JP2004044993A - High-frequency heating device with steam generating function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-frequency heating device capable of easily cleaning a steam generating part to keep its sanitation, performing proper heating treatment by accurately measuring a temperature of a heated matter, and improving the heating efficiency. <P>SOLUTION: This high-frequency heating device with steam generating function, supplying at least one of high frequency and steam to a heating chamber 11 accommodating the heated matter to perform the heating treatment on the heated matter, comprises a high-frequency generating part 13, a steam generating part 15 generating the steam in the heating chamber 11, and a circulating fan 17 stirring the air in the heating chamber 11. An indoor air heater 19 is mounted for heating the air circulating in the heating chamber 11, and the steam generating part 15 generates the steam by heating an evaporating tray 35 having a water reserving recessed part. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a high-frequency heating device with a steam generating function for performing heat treatment on an object to be heated by combining high-frequency heating and steam heating.
[0002]
[Prior art]
Conventional high-frequency heating devices include a microwave oven provided with a high-frequency generator for heating, and a combination range in which a convection heater for generating hot air is added to the microwave oven. Further, a steamer that introduces steam into a heating chamber to heat it, a steam convection oven in which a convection heater is added to the steamer, and the like are also used as the heating cooker.
[0003]
When cooking food or the like with the above-mentioned heating cooker, the heating cooker is controlled so that the finished state of heating of the food becomes the best state. That is, cooking combining high frequency heating and hot air heating can be controlled by a combination range, and cooking combining steam heating and hot air heating can be controlled by a steam convection oven. However, cooking using a combination of high-frequency heating and steam heating requires time and effort such as transferring the heated food between different heating cookers for each heating process. In order to solve the inconvenience, there is one in which high-frequency heating, steam heating, and electric heating are realized by one heating cooker. This cooking device is disclosed, for example, in Japanese Patent Application Laid-Open No. 54-115448.
[0004]
[Problems to be solved by the invention]
However, according to the configuration of the above publication, a vaporization chamber for generating heated steam is buried below the heating chamber, and water is always supplied from the water storage tank at a constant water level. Therefore, it is difficult to clean the surroundings of the heating chamber on a daily basis. Particularly in the vaporization chamber, calcium, magnesium, and the like in the water are concentrated in the process of generating steam, and settle and adhere to the bottom of the vaporization chamber and in the pipe, and the amount of generated steam is reduced. As a result, there has been a problem that an unsanitary environment in which molds and the like are liable to breed is obtained.
[0005]
As a method of introducing steam into the heating chamber, a method of generating steam by a heating means such as a boiler arranged outside the heating chamber and supplying the generated steam to the heating chamber may be considered. Problems such as the propagation of bacteria, damage due to freezing, and contamination by foreign substances due to rust, etc., and it is often difficult to disassemble and clean the heating means. It is difficult to adopt a method of introducing steam from the outside in a heating cooker that needs to be used.
[0006]
The present invention has been made in view of the above circumstances, and provides a high-frequency heating apparatus with a steam generating function, in which a steam generating section is easy to clean and can always be kept hygienic, and can increase heating efficiency. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a high-frequency heating apparatus with a steam generation function according to claim 1 of the present invention supplies at least one of high frequency and steam to a heating chamber that accommodates the object to be heated, thereby supplying the object to be heated. A high-frequency heating device with a steam generation function for performing a heat treatment, comprising: a high-frequency generation unit; and a steam generation unit that supplies steam into the heating chamber.
[0008]
In this high-frequency heating device with a steam generating function, the steam is supplied into the heating chamber, so that the steam can be quickly supplied into the heating chamber. In addition, as the heating method, both high-frequency heating and steam heating can be performed simultaneously, one of them can be performed individually, and both can be performed in a predetermined order. An appropriate cooking method can be arbitrarily selected according to the distinction between refrigerated products and the like. In particular, when high-frequency heating and steam heating are used together, the rate of temperature rise of the object to be heated can be increased, so that efficient cooking can be performed in a short time.
[0009]
According to a second aspect of the present invention, the high-frequency heating device with the steam generating function is characterized in that the steam generating section is arranged in a heating chamber and generates steam from an evaporating dish having a water recess by heating.
[0010]
In this high-frequency heating device with a steam generating function, since steam is generated from the evaporating dish provided in the heating chamber, the steam is directly supplied into the heating chamber, and the steam generating section can be easily cleaned. Can be. Thereby, the surroundings of the heating chamber can always be kept in a sanitary environment. In addition, heating that combines high-frequency heating and steam heating can be easily realized.
[0011]
According to a third aspect of the present invention, in the high-frequency heating device with a steam generating function, the evaporating dish is disposed on a bottom surface of the heating chamber on a side opposite to a heated object outlet.
[0012]
In this high-frequency heating device with a steam generating function, since the evaporating dish is disposed on the back bottom surface of the heating chamber opposite to the outlet for the heated object, the evaporating dish does not hinder the removal of the object to be heated. Also, even if the temperature of the evaporating dish is high, there is no risk of touching the evaporating dish when the object to be heated is taken in and out, so that the safety is enhanced.
