JP2586268B2 - High frequency heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toaster range type high frequency heating apparatus.

[0002]

2. Description of the Related Art Generally, in a toaster range type high frequency heating apparatus, for example, an automatic toast menu key is pressed according to the number of breads to automatically set a heating amount and bake, or a number of breads is set. There is a method of estimating and determining the number of breads from the total weight of the bread in the refrigerator using a weight sensor and baking the bread.

However, in the toaster range of the type in which the number of sheets must be specified, the number of key operations is increased accordingly, which is inconvenient, and the number of sheets is determined by the weight sensor based on the total weight of the bread in the refrigerator. An erroneous determination based on a difference in bread size, thickness, and water content is inevitable.

For this reason, for example, the number of breads is accurately determined by providing a number determining means having a dedicated light emitting unit and a light receiving unit for the purpose of determining the number of breads.

[0005] When baking bread, a net-shaped turntable made of a heat-resistant member such as an enamel is used, and one or two breads are placed on the turntable and rotated, and the whole is uneven. There is a rotary baking method in which the bread is baked uniformly, and a method in which up to four breads can be baked at a time by a fixed method, for example.

[0006]

However, if the number-of-pans judging means provided with the above-mentioned dedicated light emitting section and light receiving section is provided, the number of parts increases, and the structure, processing and assembly become complicated, resulting in high cost. There are problems that can be a problem. this is,
Particularly, it is not preferable for a low-priced product such as a toaster range.

Further, in the case of the type in which the turntable is rotated and baked, if the bread is not properly placed, the bread hits the wall surface of the heating chamber during rotation and stagnates, causing uneven baking. There is.

Further, without rotating the turntable, 4
In the case of a type of baking a large number of breads up to about one sheet at the same time, even when a small number of breads such as one or two are baked, the whole of the heater section generates heat, and there is a problem that more power is consumed than necessary. is there.

[0009]

Means for Solving the Problems The inventions described in claims 1 to 3 of the present application have been made for the purpose of solving the above problems, respectively, and have the following structures. Have been.

(1) Structure of the invention according to claim 1 The high-frequency heating apparatus according to the invention according to claim 1 is a turntable for placing and rotating a toasting pan in a heating chamber provided with a heater, and a heating value of the heater. A toaster range-type high-frequency heating device comprising: a heater control means for controlling the inside of the turntable; and a light receiving unit for receiving light from the inside lamp and illuminating the inside of the heating chamber through the turntable. Further, a number determining means for determining the number of breads on the turntable from the output state of the light receiving section is provided, and the amount of heat generation control of the heater by the heater control means is made variable according to the determination result of the number determining means. It is characterized by having done.

(2) Structure of the invention according to claim 2 The high frequency heating apparatus according to the invention according to claim 2 is a turntable for placing and rotating a toast pan in a heating chamber provided with a heater, and turning the heater ON and OFF. In a toaster range type high-frequency heating apparatus including a heater control means for performing OFF control, a light emitting unit and a light receiving unit are provided via the turntable surface or a peripheral portion thereof, and the toast pan stagnation is performed based on an output state of the light receiving unit. A pan stagnation detecting means for detecting a state, wherein when the pan stagnation detecting means detects that the toast pan is stagnated, the heater ON control by the heater control means is prohibited. It is a feature.

(3) Structure of the invention according to claim 3 The high-frequency heating device according to the invention according to claim 3 is a bread placing section for placing a toasting bread in a heating chamber, and a pan on the bread placing section. And a heater for turning on and off the heater
In a toaster range type high-frequency heating apparatus including a heater control means for performing FF, a set position corresponding to each of a plurality of breads to be baked on the bread placing portion is specified, and the heaters are mutually switched for each of the set positions. And a divided heater which is provided independently and controlled ON and OFF independently of each other, and furthermore, the bread placement section is located at an intermediate position for each of the specified set positions of the bread placement section. Provide a light emitting unit and a light receiving unit that are vertically opposed through
The present invention is characterized in that the presence of a pan is detected for each set position from the output state of the light receiving unit, and only the corresponding divided heater is individually turned on.

[0013]

The inventions described in claims 1 to 3 of the present application are each configured as described above.
Each has the following effects.

