JP2013040760A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker that can solve such a problem that cleaning of a cooker is troublesome.SOLUTION: An IH cooking heater includes a cabinet, an IH heater disposed in an upper part of the cabinet, a roaster part 9 having a heating chamber 10 that opens to the front face of the cabinet, an operation part disposed on the front face of the cabinet, and an exhaust port disposed at an upper deep side of the cabinet. The roaster part comprises a door that is mounted as swingable in a front-rear direction, rails to mount the door as swingable, an upper heater 22 disposed on a ceiling of the heating chamber, a lower heater 23 disposed in a lower part of the heating chamber, and a heating tray 40 disposed between the upper heater and the lower heater. The rails are disposed below the bottom face of the heating chamber, at a prescribed distance from the bottom face. The lower heater is disposed between the rails. Since the lower heater is concealed not to be exposed to the inside of the heating chamber, the bottom face of the heating chamber is made flat, which facilitates a cleaning care of the cooker.

Description

  The present invention relates to a cooking device having heaters above and below a heating chamber.

  A lower electric heater and an upper electric heater are provided in the heating chamber of the roaster, the saturated steam generated outside the heating chamber is guided to the heating chamber, and the saturated steam is sprayed on the lower electric heater in the heating chamber. A heating cooker that generates superheated steam and combines the heating by the superheated steam and the heating by the lower electric heater and the upper electric heater to optimally cook the food to be cooked -22790 (Patent Document 1)).

  However, in the conventional cooking device disclosed in Patent Document 1, the upper electric heater and the lower electric heater in the roaster are arranged in an exposed state in the heating chamber. Therefore, in the heating chamber, when food is heated only by the upper electric heater and the lower electric heater, oil from the food adheres to the upper electric heater and the lower electric heater, resulting in smoke and ignition. There's a problem. For this reason, there is a problem that the upper electric heater and the lower electric heater are contaminated and time-consuming to clean.

JP 2009-22790 A

  Then, the subject of this invention is providing the heating cooker which can eliminate the problem that it takes an effort for cleaning.

  In order to solve the above problems, a heating cooker according to the present invention is provided on a cabinet, an IH heater provided on the upper portion of the cabinet, a roaster unit having a heating chamber opened on the front surface of the cabinet, and a front surface of the cabinet. An IH cooking heater comprising an operation port and an exhaust port provided on the upper back side of the cabinet, wherein the roaster portion is configured to swing in the front-rear direction, and to swing the door portion. A rail part for movably mounting, an upper heater provided on the top surface of the heating cabinet, a lower heater provided at the lower portion of the heating cabinet, and a heating tray provided between the upper heater and the lower heater The rail portion is provided below the bottom surface of the heating chamber at a predetermined interval, and the lower heater is provided between the rail portions. Data, by concealed so as not to be exposed to the inside of the heating chamber, is characterized in that to facilitate the cleaning of the cleaning by the flat bottom surface of the heating chamber.

  According to the above configuration, there is no smoke or fire due to the oil from the heated food material adhering to both heaters, and contamination of both heaters can be prevented.

  Moreover, the said heating tray is plate shape and you may make it the oil component generate | occur | produced on the said heating tray not dripping below.

  According to this, it is possible to solve the problem that much time is required for cleaning.

  The heating tray may further have a corrugated plate shape.

  According to this, it is possible to solve the problem that much time is required for cleaning.

  As apparent from the above, the heating cooker according to the present invention includes a heating chamber in addition to an upper heater chamber temperature sensor that detects a temperature related to the upper heater chamber and a lower heater chamber temperature sensor that detects a temperature related to the lower heater chamber. When a heating chamber temperature sensor for detecting the temperature inside is provided and the upper heater and the lower heater are driven by the heating control unit according to the detected temperatures of the upper heater chamber temperature sensor and the lower heater chamber temperature sensor, When the temperature in the heating chamber becomes equal to or higher than the target temperature, the output of at least one of the upper heater and the lower heater is reduced, so that the upper heater and the lower heater are placed indoors in order to prevent smoke and fire due to oil. Even when housed in the container, the temperature in the heating chamber can be maintained at a desired temperature according to cooking, and the finishing of cooking can be improved.

