JP3096582B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device such as an oven toaster.

[0002]

2. Description of the Related Art A general oven toaster has an upper and lower electric heater and a grate installed in a cooking chamber whose front is opened and closed, and a cooking object such as a bread placed on the grate is used for both electric heaters. It cooks by heating with heat. Recently, in this type, the electric power consumption of each electric heater tends to be increased to 1000 W (watt) or more in order to shorten the cooking time.

[0003] For this reason, if the energizing time to each electric heater is set with a long mistake, or if the cooking object is left in the cooking chamber and cooking is performed, the cooking chamber temperature tends to rise abnormally.

Therefore, as a safety measure to cope with such a situation, a temperature sensor made of a thermistor is conventionally attached to the cooking chamber. This temperature sensor is rod-shaped,
In order to detect the temperature of the cooking chamber, it is provided at the front of one of the side walls of the cooking chamber constituting wall that divides the cooking chamber, and furthermore, penetrates the upper end in the horizontal direction.

[0005] Therefore, in the conventional oven toaster, when the cooking chamber temperature becomes equal to or higher than the set temperature and the temperature is detected by the temperature sensor, the heater control circuit operates based on the detected information, and the power supply circuit to the electric heater is supplied. By turning off the switch inserted in the switch, safety in use can be ensured.

[0006]

However, conventionally, since the temperature sensor protrudes into the cooking chamber (usually about 15 mm),
When cleaning the cooking chamber, and when putting the object to be cooked in and out of the grill, the temperature sensor protruding into the cooking chamber may be in the way, and there is a problem that an external force is easily applied to the temperature sensor. .

[0007] Further, when the object to be cooked contains oil, such as fry or tempura, a portion of the oil splatters around during heating and cooking, and a part of the oil easily adheres to the temperature sensor, and the baking is difficult. Due to this, there is a problem that the sensitivity of the temperature sensor is likely to be out of order.

In addition, the upper end of the cooking chamber from which the temperature sensor is projected becomes the highest temperature region in the cooking chamber during use, and in this portion, when the cooking chamber temperature is normal and when the cooking chamber temperature is lower. The temperature difference from when the temperature rises abnormally is small. Further, temperature sensitive elements such as temperature sensors generally have variations in sensitivity. Therefore, in order to ensure that the power supply to the electric heater is cut off at the cooking chamber temperature set for safety, it is necessary to use a high-performance temperature-sensitive element with small sensitivity variation.

Further, as described above, the temperature-sensitive element projects at the upper end of the cooking chamber, which is the highest temperature area in the cooking chamber, and is directly exposed to a high-temperature atmosphere. Great stress. For this reason, there is a problem that a temperature-sensitive element has a high heat-resistant grade and therefore must be used at a high cost.

Further, in the oven toaster, a horizontal slit-like grill mesh sliding hole for guiding the longitudinal movement of the grill is provided at an intermediate position in the height direction of the side wall of the cooking chamber constituting wall. In use, the hot air flowing out of the cooking chamber through the grill sliding hole along the outer surface of the side wall rises along the outer surface of the side wall. Therefore, in the above-described arrangement of the temperature-sensitive element, there is a problem that the lead wire connected to the element is exposed to the discharged hot air, and the insulating coating is likely to be deteriorated.

A first object of the present invention is to provide a temperature-sensitive element which operates in response to the temperature of a cooking chamber in order to prevent an abnormal rise in the temperature of the cooking chamber. An object of the present invention is to provide a heating cooker which can prevent an obstacle from being put in and taken out of the device, prevent external force from being applied to the device, reduce thermal stress on the device, and reduce irregularities in sensitivity.

A second object of the present invention, in addition to the first object, is to provide a heating cooker which can use a heat-sensitive element having a large variation.

[0013]

To SUMMARY OF THE INVENTION To achieve the first object, the cooker of the present invention according to claim 1, cooking
The room has an electric heater and a grill moved in the front-rear direction.
Temperature that is stored and is sensitive to the temperature of the cooking chamber
The cooking chamber based on the sensitive operation of the element.
When the temperature of the heater reaches or exceeds the set temperature,
Assuming a cooker that is de-energized or restricted
And having a grid sliding hole for guiding the movement of the grid.
One of a pair of left and right metal side walls that define the cooking chamber
Metal that forms a hot air passage with the outer surface of the side wall of the
A metal heat transfer plate is attached so as to cover the grid sliding holes,
The heat-sensitive surface of the temperature-sensitive element is brought into contact with the plate,
The temperature sensitive element is attached . Claims
In carrying out the first invention, the invention of claim 2
As described above, the hot air is above the grid sliding holes.
Located at the outlet side of the passage, the temperature-sensitive element
It is good to attach to the board.

Further, in order to achieve the second object,
According to a third aspect of the present invention, there is provided a heating cooker, wherein a plurality of electric heaters arranged vertically apart from each other in a cooking chamber and a grille arranged between the electric heaters are respectively built in, and the cooking chamber is provided. Equipped with a temperature sensitive element that responds to the temperature of
When the temperature of the cooking chamber reaches or exceeds a set temperature based on the sensing operation of the element, the power supply to each of the electric heaters is cut off or limited. In addition to being disposed outdoors, the heat-sensitive surface of the temperature-sensitive element is located below the grill in the metal cooking chamber constituting wall that partitions the cooking chamber, and at the lowest position among the electric heaters. Is electrically connected to a wall portion at a position behind and behind the electric heater.

[0015]

[0016]

[0017]

In the heating cooker according to any one of claims 1 to 3 , the heat-sensitive surface of the temperature-sensitive element for preventing an abnormal excessive rise in the temperature of the cooking chamber includes:
Because it is thermally conductively connected to the cooking chamber constituent wall,
It operates in response to the temperature in the cooking chamber transmitted to this element. Thereby, when the temperature of the cooking chamber reaches or exceeds the set temperature, the power supply to the electric heater in the cooking chamber is cut off, or the power supply can be restricted such as reducing the number of W.

