JP3870554B2 - High-frequency heating apparatus and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for attaching an electrical component to the bottom of a heating chamber in an oven microwave oven, particularly a high-frequency heating apparatus configured to provide a machine room in which electrical components are arranged in a lower portion of a heating chamber.
[0002]
[Prior art]
Conventionally, this type of high-frequency heating device has been described in the microfilm of Japanese Utility Model Application No. 60-64640 (Japanese Utility Model Application No. 61-180489).
[0003]
As shown in FIG. 7, a tubular tube heater 2a is provided on the upper wall surface 1a of the heating chamber 1, and a planar surface heater 2b is provided on the bottom wall surface 1b, and a heat insulating plate for blocking the heat of the surface heater 2b. 3 is provided below. A motor 5 that rotates the turntable 4 is attached to the heat insulating plate 3 via a mounting plate 6a in order to avoid heat conduction from the surface heater 2b. A magnetron 7 serving as a high-frequency generating means is coupled to a waveguide 8 attached to the heating chamber rear wall 1 c, and the high frequency is guided into the heating chamber 1 by the waveguide 8. The propeller fan 9 of the blower device and the inverter 10 of the power supply unit are attached to the bottom plate 11 constituting the bottom surface of the device main body by attachment plates 6b and 6c, respectively.
[0004]
The bottom plate 11 and the back plate 12 of the main body exterior are provided with an intake port 13 and an exhaust port 14, and cooling air 15 enters from the intake port 13 of the bottom plate 11 as indicated by an arrow, and the motor 5, the inverter 10, and the magnetron 7 are connected. Cooled and discharged from the exhaust port 14 of the back plate 12.
[0005]
FIG. 8 is a perspective view showing a method of assembling the apparatus main body. In the state where the apparatus main body is inverted, the surface heater 2b and the heat insulating plate 3 are arranged outside the heating chamber bottom wall surface 1b, and the mounting plate 6a is mounted thereon. The attached motor 5 and magnetron 7 are attached. Next, the bottom plate 11 with the propeller fan 9, the inverter 10, and the control unit 16 attached to the attachment plates 6b, 6c, and 6d, respectively, is disposed. Next, the unitized bottom plate 11 is reversed and attached to the apparatus main body. Thereafter, the hinge 17 was attached to the bottom plate 11.
[0006]
FIG. 9 is a detailed cross-sectional view of the attachment portion of the hinge 17.
[0007]
The end surface of the hinge 17 is inserted and held in the cut and raised portion 11a of the bottom plate 11, and is fixed by two mounting screws 18a and 18b. When the mounting screws 18a and 18b were removed, the hinge 17 fixed to the bottom plate 11 was also removed.
[0008]
[Problems to be solved by the invention]
However, the conventional high-frequency heating device has a problem that the serviceability is poor because the base plate to which the components are attached must be removed and the door hinges must be adjusted each time when replacing the electrical components. It was.
[0009]
In addition, since all the electrical components are mounted on the bottom plate, the mounting plate for the electrical components will block the air intake and the intake efficiency from the bottom plate will deteriorate, or parts such as partition plates will not be added to prevent water leakage from the heating chamber. did not become. Furthermore, there has been a problem that it is necessary to increase the strength by increasing the plate thickness or preventing the deformation at the time of dropping by adding a diaphragm.
[0010]
Also, in the manufacturing process, there is a problem that the electrical components are arranged on the bottom plate and then inverted and attached to the apparatus main body.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has a machine room arranged below the heating chamber, unitizing electrical components on a box-shaped electrical component mounting plate and attaching them to the bottom of the heating chamber. The supporting hinge portion is also fixed to the flange portion of the electric component mounting plate.
[0012]
Furthermore, the coupling portion boundary surface in the heating chamber located above the high-frequency generating means coupled to the heating chamber is configured to be positioned higher than the lowermost end of the heating chamber opening.
