CN1811277A - High frequency heating apparatus having a steam generating function - Google Patents

Abstract

The present invention provides a high-frequency heating cooker capable of quickly raising the temperature of an object to be heated to a predetermined heating temperature and utilizing steam for heating and cooking with high efficiency. The high-frequency heating cooker (100) has a high-frequency generating part (13) and a steam generating part (15) that generates steam in a heating chamber (11) where the object to be heated is placed, and can pass the high-frequency and steam At least one of them is supplied to the heating chamber (11) to heat treat the object to be heated. It has: a tray that places the object to be heated and is separated from the bottom surface of the heating chamber (11) by a predetermined interval, and is arranged above the bottom surface of the heating chamber in a detachable manner to divide the space in the heating chamber (11) ( 21); The steam generated by the steam generating part (15) is supplied to the steam delivery device (29) in the upper space above the tray (21) and the preheating device (17) that makes the overall temperature in the heating chamber rise.

Description

high frequency heating cooker

This application is a divisional application of the Chinese patent application with the application number 200410047741.1 entitled "High Frequency Heating Cooker" submitted to the Chinese Patent Office on March 12, 2004.

technical field

The present invention relates to a high-frequency heating cooker with steam generating function, in particular to a technique for improving cooking function and heating efficiency.

Background technique

Conventionally, there have been various proposals for a high-frequency heating cooker that supplies steam to a heating chamber in which an object is placed to heat the object (for example, see Patent Document 1). This high-frequency heating cooker can perform heating and cooking by appropriately combining high-frequency heating, steam heating by supplying steam, and electric heating in some models.

Patent Document 1: Japanese Unexamined Patent Publication No. 8-178298

However, when the above-mentioned high-frequency heating cooker starts heating, it takes a long time for the steam to enter the heating chamber and reach the predetermined heating temperature, so the heating and cooking time becomes longer, and the use is not necessarily convenient. In order to raise the temperature to the predetermined heating temperature as soon as possible, it is effective to increase the amount of steam, but the negative effect is that condensation often occurs on the wall surface of the heating chamber. Therefore, after heating and cooking, a large amount of water will be stored in the bottom area of the heating chamber, causing problems such as difficulty in cleaning. And because the high-temperature steam that enters condenses on the wall of the heating chamber, etc., there is also a problem that the heat of the steam is absorbed by the wall of the heating chamber, and the heating amount of the object to be heated is correspondingly reduced, so that the heating efficiency of the object to be heated is reduced. .

In addition, in recent high-frequency heating cookers, by increasing the volume of the heating chamber, it is possible to heat and cook a large object to be heated, but with the increase in the size of the heating chamber, there is a problem that the entire heating chamber cannot be heated uniformly and rapidly. difficulty. Although the lack of heating capacity can be improved by increasing the number and power of heating devices, it may not be a good solution from the viewpoint of cost reduction and energy saving for general household high-frequency heating cookers.

In addition, in the conventional high-frequency heating cooker with a steam generating function, only steam is simply supplied into the heating chamber to heat and cook the object to be heated, and there is no such thing as supplying steam at a required time during grill cooking and adjusting the grill state. function, and the performance of steam cannot be fully utilized during heating and cooking, so this type of cooker can only be used in a limited range.

Contents of the invention

The present invention is proposed after considering the above problems, and the purpose is to provide a high-frequency heating cooker, which can quickly raise the temperature of the object to be heated to a predetermined heating temperature, and can effectively use steam to realize high-efficiency heating and cooking. .

It is also an object of the invention to reduce condensation of vapors entering the heating chamber.

The above object is achieved by the following structure.

The high-frequency heating cooker of the present invention has a high-frequency generating part and a steam supply part for supplying steam into a heating chamber where an object to be heated is placed, and at least one of high-frequency and steam is supplied to the heating chamber to heat treat the object to be heated. . It has a partition board that places the object to be heated and is separated from the bottom surface of the heating chamber by a predetermined interval, and is detachably installed above the bottom surface of the heating chamber to divide the space in the heating chamber so that the above-mentioned steam enters the heating chamber. In the upper space above the above partition.

In this high-frequency heating cooker, the space in the heating chamber is divided into the space above the partition and the space other than it by setting a partition, and by supplying steam to the upper space, the space in the heating chamber used in heating cooking Responsiveness to temperature changes caused by heating can be improved without increasing the heating capacity.

In addition, in the high-frequency heating cooker of the present invention, the steam supply unit has a steam generating unit provided in the space below the partition plate in the heating chamber, and has a function of allowing the steam generated by the steam generating unit to pass through the inside of the heating chamber. A structure leading into the space above the heating chamber.

According to this structure, since the steam generating part is provided in the heating chamber, water can be heated to generate steam while heating the inside of the heating chamber, and good thermal efficiency can be obtained. Furthermore, since the above-mentioned steam is introduced upward through the inside of the heating chamber, heat loss can be reduced.

In addition, the high-frequency heating cooker of the present invention has a gap between the edge of the partition plate and the side wall of the heating chamber, and has a feature that the steam generated by the steam generating unit passes through the side wall of the heating chamber and is introduced through the gap. to the structure of the space above the heating chamber.

According to this structure, steam can be efficiently introduced into the upper space of the heating chamber with a very simple structure. And it is possible to easily form a door opening and closing device for controlling supply. In addition, in the case of a high-frequency supply port structure on the side wall, the closer to the high-frequency supply port, the stronger the high-frequency, which will cause heating deviation on the high-frequency heating element, so it will appear on the heated object. However, as mentioned above, the steam generated by the above-mentioned steam generating part can be introduced into the space above the heating chamber through the side wall of the above-mentioned heating chamber through the above-mentioned gap. The supplied high-frequency uniform heating is provided with a high-frequency heating partition. And uniform heating is achieved by steam rising through the space between the partitions.

In addition, in the high-frequency heating cooker according to the present invention, the partition plate has a through hole at its periphery, and the steam delivery device introduces the steam generated by the steam generating unit into the upper space of the heating chamber through the through hole.

With this structure, steam can be easily introduced into the upper space of the heating chamber only by forming through holes in the partition plate. It is also easy to form the door opening and closing device for controlling the supply at this time.

The high-frequency heating cooker includes, for example: a heating chamber for placing the object to be heated, a heating device for heating the heater arranged on the upper part of the heating chamber, and a heating device for generating high-frequency heating on the bottom surface of the heating chamber. A high-frequency generating device, a device for generating steam, and a tray for placing heated objects with a high-frequency heating element inside. The tray has a structure with a gap formed between it and the heating chamber. With this structure, the steam generated by the steam generating device installed on the bottom surface of the heating chamber rises, and passes through the gap between the tray and the heating chamber so that the steam remains on the upper portion of the disposed heated object.