(1) Operation of the invention according to claim 1 In the high-frequency heating apparatus according to the first aspect of the present invention, in the rotary baking type toaster range type high-frequency heating apparatus, the heating chamber is provided with the turntable interposed therebetween. By providing a lamp inside the cabinet and a light receiving unit for receiving light from the lamp inside the cabinet, the light from the lamp inside the cabinet to the light receiving unit is cut off when the bread passes, and the light receiving unit changes accordingly. The number of breads on the turntable is accurately determined from the output state of, and the amount of heat generation control of the heater by the heater control means can be appropriately varied according to the determination result of the number determination means. .

That is, in this configuration, since a normal interior lamp for illuminating the inside of the heating chamber is also used as the light emitting section, a dedicated light emitting section as in the related art becomes unnecessary, and the number of parts is reduced as compared with the conventional case. In addition, the structure is simplified and the number of assembling steps is reduced, so that the cost is reduced accordingly.

(2) Operation of the invention according to claim 2 In the high-frequency heating apparatus according to the second aspect of the present invention, in the high-frequency heating apparatus of the rotary baking type described above, the light-emitting portion is provided via the turntable surface or a peripheral portion thereof. And a light receiving unit are provided so as to oppose each other, so that light from the light emitting unit to the light receiving unit is cut off when the pan is stopped and positioned between them, and a pan stagnation detecting unit is provided based on the output state of the light receiving unit. Thus, for example, a stagnant state of the toasting pan on the turntable surface or its periphery is detected. When the toasting pan detects that the toasting pan has stagnated at a predetermined position on or around the turntable by the pan stagnation detecting means, the heater ON control by the heater control means is prohibited to cause burning unevenness. Prevent possible non-rotating baking.

(3) Operation of the invention according to claim 3 In the high-frequency heating apparatus according to the invention according to claim 3, in the high-frequency heating apparatus of the above-mentioned toast pan fixed type which does not rotate the turntable, A set position corresponding to each of the plurality of breads to be baked is specified in advance, and the heaters are provided independently of each other in the specified pan set position, and And a divided heater (independent heater) that is independently turned on and off. Thus, the individual pans can be individually and independently heated by the corresponding individual heaters.

Further, a light emitting section and a light receiving section which are vertically opposed to each other at the specified set position of the bread placing section with the bread placing section in between are provided, and an output of the light receiving section is provided. The presence of the pan is individually detected for each set position from the state, and only the corresponding divided heater is individually turned on.

Therefore, no electricity is supplied to unnecessary heaters on which the pan is not placed.

[0020]

Therefore, as is apparent from the above description,
According to the inventions described in claims 1 to 3 of the present application, each of the above-described conventional problems can be surely solved in response to the above-mentioned problems. In particular, in the first aspect of the present invention, since the interior lamp is used as the light emitting means, a dedicated light emitting unit as in the related art is not required, and the cost is reduced, which is optimal for a toaster range or the like. .

[0021]

(1) First Embodiment FIGS. 1 to 4 show the configuration of a high-frequency heating apparatus (microwave oven) according to a first embodiment of the present invention.

First, FIG. 1 shows the overall structure (housing structure) of the high-frequency heating device 1, and a heating chamber (storage for foods) 2 is provided inside the housing 1a. At the bottom of the heating chamber 2, a hollow net type turntable 3 for mounting a toast pan is rotatably installed. A door 16 having a finder 17 is attached to the front opening 19 of the heating chamber 2 so as to be openable and closable in the vertical direction. Further, a door switch 18 is provided on the main body side corresponding to the door 16. Also,
Above the side wall of the heating chamber 2, a lamp 5 inside
The light from the in-compartment lamp 51 is incident on a light receiving section 52 below the turntable 3 and is detected. The interior lamp 51 is driven by a lighting circuit 53.

On the other hand, the door 16 on the front side of the housing 1a
Various functions of the high-frequency heating device are operated and operated on the right side of
An operation panel unit 26 for controlling is provided. For example, as shown in detail in FIG. 2, the operation panel section 26 includes a display section (fluorescent display section) 34, a heating time setting key for a manual menu (5 minutes, 27, start key 28a, cancel key 28b, manual heating key
(Contains 5 keys for range strong / weak, raw thawing, toaster, pizza heating) 29, Automatic heating key (contains 6 keys for warming, warming milk, sake can, toast, frozen toast and cooking rice) 30 , Finish adjustment keys (finish,
It has two functions of adjusting the burning color, and is composed of two keys, a strong key and a weak key.) 37 and a time setting key 38 are appropriately arranged with good operability.

