JPS59219894A - High frequency heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a high frequency heating device for electric heaters such as ovens and microwave ovens.

Conventional configuration of ψ11 and its problems In toaster ovens and the like, when the door of the heating chamber is opened, the net shelf or saucer on which the food is placed is pulled out to the front.
Some devices are designed to make it easier to place and take out food, but the height of the rack should be higher than that of the upper and lower heaters so that the heat from the electric heaters installed above and below the rack can be evenly received. located at approximately equal intervals, and whose position (
The structure is such that the height cannot be changed. That is, in general, the heating chamber is partitioned into upper and lower parts at the center, and a mesh shelf is provided, which poses a problem in that the size of the food that can be placed on the mesh shelf is limited.

On the other hand, in electric ovens, etc., there are those with a number of grooves that allow the rack or saucer to be placed on a multi-level shelf holder installed on the side wall of the heating chamber. Although it has the advantage of not having restrictions on size and height, it does have the problem that the shelves cannot be inserted or removed when the door is opened or closed. Furthermore, some microwave ovens with an electric heating device have a rotating saucer and a mesh shelf is placed on the rotating saucer, but it goes without saying that the opening/closing of the door and the interlocking movement of the saucer and the mesh shelf are not possible. could not.

Generally, when baking bread, etc., it is necessary to bake it evenly on both sides. The net shelf to be placed on is placed in a position that receives heat evenly from the upper and lower heaters, and in the case of high-frequency heating, since food is often handled in containers, it is placed in a position that can secure the height to accommodate the containers. It is required that a shelf be provided in the Increasing the distance between the net shelf and the upper heater in order to meet both of these requirements requires a relatively large amount of heat generated by the upper heater, and it is necessary to increase the space available for the heating chamber. There were problems such as.

For the above reasons, it has been extremely uneconomical and impractical to have a high-frequency heating device equipped with electric heaters on the top and bottom in which the cooking food table has a pull-out structure and whose height can be selected depending on the heating application.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, and provides a high-frequency heating device that has means for moving the cooking food table in and out in conjunction with the opening and closing of the door, and that allows the height to be selected depending on the heating application. With the goal.

Structure of the Invention In order to achieve the above object, the high frequency heating device of the present invention is provided with a sliding body equipped with permanent magnets that mutually attract each other inside and outside the wall surface of the heating chamber, and the sliding body on the outer wall is moved in conjunction with the opening and closing of the door. Before and after/
The sliding body on the inner wall has two net shelves on the upper and lower levels, and the height of the upper net shelf can be changed by a link mechanism provided on the left and right sliding bases of the sliding body. It is configured to be at the same height as the net shelf, and has an operating rod for driving the link mechanism at the tip of either the left or right sliding base of the sliding body, and has a relatively simple structure.
It is possible to change the height of the table on which food is placed so that the height can be selected depending on the heating application, and the heating chamber can be the same size as conventional ones, making it extremely easy to put food in and take out food. It is.

I will explain.

In FIG. 1, a heating chamber 2 is provided within a high-frequency heating device 1, and a high-frequency wave is transmitted into the heating chamber 2 from an opening 6 provided in a ceiling surface 5 using a high-frequency generator 3 such as a magnetron and a waveguide 4. lead. Reference numerals 7 and 8 are electric heaters provided above and below the heating chamber 2, respectively. Note that the lower heaters 7 are arranged in two rows in parallel so as to avoid the opening 6. 9 is an upper rack on which food is placed.

The upper rack 9 receives heat from the upper and lower heaters 7 and 8 for cooking 2. For example, when used for baking bread, it is at the height shown in the figure and receives heat equally from the upper and lower heaters 7.8. be able to. By changing the distribution of the output of the electric heaters 7.8, the height of the mesh shelf 9 does not necessarily have to be at the center of the heating chamber 2, but if the food to be cooked is too close to the heater, the heater may Because it is a type heat source and the food is irradiated with strong direct radiation, it may cause undesirable results such as linear burn marks, and it may not be uniform over the entire area of the food, including heat rays due to reflected waves from the ceiling and bottom. In order to obtain proper heating, it is appropriate to have a structure in which the food to be cooked can be placed near the center of the heating chamber 2.

FIG. 2 is a partial sectional view showing the details of the sliding table 1o on which the net shelf 9 is placed, and this sliding table 10 is attached to the left and right heating chamber wall surfaces 1o.
a [Provided closely and symmetrically. A guide 11 made of a material such as heat-resistant resin or ceramics is provided inside the heating chamber wall surface 2a, and the sliding table 10 slides back and forth by this guide 11. 12 is a permanent magnet, sliding table 1o
A non-magnetic metal case of one color is installed in a part of the case. If the material of the permanent magnet 12 is a ferrite magnet, it absorbs high frequencies and generates heat at a temperature close to one Curie point or higher, which may cause the magnetic force to be lost. It has shielding against high frequencies. Depending on the material of the permanent magnet, some permanent magnets do not generate heat due to high frequencies, and in this case, the metal case 13 is unnecessary.