Moreover, since the heating chamber is divided into two parts by a partition, a large amount of steam can be supplied to the object to be heated and the dispersion of the steam can be prevented. The high-frequency supply of the heating element increases, and scorching marks are easily formed on the underside of the object to be heated, and the effect of high-efficiency heating can be achieved when heating with a heater.

The partition plate of the high-frequency heating cooker according to the present invention includes a high-frequency heating element.

Using this high-frequency heating cooker, since the high-frequency heating element generates heat through high-frequency, it is possible to raise the overall temperature in the heating chamber in the preheating stage, and it is possible to heat the substrate placed on the partition plate from the lower side in the main heating stage. Heating.

The partition plate in the high-frequency heating cooker of the present invention includes a high-frequency shielding body.

According to this configuration, by making the partition plate include a high-frequency shielding material such as metal that does not pass high-frequency easily, the high-frequency supplied from the bottom is less likely to go around to the top, and the attenuation in the object to be heated can be suppressed to the maximum. water rate. And by this structure, it is possible to prevent the high frequency from directly impinging on the object to be heated, thereby preventing local overheating. In this way, the moisture of the object to be heated can be kept by steam heating, and it has the effect of making moist and delicious food.

The partition plate in the high-frequency heating cooker of the present invention is made of ceramic or heat-resistant resin material.

According to this high-frequency heating cooker, by using a ceramic material or a heat-resistant resin material as a high-frequency heating element, heat generated by the high-frequency heating element can be stored in the high-frequency heating element, thereby uniformly heating an object to be heated. And after the high-frequency heating is stopped, the heat from the high-frequency heating element and the latent heat of the steam can also be used to continue heating the object to be heated. A structure in which a high-frequency heating element film is formed on a substrate as a high-frequency heating element is also effective.

The partition plate in the high-frequency heating cooker of the present invention includes a metal plate.

According to this high-frequency heating cooker, when the object is heated by the high-frequency heating body, heating of the object by high frequency can be actively suppressed by constituting the partition plate with the metal plate or using the metal plate as the base.

The high-frequency heating cooker of the present invention includes a preheating device that raises the temperature of the entire heating chamber.

According to this configuration, since steam is supplied to the heating chamber after the temperature of the entire heating chamber is raised by the preheating device, it is possible to suppress condensation on the wall surface of the heating chamber and efficiently heat the object to be heated. And it does not increase the amount of steam and realizes steam heating and cooking efficiently.

The above-mentioned preheating device of the high-frequency heating cooker of the present invention includes an upper heater provided above the above-mentioned heating chamber.

According to this high-frequency heating cooker, the heater for preheating can also be used as the heater for cooking, so that the upper heater can be effectively used.

The above-mentioned preheating device in the high-frequency heating cooker of the present invention includes a high-frequency heating element arranged on the above-mentioned separator.

According to this high-frequency heating cooker, since the high-frequency heating element provided on the partition plate generates heat through high frequency, the temperature of the entire heating chamber can be efficiently raised in the preheating stage.

The steam delivery device in the high-frequency heating cooker of the present invention has a steam delivery path that guides the generated steam from the heating chamber to the heating outside and then reintroduces the steam into the heating chamber.

According to the high-frequency heating cooker of the present invention, since the steam delivery passage is provided outside the heating chamber, there will be no scale and attachments polluted by heated objects on the steam delivery passage, so that it can be kept clean.

The partition plate in the high-frequency heating cooker of the present invention is engaged by engaging members provided at a plurality of different height positions on the wall surface of the heating chamber.

According to this high-frequency heating cooker, the height of the partition in the heating chamber can be set arbitrarily according to the cooking object, so the strength of the steam heating force can be easily changed without temperature control.

The high-frequency heating cooker of the present invention includes one in which the above-mentioned steam generator is arranged along the wall surface on the back side of the bottom surface of the heating chamber.

In particular, since the steam generator is arranged on the bottom surface of the heating chamber, the entire heating chamber can be effectively used without sacrificing the space for cooking. When the steam generated on the lower side is guided to the outside of the heating chamber and then re-introduced from the upper part of the heating chamber, it is possible to choose to make the steam rise along the wall of the heating chamber. In addition, since water flows to the bottom of the heating chamber, water can be stably stored, and at the same time, water will not be accidentally spilled during the operation of taking out food, thereby improving operability. In addition, because the water flows to the bottom surface of the heating chamber, other electrical components and electronic components on the bottom surface of the heating chamber will not be damaged by water, and because the steam has the characteristic of rising from the bottom, even when the object to be heated When arranged on the bottom surface of the heating chamber, the effect of cooking with steam can also be realized. In addition, according to this structure, it is possible to uniformly heat the partition plate provided with the high-frequency heating element by the high frequency uniformly supplied from below, and to heat through the steam rising in the gap between the heating chamber and the partition plate and the heater, Heat cooking such as wrapping and grilling can be performed evenly.

The high-frequency heating cooker of the present invention is configured such that the steam supplied from the steam supply unit directly contacts the object to be heated.

According to this configuration, the object to be heated can be heated uniformly and efficiently by latent heat by bringing high-temperature steam into contact with it. Since the high-temperature steam directly contacts the object to be heated, the temperature of the object to be heated can be raised efficiently.

The high-frequency heating cooker of the present invention includes a high-frequency diffuser that diffuses high-frequency and supplies it to a heating chamber.

According to this structure, since there is a high-frequency diffusion device that diffuses high-frequency and supplies it to the heating chamber, local overheating can be prevented, and heating can be performed more uniformly from below. The temperature deviation makes the heating deviation smaller.

The high-frequency heating cooker of the present invention has a control unit that controls the high-frequency generating unit, the steam generating unit, and the preheating device, and the control unit performs preheating of the heating chamber by the heat generated by the preheating device in advance. The heating step is further controlled by the sequence of the main heating step of heating the object by applying at least one of high frequency from the high frequency generating unit and steam from the steam generating unit to the object to be heated.

According to this high-frequency heating cooker, by performing the main heating step of supplying steam after the preheating step, the steam can be supplied after the entire heating chamber becomes high temperature, and condensation of the supplied steam on the wall surface of the heating chamber can be greatly reduced. , thereby forming a structure that is easy to clean and convenient to use.