When, for example, the above-mentioned various operation keys on the lower side are turned ON, various selection setting states are displayed on the display section 34 as shown in the figure.

The operation panel section 26 is connected to a control unit 20 for controlling a microwave oven mainly composed of a microcomputer, for example, as shown in FIG. 2, via a data bus and a control bus. You can send and receive.

Further, as is apparent from FIG. 2, microwaves are radiated and absorbed by the object to be heated (cooked food) on the turntable 3 in the heating chamber 2 inside the housing 1a of the high-frequency heating device 1. Magnetron 1 heated by heating
3, upper and lower overall heaters 36a, 36b for heating the object to be heated in the heating chamber 2 by irradiating the object with infrared rays, and a heater circuit 35 for driving them are provided as shown in the figure. Further, a turntable motor drive circuit 24 is provided between the control unit 20 and the turntable motor 4, and a magnetron drive unit 22 is provided between the control unit 20 and the magnetron 13.
Are interposed. The turntable motor 4 is also provided with a weight sensor (not shown), and a detection value K detected by the weight sensor is used for determining the amount of food other than the bread for toast.

Next, the contents of the automatic toast baking control by the control unit 20 will be described in detail with reference to the flowchart of FIG.

[0028] That is, the first automatic toasting menu key of the operation panel section 26 is turned ON, thereby is started automatically toast ware control, the enamel net type turntable 3 of the above is rotated at a step S ₁ And the interior lamp 51 is turned on.

As a result, for example, two toasting pans P ₁ and P ₂ on the turntable 3 also rotate.

The light receiving section 52 is substantially synchronized with the rotation of the turntable 3 and the lighting of the interior lamp 51.
Is also turned ON. As a result, the light receiving unit 52 outputs a voltage signal corresponding to the amount of light from the in-compartment lamp 51 incident through the turntable 3,
The voltage signal is converted into a positive square wave as shown in FIG. 3 through a light receiving circuit 54 having a waveform shaping and phase inverting function, and then detected as a light receiving signal output (pan presence detection signal).
(Step S _2).

The light receiving signal pulse is transmitted to the control unit 2
The number of pulses for one rotation of the turntable which is input in 0 is counted (step S ₃ ), and the number of toast breads delivered to the storage is one or two according to the number. or it is determined (step S _4).

As a result, for example, as shown in FIG. 3A, when the number of toasting pans in which the number of received light pulses per turntable rotation is one is one, the heater circuit 3 is used.
5 by the upper and lower heaters 36a, on one sintered heated state drive voltage duty is small 36b at (Step S _5), and the number of pulses received per revolution turntable as shown in (b) of the other Figure 3 is 2 When the number of breads for a certain toast is two, the driving state of the upper and lower heaters 36a and 36b is controlled to be a two-pan heating state with a large voltage duty, so that an appropriate heating amount corresponding to the number of breads is obtained. Achieve a baked state. In this configuration, light passing through the pan
Since it is accurately detected by F to determine the number of breads,
The number determination is always accurate. Therefore, the control of the heating amount is also optimized, and a good baking state can be realized.

As described above, in the configuration of the present embodiment, since the ordinary interior lamp that illuminates the heating chamber is also used as the light emitting unit, the dedicated light emitting unit as in the related art is unnecessary, and the conventional light emitting unit is accordingly reduced. The number of parts is reduced, the structure is simplified, and the number of assembling steps is reduced, resulting in lower costs.

(2) Second Embodiment FIGS. 5 to 8 show a high-frequency heating apparatus according to a second embodiment of the present invention.

[0035] The above as in the first embodiment, when baked while rotating put two slices of toast bread P _1, P ₂ on the turntable 3, the pan P ₁ as shown in FIG. 6 or P ₂ Place the way the rotation of the turntable 3 is stopped by abutting bread P ₁ is for the bad and the refrigerator inner wall 1b of, there is a problem that burn uneven.

Therefore, in the high-frequency heating device of this embodiment,
For example, as shown in FIG. 5 and FIG. 6, a light emitting unit 55 and a light receiving unit 52 are provided above and below a point A where the pan can always pass when the turntable 3 rotates, regardless of how the bread is placed. The control unit 20 determines whether the turntable 3 is normally rotating from the light incident state (FIGS. 7, (a) and (b)) or whether the toast pan is caught on the inner wall 1b and stopped. The identification can be determined. The light emitting section 55 is driven by a light emitting section drive circuit 56.

