KR100836056B1 - Magnetron unit - Google Patents

Abstract

A magnetron unit is provided to prevent the temperature of magnet from being raised, as well as ensuring necessary intensity of magnetic field, by using a heat dissipation member having a thermal conduction isolating member. An anode cylinder(260) emits an electron, and magnet(250) is installed in parallel with both sides of the anode cylinder. Yokes are installed on both ends of the magnet to support the magnet. A hear dissipation member(240) has a thermal conduction isolating member for preventing the heat generated from the anode cylinder from being transmitted to the magnet. The thermal conduction isolating member has a first heat dissipation portion(240a) for dissipating the heat generated from the anode cylinder and a second heat dissipation portion(240b) spaced apart from the first heat dissipation portion.

Description

Magnetron Unit {MAGNETRON UNIT}

1 is a perspective view showing a magnetron unit according to an embodiment of the present invention,

FIG. 2 is a side view of the magnetron unit according to FIG. 1; FIG.

3a and 3b is a plan view showing a heat dissipation member used in the magnetron unit according to FIG.

4 is an enlarged plan view of a main portion of the heat dissipation member according to FIG. 3B;

5A and 5B are plan views illustrating a modification of the heat dissipation member used in the magnetron unit according to FIG. 1;

6 is a perspective view showing a magnetron unit according to another embodiment of the present invention;

7 is a side view illustrating the magnetron unit according to FIG. 6;

8 is a perspective view showing a heat dissipation member used in the magnetron unit according to FIG. 6;

9 is a view showing an auxiliary heat radiating member used in the magnetron unit according to FIG. 6;

10 is a perspective view illustrating a state in which the heat dissipation member and the auxiliary heat dissipation member according to FIGS. 8 and 9 are combined;

11 is a plan view showing a heat dissipation member according to FIG. 8;

FIG. 12 is an experimental graph illustrating a temperature relationship between “S” and the anode cylinder of the heat dissipation member of FIG. 8.

** Description of symbols for the main parts of the drawing **

200,300: magnetron unit 210,310: output unit

221,222,321,322 Yoke 240,340 Heat dissipation member

250,350: Magnet 260,360: Anode cylinder

280,333: fastening member 290,390: input unit

380: auxiliary heat radiation member

The present invention relates to a magnetron unit, and more particularly, to a magnetron unit capable of preventing the heat of the high temperature anode cylinder from being transferred to the magnet and cooling other components below the standard.

A typical magnetron unit is provided with a heat radiating member for conducting heat generated from a high temperature anode cylinder to a heat sink. In the conventional heat dissipation member, since the magnet and the anode cylinder are inserted to support the heat dissipation at the same time, the heat dissipates heat, and both the magnet and the anode cylinder are configured to completely contact the heat dissipation member.

However, in the conventional heat dissipation member, as the magnet is also completely in contact with the heat dissipation member, heat generated in the anode cylinder is transferred along the heat dissipation member to the magnet, thereby degrading the performance of the magnet.

In addition, when the magnetron is used in the lighting device, there is a disadvantage in that a heat dissipation member for dissipating other heat generating parts such as an input part cannot be installed due to its weight.

The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to provide a magnetron unit having a heat dissipation member that can maintain a low temperature of the magnet including a component having excellent thermal performance.

It is also an object of the present invention to provide a magnetron unit having a heat dissipation member capable of promoting cooling of the magnet.

Still another object of the present invention is to provide a magnetron unit having a heat dissipation member capable of cooling and reducing weight in addition to the anode cylinder and other temperature sensitive components.

The present invention is an anode cylinder for emitting electrons to achieve the object as described above; A magnet installed parallel to both sides of the anode cylinder in a longitudinal direction thereof; Yokes respectively provided at both ends of the magnet to support the magnet; And a heat dissipation member having a heat conduction blocking means for preventing heat generated from the anode cylinder from being transferred to the magnet.

By configuring as described above, heat generated in the anode cylinder can be prevented from being transferred to the magnet by the heat dissipation member.

