CN101645383A - Copper tube and fin radiating structure of microwave oven magnetron - Google Patents
Copper tube and fin radiating structure of microwave oven magnetron Download PDFInfo
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- CN101645383A CN101645383A CN200810054095A CN200810054095A CN101645383A CN 101645383 A CN101645383 A CN 101645383A CN 200810054095 A CN200810054095 A CN 200810054095A CN 200810054095 A CN200810054095 A CN 200810054095A CN 101645383 A CN101645383 A CN 101645383A
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- copper
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- magnetron
- fins
- microwave oven
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Abstract
The invention relates to a copper tube and fin radiating structure of a microwave oven magnetron, which comprises copper tubes connected with a positive electrode and fins sleeved on the copper tubes,wherein the heat of the positive electrode is transferred to the fins through the copper tubes, and the heat of the fins is diffused by the air forced to flow by a fan. One end of the copper tubes iswelded on a copper sleeve of the positive electrode, while the other end is sleeved with the fins. Six copper tubes are welded on the copper sleeve of the positive electrode respectively and are sleeved with the fins respectively. The fins are aluminum sheets and are parallel with the wind direction of the air forced to flow. The six copper tubes connected with the positive electrode transfer theheat of the positive electrode to six groups of the fins in leading connection with the six copper tubes. Therefore, the copper tube and fin radiating structure of the microwave oven magnetron enlarges the convection radiating space, increases the heat exchange area and the radiating heat, and improves the radiating efficiency of the magnetron. Simultaneously, a good experimental facility and a measuring method are provided for performance measurement of magnetron cooling fins.
Description
Technical field
The present invention relates to the magnetron of microwave oven, particularly relate to the heat radiation cooling structure of microwave oven magnetic.
Background technology
Microwave oven is the household electrical appliance cooker that utilizes high-frequency microwave that food is heated, and the frictional heat that produces by food molecule high vibration under the radiation effects of high-frequency microwave heats and cooking food.During the cooking in microwave oven operation, microwave penetration food, can inside and outside heating simultaneously, it is fast and use plurality of advantages easily to have an efficient height, speed.Therefore, microwave oven progressively becomes widely used domestic electric appliance.The outward appearance of microwave oven is rectangular shape, and there is fire door in the housing front of cuboid, fire door one side setting operation key.Form furnace chamber in the housing, the top and side of furnace chamber is provided with the internal structure of microwave oven, mainly contains magnetron, waveguide, control circuit device etc.
Magnetron is the heart of microwave oven, is a kind of vacuum device, is used to produce the continuous microwave of heat food.The magnetron main composition partly is tube core and magnet, and tube core comprises negative electrode, anode and antenna.After being positioned at negative electrode that magnetron central authorities have filament and being heated, promptly anode is launched a large amount of electronics.Anode surrounds negative electrode, is positioned at the peripheral of magnetron and is exposed cathodic last ring round resonant cavity of anode.The electronics of cathode emission is subjected to the effect of the high-intensity magnetic field of magnet formation again in the anode motion process, electronics is done the wheel cycloid motion under the acting in conjunction of electric field force and magnetic field force, and vibrates and the generation microwave in the negative electrode resonant cavity.Microwave is exported through antenna, enters furnace chamber through waveguide again.
The power supply connecting device of magnetron includes high-tension transformer, high-voltage capacitor, high voltage silicon stack etc., and anode of magnetron voltage is the pulsating direct current crest voltage of 3～4kV, and magnetron is in work and the high heat of generation under the high pressure conditions.And the conversion efficiency of magnetron is about 70%, i.e. 70% of magnetron power consumption is converted to the microwave radiation energy, and all the other power consumptions of 30% are converted to heat and spread in magnetron.Yet magnetron sustains damage in excessive temperature environmental condition work meeting, therefore; overheat protector is installed on the magnetron; so that when the temperature rise of magnetron surpasses the limit of regulation, the overheat protector action is also cut off operating circuit, prevents that magnetron from damaging because of overheated.
And the more important thing is that magnetron must be provided with cooling device, and in work, cool off, to ensure its normal operation, adopt fan to carry out air blast cooling usually, be the magnetron cooling.
Fig. 1 is the structural representation of the microwave oven magnetic of prior art.As shown in the figure, the housing of magnetron is two square bodies up and down, in the upper body 1 tube core is set, and comprises negative electrode, anode and antenna 7, tube core is set in the lower case 2 also is connected with external power source by attaching plug 3 with the jockey of external power source.The copper sheathing 4 arranged outside fin 6 of anode, fin 6 is tabular aluminium flake, along anode shaft to alternate configuration.Expose to the outside by the side of upper body 1 uncovered 5 around the fin 6 of anode.The side of upper body 1 uncovered 5 is used to the circulation of air of dispelling the heat, from the side to the magnetron blowing, air passes fin 6 backs from relative uncovered the blowing out in another side from uncovered blowing in side by fan, moving air is strengthened heat loss through convection, makes magnetron heat radiation cooling.