[0013]
According to a fourth aspect of the present invention, in the high-frequency heating device with a steam generating function, the evaporating dish is disposed on a bottom surface along one of side wall surfaces of the heating chamber.
[0014]
In this high-frequency heating device with a steam generating function, by disposing the evaporating dish on the bottom surface along the side wall of the heating chamber, the steam from the evaporating dish can be efficiently supplied to the heating chamber.
[0015]
According to a fifth aspect of the present invention, in the high-frequency heating device with a steam generating function, the evaporating dish is disposed at a position in which an upper surface of the evaporating dish is higher than a bottom surface of the heating chamber by a predetermined height.
[0016]
In this high-frequency heating device with a steam generating function, liquid such as juice oozing from the object to be heated is prevented from flowing along the bottom surface into the evaporating plate on the bottom surface of the heating chamber, and the evaporating plate is kept hygienic. be able to.
[0017]
According to a sixth aspect of the present invention, in the high-frequency heating device with a steam generating function, the evaporating dish is disposed along a bottom surface of the heating chamber on which the object to be heated is placed.
[0018]
In this high-frequency heating device with a steam generating function, steam is generated from an evaporating dish along a bottom surface of a heating chamber in which an object to be heated is placed.
[0019]
According to a seventh aspect of the present invention, in the high-frequency heating device with a steam generating function, the steam generating unit includes an evaporating dish heater for heating the evaporating dish.
[0020]
In this high-frequency heating device with a steam generating function, since steam is generated by heating the evaporating dish with the evaporating dish heater, the steam can be efficiently generated with a simple structure.
[0021]
The high frequency heating device with a steam generating function according to claim 8 is characterized in that the steam generating section includes a reflector for reflecting radiant heat from the evaporation dish heater to the evaporation dish.
[0022]
In this high-frequency heating device with a steam generating function, the radiant heat from the evaporating dish heater is reflected by the reflecting plate toward the evaporating dish, so that the heat generated by the heater is used for generating steam with high efficiency. be able to.
[0023]
According to a ninth aspect of the present invention, in the high-frequency heating device with a steam generating function, the evaporating dish has tapered portions at both ends in the longitudinal direction such that the water recesses gradually become shallower along the longitudinal direction.
[0024]
In this high-frequency heating device with a steam generating function, the water injected into the water sump recess always accumulates in the center of the evaporating dish, whereby the total length of the evaporating dish heater can be shortened, and the compactness can be achieved.
[0025]
According to a tenth aspect of the present invention, the high-frequency heating device with a steam generating function includes a water supply unit that supplies water to the steam generating unit.
[0026]
In this high-frequency heating device with a steam generating function, water can be supplied to the evaporating dish by the water supply section, so that a large amount of steam can be continuously generated for a long time regardless of the water storage capacity of the evaporating dish. For a long time.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a high-frequency heating device with a steam generating function according to the present invention will be described in detail with reference to the drawings.
<First embodiment>
FIG. 1 is a front view showing a state in which an opening / closing door of a high-frequency heating device with a steam generating function according to the first embodiment is opened, FIG. 2 is a perspective view showing an evaporating dish of a steam generating unit used in this device, and FIG. FIG. 4 is a perspective view showing an evaporating dish heater and a reflecting plate of the generating unit, and FIG. 4 is a sectional view of the steam generating unit.
The high-frequency heating apparatus 100 with a steam generating function is a heating cooker that supplies at least one of high frequency (microwave) and steam to a heating chamber 11 that accommodates an object to be heated and heats the object to be heated. A magnetron 13 as a high-frequency generator for generating high frequency, a steam generator 15 for generating steam in the heating chamber 11, a circulation fan 17 for stirring and circulating air in the heating chamber 11, A convection heater 19 as an indoor air heater for heating the air circulating through the air, and an infrared sensor 20 for detecting the temperature in the heating chamber 11 through a detection hole provided in the wall surface of the heating chamber 11.
[0028]
The heating chamber 11 is formed inside a box-shaped main body case 10 having an open front, and an opening / closing door 21 having a light-transmitting window 21 a for opening and closing a heated object outlet of the heating chamber 11 is provided on the front surface of the main body case 10. Is provided. The lower end of the opening / closing door 21 is hingedly connected to the lower edge of the main body case 10 so that the opening / closing door 21 can be opened and closed in the vertical direction. A predetermined heat insulating space is provided between the wall surfaces of the heating chamber 11 and the main body case 10, and a heat insulating material is loaded in the space as needed. In particular, the space behind the heating chamber 11 is a circulation fan chamber 25 accommodating the circulation fan 17 and its drive motor 23 (see FIG. 7). A partition plate 27 that defines the chamber 25 is provided. In the partition plate 27, there are an intake vent hole 29 for performing intake from the heating chamber 11 side to the circulation fan chamber 25 side, and a ventilation vent hole 31 for performing ventilation from the circulation fan chamber 25 side to the heating chamber 11 side. The formation areas are provided separately. Each ventilation hole 29, 31 is formed as a number of punch holes.
