WO2004091260A1

WO2004091260A1 - High frequency heating device

Info

Publication number: WO2004091260A1
Application number: PCT/JP2004/004851
Authority: WO
Inventors: Takeshi Takizaki; Tomotaka Nobue; Kenji Yasui; Kazuho Sakamoto; Makoto Mihara; Masato Matsuda
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2003-04-02
Filing date: 2004-04-02
Publication date: 2004-10-21

Abstract

A heating device constructed with due consideration given to movable arrangement for heating electrodes, having freedom for installation space and having high reliability. A plurality of substantially U-shaped support bars (14a, 14b) holding a movable electrode (12) have their center of rotation located on the side wall of a heating chamber (10) and are constructed for rotation and lifting/lowering while the lower sides of the substantially U-shaped support bars (14a, 14b) are keeping parallelism with a fixed electrode (13). Therefore, a movable device can be installed on the side wall of the heating chamber and the heating device in its entirety does not have to be increased in height. Further, since the movable electrode is held by the plurality of substantially U-shaped support bars, its parallelism with the fixed electrode can be reliably kept. It is possible to provide a heating device having good heating efficiency and superior performance, and capable of using both dielectric heating and microwave heating.

Description

Description High frequency heating equipment <Technical field>

The present invention relates to a high-frequency heating device. Background technology>

In recent years, dielectric heating methods using high frequency have been widely used for heating and thawing foods. The dielectric heating method is a method in which a high-frequency electric field is applied to a dielectric material to be heated to generate heat from the inside, thereby heating the dielectric material. When an electric field is applied to the dielectric, polarization occurs due to the movement of a charged substance such as an electron zion inside the dielectric, and positive and negative polar dipoles try to align in the direction of the electric field. By applying a high-frequency AC electric field whose polarity is switched millions of times per second, friction is generated by the intense motion of the dipole, which tries to follow the reversal of the electric field. This heat is used.

As the dielectric heating method using high-frequency power, a so-called HF heating method using a high frequency band of about 4 MHz to 80 MHz and a microwave band of 2.45 GHz or higher are mainly used. The microwave band and the above-mentioned high-frequency band are also high-frequency bands using the so-called microwave heating method, but according to the usual practice, here the high-frequency band of about 4 MHz to 8 OMHz is used as the HF band. The high-frequency power supply in the band is called the HF power supply, and the high-frequency voltage in this band is called the HF voltage.

Of these, the microwave heating method uses microwaves generated using a magnetron to guide the food into a heating chamber using a waveguide, and heats food. It has the characteristic that heating can be realized. On the other hand, because of the short wavelength, the power half-depth is small, and in the case of a thick object to be heated, it cannot be heated up to the inside, and there is a disadvantage that uneven heating is likely to occur.

On the other hand, the HF heating method uses a parallel plate type electrode in which the first and second electrodes are arranged in parallel, sandwiches the food to be heated between the first and second electrodes, Since dielectric heating is performed by applying electric power, and it has a long wavelength, it has a feature that the power half-life is high and large objects can be heated uniformly. Also, since the thermal efficiencies for ice and water are almost equal, uniform thawing can be achieved when thawing.

In addition, by placing the food to be heated in the heating chamber and heating the entire heating chamber with a heater, the food can be heated from the outside while being browned. Ovens of the so-called circulation fan type have become remarkably widespread in ordinary households due to the westernized eating habits.

Therefore, taking advantage of the advantages of each method, a combination of multiple heating methods such as a combination of microwave heating and HF heating, microwave heating and heater heating, or microwave heating and heater heating and HF heating is used. Equipment is attracting attention, and how to arrange each member in the heating chamber in order to exhibit each function efficiently is a major issue.

For example, in a combined heating device having a structure in which HF heating and heater heating are used in combination, the upper electrode, one of the parallel plate electrodes for HF heating, is movable, and a hole is provided in the upper electrode to allow heat from the heater to be heated. There has been proposed a structure in which the transmission is sufficiently performed (see Patent Documents 1 and 2).

Further, in order to increase the cooking speed, as shown in FIG. 24, there has been proposed a cooker in which the horizontal position of a tube heater arranged in a heating chamber is variable (Patent Document 2). In this cooker, movable heaters 16 1 and 16 2 composed of tube heaters are provided in a heating chamber 102. In this movable heater, the distance between the arms 16 1 c of the first movable heater 16 1 is made larger than the distance between the arms 16 2 c of the second movable heater 16 2, and the respective lengths are increased. The same length L 1, L 2, and the above-mentioned rotating shafts 16 1 a, 16 2 a have the same height, and at the tip, the first heating part is engaged with the second heating part. The two movable heaters are rotatably supported by a driving mechanism 112 provided on the upper outer surface of both side walls of the heating chamber 102 while being shifted in the horizontal direction.

This structure has the advantages that the heater is close to the object to be heated, so that the heat efficiency is good and the adjustment can be performed in a short time.

(Patent Literature 1) Japanese Patent Application Laid-Open No. 9-82468 (Patent Document 2) Japanese Patent Application Laid-Open No. 2000-2004

(Patent Document 3) Japanese Patent Application Laid-Open No. 91-924555 (Claims, FIG. 1 and FIG. 6) (Patent Document 4) Japanese Patent Application Laid-Open No. 9_822469 Paragraph 0 02 2, Fig. 1 However, in the conventional configuration, the heating electrode that moves up and down requires a lifting range of at least about 10 Omm to concentrate the electric field between the heating electrodes, and furthermore, turns to make the electric field distribution uniform. It is also required to maintain the parallelism between the lower heating electrode and the lower heating electrode, which also functions as a table. Had. Moreover, in the configuration shown in Patent Document 2, the upper heating electrode is only suspended at one point by a flexible heat-resistant material, and is extremely unstable and tilts to maintain the parallelism with the lower heating electrode. Cheap. The upper electrode is wound up by a motor in the upward direction, but moves only by human force in the downward direction, and it is difficult to match to minimize the reflected power in order to obtain the maximum oscillation output.

The present invention solves the conventional problems by devising a movable configuration of a heating electrode, and is a compact device having a degree of freedom in an installation place, and can surely maintain parallelism between the electrodes, thereby achieving oscillation output. It is an object of the present invention to provide a high-frequency heating apparatus which can easily and reliably perform matching for obtaining the maximum value, and which can be used with high reliability and high performance in combination with dielectric heating and microphone mouth-wave heating. · One ·

Further, in the conventional configuration shown in FIG. 24, the areas of the first and second heat generating parts are small, and even if the area covered with the reflector 107 can be uniformly heated by radiant heat, the area is uniformly heated. The area of the region to be heated is less than one-fourth of the area of the heating chamber, and there is a problem that the area for enabling uniform heating cannot be made sufficiently large.

Therefore, when heating an object to be heated larger than the area of the heater, uniform heating cannot be performed without using a turn-tele. For this reason, there was a problem that square top plate cooking or square top plate two-stage cooking could not be performed.

The present invention has been made in view of the above circumstances, and has as its object to provide a heating device capable of performing uniform and highly efficient heating. In the conventional configuration, the heater is fixed so as to protrude outward from the top surface of the heating chamber. The heater is far from the object to be heated, and part of the heat is blocked by the upper electrode for HF heating. In addition, it was difficult to achieve uniform heating unless the object to be heated was heated while rotating using a turntable. Therefore, it was necessary to use a turntable. In addition, uniform heating was not possible in cooking using a square top plate, and it was difficult to simultaneously heat a large amount of roll bread and pudding, as well as mouth cake and date rolls. As described above, the conventional heating apparatus has a problem that it is not possible to perform square top plate cooking or square top plate two-stage cooking.

Also, as for the components for heating HF, since the heater is installed at the place where the upper electrode (first electrode) is installed, there is also a problem that the mounting structure becomes complicated.

Furthermore, the structure inside the heating chamber was complicated, the number of parts was large, and there was a limit to miniaturization of the equipment.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a combined heating device that can be downsized and can perform uniform and highly efficient heating.

In addition, in the conventional configuration, it is difficult to efficiently propagate the microphone mouth wave to the heating area because other components are present in the heating chamber in a complicated manner, and sufficiently uniform microphone mouth wave heating is realized. Was difficult.

The present invention has been made in view of the above circumstances, and has as its object to realize highly efficient and uniform microphone mouth-wave heating in a composite heater.

In order to achieve the above object, a heating device according to the present invention includes: a placement unit provided in the heating chamber for placing an object to be heated; and a heating unit having a planar heating unit provided in the heating chamber. The heat generating portion is formed so as to be able to adjust the distance to the object to be heated while maintaining a parallel state with respect to the placing means.

According to this configuration, the area of the planar heat generating portion can be maximized, so that the area where uniform heating can be performed can be increased. Therefore, a large area can be uniformly heated by using the heating chamber to the maximum without using a turn table. In addition, since the heating part can be installed close to the object to be heated, Thermal efficiency is improved. In addition, the position of the heat generating portion can be adjusted according to the shape or composition of the object to be heated, and an optimal heat generating portion arrangement can be realized for each object to be heated. In addition, the present invention provides the heating device, wherein the heating means includes the heat generating portion, and elevating means for moving the heat generating portion up and down while keeping the heat generating portion horizontal. According to this configuration, the distance between the heat generating portion and the object to be heated can be easily adjusted by the lifting / lowering means.

Further, according to the present invention, in the heating device, the heating unit can be housed in a top surface of the heating chamber. According to this configuration, the effective volume in the heating chamber can be increased, and the cleaning of the heating chamber is facilitated, and the usability is improved. Further, the present invention provides the heating device, wherein the heat generating portion has an area of 50% or more of an area of a top surface of the heating chamber. According to this configuration, a large area can be uniformly heated at a time. Therefore, uniform heating can be performed without a turntable, and good baking can be obtained even when the object to be heated is large, or when a large number of objects to be heated need to be heated at once.

Further, the present invention is the planar heater, wherein the heating unit is provided with a heating resistor supported by an insulating plate-like body. According to this configuration, by changing the arrangement pattern of the heating resistors, the characteristics of the planar heater can be easily changed, for example, the central portion of the heater is strong. Furthermore, when using a my force, for example, for an insulating plate-shaped body, it has the features of low cost and high heat resistance.

In addition, the present invention is the heating device, wherein the heat generating portion is a planar heater formed such that a part of the sheathed heater forms a meandering portion to form a planar shape. According to this configuration, by changing the molding pattern of the sheathed heater, the characteristics of the planar heater can be easily changed, for example, such that the central portion of the heater has a strong power.

Also, the present invention provides the heating device, wherein the elevating means includes at least one arm-shaped support member that supports the heat generating unit and is rotatable in the heating chamber. It is possible to move up and down by rotating the support member. Further, according to the present invention, in the heating device, the heat generating portion is rotatable with respect to the support member. With this configuration, the movable range of the heat generating portion can be widened. In addition, the present invention provides the heating device, wherein the elevating means includes a support member formed of a bellows-like tubular body that supports the heat generating unit and is capable of expanding and contracting in the heating chamber. With this configuration, the planar heater can be easily moved by expanding and contracting the bellows-like tubular body.