[0013]
According to the above invention, the electrical components are arranged on the electrical component mounting plate as a unit, so that the assemblability is good, and the components can be replaced without adjusting the hinge just by removing the bottom plate, so the serviceability is also good. In addition, the intake efficiency from the bottom plate can be improved, and the water resistance and impact resistance are also improved.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
High-frequency heating apparatus according to the present onset Ming, it provided a heating chamber for heating an object having an opening on the front, and a machine room having electrical components for driving the apparatus main body separately, at the bottom of the heating chamber A high-frequency heating apparatus provided with the machine room, the machine room comprising at least an electrical component mounting plate for partitioning the heating chamber and the machine room and mounting electrical components, and a bottom plate constituting a bottom surface of the apparatus body; and The electric component can be easily replaced by removing the bottom plate.
[0015]
And since it is possible to easily replace the electrical component by attaching the electrical component on the electrical component mounting plate and removing the bottom plate, the assembly of the apparatus main body, the serviceability at the time of component replacement are good, such as when dropped Damage to internal electrical components due to external impact can be reduced, and intake efficiency from the bottom plate can be improved.
[0016]
In addition , a heating chamber having an opening on the front surface for heating an object to be heated and a machine chamber having electric parts for driving the apparatus main body are provided separately, and the machine chamber is arranged in the lower portion of the heating chamber. The machine room includes an electrical component mounting plate for partitioning at least the heating chamber and the machine room and mounting electrical components, and a bottom plate constituting a bottom surface of the apparatus body, and is opened and closed at a front opening of the heating chamber. There is a freely provided door and a hinge part that pivotally supports the door. The hinge part is fixed to a flange extending from the electrical component mounting plate, and the hinge part is attached even if the bottom plate is removed. The structure does not change.
[0017]
And, even if the bottom plate is removed, the attachment state of the hinge part does not change, so parts in the machine room can be replaced regardless of the adjustment of the hinge, and serviceability is improved. It is also possible to avoid problems such as radio wave leakage from around the door.
[0018]
In addition , a heating chamber having an opening on the front surface for heating an object to be heated and a machine chamber having electric parts for driving the apparatus main body are provided separately, and the machine chamber is arranged in the lower portion of the heating chamber. In the apparatus, the machine room includes at least an electric component mounting plate for partitioning the heating chamber and the machine room and attaching an electric component, and a bottom plate constituting a bottom surface of the apparatus main body. The other boundary portion of the chamber is coupled to the outside of the heating chamber by the coupling means, and the boundary surface of the coupling portion in the heating chamber located above the high-frequency generating means coupled to the heating chamber is the lowermost end of the heating chamber opening It is set as the structure located higher than.
[0019]
And since the joint part interface in the heating chamber located above the high-frequency generating means coupled to the heating chamber is located higher than the lowest end of the heating chamber opening, from the joint to the electrical component Intrusion of liquid can be prevented.
[0020]
Further , the electrical component is characterized by having at least a power supply unit for driving the blower and the high frequency generating means.
[0021]
In addition , the electrical component is unitized on the electrical component mounting plate side, and then mounted on the outside of the bottom wall surface of the heating chamber.
[0022]
Further , the electric component mounting plate is an inverted U-shaped box shape.
[0023]
Further , the heating chamber is configured to be heated by an electric heating means configured between the bottom of the heating chamber and the electric component mounting plate.
[0024]
Further , the manufacturing method is such that the apparatus main body is inverted and the electric components are unitized on the electric component mounting plate, arranged on the bottom of the apparatus main body, and the bottom plate of the main body exterior is mounted thereon.
[0025]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0026]
Example 1
FIG. 1 shows a side cross-sectional view of a high-frequency heating device according to Embodiment 1 of the present invention. 2A and 2B are detailed cross-sectional views of the coupling portion of the high-frequency heating device.
[0027]
In FIG. 1, a tubular tube heater 2a is provided on the upper wall surface 1a of the heating chamber 1, and a planar surface heater 2b is provided on the bottom wall surface 1b. The magnetron 7 as the high frequency generating means is attached to a flange portion 19 extending downward from the heating chamber rear wall 1c. The high frequency is guided to the heating chamber 1 by the waveguide 8 installed on the rear wall surface 1c of the heating chamber. The propeller fan 9 of the blower device and the inverter 10 of the power supply unit are arranged in a suspended state by mounting plates 6b and 6c on an inverted U-shaped box-shaped electric component mounting plate 22, respectively. The heating chamber bottom wall surface 1b is covered from the outside on a flange 19 portion extending downward from the wall surface 1c and a flange 20 portion extending downward from the heating chamber front wall surface 1d. The motor 5 for driving the turntable 4 is attached to the electrical component mounting plate 22 via the mounting plate 6a in order to avoid heat conduction from the surface heater 2b.
