JPS5823A - High-frequency heater - Google Patents

Abstract

PURPOSE:To provide a small-sized high-frequency heater by a method wherein an operating part for feeding a heating information and a display part are arranged at the door of the high-frequency heater. CONSTITUTION:The front surface of a high-frequency heater provided with a source of high-frequency heater having a solid element is constructed only with a feeding-in or a feeding-out door 5b, and the feeding-in or feeding-out door 5b is provided with a display part 3 for the heating information and the input operation keys 7a-7h. The keys 7a-7d perform a feeding-in of the numerical value of each of the digits in the display part 3, the key 7g performs a change- over of a heating mode, the key 7b clears the content of the display and interrupts the heating operation, the key 7g starts to heat, and the key 7h performs a change-over of clock mode/set input. The feeding-in or feeding-out door 5b is composed of a door 16 having a porous screen 12 and a glass screen 14 fixed to the base plate 10 with screws 15, a door 17, screen 18 and door 19, and between the base plate 10 and the door 17 are arranged in a space input operation parts 7a-7h having a display part 3, printed circuit board 23, control signal input switch 24, display tube 25, intermediate rod 30 and a button 29.

Description

[Detailed Description of the Invention] The present invention relates to a high-frequency heating device in which a heating information input operation section and a display section are provided on an access door constituting a heating chamber, and an object thereof is to make the device compact. shall be.

Conventionally, a microwave oven, which is a high-frequency heating device, is provided with an access door and a heating information input operation panel including a display section on the front surface thereof. This is because the magnetron, which is the high-frequency heating heat source, and the large transformer, which is the power source for driving the magnetron, are mounted on the main body, so in addition to the volume of the heating chamber, the space occupied by these element parts is required. A heating information input operation panel was placed to make effective use of the space. However, in order to display heating information using this space, the display space is small, and if characters are displayed, for example, it is difficult to read, and the number of characters is limited to a very small number.

On the other hand, with the remarkable development of semiconductor technology in recent years, solid-state devices capable of high-output operation have appeared even in the microwave region, making it possible to solidify high-frequency heating heat sources. This solid-state element can be driven at a much lower voltage than an electron tube oscillator such as a magnetron, and for example, it is possible to drive the solid-state element by simply rectifying a commercial power source, eliminating the need for a large transformer.

The present invention has been made in view of the above points, and provides a high-frequency heating device having a configuration in which a heating information input operation panel including a display section is disposed on an access door.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a partially cutaway configuration diagram of a conventional high-frequency heating device. Magnetron 1. A heating information input operation panel 4 including a display section 3 is disposed on the front surface of the main body, making use of the space occupied by the transformer 2 serving as the magnetron drive power source. 52L is an entrance/exit door, and 6 is a waveguide.

FIG. 2 is an external configuration diagram of a high frequency heating device showing one embodiment of the present invention. The front part is composed of only an access door 6b, and this access door has a display section 3 and heating information input operation keys 7L, 7b, To, 7d, OK.

7f, -rg, yh are provided. 10,
1 key 7a.

ENDb, 70, yd are keys for entering numerical values for each digit on the display 3, POVER key 7e is a heating mode switching clear and heating interruption key, 5TART key 7g is a heating start key, CLOCK key 7h is a clock mode switching/
This is a set of oysters. 8 is a heating chamber.

9 is a power supply and control signal transmission cable.

FIG. 3 is a sectional view taken along the line AA' of the access door shown in FIG. 2. The entrance/exit door 5b is constructed by stacking the door E1o as a base, a door screen C12 having punched holes 11, and a door screen B14 made of chemically strengthened glass having a rubber band 13 on the outer periphery.
Door B16 and door arm 17. which are integrally assembled by. Door screen A18. It consists of a door 019. The radio wave seal mechanism is screw 2 on door B16.
Conductive rubber 2o fixed with 01 and door E10
A choke space 21 and a radio wave absorber 22 constituted by
It consists of In the access door 5b having the above configuration, a heating information long sword operation section and a display section are incorporated in the space formed by the door arm 17 and the door E10. That is, control signal input switches 249 and display tubes 26 provided at desired intervals are assembled on a printed circuit board 23 having a control circuit, and the printed circuit board 23 is attached to the door 110 with a screw 27 using an insulator 26 as an intermediary. Suboc [&
The control signal input switch is fixed to the printed circuit board fixing plate section which is assembled with f". Also, the control signal input switch is turned on via the intermediary rod 30 by pressing the resin molded button 29 fitted into the door screen 18. be done.