A high-frequency heating cooker according to the present invention includes a control unit for controlling the high-frequency generating unit, the steam generating unit, and the preheating device. The control unit has an interrupt processing function for supplying steam from the steam generating unit to the heating chamber for a predetermined time during heating of the object to be heated.

According to this high-frequency heating cooker, since the steam is supplied when the object to be heated is heated, the latent heat that the steam has can be used to uniformly heat the inside of the object to be heated, and the grilled color of the object to be heated can be made uniform. When the heating chamber is heated above the steam temperature, the overall temperature in the heating chamber is lowered to cool the object to be heated.

The high-frequency heating cooker of the present invention has a steam supply switch that executes the above-mentioned interruption process at an arbitrary timing.

According to this high-frequency heating cooker, steam can be supplied into the heating chamber at any time during the heating cooking process, and a required amount of steam for heating cooking can be supplied within a necessary time by simple operation. This prevents uneven heating and enables even wrapping and grilling.

According to the high-frequency heating cooker of the present invention, the space in the heating chamber can be divided into the space above the partition and another space by the partition, thereby reducing the space in the heating chamber for heating cooking. Since steam is supplied to this narrowed space, the responsiveness to temperature changes during heating can be improved without increasing the heating capacity. In addition, since the preheating device raises the overall temperature of the heating chamber and then supplies steam to the heating chamber, condensation on the walls of the heating chamber, etc. can be suppressed, and the object to be heated can be heated uniformly and efficiently.

Description of drawings

Fig. 1 is a front view showing that the switch door of the high-frequency heating cooker according to the first embodiment of the present invention is in an open state;

Fig. 2 is the schematic diagram of section A-A among Fig. 1;

Fig. 3 is a control block diagram of the high-frequency heating cooker;

Fig. 4 is an explanatory diagram showing the basic principle of steam generation in the high-frequency heating cooker;

Fig. 5 is the exterior view of heating and adding parts, wherein Fig. 5 (a) is the perspective view of the upper side, and Fig. 5 (b) is the perspective view of the back side;

Fig. 6 (a) is a schematic exploded view of the steam generating part in the heating chamber, and Fig. 6 (b) is an assembly view;

Fig. 7 is the direction view of B direction in Fig. 1;

Figure 8 is a perspective view of the appearance of the tray;

Fig. 9 is a C-C sectional view of Fig. 8, wherein Fig. 9 (a) is an illustration of forming a convex portion, and Fig. 9 (b) is an illustration of a corrugated metal plate;

Fig. 10 is a schematic explanatory diagram showing an example of a state in which an object to be heated placed on a tray is heated by supplying high frequency and steam in the heating chamber;

Fig. 11 is an explanatory diagram showing an example of a heating characteristic curve when cooking with steam;

Figure 12 is a curve showing the temperature of the object to be heated as a function of time with or without preheating;

Fig. 13 is an explanatory diagram showing a heating characteristic curve when the temperature of the entire heating chamber is increased;

Fig. 14 is an explanatory diagram showing an example of a heating characteristic curve of grill cooking, Fig. 14(a) is a graph showing temperature change without steam supply, and Fig. 14(b) is a graph showing temperature change with steam supply;

Fig. 15 is an explanatory diagram showing an example of a heating characteristic curve of barbecue heating simultaneously using high-frequency heating;

Fig. 16 is a diagram showing other structural examples related to the heating method of the steam generating part, wherein: Fig. 16(a) shows an example of forming a heating member and an individual evaporating dish separately, and Fig. 16(b) shows heating with radiant heat Cutaway view of an example of an evaporating dish;

Fig. 17 is a schematic configuration diagram of an example in which the supply direction of the steam is changed when the steam of the steam generating part is supplied into the heating chamber, wherein Fig. 17(a) is a side view, and Fig. 17(b) is a plan view;

Fig. 18 is a schematic side view showing a configuration example in which a steam pipe is installed in a heating chamber;

Fig. 19 is a schematic cross-sectional view of the high-frequency heating device according to the second embodiment of the present invention;

Fig. 20 is a schematic cross-sectional view of the high-frequency heating device in Fig. 19;

Fig. 21 is an enlarged cross-sectional view of main parts showing a modified example of the high-frequency heating device according to the second embodiment of the present invention;

Fig. 22 is an enlarged cross-sectional view of main parts showing a modified example of the high-frequency heating device according to the second embodiment of the present invention;

Fig. 23 is an enlarged cross-sectional view of main parts showing a modified example of the high-frequency heating device according to the second embodiment of the present invention;

Fig. 24 is an enlarged cross-sectional view of main parts showing a modified example of the high-frequency heating device according to the second embodiment of the present invention.

Detailed ways

Preferred embodiments of the high-frequency heating device of the present invention will be described in detail below with reference to the accompanying drawings.

first embodiment

Fig. 1 is a front view showing a state in which a door of a high-frequency heating cooker according to a first embodiment of the present invention is opened. Fig. 2 is a schematic arrow view of section A-A in Fig. 1, and Fig. 3 is a control block diagram of the high-frequency heating cooker.

This high-frequency heating cooker 100 is a heating cooker for heating an object to be heated by supplying at least one of high frequency (high frequency) and steam to a heating chamber 11 in which an object to be heated is placed. As shown in FIG. 1 , it is characterized in that the space in the heating chamber 11 is divided into an upper space and a lower space by a tray 21 as a partition. This cooker 100 also has: a high-frequency generating part 13 composed of a magnetron generating high-frequency, a steam generating part 15 for generating steam in the heating chamber 11, and an upper heating device as a preheating device arranged above the heating chamber 11. The heater 17 and the tray 21 arranged above the bottom surface of the heating chamber 11 at a predetermined distance from the bottom surface and on which the object to be heated is placed.

The high frequency from the high frequency generator 13 is diffused throughout the heating chamber 11 by the rotating high frequency stirring blade 23 . Furthermore, the tray 21 is supported by engaging portions 25 formed on the side wall surfaces 11a, 11b of the heating chamber 11, and functions as a partition. Multi-stage engaging portions 25 are provided at multiple height positions of the heating chamber 11 so as to support the tray 21 at multiple different height positions. By fixing the tray 21 to the fixing part 25, the space of the heating chamber 11 is divided into upper and lower parts. On the other hand, the steam generator 15 is configured to supply water from a water supply container 27 provided on the side surface of the heating chamber 11 .