[0028]
By doing so, the electric component mounting plate 22 also serves as a heat insulating plate that blocks heat from the surface heater 2b.
[0029]
Further, when the user accidentally spills the liquid into the heating chamber 1, the liquid flows from the coupling portion 21 that is joined by caulking with the heating chamber bottom wall surface 1b and the front wall surface 1d / rear wall surface 1c / side wall surface as a joining means. Even if it penetrates, since the electrical component has the box-shaped flange 22a of the electrical component mounting plate 22, the liquid does not penetrate the electrical component.
[0030]
However, in the high frequency heating apparatus in which the magnetron 7 of the high frequency generating means is attached to the flange 19 portion extending downward from the heating chamber rear wall surface 1c as in the present invention, the magnetron 7 is coupled to the heating chamber rear wall surface 1c. Therefore, the flange 22a of the electric component mounting plate 22 cannot prevent the liquid from entering the magnetron 7 part. Therefore, the connecting part 23 of the heating chamber bottom wall surface 1b and the rear wall surface 1c above the magnetron 7 is connected to the heating chamber opening 24. Since the liquid spilled into the heating chamber 1 by making it higher than the lowermost end flows out from the opening 24 without accumulating on the heating chamber bottom wall surface 1b, liquid intrusion into the magnetron 7 part can be prevented. Here, FIGS. 2a and 2b are detailed sectional views of the connecting portion 23. As shown in FIG. 2b, the rear wall surface 1c of the heating chamber is squeezed, and the bottom wall surface 1b is accommodated in the squeezed portion to prevent liquid from entering. The effect is increased.
[0031]
The higher the connecting portion 23 is, the more effective, but the caulking or weldability of the connecting portion as the joining means becomes worse, so about 10 mm is optimal.
[0032]
In addition, when it is desired to simplify the caulking / welding structure of the coupling portion 23, there is also a method in which a cushion rubber is attached to the upper portion of the magnetron 7 to directly prevent liquid from entering the magnetron 7.
[0033]
The magnetron 7, propeller fan 9, inverter 10, and motor 5 described above are housed in a box-shaped electrical component mounting plate 22 and constitute a machine room 25 with a bottom plate 11 that forms the bottom surface of the apparatus main body. This machine room 25 is preferably as small as possible because the machine body is taller than the conventional machine room constructed on the side of the heating chamber, but in reality it is more than the height where the magnetron 7 is placed horizontally. Since it cannot be made small, the optimum dimension is 80-100 mm at present. The surface heater 2b can also be the tubular tube heater 2a used for the upper wall surface 1a, but it is more advantageous to use the surface heater 2b in order to reduce the height. is there.
[0034]
By doing so, the height is slightly higher than in the past, but the width can be reduced by the machine room of the conventional high-frequency heating device, and a compact product can be provided. Installation is improved and the appearance is improved.
[0035]
The bottom plate 11 and the back plate 12 of the main body exterior are provided with an intake port 13 and an exhaust port 14, and cooling air 15 enters from the intake port 13 of the bottom plate 11 as indicated by an arrow, and the motor 5, the inverter 10, and the magnetron 7 are connected. Cooled and discharged from the exhaust port 14 of the back plate 12. Since the electrical parts are not arranged on the bottom plate 11, the intake port 13 opened in the bottom plate 11 is not blocked by the mounting plates 6b and 6c of the electrical parts, so that the aperture ratio is increased and the cooling performance is improved. .
[0036]
Furthermore, since the electrical parts are not attached to the bottom plate 11 as in the prior art, the bottom plate 11 does not have to be thickened to prevent deformation when dropped, or it is not necessary to increase the strength by adding a diaphragm. Even if the bottom plate 11 is damaged by an external impact received during distribution, the electrical components in the machine room 25 are less likely to fail.
[0037]
(Example 2)
FIG. 3 is a side sectional view of the high-frequency heating device according to the second embodiment of the present invention.
