JP2007321994A - High frequency heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem with a conventional high frequency heating device, in which, as a heating chamber is filled with steam, a large amount of moisture condensate is generated in the heating chamber after heating, and the moisture condensate drops on a floor surface outside of the device when the amount of steam is particularly much. <P>SOLUTION: A humidity absorbing material layer 52 absorbing the steam supplied to a heated object in the heating chamber 1 is disposed to allow the steam to be absorbed by the humidity absorbing material layer 52. Thus excess steam is absorbed and held by the humidity absorbing material layer, and the water held in the humidity absorbing material layer is heated without forcing a user to perform maintenance, thus the steam can be generated with smaller energy. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a countermeasure for dew condensation of water vapor introduced during cooking and water vapor generated from an object to be heated in a high-frequency heating device.

  Conventionally, a high-frequency heating apparatus provided with high-frequency generating means for outputting a high frequency in a heating chamber that accommodates an object to be heated can efficiently heat the object to be heated in the heating chamber in a short time. It rapidly spread as a microwave oven as a cooking device. In microwave ovens, etc., in order to achieve more delicious cooking, water vapor is filled into the heating chamber to prevent drying of the heated object by heating, or by supplying moisture to the heated object, Developments such as improving the efficiency, making the temperature in the heating chamber uniform by the latent heat of water vapor, and shortening the cooking time are generally performed, and these are generally called high-frequency heating devices with a steam generation function Yes.

  However, as compared with the conventional high-frequency heating device, water vapor fills the heating chamber, so that condensation occurs in the heating chamber after heating. Therefore, the user was performing the operation | work which wipes off the dew condensation water in a warehouse every time after the heating using steam. Also, if the door is left closed without wiping away the condensed water, the wall surface of the heating chamber will continue to be wet. There was also a complaint that the next time the door was opened, it was unsanitary or the device would be damaged.

The following have been proposed as solutions for such problems. That is, as shown in FIG. 5, this high-frequency heating device is a water droplet receiver that prevents water vapor generated in the heating chamber 80 from condensing on the lower front surface of the main body of the high-frequency heating device, and preventing water droplets adhering to the door from dropping on the floor. A portion 81 is provided, the water droplet receiving portion 81 is provided with a concave groove for receiving water droplets, and is configured to be detachable from the main body of the high frequency heating device, and the water droplet receiving portion 81 has a flow velocity that reduces the flow velocity of water in the longitudinal direction. A mitigation means was provided to prevent the problem of degrading the quality of condensed water dripping onto the floor surface. This high-frequency heating device can remove the water drop receiver 81 so that condensed water and debris can be easily removed, and the water drop receiver 81 can be attached and detached to prevent water spilling due to shaking or tilting of the water drop receiver when carrying it. It has the effect that it can be performed (for example, refer patent document 1).
JP 2005-127622 A

  However, in the high-frequency heating device in Patent Document 1, the generated water vapor condenses on the wall surface of the heating chamber, and when water droplets aggregate and gradually increase, they flow out in the direction of gravity against the surface tension and frictional force. These condensed water accumulates on the bottom surface along the wall surface of the heating chamber and can accumulate, or the water that flows out along the wall surface of the front door may drop on the floor surface outside the device from the gap of the door. . Furthermore, when water accumulates on the bottom surface, it drops from the gap of the door onto the floor surface outside the apparatus.

  In addition, it is necessary to dispose of the condensed water by wiping it off, which is troublesome and is not preferable from the viewpoint of thermal efficiency.

The present invention solves the above-mentioned conventional problems, and the user does not need to perform the work of wiping off the condensed water in the warehouse every time after heating using steam, and the next work can be performed without performing the work. It is an object of the present invention to provide a high-frequency heating device that is improved in thermal efficiency with respect to steam generation without being unsanitary when the door is opened or being damaged.