The steam generating part 15 is provided on at least one corner on the back side of the bottom surface of the heating chamber 11 . In this embodiment, a configuration example in which two steam generating parts are arranged at two inner corners is shown, but one configuration may be arranged at one side. In addition, as shown in FIG. 2 , a steam conduit 29 is provided as a steam delivery passage, which communicates with the upper space above the steam generating part 15 and the heating chamber 11, that is, the space above the heating chamber 11, which is divided into two parts by the tray 21. The steam conduit 29 as a steam delivery device sends the steam generated by the steam generating part 15 to the space above the tray 21 in the heating chamber. Temperature detectors 31 such as a thermistor and an infrared detector are installed on the deep side of the heating chamber 11 to measure the temperature of the heating chamber 11.

In addition, as shown in FIG. 3 , in the high-frequency heating cooker 100 of the present invention, it is also possible to install a circulation pump 33 which stirs the air in the heating chamber 11 to circulate it, and a circulation pump 33 which circulates the air in the heating chamber 11. The heated convection heater 35 constitutes the indoor gas heating section 37 . The operations of these components are performed in accordance with control instructions from the control unit 39 including a microprocessor.

In addition, on the operation panel 91 provided on the opening and closing door 41, various operation switches such as a start switch 93 for instructing heating start and an automatic cooking switch 97 for selecting a pre-prepared cooking program are provided.

The control unit 39 is powered by the power supply unit 40 connected to the civil power supply, and needs to control the distribution of electric power to each component in order not to exceed the allowable power value of the heating electric power of the high-frequency generating unit 13, upper heater 17, steam generating unit 15, etc.

The heating chamber 11 is formed in the inside of the box-shaped main casing 10 opened at the front, and an opening and closing door 41 with a light-transmitting window 41a is installed on the front of the main casing 10 in a form that can be opened and closed freely, and the opening and closing door 41 can be opened and closed. Close the heated object outlet of the heating chamber 11.

The high-frequency generator 13 is disposed in the space below the heating chamber 11, and is provided as a high-frequency diffusion device such as a stirrer blade 23 and a rotating antenna at a position where the high-frequency generated by the magnetron is received substantially in the center of the bottom surface of the heating chamber 11. . The high-frequency generator 13 and the stirrer blade 23 are not limited to be disposed on the bottom of the heating chamber 11 , and may also be disposed on other sides of the heating chamber 11 . The high-frequency diffuser can be driven by rotation, or a combined high-frequency reflector can be used.

As shown in FIG. 2 , the steam generator 15 includes a heating member 45 having a water storage tank 45 a for generating steam by heating, and a steam channel 47 covering the water storage tank 45 a of the heating member 45 and introducing the generated steam into the steam conduit 29 .

Here, the basic principle of steam generation in the high-frequency heating cooker 100 will be briefly described.

Fig. 4 is an explanatory diagram showing the basic principle of steam generation in the high-frequency heating cooker.

Here, the water remaining in the water supply container 27 is sent to the water supply pipe 51 through the check valve 49 . The intermediate pipe 51a of the water supply pipe 51 receives the heat generated by the sheath heater 53 of the heating member 45, and heats the water in the intermediate pipe 51a. When a part of the heated water turns into boiling water, bubbles are generated due to boiling, and the volume expands rapidly. At this time, the check valve 49 on the water supply container 27 side of the water supply pipe 51 is closed to prevent backflow to the water supply container 27 side. Therefore, the volume-expanded water is intermittently supplied to the discharge-side piping 55 . Thereby, the water level in the discharge side pipe 55 is raised, excess steam is discharged from the discharge air hole formed on the upper part, and heated water is intermittently supplied to the water storage tank 45 a of the heating member 45 from the discharge port 59 .

In addition, the water storage tank 45a is also heated by the sheath heater 53, and the dripped heating water evaporates here, and the steam passage 47 is filled. Filled vapor then enters from above the heating chamber 11 through the vapor conduit 29 . That is, by utilizing heat generated by the sheath heater 53 in the heating member 45, heated water is supplied to the water storage tank 45a, and the water storage tank 45a is heated at the same time.

A specific configuration example for realizing the above steam generation will be described in detail below.

FIG. 5 shows an external perspective view of the heating component. Fig. 5(a) is the top side, and Fig. 5(b) is the back side.

The heating member 45 is an aluminum die-cast molded product having light weight and high thermal conductivity. A U-shaped sheath heater (evaporating pan heater) 53 is buried in the heating member 45 inside the main body 61, and a water storage tank 45a is formed on the upper side along the sheath heater 53, and a covering is formed on the lower side. The heating part 45b of the intermediate pipe 51a of the water supply pipe 51. The water storage tank 45a and the heating part 45b are integrally formed by die-casting, and since there is no connecting surface or the like, the heat generated by the sheath heater 53 can be efficiently conducted.

A thermistor (evaporating dish temperature detector) 65 for detecting temperature is inserted into the placement hole 63 located on the lower side of the water storage tank 45a to measure the temperature near the sheath heater 53 of the main body 61 . An opening hole 67 is formed at one end of the water storage tank 45a, and the water from the discharge port 59 is supplied to the water storage tank 45a. In addition, the shapes and installation positions of the sheath heater 53 and the heating unit 45b can be appropriately changed according to the required heating amount and the installation space in the cabinet of the high-frequency heating cooker 100 . In addition, it is also possible to replace the above-mentioned sheath heater 53 with other types of heaters such as wire heaters and ceramic heaters.

FIG. 6( a ) shows a schematic exploded view of the steam generating unit 15 inside the heating chamber, and FIG. 6( b ) shows its installation view.

On the lower side of the stepped portion 69 protruding from the bottom surface of the heating chamber 11, the heating member 45 is provided with a water storage tank 45a directed upward, and a cover covering the water storage tank 45a is detachably attached above the water storage tank 45a. 71 and the steam passage 47 of a hollow structure connected to the opening hole 71a of the cover 71 and opening toward the steam discharge port 73 formed inside the heating chamber 11. The steam introduced into the steam discharge port 73 enters the upper space of the heating chamber 11 through the steam conduit 29 as shown in FIG. 2 . In addition, when the steam passage 47 is removed, steam is supplied from the bottom side of the heating chamber 11 .

The surface of the water storage tank 45a of the heating element 45 is treated with a hydrophilic material such as silicic acid (SiO 2 ), which does not make the water spherical, ensures a larger contact area, and generates more steam easily. In addition, treating the surfaces of the cover body 71 and the vapor channel 47 with hydrophobic materials such as fluorine can suppress the adhesion of pollutants such as evaporation residues during evaporation. In addition, even if pollutants adhere temporarily, they can be easily removed. For example, in the process of steam generation, the calcium, magnesium and chloride in the water are concentrated and deposited on the bottom of the water storage tank 45a. As long as the water storage tank 45a is wiped with a cloth or the like, these dirts can be removed cleanly. In addition, since the steam passage 47 is detachable, cleaning work can be easily performed.

