JPH027895U

JPH027895U -

Info

Publication number: JPH027895U
Application number: JP8640288U
Authority: JP
Priority date: 1988-06-29
Filing date: 1988-06-29
Publication date: 1990-01-18

Description

[Brief explanation of drawings]

第１図ないし第６図はこの考案の一実施例を示
し、第１図は要部となる高圧トランスを冷却した
後の冷却風を回路基板に当てる流路構造を示した
第３図中、―線に沿う側断面図、第２図はマ
グネトロンを冷却した冷却風と高圧トランスを冷
却した冷却風とを混合して外部に出す流路構造を
示す第３図中、―線に沿う側断面図、第３図
は機械室内に設置した冷却構造を示す平断面図、
第４図は排気ダクト体を示す斜視図、第５図は冷
却構造の分解斜視図、第６図は電子レンジの外観
を示す斜視図、第７図は従来の電子レンジの冷却
構造を示す側断面図、第８図は異なる冷却構造を
示す平断面図、第９図はその冷却構造の側断面図
、第１０図は冷却風を外部に排出する排出ダクト
体を示す斜視図である。１……本体、２……加熱室、２ａ……扉、２ｂ
……操作パネル、２ｃ……制御基板、２ｄ……電
子機器（制御回路）、３……機械室、４……マグ
ネトロン、５……高圧トランス、８……ダクト、
９……冷却フアン、１１ａ，１１ｂ……吸気口、
１３……排気ダクト体、１４……箱体（合流室）
、１５……接続口（第１の通路）、１６……排気
口体、１７……バイパスダクト（第２の通路）、
１８，１９，２２……仕切壁、吹出口（引出路）
、２０……外部排気口、２１……庫内排気口。 Figures 1 to 6 show an embodiment of this invention, and Figure 1 shows a flow path structure for applying cooling air to a circuit board after cooling a high-voltage transformer, which is the main part. Figure 2 is a side cross-sectional view along the - line. Figure 3 shows the flow path structure that mixes the cooling air that cools the magnetron and the cooling air that cools the high-voltage transformer and outputs it to the outside. Side cross-section along the line. Figure 3 is a plan cross-sectional view showing the cooling structure installed in the machine room.
Fig. 4 is a perspective view showing the exhaust duct body, Fig. 5 is an exploded perspective view of the cooling structure, Fig. 6 is a perspective view showing the external appearance of the microwave oven, and Fig. 7 is a side view showing the cooling structure of a conventional microwave oven. 8 is a plan sectional view showing a different cooling structure, FIG. 9 is a side sectional view of the cooling structure, and FIG. 10 is a perspective view showing a discharge duct body for discharging cooling air to the outside. 1...Main body, 2...Heating chamber, 2a...Door, 2b
...Operation panel, 2c...Control board, 2d...Electronic equipment (control circuit), 3...Machine room, 4...Magnetron, 5...High voltage transformer, 8...Duct,
9...Cooling fan, 11a, 11b...Intake port,
13... Exhaust duct body, 14... Box body (merging room)
, 15... Connection port (first passage), 16... Exhaust port body, 17... Bypass duct (second passage),
18, 19, 22...Partition wall, outlet (outlet path)
, 20...external exhaust port, 21...internal exhaust port.

Claims

[Scope of utility model registration request]

An operation device comprising a main body with a built-in heating chamber, a machine room consisting of a space surrounded by a wall of the heating chamber and a wall of the main body, and a control circuit disposed within the machine room. A circuit board of the panel, a duct provided in the machine room whose inlet communicates with the outside of the main body, a cooling fan for introducing outside air into this duct, a high voltage transformer installed in the duct, and the duct. and an exhaust duct body attached to the magnetron, the exhaust duct body having a first passage communicating with the duct through the magnetron, and an exhaust duct body independent of the first passage. a second passage that directly communicates with the duct; a merging chamber that is provided at the outlet of the first passage and the second passage and communicates with the outside of the main body; and a blowout path for blowing out a part of the air that cools the high-voltage transformer flowing through the path to the circuit board.