But, microwave oven magnetic for above-mentioned prior art, mainly utilize the fin heat radiation cooling of anode outside axial arrangement, although the air that fan blows flows through from the fin gap, but aluminium heat sink is too concentrated, and heat concentrates near the anode, around can not being absorbed well by aluminium flake and conduct to, heat distributes limited, and the heat radiation cooling effectiveness is low.
Summary of the invention
Microwave oven magnetic at above-mentioned prior art exists aluminium heat sink too concentrated, the problem that distribute heat is limited, the present invention releases new magnetron radiator structure, its purpose is, utilize the copper pipe that is connected with anode that anode heat is conducted to bigger space, distribute to flow air by heat convection by the fin that is enclosed within on the copper pipe then,, realize that anode cools to increase heat exchange area and to increase distribute heat.
Copper tube and fin radiating structure of microwave oven magnetron involved in the present invention comprises copper pipe that is connected with anode and the fin that is enclosed within on the copper pipe, and the heat of anode is delivered to fin by copper pipe, and the heat of fin is distributed by the air of fan forced flow.One end of copper pipe is welded on the copper sheathing of anode, and the other end is with fin.Six roots of sensation copper pipe is welded in respectively on the copper sheathing of anode, is with fin respectively.Fin is an aluminium alloy, and fin is parallel to the wind direction of forced flow air.
Copper tube and fin radiating structure of microwave oven magnetron involved in the present invention, the six roots of sensation copper pipe that is connected with anode conducts to six groups of fins of drawing connection with anode heat, has enlarged the heat loss through convection space, has increased heat exchange area, increase distribute heat, improved the magnetron radiating efficiency.Simultaneously, the performance measurement for magnetron cooling fin provides good experimental facilities and method of measurement.
Description of drawings
Fig. 1 is the structural representation of the microwave oven magnetic of prior art.
Fig. 2 is a copper tube and fin radiating structure of microwave oven magnetron schematic diagram of the present invention.
Fig. 3 is arranged on the interior schematic diagram of microwave oven magnetic housing for copper tube and fin radiating structure of the present invention.
Main mark explanation among the figure:
1, upper body 2, lower case
3, attaching plug 4, anode copper sheathing
5, uncovered 6, the fin in upper body side
7, antenna 8, copper pipe
9, fin
Embodiment
Now in conjunction with the accompanying drawings to being described further for the present invention.Fig. 2 shows copper tube and fin radiating structure of microwave oven magnetron of the present invention, and Fig. 3 shows that copper tube and fin radiating structure of the present invention is arranged on the situation in the microwave oven magnetic housing.
As shown in Figures 2 and 3, copper tube and fin radiating structure of microwave oven magnetron involved in the present invention, comprise copper pipe 8 that is connected with anode and the fin 9 that is enclosed within on the copper pipe, the heat of anode is delivered to fin 9 by copper pipe 8, and the heat of fin 9 is distributed by the air of fan forced flow.One end of copper pipe 8 is welded on the copper sheathing 4 of anode, and the other end is with fins set.Six roots of sensation copper pipe 8 is welded in respectively on the copper sheathing 4 of anode, is with fins set respectively.Fin 9 is an aluminium alloy, is parallel to the wind direction of forced flow air.When fan was dried in magnetron, six groups of fins dispelled the heat simultaneously, have increased distribute heat, have improved the magnetron radiating efficiency.
Claims (4)
1, a kind of copper tube and fin radiating structure of microwave oven magnetron, related magnetron comprises negative electrode, anode and antenna, there is copper sheathing in the anode outside, it is characterized in that, copper tube and fin radiating structure comprises anode copper pipe that connects and the fin that is enclosed within on the copper pipe, the heat of anode is delivered to fin by copper pipe, and the heat of fin is distributed by the air of fan forced flow.
2, copper tube and fin radiating structure of microwave oven magnetron according to claim 1 is characterized in that, described copper pipe one end is welded on the copper sheathing of anode, and the other end is with fin.
3, copper tube and fin radiating structure of microwave oven magnetron according to claim 2 is characterized in that, described copper pipe has the six roots of sensation, is welded in respectively on the copper sheathing of anode, and is with fin respectively.
4, copper tube and fin radiating structure of microwave oven magnetron according to claim 3 is characterized in that, described fin is an aluminium alloy, is parallel to the wind direction of forced flow air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810054095A CN101645383A (en) | 2008-08-08 | 2008-08-08 | Copper tube and fin radiating structure of microwave oven magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810054095A CN101645383A (en) | 2008-08-08 | 2008-08-08 | Copper tube and fin radiating structure of microwave oven magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101645383A true CN101645383A (en) | 2010-02-10 |
Family
ID=41657203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810054095A Pending CN101645383A (en) | 2008-08-08 | 2008-08-08 | Copper tube and fin radiating structure of microwave oven magnetron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101645383A (en) |
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2008
- 2008-08-08 CN CN200810054095A patent/CN101645383A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100210 |