The temperature-sensitive element is arranged outside the cooking chamber and does not protrude into the cooking chamber. for that reason,
The temperature-sensitive element does not hinder the cleaning of the cooking chamber and the transfer of objects to and from the cooking chamber, and the walls constituting the cooking chamber serve as a mechanical protection wall to apply external force to the temperature-sensitive element. Is not added, and it is less likely to be exposed to oil splashing from the cooked object heated in the cooking chamber.

Moreover, the cooking chamber constituting wall also serves as a thermal protection wall for the temperature-sensitive element, and the temperature-sensitive element is not directly exposed to the high-temperature atmosphere in the cooking chamber. Thermal stress can be reduced.

Particularly, in the cooking device according to the first aspect,
Forms a hot air passage that guides hot air flowing out of the cooking chamber
Heat transfer plate jumps from the object to be heated in the cooking chamber.
Extremely low contamination with falling oil. And this
In the hot air passage where the heat transfer plate faces, the cooking room can be
The hot air that flows out passes through, so adjust the heat-sensitive surface by touching the heat transfer plate.
The temperature-sensitive element disposed outside the room has a temperature of the hot air.
Respond. Therefore, the shadow of oil splattering from the food
Temperature sensitive element under the condition that
Sensitive operation and maintain the reliability of the sensitivity for a long time
The cooking room temperature can be adjusted to the set temperature for long-term use.
When the above is reached, the power to the electric heater may be cut off or
Can be sure to limit.

In addition, the cooking device according to the second aspect is provided.
The hot air, depending on the arrangement of the temperature sensitive element with respect to the heat transfer plate.
The temperature of the hot air passing through the passage is more reliably controlled via the heat transfer plate.
Can be given to the sensitive element.

Further, in the cooking device according to claim 3,
The position below the grid where the temperature sensitive element is
The temperature is lower than the upper end of the cooking room because it is at the bottom of the room.
And behind the bottom electric heater,
Since it is located at a position where the thermal influence from the heater is small, the cooking room
The temperature of the temperature-sensitive element when the temperature is normal and the cooking chamber temperature
The difference between the temperature of the temperature-sensitive element and the temperature
Wear. Therefore, temperature sensitive elements with large sensitivity variations
Even if a child is used, make sure that the cooking room temperature is set for safety.
Indeed, it guarantees that the power to the electric heater is cut off or limited.
Can be

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. An oven toaster as a heating cooker according to a first embodiment of the present invention includes an inner box 1 made of a steel plate having a front opening and having an internal space used as a cooking chamber 1a. As shown in FIG. 4 and the like, the inner box 1 is formed by combining a bottom wall 2, which is a plurality of cooking chamber constituent walls, a pair of left and right side walls 3, 4, and reflectors 5 to 7. The inner surfaces of these cooking chamber constituent walls are surfaces that reflect heat rays.

The bottom wall 2 has a substantially rectangular planar shape, is disposed substantially horizontally, and has two longitudinal end portions 2a, 2a.
b and a rear edge 2c, a recess 2d having an open front end is provided, and a plurality of slit-shaped ventilation holes 8 are provided in the wide end 1a. The ventilation hole 8 is located outside the cooking chamber 1a. One side wall 4 is erected at one end 2 a provided with the vent holes 8, and the other side wall 3 is erected at the other end 2 b of the bottom wall 2. These opposite side walls 3 and 4 are connected to the bottom wall 2 by being fastened together with screws for fixing the legs 9 to the lower surface of the bottom wall 2.

The reflecting plate 5 is provided on the lower side of the rear part of the side walls 3, 4 and, as shown in FIGS. 2 and 3, a vertical portion forming the back surface of the cooking chamber 1a, and a diagonally lower front from the lower end. , A second inclined portion bent at an angle substantially perpendicular to the lower end of the portion, and a third inclined portion bent diagonally downward and forward from the lower end of the portion. And a fourth inclined portion having a short length bent obliquely downward and rearward from the lower end of this portion. The vertical portion of the reflection plate 5 is integrally connected to the rear ends of the side walls 3 and 4 and is bent from the rear end. Both longitudinal ends of the second to fourth inclined portions are formed on the side walls 3 and 4 respectively. It is in contact with the inner surface.

The reflector 6 is connected between the upper portions of the side walls 3 and 4 by screws 10 (see FIG. 4). The reflecting plate 6 has a front edge 6a bent upward.
And a rear edge 6 bent downward.
b. As shown in FIG. 2, the trailing edge 6 b is superimposed on the inner surface of the upper end of the vertical portion of the reflector 5.

The reflection plate 7 is disposed between the lower front portions of the side walls 3 and 4 at a large distance below the reflection plate 6. The reflector 7 has a horizontal portion, an inclined portion that is bent obliquely downward and rearward from the rear end of the portion and faces the reflector 5, and a front wall portion that is bent substantially vertically from the front end of the horizontal portion. It has a bottom wall bent from the lower end of this portion and screwed to both ends 2a, 2b of the bottom plate.

The inner box 1 having the above-described structure is made of an outer case 11 made of a steel plate.
Is obscured by. As shown in FIGS. 2 and 3, the outer case 11 is formed by a case body 12 that covers the upper surface and both side surfaces of the inner box 1, and a case rear plate 13 that covers the rear surface of the inner box 1. The case main body 12 has the lower ends of the left and right side plate portions overlapped on the lower surfaces of both ends 2a and 2b of the bottom wall 2 and are connected by screws (not shown). A case rear plate 13 having vent holes (not shown) at upper and lower portions is fitted into a rear opening formed by the case main body 12 and the bottom wall 2, and is fitted to a screw receiving portion provided at the rear end of the side walls 3, 4. Screwed.