[0029]
The circulation fan 17 is arranged with its center of rotation at the center of the rectangular partition plate 27, and a rectangular annular convection heater 19 is provided in the circulation fan chamber 25 so as to surround the circulation fan 17. Have been. The ventilation holes 29 formed in the partition plate 27 are arranged on the front surface of the circulation fan 17, and the ventilation holes 31 are arranged along the rectangular annular convection heater 19. When the circulation fan 17 is turned, the wind is set to flow from the front side of the circulation fan 17 to the rear side of the drive motor 23, so that the air in the heating chamber 11 flows through the ventilation holes 29 for intake. And is passed through the convection heater 19 in the circulation fan chamber 25 and sent out from the ventilation hole 31 for ventilation into the heating chamber 11. Therefore, by this flow, the air in the heating chamber 11 is circulated through the circulation fan chamber 25 while being stirred.
[0030]
The magnetron 13 is arranged, for example, in a space below the heating chamber 11, and a stirrer blade 33 is provided at a position where high frequency generated by the magnetron is received. By irradiating the rotating stirrer blades 33 with the high frequency from the magnetron 13, the high frequency is supplied to the heating chamber 11 while being stirred by the stirrer blades 33. The magnetron 13 and the stirrer blades 33 are not limited to the bottom of the heating chamber 11 but may be provided on the upper surface or the side surface of the heating chamber 11.
[0031]
As shown in FIG. 2, the steam generating section 15 has an evaporating dish 35 having a water reservoir recess 35a for generating steam by heating, and is disposed below the evaporating dish 35, as shown in FIGS. 3 and 4. The evaporating dish 35 includes an evaporating dish heater 37 for heating the evaporating dish 35, and a reflecting plate 39 having a substantially U-shaped cross section for reflecting radiant heat of the heater toward the evaporating dish 35. The evaporating dish 35 is, for example, an elongated plate made of stainless steel, and is disposed on the bottom surface on the back side of the heating chamber 11 on the opposite side to the outlet for the object to be heated, with the longitudinal direction along the partition plate 27. I have. As the evaporating dish heater 37, a glass tube heater, a sheath heater, a plate heater, or the like can be used.
[0032]
FIG. 5 is a block diagram of a control system for controlling the high-frequency heating device 100 with a steam generation function. This control system mainly includes a control unit 501 having a microprocessor, for example. The control unit 501 mainly exchanges signals with the power supply unit 503, the storage unit 505, the input operation unit 507, the display panel 509, the heating unit 511, the cooling fan 61, and the like.
[0033]
Various operations such as a start switch 519 for instructing the start of heating, a changeover switch 521 for switching between heating methods such as high-frequency heating and steam heating, and an automatic cooking switch 523 for starting a prepared program are provided on the input operation unit 507. Switch is connected.
The high frequency generator 13, the steam generator 15, the circulation fan 17, the infrared sensor 20, and the like are connected to the heater 511. The high-frequency generator 13 operates in cooperation with a radio wave agitator (a stirrer blade drive) 33, and the steam generator 15 includes an evaporating dish heater 37, a room air heater 19 (convection heater), and the like. Is connected. Note that this block diagram also includes elements other than the mechanical components described above (for example, the water pump 55, the door blower damper 84, the exhaust damper 87, and the like), which will be described later. The embodiment will be described.
[0034]
Next, the basic operation of the high-frequency heating device 100 with a steam generation function described above will be described with reference to the flowchart of FIG.
As an operation procedure, first, the food to be heated is placed on a dish or the like, placed in the heating chamber 11, and the opening / closing door 21 is closed. Then, a heating method, a heating temperature or a time is set by the input operation unit 507 (Step 10, hereinafter abbreviated as S10), and a start switch is turned ON (S11). Then, the heating process is automatically performed by the operation of the control unit 501 (S12).
[0035]
That is, the control unit 501 reads the set heating temperature and time, selects and executes an optimal cooking method based on the read heating temperature and time, and determines whether or not the set heating temperature and time have been reached (S13). When the set value is reached, each heating source is stopped to end the heating process (S14). In S12, the steam generation, the indoor air heater, the circulation fan rotation, and the high frequency heating are individually or simultaneously performed.
