JPS60263033A - High-frequency heating device - Google Patents

Abstract

PURPOSE:To obtain the highly reliable high-frequency heating device without causing any malfunction which may be caused in case the device is used without employing a temperature probe by a method wherein a ventilating path is formed in the rotary support mechanism of the temperature probe and a heat transfer plate is provided on the ventilating path. CONSTITUTION:A jack 11 for the rotary support device of temperature probe 7 is formed with a ventilating path 27, opposing to the penetrating hole 20 of the probe and equipped with a ventilating hole 26 communicated with the outside of an oven chamber, and the heat transfer plate 28 is provided thereon. When the device is used as an electronic range without employing the temperature probe, water vapor, generated from a substance 6 to be heated, passes through the oven chamber from the penetrating hole 20 through the ventilating path 27 and the ventilating hole 26 to the outside of the chamber, therefore, dewing will never be generated and contact pieces 24A, 24B, having contact pieces 23A, 23B equipped with electricity outputting sections 22A, 22B, will never be conducted by water drops. On the other hand, the water vapor, passes the oven chamber through the ventilating hole 26 to the outside of the chamber, collides against the heat transfer plate 28 and, therefore, dewing will never be caused.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-frequency heating device having a temperature globe for detecting the temperature of an object to be heated by the high-frequency heating device.
This improves the malfunction that occurs when used without a temperature probe.

Structure of a conventional example and its problems FIGS. 1 and 2 are schematic cross-sectional views of the structure of a conventional high-frequency heating device with a temperature globe provided with a jack on an oven top plate. A motor 2 is provided at the bottom of the oven 1, and the motor 2 is driven by a rotary shaft 3, which rotates a turntable 6 supported by rollers 4, on which food 6 is placed and heated by microwaves. 7 is inserted into the food 6 to transmit temperature information via a cable 9 and a plug 1o, and 11 is an oven top plate 1A corresponding to the central axis that is the center of the turntable 5.
The plug 1o of the temperature probe 7 is held by a spring metal plate 3, and the electric output terminal The terminal 14a is also pressed against the sleeve 15 so as to output an electrical signal to the electrical output terminal 14b, each of which is separated by an insulator 16. A vibrator 17 made of resin ensures quadruple sliding and smoothness, and the jack 11 rotates. The steam generated when the food 6 is heated is discharged into the room through the looper 18A of the body 18 through the exhaust hole 1B of the oven top plate 1A. FIG. 2 shows that the temperature probe 7 is removed from the temperature probe mounting section and the object to be heated 6 is used as a normal microwave oven. At this time, the temperature probe 7
The jack 11 of the temperature probe rotation support device is directly exposed to the steam of the heated object and oil 1 food juice generated in the heating chamber, especially since the inside of the rotation support mechanism (jack) 11 is in a sealed configuration. , always filled with steam 7, a springy metal plate 13. Rust and dirt adhere to the sleeve 15° insulator 16, resulting in an increase in contact resistance and a decrease in insulation resistance. When the temperature globe 7 function is required, if a temperature probe is inserted and connected, contact resistance increases and insulation resistance decreases, making it impossible to transmit accurate electrical signals to the temperature control circuit disposed outside the oven. In severe cases, problems such as loss of continuity may occur. In addition, the jack 1 of the rotation support mechanism
1 is filled with steam and at the same time condensation water is generated, and the spring metal plate 13. Water droplets adhere to the sleeve 16 and the insulators 1 to 6, and the water droplets connect the spring metal plate 13 and the sleeve 15, creating a resistance value at the electrical output terminals 14A and 14B, and connecting the temperature probe to the outside of the oven. is detected by the control circuit of the microwave oven, causing a malfunction that stops normal microwave oven operation. Furthermore, normal microwave oven operation cannot be performed until the water droplets are no longer connected. Furthermore, since the inside of the jack 11 of the rotary support device is in a sealed state, water droplets evaporate slowly, resulting in a major problem in that it takes a long time to return to normal operation.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks by a simple method, and provides a highly reliable high-frequency heating device that does not malfunction.

Structure of the Invention In order to achieve the above object, a glove insertion hole, a ventilation hole communicating with the outside of the oven, and a ventilation path are formed in the temperature probe rotation support mechanism, and a heat transfer plate is provided on the ventilation path.