A gap is formed between the inner case 1 and the outer case 11, and a heating control device (not shown) is provided between the side wall 4 and the right side plate of the case body 12 opposed thereto. An equipment storage space S (see FIG. 3) having a large built-in volume is secured. The heating control device is formed with a mechanical base, a control board on which semiconductors such as integrated circuits and other circuit components are mounted, and the like.

Since the one end 2a of the bottom wall 2 faces the equipment storage space S, the equipment storage space S is formed through the ventilation hole 8.
Is communicated below the bottom wall 2. As shown in FIGS. 1 and 3, a plurality of slit-shaped ventilation holes 14 are provided in the top plate of the case main body 12 so as to face the device storage space S. Therefore, at the time of use, cold outside air flows into the device storage space S from the ventilation hole 8, flows through the space S, and is discharged from the ventilation hole 14, so that an excessive rise in the temperature of the device storage space S is prevented. It has become so.

Front frame 1 made of steel plate provided on the front surface of inner box 1
5 is connected to the front edge 6a of the reflector 6 and the front wall portion of the reflector 7 and the like. The front frame 15 covers and cuts the cut surfaces located at the front ends of the inner box 1 and the case main body 12, respectively, and a portion facing the device storage space S is used as an operation panel portion 15a. The panel unit 15a includes a timer mechanism (not shown) incorporated in the device storage space S, various buttons and knobs for operating a heating control device such as a control device, a display lamp, and the like. It is provided to be operable from outside.

A door 17 in which a transparent glass 16 is fitted is attached to the front frame 15. The door 17 is pivotally opened frontward with its lower end as a fulcrum. The pivoting of the door 17 opens and closes the front opening of the cooking chamber 1a, so that an object to be cooked such as bread can be put in and out of the cooking chamber 1a. In FIG. 1, 17a is a door handle, 18 is a power cord, and 19 is a recess 2 of the bottom wall 2.
A litter tray 20 that is put in and out of the d from the front is a handle for carrying the entire toaster.

As shown in FIGS. 1 to 4, a plurality of, for example, a pair of vertically adjacent electric heaters 21,
22 and at least one grill 23 disposed between the electric heaters 21 and 22 are built in. The electric heaters 21 and 22 are quartz tube heaters having insulators at both ends, and large heaters having a total power consumption of about 1200 W (watt) are used in order to shorten the cooking time. These high-power electric heaters 21 and 22 are installed horizontally across the pair of left and right side walls 3 and 4. In FIG. 4, reference numeral 24 denotes a conductive plate for electrically connecting one ends of the electric heaters 21 and 22.

The grill 23 is made of a metal rod and has a sliding shaft 23a at its rear end. This grill 23
Is a slit-like grill grid sliding hole 25 extending in the front-rear direction at the middle portion in the height direction between the pair of left and right side walls 3, 4 and provided horizontally.
While inserting both ends of the sliding shaft 23a,
Grill support pins 2 projecting from the inner surfaces of the front ends of the side walls 3 and 4 respectively.
6 is supported.

The grill 23 can be moved in the front-rear direction while maintaining a horizontal posture, using the grill sliding holes 25 and the grill support pins 26 as guides. When the part is protruded from the front opening of the cooking chamber 1a and is moved rearward, the whole is stored in the cooking chamber 1a.

In FIGS. 2 and 3, reference numeral 27 denotes an interlocking arm provided on the outside of the cooking chamber 1a, the front end of which is pivotally connected to the door 17, and the rear end of which is pivotally connected to the end of the sliding shaft 23a. Have been. Therefore, the grill 23 is moved back and forth in conjunction with opening and closing of the door 17. Between the interlocking arm 27 and the rear ends of the side walls 3 and 4, a coil spring 28 that constantly urges the interlocking arm 27 rearward is stretched.

Outside the cooking chamber 1a, in other words, between the inner box 1 and the outer case 11, a temperature switch 31 as a temperature-sensitive element is connected to the heat-sensitive surface, for example, to the side wall 4 by heat conduction. It is provided by a mounting structure described later.
In addition, a temperature switch 31 is provided at a position below the grill 23 and the grill sliding hole 25 and at a position away from the rear electric heater 22. In particular, in the first embodiment, the temperature switch 31 which is attached in close contact with the outer surface of the side wall 4 is different from the temperature switch 31 as shown in FIG.
Is mounted so as to straddle the end face of the reflection plate 5 in contact with the inner surface of the reflector. Since the temperature switch 31 is provided between the side wall 4 and the side plate portion of the outer case 11 facing the side wall 4, that is, in the device storage space S, the distance to the heating control device can be shortened, and therefore, it is not shown. This is advantageous in that the length of the lead wire is shortened to reduce the cost.

The temperature switch 31 is a normally closed switch that is turned off at a temperature equal to or higher than a set temperature, and is provided by being inserted in series into a circuit for applying power to the upper and lower electric heaters 21 and 22 connected in series. By the OFF operation, the upper and lower electric heaters 21 and 22 are turned off to be used as a safety device for preventing the cooking chamber 1a from being overheated.

The structure of the temperature switch 31 is shown in FIGS. Specifically, reference numeral 32 denotes a base made of a heat-resistant synthetic resin having a bottomed cylindrical shape, and its opening is closed by a bimetal disk 33. The disk 33 is covered and covered by a cup 34 made of a metal material having good thermal conductivity such as aluminum and caulked at the open end of the base 32. The cup 34 forms the heat sensitive surface of the temperature switch 31. In FIG. 5, reference numeral 35 denotes an insulating ring, which is sandwiched between the peripheral portion of the bimetal disk 33 and the rear surface of the peripheral portion of the cup 34.