On the outside of the heating chamber wall 2a, there is a magnet 16'' (i7) that can be slid back and forth by a guide 15.The magnet 16 consists of a permanent magnet 1 and a metal cover 18, and the metal cover 18 is made of a magnetic material such as a steel plate. The heating chamber wall 2a side is open and the outside is closed, which also serves to prevent leakage of magnetic flux to the outside. Reference numeral 19 denotes an arm connected to the door, and a pin 20 connects the magnet to the door. 21 is a return spring, one end of which is fixed to the rear wall of the heating device 1. As shown in the figure, two magnets 1
2.17 are opposed to each other with the heating chamber wall 2a in between, and the magnetic poles on the opposing surfaces are different and attract each other. The heating chamber wall 2a and the guide 16 are made of a non-magnetic material, for example, an austenitic stainless steel plate.

That is, the magnet body 16 slides forward against the barbs 21 that open the door, and returns to its original position when the door is closed.

The sliding table 10 has an arm 2 that is swingable about a shaft 22 as a fulcrum.
3, and a protrusion or pin 24 on which the net shelf 9 is placed is provided at its tip.

As shown in FIG. 2, FIG. 3, FIG. 4, and FIG. 6, the arms 23 are provided at the front and rear of the sliding table 1o.
An operating rod 25, which is configured to move together with the sliding table 10, protrudes from the front end of the slide table 10.

The operating rod 25 is a guide groove 2 provided on the front end surface of the sliding table 1o.
6, the tip of the arm 23 can be moved up and down by pushing the operating rod 25 downward, and by pushing the operating rod 25 upwards as shown by the broken line in FIG.
The tip of number 3 descends.

Therefore, the net shelf 9 placed on the tip pin 24 also moves up and down. Note that there is a protrusion 26a (i7) below the guide groove 26 that locks the operating rod 26, and prevents the net shelf 9 from naturally descending due to the weight of the cooking items and the net shelf 90. In other words, when cooking by high-frequency heating, the lower rack screen 27 is placed at the position where the upper rack is placed.As shown in FIG. If only the net 9 is used, it may tilt as shown by the broken line and cause the container to spill the cooking money, but as shown in FIG. 7, the container can be stabilized by the lower screen 27.

On the other hand, it is possible to make the upper screen 9 finer and eliminate the lower screen 27, but in the case of heating with an electric heater, the heat from the lower heater 8 is blocked by the metal wires forming the screen, which is not preferable. In the case of electric heater heating, cooking is carried out with the upper grate 9 at the highest position, so the lower grate 27 does not directly touch the food and does not block the heat from the electric heater 8. Note that the metal wires constituting the upper screen 9 are also corrugated to minimize the number of parts that come into contact with the food to be cooked. FIG. 8 shows the relationship between the upper screen 9 and the lower screen 27.
consists of a plurality of parallel wavy metal wires 28, and the lower net 27
The wavy metal wire 29 of the same aircraft also consists of the wavy metal wire 2 of the upper row.
The lower wavy metal wire 29id is arranged so as to be perpendicular to the crest 288 of No. 8 and the lower wavy metal wire 29id. In addition,
In FIG. 8, the lower screen 27 indicated by a broken line indicates the relative position when the upper screen 9 is at its highest position.

FIG. 9 shows a second embodiment, in which the upper shelf is also movable and detachable, with pins 24 on which the upper net 9 is placed.
The first arm 23a having an angle θ and the second arm 23b extending downward at an angle θ are integrated. The second arm 23,b [is provided with a pin 3o on which the lower screen is placed.

Also, both the highest and lowest positions of the pin 24 have a dimension of 2 with respect to the horizontal line passing through the center of the shaft 22 of the first arm 23a.
, and there is no displacement in the front-rear direction in the upper and lower positions of the upper screen 9. Also, the first arm 23a and the second arm 23
By setting the angle θ with b to 90°, the lower mesh moves in parallel. Further, in the first embodiment, the means for interconnecting the arms provided before and after the slide table 100 is only the upper net 9, and the arm 23 on the driving side
There is also a possibility that the arm on the driven side does not swing in the same direction and moves back when it passes completely near the horizontal line passing through the center of the shaft 22. According to the second embodiment, this drawback can be prevented by the second arm 23b, and the movements of the front and rear arms can be reliably matched.

As described above, according to this embodiment, first, the net shelf 9 on which food is placed can be taken in and out in conjunction with the opening and closing of the front opening door.
It is extremely convenient for placing and taking out food, and is safe when all parts are at room temperature after cooking. Next, in the case of cooking using the upper and lower electric heaters 7.8, it is recommended to move the placing table downward to maximize the height of the food to be placed. can. Also,
At that time, in order to stably place frequently used containers such as tea bowls, the parallel metal wires 2B and 29 of the upper and lower two-tiered upper and lower mesh shelves 9 and 27 are arranged orthogonally, and each metal The wire can be formed into a wavy shape, and the crests 28a and 2Qai of the wavy shape can be made to have the same height. Moreover, the height of the net shelf can be changed by one-touch operation of the operating rod 26 provided at the front end of the sliding table 10. By swinging the arm 23 on which the net shelf is placed equally up and down from the horizontal line passing through its axis fulcrum 22, the upper net 9 that moves up and down is not displaced in the front and back direction, so it does not hit the back wall or door of the heating chamber. There is no.