Here, in order to explain the water supply path from the water supply container 27 shown in FIG. 1 to the heating member 45 , FIG. 7 shows a view from the arrow B in FIG. 1 . Similar to FIG. 4 which explained the principle of steam generation above, the water in the water supply container 27 enters the water supply pipe 51 through the check valve 49, and is supplied to the discharge side pipe 55 after being heated by the heating part 45b of the heating member 45. Then, the heated water is intermittently supplied from the discharge port 59 to the water storage tank of the heating member 45 . In addition, as the water supply pipe 51, it is preferable to use a material with high thermal conductivity such as a copper pipe, especially around the heating portion 45 that receives heat transfer.

Next, the tray 21 shown in FIG. 1 will be described. FIG. 8 shows an external view of the tray, and FIG. 9 shows a C-C sectional view of FIG. 8 .

The tray 21 can be easily and freely disassembled at multiple height positions in the heating chamber 11 . It includes a metal plate 75 as the surface of the object to be heated, a high-frequency heating element 77 disposed opposite to or in contact with the metal plate 75, and a high-frequency heating element 77 fixed on the metal plate 75 and fixed to the side of the heating chamber 11. Part 25 (see FIG. 1 ) is fixed with a fixing member 79 .

The metal plate 75 is made of aluminized steel plate, and the surface is provided with wavy concave-convex parts, and the concave-convex parts have a depth capable of storing water. Fluorine, which has a high anti-pollution effect, is applied to the front side of the aluminum-plated steel sheet, and black heat-resistant coating, which has a high heat-absorbing effect, is applied to the inner side.

On the surface of the high-frequency heating element 77 opposite to the side of the metal plate 75, a high-frequency absorbing film 81 composed of a dielectric material such as nitride and boride that absorbs high frequency and generates heat is tightly mounted on the substrate 83. The base body 83 is made of ceramic material or heat-resistant resin, preferably a material with high heat storage effect.

The fixing member 79 is composed of insulators provided on both sides along the insertion direction of the heating chamber of the tray 21, and the gap formed with the heating chamber 11 prevents sparks from being generated during high-frequency heating. If the gap is increased, when the steam in the space below the heating chamber is guided to the space above, the steam can be efficiently guided to the space above through the inner wall of the heating chamber.

In addition, as shown in FIG. 9(a) and FIG. 9(b), the distance between the high-frequency absorbing film 81 and the metal plate 75 can be changed by forming a convex portion 75a on the metal plate 75 or forming a concave-convex waveform on the metal plate 75 itself. Therefore, the intensity of the electric field on the high-frequency absorbing film 81 becomes higher, and the effect of increasing the heat generation on the high-frequency absorbing film 81 is obtained. In addition, as the high-frequency heating element 77, in addition to the configuration in which the high-frequency absorbing film 81 is provided on the inner surface, a dielectric such as ceramics may be used to cause the high-frequency absorber itself to generate high-frequency heat. Alternatively, ferrite rubber or the like and ceramic rubber in which ceramic powder is mixed into rubber may be used.

Though use metal aluminized steel plate as metal plate 75, if the performance of surface reflection high frequency is good, then also can utilize the high frequency reflective layer that is formed by metal electroplating and metal vapor deposition etc. to be set on the base material of ceramic material, Various plated steel sheets such as stainless steel, aluminum and aluminum alloys, galvanized steel sheets, galvalume-plated steel sheets, and copper-plated steel sheets, cold-rolled rolled steel sheets, metal cladding materials, etc. may be used instead of the metal plate 75 . In addition, although nitrides, borides, and the like are used as the high-frequency absorbing film 81, metal oxides such as tin oxide and indium oxide, composite oxides, and other dielectric materials may also be used. In addition, the tray 21 is not limited to the above structure, and may be a flat plate that can basically receive dew condensation water accompanying the object M to be heated.

Next, the operation of the high-frequency heating cooker 100 of the present invention will be described.

For example, in order to perform grill heating simultaneously with steam heating, first, the tray 21 is installed in the heating chamber 11 , and the object M to be heated is placed on the tray 21 . Then close the opening and closing door 41 of the high-frequency heating cooker 100, operate the various switches located on the operation panel 91 (see Figure 3), after the desired heating mode of the setting, press the start switch 93. Also, when heating in the automatic cooking mode, the cooking program stored in advance in the storage unit 95 is selected by pressing the automatic cooking switch 97 or the like, and then the start switch 93 is pressed.

Here, FIG. 10 schematically shows an example of a state where an object to be heated placed on a tray is subjected to heat treatment by supplying high frequency and steam into the heating chamber.

To describe this example, first, the tray 21 is attached to a position above the heating chamber 11 , and the object to be heated M is placed on the tray 21 . Then, the object M on the tray 21 is heated by radiant heat Q1 by heating the upper heater 17 .

In addition, the high frequency generator 13 generates high frequency, and the high frequency is diffused and emitted to the heating chamber 11 by the rotation of the stirrer blade 23 . As a result, the high-frequency absorbing film 81 of the tray 21 generates heat to heat the high-frequency heating element 77 , and this heat Q2 propagates to the object to be heated through the metal plate 75 . Part Q3 of the generated high frequency passes through the gap between the inner wall surface of the heating chamber 11 and the tray 21 and enters the space above the tray 21 to perform high frequency heating on the object to be heated. Among them, according to different heating objects, sometimes it is not necessary to carry out too strong high-frequency heating on the heated object M, so the heat quantity of Q3 should be set smaller. That is to say, although the temperature of the object to be heated M rises with the heat generation of the high-frequency heating element 77, the high frequency used for heating the high-frequency heating element 77 is shielded by the metal plate 75 of the tray 21, so it cannot be supplied to the high-frequency heating element 77. On the heated object M. In addition, in addition to supplying the high frequency from the bottom surface of the heating chamber, it is also possible to shield the high frequency when the power supply interface is arranged on the side surface of the heating chamber below the tray 21 .

In addition, the steam from the steam generating part 15 enters the upper space 87 of the heating chamber from the steam outlet 85 through the steam conduit 29, and the steam heat Q4 contacts the object M to heat the object M through heat exchange.