[0036]
At the time of the above-described operation, for example, an operation when a mode of “steam generation + circulation fan ON” is selected and executed will be described. When this mode is selected, as shown in FIG. 7 showing the operation of the high-frequency heating device 100, when the evaporating dish heater 37 is turned on, the water in the evaporating dish 35 is heated and steam S is generated. . The steam S rising from the evaporating dish 35 is sucked into the central portion of the circulation fan 17 from an intake vent hole 29 provided at a substantially central portion of the partition plate 27, passes through the circulation fan chamber 25, and rotates around the partition plate 27. Air is blown into the heating chamber 11 from the ventilation holes 31 provided in the section. The blown-out steam is stirred in the heating chamber 11, and is again sucked into the circulation fan chamber 25 through the intake vent hole 29 substantially at the center of the partition plate 27. Thereby, a circulation path is formed in the heating chamber 11 and the circulation fan chamber 25. It is to be noted that the generated steam is guided to the intake vent 29 without providing the ventilation vent 31 below the position of the circulation fan 17 of the partition plate 27. Then, as shown by a white arrow in the figure, the steam circulates through the heating chamber 11, so that the steam is blown to the object to be heated M.
[0037]
At this time, the steam in the heating chamber 11 can be heated by turning on the indoor air heater 19, so that the temperature of the steam circulating in the heating chamber 11 can be set to a high temperature. Therefore, so-called superheated steam is obtained, and heating cooking in which the surface of the object to be heated M is browned becomes possible. When high-frequency heating is performed, the magnetron 13 is turned on and the stirrer blades 33 are rotated to supply high-frequency waves into the heating chamber 11 while stirring, so that high-frequency heating cooking without unevenness can be performed.
[0038]
As described above, according to the high-frequency heating device with a steam generating function of the present embodiment, since the steam is generated inside the heating chamber 11 instead of outside, similar to the case where the inside of the heating chamber 11 is cleaned, The portion that generates steam, that is, the evaporating dish 35 can be easily cleaned. For example, in the process of generating steam, calcium, magnesium, chlorine compounds and the like in the water may be concentrated and settle down and adhere to the bottom of the evaporating dish 35, but those adhering to the surface of the evaporating dish 35 are wiped off with a cloth or the like. Just wipe it clean. In addition, when the dirt is particularly severe, as shown in FIG. 8, the evaporating dish 35 can be taken out of the heating chamber 11 and washed, so that the evaporating dish 35 can be easily cleaned. In some cases, it can be easily replaced with a new evaporating dish 35. Therefore, cleaning including the evaporating dish 35 becomes easy, and it becomes easy to always keep the inside of the heating chamber 11 in a sanitary environment.
[0039]
Further, in this high-frequency heating device, the evaporating dish 35 is disposed on the bottom surface on the far side of the heating chamber 11 opposite to the outlet for the object to be heated. Even if the plate 35 is at a high temperature, there is no danger of touching the evaporating plate 35 when the object to be heated is taken in and out, and the safety is excellent.
Further, as shown in FIG. 9, the positional relationship between the evaporating dish and the bottom of the heating chamber is shown, the evaporating dish 35 is installed at a position where the upper surface 35 b of the evaporating dish 35 is higher than the bottom of the heating chamber 11 by the height h. This prevents the liquid such as juice that has exuded from the object to be heated from flowing into the evaporating dish 35 along the bottom surface of the heating chamber 11. Thereby, the evaporating dish 35 can be kept hygienic, and since the surface 22 of the stepped portion between the evaporating dish 35 and the bottom surface is directed to the outlet for the object to be heated, the surface 22 is also easily formed. Can be cleaned.
[0040]
Further, in this high-frequency heating device, since steam is generated by heating the evaporating dish 35 with the evaporating dish heater 37, the steam can be efficiently supplied with a simple structure, and the heating to a somewhat high temperature is achieved by heating. Since steam is generated, cooking that simply humidifies, or cooking in which drying is prevented while heating is used in combination with high-frequency heating is also possible.
Further, since the radiant heat of the evaporating dish heater 37 is reflected by the reflecting plate 39 toward the evaporating dish 35, the heat generated by the evaporating dish heater 37 can be efficiently and efficiently used for steam generation. it can.
[0041]
In this high-frequency heating device, the air in the heating chamber 11 is circulated and agitated by the circulation fan 17, so that when the steam is heated, the steam is evenly distributed to every corner in the heating chamber 11. Can be made. Therefore, although the heating chamber 11 is filled with steam, the steam does not stay, and the steam spreads throughout the heating chamber 11. As a result, when the infrared sensor 20 measures the temperature of the object to be heated, the infrared sensor Can reliably measure the temperature of the object to be heated without measuring the temperature of the vapor particles in the heating chamber 11, and can increase the temperature measurement accuracy. Thus, the heating process performed with reference to the detected temperature is properly performed without malfunction.
[0042]
In addition, as the heating method, both high-frequency heating and steam heating can be performed simultaneously, one of them can be performed individually, and both can be performed in a predetermined order. An appropriate heating method can be arbitrarily selected according to the distinction between refrigerated products and the like. In particular, when both high-frequency heating and steam heating are used, the rate of temperature rise of the object to be heated can be increased, so that efficient cooking can be achieved.