The bimetal disk 33 having the same shape as a part of the spherical surface has a solid line in FIG. 5 until the temperature exceeds a certain set temperature (this temperature is higher than the maximum temperature of the cooking chamber 1a in a normal use state). As shown in (2), a curved state is maintained so as to be convex on the back side of the cup 34, and the cup 34 elastically adheres to the back side of the cup 34. Further, when the temperature exceeds the set temperature, the bimetal disk 33 is rapidly inverted and held so as to project toward the bottom wall side of the base 32 as shown by a two-dot chain line in FIG. The inverted state is maintained even if the temperature falls below the set temperature unless an external force is applied to the back surface of the cup 34.

First and second conductive columns 35 and 36 are attached to the bottom wall of the base 32 through the base wall.
L-shaped terminal fittings 37 and 38 are individually caulked at one end of the columns 35 and 36 protruding outside the bottom wall. Lead wires (not shown) are connected to the terminal fittings 37 and 38.

A fixed contact 39 is attached to the first support 35 in the base 32. The contact 39 is electrically connected to the terminal fitting 37 via the first support 35. An arm 40 that is elastically deformable in the base 32 is attached to the second support 36 via a spring clip 41, and a movable contact 42 is attached to the tip of the arm 40. The contact 42 is electrically connected to the terminal fitting 38 via the arm 40 and the second support 36.
The movable contact 42 is normally maintained in a state of being pressed against the fixed contact 39 by the elastic force of the arm 40, and the two contacts 39 and 42 are normally closed contacts.

The arm 40 is provided with a projecting contact portion 43. This convex portion 43 is
When the bimetal disk 33 is held as shown by a solid line in FIG. 5, the arm 40 is connected to the fixed contact 3.
When the bimetal disc 33 is positioned close to or in contact with the center of the bimetal disc 33 so as not to apply an external force in the direction away from the bimetal 9, the bimetal disc 33 is held as shown by a two-dot chain line in FIG. Is pressed by the center of the disk 33 to elastically deform the arm 40 to separate the movable contact 42 from the fixed contact 39, thereby keeping the temperature switch 31 in the off state.

At the center of the bottom wall of the base 32, a shaft-shaped reset button 44 made of a heat-resistant synthetic resin is mounted so as to penetrate therethrough. The button 44 is movable along the axial direction, and is provided in the base 32 to prevent the collar 4 from coming off.
4a and a reset protrusion 44b protruding from the center of the flange portion 44a. The tip of the reset projection 44b is close to the arm 40 from the side opposite to the bimetal disk 33.

When the bimetal disk 33 is in the state shown by the two-dot chain line in FIG.
At the same time as pushing the arm 40 with 4b, the bimetal disc 33 is pushed in the direction of the back of the cup 34 via the contact convex part 43, and this disc 33 is rapidly reversed to the state shown by the solid line in FIG. It can be returned to. The pressing operation of the reset button 44 is performed with the outer case 11 removed.

In FIG. 5 and FIG. 6, reference numeral 45 denotes an aluminum mounting body which is attached to a ring-shaped switch holder 45 a which is fitted on the outer periphery of the base 32 and is prevented from being removed by the cup 34. , A pair of fixed flanges 45
b is formed to protrude integrally.

The temperature switch 31 having the above-described configuration is arranged such that the cooking chamber 1 is positioned at the above-described mounting position on the outer surface of the side wall 4.
The flat surface of the cup 34 as a heat-sensitive surface is fixed to the outer surface of the side wall 4 by tightening a screw (not shown) penetrating the fixing flange 45a through the side wall 4 from the inside of the inner side a and a nut (not shown) screwed to the screw. It is attached in close contact with. Therefore, the temperature of the cooking chamber 1a is directly conducted to the bimetal disk 33 via the side wall 4 and the cup.

In the configuration in which the temperature switch 31 is directly mounted on the outer surface of the side wall 4 as described above, the number of components for thermally connecting the temperature switch 31 to the side wall 4 is minimized, the configuration is simple, and the inside of the cooking chamber 1a is reduced. The temperature switch 31 responds directly to the temperature of the cooking chamber 1a, so that the operational reliability of the temperature switch 31 for preventing the temperature of the cooking chamber 1a from rising excessively can be increased.

In the oven toaster having the above configuration,
Since the bimetal disk 33 of the temperature switch 31 mounted in close contact with the outer surface of the side wall 4 normally maintains the state shown by the solid line in FIG. 5, the movable contact 42 of the temperature switch 31 contacts the fixed contact 39. Thus, power can be supplied to both the upper and lower electric heaters 21 and 22 with high output.

For this reason, the upper and lower electric heaters 21 and 22 are energized to generate heat, so that the object to be cooked such as a bread directly placed on the grill 23 or the grill 23 via a tray (not shown). The loaded fries and other objects to be cooked can be cooked by heating. In this case, the cooking room 1a
The temperature of the side wall 4 and the cup 34 of the temperature switch 31
Is conducted to the bimetal disk 33 of the temperature switch 31 through the heat switch.

At the time of this cooking, the energization time to the electric heaters 21 and 22 is set with a long mistake, or the cooking chamber 1a is set.
The temperature of the cooking chamber 1a does not rise abnormally, except for abnormal use such as cooking without forgetting to put the food in the cooking chamber 1a.
Therefore, since the temperature of the bimetal disk 33 does not reach the operating temperature at which the bimetal disk 33 rapidly reverses, the temperature switch 31 is kept on and the cooking operation is continued.

By the way, due to the abnormal use, the cooking room 1
When the temperature a reaches or exceeds the set temperature, the temperature switch 31 is turned off as the bimetal disk 33 whose abnormal temperature spreads due to heat conduction rapidly reverses from the state shown by the solid line in FIG. 5 to the state shown by the two-dot chain line. Thereafter, the off state is maintained until a return operation is performed. Therefore, power supply to the upper and lower electric heaters 21 and 22 is cut off. Thereby,
Since an excessive rise in the cooking room temperature 1a is prevented, occurrence of an abnormal situation can be avoided.