[0038]
The second embodiment is different from the first embodiment in that there is no flange on the rear surface side of the electrical component mounting plate 22. As shown in FIGS. 2a and 2b, the joining portion 23 of the heating chamber bottom wall surface 1b and the rear wall surface 1c in the upper part of the magnetron 7 is made higher than the lowermost end of the heating chamber opening 24 to prevent liquid from entering the magnetron 7. Because it can.
[0039]
In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0040]
By doing so, the material for the electrical component mounting plate 22 can be reduced, so that the cost can be reduced.
[0041]
(Example 3)
FIG. 4 is a side sectional view of the high-frequency heating device according to the third embodiment of the present invention.
[0042]
The second embodiment is different from the first embodiment in that a planar surface heater 2b disposed outside the heating chamber bottom wall surface 1b is disposed as a rod-shaped sheathed heater 2c inside the heating chamber bottom wall surface 1b. It is that. In addition, the thing of the same code | symbol as Example 1 has the same structure, and abbreviate | omits description.
[0043]
By doing so, the effective dimension of the heating chamber 1 is reduced, but since the machine chamber 26 can be reduced by the thickness of the surface heater 2b, this is an effective means when it is desired to reduce the height of the apparatus main body in terms of design.
[0044]
FIG. 5 is a perspective view showing an assembling method of the high-frequency heating device according to the first embodiment. 6A and 6B are detailed sectional views of the attachment portion of the hinge 17 of the high-frequency heating device.
[0045]
In FIG. 5, a planar surface heater 2b is disposed outside the heating chamber bottom wall surface 1b with the apparatus main body inverted. Next, the propeller fan 9, the sirocco fan 26, the inverter 10, and the control unit 16 of the blower mounted on the mounting plates 6b, 6c, and 6d are arranged on the electrical component mounting plate 22 to form a unit. This unitized product is mounted on the surface heater 2b.
[0046]
Next, the motor 5 disposed on the magnetron 7 and the mounting plate 6 a is mounted on the electric component mounting plate 22.
[0047]
Here, the magnetron 7 and the motor 5 may also be unitized on the electrical component mounting plate 22, but the motor 5 must be fixed to the main body to stabilize the turntable 4, and the high frequency leakage prevention, so the screws are reduced. As a configuration to be installed later.
[0048]
Next, the bottom plate 11 of the main body exterior is attached, and then the hinge 17 is attached to the flange 22b extending from the electric component attaching plate 22.
[0049]
Here, the end surface of the hinge 17 is inserted and held in the cut-and-raised portion 22c of the electrical component mounting plate 22 as shown in FIG. 6a, and is fixed by two mounting screws 27a and 27b. The bottom plate 11 on the side of the mounting screw 27a is a hole, and even when the bottom plate 11 is removed as shown in FIG. 6b, the hinge 17 is fixed to the flange 20 of the front wall 1d of the heating chamber with the mounting screw 27a, and the end surface is cut. Since it is inserted and held in the raising portion 22c, the fixed state does not change.
[0050]
Therefore, in this embodiment, the electric parts can be unitized, and the work of inverting the unitized electric part mounting plate 22 is eliminated, so that the number of work steps and the productivity can be greatly improved. Moreover, since the components in the machine room 25 can be replaced by removing the bottom plate 11, serviceability is improved. Further, since the parts in the machine room 25 can be replaced regardless of the adjustment of the hinge 17, the serviceability is improved and there is a problem such as leakage of radio waves from the periphery of the door 28 which occurs due to an insufficient adjustment of the hinge at the time of service. Can be avoided.
[0051]
【The invention's effect】
High-frequency heating apparatus according to the present onset bright As described above, attaching the electrical component to the electrical component mounting board, and since the easy replacement of the electrical component by removing the bottom plate may serviceability during parts replacement In addition, it is possible to reduce the damage to the internal electrical components due to external impacts such as when dropped, and to improve the intake efficiency from the bottom plate.
[0052]
In addition , even if the bottom plate is removed, the hinge mounting state does not change, so it is possible to replace parts in the machine room regardless of the adjustment of the hinge, improving serviceability, and inadequate hinge adjustment during service. There is an effect that it is possible to avoid problems such as radio wave leakage from the surrounding door.
[0053]
Further, since the coupling portion boundary surface of the heating chamber which is located above the high-frequency generating means coupled to the pressurized heat chamber is to be located higher than the lowest end of the heating chamber opening, the heating chamber incorrectly user Even when the liquid is spilled into the inside, there is an effect that the intrusion of the liquid from the caulking or welded portion into the magnetron can be prevented.