FIG. 4 is a partially cutaway side view of the high-frequency heating device according to an embodiment of the present invention, with the access door open. Drive power transmission to the display unit 3 and control unit provided on the access door 6b and signal transmission between the control unit of the access door and the control unit on the main body side are performed via the power supply and signal transmission cable 9. This power supply and signal transmission cable 9 is arranged in a cable guide 31, and expansion and contraction of the transmission cable due to the opening and closing of the access door is achieved by providing a one-turn loop on the transmission cable as shown in the figure. Absorbing.

32 is a high frequency heating power source 9 display section 3. and a driving power source for the control unit. 33 is a bearing for pulley A34, which is one of the turntable drive systems.

35 is a leg rubber, and 36 is a lead wire.

FIG. 6 is a top view of a high-frequency heating device showing an embodiment of the present invention. On the upper wall surface 37 of the heating chamber, a solid-state element is constructed in close contact with the upper surface of the air guide field, which also serves as a radiator to guide the air generated by the air blower 38 in a predetermined direction (indicated by the arrow in the figure). High frequency heating heat source 40. An interaxial transmission line 41 transmits the high frequency power generated by this high frequency heating heat source to a heating chamber excitation antenna (not shown) provided at a predetermined position on the upper wall surface 37 of the heating chamber to feed the heating chamber. A heating chamber irradiation lamp 43 that irradiates the inside of the heating chamber through the irradiation window 42. A water vapor exhaust window 44 is provided. 45 is a heating chamber excitation antenna support part, 46 is an upper hinge of the access door 6b, 47 is an upper hinge fixing screw, 36 is a lead wire, and 48 is a door operated by a door hook 49 of the access door 6b.

The operation of the high-frequency heating device showing one embodiment of the present invention, the configuration of which has been described above, is summarized as follows. The object to be heated is accommodated in the heating chamber 8, and the access door 5b is closed. (At this time, if the entrance/exit door is closed due to an abnormality, that is, a state in which radio wave leakage is possible, the door latch switch 48 is in the OFF state). Press the heating mode switch key 7e and select the heating information (
After inputting the heating time) using the number keys 7a to 7d,
When the heating start key 7g is pressed, the high-frequency heating heat source 40 is activated, and the object to be heated is high-frequency heated during the input heating time. (At this time, the door latch switch 48 is OFF.
6 is a block diagram of a high-frequency heating device showing another embodiment of the present invention, and FIG. 7 is a sectional view taken along line B-B' in FIG. 6.

This high-frequency heating device has a display section 3 disposed in a peephole taper section 52 of an access door 5C, and has a configuration in which the viewing area of the display section is widened. In the heating information input operation keys 631 to 639 provided on the access door 6C, 63
1 is the time setting key, 1632 to 535 is the numerical value input key for each digit on the display, 9536 is the power key for switching from time mode to heating mode, 2537 is the heating mode selection key, and 538 is the heating time, heating mode selection key. A key 539 is a key for inputting a stop input to reset a set input value or interrupt heating, and a heating start input key. 64 is a viewing window into the heating chamber. As shown in FIG. 7, each input key has a holding part 56 fitted into the door screen X55, an ON-OFF switch 57, and a mediating rod 58.
It is composed of This ON-OFF switch 67° display tube 26 and control circuit (not shown)
is arranged on a flexible printed circuit board 59, and this flexible printed circuit board is fixedly attached to a printed circuit board support plate 61 assembled with the door RX 60 by spot welding. The peep window is Door Screen X55. Door screen BX62. A door screen C having a punching hole is constituted by X63 and a peephole tapered portion 52 of a door arm X64. Door screen BX
62. Door screen CX63 is Door BXet
Door BX is assembled to door EK by screws 66, which are fixed by screws s. Further, the door xxeo forms a choke space 67 having a radio wave sealing mechanism, and functions to shield radio waves leaking from the space formed by the flange portion 69 of the heating chamber 68 and the door BXe6. 7o is a radio wave absorber, and 71 is a resin-processed door aX that covers the choke space 67.