The object M to be heated can be efficiently heat-treated by the above-mentioned radiant heat Q1, heat Q2 from the high-frequency heating element 77, part of high-frequency heat Q3, and steam heat Q4. In addition, by appropriately selecting and combining each of the heat sources Q1 to Q4 and heating them sequentially, it is possible to perform optimum heat treatment according to the heating purpose of the object to be heated. In addition, the high-frequency shielding effect of the metal plate 75 of the tray 21 can be used to suppress high-frequency overheating when steaming the object to be heated, thereby performing true steaming cooking.

In addition, by heating the convection heater of the indoor air heating unit (not shown in the figure), the object M to be heated can be further uniformly heated at a high temperature.

In this way, since the volume of the heating chamber used for heat cooking is divided by the tray 21 and becomes smaller, the steam can be quickly filled with the heating chamber, and the temperature in the upper space of the heating chamber 11 is also rapidly increased by the supply of steam. to a temperature close to vapor (eg 100°C). Therefore, the state where steam cooking can be performed in the heating chamber 11 is formed immediately after the high-frequency heating cooker 100 starts heating, thereby greatly shortening the time for heating and cooking. In addition, since the temperature of the heating chamber 11 is raised by the upper heater 17 when steam is generated, dew condensation in the heating chamber 11 can be prevented. In addition, by changing the height of the tray 21 in the heating chamber 11, the actual steam temperature can be adjusted, so that the heating power of the steam can be simply changed without temperature control.

In addition, the control unit 39 feedback-controls the steam generation amount and the heater heating amount based on the temperature detected by the thermistor 65 of the heating member 45 and the temperature detector 31 that detects the temperature in the heating chamber, and accurately sets the temperature and temperature in the heating chamber 11. The amount of steam makes it easy to cook eggs where temperature control is difficult.

In addition, since the steam from the steam generator 15 is supplied to the upper space of the heating chamber 11 through the steam conduit 29 disposed outside the heating chamber 11, the cooked food will not adhere to the piping components such as the steam conduit 29 and make them dirty. Thereby constituting the structure which is easy to clean.

In addition, because the high-frequency heating cooker 100 of this embodiment is equipped with two steam generators 15 on the corner of the bottom surface of the heating chamber 11, the amount of steam generated can be changed according to the heating content of the object to be heated. It is divided into the case where a large amount of steam is needed and the case where a small amount is enough, so that the characteristic curve of steam supply can be set arbitrarily to achieve the required steam supply.

Here, taking the heating treatment of the above-mentioned high-frequency heating cooker 100 as an example, the remarkable effects of the present invention manifested by each heating treatment will be described in detail in sequence.

An example of a heating profile for steam cooking is shown in FIG. 11 . According to this heating characteristic curve, at the initial stage of heating, the tray is placed in the heating chamber 11, and power is supplied to the upper heater 17 for a predetermined time to perform preheating. After the preheating finishes, stop supplying power to the upper heater 17, and turn to the evaporating dish heater, that is, the armored heater 53 to supply power. Thereby, steam is supplied to the heating chamber.

The change of the temperature in the box with such a heating characteristic curve is that when the object to be heated is placed on the tray after the door is opened after preheating, the temperature in the box drops once, and when the door is closed, the temperature in the box decreases. It rises rapidly and quickly reaches the normal state of around 100°C, which is the steam supply temperature. Since the condensation of the generated vapor is almost always generated on the surface of the object to be heated, less heat is absorbed on the wall surface of the heating chamber 11 or the like. In addition, dew condensation water remaining in the tray 21 can be easily removed by removing the tray.

In addition, when power is supplied to the evaporating dish heater without preheating, the rise in temperature in the chamber becomes slow, which becomes the main factor for the long cooking time. And because the temperature in the box decreases, the steam generated tends to condense on each surface of the heating chamber 11, and the condensed water will remain on the bottom surface of the heating chamber. In this case, many troublesome operations are required to remove the dew condensation water on the bottom surface and side surfaces of the heating chamber.

In addition, when heating an object to be heated such as leafy vegetables, the green color of the leafy vegetables will not be bright without preheating, and when preheating is performed, the overall temperature in the heating chamber becomes above 100°C, because in the concentration Short-term high-efficiency steam heating is performed in a high steam environment, so the processed leafy vegetables can be brightly colored.

FIG. 12 shows a graph showing the change in temperature of the object with time in the presence or absence of preheating. During the above-mentioned preheating, the temperature of the object to be heated rises rapidly, and can quickly reach the target temperature and become a stable state. In addition, when preheating is not performed, the temperature of the object to be heated becomes slow, and the time to reach the target temperature is longer than when preheating is performed.

In addition, when it is intended to further increase the overall temperature in the heating chamber, as shown in Figure 13, power can be supplied alternately to the upper heater and the evaporating pan heater, preferably the electric power required by the upper heating heater and the electric power required by the evaporating pan heater The sum is set to the maximum value within the range of the allowable electric power value of the high-frequency heating cooker 100, thereby maximizing the heating effect. Such heating properties are most suitable for heating eg root vegetables. In addition, at this time, even if preheating is not performed, the temperature in the heating chamber will rise relatively quickly, but it is better to preheat in order to shorten the cooking time.

An example of grill cooking will be described below.

An example of a heating characteristic curve for grill cooking is shown in FIG. 14 . In grill cooking, the object to be heated M is placed on the tray 21, and the object M is heated by the heat generated by the upper heater 17 so that the object M is scorched. At this time, as shown in Figure 14(a), the temperature of the heated object M after the main heating starts after preheating is as follows: the upper surface of the heated object M rises rapidly after being heated, while the inside of the heated object M heats up slowly. , the temperature difference between the surface and the interior tends to expand at the initial stage of heating. That is to say, the upper surface of the object to be heated M close to the upper heater 17 heats up quickly after being heated, but due to the heat capacity of the object M to be heated, it takes time for the heat from the surface to transfer to the inside, so the internal temperature of the object M to be heated rate of ascent becomes lower.

As shown in Fig. 14(b), as the steam is supplied into the heating chamber during the main heating, the steam condenses on the surface of the object M to be heated which is lower in temperature than the supplied steam, and the condensed water evaporates. By absorbing the heat of vaporization, the surface temperature of the object M is temporarily lowered (ΔT1). In addition, inside the heated object M, the heat capacity is about twice that of the air in the heating chamber, and the high-temperature steam with a higher temperature than the heated object M contacts the heated object M, so that the heat of the steam is higher in the heated object M. Efficient transfer, thereby accelerating the temperature rise of the heated object M (ΔT2). Therefore, the temperature difference between the surface and the inside of the object M to be heated can be suppressed to be small. In addition, by supplying steam at a temperature lower than that of the heating chamber into the heating chamber, the temperature of the surface layer in contact with the air of the object M to be heated can be lowered, so that over-burning of the surface can be suppressed, and insufficient internal heating can be alleviated.