It is a perspective view in the IH cooking heater as an example of the heating cooker of this invention. It is a front view of the state which removed the front panel in FIG. It is a figure which shows typically the vapor | steam path | route from the steam generator in FIG. It is a block diagram of the heating control system in the roaster part of FIG. It is a figure which shows the control result by the heating control part in FIG. It is a figure which shows the conventional control result.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a perspective view of an IH (electromagnetic induction heating) cooking heater as an example of a heating cooker according to the present embodiment as viewed from the front and obliquely above. FIG. 2 is a front view showing a state in which the front panel is removed in FIG.

  As shown in FIGS. 1 and 2, the present IH cooking heater has a top plate 2 provided on the upper surface of the cabinet 1 and two IH heaters, a right IH heater 3 and a left IH heater 4, on the front side. It is arranged with a gap. Further, a central IH heater 5 is arranged between the IH heaters 3 and 4 and on the rear side. An intake port 6 is provided on the right side of the rear surface side of the top plate 2, and an exhaust port 7 is provided on the left side of the rear surface side of the top plate 2. An IH operation unit 8 is disposed on the front side of the top plate 2. Here, the “front side” is the opening side of the heating chamber 10 of the roaster unit 9, and the “rear side” is the side opposite to the opening side of the heating chamber 10.

  A steam generator 12 is disposed at the center of the front panel 11 on the front side of the cabinet 1, and a heating chamber 10 is disposed on the left side of the front panel 11. On the front side of the heating chamber 10 and the steam generator 12, there is provided a door 14 with a handle that is slidably attached in the front-rear direction by rail units 13a and 13b.

  A packing (not shown) is attached around the opening of the heating chamber 10 in the front panel 11, and the periphery of the opening of the heating chamber 10 is sealed by the packing with the door 14 with a handle closed. . When the door 14 with the handle is closed, a gap for ventilation is provided between the front side of the steam generator 12 and the door 14 with the handle.

  The steam generator 12 includes a water tank 15 and a heater unit 16 that heats the water tank 15. As for this heater part 16, the heating part protrudes from the baseplate in the shape of a truncated cone. By heating the water tank 15 with the heater unit 16, the water in the water tank 15 boils and steam is generated. The steam generated in this manner is supplied to the heating chamber 10, and the cooking material is heated and cooked by the steam supplied from the steam generator 12 and a heat source such as a sheathed heater.

  Further, a front operation unit 19 for the roaster unit 9 having a liquid crystal display unit 17 and an operation key unit 18 is disposed on the right side of the steam generator 12 in the front panel 11.

  As shown in FIG. 2, the roaster section 9 includes a heating chamber 10, an upper heater 20 made of, for example, a sheathed heater disposed on the upper portion of the heating chamber 10, and, for example, a seeds disposed on the lower portion of the heating chamber 10. The lower heater 21 made of a heater or the like, the upper heater chamber 22 partitioned from the heating chamber 10 by a metal plate covering the upper heater 20, and the heating chamber 10 is partitioned by a metal plate covering the lower heater 21. And a lower heater chamber 23. Thus, by storing the upper heater 20 and the lower heater 21 in the upper heater chamber 22 and the lower heater chamber 23, the oil from the heated food material adheres to both the heaters 20, 21. There is no smoke or fire, and both the heaters 20 and 21 can be prevented from being soiled.

  A right IH inverter circuit 24 for the right IH heater 3, a central IH inverter circuit 25 for the central IH heater 5, and a left IH are located behind the front operation unit 19 and on the right side of the steam generator 12. A left IH inverter circuit 26 for the heater 4 is stacked and disposed.

  FIG. 3 schematically shows a steam path for supplying the steam generated by the steam generator 12 to the heating chamber 10. The upper part of the water tank 15 of the steam generator 12 is connected to the upper heater chamber 22 by a steam tube 27. Then, the saturated steam supplied to the upper heater chamber 22 via the steam tube 27 is ejected into the heating chamber 10 from a steam supply hole 28 formed on the lower surface of the upper heater chamber 22. At that time, the superheated steam can be ejected into the heating chamber 10 by driving the upper heater 20 to further heat the saturated steam.

  That is, the functions of the roaster unit 9 in the present embodiment include grill cooking and oven cooking by the upper heater 20 and the lower heater 21, grill cooking and oven cooking by superheated steam from the steam supply hole 28, and from the steam supply hole 28. For example, salt-reduced cooking by condensation of saturated steam, steam cooking with saturated steam from the steam supply hole 28, and the like.