The temperature switch 31 which operates in response to the temperature of the cooking chamber 1a as described above and prevents the temperature of the cooking chamber 1a from rising excessively is arranged outside the cooking chamber 1a as described above. , Does not protrude into the cooking chamber 1a. Therefore, when cleaning the cooking chamber 1a and when putting in and taking out the food on the grill 23, the temperature switch 31 does not hinder the operation, and these operations can be facilitated.
The side wall 4 serves as a mechanical protection wall, and an external force is not directly applied to the temperature switch 31, so that the life of the switch 31 is not adversely affected.

Further, the side wall 4 also serves as a thermal protection wall for the temperature switch 31, so that the temperature switch 31 is not directly exposed to the high-temperature atmosphere in the upper part of the cooking chamber 1a, and the thermal stress on the temperature switch 31 can be reduced. . Therefore, the synthetic resin forming the base 32 of the switch 31 can be made of a material having a low heat-resistant grade and therefore a low cost.

In addition, when the object to be cooked contains oil, such as fry and tempura, even if a part of the oil may be scattered to the surroundings during the heating, the side wall 4 is mechanically attached as described above. Because of the protective wall, a part of the scattered oil does not adhere to the temperature switch 32 and is not burned. Therefore, the temperature switch 3 associated with baking
Since the surface of No. 2 does not become dark and easily absorbs heat, the sensitivity of the temperature switch 32 is less likely to be degraded over a long period of use, and the temperature switch 32 maintains normal sensitivity for a long period of time. Can be.

Further, the temperature switch 31 is simply connected to the side wall 4 at a position below the grill 23 even between the cooking chamber 1a and the outer case 11 in a thermally conductive manner. By the way, since this location is the lower part of the cooking chamber 1a, the temperature is lower than the upper end of the cooking chamber 1a. In addition, the temperature switch 31 is provided at a position away from the lower electric heater 22 and at a position where the thermal influence from the heater 23 is small.

According to such an arrangement of the temperature switch 31, the temperature difference between the temperature of the temperature switch 31 when the cooking chamber temperature is normal and the temperature of the temperature switch 31 when the cooking chamber temperature abnormally rises. Can be increased. Therefore, even if the temperature switch 31 having a large variation in sensitivity is used, the upper and lower electric heaters 2 are surely kept at the cooking chamber temperature set for safety.
Since it is possible to obtain a guarantee that the power supply to the first and the second power supply 22 is cut off, and as described above, the variation in the sensitivity of the temperature switch 31 may be large, an inexpensive temperature switch 31 can be used.

Further, since the side wall 4 of the cooking chamber 1a has the grill sliding hole 25, the hot air flowing out of the hole 25 rises along the outer surface of the side wall 4. However, since the temperature switch 31 is disposed below the grid sliding hole 25,
Of the lead wires (not shown) connected to the temperature switch 31, one lead wire connecting the switch 31 and the heating control device is not exposed to the hot air. Therefore, the risk of deterioration of the insulation coating of the lead wire can be reduced, and a low heat-resistant grade can be used.

In the first embodiment, the temperature switch 31 is mounted so as to straddle the end face of the reflection plate 6 in contact with the inner surface of the side wall 4 as shown in FIG.
The side wall 4 that conducts heat to the cup 34 of the temperature switch 31
The high temperature in the cooking chamber 1a, the cooking chamber 1a and the outer case 11
Affected by low temperatures and between. Therefore, during normal use, the temperature of the temperature switch 31 can be kept low, and the temperature of the temperature switch 31 when the cooking chamber temperature is normal and the temperature of the temperature switch 31 when the cooking chamber temperature abnormally rises abnormally. The temperature difference can be made larger. Therefore, as described above, it is possible to reliably ensure that the power supply to the upper and lower electric heaters 21 and 22 is cut off at the cooking chamber temperature set for safety.

FIGS. 7 to 11 show a second embodiment of the present invention. In the second embodiment, as described in detail below, a heat transfer plate is connected to one of the pair of side walls 3 and 4 of the cooking chamber constituting wall, for example, the outer surface of the side wall 4, and the heat sensitive surface is closely attached to this plate. A point that a temperature switch 31 is attached and a temperature switch or the like is thermally conductively connected to the side wall 4 via the heat transfer plate is different from the first embodiment, and other configurations are illustrated in FIGS. Since the configuration is the same as that of the oven toaster of the first embodiment shown in FIGS. 1 to 6 including the parts not shown, the configurations not shown are substituted with FIGS.
The same reference numerals as those in the first embodiment denote the same constituent parts shown in the drawings, and a description of those constituent parts and a description of operation and effects based thereon will be omitted. It forms a part of the configuration of the toaster.

7 to 9, reference numeral 51 denotes a heat transfer plate made of a steel plate. The entire upper edge forms a mounting edge 51a bent into an L-shaped cross section, and the front edge of the lower edge is removed. A half or more portion also forms a mounting edge 51b bent into an L-shaped cross section. The heat transfer plate 51 has substantially the same length as the width of the side wall 4 that separates the cooking chamber 1a and the equipment storage space S, and is provided on the outer surface of the side wall 4, that is, on the surface facing the equipment storage space S. Is covered and screwed to cover the sliding hole 25 formed in the grill. The screws 52 are attached to the mounting edges 51a, 51b.
And is screwed to the side wall 4 through the rear end portion. Heat transfer plate 5
The front end of 1 is engaged with the back surface of a front flange 4a bent at a right angle from the front end of the side wall 4 toward the device storage space S. In FIG. 8, reference numeral 51c denotes an engagement piece before bending supported by the front flange 4a.