Herein, the heat conduction blocking means may include: a first heat dissipation unit in contact with the anode cylinder to dissipate heat generated in the anode cylinder; A second heat dissipation part formed to be spaced apart from the first heat dissipation part to contact the magnet, but not to contact the magnet at a portion adjacent to the first heat dissipation part; And a third heat dissipation part extending from the second heat dissipation part. As such, by preventing the second heat radiating portion adjacent to the first heat radiating portion from contacting the magnet, the heat conducted from the anode cylinder to the first heat radiating portion may be prevented from being conducted to the magnet through the second heat radiating portion. have.

On the other hand, the area of the second heat radiating portion is characterized in that larger than the cross-sectional area of the magnet. The area where the magnet does not contact the second heat radiating portion is present by increasing the area of the second heat radiating portion rather than the area of the cross section perpendicular to the longitudinal direction of the magnet.

In addition, the second heat dissipation portion is characterized in that the diameter at the portion adjacent to the first heat dissipation portion is larger than the diameter at the other portion. When the magnet is cylindrical, it is effective to form the second heat dissipation portion in a circular shape, and in this case, the second heat dissipation portion may be formed in circles having different diameters.

Here, the magnet is preferably in contact with the portion having a smaller diameter in contact with the second heat radiating portion. As a result, the larger diameter portion is not in contact with the magnet, thereby preventing the heat of the first heat radiating portion from being conducted to the magnet.

Meanwhile, at least one of the first heat dissipation unit or the second heat dissipation unit may be formed in a polygonal shape.

In addition, any one of the second heat radiation portion is characterized in that it does not completely surround the magnet. That is, when there are a plurality of magnets, a plurality of second heat dissipating parts of the heat dissipating member which are in contact with and supported by the plurality of magnets may be formed. At this time, some of the plurality of second heat dissipating parts may be formed so as not to completely surround the magnets.

Here, it is effective that the portion not completely surrounding the magnet is formed on the other side of the heat sink.

The third heat dissipating unit is characterized in that it is formed extending from any one of the second heat dissipating unit. Here, the end of the third heat dissipation portion is in contact with the heat sink for dissipating heat of the heat dissipation member.

On the other hand, the present invention, the anode cylinder for emitting electrons; A magnet installed parallel to both sides of the anode cylinder in a longitudinal direction thereof; Upper and lower yokes respectively installed at both ends of the magnet to support the magnet; An input unit contacting the lower yoke and supplying power; A first heat dissipation unit for dissipating heat generated from the anode cylinder, a second heat dissipation unit spaced apart from the first heat dissipation unit, and not in contact with the magnet in a portion adjacent to the first heat dissipation unit, and the second heat dissipation unit; A heat dissipation member having a third heat dissipation portion extending from the portion; And an auxiliary heat dissipation member disposed between the heat dissipation member and the input unit to dissipate the input unit.

Here, the second heat dissipation unit is characterized in that formed on only one side based on the first heat dissipation unit. The auxiliary heat dissipation member serves as the second heat dissipation unit on the other side of the first heat dissipation unit, and thus the weight of the heat dissipation member can be reduced by forming the second heat dissipation unit on only one side.

On the other hand, the third heat dissipation portion is characterized in that it extends to the opposite side of the first heat dissipation portion with respect to the second heat dissipation portion. This is because a heat sink is formed on an opposite side of the second heat dissipation unit based on the first heat dissipation unit.

In addition, the shortest distance between the longitudinal edge of the heat dissipation member and the first heat dissipation portion is characterized in that the 4.5mm to 12.5mm.

The auxiliary heat dissipation member is characterized in that the step in contact with the heat dissipation member and the part in contact with the input portion forms a step. By forming a step, cooling effect by air can be obtained.

The auxiliary heat dissipation member may be in contact with a portion adjacent to the third heat dissipation part of the heat dissipation member. Since the third heat dissipation part contacts the heat sink, the heat dissipation effect can be enhanced by bringing the auxiliary heat dissipation member into contact with the portion adjacent to the third heat dissipation part.

The thickness of the heat radiation member is characterized in that greater than the thickness of the auxiliary heat radiation member. Even if the thickness of the auxiliary heat dissipation member is thinner than the heat dissipation member, since the heat dissipation effect by the heat dissipation member is greater, there is no influence on the heat dissipation effect and the weight of the entire magnetron unit can be reduced.