  By the way, in the present embodiment, the upper heater 20 and the lower heater 21 of the roaster section 9 are accommodated in the upper heater chamber 22 and the lower heater chamber 23. Therefore, when the temperature in the heating chamber 10 is controlled based only on the temperature detected by the lower temperature sensor after being installed in the upper heater chamber 22 and the lower heater chamber 23, Since there is a deviation from the temperature detected by the lower temperature sensor, it is very difficult to manage the temperature in the heating chamber 10. Therefore, in the present embodiment, as shown in FIG. 3, the upper heater chamber temperature sensor 29 for detecting the temperature in the upper heater chamber 22 and the lower heater chamber temperature sensor 30 for detecting the temperature in the lower heater chamber 23 are used. In addition, a heating chamber temperature sensor 31 that detects the temperature in the heating chamber 10 is provided.

And, in the case of grill cooking and oven cooking by the upper heater 20 and the lower heater 21, as shown in Table 1,
The target temperature of the upper heater chamber 22, the lower heater chamber 23, and the heating chamber 10 is preset in accordance with the heating load, and the heating controller 32 controls the upper heater chamber temperature sensor 29 and the lower heater chamber temperature sensor. The driving of the upper heater 20 and the lower heater 21 is controlled so that the temperature in the heating chamber 10 becomes the target temperature based on the temperature detected by the heating chamber temperature sensor 31 and the heating chamber temperature sensor 31.

The heating load in that case is as shown in Table 2 in which the temperature in the heating chamber 10 detected by the heating chamber temperature sensor 31 is as shown in Table 2.
The determination is made based on the elapsed time during which the temperature rises by a preset temperature.

  Each target temperature shown in Table 1 and the temperature and elapsed time for heating load judgment shown in Table 2 are merely examples, and the present invention is not limited to the contents of Tables 1 and 2 and the temperatures described below. Is not to be done.

FIG. 4 shows a block diagram of the heating control system of the roaster unit 9. Hereinafter, according to FIG. 4, the heating control of the roaster section 9 in the present embodiment will be described.

  The load determination unit 33 of the heating control unit 32 determines the heating load based on the detection signal from the heating chamber temperature sensor 31 and the time signal from the timer 34. And the target temperature setting part 35 according to the said heating load determined by the load determination part 33, the heating category (grill or oven) set from the operation key part 18 of the front operation part 19, and preset temperature, According to Table 1 stored in the memory 36, target temperatures of the upper heater chamber 22 temperature, the lower heater chamber 23 temperature, and the heating chamber 10 temperature are set.

  After that, the heating control unit 32 controls the upper heater drive circuit 37 to drive the upper heater 20, while controlling the lower heater drive circuit 38 to drive the lower heater 21. And if the temperature in the heating chamber 10 detected by the heating chamber temperature sensor 31 becomes more than the said target temperature, the output of the upper heater 20 and the lower heater 21 will be reduced. Specifically, the operations of the upper heater driving circuit 37 and the lower heater driving circuit 38 are stopped. Alternatively, the duty ratio of the on / off operation of the upper heater drive circuit 37 and the lower heater drive circuit 38 is lowered. Alternatively, if the upper heater drive circuit 37 and the lower heater drive circuit 38 are inverter control circuits, the drive frequencies of the upper heater 20 and the lower heater 21 are reduced.

  FIG. 5 shows a heating control unit when the target temperature in the upper heater chamber 22 is 280 ° C., the target temperature in the lower heater chamber 23 is 225 ° C., and the target temperature in the heating chamber 10 is 170 ° C. The control result by 32 is shown. As can be seen from FIG. 5, since the output of the upper heater 20 and the lower heater 21 is reduced when the temperature in the heating chamber 10 reaches the target temperature of 170 ° C., the temperature rise in the heating chamber 10 is suppressed and the target temperature is reduced. Stable at around 170 ° C. As a result, in the case of grill cooking, appetizing burns can be applied to the front and back surfaces of the fish. In addition, in the case of oven cooking, the surface of the cake is not burned and the pudding does not stand up, and a good finished state can be obtained.

  On the other hand, when the temperature in the heating chamber 10 is controlled only by the temperatures in the upper heater chamber 22 and the lower heater chamber 23, the temperature in the upper heater chamber 22 is as shown in FIG. The temperature in the lower heater chamber 23 is controlled to be near the target temperature 225 ° C. near the target temperature 280 ° C., but the temperature in the heating chamber 10 continues to rise gradually even when the target temperature reaches 170 ° C. Therefore, in the case of grill cooking, the front and back surfaces of the fish may be burnt. In addition, in the case of oven cooking, the surface of the cake may be burnt or the pudding may be frustrated.