[0043]
Further, since the air circulating in the heating chamber 11 can be heated by the room air heater 19 provided in the circulation fan chamber 25, the temperature of the steam generated in the heating chamber 11 can be freely adjusted. it can. For example, since the temperature of the steam can be set to a high temperature of 100 ° C. or higher, the object to be heated can be efficiently heated by the superheated steam, and the surface of the object to be heated is dried, and in some cases, the surface is heated. It is also possible to add browning. Further, when the object to be heated is a frozen product, heat transfer is performed efficiently because the heat capacity of steam is large, and thawing can be performed in a short time.
[0044]
Further, in the high-frequency heating apparatus 100 with the steam generating function, the circulation fan 17 is housed in the circulation fan chamber 25 independently provided outside the heating chamber 11 via the partition plate 27, so that the heating target is cooked. Can be prevented from adhering to the circulation fan 17. At the same time, since the ventilation is performed through the ventilation holes 29 and 31 provided in the partition plate 27, the flow of the steam generated in the heating chamber 11 depends on the positions where the ventilation holes 29 and 31 are provided and the opening areas of the ventilation holes 29 and 31. Can be changed freely.
[0045]
In the evaporating dish 35 described above, the shape of the water recess may be as follows. 10 is a schematic configuration diagram showing a cross section of another shape of the evaporating dish and an evaporating dish heater, FIG. 11 is a cross-sectional view taken along the line AA of FIG. 10, and FIG. FIG. 13 is a cross-sectional view illustrating an example, and FIG. 13 is a schematic configuration diagram illustrating still another shape of the evaporating dish.
The evaporating dish 42 shown in FIG. 10 has tapered portions 42a at both ends in the longitudinal direction where the water recesses gradually become shallower along the longitudinal direction, and water injected into the water recesses flows along the tapered portions 42a. So that it always accumulates in the center of the evaporating dish. With this configuration, the overall length of the evaporating dish heater 37 can be shortened, and the size can be reduced. Further, the cross section of the bottom of the water recess may be flat as shown in FIG. 11 or may be curved as shown in FIG. In the case of the curved shape, the water in the water recess always collects at the lowest position near the evaporating dish heater 37, and the heating efficiency is improved. In addition, in the evaporating dish 43 shown in FIG. 13, the bottom surface of the water sump recess is formed in a curved shape along the longitudinal direction, so that water is concentrated in the vicinity of the center where the heat from the evaporating dish heater 37 is concentrated. It will accumulate. Therefore, heating with increased thermal efficiency can be performed.
[0046]
In addition, the arrangement position of the evaporating dish 35 in the heating chamber 11 is not limited to the bottom surface on the back side opposite to the object to be heated, and can be changed as appropriate. As shown in FIG. 14, an example of the arrangement of the evaporating dishes is, for example, a bottom surface along the side wall surface 81a, 81b of the heating chamber shown in FIG. You may. Further, one or a plurality of small evaporating dishes 44 shown in FIG. 14B may be arranged at a corner (corner) of the bottom surface of the heating chamber 11. The small evaporating dish 44 in this case is, for example, a bowl-shaped evaporating dish, and is provided with an evaporating dish heater below the evaporating dish. In any case, as long as steam can be supplied into the heating chamber, the evaporating dish can be arranged at an arbitrary position. In addition, since the flow of the generated steam is generally an upward flow, it is preferable to provide the evaporating dish below the heating chamber from the viewpoint of stirring the steam. For example, it may be provided in the lower half area of the heating chamber or along the bottom surface of the heating chamber. In addition, if cleaning is easy, it may be provided in a space further below the bottom surface of the heating chamber. Further, the evaporating dish may not be fixed at a predetermined position, and may be arranged at an arbitrary position by a user. In this case, the steam generation source can be arranged at an optimum position according to the heating content.
[0047]
<Second embodiment>
Next, a high-frequency heating device with a steam generation function according to a second embodiment of the present embodiment will be described with reference to FIGS. In the following description, the same members as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the high-frequency heating device with a steam generating function according to the present embodiment, as shown in FIG. 15A, the upper surface of the evaporating dish 35 is covered with a lid 41 having a partly provided with an opening 41a. Thus, as shown in FIG. 15B, the position where steam is emitted can be limited to a portion having the opening 41a. Further, the supply amount of steam can be adjusted according to the opening area of the opening 41a.
[0048]
As shown in FIG. 16, the opening 41a is provided below the intake vent hole 29 in the center of the partition plate 27. Accordingly, when the generated steam rises from the opening 41a, it is immediately sucked into the intake vent hole 29, and becomes a circulating flow in which the steam circulates in the heating chamber 11 without wasting. In addition, since the lid 41 is configured to be detachable, it is easy to replace the lid with a lid having a different opening size, and it is possible to use an appropriate lid according to the heating conditions.