The objects and features of this invention will become more apparent from the following detailed description.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the configuration and operation according to an embodiment of the present invention.

However, in describing the present invention, a detailed description of known functions or configurations will be omitted to clarify the gist of the present invention.

1 is a perspective view illustrating a magnetron unit according to an exemplary embodiment of the present invention, and FIG. 2 is a side view illustrating the magnetron unit according to FIG. 1.

1 and 2, the magnetron unit 200 according to an embodiment of the present invention, the input unit 290 for supplying external power to the magnetron unit 200, and the input unit 290 An output unit 210 formed on the opposite side of the to emit electromagnetic waves, an anode cylinder 260 formed between the input unit 290 and the output unit 210 to generate electromagnetic waves, and the anode cylinder 260 The heat dissipation member is formed to surround the magnet 250 mounted on the side, the upper yoke 221 and the lower yoke 222 for supporting the magnet 250, and the magnet 250 and the anode cylinder 260 And 240.

Here, the upper yoke 221 and the lower yoke 222 are fastened to each other by the fastening member 280. The fastening member 280 is preferably a screw, but is not necessarily limited thereto, and riveting may be used.

Meanwhile, the magnet 250 includes aluminum (Al), nickel (Ni), and cobalt (Co) components having excellent thermal performance. The conventional magnet formed of ferrite has a temperature coefficient of -0.18% / ° C, whereas the temperature coefficient of the magnet 230 according to the present invention containing aluminum, nickel, and cobalt is -0.016% / ° C, which is smaller than that of the conventional ferrite magnet. .

In order to maximize the performance of the magnet 250 containing a component having excellent thermal performance as described above, the heat dissipation member 240 having a heat conduction blocking means for preventing heat from the anode cylinder 260 from being transferred to the magnet 250. Is needed. Such heat conduction blocking means will be described in detail below.

3A and 3B are plan views illustrating a heat dissipation member used in the magnetron unit according to FIG. 1, FIG. 4 is an enlarged plan view of a main portion of the heat dissipation member according to FIG. 3B, and FIGS. 5A and 5B are according to FIG. 1. It is a top view which shows the modification of the heat radiating member used for a magnetron unit.

3A and 3B, the heat dissipation members 240 and 241 used in the magnetron unit 200 according to the exemplary embodiment of the present invention have a substantially long and thin hexahedral shape and have a first heat dissipation contact with the anode cylinder 260. The heat dissipation part 240a and 241a, the second heat dissipation part 240b and 241b which are formed to be spaced apart from the first heat dissipation part 240a and 241a and are in contact with the magnet 250, and are in contact with a heat sink (not shown). It comprises a third heat dissipation unit (240c, 241c).

Here, since the third heat dissipation parts 240c and 241c are formed on only one side, the heat dissipation members 240 and 241 may be referred to as one-way expansion type heat dissipation members for convenience of description.

The first heat dissipation part 240a, the second heat dissipation part 240b, and the magnet 250 formed in the heat dissipation member 240 of FIG. 3A are formed in a circular shape. Here, the diameter of the magnet 250 is smaller than the diameter of the second heat radiating part 240b.

When the magnet 250 is in contact with the second heat dissipation part 240b, the magnet and the magnet of the second heat dissipation part 240b close to the first heat dissipation part 240a which the anode cylinder 260 is in contact with. It is installed so that 250 does not contact. That is, the magnet 250 is in contact with the second heat dissipating part 240b to be farthest from the first heat dissipating part 240a.

Since the diameter of the second heat dissipating part 240b is larger than the diameter of the magnet 250, when the magnet 250 is installed to be far from the first heat dissipating part 240a, the magnet 250 and the first part are separated from the first heat dissipating part 240a. A portion where the second heat dissipation part 240b does not come into contact with each other, and the heat of the anode cylinder 260 conducted by the first heat dissipation part 240a due to the non-contacting part is transferred to the magnet 250. It can prevent the fall.

The heat dissipation member 241 of FIG. 3B is different in shape from the heat dissipation member 240 and the second heat dissipation unit 241b of FIG. 3A.