Also, the upper net shelf 9. Since the lower screen shelf 27 is also removable, it can be removed and washed even if there is dirt on the food to be cooked, and the bottom of the heating chamber can be cleaned.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) The heated object mounting table can be taken in and out by opening and closing the door, which is extremely convenient for placing and taking out the heated object, and the operation of taking out the heated object is safe and there is no risk of burns.

(2) The mounting net shelf can be removed, making it easy to wash and clean, and the heating chamber can always be kept clean.

(3) When heating with electric heaters, the net shelf can be set to the highest position, and the heat from the upper and lower electric heaters can be applied evenly to the object to be heated, making effective use of heat amount and heating time. .

(4) In the case of high-frequency heating, the heated object mounting table can be set at the lowest position, eliminating restrictions on the height of the container and the heated object. That is, the height of the heated object mounting table can be arbitrarily set depending on the heating application.

(6) The height of the net shelf in (3) and (4) above is changed by a simple up and down operation of the operating lever at the front of the sliding table, which is extremely easy and reliable.

(6) When high-frequency heating is performed with the upper screen at the lowest position, the stability of the container on the screen shelf is increased by orthogonally arranging each corrugated metal wire with the lower screen.

Moreover, the mesh structure of the corrugated metal wire minimizes the contact area with the object to be heated, thereby reducing heating unevenness during electric heating.

(7) By placing the net shelf on it and swinging the arm that moves downwards evenly up and down, there is no front-to-back shift of the net shelf, and even if the depth of the net shelf is changed to the heating chamber, it will not hit the front or back direction. do not have.

[Brief explanation of the drawing]

FIG. 1 is a front view including a partial cross section of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional view of the vicinity of a sliding table of the same high-frequency heating device, and FIG. 3 is a side view of the same sliding table. Figure 4 is a front view of the sliding table, Figure 5 is a cross-sectional view of the arm portion of the sliding table, and Figures 6 and 7 are cross-sectional views showing the stable state of the container during high-frequency heating. 8 is a partial external perspective view showing the vertical relationship of the net shelves of the same device, and FIG. 9 is a partial side view of a sliding table of a high-frequency heating device according to another embodiment of the present invention. 2... Heating chamber, 7... Upper electric heater,
8...Double electric heater, 9...Upper screen, 1
0...Sliding table, 12.17...Permanent magnet, 23...Arm, 26... -Operation rod, 27
...Lower net. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 27

Claims (1)

[Scope of Claims] (1) Sliding bodies made of permanent magnets that attract each other in opposite directions are provided on the inside and outside of the heating chamber wall surface made of non-magnetic material, and the sliding bodies on the outer wall of the heating chamber are interlocked with the opening and closing of the door. The heating inner wall slides back and forth, and the sliding body of the heating inner wall is at the same height as the height-changeable upper screen for placing the heated object and the second screen at the lowest position. A high-frequency heating device consisting of a lower screen arranged in the upper and lower tiers, and a sliding table close to the left and right walls for supporting the two-tiered screen and the lower tier mesh, and electric heater metals are arranged above and below the upper and lower tier nets, respectively. . (2) Each of the left and right sliding bases of the sliding body on the wall of the heating chamber is provided with a link mechanism that changes the height of the net shelf, and the operating rod that drives this link mechanism is attached to the front end of either the left or right of the sliding base. A high-frequency heating device according to claim 1, which is provided in claim 1. (3) At the highest position of the first stage screen, the heated object to be placed receives radiant heat from the upper and lower electric heaters equally, and at the lowest position it is placed farthest from the upper electric heater. A high-frequency heating device according to claim 1, wherein the high-frequency heating device is arranged as follows. (4) an upper net consisting of multiple parallel corrugated metal wires;
and a lower net consisting of a corrugated metal wire arranged orthogonally to the corrugated peaks of the plurality of tubes of metal wire of the upper net, and with the peaks located in the middle between the metal wires of the upper net. 2. The high-frequency heating device according to claim 1, wherein the tops of the crests of the upper mesh and the tops of the ridges of the lower mesh at the lowest position are at the same height. (6) A protrusion on which the upper net is placed is provided at the tip of the first arm, which is swingable with supporting points at the front and rear sides of the left and right sliding bases, respectively, and the highest and lowest positions of the protrusion are A second arm is configured to be equidistant from a horizontal line passing through the center of the fulcrum and extends downward in a direction perpendicular to the first arm. 2. The high-frequency heating device according to claim 1, wherein a protrusion for placing and supporting the lower screen is provided at the tip of the second arm.