In the above description, the high-frequency heating heat source is constructed using a solid-state element, but the present invention can also be applied to a high-frequency heating heat source using an electron tube oscillator. FIG. 8 is a configuration diagram of a conventional high-frequency heating device, in which FIG. 8-iL is a top view, and FIG. sb is a sectional view taken along line D-D' in FIG. 8-+IL. That is, the front side of the high-frequency heating device has two components: the access door 5a and the operation panel 4, and the flange portion 73 of the heating chamber 72 and the access door 5.
In order to perform the scooping action of a, each plate needs to have a certain degree of flatness. In order to improve the accuracy of flatness, one factor is to eliminate the processing required to attach the operation panel to the flange portion of the heating chamber, and another important factor is to reduce the area of the flange portion. By the way, the size of the operation panel is generally determined by the number of heating information input keys and the size of the display section.In particular, since it depends on the size of the display section, the size of the operation panel is determined by the number of heating information input keys and the size of the display section. The effect produced by providing this is fundamentally the same as that of a high-frequency heating device having a high-frequency heating heat source constructed using solid-state elements.

Further, in one embodiment of the present invention, the display section is illustrated as a fluorescent display tube, but the display section is not limited to this, nor is the configuration and mechanism of the operating section.

Furthermore, although the display content on the display unit shows numbers in one embodiment of the present invention, it also includes katakana and kanji.

Configure the front section to display characters such as alphabets and Roman characters 1. τ blind - Provides a high-frequency heating device equipped with an operation section for inputting information and a display section for displaying heating information and heating information that changes as the heating time elapses. By providing a display section on the door, it is possible to make the display section larger, making it easier to see the display contents, and making it possible to display multiple characters.

(2) Conventionally, two resin molded products were required, one for the access door and the operation panel, but one molded product can be used for the access door, reducing costs and shortening the manufacturing process.

(3) Regarding measures for radio wave sealing, processing on the mechanism (especially processing of the heating chamber flange portion) becomes easier, and the reliability of the radio wave sealing mechanism is further improved.

(4) The high-frequency heating device can be made more compact, requiring less installation space.

(By providing the display section on the tapered part of the peephole, the viewing area of the display section is increased, making it easier to use.

(@ By using a high-frequency heating heat source using solid-state elements, it can be made more compact and lightweight in terms of volume and weight, and it can have a long service life and improve cooking performance.

It has the following effects.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway configuration diagram of a high-frequency heating device showing a conventional example, FIG. 2 is an external configuration diagram of a high-frequency heating device showing an embodiment of the present invention, and FIG. 3 is an access door shown in FIG. 2. FIG. 4 is a partially cutaway side view of a high-frequency heating device showing an embodiment of the present invention with the door open, and FIG. 6 is a cross-sectional view of a high-frequency heating device showing an embodiment of the present invention. Top configuration diagram of the heating device,
Figure 6. FIG. 7 is a block diagram and a sectional view taken along line B-B' of a high-frequency heating device showing another embodiment of the present invention, FIG. 8 is a block diagram of a high-frequency heating device showing a conventional example, and FIG. 8a is a top view. FIG. 8 is a sectional view taken along the line D-D' of FIG. 8a. 1... Magnetron (high frequency heating heat source), 3.
...Display section, sa, sb, sc... Door, 7a. 7b, 7c, 7a, 715.7f, 7g, 7h
---Heating information input operation keys -18, 68,' 7
2...Heating chamber, 24, 57...ON
-OFF switch, 26...Display tube, 40...
・・・High-frequency heating heat source constructed using solid-state elements,
62... Peephole taper part, 531, 532.
5331634.535.53Q 537.538.5
39-- Heating information input operation key, 64...
・Peeping window. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure @4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (3)

[Claims] (1) In a high-frequency heating device equipped with a high-frequency heating heat source and a heating chamber, there is an operation section for inputting heating information to the door for entering and exiting the heated object constituting the heating chamber, and an operation section for inputting heating information and the elapsed heating time. A high-frequency heating device characterized by comprising a display section that displays heating information that changes depending on the timing. (2) The high-frequency heating device according to claim 1, wherein the display section is provided in a tapered section of a peephole of an access door. (3) The high-frequency heating device according to claim 1, wherein the high-frequency heating heat source is constructed using a solid-state element.