  In order to solve the above-described conventional problems, a high-frequency heating device according to the present invention includes a heating chamber that houses and heats an object to be heated, a steam generation unit that generates steam to be supplied to the heating chamber, and a micro chamber in the heating chamber. Microwave generating means for irradiating waves, a steam hole for discharging steam in the heating chamber, an on-off valve for opening and closing the steam hole, a hygroscopic material layer for condensing and holding the steam in the heating chamber, Hygroscopic material layer heating means for heating the hygroscopic material layer when the vapor hole is closed, and control means for controlling the at least hygroscopic material layer heating means.

  As in the above invention, by condensing the water vapor in the heating chamber and holding it in the hygroscopic material layer, a large amount of condensed water accumulates on the bottom surface in the heating chamber as in the past, and the floor surface outside the apparatus etc. from the gap of the door It is possible to prevent water from being dripped into the water, and it is possible to generate water vapor with less energy by heating the water retained in the hygroscopic material layer.

  Therefore, it is possible to provide a high-frequency heating device with high water vapor generation efficiency without forcing the user to perform laborious work.

  The high-frequency heating device of the present invention allows the user to take care of the user by allowing the water vapor supplied to the object to be heated to be adsorbed and held on the hygroscopic material layer without condensation on the wall surface or the like thereafter. By heating the water held in the hygroscopic material layer without being strong, water vapor can be generated with less energy.

  The first invention includes a heating chamber for storing and heating an object to be heated, a steam generating means for generating water vapor to be supplied to the heating chamber, a microwave generating means for irradiating microwaves in the heating chamber, and the heating A steam hole for discharging indoor steam, an on-off valve for opening and closing the steam hole, a hygroscopic material layer for condensing and holding steam in the heating chamber, and the hygroscopic material layer when the steam hole is closed A high-frequency heating device having a hygroscopic material layer heating means for heating the hygroscopic material layer and at least a control means for controlling the hygroscopic material layer heating means to condense the vapor in the heating chamber into the hygroscopic material layer. By holding, it is possible to prevent a large amount of dew condensation water from accumulating on the bottom surface in the heating chamber as in the past and dripping from the gap of the door onto the floor surface outside the apparatus. Further, by heating the water retained in the hygroscopic material layer to generate water vapor, water vapor can be generated with less energy.

  For example, when cooking an object to be heated on a grill, first apply a large amount of water vapor to the object to be heated by the steam generating means, moisten the inside with a microwave or heater, and then baked the surface with a microwave or a heater. It can be cooked with a combination of water vapor generated from the layer and moist finish.

  As described above, it is possible to provide a high-frequency heating device with high steam generation efficiency without forcing the user to perform laborious work.

  In a second aspect of the invention, in particular, in the first aspect of the invention, a detachable mounting tray on which an object to be heated is mounted and disposed at a predetermined interval above the bottom surface of the heating chamber to divide the space in the heating chamber, and steam By using a high-frequency heating device provided with steam transfer means for supplying the steam generated by the generating means into the heating chamber space above the mounting plate, the space in the heating chamber used for cooking is narrowed, Without increasing the heating capability such as increasing the output, the rate of temperature rise in the heating chamber due to heating can be increased.

  In the third invention, in particular, in the first or second invention, the object to be heated is moistened by using a high-frequency heating device in which the amount of water vapor introduced into the heating chamber is changed according to the type of the object to be heated. Since the amount of water vapor introduced into the heating chamber is changed depending on whether or not it is necessary to perform heating, optimum cooking can be performed in accordance with the properties of the object to be heated. The amount of water vapor can be controlled by the volume of the steam generating means and the hygroscopic material layer, and the time for supplying water vapor.

  In the fourth invention, in particular, the mounting dish of the second invention is a high-frequency heating device made of a ceramic material or a heat-resistant resin material that transmits microwaves, thereby increasing the temperature rise rate in the heating chamber due to water vapor. At the same time, because it can be cooked using microwaves, it is possible to minimize the drying of the object to be heated by microwaves by performing uniform heating without temperature unevenness by using microwaves. Since it is heated evenly after being added to the water, it can be cooked quickly in a good finished state.