Further, according to the present invention, in the heating device, the support member accommodates an energization line to the heat generating portion inside. With this configuration, since the current-carrying wires are not exposed in the heating chamber, tally jung is easy and the usability is improved.

Further, according to the present invention, in the heating device, the heat generating portion is configured to be able to be electrically connected via a connector provided on an inner wall of the heating device. With this configuration, since there is no need to arrange a conducting wire in the heating chamber, there is no unevenness in the heating chamber, the effective volume in the heating chamber is increased, and talli jung is facilitated.

Further, according to the present invention, in the heating device, the connector is configured such that a connection portion is formed so as to be able to move up and down, a connector is provided, and the connector is protected by the cover when not in use. With this configuration, it is possible to provide a long-life and highly reliable heating device without fear of contamination of the connector.

Further, in the heating device according to the present invention, at least a part of a surface of the heat generating portion is formed of a ceramic material. According to this configuration, since the heat generated from the heat generating portion is applied to the object to be heated via the ceramic material, the effect of far infrared rays can be used. Further, there is an effect that dirt is hardly adhered even when the heating part and the object to be heated come into contact with each other.

In the heating device, the heating unit may further include a temperature detection unit configured to detect a temperature of the object to be heated, and the elevating unit may be configured to determine the temperature based on a temperature detection result of the temperature detection unit. The heating unit is configured to move up and down. With this configuration, when the temperature of the object to be heated is low, the heating section is brought closer to the object to be heated, so that the thermal efficiency is increased and the heating can be performed in a short time. On the other hand, when the temperature of the object to be heated is high, it is possible to prevent overheating of the object to be heated by moving the heat generating portion away from the object to be heated. Furthermore, the present invention is configured such that in the heating device, the heat generation unit adjusts a heat generation amount based on a temperature detection result of the temperature detection unit. With this configuration, when the temperature of the object to be heated is low, heating can be performed in a short period of time by increasing the calorific value. On the other hand, when the temperature of the object to be heated is high, overheating of the object to be heated can be prevented by reducing the calorific value.

ADVANTAGE OF THE INVENTION According to the heating apparatus which concerns on this invention, since the area | region of a planar heating part can be maximized, the area | region which can be uniformly heated can be enlarged. Therefore, a large area can be uniformly heated by using the heating chamber to the maximum without using a turntable. In addition, since the heat-generating portion can be placed close to the object to be heated, thermal efficiency is improved. In addition, the position of the heat generating portion can be adjusted according to the shape or composition of the object to be heated, and an optimal heat generating portion arrangement can be realized for each object to be heated. In order to achieve the above object, a heating device according to the present invention includes a mounting table on which an object to be heated is mounted, a fixed electrode that is a heating electrode installed below the mounting table, and a heating electrode installed above the object to be heated. A movable electrode and a plurality of substantially U-shaped support rods rotatably supporting the movable electrode.The plurality of substantially U-shaped support rods are provided with rotation centers on the left and right heating chamber walls, and a plurality of substantially U-shaped support rods are provided. With the lower side of the mold support rod rotating and moving while maintaining the parallelism with the fixed electrode, it was possible to move the movable electrode up and down while maintaining the parallelism with the fixed electrode. -This allows the movable electrode to move up and down from the upper plate of the heating chamber to the vicinity of the mounting table, and the movable device can be installed on the side wall of the heating chamber without increasing the height and depth of the heating device. Is also good. Furthermore, since the movable electrode is held by a plurality of substantially u-shaped support rods, it can be surely kept parallel to the fixed electrode. In addition, since it can be moved up and down, matching that minimizes reflected power to obtain the maximum oscillation output can be easily and reliably adjusted. With these effects, it is possible to make a highly reliable and high-performance device in a compact form comparable to a general-purpose microwave oven, while keeping the space to store the heated object in a convenient volume. It is possible to provide a high-frequency heating device using dielectric heating, which can be installed in a general household kitchen. The present invention relates to the heating device, wherein the plurality of substantially u-shaped support rods are constituted by hollow circular conductor pipes, and the support electrodes can be light and strong, and the movable electrode is a fixed electrode. The lifting and lowering movement can be performed smoothly and reliably while maintaining the parallelism with. The present invention relates to the above-mentioned heating apparatus, in which the substantially U-shaped support rod, the movable electrode, and the heating chamber are electrically connected, and one of the high-frequency power supply lines of the power supply is connected to the heating chamber. High frequency power can be supplied without using wires for the electrodes.

The present invention relates to the above-described heating apparatus, and more particularly to a microwave power supply port provided at the bottom of the heating chamber for radiating microwaves into the heating chamber, a microwave generator for generating microwaves, and a microphone mouth wave generator. It is possible to provide a high-frequency heating apparatus that includes a waveguide that guides a microphone mouth wave to a microphone mouth wave feed port and is configured to be capable of microwave heating and that can use both dielectric heating and microwave heating.

The present invention can provide a high-frequency heating device in which the heating device is provided with a hot air heater on the back surface of the heating chamber, and dielectric heating and oven heating can be used in combination. Further, in order to achieve the above object, a heating device of the present invention is provided with a heating chamber, a mounting means provided in the heating chamber, a mounting means for mounting an object to be heated, and a heating means provided in the heating chamber. A heater heating means provided with a planar heating section for heating an object by resistance heating; first and second electrodes provided in the heating chamber; supplying a high-frequency voltage between these; HF heating means for heating the object at high frequency; and wherein the first electrode of the HF heating means is provided near the heating section of the heater heating means.

According to this configuration, the planar heating section provided by the resistance heating is provided in the heating chamber, so that the heating section can be made compact and close to the object to be heated, and the thermal efficiency can be improved. In addition, since the first electrode is provided in the vicinity of the planar heating portion, it plays a role of a heat conduction plate during resistance heating, and can improve thermal efficiency and uniformity of heat distribution. .

Further, according to the present invention, in the heating device, the first electrode and the heating unit are integrally connected to each other to form a heating unit. With this configuration, the mounting structure is simplified, and the installation space can be reduced. In addition, it is possible to make the storage items in the heating chamber more compact, and the role as a heat conduction plate at the time of resistance heating is further improved.

Further, according to the present invention, in the heating device, the first electrode is a ground potential side electrode.

With this configuration, no special power supply mechanism is required, and grounding may be performed by, for example, contacting the inner wall of the heating chamber or the like. Therefore, the structure can be simplified. Further, the present invention provides the heating device, further comprising an elevating means for elevating the heating unit.

With this configuration, the position of the heat generating portion can be adjusted according to the shape or composition of the object to be heated, and an optimal heat generating portion arrangement can be realized for each object to be heated.

Further, the elevating means is capable of elevating and lowering while maintaining the parallel state of the heating section and the first electrode.

As a result, the area of the planar heat-generating portion can be maximized, so that the area capable of uniform heating can be increased. Therefore, a large area can be uniformly heated by using the heating chamber to the maximum without using a turntable.

Further, in the present invention, in the heating device, the heating unit can be housed so as to be in close contact with a top surface of the heating chamber. ·

With this configuration, it is possible to use the room more efficiently.

Further, in the present invention, in the composite heating device, the heating unit includes a case serving also as a first electrode arranged in parallel with the mounting means, and a planar heating unit housed in the case. It is characterized by having done.

With this configuration, the heat generating portion and the first electrode can be integrally formed with a very simple configuration, and the thickness can be reduced, so that the room can be used more effectively. Further, in the present invention, in the heating device, the first electrode is formed of a metal plate so as to also serve as a microwave reflecting surface. Thereby, the microphone mouth wave reflection surface and the first electrode can be configured by one metal plate, and the microphone mouth wave heating and the high-frequency heating can be optimized with a thin and extremely simple configuration.

Further, according to the present invention, in the heating device, the case is a metal case provided with a through portion for a power supply lead to the heat generating portion.

With this configuration, the heat generating portion has a structure surrounded by the metal case, and the portion exposed in the heating chamber has no irregularities. Therefore, the dirt is small and cleaning is easy. Further, in the present invention, the heating unit includes: the heat generating portion; and a conductive plate-like member joined to the heat generating portion via an electrical insulating member. Constitutes the first electrode.

With this configuration, the planar heating section and the first electrode of the HF heating means can be formed physically with a very simple configuration, and the thickness can be reduced, so that the room can be used more effectively. It is possible.

Further, in the present invention, in the heating device, the heat generating portion is formed of an assembly of tube heaters in which a part of a sheathed heater forms a meandering portion and is formed to have a planar shape, and is in close contact with the tube heater. The first electrode made of a conductive plate is joined as described above. According to this configuration, since the heater can be formed without largely changing the configuration from the conventional heater, the conventional component can be used. In addition, the planar heat generating portion and the first electrode of the HF heating means can be formed physically with a very simple configuration, and can be made thinner, so that the room can be used more effectively.

In the present invention, in the heating device, the heating unit is 50% or more of an area of a top surface of the heating chamber.

With this configuration, the area where uniform heating is possible can be increased, and a large amount of material can be heated simultaneously.

According to the present invention, in the heating device, the elevating means includes at least one arm-shaped support member that supports the heating unit and is rotatable in the heating chamber.

With this configuration, it is possible to raise and lower the heat generating portion or the first electrode with a simpler configuration. Further, according to the present invention, in the heating device, the elevating means includes a support member formed of a bellows-shaped tubular body that can expand and contract in the heating chamber.

Further, according to the present invention, in the heating device, the support member accommodates therein a communication wire to a heating unit.

Further, according to the present invention, in the heating device, the heat generating portion is configured to be able to be electrically connected via a connector disposed on an inner wall of the heating device.

Further, in the present invention, in the heating device, the connector is configured such that a connection portion is formed so as to be able to move up and down, has a lid portion, and is protected by the lid portion when not in use.

With this configuration, it is possible to provide a long-life and highly-reliable combined heating device without fear of contamination of the connector.

Further, according to the present invention, in the heating device, the first electrode is in electrical contact with an inner wall of the grounded heating chamber.

With this configuration, the device configuration is further simplified.

As described above, according to the heating device of the present invention, the planar heating section of the heater heating section is provided in the heating chamber, and the first electrode of the HF heating section is located near the planar heating section. Since it is provided in a space, it is possible to be compact and close to an object to be heated, thereby improving thermal efficiency. Further, at the time of resistance heating, it plays a role of a heat conduction plate, and can improve thermal efficiency and heat distribution. -In order to achieve the above object, according to the present invention, in microwave heating, a reflecting member that can move up and down is disposed on a surface facing the object to be heated, and the region including the object to be heated is reflected by the microwave. By forming a confinement region of the microphone mouth wave inside the microwave, the object to be heated can be efficiently microwave-heated. The heating unit is used as a movable heater in a heater heating method or an electrode in an HF heating method.

