JPH0141194Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> The present invention cools each magnetron and each transformer in a two-tube microwave oven equipped with two magnetrons and two transformers for supplying power to them. Regarding a cooling device.

<Prior art> As shown in Fig. 1, the conventional cooling system for a two-tube microwave oven is a system in which two magnetrons and their transformers are cooled separately by two systems of air flow using two Sirotskov fans. Ta. Therefore, two Shirotsuko fans are required, as well as two systems of transformer intake ducts and magnetron intake ducts.As the number of these ducts increases, the shape becomes complicated and assembly is difficult, resulting in high costs. This is becoming a factor. Moreover, the need for many ducts leads to an increase in size, and the cooling efficiency decreases, making it particularly difficult to cool a high-pressure transformer.

<Purpose of the invention> The object of the present invention is to provide a cooling device for a two-tube microwave oven that eliminates the drawbacks of the above-mentioned prior art, has a small number of parts, and can improve the cooling effect with a simple configuration.

<Structure of the invention> In the present invention, as a technical means for achieving the above-mentioned object, a cooling device for a two-tube microwave oven is constructed as follows. That is, in a device for cooling each magnetron and each transformer in a two-tube microwave heating system that includes two magnetrons and two transformers for supplying power to them, , the magnetrons are arranged at predetermined intervals, and between the two magnetrons, an intake port is provided on the bottom surface and at least two air outlets are perforated on the side surface, and a single centrifugal fan is housed inside. A fan case is attached in a fitted state with each of the blow-off ports facing each of the magnetrons, and an exhaust duct that communicates with the outside is individually provided on a surface of each of the magnetrons opposite to the blow-off ports. The transformers are arranged at intervals below the air intake ports on the floor of the electrical component storage chamber, and a plurality of outside air The structure is characterized by having an inlet.

<Operation> When the centrifugal fan rotates, the air in the electrical component storage chamber is sucked into the fan case from the intake port,
The air is blown directly onto each magnetron from the air outlet to cool each magnetron, and then exhausted to the outside through an exhaust duct.

Outside air is drawn from the suction port into the electrical component storage chamber, which has a negative pressure due to the drive of the centrifugal fan, and this cold outside air is drawn from around each transformer, so that each transformer is sufficiently cooled.

This cooling system uses a single centrifugal fan to
2 magnetrons and 2 transformers can be cooled. In addition, by using the fan case of the centrifugal fan as the intake duct for each magnetron, and by providing an outside air intake port around each transformer, the intake duct for each transformer is no longer required, greatly reducing the number of ducts. has decreased to Also,
Since the high-voltage transformer is cooled by directly blowing cold outside air, a sufficient cooling effect can be obtained.

<Example> Figure 2 is a diagram showing the flow of cooling air in the present invention.
FIG. 3 is a vertical cross-sectional view schematically showing the internal configuration of the two-tube microwave oven of the embodiment, and FIG. 4 is a diagram of the internal configuration of FIG. 3 viewed from the right side.

The microwave oven has an oven interior 1 for heating and cooking objects to be heated, and an electrical component storage chamber 2 adjacent thereto. The oven chamber 1 is provided with a waveguide opening 3 and a stirrer fan 4 on the ceiling, and the electrical component storage chamber 2 is equipped with two magnetrons 5, 6,
Two transformers 7 and 8 and other electrical components (not shown) are provided. The magnetrons 5 and 6
are arranged on the ceiling of the electrical component storage room 2 with an interval slightly larger than the horizontal dimension of a fan case to be described later, and a centrifugal fan 9 is provided between them. A fan case 10 of the centrifugal fan 9 is attached so as to fit exactly between the magnetrons 5 and 6. Air is taken into the centrifugal fan 9 through an intake port 10a provided on the lower surface of the fan case 10. On the other hand, the fan case 10 blows air to each magnetron 5 and 6.
This is done by providing air outlets 10b, 10b on the side wall of the. The magnetrons 5 and 6 are not provided with an intake duct, and receive air directly from the air outlets 10b and 10b of the fan case 10, which also serves as the intake duct. The wind passing through the magnetrons 5 and 6 is sent to the magnetron exhaust ducts 11 and 1 provided on the leeward side thereof.
2 is exhausted to the outside. 5a and 6a are waveguides of magnetrons 5 and 6, respectively. Further, 9a is a motor of the centrifugal fan 9. fan case 10
Further, an air outlet 10c (see FIG. 3) to the oven interior 1 is provided which also serves as an air intake duct to the oven interior 1, and in this case, the stirrer fan 4 is rotated by the blown air. In this way, in the present invention, a centrifugal fan 9 is provided in a position close to the two magnetrons 5 and 6 and the oven interior 1, and the centrifugal air from the centrifugal fan 9 is transferred to the fan case 10.
Since the air is blown directly from the air outlets 10b and 10c provided in the air, there is no need for a suction duct.