  Here, as shown in FIG. 3, the heated food 39 is placed directly on the tray 40 in the present embodiment. The tray 40 is heated by the radiant heat from the upper heater chamber 22 and the radiant heat from the lower heater chamber 23. Therefore, when it is not easy to increase the temperature of the tray 40 while maintaining the baking capability because it is easy to burn like “tacking”, the charging to the lower heater 21 is performed regardless of the target temperature shown in Table 1. The electric power is greatly reduced with respect to the electric power supplied to the upper heater 20. For example, it is desirable to set it to 30% or less (including 0%) of the input power to the upper heater 20.

  In the present embodiment, when the temperature in the heating chamber 10 is equal to or higher than the target temperature, the outputs of both the upper heater 20 and the lower heater 21 are reduced. However, the present invention is not limited to this, and the output of at least one of the upper heater 20 and the lower heater 21 may be reduced.

  In the present embodiment, the upper heater 20 and the lower heater 21 are driven in accordance with the heating load determined by the load determination unit 33 so that the food 39 to be heated is cooked. Here, the heating load “no load” means a state in which there is no food to be heated 39 in the heating chamber 10, and when the heating chamber 10 is preheated or the inside of the heating chamber 10 is heated. This corresponds to the case where the food 39 is taken out. Therefore, according to the present embodiment, in the case of the “preheating”, the heating load is in the “no load” state for the series of operations of preheating → input of the heated food 39 → removing the food 39 while being heated. In the case of “input of heated food 39”, the heating control is performed in a state where the heating load is “small or large”, and in the case of “removal of food 39 while heated” Can be dealt with by performing heating control in a state where the heating load is "no load". That is, the heating control can be switched in real time for the above series of operations.

  By the way, when the oven cooking at 200 ° C. is performed on the food to be heated having the heating load “small” as in the case of “take out the food 39 while being heated”, the heating load becomes “no”. In the case of a sudden change, although the heating control is finally performed in the “no load” state as described above, the temperature in the upper heater chamber 22 and the lower heater are changed when the heating load changes. The target temperature of the temperature in the chamber 23 is set higher than the actual heating load (upper heater chamber 22: 275 ° C., lower heater chamber 23: 255 ° C.). Therefore, when the door 14 with the handle is closed, the temperature in the heating chamber 10 rises rapidly, and the temperature in the heating chamber 10 exceeds the target temperature of 200 ° C. within ± 10% of the preferable range and hunts. Resulting in.

  Therefore, the heating control unit 32 refers to the table 1 stored in the memory 36 by the target temperature correction unit 41, and the overshoot detection temperature at which the temperature in the heating chamber 10 is set higher than the target temperature 200 ° C. When overshooting to (220 ° C.), the target temperature of the upper heater chamber 22 is corrected to, for example, 225 ° C. lower than the above 275 ° C. Similarly, the target temperature of the lower heater chamber 23 is corrected to, for example, 205 ° C. lower than the above 255 ° C. By carrying out like this, the hunting of the temperature in the heating chamber 10 can be suppressed within ± 10% with respect to the target temperature of 200 ° C. Therefore, the temperature in the heating chamber 10 can be rapidly converged to the target temperature 200 ° C. Thereafter, as described above, after the load determination unit 33 determines that the heating load is “no”, the control shifts to heating control in a state where the heating load is “no load”.

  In the present embodiment, when the temperature in the heating chamber 10 overshoots to the overshoot detection temperature, the target temperatures of both the upper heater chamber 22 and the lower heater chamber 23 are corrected downward. ing. However, the present invention is not limited to this, and it is only necessary to correct the target temperature of at least one of the upper heater chamber 22 and the lower heater chamber 23 downward.

  In addition, as described above, the function of the roaster unit 9 includes reduced salt cooking by condensation of saturated steam from the steam supply hole 28. In this case, at the time of grill cooking, the saturated steam generated by the steam generator 12 is supplied to the upper heater chamber 22 through the steam tube 27, and is ejected from the steam supply hole 28 into the heating chamber 10 to be heated in the heated food 39. By condensing the saturated steam, excess salt and oil and fat on the surface of the heated food 39 are melted and removed in the condensed water. At that time, if the temperature in the upper heater chamber 22 is too low, steam is condensed in the upper heater chamber 22 and cannot be supplied to the heated food 39, so that the salt reduction treatment cannot be performed. On the other hand, if the temperature in the upper heater chamber 22 is too high, the vapor evaporates in the upper heater chamber 22 and cannot be supplied to the heated food 39, so that the salt cannot be reduced.

