Described radiating part and described heat radiator body one-body molded, or

Described radiating part and described heat radiator body are respectively two independent parts, and described radiating part is connected to the edge of described heat radiator body.

2. fin according to claim 1, is characterized in that, the outer peripheral face surface except a side surface at contiguous described heat radiator body center of described radiating part being all formed with described louvre or described radiating part is all formed with described louvre.

3. fin according to claim 2, is characterized in that, each described surface except a side surface at contiguous described heat radiator body center of described radiating part is formed with the multiple described louvre being spaced apart from each other and arranging.

4. fin according to claim 3, is characterized in that, described multiple louvre many row's multiple rows on the described surface of the correspondence of described radiating part are arranged.

5. fin according to claim 1, is characterized in that, the wherein one end in longitudinal two ends of described heat dissipation wind channel is entrance point, the other end is the port of export,

The inwall at the vicinity described heat radiator body center of wherein said entrance point is configured to the flow direction along air-flow, the direction towards described heat radiator body center tilts to extend, and the inwall at the vicinity described heat radiator body center of the described port of export is configured to along the flow direction of air-flow, towards the direction inclination extension away from described heat radiator body center.

6. fin according to claim 5, is characterized in that, the internal face at the described heat radiator body center of vicinity of described entrance point or the described port of export is formed as tapered plane or skew surface.

7. the fin according to any one of claim 1-6, is characterized in that, described radiating part is two and described two radiating parts lay respectively at the both sides on the width of described heat radiator body.

8. the fin according to any one of claim 1-6, it is characterized in that, described radiating part is three, in described three radiating parts wherein two lay respectively at the both sides on the width of described heat radiator body and another is positioned at the side on the length direction of described heat radiator body.

9. fin according to claim 8, is characterized in that, the described heat dissipation wind channel of two described radiating parts of described width both sides is communicated with the described heat dissipation wind channel of the described radiating part of described length direction side.

10. fin according to claim 1, is characterized in that, when described radiating part and described heat radiator body are respectively two independent parts, described radiating part is connected by syndeton with described heat radiator body, and described syndeton comprises:

First connector, described first connector is located on described radiating part; With

Second connector, described second connector is located in described heat radiator body, and described second connector coordinates the edge described radiating part to be connected to described heat radiator body with described first connector.

11. fin according to claim 10, it is characterized in that, described first connector is that the grafting of the side at the described heat radiator body center of vicinity being located at described radiating part is protruding, described second connector is the slot at the edge being formed in described heat radiator body, and described grafting projection to embed in described slot and is fixed in described slot.

12. fin according to claim 1, is characterized in that, the cross-sectional profiles line of described radiating part is the combination of straightway, curved section or straightway and curved section.

13. fin according to claim 12, is characterized in that, the shape of cross section of described radiating part is square.

14. fin according to claim 1, is characterized in that, each described louvre is circular port, slotted eye, Long Circle hole or polygonal hole.

15. 1 kinds of warmers, is characterized in that, comprise the fin according to any one of claim 1-14.