[0049]
Further, in this high-frequency heating device with a steam generating function, as shown in FIG. 16, most of the steam sucked into the intake vent hole 29 is blown into the heating chamber 11 mainly from near the bottom surface of the heating chamber 11. In order to make it possible, a large number of ventilation holes 31 a for ventilation provided in the partition plate 27 are formed below the partition plate 27. This is because since the steam itself rises, it is possible to achieve a more uniform overall flow by blowing out more from the lower side. By doing so, the flow of the steam in the heating chamber 11 first flows low near the bottom surface, and then flows upward. The ventilation holes 31b are provided at a substantially intermediate height of the partition plate 27. The second-stage tray (not shown) for placing an object to be heated (not shown) in the heating chamber 11 has a substantially intermediate height. It is provided to blow air to the object placed on this tray in order to be loaded in the tray position.
With this configuration, a circulating flow in which heating is more effective than in the above-described embodiment is created, and the temperature distribution in the heating chamber 11 is suppressed to a small value. Therefore, the object to be heated placed in the heating chamber 11 can be heated uniformly and at high speed.
[0050]
The lid 41 may be another lid whose perspective view is shown in FIG. The lid 45 is formed in a plate shape in which a plurality of circular openings 45 a are provided along the longitudinal direction, and a gap of a predetermined height is formed between the upper surface of the evaporating dish 35 and the four corners on the back surface. Leg portion 45b is formed so as to protrude in the thickness direction. The lid 45 is made of cordierite (2MgO.2Al) which is a low dielectric constant material having low radio wave loss. ₂ O ₃ ・ 5SiO ₂ ), Which is resistant to thermal shock and has mechanical strength that does not easily break.
[0051]
By placing the lid 45 on the evaporating dish 35, as shown in FIG. 18, a gap 46 with a predetermined interval t is formed between the evaporating dish 35 and the leg 45b of the lid 45. When the water in 35 is heated, the pressure increase in the lower part of the lid 45 is suppressed. As a result, even when the temperature of the water in the evaporating dish 35 rises and bumping occurs, the pressure is efficiently released from the gap 46 and water does not scatter from the opening 45a. Therefore, the generated steam stably flows upward from the opening 45a. Even when bumping occurs, the flow path is bent by the flanges 47 on both sides of the evaporating dish 35, so that water does not scatter from the gap 46, and almost no water splashes into the heating chamber 11. Absent.
[0052]
In the above description, the case where a propeller-type circulation fan is provided is shown. However, as shown in FIG. 19, a sirocco fan 18 may be used as the circulation fan. According to this configuration, most of the generated wind can be strongly blown out from the lower ventilation hole 31a. Therefore, the steam S generated in the steam generation unit 15 can be directly circulated while being filled in the heating chamber 11 as it is.
[0053]
<Third embodiment>
Next, a high-frequency heating device with a steam generating function according to a third embodiment of the present invention will be described with reference to FIGS.
FIG. 20 is a side view showing a main part of the high-frequency heating device with a steam generating function of the present embodiment, FIG. 21 is an explanatory diagram showing a nozzle attached to the end of a pipeline, and FIG. 22 is an explanatory diagram showing a removable water storage tank. FIG. 23 is a conceptual partial sectional view of the main body case.
[0054]
The high-frequency heating device with a steam generating function according to the present embodiment is characterized in that a water supply unit 51 for supplying water to the evaporating dish 35 of the steam generating unit 15 is newly added, as shown in FIG. The water supply unit 51 includes a water storage tank 53, a water supply pump 55 that supplies a predetermined amount of water from the water storage tank 53 to the evaporating dish 35, and a water supply pipe 57 that connects the water storage tank 53 to the evaporating dish 35. And
[0055]
Further, as shown in FIG. 21, the end 57a of the water supply pipe 57 on the side of the evaporating dish 35 projects from the side wall surface 81a of the heating chamber 11, and the projecting end 57a is provided with a flexible heat-resistant resin material. Is attached. Therefore, the water in the water storage tank 53 is supplied to the evaporating dish 35 by the water supply pump 55 through the water supply line 57 and the nozzle 52. The end 57a of the water supply pipe 57 may be discharged from any side wall surface (for example, 81a) or the wall surface of the partition plate 27 on the back side of the heating chamber.
[0056]
According to the configuration of the present embodiment, since water can be continuously supplied to the evaporating dish 35, a long-time continuous steam heating process can be performed. In addition, since the nozzle 52 is detachably provided, the nozzle 52 can be removed even when calcium or magnesium in water adheres or sap or the like scattered from the object to be heated adheres similarly to the evaporating dish. Can be washed. In addition, the nozzle can be replaced with a new nozzle, which facilitates maintenance. By providing the nozzle 52 at the end 57a of the water supply pipe 57, cleaning is simplified, and water can be supplied to the evaporating dish in a sanitary environment. Further, since the nozzle 52 is formed of a flexible material, the nozzle 52 is not damaged even if it comes into contact with tableware or the like in the heating chamber 11, and the inside of the nozzle 52 can be easily cleaned. Further, by manufacturing the nozzle 52 as an integral injection-molded product, it can be supplied at low cost by mass production.
[0057]
The water storage tank 53 is a cartridge type as shown in FIG. 22 showing a partial perspective view of the side surface of the present apparatus, in order to improve the handling property, so that the apparatus itself does not become large when incorporated in the apparatus. It is compactly embedded in the side wall of the main body case 10 where the temperature is relatively low. In addition, the device may be disposed on the upper surface side of the device after heat insulation treatment, or may be disposed on the lower surface side.