  According to a fifth aspect of the invention, in particular, the mounting dish of the second aspect of the invention is a high-frequency heating device made of a metal that reflects microwaves. When the condensed water in the heating chamber is heated and evaporated using a wave, it is possible to perform cooking with good finish without causing the microwave to reach the object to be heated and adversely affecting the finish.

  According to a sixth aspect of the present invention, in particular, in the fourth or fifth aspect of the invention, a high-frequency heating device in which a member that absorbs microwaves and generates heat is provided on the mounting tray, so that the object to be heated is placed in advance before heating. By providing a preheating process to heat the dish and raising the atmospheric temperature in the heating chamber, the heated object is heated with water vapor, making it difficult for water vapor to condense on the wall surface of the heating chamber and improving the heating efficiency of the heated object In addition, the object to be heated can be burnt by heating from the lower side by heat conduction, and cooking with a good finish can be performed according to the type of object to be heated.

  The seventh invention is a high-frequency heating device in which an upper heater is provided above the heating chamber, particularly as a preheating means in the heating chamber in the second invention, so that the placing plate is pre-heated before heating the object to be heated. By providing a preheating step for heating the heating chamber and raising the atmospheric temperature in the heating chamber and then heating the object to be heated with water vapor, it becomes difficult for water vapor to condense on the wall surface of the heating chamber, and the heating efficiency of the object to be heated is increased. In addition, the object to be heated can be burnt by heating the object to be heated from above and below, and cooking with a good finished state can be performed according to the type of object to be heated.

  According to an eighth aspect of the invention, in particular, the hygroscopic material layer of the first aspect of the invention is a high-frequency heating device having at least one of hygroscopic fibers, hygroscopic resins, zeolite, silica gel, and activated alumina, thereby absorbing and desorbing moisture. The performance can be increased.

  According to a ninth aspect of the invention, in particular, the hygroscopic material layer of the first aspect of the invention is a high-frequency heating device to which a substance having a deodorizing function is added, thereby absorbing and removing the cooking odor generated during cooking, thereby absorbing moisture. Odor generation when the functional material layer is heated can be suppressed.

  According to a tenth aspect of the invention, in particular, the hygroscopic material layer of the first aspect of the invention is a high-frequency heating device in which a hygroscopic material is formed on the surface of a base material capable of generating heat, so that the base material is directly removed when moisture is desorbed. By directly heating the hygroscopic material layer formed on the surface of the substrate by generating heat, the heat conduction characteristics with respect to the hygroscopic material can be improved, and the moisture adsorption / desorption amount and efficiency can be increased.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a cross-sectional view of a high-frequency heating device according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the heating chamber 1 is closed by radio waves by each wall surface formed of a metal material, and a heated object storage space 2 for storing an object to be heated is formed in the heating chamber 1. Yes. A placing plate 3 made of a non-conductive material on which the article to be heated is placed is disposed on the bottom surface of the article to be heated storage space 2. A radiation antenna 5 that radiates microwaves is disposed below the mounting plate 3 at a substantially central portion of the bottom wall surface 4 that forms the heating chamber 1. The radiating antenna 5 is disposed on the end side of a waveguide 6 that transmits microwaves, and a magnetron 7 that is a microwave generating means for generating microwaves is provided on the other end side of the waveguide 6.

  Further, a steam generating means 8 is disposed at the left bottom of the heating chamber 1. The steam generating means 8 includes a water reservoir recess 9, a water heating means 10 for heating the water reservoir recess 9 from below, and a water reservoir recess temperature detecting means 11 for detecting the temperature of the water reservoir recess 9. Further, the water storage tank 12 and a pump 15 for supplying water from the water storage tank 12 to the water reservoir recess 9 through the water supply pipe 13 and the water supply port 14 are provided.

