JPH0621532U - Electric heating cooker - Google Patents

Abstract

(57) [Summary] [Purpose] The surface heater is used while suppressing thermal deformation, so that heating efficiency is improved and stabilized, and cooking at a set temperature can be successfully achieved over a long period of time. A flat surface heater 2 is provided on the bottom of a main body case 7, and a plate-shaped or container-shaped cooking plate 1 is detachably mounted on the surface heater 2 to heat it. The surface heater 2 is curved, and the placing surface 97 of the cooking plate 1 on the surface heater 2 is curved so as to match the curved shape of the surface heater 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric heating cooker, and in particular, a cooking plate having a predetermined shape such as a container type or a dish type is detachably placed on a heat source part provided at the bottom of a main body case to heat the cooking plate. The present invention relates to an electric heating cooker configured to do.

[0002]

[Prior art]

 This type of electric heating cooker heats the cooking plate from the bottom by the heat source such as the heater itself or a heating plate with the heater built-in, and cooks on the cooking plate according to the shape of the dish, stir-fry cooking, or simmered food. You can cook, etc.

Particularly, when cooking fried foods and cooked fried foods, fats, cooking juices, ingredients, etc. are easily scattered and often stain the surroundings.

By the way, since the heat source and the cooking plate become hot due to heat generation and heating, it is dangerous if they are placed directly or touched by a person. Therefore, the heat source and cooking plate are surrounded by the main body case made of resin or metal plate, excluding the cooking surface.

However, when the main body case is made of resin, direct contact with a heat source or a cooking plate causes early deterioration and burning, and when the main body case is made of a metal plate, it is also heated by heat conduction, which causes other problems. If it comes into direct contact with, the same problem as the heat source and the cooking plate will be a problem.

To solve this problem, the main body case is provided with a thermal safety space between the heat source and the cooking plate. Therefore, the easily spattered fat, cooking juice, ingredients, etc. also invade the gap and stain this portion as well.

[0007] The dirt has a property of being hard to be removed because it contains fat, and it is not easy to clean the cooking plate itself exposed on the surface, but it is more difficult to clean the gap. Is.

In order to deal with this, in the past, it has been attempted to separately remove the cooking plate. This makes the cooking board independent of the power supply and other electrical equipment, and can be washed as a whole, making it easy to clean. In addition, the gap between the main body case and the cooking plate is opened to facilitate cleaning.

By the way, in order to make the cooking plate separable from the heat source, there is provided one in which a sheathed heater is arranged in a bare state and the cooking plate is brought into contact with it. However, this makes it difficult to achieve sufficient contact for heat conduction. Therefore, by using a heat source with a sheathed heater embedded in a heating plate made of a material with good thermal conductivity such as aluminum, the heating efficiency is increased by making contact with the heating plate and the cooking plate over a wide area. It has been adopted.

[0010]

[Problems to be solved by the device]

 However, the use of a hot platen causes weight increase and price increase of products. Recently, the cooking temperature has been raised to improve the performance of the cooking device. However, the heat capacity of the heating plate is so large that the heat is not easily dissipated. The efficiency does not increase so much.

Further, there is a problem that overheating is likely to be caused by the high temperature setting, and the overheated state is not easily resolved, and the sheath heater is easily broken. Part of the hot platen may melt.

Further, even when overheating does not occur, the temperature is not lowered immediately after the high temperature setting state, so that unnecessary heat fatigue is given to the heater and the life of the heater is shortened.

In order to solve this, it is conceivable to use a known surface heater. Since the surface heater is formed flat and has a large heat generating surface, it can make contact with the cooking plate over a sufficient area, and even if it includes a thin case, it has a small heat capacity. It is possible to avoid the disconnection and the shortening of life as in the case of the hot platen.

However, as a result of experiments conducted by the present inventor, it was found that the overheating efficiency decreases with time.

As a result of various researches and examinations regarding this, the cause is that the surface heater is thermally deformed as the temperature rises and becomes wavy, and the surface contact with the cooking plate is impaired.

Therefore, the present invention, based on such a new finding, adopts an electric heating cooker capable of solving the above-mentioned problems by adopting a surface heater with a simple improvement that is resistant to thermal deformation. The challenge is to provide.

[0017]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a flat surface heater on the bottom of a main body case, and a dish-type or container-type cooking plate is detachably mounted on the surface heater. The surface heater is curved so that it is placed on the surface heater to be heated, and the mounting surface of the control panel on the surface heater is curved so as to match the curved shape of the surface heater. .