[0058]
It is preferable that the cartridge type water storage tank 53 can be easily taken out from the outside of the apparatus and can be easily replaced, whereby the handling property can be improved and the tank can be easily cleaned. For example, as shown in the figure, the lid 59 may be opened and closed from the side of the apparatus so that it can be put in and out, or it may be made possible to put it in and out from the front of the apparatus. Further, the cartridge type water storage tank 53 is formed of a transparent material such as resin or glass, and the wall of the tank housing portion on the body case side is also made of a transparent material, so that the remaining amount of water in the water storage tank 53 can be reduced. It is preferable to be configured so that it can be visually confirmed from the above. Further, by attaching a remaining amount sensor, the remaining amount of water in the water storage tank 53 is displayed on the display panel 509 or the like, or is notified by sounding a buzzer or the like from a speaker (not shown), so that the evaporating plate 35 can be used for empty heating. Can be prevented beforehand.
[0059]
Here, when the water storage tank 53 made of resin is disposed on a side wall portion or the like of the apparatus, the water storage tank 53 may be affected by heat from the heating chamber 11. In this case, as shown in a conceptual partial sectional view of the main body case 10 in FIG. 23, the water storage tank 53 is provided with a cooling fan 61 (as an example, disposed at the bottom of the apparatus and provided with the high-frequency generator 13 at the time of high-frequency heating). (A fan for cooling the cooling chamber is used) is provided in the middle of the ventilation passage 63 for sending cooling air from the heating chamber 11 into the heating chamber 11. In such a case, since the water storage tank 53 can be minimized from being affected by heat, the range of selection of the tank material can be widened, and the need to dare to protect the water storage tank 53 with heat insulating material is also reduced. .
[0060]
<Fourth embodiment>
Next, a high-frequency heating device with a steam generating function according to a fourth embodiment of the present invention will be described with reference to FIG.
In the high-frequency heating device with a steam generating function according to the present embodiment, as shown in FIG. 24, a conceptual vertical cross-sectional view of the back side of the main body case 10, apart from the heating chamber 11 and the circulation fan chamber 25, these two chambers 11, 25, an infrared sensor 20 for detecting a temperature in the heating chamber 11 through a detection hole 73 provided in a wall surface of the heating chamber 11, and a circulating fan. A self-cooling fan 75 that is provided coaxially with the drive shaft 17 and cools the drive motor 23 is housed therein. The pressure P on the side of the self-cooling fan chamber 71 near the detection hole 73 is generated by the wind pressure generated by the rotation of the self-cooling fan 75. ₁ Is the pressure P on the heating chamber 11 side. ₂ To keep it higher.
[0061]
Generally, when the temperature inside the heating chamber 11 is measured by the infrared sensor 20, if a transparent member such as glass for protection is attached to the detection hole 73, steam adheres to the glass and accurate measurement cannot be performed. The hole 73 is a mere through-hole without any interposition. However, in the case of a through-hole, since the air in the heating chamber 11 can freely enter and exit, there is a possibility that steam or the like may adhere to the infrared sensor 20, thereby lowering the temperature measurement accuracy.
[0062]
In this regard, in the high-frequency heating device with a steam generating function of the present embodiment, the pressure P on the side of the self-cooling fan chamber 71 near the detection hole 73 is determined by the wind pressure generated by the rotation of the self-cooling fan 75. ₁ Is the pressure P on the heating chamber 11 side. ₂ Since the air temperature is kept higher than that, it is possible to prevent the air in the heating chamber 11 from entering the self-cooling fan chamber 71 containing the infrared sensor 20. For this reason, it is possible to prevent the detection accuracy from being reduced due to the attachment of dirt to the infrared sensor 20, and it is possible to always measure the temperature in the heating chamber 11 with high accuracy. Therefore, the heat treatment can be performed under accurate temperature control, and the heating of the object to be heated can be controlled as desired.
[0063]
Here, a method of measuring the temperature by the infrared sensor 20 will be described. FIG. 25 is an explanatory diagram showing how the temperature is measured by the infrared sensor. The infrared sensor 20 scans in the direction of the arrow in the figure by swinging the infrared sensor 20 at the same time while simultaneously detecting the temperature at a plurality of points (n points) at a time, and scans the inside of the heating chamber 11 at a plurality of measurement points (n points). The temperature is measured for point m in the scanning direction. Therefore, temperature detection at n × m measurement points shown in FIG. 25B can be performed by one scan of the infrared sensor 20. The temperature of the object to be heated M is determined based on the rate of rise of the temperature at each measurement point that is continuously detected with respect to the elapsed time, and the position of the object to be heated M is determined. Treated as M temperature.