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

FIG. 3 is a schematic cross-sectional view of a high-frequency heating device with a temperature probe equipped with a rotation support mechanism and a heat transfer plate according to the present invention. A motor 2 is provided at the bottom of the oven 1, and the motor 2 is driven by a rotating shaft 3. A turntable 6 supported by rollers 4 is rotatably disposed, and an object to be heated 6 is placed on the turntable 6 and heated by microwaves. Reference numeral 11 denotes a jack of a rotation support device for the temperature probe 7 fixed via a nut 19 at or near the center axis of the oven top plate 1A corresponding to the center axis of the turntable 6. The jack of the rotation support device has a sleeve 2 provided with an insertion hole 20 for the temperature probe 7.
1 and an electric output section 22a.

Spherical contact 23+ with 22b! It consists of plate spring contact pieces 24a and 24b with L and 23b, an insulator body 25 that fixes them, and a sleeve 21.
I am completely confused. Body 25 is temperature globe 7
A ventilation hole 26 that corresponds to the insertion hole 20 and communicates with the outside of the oven.
A ventilation passage 27 is formed, and a heat transfer plate 28 is provided on the ventilation hole 26 and the ventilation passage 27. 1B is a steam exhaust hole on the oven top plate 1A, 18 is a body, 18b is a steam exhaust louver, and a partition plate 29 divides the flow of steam.
, Fucoita 301 and foot rubber 31 are shown, respectively.

If you use it as a microwave oven without using the temperature probe 7, you will be directly exposed to the steam of the object to be heated 6 and the oil 1 food juice generated in the heating chamber, but the steam will be directly exposed to the temperature probe 7.
Since the plug 10 passes through the ventilation passage 27 through the insertion hole 2° and exits from the ventilation hole 26 to the outside of the oven, there is little condensation, and the electric output is $22A and 22B.
Leaf spring contact pieces 24A, 24B with children 23A, 23B
However, water droplets will not cause conduction and will not cause malfunction. Furthermore, if the steam passing through the ventilation passage 27 and exiting from the ventilation hole 26 to the outside of the oven directly hits the body 18, condensation occurs due to the temperature difference with the body 18, forming large water droplets.
It falls into the oven from the upper part of the jack 11 of the rotation support mechanism or the ventilation hole 26. In addition, when falling outside the oven, water drops hit the contacts 23A and 23B and accumulate inside the jack 11, but since the heat transfer plate 28 is provided on the ventilation path 27, condensation occurs even when steam hits. Therefore, the above problem does not occur. Also, contactor 23A.

Since 23B is spherical, it is difficult to get t5 leakage. Further, when the temperature probe 7 is inserted, the plug 1o scrapes and removes dirt, so that a stable electrical output can always be produced.

FIG. 4 shows another embodiment in which an absorbent material 32 such as a cushion rubber for absorbing steam is provided on the back surface of the body 18 above the ventilation passage 2 of the jack 11, and the effect is similar to that described above. It absorbs steam from the ventilation passage 21 of the jack 11 and prevents water droplets from falling.

Effects of the Invention As described above, according to the high frequency heating device with a temperature probe of the present invention, the temperature probe 7 can be detached from the temperature probe mounting section, and the temperature probe can prevent malfunctions that occur when the object to be heated is used as a normal microwave oven. A plug insertion hole, a ventilation hole communicating with the outside of the oven, and a ventilation path are formed in the rotation support mechanism, and a heat transfer plate or an absorbent material is provided on the ventilation path to prevent steam, oil, food juice, etc. generated from the heated object. This is a highly reliable high-frequency heating device that eliminates malfunctions caused by dirt.

[Brief explanation of drawings]

FIG. 1 is a half-sectional view when a conventional temperature glove is used, FIG. 2 is a half-sectional view when a conventional microwave oven is used, and FIG. 3 is a half-sectional view when an embodiment of the present invention is used in a microwave oven. FIG. 4 is a half sectional view of another embodiment of the present invention when the microwave oven is used. 11... Jack, 2o... Plug insertion hole, 26... Ventilation hole, 27... Ventilation path, 28... Heat transfer plate , 32...absorption plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 188 15f

Claims (1)

[Claims] The detection part of the temperature probe is inserted into an object to be heated on a table provided in the oven, and the magnetron is controlled based on the detected temperature, and has an electrical output terminal that detachably supports the temperature globe. A high-frequency heating device comprising: a plug insertion hole through which a probe is inserted into the terminal; a ventilation hole through which the plug insertion hole communicates with the outside of the oven; and a jack forming a ventilation path; and a heat transfer plate is provided on the ventilation path.