[0018]

[Action]

 According to the above configuration of the present invention, the surface heater provided at the bottom of the main body case has a curved shape and has a high deformation rigidity. It is possible to maintain good surface contact with the placement surface of the cooking plate, and to sufficiently transfer the heat of the surface heater to the cooking plate for cooking.

Further, since the surface heater is thin as a whole and has a small heat capacity, it radiates heat sufficiently even in a high temperature setting state and is easily consumed by the cooking plate. Therefore, in this aspect, the heating efficiency is improved, and the overheating state is less likely to occur. The temperature can be smoothly lowered from the overheated state or the high temperature setting state, and wasteful temperature maintenance and heat consumption can be eliminated.

[0020]

【Example】

 Hereinafter, a first embodiment of the present invention shown in FIGS. 1 to 8 will be described in detail with reference to the drawings.

1 to 3, this embodiment shows a so-called hot plate type electric heating cooker having a shallow dish-shaped cooking board 1. The cooking plate 1 is a thick body made of metal such as aluminum.

The heater 2 that heats the cooking plate 1 from its bottom is a flat heater that is fixed to the heat shield plate 3 that is attached to the upper surface of the bottom of the main body case 7 by the metal fasteners 4 with the screws 51. Has been done.

As shown in FIG. 3, the heater 2 receives the central portion of the cooking plate 1 that leaves the periphery of the bottom, and most of the cooking plate 1 fits in the recess of the shallow dish-shaped heat shield plate 3. Stabilize in a tight fit.

Between the heat shield plate 3 and the main body case 7 and between the heat shield plate 3 and the heater 2, the heat insulating spaces 52 and 53 for preventing the heat of the heater 2 from reaching the lower surface of the cooker. Is provided.

In particular, the fastener 4 includes a spacer 54 that defines the heat-insulating space 52. The spacer 54 is provided with a ventilation hole 55, so that the space from the heat shield plate 3 to the bottom of the main body case 7 is provided. The heat conduction through the rotor 54 is suppressed.

The body case 7 is made of synthetic resin, and the receiving portion 8 of the cooking plate 1 is opened on the upper surface together with the rim of the heat shield plate 3.

An operation member 27 for turning on and off the heater 2 and setting a temperature is provided on a portion of the main body case 7 that projects to one side of the opening of the receiving portion 8. For example, temperature control for heater control is possible. An electric device 31 including a thermostat, a set temperature indicator 56 and an operation panel unit 11 equipped with a lighting display unit (not shown) are provided, and a display surface 11a is provided upward.

The operating portion 27 a of the operating member 27 is projected laterally through a lateral slit portion 71 formed between the main body case 7 and a cover 70 forming a part of the bottom portion of the main body case 7 so that the operating portion 27 a can be slid laterally. It is provided in. Legs 57 are attached to the lower surface of the bottom of the body case 7 with screws.

A synthetic resin main body cover 61 as shown in FIGS. 3, 5, and 6 is detachably covered from above on the upper surface of the main body case 7 including the operation panel portion 11.

In the main body cover 61, a claw 62 provided on the lower edge of the operation panel 11 side is elastically engaged with a locking portion 63 provided on the lower edge of the main body case 7 so that it can be temporarily fixed in the mounted state. I have to.

An engaging protrusion 64 as shown in FIGS. 1 and 8 is attached by a screw 68 to the side of the body cover 61 opposite to the operation panel 11.

As shown in FIG. 8, the engagement protrusion 64 has a substantially downward arrow shape, and when the main body cover 61 is properly covered with the main body case 7, the main body case 7 has the shape shown in FIG. The head portion of the tip elastically engages with the engagement spring 65 that is screwed to and is locked in the mounting posture.

A guide 60 is integrally formed at the bottom of the main body case 7 so that this elastic engagement can be achieved easily and surely without the engagement protrusion 64 escaping.

The free end of the engagement spring 65 is provided as an operating portion 66 so as to project laterally through the lateral slit 72 of the main body case 7 and to be slidable in the lateral direction.

A body cover pushing-up spring 73 is attached to the side of the engagement spring 65 of the body case 7 together with an engagement spring 65, and the engagement protrusion 64 elastically engages with the engagement spring 65 as described above. At this time, the engagement protrusion 64 presses the main body cover push-up spring 73 downward to charge it.