Next, the flow chart of FIG. 8 shows the details of the above-described rotation state identification control by the control unit 20.

That is, first, when the automatic toast menu key of the operation panel section 26 is turned ON, the automatic toast baking control is started.

[0039] Then, the turn table 3 in step S ₁
There is rotated, followed by inversion through the light receiving circuit 54 in step S _2, and inputs received signals output from the light receiving portion 52 whose waveform is shaped (FIG. 7 (a) or (b)).

[0040] Then, in step S _3, to determine the waveform of the light receiving signal output, the heater 36 proceeds to step S ₄ when the waveform is a pulse train signal shown in FIG. 7 (a)
Turn on both a and 36b to bake the toast bread. On the other hand, when the waveform is a continuous signal shown in FIG. 7B, the toast pans P ₁ , P
₂ is in a state where the turntable 3 is stopped with the one side hitting the inner wall 1b, and if the heater is heated as it is, a uniform heating state cannot be realized, resulting in uneven baking.

Accordingly, in this case, the heaters 36a, 36
In Step S ₁ without the b to ON, first stopping the rotation of the turntable 3, followed by visual together in step S ₇ with issues an abnormality alarm is actuated predetermined sound Funingu means (step S ₆₎ The control is also terminated after performing an abnormal display.

Therefore, according to this configuration, the turntable 3
If the toasting bread is not properly placed, an alarm is issued and the user is notified. Therefore, the bread can always be baked at an appropriate position on the turntable 3, and uneven baking does not occur.

(3) Third Embodiment In the case of the second embodiment, a position where the pan always passes when the turntable 3 rotates is selected, and the light emitting unit 55 and the light receiving unit 52 are paired above and below it. However, the stagnation of the object placed on the turntable 3 as described above originally occurs at the four corners of each corner in the refrigerator as shown in FIG. There are many. Accordingly, it is preferable that the light-emitting unit and the light-receiving unit be located in each of the _first to _fourth corners C1 to C4 for detecting the stagnation state of the mounted object as described above. In this case, as is clear from the flowchart of FIG. 11, for example, the output status of each of the light receiving units L _{1 to} L ₄ is the same as in the second embodiment.
Based on (FIG. 10), it is determined whether or not the object to be heated is stagnant, and in accordance with the result, an abnormality is notified and the replacement of the object to be heated is ordered or, if normal, a heater, a magnetron, etc. Can be turned on to perform heating.

(4) Fourth Embodiment FIGS. 12 and 13 show the structure and operation of a main part of a high-frequency heating apparatus according to a fourth embodiment of the present invention.

In the case of baking toast bread in a toaster range, there is a type in which the toast pan is placed on an enameled-type turntable 3 and is efficiently baked while rotating, as in the above-described embodiments. Some types are simply baked. Even in the case of the latter type, if a configuration in which the entire upper and lower heaters 36a and 36b are turned ON and heated as in the case of the rotary type shown in FIGS. In a toaster range or the like, a portion where the bread for toast is not placed unnecessarily is also heated, resulting in waste of power consumption.

Therefore, in the case of such a two-pan toaster range, for example, as shown in FIG. 12, a place where two breads are to be placed (two places on the left and right) is designated in advance, and only the place is designated. By providing the first and second heaters H ₁ and H ₂ , an efficient baking system can be realized.

However, even when such a configuration is adopted, if only one bread is burned instead of two breads, the heater on the other side consumes useless electric power.

Therefore, in this embodiment, the light emitting unit and the light receiving unit which are located above and below the central portions A and B of the _first and _second heaters H ₁ and H ₂ are similar to those described above. To automatically detect the presence of bread at each position based on the presence or absence of the received light output, and turn on only the heater where the bread is actually placed to bake the toast bread without waste. It was done.

The contents of the operation control of the two heaters are shown in FIG.
Is shown in the flowchart of FIG.

That is, first, in step S ₁ , the first
The photoelectric unit No1 (point A) and the second photoelectric unit No2 (point B) are turned on.

Next, in step S _2, and inputs the received signal from the first light receiving portion of the second respective photoelectric unit No1 of, No2.

[0052] Then, first, the first photoelectric unit No1 (A point) it is determined whether the ON (H output) in step S _3, when it is YES (ON) proceeds to step S ₄ turns oN the first heater H ₁ of the No1 position a point.