  In addition, a plurality of steam flow opening portions 20 and 21 are arranged on the left side surface of the heating chamber 1. The plurality of steam flow opening portions 20 and 21 are connected to each other through the connecting means 22 outside the heating chamber 1. The steam flow opening portion 20 which is at least one of the plurality of opening portions is an intake port for taking in the water vapor generated by the steam generating means 8, and one steam flow opening portion 21 is In addition, the air outlet is a blowout port that blows out the water vapor that has flowed through the connecting means 22 into the heating chamber 1.

  Further, a steam flow means 23 is provided in order to allow the water vapor generated by the steam generation means 8 to flow through the steam flow opening 20. The steam flow means 23 includes a steam lid 24 and a packing 25 made of an elastic material provided on the periphery thereof. The steam flow means 23 has a shape having a space 26 for connecting the steam generation means 8 and the steam flow opening 20 inside thereof, and is detachably mounted at a predetermined position in the heating chamber 1 so that the water vapor is received. I try not to leak.

  Further, the mounting tray 30 detachably attached to the heating chamber 1 is housed in the heated object storage space 2 to form a small heating space 31 above the mounting tray 30. The mounting tray 30 is made of a material that transmits microwaves. Further, the steam flow opening portion 21 is arranged so as to blow water vapor into the small heating space 31. A planar heater 32 is provided on the upper wall surface of the heating chamber 1. In addition, support portions 33 and 34 for supporting the mounting plate 30 are arranged on the side wall surface of the heating chamber 1 so that the heating chamber 1 is adjusted to 1/2 and 1/3 capacity as the small heating space 31. I have to.

  The radiation antenna 5 is driven to rotate by a motor 40. Further, a temperature detecting means 41 for detecting the temperature in the heated object storage space 2, and an infrared detecting means 43 for detecting the surface temperature by detecting the amount of infrared rays emitted from the surface of the heated object through the transmission hole 42, and Is provided. In addition to the temperature detection means 41 and the infrared detection means 43, the detection means related to the heating information sensing for effectively performing the heating control can be accompanied by a means for detecting the humidity in the heating chamber 1 and the like.

  The upper part of the heating chamber has a steam hole 51 communicating with the heating chamber 1, a hygroscopic material layer 52, and a steam hole 53 communicating with the outside of the heating apparatus main body. 55 is provided. The heater 32 has a role of radiatively heating the inside of the heating chamber 1 and conductively heating the hygroscopic material layer 52. The on-off valve 55 moves in the vertical direction by changing the polarity of the lower magnet 56 based on a signal from the control means described later, and opens and closes the steam hole 53. The hygroscopic material layer 52 has zeolite supported on a ceramic honeycomb and is fixed to the upper portion of the heater 32.

  Further, the control means 60 is based on an operation input signal from an operation section (not shown) or a signal from each detection means, and water heating that is a heating means for the magnetron 7 that is the microwave generation means and the steam generation means 8. The operation of the means 10, the on-off valve 55 that is a means for introducing water vapor into the hygroscopic material layer 52, the heater 32 that is a heating means for generating water vapor from the hygroscopic material layer 52, and the like is controlled to control the water vapor into the heating chamber 1. Supply. Heating conditions, control conditions, and the like are temporarily or permanently stored in storage means (integrated with the control means). The operation unit includes a display unit, an automatic heating operation key, a manual heating setting key, a heating start key, and the like.

  The heating cooking method of the high frequency heating device in Embodiment 1 of the present invention configured as described above will be described.

  When the user commands the control means 60 by the operation from the operation unit to the object to be heated and the heating condition suitable for the menu, the mounting plate 3 of the object to be heated storage space 2 or the small heating space 31 is provided. The heating of the object to be heated placed on the placing tray 30 is started. The control means 60 starts controlling the operations of the magnetron 7 and the water heating means 10 that are the microwave generation means according to the heating conditions.