That is, the heating device of the present invention comprises: a heating chamber; a mounting means provided in the heating chamber, for mounting an object to be heated; a microwave generating means for radiating microwaves into the heating chamber; A reflecting member including a material that reflects the microwave, the reflecting member including a material that reflects the microwave; The wave space is configured to be variable in size. For example, a heating unit such as a heating unit by resistance heating may be used as a microwave reflecting plate.

With this configuration, by moving the reflecting member up and down in the heating chamber, the microwave propagation region can be well defined, and uniform heating can be performed. In the case of microwave heating, if the surface of the reflector is made to be a multiple of a quarter wavelength (n / 4λ), the magnetic field will be 0, and microwave leakage will be eliminated and sealing will be efficient. It has been found that uniform heating can be achieved efficiently and efficiently. Therefore, the reflecting member can be moved up and down, and the microphone mouth wave can be well sealed in the optimum space, and the heating area can be adjusted to a desired size.

Further, according to the present invention, in the heating device, the heating device further includes a heater heating unit having a planar heating unit configured to heat the object to be heated by resistance heating, and the reflection member includes a heating unit having the heating unit. It is characterized by being attached to a unit.

As described above, in the case where the heating unit is provided with the heater heating means, the planar heating section by the resistance heating is provided in the heating chamber. Not only does it not work, but also actively works to optimize microphone mouth-wave heating.

Further, the planar heat-generating portion is compact and can be brought close to the object to be heated, so that the thermal efficiency can be improved. In addition, since the first electrode is provided in the vicinity of the planar heat generating portion, it plays a role of a heat conductive plate at the time of heating the heater, and can improve thermal efficiency.

In the present invention, the heating unit further includes: a first and a second electrode provided in the heating chamber; and an HF heating unit configured to supply a high-frequency voltage therebetween to perform high-frequency heating of the object to be heated. Includes the first electrode. With this configuration, the microwave propagation region can be well defined by using the first electrode of the HF heating means provided in the heating chamber as a microwave reflector. Then, the phase of the surface of the reflector can be controlled only by moving the first electrode up and down. In the case of microwave heating, if a multiple of a quarter wavelength (η Ζ 4 λ) is set on the surface of the reflector, the magnetic field will be 0, and microwave leakage can be eliminated and sealing can be performed efficiently. Good uniform heating can be achieved. There face The reflector can be moved up and down only by moving the heat-generating portion up and down, and the heating area can be adjusted to a desired size.

In this way, microwaves can be efficiently contained, and uniform heating can be achieved.

In addition, according to the present invention, the first electrode used in the case of HF heating is provided in the heating chamber, not only does not hinder microwave heating but also actively optimizes microwave mouth-wave heating. Works effectively.

In addition, the first electrode is compact and can be brought close to the object to be heated, so that the heating area can be brought close to the object to be heated even during HF heating, and the thermal efficiency can be improved. In addition, since the first electrode made of a conductor such as a metal plate is provided near this planar heat-generating part, it plays the role of a heat conductive plate when heating the heater, thereby improving thermal efficiency. Becomes possible.

Further, in the present invention, in the heating device, the first electrode is formed integrally with the planar heating portion.

According to the above configuration, in the heating apparatus using the heater heating unit, the HF heating unit, and the microwave heating unit, the planar heating unit includes the first electrode of the HF heating unit, and the microwave of the microwave microwave heating unit. It plays three roles as a partition plate for defining the wave generation area, and extremely complicated heating control can be realized with an efficient and compact configuration. Further, in the present invention, in the heating device, the first electrode is a ground potential side electrode.

By arranging the ground-side potential on the movable side, for example, it is only necessary to make contact with the inner wall of the heating chamber connected to the ground potential, so that simplification can be achieved.

Further, according to the present invention, in the heating device, an elevating means for elevating the heating unit is provided.

With this configuration, the position of the heat generating portion can be easily adjusted according to the shape or composition of the object to be heated, and an optimal heat generating portion arrangement can be realized for each object to be heated. Further, in the present invention, in the heating device, the heating unit can be housed in a top surface of the heating chamber.

With this configuration, it is possible to use the room more efficiently. Further, in the present invention, in the heating device, the heating unit includes a case having a microwave reflecting surface arranged in parallel with the placing means, and a planar heating unit housed in the case. It is characterized by having.

With this configuration, the heat generating portion and the microwave reflecting surface can be integrally formed with a very simple configuration, and the thickness can be reduced, so that the room can be used more effectively. Further, according to the present invention, in the heating device, the microwave reflecting surface is formed of a metal plate, and the metal plate forms the first electrode.

Thereby, the microphone mouth wave reflection surface and the first electrode can be constituted by one metal plate, and microwave heating and high-frequency heating can be optimized with a thin and extremely simple structure.

With this configuration, the heat generating portion has a structure surrounded by the metal case, and the portion exposed in the heating chamber has no irregularities. Therefore, the dirt is small and cleaning is easy. Further, in the present invention, the heating unit includes: a heat generating portion; and a conductive plate-like member joined to the heat generating portion via an electrical insulating member. Construct the first electrode.

With this configuration, the planar heating portion and the first electrode of the HF heating means can be formed physically with a very simple configuration, and the thickness can be reduced. Available.

In the present invention, in the heating device, the heating unit is 50% or more of an area of a top surface of the heating chamber. With this configuration, the area where uniform heating is possible can be increased, and a large amount of material can be heated simultaneously.

With this configuration, the planar heat generating portion or the first electrode can be raised and lowered with a simpler configuration.

Further, according to the present invention, in the heating device, the elevating means includes a support member formed of a bellows-like tubular body that can expand and contract in the heating chamber.

Further, in the present invention, in the heating device, the support member accommodates therein an energizing wire to the planar heat generating portion.

Further, according to the present invention, in the heating device, the planar heat generating portion is configured to be electrically connected to the heating device via a connector disposed on a wall. Further, in the present invention, in the heating device, the connector is configured such that a connection portion is formed so as to be able to move up and down, has a lid portion, and is protected by the lid portion when not in use.

With this configuration, it is possible to provide a long-life and highly reliable heating device without fear of contamination of the connector.

With this configuration, the device configuration is further simplified.

As described above, according to the heating device of the present invention, by using the heating portion of the heater heating means provided in the heating chamber or the first electrode of the HF heating means as a microwave reflecting plate, a good microwave The wave propagation region can be defined, and highly efficient microwave heating can be performed. Further, the reflector can be moved up and down only by moving the planar heating portion or the first electrode up and down, so that the heating area can be adjusted to a desired size. Brief description of drawings> FIG. 1 is a perspective view of a main part of a high-frequency heating device showing a state of a movable electrode during dielectric heating according to a first embodiment of the present invention,

FIG. 2 is a perspective view of a main part of the high-frequency heating device viewed from below,

Fig. 3 is (a) a top view of a substantially U-shaped support rod of the high-frequency heating device, (b) a front view, and (c) a side view,

FIG. 4 is a first perspective view of a main part explaining the movement of a movable electrode of the high-frequency heating device.

FIG. 5 is a perspective view of a second main part illustrating the movement of the movable electrode of the high-frequency heating device.

FIG. 6 is a third perspective view of the principal part explaining the movement of the movable electrode of the high-frequency heating device.

FIG. 7 is a diagram showing a schematic configuration of a heating device for explaining a second embodiment of the present invention,

FIG. 8 is a cross-sectional view of the heating unit.

FIG. 9 is a perspective view of a winding frame formed by winding a heating resistor.

FIG. 10 is an enlarged view of the arm,

FIG. 11 is a diagram illustrating a change in the position of the heating unit due to the rotation of the arm, and FIG. 12 is a diagram illustrating a schematic configuration including a driving unit of the heating device according to the second embodiment. , '

FIG. 13 is a cross-sectional view of a heating unit configured so that the arm can be stored in the metal case lid.

Fig. 14 is a cross-sectional view of the heating hut with the lead wire and the ground wire passed through the arm.

FIG. 15 is a cross-sectional view of a heating unit for bringing a metal case and an arm into electrical contact,

FIG. 16 is a cross-sectional view of a heating unit having a different shape of a metal case, FIG. 17 is an exploded perspective view of a heating unit having a configuration in which a flat heater is sandwiched, and FIG. 18 is an eighth embodiment. It is a front view of a heating device in the form of

FIG. 19 is a front view of the heating device of the ninth embodiment, FIG. 20 is a front view of the heating device of the tenth embodiment,

FIG. 21 is a front view of the heating device according to the first embodiment,

FIG. 22 is a front view of the heating device of the first and second embodiments,

FIG. 23 is a front view of the heating device of the thirteenth embodiment,

FIG. 24 is a diagram showing a configuration of a conventional cooking device.

Reference numerals in the drawing, 1 110 is a heating chamber, 1 1 1 is a mounting table, 1 1 2 is a movable electrode, 1 1 3 is a fixed electrode, 1 1 4 a, 1 1 4 b are a plurality of substantially U-shaped Die support bar, 1 16 is connection fitting, 1 17a, 1 17b, 1 17c, 1 1 17d is fixed hole (center of rotation), 1 1 8 is movable gear 1, 1 9 Is a movable motor, 124 is a microwave power supply port, is a main body case, 2 is a partition wall, 2a is a ventilation hole for intake, 2b is a ventilation hole for ventilation, 3 is a heating room, and 4 is a tape. ), 5 is a heating unit (heating means), 50 is a planar heater (heating section), 51, 56, 57 is a metal case (first electrode), 51a, 56a, 57a Is a lid, 51b, 56b, and 57b are case bodies, 52 is a winding frame, 53 is a heating resistor (heating part), 54 is a lead wire, 55 is a ground wire, 56 c is a ceramic member, 56M is a metal film, S is a spacer, 58a and 58b are metal plates, 59a and 59b are insulating plates, and 59S is insulated Plate, 6 is lifting means, 6 1, 6 2, 6 3 are arms (raising / lowering means), 6 a, 6 2 a are shaft parts, 6 1 b, 6 2 b are arm holding parts, 7 is an opening / closing door, 8 1 is an HF power supply section, 8 2 is a second electrode, 9 1 is a magnetron, 9 2 is a waveguide, 9 3 is a rotating waveguide, 501 is a temperature detecting means, 50 2 is a control section, 5 0 3 is a driving unit, 5-04 is a power supply, 20 is a bellows-like tubular body (elevating means), 22 is a nested tubular body (elevating means), 24 is a pin (elevating means), 21 , 23, 25, 29, and 40 are lead wires, 26, 30 and 32 are holding parts, 27 is a supporting member, 28 is a sliding holding part, and 31 and 33 are sliding parts. , 34 is the upper case, 35, 36, 37, 38 are frames, 39 is a motor, 5a is a connector, 41 is a connector with a lid, 41a, 41b, 41c, 4 1 d and 4 le are connectors, 42, 43 and 44 are hooks, and M is a microwave heating space.

