JP3966365B2 - High frequency heating device - Google Patents

Description

  The present invention relates to cooling of a high frequency generator.

  A conventional high-frequency heating device will be described with reference to the drawings. 3 is a cross-sectional view of a conventional high-frequency heating device, and FIG. 4 is a vertical cross-sectional view of the conventional high-frequency heating device.

  As shown in FIGS. 3 and 4, a blower 3 is provided between the main body 1 and the heating chamber 2 having a hole 2 </ b> A above the side, and a sensor 4 is provided between the upper side of the heating chamber and the main body 1. The cover 5 is fixed with screws or the like, and is provided so as to be protected from noise. The cover 5 has a detection hole 5 </ b> A for the sensor 4 to detect the temperature of the object to be heated 14, and a flange is used to detect the cooling air from the upper surface of the heating chamber 2 and the blower 3 in order to ensure the detection performance of the sensor 4. 4 is attached to the air guide 6 that is fed into the housing 4 with screws or the like. Reference numeral 15 denotes a high-frequency heating device in which the sensor 4 detects the temperature of the object to be heated 14 when the high-frequency wave oscillated from the high-frequency oscillation device 9 is guided into the heating chamber 2 through the waveguide 13 and heated. Although the detection range when controlling is shown, it is easier to detect the temperature of the food itself contained in the container when the sensor 4 is located above the side of the heating chamber 2 and the detection performance is improved. Here, when the heater 7 for heating the object 8 provided on the upper surface of the heating chamber 2 generates heat, the conduction heat transmitted from the upper surface of the heating chamber 2 to the sensor 4 through the cover 5 and the hot air inside the heating chamber 2 are heated. Since the thermal stability of the sensor 4 is impaired by the fluid heat transmitted through the hole 2A on the side of the chamber 2 and the detection hole of the cover 5, the cooling air from the blower 3 is supplied to the surface of the cover 5 via the blower guide 6. It was possible to secure the cooling performance of the sensor 4 by directly reducing the heat of conduction and putting cooling air into the detection hole 5A of the cover 5.

  In addition, when the object to be heated 14 is heated by the high-frequency oscillation device 9, the air blower 3 is used to ensure the cooling performance of the sensor 4 from the conduction heat from the heating chamber 2 and the fluid heat from the inside of the heating chamber 2 as described above. Cooling air is sent to the surface of the cover 5 and the detection hole 5A of the cover 5 to cool it.

  However, in the conventional configuration, if the sensor is provided at a higher position on the side of the heating chamber in order to improve the food temperature detection performance of the sensor, or if the heater and the high-frequency heating performance are improved, the sensor is passed from the heating chamber through the cover. The amount of conduction heat transmitted to the inside of the heating chamber and the amount of fluid heat entering from the inside of the heating chamber through the hole on the side of the heating chamber and the detection hole of the cover increase, and the cooling performance of the sensor cannot be ensured. In addition, when the amount of cooling air of the blower is increased to solve the above problem, the cooling air enters the inside of the heating chamber from the hole on the side of the heating chamber, and the heated object is partially deprived of heat and impairs the cooking performance. He also had problems.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a high-frequency heating device that efficiently cools a sensor with cooling air that has passed through a blower guide from a blower and improves the cooling performance of the sensor. .

In order to solve the above-described conventional problems, a high-frequency heating device of the present invention includes a main body, a heating chamber for heating an object to be heated that is provided inside the main body and has an opening on the front surface, the main body, and the heating chamber. A blower provided between the heating chamber, a sensor provided above the heating chamber for detecting the heating state of the object to be heated and controlling the high-frequency heating device, and the sensor enveloping the sensor and the sensor heating the object to be heated A cover having a detection hole for detecting a situation, and a blower guide for blowing cooling air sent from the blower device into the cover, the cover being provided with an inlet for the cooling air at the bottom, and The detection hole is provided on the heating chamber side with the sensor provided in the cover in between, and the exhaust port is provided on the opposite side of the heating chamber, and the cooling air blown into the cover is sent to the detection hole and the Excretion Are a structure which is discharged from the mouth.

  As a result, the cooling air sent from the blower through the blower guide enters the inside from the intake port at the bottom of the cover, flows around the sensor, and is gently discharged from the exhaust port and the detection hole at the top of the cover.

  As described above, according to the present invention, the cooling performance of the sensor when the detection performance of the sensor, the heater heating, and the high-frequency heating performance are improved can be ensured without impairing the cooking performance.

The invention according to claim 1 is a main body, a heating chamber for heating an object to be heated which is provided inside the main body and has an opening on the front surface, a blower provided between the main body and the heating chamber, A sensor provided above the heating chamber for detecting the heating state of the object to be heated and controlling the high-frequency heating device, and a detection hole for the sensor to detect the heating state of the object to be heated while having a shape surrounding the sensor. And a cover for blowing cooling air sent from the blowing device into the cover, and the cover is provided with an inlet for the cooling air at a lower portion and the sensor provided in the cover. said detection hole to the heating chamber side during the, the heating chamber is provided an exhaust port on the opposite side, there the cooling air blown into the cover a configuration for discharging from said detection hole and the exhaust port Cooling air sent blown instrumentation placed we will be gradually discharged around the sensor enters the inside from the air inlet of the lower cover from the cooling to the cover of the exhaust port and the detection hole, the cooling performance of the sensor is improved At the same time, even if the amount of cooling air is increased, the cooling air does not enter the hole of the heating chamber, so that the cooking performance can be stabilized.