  When the cooled object to be heated is reheated, the control means 60 first energizes the water heating means 10 and simultaneously receives the detection signal of the infrared detection means 43, and differs from the ambient temperature by the detection signal of the infrared detection means 43. Detects that there is an object to be heated in the temperature range. Furthermore, energization of the water heating means 10 is continued until the water in the steam generating means 8 reaches 100 ° C. in response to a signal from the water reservoir recess temperature detecting means 11. When the steam generated by the steam generating means 8 fills the space 26 and the steam pressure gradually rises, the steam flow opening part 20 passes through the connecting means 22 and the steam flow opening part 21 performs small heating. It is blown out into the space 31. The shape and angle of the steam flow opening 21 are optimally designed so that the steam that blows out preferentially strikes the object to be heated. The steam generating means 8 can vary the amount of generated steam according to the amount of water supplied by the operation of the water heating means 10 or the operation of the pump 15.

  If all of the water in the water reservoir recess 9 evaporates, the temperature of the water reservoir recess 9 exceeds a predetermined temperature, and the water reservoir recess temperature detection means 11 detects that the temperature of the water reservoir recess 9 exceeds a predetermined temperature, and the water heating means 10 is turned off.

  A predetermined amount of water vapor is introduced into the heating chamber 1 in accordance with the object to be heated, but when the amount of water vapor to be introduced is large, the air in the object to be heated storage space 2 or the small heating space 31 is saturated and heated. Condensation will form on the walls of the room. Therefore, the on-off valve 54 is opened in order to discharge the water vapor in the heating chamber 1 to the outside according to the volume of the space into which the water vapor is introduced and the introduction time, and the water vapor flowing from the vapor hole 51 is condensed into the hygroscopic material layer 52. Hold. After a certain period of time, the water that can be held in the hygroscopic material layer 52 becomes saturated, and beyond that, it is discharged outside the heating device, but the hygroscopic material layer 52 only holds the amount of water vapor necessary for general cooking. Having a volume of If it is necessary to further wet the object to be heated, the energization to the water heating means 10 is stopped, the on-off valve 54 is closed and the heater 32 is energized at the same time, and is held by the hygroscopic material layer 52. Water is evaporated to generate water vapor. The generated water vapor is introduced into the heating chamber 1 from the vapor hole 51. At this time, the hygroscopic material layer 52 has an effect of animal heat due to heat of adsorption and the like, and the temperature is relatively high (about 50 ° C.). Therefore, the evaporation of water from the hygroscopic material layer 52 takes less energy than usual. It becomes possible.

FIG. 2 compares the amount of dew condensation in the heating chamber when the chilled meat steamer is cooked with steam in the heating device according to the conventional example and the present embodiment. The amount of steam input was the same for both the conventional example and this embodiment. As shown in FIG. 2, in the heating device in the present embodiment, the amount of condensation decreased to about 1/7 as compared with the conventional example.

  FIG. 3 is a comparison of the amount of power consumed when a frozen meat bun is cooked with steam generated from the steam generating means 8 and the hygroscopic material layer 52 in the heating apparatus according to the conventional example and the present embodiment. The amount of steam input was the same for both the conventional example and this embodiment. As shown in FIG. 3, in the heating device in the present embodiment, the power consumption is reduced to about 2/3 as compared with the conventional example.

  As described above, in the heating device in the present embodiment, it is possible to prevent a large amount of condensed water from being accumulated on the bottom surface of the heating chamber and dripping from the gap of the door onto the floor surface outside the device, etc. By alternately generating water vapor from the vapor generating means 8 and the hygroscopic material layer 52, it is possible to generate water vapor with less energy.

  Further, the use of a hygroscopic material has an effect of reducing moisture evaporation from the surface of the object to be heated and reducing energy loss at the time of drying and cooking by the retention and moisture of the animal. In this embodiment, zeolite is supported on a ceramic honeycomb to form a hygroscopic material layer. However, the hygroscopic amount can be secured even by using hygroscopic fibers, hygroscopic resin, silica gel, and activated alumina. For example, a hygroscopic resin may be used when the amount of moisture absorption is more important, and a ceramic honeycomb such as zeolite or silica gel may be supported on the ceramic honeycomb when the animal heat is also important. Moreover, you may use combining both.