Transformers 7 and 8 for supplying power to each magnetron 5 and 6 are installed in a floor section 13 below the centrifugal fan 9.
Place them side by side. And both magnetrons 5 and 6
An outside air inlet 14 is provided between the space and the surrounding floor 13,
14 will be provided. The suction port 14 is connected to the electrical component storage chamber 2, which has become under negative pressure due to the rotation of the centrifugal fan 9.
Cold air is sucked in from the transformers 7 and 8.
The transformers 7 and 8 are sufficiently cooled because the air flows to the intake port 10a of the centrifugal fan 9 through the surrounding area.

<Effects of the invention> As described above, according to the two-tube microwave oven cooling device of the invention, a fan case housing a single centrifugal fan is connected to each magnetron through two air outlets provided on the sides of the fan case. Since the magnetrons were installed in a fitted state between each magnetron, the fan case also functioned as an intake duct for each magnetron, and the two transformers installed below the intake ports on the bottom of the fan case. Since multiple outside air intake ports are provided around each transformer, there is no need for intake ducts for each transformer, which greatly reduces the number of ducts and greatly improves ease of assembly.

In addition, air is blown directly to each magnetron from the outlet of the fan case, and each transformer is directly blown with cold outside air introduced from the outside air inlet around these magnetrons, so there is no need to blow air through a duct like in conventional equipment. Cooling efficiency is significantly improved compared to

However, since only a single centrifugal fan is required for cooling two magnetrons and two transformers, the number of ducts mentioned above is greatly reduced, and the ease of assembly is greatly improved. It is possible to achieve significant cost reductions.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the flow of cooling air in the conventional device, Figure 2 is a diagram showing the flow of cooling air in the device of the present invention, and Figure 3 is a schematic diagram of the internal configuration of the two-tube microwave oven of the embodiment. The vertical sectional view, FIG. 4, is an internal configuration diagram of FIG. 3 viewed from the right side. 1... Inside the oven, 2... Electrical parts storage room,
5, 6... Magnetron, 7, 8... Transformer,
9...Centrifugal fan, 10...Fan case, 10
a...Intake port, 10b, 10c...Blowout port, 12
...exhaust duct, 13...floor, 14...intake port.

Claims (1)

[Scope of utility model registration request] In a device for cooling each magnetron and each transformer in a two-tube microwave oven equipped with two magnetrons and two transformers for supplying power to each magnetron, the Each magnetron is arranged at a predetermined interval, and between the two magnetrons, a fan case is provided with an intake port on the bottom surface and at least two air outlets on the side surface, and a single centrifugal fan is housed inside. are attached in a fitted state with each of the air outlets facing each of the magnetrons, and an exhaust duct that communicates with the outside is individually provided on a surface of each of the magnetrons opposite to the air outlet. , the transformers are arranged at intervals below the air intake ports on the floor of the electrical component storage chamber, and a plurality of outside air intake ports are arranged around each of the transformers on the floor. A cooling device for a two-tube microwave oven, characterized in that the cooling device is provided with a 2-tube microwave oven.