In the heating method of the above-mentioned barbecue cooking, high-frequency heating can also be used for heating at the same time. An example of a heating characteristic curve for grill heating by simultaneous use of high-frequency heating is shown in FIG. 15 .

In the barbecue cooking at this time, the high-frequency heating element 77 is provided as a tray (see FIG. 9 ), and the tray 21 is preheated by high-frequency heating. In the main heating after the preheating, the heating pan is heated by supplying power only to the high-frequency generating part, and the bottom surface side of the object M is heated. Next, the power supply to the high-frequency generating part is stopped, and the power supply to the upper heater 17 is started to heat the upper surface of the object M to be heated. Then, during heating by the upper heater 17, power is supplied to the evaporating pan heater of the steam generating part for a predetermined time, and steam is supplied to the heating chamber. And when supplying power to the evaporating dish heater, the power supply to the upper heater 17 should be stopped, so that the sum of the electric power does not exceed the allowable electric power value of the high-frequency heating cooker 100. Furthermore, the supply of steam may be repeated a plurality of times, or the supply of steam may be continuously performed after a predetermined time elapses from the start of main heating.

Here, steam is supplied during heating, if it is supplied in the first half of heating cooking, it will have the effect of imparting moisture to the object to be heated to make it moist and soft; if it is supplied in the second half of heating cooking, it will have the effect of making the object to be heated Good heating inside the M and uniform coloring of the grill. Even if there are irregularities on the surface of the object to be heated M, since steam can enter the unevenness, it is possible to prevent local variations in the degree of grilling on the object M to be heated, and to make the grilling state uniform. In the case of heating with the upper heater 17, the amount of heating to the portion affected by the unevenness becomes small, but such unevenness does not occur when steam heating is used at the same time. In addition, the uneven heating of the heating chamber by the upper heater 17 can be prevented in advance, that is, the heating of the object located in the center of the heating chamber caused by uneven heating with a large amount of heating in the center of the heating chamber and a small amount of heating at the corners of the heating chamber. Scorched due to overheating, and the object to be heated on the corner of the heating chamber is sandwiched due to insufficient heating.

Such a heating characteristic mode can be used, for example, for heating and cooking of bone-in meat, so that the heating around the bone is good, and the surface can be restrained from scorching and the interior can be fully heated, thereby making the heated object have a puffy and soft texture.

The heating modes described above can also be pre-stored as cooking programs in the storage unit 95 connected to the control unit 39 shown in FIG. At this time, it is also possible to use the heating temperature detector 31 to detect the temperature of the heated object in the heating chamber, compare the temperature of the heated object, and use the timer 99 to measure the heating time and other elapsed time to set the control timing of the above-mentioned parts. The time of steam generation is except automatically set according to the preset cooking program, also can adopt steam supply switch 101 to be set on the operation panel 91, start to supply steam from pressing this steam supply switch 101 arbitrary time. Therefore, by opening and closing the light-transmitting window 41a of the door 41, confirming the heating and cooking process of the object to be heated M and pressing the steam supply switch 101 at the desired time, steam can be supplied at an appropriate time, thereby ensuring that the cooking process will not be caused. fail, and improve ease of use.

The heating time and heating amount by the upper heater, the evaporating pan heater and the high-frequency generating unit described above vary with the type, shape, weight and cooking method of the object to be heated M, and should be appropriately set according to various conditions.

Another configuration example of the high-frequency heating cooker 100 described above will be described below.

FIG. 16 shows another configuration example corresponding to the heating method of the steam generating part. Fig. 16(a) shows an example in which the heating member and the evaporating dish are individually formed, and Fig. 16(b) shows an example in which the evaporating dish is heated by radiant heat. In the structure of FIG. 16( a ), the heating member 107 is arranged in contact with the lower side of the evaporating dish 105 , and the evaporating dish is heated by heating the heating member with a heating device such as a sheath heater 109 . According to this configuration, since the evaporating dish 105 is connected to the bottom surface of the heating chamber, cleaning of the dish surface is easy.

In the structure shown in FIG. 16(b), a tube heater 111 heated by radiant heat is provided on the lower side of the evaporating dish 105, and a reflector 113 is provided around the tube heater 111. By making the tube heater 111 The heat is directly or reflected by the reflection plate 113 to heat the evaporating dish 105 . According to this configuration, the evaporating dish can be heated at a lower cost.

Fig. 17 is a schematic configuration diagram showing an example in which the steam supply direction changes when steam from the steam generating unit is supplied into the heating chamber, wherein (a) is a side view and (b) is a plan view.

As shown in FIG. 17( a ), the steam generated in the steam generating unit 15 is sent to the object M in the heating chamber through the steam conduit 29 . That is, the installation angle of the end side 29 a of the steam pipe 29 toward the heating chamber 11 side is set so that the pipe supplies steam from obliquely above to the mounting surface of the tray 21 parallel to the bottom surface of the heating chamber 11 . In addition, as shown in FIG. 17(b), when two steam pipes 29 are used, the terminal side 29a of the steam pipe 29 is arranged toward the center of the heating chamber 11 to supply steam to the object M in the heating chamber 11 respectively. In any case, the object to be heated M should be placed on the approximate center of the tray 21 .

According to this structure, since steam is supplied to the object M to be heated, the heat of the steam can be concentratedly added to the object M to be heated, and the object M can be heated more rapidly. Add water. In addition, since the transfer of heat from the steam to the wall surface of the heating chamber 11 and the like is reduced, the heating efficiency is improved. Therefore, the cooking performance of the high-frequency heating cooker can be improved, and the cooking time can be shortened. In addition, since the steam does not directly contact the wall surface of the heating chamber, dew condensation on the wall surface can be reduced.

Fig. 18 is a schematic side view showing a structural example in which a steam pipe is provided in a heating chamber. In this case, the steam pipe is treated with surface treatment such as fluorine coating to easily remove scale and cooking deposits, and antibacterial treatment to prevent bacterial growth. According to this configuration, steam can be introduced into the upper space of the heating chamber with a simple structure, and contamination can be easily removed by cleaning, thereby improving usability.

(second embodiment)

19 and 20 are schematic cross-sectional views of the high-frequency heating cooking device according to the second embodiment of the present invention.