  Further, by adding a hygroscopic material and a material having a deodorizing action such as activated carbon to the hygroscopic material layer 52, or a substance having a deodorizing action in the hygroscopic material itself, for example, a chemical fiber containing activated carbon, a cooking odor is obtained. Can be removed.

  In the present embodiment, the hygroscopic material layer 52 is fixed to the upper portion of the heater 32. However, by making the base material of the hygroscopic material layer a metal capable of generating heat, the base material directly generates heat and is applied to the surface of the base material. By directly heating the formed hygroscopic material layer, the heat conduction characteristics are improved, and the moisture absorption / desorption amount and the thermal efficiency can be increased.

  Further, if the heater 32 is energized for a certain period of time before the steam is blown out to the heated object storage space 2 or the small heating space 31, the condensation of the steam on the top surface of the heating chamber can be suppressed / prevented. .

  The mounting tray 30 is made of a metal that reflects microwaves, so that the temperature rise rate in the heating chamber due to water vapor can be increased, and at the same time, condensed water in the heating chamber is heated and evaporated using the microwaves. In this case, it is possible to perform cooking with good finish without causing the microwave to reach the object to be heated and adversely affecting the finish.

(Embodiment 2)
FIG. 4 shows a cross-sectional view of the high-frequency heating device according to Embodiment 2 of the present invention. The same elements as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The high-frequency heating device in the present embodiment is different from the first embodiment in the configuration of the mounting tray. As shown in the drawing, the mounting tray 70 is stored in the heated object storage space 2 to form a small heating space 31 above the mounting tray 70. The mounting tray 70 is made of a ceramic whose surface is coated with a fluororesin, and has a configuration in which a heating element 71 that absorbs microwaves and generates heat is formed on the bottom surface, and the heating object 71 puts the object to be heated on the mounting tray 70. Can be cooked. The heating element 71 is composed of a porous sintered body based on silicon carbide, titanium oxide, graphite, activated carbon or the like. As the heat generation characteristics, for example, a temperature of about 250 ° C. or more is reached by irradiating with microwave power of 500 W for 2 minutes.

  The operation of the high-frequency heating device according to Embodiment 2 of the present invention configured as described above will be described.

  When grilling the object to be heated, the control means 60 first energizes the magnetron 7, the water heating means 10 and the heater 32 and simultaneously captures the detection signal of the infrared detection means 42. It detects that there is an object to be heated in a temperature range different from the temperature. Furthermore, energization of the water heating means 10 is continued until the water in the steam generating means 8 reaches 100 ° C. in response to a signal from the water reservoir recess temperature detecting means 11. The heating element 71 is heated by the microwave and the temperature of the mounting plate 70 is increased, and the temperature of the upper wall surface of the small heating space 31 is increased by the heater 32. Eventually, when the steam generated by the steam generating means 8 fills the space 26 and the steam pressure gradually increases, from the steam flow opening part 21 through the connection means 22 from the steam flow opening part 20. The small heating space 31 is charged. The introduced steam wets the article to be heated, and when a certain time has passed, the energization of the water heating means 10 is stopped and the generation of steam stops. At this time, the on-off valve 54 is opened in order to discharge the water vapor in the heating chamber 1 to the outside according to the volume of the space into which the water vapor is supplied and the charging time, and the water flowing from the vapor hole 51 is transferred to the hygroscopic material layer 52. Hold condensed. Eventually, the temperature of the upper wall surface of the mounting plate 70 and the small heating space 31 rises to about 200 to 300 ° C., and the object to be heated is baked from above and below. At this time, since the hygroscopic material layer 52 is also heated, the water vapor generated by evaporation of the retained water is introduced into the heating chamber 1 from the vapor hole 51. Therefore, the to-be-heated material is moderately dried, and the surface is baked crisply so that cooking with good finish can be performed.

  Therefore, it is possible to prevent a large amount of condensed water from accumulating on the bottom surface of the heating chamber and dripping onto the floor surface outside the apparatus from the gap of the door as in the past, and generate steam with less energy. In addition, it is possible to perform cooking with a better finished state than before.