As a result, the main body cover push-up spring 73 acts so as to push the main body cover 61 upward from the main body case 7 via the engagement protrusion 64.

However, the engagement spring 65 that elastically engages the engagement protrusion 64 and elastically locks the main body cover 61 to the proper mounting state on the main body case 7 is provided between the main body case 7 and the main body cover 61. Since it is passed through the lateral slit 72 formed in the upper part and its vertical movement is restricted, the action of the main body cover pushing-up spring 73 does not affect this, and the engaging protrusion 64 pushes up the main body cover. It remains locked at the spring pressing position, and the body cover 61 can be stabilized at the proper mounting position.

When the engagement spring 65 is moved laterally by the operating portion 66, the engagement with the tip head portion of the engagement protrusion 64 is released, so that the engagement portion side of the main body cover 61 is moved. The restoring force of the body cover pushing-up spring 73 pushes the body cover 7 upward through the engaging protrusions 65, so that the body case 7 is slightly lifted.

In this state, the main body cover 61 is temporarily fixed, and the main body cover 61 is separated from the main body case 7 by disengaging the claws 62 and the engaging portions 63 while lifting the part that is slightly raised. It can be easily removed.

The body cover 61 detachably covers the portion of the body case 7 except the receiving portion 8 that detachably receives the cooking plate 1 and the operation panel portion 11 of the body case 7, and dust or dust that may be reflected on it. However, the main body cover itself can catch the spilled juice, the fat content, the cooking juice, the ingredients, etc. scattered from the cooking plate 1 attached to the receiving portion, and prevent the other from reaching.

Although the main body cover 61 is easily soiled, it can be detached from the main body case 7 and handled independently, and since it has no electrical equipment, it can be washed as a whole.

The body cover 61 has a see-through cover 74 as a resin molded product made of a transparent synthetic resin that allows a predetermined range of the operation panel section 11 to be seen through, and the body cover 61 covers the operation panel section 11. However, the various displays of the operation panel 11 can be confirmed by the user or the like through the transparent cover 74.

The transparent cover 74 itself may be in the form of a sheet, and the mounting method can be variously changed. For example, a double-sided adhesive tape, adhesive, high frequency welding, or other fitting can be used.

The opening edge 75 of the main body cover 61 facing the opening of the receiving portion 8 of the main body case 7 extends over the opening of the receiving portion 8 and is covered therewith as shown by a phantom line in FIG. The cover flange 77, which is located just below the outward flange 3a of the heat plate 3 and which is provided at the opening of the cooking plate 1 and which extends outward and extends a little downward, is located outside the outward flange 3a of the heat shield plate 3. It is also possible to cover the upper part of the main body cover 61 so as to approach the upper surface of the main body cover 61.

This makes it difficult for dust, cooking juice, materials, etc. to enter the gap between the cooking plate 1 and the heat shield plate 3 and the gap between the heat shield plate 3 and the main body case 7. be able to .

Further, even when the cooking plate 1 is removed for washing, etc., dust or the like can be prevented from easily entering the gap between the heat shield plate 3 and the main body case 7.

As shown in FIGS. 5 and 6, the see-through cover 74 of the main body cover 61 is fitted into the opening window 81 provided in the main body cover 61 from the back side to prevent the upper cover from being held by itself. The claw 82 is brought into contact with the back surface of the opening edge of the opening window 81 to prevent the claw 82 from coming out upward, and in this state, the outer peripheral portion of the transparent cover 74 itself is elastically engaged with the locking hook 83 provided at the opening edge of the opening window 81. By engaging, the downward drop is prevented, and the opening window 81 is fitted by a simple work of only fitting from below.

The electric device 31 has a heat-sensitive rod 84 extending below the bottom of the cooking plate 1, and controls the energization of the heater 2 so as to detect the temperature of the cooking plate 1 and maintain the cooking temperature set by the operating member 27. It is supposed to do.

As shown in FIGS. 3, 6, and 7, the heat-sensitive rod 84 has a concave groove 87 of an aluminum presser 86 housed in a concave portion 85 formed in a part of the heat shield plate 3, It is press-fitted into a groove 88 formed on the bottom surface of the bottom of the cooking plate 1 to absorb dimensional errors and assembling errors so that they are in close contact with each other, so that the temperature of the cooking plate 1 can be accurately and stably sensed. I am.