  Therefore, in the present embodiment, as shown in Table 1, the target temperature setting unit 35 uses the target temperature of the heating chamber 10 during the salt reduction treatment as the target temperature of the heating chamber 10 during oven cooking. The temperature is set lower than the temperature. Therefore, it is possible to prevent the saturated steam supplied to the upper heater chamber 22 from condensing or evaporating in the upper heater chamber 22, and accurately supplying the heated food material 39 to perform the salt reduction treatment. It can be done.

  It should be noted that the ejection of saturated steam from the steam supply hole 28 into the heating chamber 10 is not limited to the above-described salt-reduced cooking, and the finish of the dish is moistened by adjusting the amount of steam supplied and the like. be able to.

  Moreover, in this Embodiment, the said heating control part 32 performs sequence control according to a cooking menu, and the sequence control which changes according to the quantity (heating amount) of the to-be-heated food 39 in that case I do. Therefore, the heating control unit 32 sets the temperature in the heating chamber 10 detected by the heating chamber temperature sensor 31 from 150 ° C. as the lower set temperature stored in the memory 36 to 150 as the upper set temperature. The first elapsed time while rising to ° C. and the second elapsed time while rising from 210 ° C. to 230 ° C. are measured according to the timing signal from the timer 34, and the heating amount is determined based on the measurement result. A heating amount determination unit 42 is provided.

  By the way, by the heating amount determination unit 42, the first heating amount determination period in which the first elapsed time is measured, the second heating amount determination period in which the second elapsed time is measured, or the first heating. When the door 14 with the handle of the roaster unit 9 is opened near the amount determination period or near the second heating amount determination period, the temperature inside the heating chamber 10 fluctuates and accurate heating amount determination becomes impossible. . Therefore, in the present embodiment, the heating amount determination unit 42 determines the heating amount as follows based on the detection signal from the door opening / closing detection unit 43 including a switch or the like attached to the door 14 with a handle. Do it.

  That is, based on the detection signal from the door opening / closing detection unit 43, the first heating amount determination period or the second heating amount determination period, or the vicinity of the first heating amount determination period or the second heating amount determination period. In the vicinity, it is monitored that the door 14 with the handle is opened. When the door 14 with the handle is opened, the lower set temperature and the upper set temperature are set to the high temperature side for a preset time so as not to affect the opening of the door 14 with the handle. Shift and measure the elapsed time. By doing so, it is possible to prevent an error from occurring in the heating amount of the heated food material 39 due to the opening and closing of the door 14 with the handle.

  Further, in order to open and close the door 14 with the handle, either in the first heating amount determination period or in the vicinity of the first heating amount determination period, or in the second heating amount determination period or in the vicinity of the second heating amount determination period. If the determination of the heating amount cannot be performed, the determination result of the heating amount is set in advance to the minimum amount stored in the memory 36. Thus, even when the heating amount cannot be determined, cooking can be performed.

  In the above embodiment, the load determination unit 33 and the heating amount determination unit 42 are provided separately. However, both the determination units 33 and 42 measure the elapsed time during which the temperature in the heating chamber 10 rises from the lower set temperature to the upper set temperature based on the time signal from the timer 34. . Therefore, it is possible to integrate the load determination unit 33 and the heating amount determination unit 42 into one.

  Further, in the above embodiment, the heating control unit 32 includes the temperature in the upper heater chamber 22 detected by the upper heater chamber temperature sensor 29 and the temperature in the lower heater chamber 23 detected by the lower heater chamber temperature sensor 30. The upper heater 20 and the lower heater 21 are driven based on the temperature. However, the present invention is not limited to this, and the upper heater 20 and the lower heater 21 may be driven based on the temperature of the upper heater chamber 22 and the temperature of the lower heater chamber 23. In short, the driving may be performed based on the temperature related to the upper heater chamber 22 and the temperature related to the lower heater chamber 23.