As shown in FIG. 4, the second heat dissipation part 241b is formed of two circles having different diameters. At this time, it is preferable that the portion close to the first heat dissipation portion 241a is formed of a circle having a small diameter, and the far portion is formed of a circle having a large diameter. In addition, it is effective that the diameter of the magnet 250 is the same as the portion of the small diameter of the second heat radiating portion 241b.

When the magnet 250 is in contact with a portion formed by a circle having a small diameter of the second heat dissipating portion 241b, the portion formed by a circle having a large diameter of the second heat dissipating portion 241b is in contact with the magnet 250. You will not.

Therefore, the portion of the circle having a large diameter does not contact the magnet 250, thereby preventing the heat of the anode cylinder 260 from being transferred to the magnet 250.

5A and 5B are plan views illustrating modified examples of the heat dissipation member used in the magnetron unit according to FIG. 1.

The heat dissipation members 242 and 243 illustrated in FIGS. 5A and 5B are referred to as bidirectional extended heat dissipation members for convenience of description because the third heat dissipation parts 242c and 243c are formed at both sides.

The bidirectional extended heat dissipation members 242 and 243 have the same configuration as the above-mentioned one-way extended heat dissipation members 240 and 241 except that the third heat dissipation parts 242c and 243c are formed at both sides.

That is, the heat dissipation member 242 of FIG. 5A has a first heat dissipation portion 242a at the center thereof, and second heat dissipation portions 242b are formed at both sides thereof, and the first heat dissipation portion 242b is formed on the basis of the second heat dissipation portion 242b. The third heat dissipation part 242c is formed on the opposite side of the heat dissipation part 242a.

Here, the diameter of the second heat dissipation part 242c is preferably formed of a circle larger than the diameter of the magnet 250.

Meanwhile, the heat dissipation member 243 of FIG. 5B has a first heat dissipation portion 243a at the center thereof, and second heat dissipation portions 243b are formed at both sides thereof, and the first heat dissipation member 243 is formed on the basis of the second heat dissipation portion 243b. The third heat radiating portion 243c is formed on the opposite side of the heat radiating portion 243a, respectively. Here, the second heat dissipation part 243b is formed of a plurality of circles having different diameters, and a small diameter part is formed away from the first heat dissipation part 243a so that the magnet 250 is in contact with the part. It is effective.

The heat sink is in contact with the third heat dissipation parts 240c, 241c, 242c and 243c of the heat dissipation members 240, 241, 242 and 243.

The shape of the first heat dissipation part 240a, 241a, 242a, and 243a and the second heat dissipation part 240b, 241b, 242b, and 243b is not limited to a circular shape, but may be formed as a partial circle, a partial rectangle, or a polygon.

6 is a perspective view illustrating a magnetron unit according to another exemplary embodiment of the present invention, and FIG. 7 is a side view illustrating the magnetron unit according to FIG. 6.

6 and 7, the magnetron unit 300 according to another embodiment of the present invention, the anode cylinder for emitting electrons; A magnet 350 installed parallel to both sides of the anode cylinder 360 in a longitudinal direction thereof; Upper and lower yokes 321 and 322 respectively installed at both ends of the magnet to support the magnet 350; An input unit 390 in contact with the lower yoke 322 to supply power; The magnet 350 is formed at a portion spaced apart from the first heat dissipation unit 340a and the first heat dissipation unit 340a to dissipate heat generated by the anode cylinder 390 and adjacent to the first heat dissipation unit 340a. A heat dissipation member 340 having a second heat dissipation unit 340b not contacting the third heat dissipation unit 340b and a third heat dissipation unit 340c extending from the second heat dissipation unit 340b; And an auxiliary heat dissipation member 380 installed between the heat dissipation member 340 and the input unit 390 to dissipate the input unit 390.

Here, the yokes 321 and 322 are fastened to each other by the fastening member 380. The fastening member 380 is preferably a screw, but is not limited thereto, and riveting may be used.

The magnetron unit 300 illustrated in FIG. 6 has the same configuration as that of the magnetron unit 200 illustrated in FIG. 1. However, only the configurations of the heat radiating member 340 and the auxiliary radiating member 380 are different. This will be described.