A pair of left and right legs 86 a integrally formed on the lower surface of the presser 86 are vertically movably fitted to the bottom of the recessed portion 85, and are prevented from moving upward by a screw 89 while being prevented from being pulled upward by a screw 89. Then, the concave grooves 87 and 88 come close to each other so that the heat-sensitive rod 84 is press-fitted between them.

As shown in detail by disassembling the heater 2 in FIG. 4, a heater 2 is wound around rectangular mica plates 90 and 91 and formed in a plane, and is sandwiched between mica plates 93 and 94. It is a flat so-called planar heater, and is housed in a metal heater case 95, and is attached to the heater case 95 by tightening a screw 96, a spring washer 101, and a nut 102 at one central location and four peripheral locations. It is sandwiched between the cover plate 98 and the cover plate 98.

To attach the heater 2 to the heat shield plate 3 with the screw 51, a cut-and-raised piece 105 formed downward on the cover plate 98 is used.

Both the heater case 95 and the lid 98 are curved in one direction, forcibly bending the sandwiched heater 2 in the same manner.

Correspondingly, a similar curved surface 97 is formed on the bottom surface of the bottom of the cooking plate 1 which is received by the heater 2, and the heater 2 and the heater 2 are in close contact with each other.

Since the heater 2 and the heater case 95 have the curved shape as described above, the deformation rigidity is improved, and the thermal deformation of the heater 2 is less likely to occur even when the high temperature control is continued, and thus the heat of the heater 2 is reduced. It is possible to prevent the deformation from damaging the surface contact state with the cooking plate 1.

Further, since the heater 2 has a structure in which heat is more easily radiated as a heat source section than when the heater 2 is embedded in a conventional aluminum heating plate, heat is easily consumed by the cooking plate 1 and heating efficiency is improved even by this amount. Even if the high temperature setting is performed, the temperature is improved, the overheated state does not easily occur, the temperature can be smoothly lowered from the overheated state or the high temperature set state, and the heater 2 is not easily broken or thermally deteriorated, and the life is long.

It is more advantageous that the heater 2 is curved in only one direction as in the above-described embodiment, and is also formed in a spherical shape curved in any direction.

A second embodiment of the present invention shown in FIGS. 9 to 11 will be described. The present embodiment shows the case of a so-called grill pan type or electric pan type electric heating cooker having a container-type cooking board 1.

As shown in FIG. 9, the cooking plate 1 is detachably mounted on the heater 2 on the heat shield plate 3 supported in the main body case 7 as in the first embodiment.

The main body case 7 has a receiving portion 8 having a size matching the depth of the cooking plate 1, and the heat shield plate 3 attached to the bottom portion of the main body case 7 in the same manner as in the first embodiment is also the same. The outwardly formed flange 3a of the mouth edge, the opening edge 75 of the receiving portion 8 of the main body case 7, and the cover flange 77 provided outside the mouth edge of the cooking plate 1 are deeply formed. The position is similar to that of the above, and prevents invasion of dust, oil splashed during cooking, cooking juice, etc. between each part.

An electric device 31 provided in the operation panel unit 11 has a frame 111 supporting a thermostat 112 capable of temperature control and a temperature controller 113. The heat sensing unit 114 of the thermostat 112 shields heat. The plate 3 is penetrated from the lower side to the upper side to face the upper surface of the heat shield plate 3 so that the bottom portion of the cooking plate 1 placed on the heater 2 comes into contact with the heat shield plate 3.

In order to ensure this contact, the heat-sensitive portion 114 is always made to protrude slightly above the contact position with the cooking plate 1 by the elastic pad 115, and the cooking plate mounted on the heater 2 1 presses down the heat sensitive portion 114 by its own weight and closely contacts with the heater 2.

The operation member 27 is used to rotate the temperature controller 113 via the rack and pinion mechanism 116, and is operated to slide along the lateral slit 117 of the main body case 7.

The operation member 27 is provided with a set temperature indicator 56 facing the display window 118 of the operation panel unit 11, and the position is changed according to the slide operation to display the set temperature.

As shown in FIG. 11, the operating member 27 includes an operating portion 27 a, a set temperature indicator 56, and a bifurcated member 119 for transmitting the movement of the operating portion 27 a to the rack and pinion mechanism 116.

The operation portion 27a and the set temperature indicator 56 are connected and integrated by vertically engaging the dovetail groove / anterior fitting portion 121 and the projection / hole force fitting portion 122, and the bifurcated member 119 is provided therebetween. , And is fitted with the projection 122a of the projection / hole force-fitting portion 122 so as to be integrated in a retaining state.