Thus, a hot air passage 53 (see FIG. 11) extending in the front-rear direction is formed between the inner surface of the heat transfer plate 51 mounted on the outer surface of the side wall 4 and the outer surface of the side wall 4 opposed thereto. ing. The passage 53 communicates with the cooking chamber 1a via the grill sliding hole 25. The rear end of the hot air passage 53 close to the inner surface of the case rear plate 13 is opened as an outlet 53a (see FIG. 9) from which hot air is discharged. In the hot air passage 53, the interlocking arm 27 and the coil spring 28 are located.

At the lower corners of the case rear plate 13, inflow ventilation holes 54a, 54b are provided, respectively, and at the upper upper corners of the case rear plate 13, outflow ventilation holes 55a are provided, respectively. , 55b are provided. The ventilation hole 55a is disposed near the hot air outlet 53a.

A heat-sensitive surface, that is, a cup 34 is brought into close contact with the heat transfer plate 51, and the temperature switch 31 is attached to the mounting body 45 and fixing members 56 such as screws and rivets (see FIG. 9).
Mounted through. In particular, in the second embodiment, as shown in FIG. 7, it is attached to the outer surface of the heat transfer plate 51 at a position above the grid sliding holes 25 and at a position closer to the hot air outlet 53a. .

The temperature switch 31 operates in response to the temperature of the hot air flowing out of the grid sliding hole 25 and passing through the hot air passage 52 as the cooking chamber temperature. In addition, in order to make the responsive operation more reliable, in the present embodiment, a through hole 57 (see FIG. 11) is provided in the cup contact area of the heat transfer plate 51,
The hot air passing through the hot air passage 53 directly reaches the cup 34 through the through hole 57. Note that this through hole 57 may be omitted.

As shown in FIGS. 7 to 9, a partition plate 58 made of a steel plate having an L-shaped plane is fixed to the front outer surface of the heat transfer plate 51 by screws 59 in the equipment storage space S. It is provided. The partition plate 58, the operation panel portion 15a, and the front side portion of one side plate portion facing the device storage space S of the case main body 12 form a storage portion Sa having a rectangular tubular shape extending vertically. The heating control device (not shown) is housed inside. The partition plate 58 is in local contact with the heat transfer plate 51 so as not to receive heat conduction from the heat transfer plate 51 as much as possible.

The configuration other than the above is the same as that of the first embodiment.

In the oven toaster of the second embodiment having the above-described configuration, a part of the hot air in the cooking chamber 1a flows out through the grill mesh sliding hole 25 in the side wall 4 during heating and cooking. The discharged hot air is passed through a hot air passage 53 facing the heat transfer plate 51 attached to the outer surface of the side wall 4 so as to cover the sliding hole 25.
And flows out of the outer case 11 from the outlet 53a through the ventilation holes 14, 55a of the outer case 11.

The temperature switch 31 is attached to the heat transfer plate 51 heated by the hot air flowing out as described above, with the cup 34 as a heat-sensitive surface being closely attached to the outer surface thereof. Operates in response to the temperature of the hot air passing through the hot air passage 53 outside the cooking chamber 1a.

Although the heat transfer plate 51 is connected to the side wall 4, these are thin (about 0.3 to 0.5 mm) and stick, so that the mounting edge 51 a of the heat transfer plate 51 with respect to the side plate 4,
The portions 51 b are slightly separated from each other at portions other than the connection portion, so that heat conduction from the side wall 4 to the heat transfer plate 51 is not large, and the heat transfer plate 51 is heated mainly by hot air passing through the hot air passage 53.

Accordingly, also in the configuration of the second embodiment, the temperature switch 31 responsive to the cooking chamber temperature to prevent the cooking chamber temperature from abnormally rising as described above projects into the cooking chamber 1a. As in the first embodiment, when the temperature switch 31 is used to clean the cooking chamber 1a and to put food into and out of the cooking chamber 1a, as in the first embodiment,
It doesn't get in the way. In addition, since the side wall 4 can be used as a mechanical and thermal protective wall, no external force is applied to the temperature switch 31 during the cleaning or the like, and the temperature / temperature switch 31 is used for the high temperature atmosphere in the cooking chamber 1a. Direct exposure is eliminated, and thermal stress on the switch 31 can be reduced.

When the object to be heated in the cooking chamber 1a contains oil such as fried food, the oil splatters with the heating and is attached to the inner surface of the cooking chamber 1a. However, since the heat transfer plate 51 to which the temperature switch 31 is attached is connected to the outer surface of the side wall 4,
Serves as a shielding wall against the scattered oil, and the oil hardly adheres to the heat transfer plate 51.

The temperature switch 31 attached to the heat transfer plate 51 in this manner is less likely to be exposed to oil splashing from the object to be cooked.
Is attached to the outer surface of the heat transfer plate 51, so that oil splashing from the object to be cooked is not attached to the temperature switch 31 and is not burned.

Therefore, the side wall 4 can be used for a long time.
Even if the oil adhering to the bottom sticks to the inner surface and becomes dark, the oil is prevented from adhering to the temperature switch 31 and seizure is prevented. In addition, heat conduction from the side wall 4 to the heat transfer plate 51 is not good as described above.
When the inner surface of the side wall 4 is darkened, the heat ray reflectance is lowered, and at the same time, the heat is easily absorbed, and the temperature of the side wall 4 is easily increased. Less. Therefore, even if the temperature switch 31 is used for a long time, the sensitivity of the temperature switch 31 is extremely small.

Under the condition that the influence of the oil splashing from the object to be cooked is extremely small, the temperature switch 3
1 is operated via the heat transfer plate 51 to the temperature of the hot air flowing out of the cooking chamber 1a, and the reliability of the sensitivity can be maintained for a long period of time. Thus, it is possible to ensure that the power supply to the electric heaters 21 and 22 is cut off.