FIG. 8 is a perspective view illustrating a heat dissipation member used in the magnetron unit according to FIG. 6, and FIG. 9 is a view illustrating an auxiliary heat dissipation member used in the magnetron unit according to FIG. 6, and FIG. 10 is a view illustrating FIGS. 8 and 9. FIG. 11 is a perspective view illustrating a state in which the heat dissipation member and the auxiliary heat dissipation member are coupled, and FIG. 11 is a plan view of the heat dissipation member according to FIG. 8.

The heat dissipation member 340 has a first heat dissipation portion 340a in contact with the anode cylinder 360, and a third heat dissipation portion for transferring heat of the anode cylinder 360 to a heat sink (not shown). 340d is formed. In addition, the heat dissipation member 340 is provided with a coupling hole 340d into which a second heat dissipation part 340b for the magnet 350 and a coupling member for coupling with the auxiliary heat dissipation member 380 are inserted.

On the other hand, the auxiliary heat radiation member 380 is configured to include a lower member 381, and an upper member 382 in contact with a portion of the lower member 381. Here, the upper member 382 and the lower member 381 may be integrally formed, or may be combined after each manufacture.

The auxiliary heat dissipation member 380 is formed with a first heat dissipation portion 380a in contact with the anode cylinder 360 and a second heat dissipation portion 380b in contact with the magnet 350. A coupling hole 380d for coupling with 340 is formed. The coupling hole 380d communicates with the coupling hole 340d of the heat dissipation member 340.

The auxiliary heat radiating member 380 is for cooling a temperature sensitive component other than the anode cylinder 360, and mainly cools the input unit 390. The input unit 390 may be referred to as a filter box and is connected to a capacitor (not shown). Therefore, since the input unit 390 burns or melts when a predetermined temperature is exceeded, a voltage loss may occur, and thus the input unit 390 is cooled by using the auxiliary heat radiating member 380.

As shown in FIG. 10, the lower member 381 of the auxiliary heat radiating member 380 is in surface contact with the upper portion of the input unit 390 to radiate heat from the capacitor and the input unit 390, as well as the lower yoke. The surface of the lower yoke 322 in contact with the upper surface of the magnet 350 in contact with the upper surface of the 322 to heat dissipation of the heat of the magnet 350 as a result.

In addition, the upper member 382 of the auxiliary heat dissipation member 380 is in contact with the heat dissipation member 340, in which the heat sink (340) in contact with the heat sink (not shown) relatively low temperature The portion adjacent to the third heat dissipation part 340c and the auxiliary heat dissipation member 380 are in contact with each other to perform heat dissipation.

The heat dissipation member 340 may be smaller or slimmer than the heat dissipation member 240 according to FIG. 1 and may reduce weight. That is, the heat dissipation member 340 does not have a second heat dissipation portion that is opposite to the third heat dissipation portion 340c. That is, it is the same as removing the part below the "A"-"A" line in FIG. 3A. As such, even when the second heat dissipation part opposite to the heat sink is removed, there is almost no difference in the surface temperature of the anode cylinder 360, and the relative weight can be reduced.

In addition, the shortest distance S between the longitudinal edge of the heat dissipation member 340 and the first heat dissipation portion 340a is the most important design factor for miniaturization or slimming of the heat dissipation member 340. That is, a numerical range that reduces the shortest distance S to the maximum and does not affect the temperature of the anode cylinder 360, which is a cooling performance index, is an optimal range.
In this case, the length direction of the heat dissipation member 340 is a direction in which the first heat dissipation part 340a, the second heat dissipation part 340b, and the third heat dissipation part 340c are arranged as shown in FIG. 11. And can be defined in the vertical direction.
Therefore, the shortest distance S is the heat dissipation member 340 in a direction perpendicular to the direction in which the first heat dissipation unit 340a, the second heat dissipation unit 340b, and the third heat dissipation unit 340c are arranged. The distance between the edge of the first heat dissipation portion 340a.

FIG. 12 is an experimental graph illustrating a temperature relationship between “S” and the anode cylinder of the heat dissipation member of FIG. 8. As shown in FIG. 12, when the shortest distance S is about 4.5 mm, since the slope of the graph is gentle, up to about 12 mm may be an economical numerical range. Therefore, when the shortest distance (S) is 4.5mm to 12.5mm, it can be seen that the temperature of the anode cylinder 360 is not very different.