On the other hand, if NO (OFF), step S
Moving to ₅ , it is determined whether or not the second photoelectric unit No2 (point B) is ON. Consequently, YES second ON the heater of H ₂ the No2 position proceeds to step S ₆ when the (ON)
To On the other hand, when the NO (OFF) ends the control without the second heater H ₂ to ON.

Therefore, according to the high-frequency heating device of this embodiment, only the heater at the position where the pan is actually placed is turned on.
When activated, baking is performed. Therefore, wasteful power consumption is eliminated, and if a proper pan is not placed, the corresponding heater is not energized, so that occurrence of uneven printing is prevented.

(5) Fifth Embodiment The concept similar to that of the fourth embodiment is described in, for example, FIG.
First to fourth pairs of split heater H ₁ to H ₄ No1 in the case of four sintered type with the (A point) ~No4 (B as shown in
By installing the first to fourth photoelectric units (light-emitting unit and light-receiving unit) at each position (dot), the same can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a housing structure of a toaster range type high frequency heating apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a control circuit configuration of a main part of the device.

FIG. 3 is a time chart of a light receiving signal output of the device.

FIG. 4 is a flowchart illustrating an operation of determining the number of toast breads by a control unit of the apparatus.

FIG. 5 is a block diagram showing a control circuit configuration of a toaster range type high frequency heating apparatus according to a second embodiment of the present invention.

FIG. 6 is a schematic plan view showing a configuration of a turntable unit in the refrigerator of the same device.

FIG. 7 is a time chart of a light receiving signal output of the device.

FIG. 8 is a flowchart showing a toast pan position detecting operation of the control unit of the apparatus.

FIG. 9 is a schematic plan view of a turntable part in a refrigerator of a toaster range type high frequency heating apparatus according to a third embodiment of the present invention.

FIG. 10 is a time chart of a light receiving signal output of the same device.

FIG. 11 is a flowchart showing the content of a heated object position detection control by a control unit of the apparatus.

FIG. 12 is a schematic plan view of a turntable part in a refrigerator of a toaster range type high frequency heating apparatus according to a fourth embodiment of the present invention.

FIG. 13 is a heater operation (ON / OF) of the apparatus.
It is a flowchart which shows the content of F) control.

FIG. 14 is a schematic plan view showing a configuration of a heater of a toaster range type high frequency heating apparatus according to a fifth embodiment of the present invention.

[Explanation of symbols]

1 is a high-frequency heating device, 2 is a heating chamber, 3 is a turntable, 13 is a magnetron, 20 is a control unit, 35 is a heater circuit, 36a is an upper heater, 36b is a lower heater,
51 is an interior lamp, 52 is a light receiving section, 54 is a light receiving circuit, 5
5 light-emitting unit, H ₁ to H ₄ are divided heater.

Claims (3)

(57) [Claims] A turntable for placing the pan rotating for toasting 1. A heating chamber provided with a heater, in Ete consisting toaster oven type high frequency heating apparatus Bei and heater control means for controlling the heating value of the heater, the turn A lamp in the refrigerator that illuminates the heating room with a table in the middle
A light receiving unit for receiving light from the interior lamp; and a number determining unit for determining the number of breads on the turntable based on an output state of the light receiving unit. A high-frequency heating apparatus characterized in that a heating control amount of a heater by a heater control means is made variable. A turntable for placing the pan rotating for toasting 2. A heating chamber provided with a heater, ON the heater, in Ete consisting toaster oven type high frequency heating apparatus Bei and heater control means for OFF control, the turn bread stagnation detecting means for detecting an output state or Lato paste stagnant state of the bread of the light receiving portion together with the table surface or through its periphery providing a light emitting portion and a light receiving portion is provided, the toast by the pan stagnant detecting means A high-frequency heating apparatus wherein a heater ON control by the heater control means is inhibited when it is detected that the pan is stagnant. 3. A pan mounting section for mounting a pan for toasting in a heating chamber, a heater for heating the pan on the pan mounting section, and heater control means for turning on and off the heater. In the toaster range type high-frequency heating device, a set position corresponding to each of a plurality of breads to be baked on the bread placing portion is specified, and the heaters are provided independently for each of the set positions , and
Mutually independently ON, constituted by OFF-controlled by dividing the heater, the light emitting unit for further opposing the pan mounting the identified said respective pan mounting unit for each set position was in part vertically through the intermediate And a light-receiving unit, wherein the presence of a pan is detected for each set position from the output state of the light-receiving unit, and only the corresponding divided heaters are individually controlled to be ON. Heating equipment.