(First Embodiment)

Hereinafter, a first embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a main part of a high-frequency heating device showing a state of a movable electrode during dielectric heating according to a first embodiment of the present invention. In FIG. 1, the door provided in the front of the heating chamber for taking in and out the object to be heated, and the outer box forming the outer shell of the entire apparatus are omitted because they need not be particularly described. In FIG. 1, reference numeral 110 denotes a heating chamber formed of a metal material for housing the object to be heated, and 111 denotes a ceramic mounting table on which the object to be heated is mounted, and one part thereof is cut away for explanation. Reference numeral 112 denotes a movable electrode for dielectrically heating the object to be heated, and moves up and down in the heating chamber 110. Reference numeral 1 13 denotes a fixed electrode installed below the mounting table. The movable electrode 1 1 2 is rotatably fixed to a substantially U-shaped support rod 1 14 a · 1 14 b using a circular conductor pipe by a mounting plate 1 1 5 a '1 1 5 b. Further, the movable electrode 112 is electrically connected to the substantially U-shaped support rod 114a by a connection fitting 116. Approximately U-shaped support rod 1 14a ■ 1 14b is fixed at the left and right symmetrical position on the side wall of heating chamber 1 10 Rotating by 1 1 7a '1 1 7b' 1 1 7c '1 17 d It is fixed freely. The substantially U-shaped support rods 114a and 114b are rotatable about the fixing holes 1117a and 117b and 117c and 117d as rotation centers. The substantially U-shaped support rod 114a is in electrical contact with the heating chamber 110 at the fixing holes 1117a and 1117b.

On the right side of the heating chamber 110, a movable gear 118 and a movable motor 119 for moving the substantially U-shaped support rods 114a and 114b are provided. Similarly, on the right side of the heating chamber 110, the power supply 120 and the power supply 120 for supplying high frequency to the movable electrode 112 and the fixed electrode 113 for dielectric heating are used to match the impedance of the object to be heated. A matching condenser 121 and a matching coil 122 are provided. The power supply 120 also has a mechanism (such as a CM-type SWR circuit) that detects the supplied power and the reflected power. Matching capacitor 121 is connected in parallel, matching coil 122 is connected in series, and the lead wire connected to the other end of matching coil 122 is connected to heating chamber 110. Are connected to the fixed electrodes 113 through connection terminals 123 through through holes provided at the bottom of the base. In addition, the movable electrode 1 1 2 is electrically connected to a substantially U-shaped support rod 114 a using a circular conductor pipe by a connection fitting 116, and further, the substantially U-shaped support rod 114 a is a fixing hole. It is electrically connected to the heating chamber 110 at 1 17 a and 1 1 1 b. Also, one of the high-frequency power supply lines On the other hand, by connecting the ground line to the heating chamber 110 as a chassis ground, the movable electrode 112 and the power supply 120 are electrically connected without using a lead wire. The high-frequency power generated by the power supply 120 in this way is supplied to the heating electrode (movable electrode 112-fixed electrode 113).

At the center of the bottom plate of the heating chamber 110, there is a microwave feed port 124 for performing microwave heating, and on the back plate of the heating chamber 110, there is a blowout port 125 of hot air blown out during open heating.

FIG. 2 is a perspective view of a main part viewed from below. In FIG. 2, reference numeral 126 denotes a microwave generator for generating microwaves for microwave heating, and reference numeral 127 denotes a microwave generated by the microwave generator 126. The waveguide leading to 4. On the back of the heating chamber 110, a hot air heater 128 for heating the oven is installed. The heat generated by the hot air heater 1 28 is agitated by the circulation fan motor 1 29 and is blown into the heat chamber 110 by the hot air outlet 1 25 cara caro shown in Fig. 1 provided on the back plate of the heating chamber. Is done.

Next, the operation of the movable electrodes 112 will be described. Fig. 3 shows an outline drawing of a substantially U-shaped support rod 1 1 4a holding the movable electrode 1 1 2 1 1b, where (a) is a top view, (b) is a front view, (C) is a side view. Substantially U-shaped support bar 1 1 4a ■ 1 1 4b is a U-shaped shape with a bent horizontal joint as shown in the front view. The difference between the substantially U-shaped support bar 1 1 4a (rear side) and 1 1 4b (front side) is only the width of the U-shape (L a> L b). 2 in order that the substantially U-shaped supporting bar 1 1 4 a and 1 1 4 b when raised to the top of the heating chamber 1 1 0 do not overlap _c Further, U-shaped as seen in a top view The step (t) is provided in the joint between the movable electrode 1 and the upper plate of the heating chamber as much as possible so as not to disturb the loading and unloading of the object to be heated during microwave heating. In order to approach.

FIG. 4, FIG. 5, and FIG. 6 are perspective views of relevant parts for explaining the movement of the movable electrode 112. FIG. Unnecessary items are omitted for clarity. FIG. 4 is a diagram showing a state where the movable electrode 1 1 2 has been lowered to the lowermost stage. The shape of the gear formed on the lower side of the movable gear 1 1 8 meshes with the gear at the tip of the rotating shaft of the movable motor 1 1 9, so the movable gear 1 1 8 can move back and forth You. (Indicated by arrows). On the other hand, the obliquely bent joints of the substantially U-shaped support rods 114a and 114b are inserted into the holes provided in the movable gear 118, so that the substantially U-shaped support rod 114 a and 114b are parallel to each other around the fixed holes 117a and 117b and 117c and 117d of the heating chamber 110 in response to the movement of the movable gear 118 back and forth. Rotate while maintaining. In FIG. 4, the movable gear 118 is at the frontmost position, and the lower side of the U-shape of the substantially U-shaped support bars 114a and 114b is at the lowest position. The movable electrode 112 is rotatably and loosely fixed to the lower side of the U-shape of the substantially U-shaped support rods 114a and 114b by the mounting plates 115a and 115b. It moves following the rotational movement of the lower side of the U-shape of the rods 114a and 114b, but always keeps parallel to the fixed electrode 113. Fig. 5 shows that the movable electrode 1 12 is slightly higher than the lowermost stage with the movable gear 118 moved slightly backward, and Fig. 6 shows that the movable electrode 118 is movable with the movable gear 118 moved most backward. In this case, the distance between the movable electrode 1 12 and the fixed electrode 113 (t 1 t 2 t 3) changes, but the movable electrode 1 12 and the fixed electrode The pole 113 remains parallel. When performing dielectric heating, it has been confirmed that the efficiency is highest when the heating electrodes are parallel, and with the structure of the present invention, heating objects of various sizes entering the heating chamber 110 can be obtained. The most efficient dielectric heating can be performed. In addition, the substantially U-shaped support rod 114a'114b uses a circular conductor pipe, so that it is a light and strong-strong one, and the movable electrode 1f2 can be lifted reliably and accurately. Fall · Can be held.

Next, the operation of dielectric heating using the heating electrode will be described.

The movable electrode 112 normally waits in a state of being closest to the upper plate (not shown) of the heating chamber 110 as shown in FIG. When performing dielectric heating, place the object to be heated on the mounting table 1 1 1 shown in Fig. 1, then close the opening / closing door (not shown) and press the heating start key on the operation panel (not shown). The movable electrode 1 12 moves close to the object.

Thereafter, the power supply 120 is operated at a low output, and the movable electrode 112 is moved up and down so as to minimize the reflected power in order to obtain the maximum oscillation output. When the position of the movable electrode at which the reflected power is minimized is determined, the movable electrode 112 is stopped at that position. So Thereafter, the output of the power supply 120 is increased to a predetermined specified output, and dielectric heating of the object to be heated is performed.

The power supply 120 detects the reflected power even during the continuation of the dielectric heating, and controls the movable electrode 112 to move up and down so as to reduce the reflected power. Then, after the input time elapses, the cooking ends, and the movable electrode 112 returns to the initial standby position.

As a method of reducing the reflected power during the continuation of the dielectric heating, a method of variably controlling the value of the capacitor or coil of the matching circuit can also be used. In this case, the capacitor is switched by changing the capacitance value or changing the number of parallel connections of multiple capacitors, and the coil is expanded or contracted or controlled by the core insertion length. The termination of the dielectric heating may be automatically performed based on a temporal change of the reflected power.

In the case of microphone mouth-wave heating, the movable electrode 112 is placed at the position shown in FIG. Since the movable electrode 1 12 is at the highest position, the heating chamber 110 can be used widely, and microwave cooking can be performed on tall cooked foods. In addition, if the movable electrode 112 is moved up and down within a range that does not hit the food while microwave heating is performed, the microwave is agitated and uneven heating is eliminated. Also, in the present invention, the so-called “thaw warming” in which microwave heating is performed continuously after dielectric heating can be easily performed by raising and lowering the movable electrode 112 in the present invention.

Roughly, according to the present invention, in the first embodiment, the movable device of the electrode-(movable gear ^ "1 18 'movable motor 1 19), power supply 120 and matching circuit (matching capacitor 1 2 1) By installing the matching coil 1 2 2) on the side wall of the heating chamber 1 10, the hot air heater 1 2 7 for open heating and the circulation fan motor 1 2 8 will be installed behind the heating chamber 1 10. It is possible.

In addition, as an example of the configuration dimensions of the embodiment of the present invention, the shape of the movable electrode 112 is width 250 mm, depth 200 mm, and the shape of the fixed electrode 113 is width 250 mm, depth The movable electrode 1 1 2 has a vertical range of 160 mm, and the gap between the movable electrode 1 1 2 and the mounting table 1 1 1 is 3 O mm.

(Second embodiment) Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 7 is a diagram showing a schematic configuration of a heating device for explaining a second embodiment of the present invention. The heating device of the present embodiment includes a table 4 as a mounting means for mounting an object to be heated in a heating chamber 3 formed by a main body case 1 and formed of an internal space partitioned by a rear partition wall 2. It is used as a multi-function open range that can perform heater heating, HF heating, and microwave heating on the food that is the object to be heated placed in the heating chamber 3. HI, HF heating means H2, microwave heating means H3, and oven heating means H4. The heating device of the present embodiment is characterized in that a flat heating tub 5 which can be moved up and down while maintaining a horizontal state is arranged in the heating chamber 3. The heating unit 5 includes a flat heater 50 and a flat metal case 51 for heat dissipation that houses the flat heater 50. The planar heater 50 operates as heater heating means HI for heating the object to be heated. The metal case 51 is connected to the ground potential to form the first electrode of the HF heating means H2, and the surface of the metal case 51 functions as a reflector for reflecting microwaves. By enclosing the microwave between the table 4 as a mounting table on which the object to be heated is placed and the metal case 51 as a reflector, the microwave heating space M is defined in the microwave heating means H3. And functions as a preparation means for optimizing.

In other words, in the heating device of the present embodiment, the planar heater 50 is provided in the heating chamber 3 and is provided in the metal case 51 serving also as the first electrode, the microwave reflection plate, and the heating plate. A heater heating means H1 is constituted by a heating unit 5 provided with a heater unit, arms 6 1 and 6 2 serving as elevating means 6 for vertically supporting the heating unit 5 and a heater power supply (not shown). This realizes heater heating of the object to be heated placed on the surface.