As shown in Figure 19 and Figure 20, the high-frequency heating cooking device includes: a heating chamber 111 for placing the object to be heated, and an upper heater 117, which is used as a heating device for heating the heater arranged on the upper part of the heating chamber; The high-frequency generating part 113 that is used to generate high-frequency and carry out high-frequency heating on the bottom surface of the deep chamber, along the deep part of the bottom surface of the heating chamber, that is, the steam generating part 115 arranged on the back wall surface, is provided with a high-frequency heating element 177 on the inner surface and Partition plate 117 as a tray on which objects to be heated are placed. The high frequency emitted from the high frequency generator 113 is transmitted into the heating chamber 111 from below. The tray 121 is placed on rails (not shown) provided at the side of the heating chamber for use.

As shown in FIG. 20 , the steam generator 115 is provided on the bottom surface of the heating chamber along the wall surface on the back surface. A protruding portion 112 is formed at the center of the back surface on the heating inner wall 111, whereby a gap S is formed between the heating inner wall 111 and the partition plate. Here, as shown in FIG. 19 , the steam generated from the steam generator 115 rises through the gap S between the inner wall 111 of the heating chamber and the partition 121 , and high-concentration steam remains between the partition 121 and the upper heater 117 . The high-concentration steam surrounds the object to be heated on the partition 121. During high-frequency heating, it passes through the high-frequency heating element 177 inside the partition 121 and heats the high-frequency heating element evenly with the high frequency uniformly supplied from below. 177, you can get uniform grill marks. In addition, the retained high-concentration steam is heated with 100°C heat, so that the heated object is uniformly heated and the moisture is uniformly preserved, thereby suppressing the water reduction rate to a minimum. In addition, when the heater is heated, the heat of the heater makes the steam into a superheated state, and it can also achieve more uniform enveloping heating, and at the same time, the steam can fully surround the heated object, and the oxidation of oil can be suppressed by forming an oxygen-free state. , and make mildly salty foods by removing particles of salt.

High-frequency and steam heating are performed when a ceramic partition 121 with a high-frequency heating element (high-frequency absorber) 177 composed of nitride or boride is used as the partition 121 and salted fish food is used as the object to be heated. , and then use the upper heater 117 and steam to heat the upper part of the heating chamber, whereby the inside of the salted fish is heated by high frequency, the surface and the inside are all scorched, and the water reduction rate is suppressed to a minimum due to the heating of the steam. Minimal range, which removes pungent salty tastes by turning the steam into a superheated state. Thus, mild and salty food can be made.

Regarding the arrangement and composition of the partition plate 121, in order to divide the heating chamber into an upper portion and a lower portion, by setting the outer shape of the partition plate 121 to leave a small gap between the side wall surface of the heating chamber and the door closing the heating chamber, Can supply high-concentration steam to the object to be heated. In addition, since the high frequency supplied from below seldom goes around the upper part of the partition plate 121, a large amount of high frequency is supplied to the high frequency heating element, which has the effect of making it easier to form scorching marks on the underside of the object to be heated.

As the heating means, hot air may be used other than the tube heater of the upper heater 117, the sheath heater, or the like. As the partition plate 121, in addition to the partition plate 121 on which the object to be heated is placed with the high-frequency heating element 177 therein, the tray itself may be formed of high-frequency heating ceramics.

In addition, in the above-mentioned heating device, a stirrer blade may be provided on the bottom surface as a high-frequency diffusion device. Such a heating device generates high-frequency heating on the bottom surface of the heating chamber. Since the blades of the agitator uniformly irradiate the object to be heated with the high frequency emitted from the high frequency generator 113, the high frequency diffusion means for diffusing the high frequency and sending it to the heating chamber is effective. With this configuration, the high frequency can be more uniformly supplied from below into the heating chamber, and the object to be heated can be heated more uniformly.

In addition, as the separator 121, a metal that can shield high frequency can be used instead of a ceramic material, so that the amount of high frequency supplied from below to the top is less, and while the water reduction rate of the object to be heated is suppressed to the greatest extent, the steam Further improve the simmering effect, so that the cooking can be performed while maintaining the original taste of the heated object.

In this way, while the partition plate provided with the high-frequency heating element is uniformly heated by the high-frequency uniformly supplied from below, heat cooking can be carried out by uniformly wrapping with the steam and the heater.

In addition, according to the above-mentioned second embodiment, the gap S is formed by forming a protrusion 112 on the back side of the heating inner wall 111, but as a modified example, as shown in FIG. A concave portion 113 is formed on the side, and two gaps S0 are formed between the partition plate 121 and the inner wall of the heating chamber, and the steam is guided to the upper space from two places.

In addition, as shown in FIG. 22, the through-holes S1 may be formed in the four corners of the partition itself, not on the heating inner wall 211 side. Also with this configuration, the steam generated by the steam generating unit can be guided to the upper space through the through hole S1. In addition, an air supply port may be provided in the lower space to supply external air. Therefore, the outside air makes good contact with the steam in the lower space, lowers the temperature of the steam, and is supplied to the upper space through the through hole S1. At this time, the steam temperature can be adjusted by the inflow of external air, so as to achieve the purpose of adjusting the steam temperature, and can realize low-temperature steam heating below 85°C, which is effective for egg cooking and the like.

In addition, as shown in FIGS. 23 and 24 , a plurality of through holes S2 may be arranged along the periphery of the partition plate 321 . At this time, since steam is supplied to the upper space at a position separated from the heating inner wall 311, dew condensation on the heating inner wall can be prevented.

The high-frequency heating cooker according to the present invention has a partition board, which places the object to be heated while being separated from the bottom surface of the heating chamber by a predetermined gap, and is detachably arranged above the bottom surface to divide the partition plate. The indoor space is heated, so the steam generated by the steam generating part is efficiently supplied to the space above the partition. Thereby, a high-frequency heating device capable of effectively performing steam cooking and easy to operate is provided, which is applicable to various steam cooking. In addition, since dew condensation can be prevented and it is easy to use, it is effective as a good high-frequency heating device that does not require maintenance.

Claims (1)

1, a kind of thermatron is used for heating and wants heated article, comprising:

The high-frequency heating part;

Be used to hold the heating clamber of wanting heated article;

The steam supply unit is used for infeeding steam, and act as at least a being fed in the heating clamber in high frequency and the steam;

Dividing plate, this spacer function are will heated article placed thereon, and are arranged to and can upwards dismantle, and separate predetermined space with the bottom surface of heating clamber, cut apart the space in the heating clamber thus;

Wherein, steam supplies in the superjacent air space of cutting apart on the dividing plate,

Steam delivery device has from heating clamber inside to the heating clamber outside derives the steam that produced, steam is imported to once more steam transport path in the heating clamber thus.

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