The magnetron units 200 and 300 may be applied to an electrodeless lighting device, preferably an electrodeless lighting device for a street lamp, but are not limited thereto and may be applied to various fields such as a microwave oven.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

As described above, the present invention can not only prevent the temperature increase of the magnet, but also ensure the required magnetic field strength by using the heat dissipation member having the heat conduction blocking means, thereby improving the reliability of the magnetron unit.

In addition, the present invention can extend the life of the product by preventing the temperature rise of other heat-generating components except the anode cylinder by using the auxiliary heat radiating member.

In addition, the present invention can reduce the overall weight of the magnetron unit and reduce the material cost by miniaturizing or slimming the heat radiating member that the auxiliary heat radiating member is in contact.

Claims (16)

An anode cylinder emitting electrons; A magnet installed parallel to both sides of the anode cylinder in a longitudinal direction thereof; Yokes respectively provided at both ends of the magnet to support the magnet; And And a heat dissipation member having a heat conduction blocking means for preventing heat generated from the anode cylinder from being transmitted to the magnet. The heat conduction blocking means, A first heat dissipation unit that contacts the anode cylinder to dissipate heat generated from the anode cylinder, and is spaced apart from the first heat dissipation unit to contact the magnet, but does not contact the magnet at a portion adjacent to the first heat dissipation unit Magnetron unit characterized in that it comprises a second heat dissipation unit. The method of claim 1, The heat conduction blocking means further comprises a third heat dissipation unit extending from the second heat dissipation unit. The method of claim 1, Magnetron unit, characterized in that the area of the second heat dissipation is larger than the cross-sectional area of the magnet. The method of claim 1, And said second heat dissipating unit has a diameter in a portion adjacent to said first heat dissipating unit larger than a diameter in other portions. The method of claim 3, wherein The magnet is in contact with the second heat dissipation portion, the magnetron unit, characterized in that the contact with the smaller diameter. The method of claim 1, At least one of the first heat dissipation unit or the second heat dissipation unit has a magnetron unit, characterized in that the shape of the polygon. The method of claim 1, The magnetron unit, characterized in that any one of the second heat radiating portion does not completely surround the magnet. The method of claim 2, The third heat dissipation unit, the magnetron unit, characterized in that formed extending from any one of the second heat dissipation unit. The method of claim 8, The end of the third heat dissipation portion, the magnetron unit, characterized in that the contact with the heat sink for dissipating heat of the heat dissipation member. An anode cylinder emitting electrons; A magnet installed parallel to both sides of the anode cylinder in a longitudinal direction thereof; Upper and lower yokes respectively installed at both ends of the magnet to support the magnet; An input unit contacting the lower yoke and supplying power; A first heat dissipation unit for dissipating heat generated from the anode cylinder, a second heat dissipation unit spaced apart from the first heat dissipation unit, and not in contact with the magnet in a portion adjacent to the first heat dissipation unit, and the second heat dissipation unit; A heat dissipation member having a third heat dissipation portion extending from the portion; And And a second heat dissipation member disposed between the heat dissipation member and the input unit to dissipate the input unit. The method of claim 10, The second heat dissipation unit is a magnetron unit, characterized in that formed on only one side based on the first heat dissipation unit. The method of claim 11, The third heat dissipation unit, the magnetron unit, characterized in that extending to the opposite side of the first heat dissipation unit on the basis of the second heat dissipation unit. The method of claim 10, In the direction perpendicular to the direction in which the first heat dissipation unit, the second heat dissipation unit and the third heat dissipation unit are arranged, the shortest distance between the edge of the heat dissipation member and the first heat dissipation unit is 4.5mm to 12.5mm. Magnetron unit. The method according to any one of claims 10 to 13, The auxiliary heat dissipation member is a magnetron unit, characterized in that the step in contact with the heat dissipation member and the part in contact with the input unit forms a step. The method of claim 14, The auxiliary heat dissipation member, the magnetron unit, characterized in that in contact with the portion adjacent to the third heat dissipation member. The method of claim 15, The thickness of the heat radiating member is a magnetron unit, characterized in that greater than the thickness of the auxiliary heat radiating member.

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