The operation portion 27 a has a first guided portion 123 guided by the slit 117 and a second guided portion 125 guided by a guide edge 124 near the slit 117. .

As shown in detail in FIG. 10, the heater 2 winds the heater wire 92 around both of the two semicircular mica plates 131 and 132, and the heater wire 92 is wound between the two circular mica plates 133 and 134. It is sandwiched between the two to form a planar and circular so-called surface heater.

The heater 2 is housed in a flat circular heater case 137 with a heat shield plate 140 and a spring plate 136 having a cut-and-raised spring 135 arranged on the same circle sequentially applied to the back surface thereof. There is.

The lid plate 138 located on the back surface of the spring plate 136 is fixed to the heater case 137 by the metal fittings 139, so that the heater case 137 and the lid plate 138 connect the heater 2 and the heat shield plate 140 to the spring plate 136. It is sandwiched through.

Both the heater case 137 and the cover plate 138 are curved in a convex spherical shape, and the sandwiched heater 2 and heat shield plate 140 are curved so as to coincide with them.

Due to the curved shape which is curved in any direction, the deformation rigidity of the heater 2 can be further improved as compared with the case of the first embodiment.

As in the case of the first embodiment, the placing surface of the cooking plate 1 on the heater 2 is formed into a spherical curved surface 145 that matches the curved shape of the heater 2.

As shown in FIGS. 9 and 10, the cover plate 138 has a back-folded peripheral wall 141, and a ventilation cutout portion 142 is provided in the cover plate 138, which is similar to the first and first embodiments. A third heat insulating space 144 is formed between the two heat insulating spaces 52 and 53.

These first to third heat insulating spaces 52, 53, 144 and the heat shield plate 140 prevent heat from escaping to the lower surface side of the main body case 7 as compared with the case of the first embodiment. Furthermore, the heating efficiency can be taught accordingly.

[0076]

[Effect of device]

 According to the present invention, the surface heater provided at the bottom of the main body case has a curved shape and has a high deformation rigidity, and does not deform like a wave even when the temperature rises, and is formed in a similar curved shape. The surface contact condition with the placing surface of the cooking plate is kept good all the time, and the heat of the surface heater is sufficiently transmitted to the cooking plate to enable cooking, so that the heating efficiency is improved and stable, and it is stable for a long time. Cooking at the set temperature can be successfully achieved.

Further, since the surface heater is thin and has a small heat capacity as a whole, it radiates heat sufficiently even in a high temperature setting state and is easily consumed by the cooking plate. The temperature can be smoothly lowered from the overheated state or the high temperature set state, useless temperature maintenance and heat consumption can be eliminated, and heating efficiency can be improved to be inexpensive and have a long life.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a heating cooker of a hot plate knipe as a first embodiment of the present invention.

FIG. 2 is a cross-sectional view in which a part of the heating and cooking device shown in FIG. 1 is shown by changing its angle.

FIG. 3 is a plan view of a main part of the heating cooker shown in FIG.

FIG. 4 is an exploded perspective view of a heater of the heating cooker shown in FIG.

FIG. 5 is a perspective view showing the heating cooker of FIG. 1 in an exploded state.

FIG. 6 is a cross-sectional view of a main part of the heating cooker shown in FIG.

FIG. 7 is a partial cross-sectional view showing a detection unit for detecting a cooking plate temperature of the heating cooker shown in FIG.

FIG. 8 is a partial cross-sectional view showing a main body cover locking portion of the heating cooker of FIG.

FIG. 9 is a sectional view showing an electric pan type electric heater according to a second embodiment of the present invention.

10 is an exploded perspective view showing a heater of the heating cooker shown in FIG. 9. FIG.

FIG. 11 is an exploded perspective view showing an operating member of the heating cooker shown in FIG. 9.

[Explanation of symbols]

 1 Cooking Plate 2 Heater 7 Body Case 97, 145 Curved Surface

Claims (1)

[Scope of utility model registration request] 1. A flat surface heater is provided on the bottom of the main body case, and a plate-shaped or container-shaped cooking plate is detachably mounted on the flat heater to heat the plate. An electric heating cooking container, characterized in that the heater is curved, and the placing surface of the cooking plate on the surface heater is curved so as to match the curved shape of the surface heater.