[0054]
Also, electricity since the gas component mounting plate are reversed U-shaped box-shaped, even if the spilling fluid to the heating chamber inside user accidentally, liquid to the electrical components of electrical component mounting inner plate of the box-shaped Since there is no intrusion, there is an effect that the insulation of the electrical parts does not deteriorate.
[0055]
Further, since the configuration pressurized Netsushitsu is heated by electric heating means on the formed surface between the bottom and the electrical component mounting board of the heating chamber, it is possible to reduce the height of the apparatus main body, where the There is an effect that a compact product that cannot be taken can be provided.
[0056]
Further, it disposed in the apparatus main body bottom in a state of being unitized instrumentation Okimoto body inverted electrical component mounting board electrical components and, since the configuration method of manufacturing of attaching the bottom plate of the main body outer thereon, facilitate electrical components Thus, there is no need to reverse the unitized electric component mounting plate, which has the effect of reducing work man-hours and greatly improving manufacturability.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of a high-frequency heating device according to a first embodiment of the present invention. FIG. 2 (a) A detailed cross-sectional view of a coupling portion of the high-frequency heating device. FIG. 3 is a side sectional view of a high-frequency heating device according to a second embodiment of the present invention. FIG. 4 is a side sectional view of a high-frequency heating device according to a third embodiment of the present invention. FIG. 6A is a detailed cross-sectional view of the hinge mounting portion of the high-frequency heating device. FIG. 7B is a detailed cross-sectional view of the hinge mounting portion of the high-frequency heating device. FIG. Side sectional view of the heating device [FIG. 8] Perspective view showing the assembly method of the high frequency heating device [FIG. 9] Detailed sectional view of the hinge mounting portion of the high frequency heating device [Explanation of symbols]
1 Heating chamber 7 Magnetron (high frequency generation means)
9 Propeller fan (blower)
10 Inverter (power supply)
DESCRIPTION OF SYMBOLS 11 Bottom plate 17 Hinge 19 Flange part 22 Electrical component attachment plate 23 Connection part 24 Opening part 25 Machine room 28 Door

Claims (8)

A high-frequency heating apparatus in which a heating chamber having an opening on the front surface for heating an object to be heated and a machine chamber having electric parts for driving the apparatus main body are provided separately, and the machine chamber is arranged below the heating chamber. The machine room includes at least an electrical component mounting plate for partitioning the heating chamber and the machine room and mounting electrical components, and a bottom plate constituting a bottom surface of the apparatus main body, and a bottom surface portion of the heating chamber is the heating unit. A joint boundary surface in the heating chamber that is coupled to the other surface portion of the chamber by the joining means outside the heating chamber and located above the high-frequency generating means coupled to the heating chamber is the lowermost end of the heating chamber opening A high-frequency heating device configured to be positioned higher than that . A pressurized heat chamber door which openably provided in the front opening of having a hinge portion for supporting the door, the hinge unit is fixed to the flange extending from the electrical component mounting board, the bottom plate The high-frequency heating device according to claim 1, wherein the attachment state of the hinge portion does not change even when the hinge portion is removed. The high-frequency heating device according to claim 1, wherein the electric component can be easily replaced by removing a bottom plate .   The high-frequency heating device according to any one of claims 1 to 3, wherein the electric component has at least a power supply unit that drives the blower and the high-frequency generating means.   The high-frequency heating device according to any one of claims 1 to 4, wherein the electrical component is unitized on the electrical component mounting plate side and then mounted on the outside of the bottom wall surface of the heating chamber.   The high-frequency heating device according to any one of claims 1 to 4, wherein the electric component mounting plate has an inverted U-shaped box shape.   The high-frequency heating device according to any one of claims 1 to 4, wherein the heating chamber is heated by an electrothermal heating unit configured between a bottom portion of the heating chamber and an electric component mounting plate.   5. The apparatus according to claim 1, wherein the apparatus main body is inverted and arranged on the bottom of the apparatus main body in a state where the electric components are unitized on the electric component mounting plate, and the bottom plate of the main body exterior is mounted thereon. Of manufacturing the machine room of the high-frequency heating apparatus.

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