  Moreover, in the said embodiment, the steam generator 12 is arrange | positioned in the center part of the said front panel 11, and the roaster part 9 is arrange | positioned in the left side of the front panel 11. FIG. However, the present invention does not specify these arrangements. For example, the roaster section 9 may be arranged at the center of the front panel 11 and the steam generator 12 may be arranged on the left or right side of the front panel 11. Absent.

  In the above embodiment, the steam from the steam generator 12 is supplied to the upper heater chamber 22 when cooking with the superheated steam or saturated steam. However, the present invention is not limited to this, and may be supplied to the lower heater chamber 23. By doing so, the heated food 39 can be wrapped and cooked by the steam rising from the steam supply hole of the lower heater chamber 23, so that grill cooking and oven cooking with superheated steam, steaming cooking with reduced steam, reduced salt cooking, etc. Can be performed more effectively than when steam is supplied to the upper heater chamber 22, and a better finish can be obtained.

  Moreover, in the said embodiment, although the case where the heating cooker of this invention was applied to the IH cooking heater was demonstrated to the example, even if it applies to not only this but a microwave oven etc., it does not care. Moreover, in the said embodiment, the heating cooker of this invention is applied to the roaster part which can perform both cooking by the upper heater 20 and lower heater 21 which consist of a sheathed heater etc., and cooking by superheated steam or saturated steam. doing. However, the present invention is not limited to this, only cooking by the upper heater 20 and the lower heater 21, both cooking by the upper heater 20 and the lower heater 21 and cooking by superheated steam or saturated steam, superheated steam or saturation. It can be applied only to cooking with steam.

  According to the cooking device of the present invention, healthy cooking is performed by using steam or superheated steam in a cooking heater (including an electric stove such as an IH heater or an electric heater or a gas stove using an electric stove), a microwave oven, or the like. be able to. For example, in the cooking device of the present invention, superheated steam or saturated steam having a temperature of 100 ° C. or higher is supplied to the food surface, and the superheated steam or saturated steam attached to the food surface is condensed to give a large amount of latent heat of condensation to the food. Therefore, heat can be efficiently transmitted to the food, the food surface is baked crisply, and cooking with a good finish can be performed. Moreover, the condensed water adheres to the surface of the food and drops together with the excess salt and fats and oils, whereby the salt and fats and oils in the foods can be reduced. Further, the inside of the heating chamber 10 is filled with superheated steam or saturated steam and becomes anoxic, thereby enabling cooking while suppressing oxidation of food.

3, 4, 5 ... IH heater,
6 ... Inlet,
7 ... Exhaust port,
9 ... roaster,
10 ... heating chamber,
12 ... steam generator,
14 ... Door with handle,
18 ... operation key part,
19 ... Front operation unit for roaster unit,
20 ... Upper heater,
21 ... Lower heater,
22 ... Upper heater room,
23 ... Lower heater room,
28: Steam supply hole,
29 ... Upper heater chamber temperature sensor,
30 ... Lower heater chamber temperature sensor,
31 ... heating chamber temperature sensor,
32 ... Heating control unit,
33 ... Load determination unit,
35 ... target temperature setting section,
36 ... Memory,
37 ... Upper heater drive circuit,
38 ... Lower heater drive circuit,
39 ... heated ingredients,
40 ... Tray,
41 ... Target temperature correction unit,
42 ... heating amount determination unit,
43: Door open / close detection unit.

Claims (3)

Cabinet,
An IH heater provided at the top of the cabinet;
A roaster unit having a heating chamber that opens in front of the cabinet;
An operation unit provided on the front of the cabinet;
An exhaust port provided on the upper back side of the cabinet;
An IH cooking heater consisting of
The roaster section is
A door part that is swingably mounted in the front-rear direction;
A rail portion for swingably mounting the door portion;
An upper heater provided on the top of the heating chamber;
A lower heater provided at a lower portion of the heating chamber;
A heating tray provided between the upper heater and the lower heater;
Consists of
The rail portion is provided below the bottom surface of the heating chamber at a predetermined interval,
The lower heater is provided between the rail parts,
The IH cooking heater is characterized in that the lower heater is concealed so as not to be exposed inside the heating chamber, thereby making the bottom surface of the heating chamber flat to facilitate cleaning.   2. The IH cooking heater according to claim 1, wherein the heating tray has a plate shape so that oil generated on the heating tray does not drop downward. 3.   The IH cooking heater according to claim 2, wherein the heating tray further has a corrugated plate shape.