  Embodiments of the present invention will be described below with reference to the drawings. The same reference numerals as those used in the conventional example are the same components.

Example 1
FIG. 1 is a cross-sectional view of a high-frequency heating device according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the same. In FIG. 1, solid arrows indicate the flow of cooling air from the blower 3. Further, description will be made with reference to FIG. 4 which is a conventional example. The same reference numerals as those of the conventional example have the same structure, and detailed description thereof is omitted.

1 and 2, 1 is a main body, and 2 is a heating chamber having a hole in a side portion. A heater 7 is provided in the upper part of the heating chamber 2. Between the main body 1 and the heating chamber 2, a machine room 11 including an electric component 10 that drives the high-frequency oscillator 9 and a blower 3 that cools the electric component 10 is configured. A sensor 4 that detects the temperature of the object to be heated and controls the high-frequency heating device during high-frequency heating is fixed to the side of the heating chamber 2 with a screw or the like inside the cover 5. The cover 5 has a detection hole 5A and a suction port 5B for the sensor 4 to detect the temperature of the object to be heated at the lower part, and an exhaust port 5C at the upper part, and is configured to wrap the sensor 4 to protect it from noise. The portions other than the detection hole 5A, the intake port 5B, and the exhaust port 5C are in a sealed state. The cover 5 has one flange fixed to the upper part of the heating chamber 2 in order to ensure the detection performance of the sensor 4, and the other flange is fixed to the air guide 6 that blows cooling air sent from the air blower 3. Has been. 12 is a partition plate that partitions the space formed by the heating chamber 2 and the cover 5, and is partitioned so as to send the cooling air sent from the blower 3 to the air inlet 5 </ b> B below the cover 4. Metal, resin, etc. are used for the material.

  About the high frequency heating apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the cooling air sent from the blower 3 is all sent along the partition plate 12 to the intake port 5 </ b> B below the cover 5 through the blower guide 6. The cooling air that has entered the inside of the cover 5 is gently discharged from the detection hole 5 </ b> A and the vent hole 5 </ b> C of the cover 5 while rectifying the periphery of the sensor 4 and cooling the sensor 4. Since the cooling air at the time of discharge passes through the inside of the cover 5 to which the sensor 4 is fixed, the wind speed is lower than that when the cooling air passes between the heating chamber 2 and the cover 5 when the partition plate 12 is not provided. The discharged cooling air rises through the space between the heating chamber 2 and the cover 5 without entering the hole 2 </ b> A of the heating chamber 2.

  As described above, in the present embodiment, the partition between the heating chamber 2 and the cover 5 by the partition plate 12 allows the cooling air sent from the blower 3 to be sucked into the lower part of the cover 5 along the partition plate 12. The sensor 4 can be efficiently cooled while being wrapped with cooling air by being fed into the inside through the port 5B and discharged from the lower detection hole 5A and the upper ventilation hole 5C of the cover 5, thereby ensuring the cooling performance of the sensor 4. Further, the cooling air discharged from the inside of the cover 5 enters the hole 2A on the side of the heating chamber 2 when the detection performance of the sensor 4, the heater heating, and the high-frequency heating performance are improved and the cooling air volume of the blower 3 is increased. Therefore, the cooling performance of the sensor 4 can be ensured without impairing the cooking performance without impinging the cooling air on the object 8 to be heated.

  In this embodiment, the partition plate 12 is a single component. However, the same effect can be obtained even if the partition plate 12 is constituted by a part of the air blowing guide 6.

Cross-sectional view of the high-frequency heating device in Example 1 of the present invention External perspective view of the high-frequency heating device Cross-sectional view of a conventional high-frequency heating device Longitudinal sectional view of the high-frequency heating device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Heating chamber 3 Air blower 4 Sensor 5 Cover 5A Detection hole 5B Intake port 5C Exhaust port 6 Blower guide 7 Heater 8 Heated object a
9 High-frequency oscillator (magnetron)
10 Electrical components (control board)
11 Machine room 12 Partition plate 13 Waveguide 14 Object to be heated b
15 Detection range

Claims (1)

A main body, a heating chamber for heating an object to be heated provided in the main body and having an opening on the front surface, a blower provided between the main body and the heating chamber, and a heating target provided above the heating chamber A sensor for detecting the heating state of the object and controlling the high-frequency heating device, a cover having a shape for enclosing the sensor and having a detection hole for the sensor to detect the heating state of the object to be heated; A cooling guide that blows the cooling air to be blown into the cover, and the cover is provided with an inlet for the cooling air at a lower portion, and the sensor provided in the cover is interposed between the sensor and the heating chamber. A high-frequency heating apparatus having a configuration in which the detection hole is provided with an exhaust port on a side opposite to the heating chamber, and cooling air blown into the cover is discharged from the detection hole and the exhaust port.

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