Further, the HF heating means H2 includes a first electrode serving also as the metal case 51 of the heating unit 5, a second electrode 82 provided below the table 4, and 13.56. HF power supply 81 (not shown) for supplying high-frequency power of MHz. The microwave heating means H 3 is provided on the bottom of the heating chamber 3 and is connected to a magnetron (not shown) 91 for generating microwaves, a waveguide 92, and microwaves. A rotating waveguide 93 having a supply port, and configured to guide the microphone mouth wave generated by the magnetron 91 to the microphone mouth wave generation space M in the heating chamber 3.

In addition, this heating device uses a circulation fan heater disposed outside the partition wall 2 on the back of the heating chamber 3 to draw in the hot air from the inside of the chamber through the ventilation hole 2a for intake and to form the heating chamber 3 through the ventilation hole 2b for ventilation. And an even heating means H4 for supplying hot air to the inside and performing open heating by hot air. These heating means can be selected from simultaneous heating, independent heating, and sequential heating according to the object to be heated.

The heating chamber 3 is formed inside a box-shaped main body case 1 with an open front.The front of the main body case 1 has a translucent window 7a with a light-transmitting window 7a for opening and closing the outlet of the heated object of the heating chamber 3. Door 7 is provided. The opening and closing door 7 can be opened and closed in the up and down direction by having its lower end hinged to the lower edge of the main body case 1.By grasping the handle 7b mounted on the upper part and pulling it toward the front, Can be opened as shown in FIG. A predetermined heat insulating space is provided between the inner wall of the heating chamber 3 and the outer wall surface of the main body case 1, and the space is filled with a heat insulating material as needed. In particular, the space behind the heating chamber 3 is a circulation fan chamber that houses a circulation fan heater that stirs the atmosphere in the heating chamber 3 and a drive motor (not shown) for the heater. The wall is a partition wall 2 that defines a heating room 3 and a circulation fan room.

Further, as shown in FIG. 7, a partition wall 2 which is a rear wall of the heating chamber 3 has an intake ventilation hole 2a for taking in air from the heating chamber 3 side to the circulation fan chamber side, and a A ventilation hole 2b for blowing air to the heating chamber 3 side is provided to distinguish the formation area. Each hole is formed as a number of punch holes. The intake ventilation hole 2 a is formed at the center of the partition wall 2, and the ventilation ventilation hole 2 b is formed around the intake ventilation hole 2 a of the partition wall 2. The hot air in the refrigerator sucked from the intake ventilation holes 2a is heated by the heater and then exhausted into the refrigerator through the ventilation ventilation holes 2b.

The table 4 is for placing an object to be heated housed in the heating chamber 3 and is a rectangular ceramic dish of 3110 × 40.5 which covers the entire bottom portion of the main body case 1. FIG. 8 is a sectional view of the heating unit 5. As shown in FIG. 8, the heating unit 5 includes a metal case 51 and a planar heater 50 housed in the metal case 51, and the planar heater 50 is a coil formed by my force. It comprises a frame 52 and a coiled heating resistor 53 made of iron-chrome wire wound around the winding frame 52. An insulating plate 59S is inserted between the metal case 51 and the heating resistor 53 to prevent a short circuit between the metal case 51 and the heating resistor 53. Has become. The metal case 51 is formed by fitting a lid body 51 a having a convex portion at the center of the upper surface and the case body 51 b to form a hermetically sealed structure. It is designed to prevent this. The planar heater 50 is provided in the heating chamber 3 and is energized through a lead wire 54 connected to the heating resistor 53, so that the heating resistor 53 generates heat and is placed on the table 4. The heated object to be heated is heated. The winding frame 52 and the insulating plate 59S are made of a low-cost and highly heat-resistant my force, but may be made of a heat-resistant insulating material such as a ceramic or silicon-based plate.

A lead wire 54 is inserted through the inside of the arm 62 to supply power to the heater.

FIG. 9 is a perspective view of a winding frame 52 formed by winding a heating resistor 53. As shown in the figure, the winding frame 52 is a rectangular flat plate having a square opening at the center. The heating resistor 53 is radially wound around the winding frame 52 from the opening toward the outer edge of the winding frame 51, and both ends of the heating resistor 53 are connected to the Lee Byeon wire 54. -The flat heater 50 may be formed by storing a plate-like body having a planar meandering pattern as a heating resistor in the metal case 51. As a method of forming a planar meandering pattern, there is a method of sticking to a plate-like body or a method of forming the surface of the plate-like body by screen printing.

FIG. 10 is an enlarged view of the arms 61 and 62. FIG. As shown in FIG. 7 and FIG. 10, the arms 61 and 62 are rotatably connected to the side walls of the heating chamber 3 at the shaft portions 6 la and 62 a at both ends. The heating unit 5 is rotatably supported by arm holding portions 6 lb and 62 b provided near both edges of the upper surface of the unit 5. The arms 6 1, 6 2 are hollow metal tubes formed in a U-shape, and both ends thereof are substantially perpendicular to the surface parallel to the side wall of the heating chamber 3 so as to protrude upward. Bend, Further, it is bent so as to be perpendicular to this side wall, and is supported by the side wall of the heating chamber 3.

The arms 61 and 62 may be formed of a conductive material other than metal. In the case of a heating device having no HF heating function, that is, when it is not necessary to use the metal case 51 as the first electrode, the arms 61 and 62 may be formed of an insulating material.

The arm 6 2 is held by the arm holding portion 6 1 b, penetrates through the upper center of the metal case lid 5 1 a, and partially covers the lower portion of the arm 6 2 at a part covered by the lid 51 a. Is provided with an opening. A lead wire 54 connected to energize the heating resistor 53 of the flat heater 50 passes through the inside of the arm 62, and generates heat through the opening at the bottom of the arm 62. Connected to resistor 53. The arm 61 passes through the vicinity of the inner edge of the heating unit 5 and is supported by the side wall of the heating chamber 3. The arms 6 1 and 6 2 rotate so that the heating unit 5 can move up and down while maintaining a horizontal state.

Furthermore, the metal case 51 is in contact with the inner wall of the heating chamber via the arms 61 and 62, and by connecting the inner wall of the heating chamber to ground, it can be operated as the first electrode of the HF heating means H2. Has become.

FIG. 11 is a diagram illustrating a change in the position of the heating unit due to the rotation of the arm. The arms 6 1, 6 2 are:-The pivots of the shafts 6 1 a, 6 2 a-,-The distance between the U-shaped portions of the arms 6 1, 6 2 and the table 4 changes. The distance between the U-shaped part of the arm 61 and the table 4 and the distance between the U-shaped part of the arm 62 and the table 4 are equal. That is, since the heating unit 5 is rotatably supported by the arms 6 1 and 6 2 via the arm holding portions 6 lb and 6 2 b, the heating unit 5 always keeps the horizontal state and the shaft units 6 la and 6 2 a Rotation changes the distance from the table 4.

As described above, according to the heating device of the present embodiment, since the heating unit 5 can change its vertical position while maintaining a horizontal state, the heating unit (heat generating resistor 5 3 ) Can be installed close to each other, improving thermal efficiency. Further, the position of the heat generating portion can be adjusted according to the shape or composition of the heated object, and the heat generating portion can be arranged at an optimum position for each object to be heated. FIG. 12 is a diagram illustrating a schematic configuration including a driving unit of the heating device according to the present embodiment. In FIG. 12, the same reference numerals are given to components corresponding to the heating device shown in FIG. 7. In the heating device shown in FIG. 1, the heating unit 5 has temperature detecting means 501 for detecting the temperature of the object to be heated placed on the table 4, and based on the temperature detection result of the temperature detecting means 501. A control unit 502 that controls the height h (vertical position) and the amount of heat generated by the heating unit 5, and a driving unit that moves the heating unit 5 up and down based on instructions from the control unit 502. 503 and a power supply 504 for supplying power to the drive section 503. The temperature detecting means 501 is composed of, for example, a thermistor and an infrared sensor. Then, the temperature detecting means 501 detects the temperature of the article to be heated X during cooking, and the control section 502 controls the driving section 503 based on the detection result.

The power supply 504 drives the HF power supply 81, the magnetron 91, and the circulation fan heater of the oven heating means via the drive unit 503.

Next, a cooking operation using the heating device of the present embodiment will be described.

When using the heater-heating means H1 in this heating device, first, set an object to be cooked on the table 4, close the opening / closing door 7, and set the heater heating mode with the mode button provided on the front surface of the main body case 1. Select and select the desired cooking menu from the cooking menu on the display panel provided on the front of the case body.

For example, in the case of a menu such as gratin that the user wants to scorch, the ham is rotated and the heating unit 5 is lowered to a predetermined position.

When the cooking start button is pressed in this state, the flat heater 50 is driven, and the darill cooking is performed.

As described above, since the planar heater 50 is operated at the optimum position, it is possible to perform uniform and efficient heating over a large area.

When grill cooking is performed in the automatic mode, the temperature detecting means 501 detects the temperature of the object to be heated X being cooked at predetermined time intervals, and the control section 502 detects the temperature based on the detection result. The driving unit 503 is controlled. For example, when cooking whole ingredients such as chicken, if the initial temperature is low, the appropriate temperature may not be reached even after a certain period of time. In such a case, the temperature is detected by the temperature detecting means 501, The control unit 502 compares the measured value with the reference temperature, and when it is determined that the measured value is lower than the reference temperature by a predetermined value or more, the heating unit 5 is lowered, and the planar heater 50 is lowered. And bring it closer to the object to be heated.

If the temperature is higher than the standard temperature by heating by the flat heater 50, the measured value by the temperature detecting means 501 is compared with the reference temperature, and the measured value is When it is determined that the temperature is higher than the reference temperature by a predetermined value or more, the heating unit 5 is raised, the planar heater 50 is raised by a predetermined height, and the heating unit 5 is moved away from the object to be heated.

—In such cases, it may be possible to control not only the height of the planar heater but also the power of the heater.

When the measured value of the temperature is too high, not only the control of the planar heater 50 but also the setting of automatically driving other heating means such as the activation of the oven heating means H4 may be performed.

In addition, when the measured value of the temperature is too low, not only the control of the flat heater 50 but also the control of the circulation fan heater may be performed.

When using the microwave heating means H3 in this heating device, set the items to be cooked on the table 4, close the opening / closing door 7, and use the mode button provided on the front of the If the object to be heated is not particularly large, the position of the lower surface of the metal case 51 of the heating unit 5 is adjusted from the microwave supply port of the rotating waveguide 93 under the table 4. The arm is rotated to bring the heating unit down to the optimum distance, and set to the microwave heating position.

When the cooking start button is pressed in this state, the microwave generated by the magnetron 91 passes through the waveguide 92 and the rotating waveguide 93 connected to the waveguide and having a microwave supply port. The heating chamber 3 is supplied to the heating chamber 3, and the lower surface of the metal case is used as a reflection plate.