Further, since the temperature switch 31 is disposed above the grid sliding hole 25 on the side wall 4 and on the outlet 53a side of the hot air passage 53 with respect to the heat transfer plate 51, the hot air passage 53 The temperature of the passing hot air can be more reliably given to the temperature switch 31 via the heat transfer plate 51. Therefore, the temperature of the hot air flowing out of the cooking chamber 1a can be accurately detected, and the power supply to the electric heaters 21 and 22 can be reliably cut off at the cooking chamber temperature set for safety.

In this embodiment, the hot air passage 53
Are formed in the front-rear direction, and the temperature switch 31 is mounted on the outer surface of the heat transfer plate 51.
The heat transfer plate 51 can be used as a shield against the hot air flowing out of the cooking chamber 1a with respect to a lead wire (not shown) connected to the two terminal fittings 37 and 38. Therefore, it is possible to prevent the two lead wires from being exposed to the outflowing hot air.

Further, as described above, the hot air flowing out of the cooking chamber 1a through the grill sliding hole 25 of the side wall 4 is passed through the hot air passage 53 partitioned from the equipment storage space S by the heat transfer plate 51. Since the air can be quickly discharged to the outside of the case 11, the hot air flowing out of the grid sliding holes 25 is less likely to be trapped in the device storage space S. Moreover, since the partition plate 58 is provided in the equipment storage space S, it can be used as a heat shield wall for the high-temperature cooking room 1a having the high-output upper and lower electric heaters 21 and 22.

For this reason, the storage portion inside the partition plate 58
The temperature rise of the heating control device (not shown) accommodated in Sa can be suppressed to be low, and therefore, it is used to control the heat generation of these high-power electric heaters 21 and 22 despite using them. A heater control circuit including a semiconductor can be used under appropriate temperature conditions.

As described above, the grid sliding hole 2 in the side wall 4
5 as a heat transfer member for transmitting the temperature of the hot air flowing out of the cooking chamber 1a to the temperature switch 31;
1 as a bracket for attaching the hot air passage 53
Since the heat transfer plate 51 used as a member forming the heat sink and as a heat shield wall for the equipment storage space S covers the grill mesh sliding hole 25 of the side wall 4, in addition to the above functions, the cooking chamber In the event that an object to be cooked in 1a burns due to an erroneous setting of the heating time or the like, it can be used as a fire wall and a baffle for air flowing into the cooking chamber 1a.

That is, when the object to be cooked in the cooking chamber 1a is burned and the flame blows out of the cooking chamber 1a through the grill mesh sliding hole 25 of the side wall 4, the spread to the point is transferred to the heat transfer. This can be prevented by the plate 51. Further, when the air in the appliance storage space S tries to flow into the cooking chamber 1a through the grill mesh sliding hole 25 of the side wall 4 due to the combustion, the air is hindered by the heat transfer plate 51 and directly burns. It is not possible to reach the mesh sliding hole 25, and it is necessary to flow in bypassing the heat transfer plate 51. As a result, shortage of combustion air suppresses combustion,
Quick fire extinguishing can be facilitated.

FIG. 12 shows a third embodiment of the present invention. This third embodiment differs from the second embodiment only in the configuration of the heat transfer plate as described in detail below, and other configurations are shown in FIGS. 7 to 11 including portions not shown in FIG. Since the configuration is the same as that of the oven toaster of the second embodiment, the components not shown are replaced with those of FIGS. 7 to 11 and FIGS. The same reference numerals are given and the description of the configuration and the description of the operation and effect based on them are omitted, but these same parts also constitute a part of the configuration of the oven toaster of the present embodiment.

The heat transfer plate 51 of the third embodiment is composed of a heat transfer plate front portion 51A and a heat transfer plate rear portion 51B extending integrally in the front-rear direction. Heat transfer plate rear part 51B
The bottom wall of the heat transfer plate 51A1 extends in the same horizontal plane as the bottom wall 51A1 of the heat transfer plate front portion 51A and extends rearward.
The upper wall 51B1 is formed as a wall inclined obliquely upward and rearward from the rear end of the upper wall 51A2 of the heat transfer plate front part 51A. Therefore, the rear portion 51B of the heat transfer plate becomes wider toward the outlet at the rear end. Thus, the coil spring 28 for urging the interlocking arm can be disposed at the rear part 51B of the heat transfer plate, and the front part 51A of the heat transfer plate is formed to be narrow. A temperature switch 31 is mounted on the outer surface of the front portion 51A of the heat transfer plate at a height corresponding to the grid sliding hole 25 in the side wall 4. The configuration other than the above is the same as that of the second embodiment.

Therefore, even in the configuration of the third embodiment, the same operation and effect as those of the second embodiment can be obtained, and the intended object of the present invention can be achieved.

The present invention is not limited to the above embodiments. For example, a temperature fuse or a temperature sensor may be used as the temperature sensitive element instead of the temperature switch.
However, the use of the temperature switch of the manual reset type according to the present embodiment has a simple structure, high reliability of operation, and a repetitive initial state (when the switch is turned on) because the temperature detection means and the switch means are both used. This is advantageous in that it can be used after returning to the state.

In each of the above-described embodiments, the power supply to the electric heater is cut off when the temperature of the cooking chamber reaches the set temperature or higher, based on the responsive operation of the temperature responsive element. The number of W may be reduced by limiting the current flowing in the cooking chamber to a small value, thereby also preventing an abnormal excessive rise in the cooking chamber temperature.

In the first embodiment, a temperature switch as a temperature-sensitive element is provided on the outer wall of the cooking chamber constituting wall, for example, the side wall 4 by closely contacting the heat-sensitive surface with the heat-sensitive element. Instead of connecting a bracket, and attaching a temperature switch or the like with the heat-sensitive surface in close contact with the bracket, the temperature switch or the like can be thermally conductively connected to the outer surface of the cooking chamber constituting wall via the bracket. Good.