  As described above, the high-frequency heating device according to the present invention is configured such that the water vapor supplied into the heating chamber is held on the moisture absorbent before the water vapor is condensed on the wall surface or the like, so that the dew condensation water flows from the gap of the door to the floor surface outside the device. In addition to preventing dripping on the user, it is possible to eliminate unnecessary effort from the user, and by generating water vapor by heating the water held in the hygroscopic material, water vapor can be generated with less energy. Therefore, it is useful as a cooking device of a cooking apparatus combined with a microwave oven, an oven range, an oven or a griller to which steam is added.

Sectional drawing of the high frequency heating apparatus in Embodiment 1 of this invention Condensation comparison diagram comparing the amount of condensation in the heating chamber when cooking with steam in the high-frequency heating device of the first embodiment Power consumption comparison diagram comparing power consumption when cooking with steam in the high-frequency heating apparatus of the first embodiment Sectional drawing of the high frequency heating apparatus in Embodiment 2 of this invention Sectional view of a conventional high-frequency heating device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating chamber 2 Space to be heated storage 3 Mounting plate 4 Bottom wall surface 5 Radiating antenna 6 Waveguide 7 Magnetron (microwave generating means)
DESCRIPTION OF SYMBOLS 8 Steam generating means 9 Water reservoir recessed part 10 Water heating means 11 Water reservoir recessed part temperature detection means 12 Water storage tank 13 Water supply pipe 14 Water supply port 15 Pump 20 Steam flow opening part 21 Steam flow opening part 22 Connection means 23 Steam flow means 24 Steam lid 25 Packing 26 Space 30, 70 Placement plate 31 Small heating space 32 Heater (hygroscopic material layer heating means)
33, 34 Support section 40 Motor 41 Temperature detection means 42 Transmission hole 43 Infrared detection means 51 Vapor hole 52 Hygroscopic material layer 53 Vapor hole 54 Upper magnet 55 On-off valve 56 Lower magnet 60 Control means 71 Heating element

Claims (10)

A heating chamber for storing and heating an object to be heated, steam generating means for supplying water vapor to the heating chamber, microwave generating means for irradiating the heating chamber with microwaves, and a steam hole for discharging steam in the heating chamber An on-off valve that opens and closes the vapor hole, a hygroscopic material layer that condenses and holds the vapor in the heating chamber, and a hygroscopic material layer heating that heats the hygroscopic material layer when the vapor hole is closed And a high-frequency heating apparatus comprising control means for controlling the at least hygroscopic material layer heating means. A detachable mounting tray on which an object to be heated is placed and arranged above the bottom surface of the heating chamber by a predetermined distance to divide the space in the heating chamber, and water vapor generated by the steam generating means from the mounting tray described above The high-frequency heating device according to claim 1, further comprising a vapor transfer unit that supplies the upper heating chamber space. The high-frequency heating device according to claim 1 or 2, wherein the amount of water vapor introduced into the heating chamber is changed in accordance with the type of the object to be heated. The high-frequency heating device according to claim 2, wherein the mounting dish is made of a ceramic material or a heat-resistant resin material that transmits microwaves. The high-frequency heating device according to claim 2, wherein the mounting dish is made of a metal that reflects microwaves. The high-frequency heating device according to claim 4 or 5, wherein a member that generates heat by absorbing microwaves is provided on the mounting tray. The high frequency heating apparatus according to claim 2, wherein an upper heater is provided above the heating chamber as preheating means in the heating chamber. The high-frequency heating device according to claim 1, wherein the hygroscopic material layer includes at least one of hygroscopic fibers, hygroscopic resin, zeolite, silica gel, and activated alumina. The high-frequency heating device according to claim 1, wherein the hygroscopic material layer is added with a substance having a deodorizing function. The high-frequency heating device according to claim 1, wherein the hygroscopic material layer is formed by forming a hygroscopic material on a surface of a base material capable of generating heat.