In this way, microwave cooking is performed in the optimal space for each menu, so it is possible to perform uniform heating over a large area. In the case of microwave heating, it has been found that by placing a reflector at a position that is a multiple of a quarter wavelength (η / 4), the matching characteristics of microwaves are improved, and microwaves are confined efficiently. I have. Therefore, by adjusting the position of the heating unit serving as the reflecting plate according to the state of the object to be cooked, the heating area can be adjusted to a desired size and without microwave leakage.

The optimal position is ideally η / 4λ (1 = 12 cm), but it depends on various conditions such as the position of each part in the room.

Therefore, for each cooking menu, a suitable position of the distribution characteristic and the power characteristic is determined in advance by experiment and stored in the control unit 502 composed of a microcomputer or the like, so that it is easily optimized. Operation can be performed.

Furthermore, when using the HF heating means H2 in this heating device, set the object to be cooked on the table 4, close the opening / closing door 7, and use the mode button provided on the front of the main body case 1 to perform the HF heating. When the mode is selected and the cooking target is selected in the cooking menu, the arm is rotated so that the position of the lower surface of the metal case of the heating tut 5 is at a desired position according to the cooking target, and the heating is performed. The unit is lowered and set to the optimal position for HF heating.

When the cooking start button is pressed in this state, the HF power supply 81 is connected between the first electrode composed of the metal case 51 and the second electrode 82 arranged below the table 4. -13. · 5 "6" ΜΉz high frequency power is applied, and the heated object on the table 4 is cooked by dielectric heating.

As described above, since the distance between the electrodes in the HF heating is adjusted to be an optimum distance, it is possible to perform uniform heating over a large area.

According to the present embodiment, the heating unit is used not only as a planar heating element but also as an electrode for HF heating and without having to introduce complicated components into the heating chamber. Since it is used as a reflector, it is possible to select the optimal radio wave distribution for each menu, and it is possible to perform highly efficient and uniform heating.

Further, in the case of heating with a heater, a planar heating portion by resistance heating is provided in the heating chamber. However, according to the present embodiment, since the heating unit is covered with a metal case, Not only does it not hinder microwave heating, but also actively works to optimize microwave heating. Although it is extremely difficult to remove dirt from the heater, this structure is covered with a metal case, so there is no contamination on the heater during heating, and only the metal case needs to be cleaned, so cleaning is easy. .

In addition, the planar heating portion is compact and can be approached to the object to be heated, so that the thermal efficiency can be improved. In addition, since the metal case is provided in the vicinity of the heating resistor, it plays the role of a heat conduction plate when heating the heater, making it possible to improve heat efficiency and heat distribution (uniformity). Become. Furthermore, even when performing HF heating using a metal case as the first electrode, the position of the first electrode can be adjusted, so that the position can be easily adjusted according to the type and size of the object to be cooked. Can be done.

When using this heating device, the heating unit 5 can be moved up and down as shown in Fig. 11 in any mode, and is placed on the front of the main unit case 1 in each mode. When the cooking method and the type of the object to be cooked are selected by the selected mode button (not shown), the heating unit is moved up and down according to the selected mode, and the cooking is carried out while being held at an appropriate position. You. It is also possible to adopt a usage form in which the horizontal position of the heating unit is changed during cooking.

In this heating device, as shown in Table 1 below,

1. Grill cooking of fish etc. using heater heating means H 1 only-

2. H F heating means Thawing cooking using only H2,

3. Microwave mouth-wave heating means Heat cooking using only H3,

4. Oven cooking of cakes etc. using only open heating means H4

In addition, it can be used for multifunctional cooking such as simultaneous cooking using two or more heating means at the same time and sequential cooking using two or more heating means sequentially as shown below. For example,

5. Optimum cooking for thawing and optimal thawing only cooking using microwave heating means H3 and HF heating means H2 simultaneously or sequentially (or alternately)

6. Optimum cooking for heating while improving the distribution of microphone mouth wave by using microwave heating means H3 and heater heating means H1 simultaneously or alternately 7. HF heating means H2, microwave heating means H3, and heater heating means H1 are sequentially driven to optimize cooking from thawing to baking (final heating using a circulation fan heater may be used. (Heating may not be necessary)

8. Optimum open and grill cooking with open heating means H4 and heater heating means H1 using circulation fan heater

There is.

The above four methods are typical composite cooking methods.

The term “alternate cooking” as used herein means not only a method in which the heater heating means HI is used periodically and a microphone mouth-wave heating means H 3 is interposed therebetween, but also means in which each heating means is used alternately, as well as frozen food. Use HF heating means H2 for the first few minutes, such as thawing heating, then use heater heating means H1 to complete cooking, etc. Say.

Always on: 〇

Sequential on: △

(table 1)

In the above, the heating apparatus including the heater heating means HI, the HF heating means H2, the microwave heating means H3, and the oven heating means H4 has been described. A heating device having only the means H1 may be used. If the functions mounted on the heating device are reduced, an inexpensive heating device can be provided. In the case of a heating device provided with only the heater heating means HI, the heater unit does not necessarily have to have a metal case, but may have a flat heater. For example, a planar heater may be used in which a part of the sheathed heater forms a flat portion and forms a flat shape.

(Third embodiment)

Hereinafter, with reference to FIGS. 13 to 17, another configuration example of the heating unit 5 will be described.

FIG. 13 (a) is a cross-sectional view of a heating unit configured to be able to store an arm in a metal case lid. The heating unit shown in the figure includes a metal case 56 and a planar heater 50 housed in the metal case 56. Also in this example, in order to prevent a short circuit between the metal case and the planar heater 50, a spacer S such as insulating my force or heat resistant rubber is interposed. If the metal case and the flat heater can be supported so as to maintain a predetermined interval, the spacer S is unnecessary, but the interposition ensures the short-circuit preventing effect. Also, instead of interposing an insulating plate entirely between the metal case and the flat heater, the spacer S is used in part to ensure insulation and to efficiently fulfill the role of a heat conductive plate. Can be. Further, by configuring the spacer S with an elastic body such as heat-resistant rubber, mechanical seed impact due to vertical movement is prevented, and the protection effect of the flat heater 50 is also improved. The configuration of the planar heater 50 is as described above. The metal case 56 is formed by fitting a lid body 56a having a recess formed by projecting both edges of the upper surface upward and a case body 56b. Further, the arm 63 is a hollow tube having a bent portion, and rotatably connects the side wall of the heating chamber 3 and the upright wall forming the recessed portion of the cover 56a. A lead wire 54 is inserted through the inside of the arm 63 to supply power to the heater.

According to this configuration, the arm 63 supported by the side wall of the heating chamber 3 is rotated, and the heating unit is placed in a horizontal position while the arm 63 is housed in the recess of the metal case lid 56a. It can be raised while maintaining its condition. In addition, this heating unit Can be accommodated in a concave portion formed on the top surface of the light emitting element. As a result, the effective volume in the heating chamber 3 increases, and the heating chamber 3 內 can be easily cleaned.

A ceramic member 56c may be attached to the surface of the heating unit shown in FIG. 13 (a) on the side of the object to be heated, as shown in FIG. 13 (b). As a result, a far-infrared effect can be obtained, and highly efficient heating can be realized. It also has the effect of making it difficult to get soiled when it comes into contact with food.

Further, as shown in FIG. 13 (c), one surface of the metal case may be replaced with a ceramic member 56c. In this case, a metal film 56M is formed on the outer surface of the ceramic member 56c. This metal film M can be easily formed by sputtering, plasma CVD, or the like. Further, gold foil or the like may be attached. This makes it possible to further reduce the weight of the heating unit. In addition, since the inner wall is made of an insulating material, the short-circuit prevention effect is also ensured.

(Fourth embodiment)

FIG. 14 shows another configuration example of the heating unit, and is a cross-sectional view of the heating unit in which a lead wire and an earth wire are passed through an arm. The heating unit shown in the figure includes a metal case 51 and a planar heater 50 housed in the metal case 51. The configurations of the metal case 51 and the planar heater 50 are as described above. An arm 62 is inserted from the side into the upper center of the metal lid 51 a. A lead wire 54 is inserted through the arm 62. Then, the power is supplied to the heater, and the ground wire 55 is inserted and connected to the upper inner wall of the lid 51a by welding or the like. The ground wire passes through the inside of the arm 62 and is connected to the heating chamber wall outside the heating chamber. According to this configuration, since the ground wire 55 connected to the heating chamber wall is passed through the arm 62 and connected to the upper inner wall of the lid 51 a, the inner wall of the heating chamber 3 is grounded. By doing so, the metal case 51 can be reliably set to the ground potential.

(Fifth embodiment)

FIG. 15 is a cross-sectional view of a heating unit for bringing a metal case and an arm into electrical contact. The heating unit shown in the figure is housed in a metal case 51 and a metal case 51. And a planar heater. The configurations of the metal case 51 and the planar heater 50 are as described above. At the center of the upper part of the metal case lid 51a, an arm 62 is inserted from the side, and the end of the inserted arm 62 is folded radially to electrically connect to the upper inner wall of the lid 51a. It is constituted so that it may contact. A lead wire 54 is passed through the inside of the arm 62 to supply power to the heater. The inner wall of the heating chamber is made of metal and is connected to ground (not shown). When the arm contacts a part of the inner wall of the heating chamber, the arm and the inner wall of the heating chamber are electrically connected. You.

According to this configuration, the arm 62 is connected to the inner wall of the heating chamber 3 connected to the ground potential, and the arm 62 and the metal case cover 51a are electrically contacted with each other. 51 can be at ground potential. However, processing of the metal case lid is required.

(Sixth embodiment)

FIG. 16 is a cross-sectional view of a heating unit having a different shape of the metal case. The heating unit shown in the figure includes a metal case 57 and a planar heater 50 housed in the metal case 57. The configuration of the planar heater 50 is as described above. The metal case 57 is formed by fitting the lid 57a and the case body 57b. Further, an arm 62 is inserted into a side surface of the metal case lid 5-7a. The lead wire 54 is inserted through the inside of the heater 62 to supply power to the heater.

(Seventh embodiment)

FIG. 17 is an exploded perspective view of a heating unit configured to sandwich a flat heater. The heating unit shown in the figure includes a flat heater 50, an insulating plate 59a located on the upper surface of the flat heater 50, an insulating plate 59b located on the lower surface, and an insulating plate 59a. It consists of a metal plate 58a located on the upper surface and a metal plate 58b located on the lower surface of the insulating plate 59b, and the metal plate 58a and the metal plate 58b are interposed between the insulating plate 5 and the metal plate 58b. 9a, 59b and the flat heater 50 are sandwiched and fitted. The configuration of the planar heater 50 is as described above. The metal plates 58a, 58b and the insulating plates 59a, 59b are rectangular flat plates, and the insulating plates 59a, 59b are made of a heat-resistant insulator such as my force. . The insulating plate 59a has a hole for passing the lead wire 54 near the center.