The present invention also relates to a heating cooker such as an oven toaster having a configuration in which a plurality of grills movable in the front-rear direction are provided in a cooking chamber and electric heaters are arranged above and below these grills. Applicable. Further, the present invention can be applied to a cooking device in which a grill is not provided in a cooking chamber.

[0089]

As described in detail above, claims 1 to 5 of the present invention.
According to the heating cooker according to the third aspect , when the cooking chamber is cleaned, the temperature sensitive element that operates in response to the cooking chamber temperature in order to prevent the cooking chamber temperature from excessively rising does not protrude into the cooking chamber. , And when putting food in and out of the cooking room,
The temperature sensitive element does not get in the way. Moreover, since the cooking chamber constituting wall can be used as a mechanical and thermal protection wall, no external force is applied to the temperature sensitive element during the cleaning or the like, and the temperature sensitive element is directly exposed to the high temperature atmosphere in the cooking chamber. Temperature, the thermal stress on the temperature-sensitive element can be reduced, and the temperature-sensitive element is less likely to be exposed to oil splashing from the object to be heated in the cooking chamber.

Further , according to the cooking device of the first aspect,
Is very likely to be affected by the oil splashing from the food.
Operate the temperature-sensitive element under less conditions.
The device's sensitivity reliability can be maintained for a long time,
Prevents abnormal rise in cooking chamber temperature during long-term use
Reliability can be increased.

Further, according to the heating cooker according to claim 2,
For example, the temperature of the hot air flowing out of the grid sliding holes and passing through the hot air passage
More reliably to the temperature sensitive element through the heat transfer plate
Can cause abnormalities in the cooking chamber temperature during long-term use.
The reliability of preventing the rise can be increased.

[0092] According to the heating cooker according to the third aspect,
When cooking room temperature is normal and when cooking room temperature rises abnormally
Because the temperature difference of the temperature sensitive element between
Safe even with temperature sensitive elements with large sensitivity variations
Make sure that the cooking chamber temperature set above
It is possible to obtain a guarantee that the power supply is cut off or limited.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an oven toaster according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of the oven toaster according to the first embodiment.

FIG. 3 is a side view showing a configuration of the oven toaster according to the first embodiment with a partial cross section viewed from an arrow Z direction in FIG. 1;

FIG. 4 is an exploded perspective view showing a configuration around a cooking chamber of the oven toaster according to the first embodiment.

FIG. 5 is a sectional view showing the configuration of a temperature switch used in the oven toaster according to the first embodiment.

FIG. 6 is a rear view showing the configuration of the temperature switch when viewed from the direction of arrow Y in FIG. 5;

FIG. 7 is a side view corresponding to FIG. 3 showing a configuration of an oven toaster according to a second embodiment of the present invention.

FIG. 8 is an exploded perspective view showing a configuration around a cooking chamber of the oven toaster according to the second embodiment.

FIG. 9 is a plan view showing a cross-section of a part of the end of the oven toaster according to the second embodiment on the side of the device storage space.

FIG. 10 is a front view showing a configuration of a case rear plate of the oven toaster according to the second embodiment.

FIG. 11 is a sectional view taken along the line XX in FIG. 7;

FIG. 12 is a cross-sectional view corresponding to FIG. 11, showing a configuration of an oven toaster according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inner box, 1a ... Cooking room, 2 ... Bottom wall (wall of cooking room), 3, 4 ... Side wall (wall of cooking room), 5-7 ... Reflection plate (wall of cooking room), 21, 22 ... Electric heater, 23: grid, 25: sliding hole of grid, 31: temperature switch (temperature sensitive element), 34: cup (thermal surface of temperature switch), 51: heat transfer plate, 53: hot air passage, 53a ... Exit of hot air passage.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yasushi Takai 43rd Horiyamashita, Hadano-shi, Kanagawa Prefecture Inside Tokyo Hadano Plant (72) Inventor Hiroshi Uzawa 43rd Horiyamashita, Hadano-shi, Kanagawa Prefecture Tokyo Electric Hadano Plant, Inc. (56) References JP-A-4-240313 (JP, A) JP-A-3-294722 (JP, A) JP-A-3-100703 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) A47J 37/08 F24C ⁷ /00-7/08

Claims (3)

(57) [Claims] An electric heater is moved to a cooking chamber in a front-rear direction.
And a cooking net, respectively, and a temperature of the cooking chamber.
Temperature sensitive element that is sensitive to
When the temperature of the cooking chamber reaches a set temperature or higher,
The power to the electric heater is cut off or limited.
In a heat cooker, a grill sliding to guide the movement of the grill.
A pair of metal left and right sides that define the cooking chamber with holes
The outer surface of one of the side walls has hot air
A metal heat transfer plate forming a passage is covered with the grid sliding hole.
Attach the heat sensitive surface of the temperature sensitive element to this heat transfer plate.
And attaching the temperature sensitive element to the heat transfer plate.
A cooking device to be considered. 2. The method according to claim 1, wherein said sliding hole is located above said grille sliding hole.
Located at the outlet side of the hot air passage,
2. The heat transfer plate according to claim 1, wherein the heat transfer plate is attached to the heat transfer plate.
Heating cooker. 3. A multi-layered refrigerator which is arranged vertically apart from each other in a cooking chamber.
Number of electric heaters and a grill placed between them
And are sensitive to the temperature of the cooking chamber.
Temperature sensitive element, which is based on the sensitive operation of this element.
When the temperature of the cooking chamber reaches a set temperature or higher,
Heating control in which the power to the air heater is cut off or limited
In a device, the temperature sensitive element is disposed outside the cooking chamber.
The heat-sensitive surface of the temperature-sensitive element
Of the metal cooking chamber component walls that partition the chamber,
Below and at the lowest position of each of the electric heaters.
Thermally connected to the wall behind the electric heater
A cooking device characterized by the following .