JPS5960129A - Cooling air supplying duct for magnetron - Google Patents

Abstract

PURPOSE:To provide a magnetron which is compact and can improve a cooling efficiency, by utilizing the air supplying duct of magnetron as a heat dissipating fin. CONSTITUTION:In a cooking utensil such as an electronic oven and the like, when a micro-wave heating is initiated, a cooling fan begins rotating and is turned to an ON position simultaneously for thereby supplying a cooling air to a magnetron 1 in the arrow marked direction A through a first opening 7', the magnetron 1 being adapted to radiate a micro-wave inside an oven 8 from an antenna 5 via a wave guide tube 4. Thereby, the exothermic action of magnetron 1 is suppressed, while at the same time the air used to cool the magnetron 1 is supplied from a second opening 7'' to the oven 8 through a cooling air duct 7 for removing gaseous elements such as a steam and a gas etc., that are produced from a foodstuff during its micro-wave heating operation to a space outside the cooking utensil. The steel plate of cooling air duct 7 formed around the magnetron 1 constitutes a magnetic circuit for the magnetron 1, while at the same time serving the function of radiator to dissipate the heat generated from a high frequency oscillating section 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling structure for a Macnetron.

Conventionally, the Macnetron used in cooking appliances such as microwave ovens has a large number of radiation fins installed in the magnetron's casing, and by applying cooling air blown by a blower motor to the radiation fins, the magnetron can be moved to the desired position. It was cooled to a certain temperature and operated stably.

Therefore, since the shape of the magnetron main body requires a casing and heat radiation fins, the size of the magnetron body has to be a certain degree, and the size of the air duct that guides the cooling air has also become considerably large.

The present invention has been made in view of a series of points, and eliminates the conventional structure in which the magnetron body is placed inside a ventilation duct, thereby making the magnetron body compact and cooling the magnetron efficiently. It provides structure.

The present invention is characterized in that the casing and heat radiation fins of the magnetron are removed and the air blower tact is used as a heat radiation fin in order to achieve two objectives, and the magnetron and air duct are made smaller. be.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a top view showing a cooling structure of a McNetron according to an embodiment of the present invention, and FIG. 2 is a W side view as seen from the cooling air suction side in FIG. 1.

In the figure, reference numeral 1 denotes a magnetron consisting of a high-frequency oscillation part 2, a macnet 3 attached in a sandwich shape at both ends of the oscillation part, and an antenna 5 for radiating microwaves to the waveguide 4 side. is a power supply terminal of a magnetron L protruding in the opposite direction to the antenna 5. Reference numeral 7 designates a cooling ventilation duct for the magnetron 1, in which the antenna 5 and power terminal 6 of the magnetron 1 are protruded to the outside, and the high frequency oscillation unit 2 and magnet 3 are arranged inside.

- Although not shown, the cooling air duct 7 has a first open lower lower part through which air flows from the direction of arrow A by a cooling fan that operates while the magnetron 1 is energized, and the magnetron 1.
The air blowing after cooling the oven 8 is shown by arrow B.
It is made of a steel plate with a thickness of about 0.8M and is fixed to the waveguide 4 with screws 9. Although not shown, a large number of punching holes are formed in the second opening lower part to prevent the microwaves radiated into the oven 8 from leaking.
The steel plate of the cooling air duct 7 formed around the magnetron 1 constitutes the magnetic circuit of the magnetron 1 and also functions as a radiator that radiates heat generated from the high frequency oscillation section 2.

Next, the operation of the embodiment of the present invention having the above configuration will be explained.

When microwave heating is started in a cooking device such as a mass cooker or a microwave oven, a cooling fan (not shown) starts rotating and is turned on at the same time, radiating microwaves from the antenna 5 through the waveguide 4 into the oven 8. magnetron 1
The heat generation of the magnetron 1 is suppressed by applying cooling air in the direction of the arrow Δ from the first open lower ′ to the magnetron 1 , and the wind after cooling the magnetron 1 passes through the cooling air duct 7 and exits the second open lower ′. 17'' into the oven 8 and discharges gaseous components such as steam and gas generated from the food during microwave heating to the outside of the cooking appliance.

In this way, the cooling air duct 7 not only guides the air necessary for microwave heating into the oven, but also has the function of cooling the magnetron 1.

As explained above, the present invention is a magnetron cooling air duct that serves as a heat radiation part for cooling the magnetron main body and a duct that guides air that supplies air into the oven. In addition, since there is no need to provide a casing for the Macnetron with radiation fins formed thereon, the magnetron main body can be made smaller, and the high-temperature heat generated during magnetron oscillation can be efficiently cooled by the cooling air duct. Therefore, it has a high practical value as it functions as a radiator for a magnetron.

[Brief explanation of the drawing]

FIG. 1 is a two-sided view showing a cooling structure of a magnetron showing an embodiment of the present invention, and FIG. 2 is a front view of FIG. 1. 1: Macnetron, 2: High frequency oscillator, 3: Magnet, 4: Waveguide, 5: Antenna, 7: Cooling air duct,
7': first opening, 7'': second opening. 8: oven.

Claims (1)

[Claims] 1. An air blowing tact for cooling a magnetron, characterized in that a heat dissipation part for cooling the main body of the magnetron also serves as a duct for guiding air to be supplied into the oven.