According to this configuration, since the insulating plate is interposed between the metal plate and the flat heater 50, it can be used for a high power type heater such as a flat heater used with a 20 OV power supply. There is no danger of short circuit.

The example in which the heating unit 5 is supported by the arms 61 and 62 has been described above. However, the heating unit 5 may be supported by another configuration so that the distance to the object to be heated can be adjusted. Hereinafter, specific examples will be described as the eighth to thirteenth embodiments.

(Eighth embodiment)

FIG. 18 is a front view of the heating device according to the eighth embodiment. The heating device shown in FIG. 18 is a device in which a flat heater is supported by a bellows-like tubular body as a lifting / lowering means and is raised / lowered. The bellows-like tubular body 20 connects the central portion of the top surface of the heating chamber 3 and the central portion of the heating unit 5 so that the heating unit 5 maintains a horizontal state. When the tubular body 20 expands and contracts, the heating unit 5 moves up and down, the distance between the heating unit 5 and the table 4 changes, and the distance to the object to be heated can be adjusted. The expansion and contraction of the tubular body 20 is driven by a motor (not shown).

A lead wire 21 for supplying electricity to the heating unit 5 is passed through the tubular body 20. According to this configuration, the heating unit 5 can be easily moved up and down by expanding and contracting the bellows-like tubular body 20.

Further, since there is no need to provide a support member on the inner side wall of the heating chamber 3, the effective volume can be increased. In this case, a uniform heating area approximately equal to the bottom area of the heating chamber 3 can be formed. Therefore, since there is no need to rotate the object to be heated, optimal heating can be realized uniformly over the entire surface of the rectangular top plate without a turntable. For example, when the present embodiment is applied to a large built-in type apparatus, simultaneous heating of two square pans, simultaneous cooking of 24 roll pans, gratin cooking of two square pans, Optimum heating cooking, such as roll cake and date winding, which was not possible in the past, becomes possible. Therefore, the amount that can be heated at a time is greatly increased as compared with the conventional cooking device. Furthermore, since the lead wire 21 is housed inside the tubular body 20, the amount of protrusions in the heating chamber 3 is reduced, so that it is possible to prevent spark from being generated even in the case of microwave heating. In addition, since the height of the heating unit 5 can be adjusted as required and the capacity of the heating chamber 3 can be adjusted, heat can be used efficiently, and high-speed and highly efficient heating and cooking can be performed. In addition, cleaning becomes easy because there are few irregularities inside the heating chamber.

In the second embodiment, the number of the temperature detecting means is one. However, if the temperature detecting means is provided at a plurality of locations, it is possible to eliminate the temperature variation on a plane and perform uniform heating. it can. When performing heating cooking using a square top plate, it is easy to adjust the temperature distribution in the plane if the flat heater is divided into multiple heaters and can be switched independently. .

(Ninth embodiment)

FIG. 19 is a front view of the heating device according to the ninth embodiment. The heating device shown in FIG. 19 supports a planar heater so as to be able to move up and down by a nested tubular body as an elevating means. The nested tubular body 22 connects the central portion of the top surface of the heating chamber 3 and the central portion of the heating unit 5 so that the heating unit 5 maintains a horizontal state. The expansion and contraction of the tubular body 23 changes the distance between the heating unit 5 and the tape 4 on which the object to be heated is placed. A lead wire 23 for supplying electricity to the flat heater 50 is inserted through the tubular body 22. The expansion and contraction of the nested tubular body 22 is driven by a motor (not shown).

According to this configuration, the heating unit 5 can be easily moved up and down by expanding and contracting the nested tubular body 22. Also, in this case, similarly to the third embodiment, since there is no need to provide a support member on the inner side wall of the heating chamber 3, the effective volume of the heating chamber 3 can be increased. Also in this case, a uniform heating area substantially equal to the bottom area of the heating chamber 3 can be formed, and uniform heating can be achieved over a large area as in the eighth embodiment. Furthermore, inside the tubular body 20 Since the lead wire 21 is stored in the heating chamber 3, the lead wire 21 is not exposed in the heating chamber 3, there is no unevenness, and cleaning becomes easy.

(Embodiment 10)

FIG. 20 is a front view of the heating device according to the tenth embodiment. The heating device shown in FIG. 20 supports the heating unit 5 so as to be able to ascend and descend by a wire 24 as elevating means. The wire 24 connects the central portion of the top surface of the heating chamber 3 and the central portion of the heating unit 5 so that the heating unit 5 maintains a horizontal state. By winding the wire 24, the distance between the heating unit 5 and the table 4 on which the object to be heated is placed is increased, and by loosening the wire 24, the distance is reduced. A lead wire 25 for energizing the flat heater 50 is wound around the wire 24.

According to this configuration, similarly to the eighth and ninth embodiments, it is not necessary to provide a support member on the inner side wall of the heating chamber 3, so that the effective volume of the heating chamber 3 can be increased. it can. Also in this case, a uniform heating area substantially equal to the bottom area of the heating chamber 3 can be formed, and uniform heating can be realized over a large area. Further, since the lead wire 25 is not exposed in the heating chamber, the heating chamber 3 has no irregularities, so that the effective volume is increased and the cleaning is facilitated.

(Eleventh Embodiment)

FIG. 21 is a front view of the heating device according to the eleventh embodiment. The heating device shown in FIG. 21 has one end rotatably supported and the other end supporting the heater unit with a slidable support member. One end of the supporting member 27 as the elevating means is rotatably supported in a vertical plane by a holding portion 26 provided on the top surface of the heating chamber 3, and the other end is connected to the heating unit. A sliding holding portion 28 provided on the upper surface of 5 is slidably and rotatably held in a vertical plane. Support member with holding part 26 as a fulcrum

By rotating 27, the angle between the support member 27 and the upper surface of the heating unit 5 changes, and as a result, the distance between the heating unit 5 and the table 4 changes, and the distance between the object to be heated and the object to be heated increases. Can be changed. The support member 27 has a flat heater. A lead wire 29 for energizing 50 is inserted. This lead wire 29 is connected to the heating resistor 53 using a slidable elastic connector while maintaining an electrical connection state. Thus, even when the support member 27 is displaced while sliding with respect to the slide holding portion 28, the electrical connection can be reliably maintained.

According to this heating device, as shown in FIG. 21, the distance h between the table 4 and the bottom surface of the heating unit 5 is changed by the rotation of the support member 27, and the length of the support member 27 is reduced! When the space between the top surface of the heating chamber 3 and the table 4 is H, and the angle between the support member 27 and the heating unit 5 is 0, the space h = H—r s i η Θ. When heating unit 5 is at the top, the interval h = H. On the other hand, when at the lowest position, h = H-r ε ΐ η θ = H-r.

As described above, according to the elevating means of the present embodiment, the adjustment range of the height of the heating unit can be widened with a simple configuration.

(First and second embodiments)

FIG. 22 is a front view of the heating device according to the 12th embodiment. The heating device shown in FIG. 22 supports the heater unit by a pantograph. The pantagraf is formed by connecting the pin-connected frames 35 and 36 with the pin-connected frames 37 and 38 so as to form a rhombus in part. A lead wire 40 for passing a current through the heating unit 5 is passed through 36. This heating device includes a holding portion 30 and a sliding portion 31 in an upper case 34 provided on an upper surface of the main body case 1, and a holding portion 32 and a sliding portion 3 on an upper surface of the heating unit 5. 3 is provided. The sliding part 31 is slidable with respect to the upper case 34. The sliding part 33 is fixed on the upper surface of the heating unit 5, and a frame 38 is attached to the sliding part 33. It is slidably held.

In this heating device, the upper end of the frame 35 is rotatably held by the holding portion 30, the upper end of the frame 37 is rotatably held by the sliding portion 31, and the lower end of the frame 36 is The holding portion 32 is rotatably held by the holding portion 32, and the lower end of the frame 38 is slidably and rotatably held by the sliding portion 33. In this heating device, when the sliding portion 31 is slid horizontally by the motor 39, the frames 35 and 35 are formed in the holding portions 30 and 32. The heating unit 5 moves up and down by rotating the frame 36 and sliding the frame 38 held by the sliding portion 33 via the pin connection.

According to this configuration, in addition to the effect of the heating device of the eighth to eleventh embodiments, the length of the lead wire is kept constant regardless of the position of the heating unit 5, so that the lead wire is wound. Eliminates the need for a scraping mechanism.

(Third Embodiment)

FIG. 23 is a front view of the heating device according to the thirteenth embodiment. The heating device shown in FIG. 23 supports the heating unit by a hook provided on a side wall in the heating chamber. The heating unit 5 has a connector 5a on the back side for connecting a heating resistor 53 and a lead wire (not shown) arranged in the partition wall 2. This connector 5 a is connected to a connector 41 with a lid provided on the partition wall 2 on the back side of the heating chamber 3. The connector 41 with a lid has five connector portions 4la, 41b, 41c, 4Id, and 41e, and each connector portion is covered when not in use. On both side walls of the heating chamber 3, hooks on which the heating tub 5 can be placed at the same height on the left and right are provided. In the heating device shown in FIG. 23, hooks 42, 43, and 44 are provided at three levels, that is, upper, middle, and lower, so that the heating unit 5 can be stepped to a desired height. It can be placed.

In this case, the heating unit must be moved manually, but by using this heating device, there is no need to add special lifting means, and the conventional parts can be used without significant design changes. There is an advantage that it can be formed.

When this connector with a lid is not used, each connector part is closed and not open, so that it can be used without contamination.

In addition, if a heat-resistant lead can be used, it can be connected to the power supply of the heating unit from one connector via the heat-resistant lead, and the second and eighth to 12th embodiments can be connected. The heating unit can be lifted and lowered by using lifting means.

Note that, in each of the above embodiments, four heating means of the heater heating means HI, the HF heating means H2, the microphone mouth wave heating means H3, and the open heating means H4 were used. Although the heating has been described, the metal case can also be used as a partition plate for adjusting the formation range of the steam region even when steam heating is used in combination. As for the open heating means H4, gas heating may be used instead of electricity. When the heating unit is used only for HF heating and microwave heating, it is only necessary to form a single metal plate so as to be electrically connectable. Containment is possible.

The heating unit may be formed so as to be detachable and detachable when not in use.

Furthermore, when the heating unit is used only for microwave heating, electrical connection is not required, and a single metal plate may be used.

In addition, it can be used effectively when multiple heating means such as a combination of heater heating means HI and microwave heating means H3, open heating means H4 and microwave heating means H3 are used simultaneously. Not even. The inner wall of the heating chamber is made of metal and connected to ground (not shown). When the arm contacts a part of the inner wall of the heating chamber, the arm and the inner wall of the heating chamber are electrically connected. Is performed.

In each of the above embodiments, a heating device for cooking food has been described. However, not only for cooking, but also for semiconductors such as a drying process for wood and the like, lifting of silicon, and heat treatment for semiconductors and heaters. It is needless to say that the present invention can also be applied to heating processes other than food, such as a wafer manufacturing process, a semiconductor processing process, and a mounting process such as solder reflow.

In particular, when handling large objects to be heated, it is easy to adjust the position of the heating unit without changing the height of the mounting means, even when heating while moving the mounting means. It is possible to carry out optimal heating in a short time, and the structure of the present invention is extremely effective. Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. This application is

Japanese Patent Application No. 2003-099080 filed on April 2, 2003,

S Patent application No. 2003-272334, filed on July 9, 2003,

Japanese Patent Application No. 2003-272335 filed on July 9, 2003

Japanese patent application No. 2003-272336 filed on July 9, 2003,

, The contents of which are incorporated herein by reference.

As described above, a highly reliable and high-performance device can be obtained with a compact shape comparable to a general-purpose microwave oven, and a space for storing the object to be heated is secured in a convenient volume. It is possible to provide a high-frequency heating apparatus that can be installed in a general household kitchen and that can be used in combination with dielectric heating and microwave heating.

Further, the heating device according to the present invention may be used as a cooking device, a drying device for wood and the like, a semiconductor wafer manufacturing device for pulling up silicon, a semiconductor wafer heating process, etc. It is also effective for heat treatment, and is particularly suitable for uniform and high-speed heating of objects to be heated having different sizes, materials, or initial temperatures.

Claims

The scope of the claims

1. Heating chamber and

Mounting means provided in the heating chamber, for mounting an object to be heated;

Heating means having a planar heat-generating portion provided in the heating chamber, wherein the heat-generating portion can adjust the distance to the object to be heated while maintaining a parallel state with respect to the mounting means. The heating device formed.

2. The heating device according to claim 1, wherein

The heating means,

The heating unit;

A heating unit comprising: an elevating means for elevating and lowering the heat generating unit while keeping the heat generating unit horizontal.

3. The heating device according to claim 1 or 2, wherein

The heating device, wherein the heating unit is housed in a top surface of the heating chamber.

4. The heating device according to any one of claims 1 to 3, wherein the heat generating section is configured to have an area of 50% or more of an area of a top surface of the heating chamber. Heating equipment.

5. The heating device according to any one of claims 1 to 4, wherein the heating unit is a flat heater including a heating resistor supported by an insulating plate. apparatus.

6. The heating device according to any one of claims 1 to 4, wherein the heat generating portion is a flat surface formed such that a part of the sheathed heater forms a meandering portion to form a flat shape. A heating device that is a shape heater.

7. The heating device according to any one of claims 2 to 6, wherein The elevating unit supports the heat generating unit, and is at least rotatable in the heating chamber.

It has one arm-shaped support member,

A heating device, wherein the heating unit can be moved up and down by rotating the support member.

8. The heating device according to claim 7, wherein

The heating device, wherein the heating unit is rotatable with respect to the support member.

9. The heating device according to any one of claims 1 to 6, wherein the elevating means supports the heat-generating portion, and is formed of a bellows-like tubular member that can expand and contract in the heating chamber. A heating device comprising a member.

10. The heating device according to any one of claims 7 to 9, wherein the support member accommodates a current-carrying wire to the heat-generating portion inside.

11. The heating device according to any one of claims 7 to 9, wherein the heating portion is configured to be capable of electrical connection via a connector disposed on an inner wall of the heating device. Heating equipment.

12. The heating device according to claim 11, wherein

A heating device, wherein the connector has a connection part formed so as to be able to move up and down, a lid part, and is protected by the lid part when not in use.

13. The heating device according to any one of claims 1 to 12, wherein at least a part of a surface of the heat generating portion is formed of a ceramic material.

14. The heating device according to any one of claims 1 to 13, wherein the heating unit includes a temperature detection unit that detects a temperature of the object to be heated. A heating device configured to move up and down the heating unit based on a temperature detection result of the temperature detection unit.

15. The heating device according to claim 14, wherein

The heat generation unit adjusts a heat generation amount based on a temperature detection result of the temperature detection unit.

16. The first and second electrodes provided in the heating chamber, and HF heating means for supplying a high-frequency voltage between the first and second electrodes and high-frequency heating the object to be heated, The electrode is a movable electrode installed above the object to be heated, the second electrode is a fixed electrode installed below the mounting table,

A plurality of substantially U-shaped support rods rotatably supporting the movable electrode,

The plurality of substantially U-shaped support bars are provided with rotation centers on the left and right walls of the heating chamber, and the lower sides of the plurality of substantially U-shaped support bars are rotatable while maintaining parallel to the fixed electrode. 2. The heating device according to claim 1, wherein the movable electrode is configured to be movable up and down while maintaining parallel to the fixed electrode.

17. The heating device according to claim 16, wherein the substantially U-shaped support rod is formed of a hollow circular conductor pipe.

18. The heating device according to claim 17, wherein the substantially U-shaped support rod, the movable electrode, and the heating chamber are electrically connected.

1 9. A microwave feed port provided on the bottom of the heating chamber for radiating microwaves into the heating chamber, a microwave generator for generating microwaves, and a microphone mouth wave generated by the microwave generator being connected to the microphone mouth. 17. The heating device according to claim 16, further comprising a waveguide for guiding to the microwave power supply port, wherein the heating device is configured to be capable of microwave heating.

20. The heating device according to claim 16, wherein a hot-air heater is provided on the back surface of the heating chamber, and the heater is capable of performing open heating.

21. The heating means is a heater heating means provided in the heating chamber and provided with a planar heating portion for heating the object to be heated by resistance heating.

First and second electrodes provided in the heating chamber, and HF heating means for supplying a high-frequency voltage between the first and second electrodes and heating the object to be heated by high-frequency,

2. The heating device according to claim 1, wherein said first electrode of said HF heating means is provided near said heat generating portion of said heater heating means.

22. The heating device according to claim 21, wherein

A heating device, wherein the first electrode and the heating section are integrally coupled to each other to form a heating unit.

23. The heating device according to claim 21 or 22, wherein the first electrode is a ground potential side electrode.

24. The heating device according to claim 22 or 23, further comprising a lifting means for lifting and lowering the heating tub.

25. The heating device according to claim 22, wherein

The heating unit can be stored in a top surface of the heating chamber-a heating device.

26. The heating device according to any one of claims 22 to 25, wherein the heating unit comprises: A planar heat generating portion housed in the case.

27. The heating device according to claim 26, wherein

The heating device according to claim 1, wherein the case is a metal case provided with a through portion for a power supply lead to the heat generating portion.

28. The heating device according to any one of claims 22 to 27, wherein the heating unit is joined to the heating unit via an electrically insulating member. A heating device, comprising: a conductive plate-shaped member; and the conductive plate-shaped member constituting the first electrode.

29. The heating device according to any one of claims 21 to 27, wherein the heat generating portion is shaped such that a part of the sheathed heater forms a meandering portion to form a planar shape. A heating device comprising an assembly of tube heaters, and a first electrode made of a conductive plate-like member joined to the tube heater so as to be in close contact with the tube heater.

30. The heating device according to any one of claims 22 to 29, wherein the heating unit is 50% or more of an area of a top surface of the heating chamber.

31. The heating device according to any one of claims 24 to 30, wherein the lifting / lowering means supports the heating unit and is rotatable in the heating chamber. A heating device including an arm-shaped support member.

32. The heating device according to any one of claims 24 to 30, wherein:-the elevating means is a support member made of a bellows-like tubular body that can expand and contract in the heating chamber- Heating device equipped with.

33. The heating device according to claim 31 or 32, wherein the support member accommodates an energizing wire to the heat generating portion inside.

34. The heating device according to claim 31 or 32, wherein the heat generating portion is configured to be capable of electrical connection via a connector provided on a wall of the heating chamber. Heating equipment.

35. The heating device according to claim 34, wherein A heating device, wherein the connector has a connection part formed so as to be able to move up and down, a lid part, and is protected by the lid part when not in use.

36. The heating device according to any one of claims 21 to 35, wherein the first electrode is electrically connected to an inner wall of the grounded heating chamber.

37. Microwave generating means for radiating microwaves into the heating chamber, and a reflecting member disposed to be movable up and down in the heating chamber and including a material that reflects the microwaves,

The reflection member is attached to a heating unit having the heating unit,

2. The heating device according to claim 1, wherein a size of a microwave space formed between the placing means and the reflection member is variable.

38. The heating apparatus according to claim 37, wherein the first and second electrodes provided in the heating chamber are supplied with a high-frequency voltage therebetween, and the object to be heated is provided. Equipped with HF heating means for heating the

The composite heating device, wherein the heating unit includes the first electrode.

39. The heating device according to claim 38, wherein

The heating device, wherein the first electrode is formed integrally with the heating section.

40. The heating device according to any one of claims 38 to 39, wherein the first electrode is a ground potential side electrode.

41. The heating device according to any one of claims 37 to 40, further comprising a lifting means for raising and lowering the heating unit.

42. The heating device according to any one of claims 37 to 41, wherein The heating unit can be stored in a top surface of the heating chamber.

43. The heating device according to any one of claims 38 to 42, wherein the heating cut has a microwave reflecting surface arranged in parallel with the placing means. A heating device, comprising: a case having a heat generating portion;

44. The heating device according to claim 43, wherein

The heating device, wherein the microwave reflecting surface is formed of a metal plate, and the metal plate forms the first electrode.

45. The heating device according to claim 43 or 44, wherein the case is a metal case provided with a through portion of a power supply lead to the heat generating portion. .

46. The heating device according to any one of claims 38 to 42, wherein the heating unit is joined to the heat generating portion via an electrically insulating member. A heating device comprising: a conductive plate-shaped member; and the conductive plate-shaped member constituting the first electrode.

47. The heating device according to any one of claims 37 to 42, wherein the heat generating portion is shaped such that a part of the sheathed heater forms a meandering portion to form a planar shape. A heating device comprising: an assembled tube heater; and a first electrode made of a conductive plate joined to the tube heater so as to be in close contact with the tube heater.

48. The heating device according to any one of claims 37 to 47, wherein the heating unit is 50% or more of an area of a top surface of the heating chamber. Heating equipment.

49. The heating device according to any one of claims 41 to 48, wherein the elevating means supports the heating unit, and is rotatable in the heating chamber. A heating device comprising: an arm-shaped support member.

50. The heating device according to any one of claims 41 to 48, wherein the elevating means includes a support member formed of a bellows-like tubular body that can expand and contract in the heating chamber. A heating device.

51. The heating device according to claim 49 or 50, wherein the support member accommodates therein an energizing wire to the planar heating portion. .

52. The heating device according to claim 49 or 50, wherein the heat generating portion is configured to be capable of electrical connection via a connector disposed on a wall of the heating chamber. A heating device.

53. The heating device according to claim 52, wherein

The heating device is characterized in that the connector has a connection part formed so as to be able to move up and down, a lid part, and a protection by the front neck self-lid part when not in use.

54. The heating apparatus according to any one of claims 38 to 53, wherein the first electrode is in electrical contact with an inner wall of the grounded heating chamber. Characterized heating device.