[0064]
The temperature measurement range of the infrared sensor 20 is the bottom surface of the heating chamber 11 excluding the position where the evaporating dish 35 is arranged. Therefore, the evaporating dish 35 is disposed at a position substantially deviated from the temperature measurement wave by the infrared sensor 20. Note that a method of performing temperature measurement by scanning the infrared sensor 20 over the entire bottom surface of the heating chamber 11 and invalidating detection data from the position of the evaporating dish 35 may be used.
[0065]
<Fifth embodiment>
Next, a high-frequency heating device with a steam generating function according to a fifth embodiment of the present invention will be described with reference to FIG.
In the high-frequency heating apparatus with a steam generation function of the present embodiment, as shown in a conceptual cross-sectional view of the main body case 10 in FIG. An outside air outlet 82 for blowing outside air to the inner surface of the light window 21a is provided. The outside air outlet 82 is communicated with a side ventilation passage 83 secured between the main body case 10 and the side wall surface of the heating chamber 11, and a rear ventilation passage 85 is provided in the side ventilation passage 83 via a damper 84. It is connected. The air from the cooling fan 61 provided at the bottom of the apparatus can be blown into the heating chamber 11 from the outside air outlet 82 through the side ventilation passage 83 by switching the damper 84. If the damper 84 is switched to the other, the cooling air is exhausted from the exhaust port 88 to the outside.
[0066]
By blowing outside air toward the inner surface of the light transmitting window 21a in this manner, the light transmitting window 21a can be prevented from fogging with steam during steam heating or high frequency heating. The heating state can be visually confirmed from the outside. The blowing of the outside air may be performed only when necessary. For example, by starting the blowing of the outside air a predetermined time before the end of the heating, the fogging of the translucent window 21a can be removed at the end of the heating, and the steam can be removed at the time of opening the door. Can be prevented from standing in front. In addition, since the outside air is forcibly introduced and blown to the translucent window 21a, the steam expelling effect (cooling effect) before opening the opening / closing door 21 is particularly excellent.
[0067]
<Sixth embodiment>
Next, a high-frequency heating device with a steam generating function according to a sixth embodiment of the present invention will be described with reference to FIGS.
In the high-frequency heating device with a steam generation function of the present embodiment, as shown in FIG. 27, a front view showing a schematic configuration of a main body case, and FIG. An exhaust port 86 for evacuating the air in the heating chamber 11 is disposed on the front side above the one side wall surface 81a, and is disposed on the back side below the other side wall surface 81b of the heating chamber 11. . In this case, the exhaust port 86 is directly connected to the outside via the damper 87 so that the air or steam in the heating chamber 11 can be immediately discharged to the outside of the apparatus.
[0068]
By arranging the exhaust port 86 in the vicinity of the bottom surface of the heating chamber 11 as described above, the air flow in the heating chamber 11 at the time of exhausting flows from the upper surface side to the bottom surface side. It can be discharged effectively without stagnation. Further, since the exhaust destination is outside air outside the apparatus, there is an effect that evaporation components generated from the object to be heated can be suppressed from adhering to the inner wall of the apparatus. By providing the outside air outlet 82 on the near side and the exhaust port 86 on the back side of the heating chamber 11, the exhausted air in the heating chamber 11 flows diagonally through the rectangular parallelepiped space in the heating chamber 11. Traverses, and more efficient and quick ventilation can be performed.
[0069]
<Seventh embodiment>
Next, a high-frequency heating device with a steam generating function according to a seventh embodiment of the present invention will be described with reference to FIG.
In the high-frequency heating device with a steam generating function of the present embodiment, as shown in a schematic configuration diagram of the device in FIG. 29, the water in the evaporating plate 35 is evaporated by high-frequency heating without providing an evaporating plate heater. I have. In this case, the water in the evaporating dish 35 may be heated with high frequency by stirring with the usual stirrer blades 33, but desirably, the destination of the high frequency by the stirrer blades 33 can be directed to the evaporating dish 35. It is preferable to design the stirrer blades 33 so that the evaporating dish 35 can be heated intensively. Although the stirrer blade 33 normally rotates to heat the entire heating chamber 11 uniformly, this can be realized by stopping the stirrer blade 33 at a specific position. For example, if control is performed such that the water in the evaporating dish 35 is heated for a predetermined period of time and then the process returns to the normal heating processing in the heating chamber 11, a steam heater and high-frequency heating may be provided with an evaporating dish heater. Can be performed at the same time.
[0070]
As described above, by omitting the evaporating dish heater and heating and evaporating the water in the evaporating dish 35 with high frequency, the configuration can be simplified and the cost can be reduced.
[0071]
In each of the above embodiments, the example in which the stirrer blades 33 are provided to stir high frequency is described. However, as shown in FIG. However, the present invention can be similarly applied. That is, in the case shown in the drawing, the turntable 91 is arranged on the bottom side of the heating chamber 11 excluding the position where the evaporating dish 35 is arranged, so that the steam can be generated as functionally as it is.
[0072]
Next, a variation of the steam generation method of the steam generation unit 15 will be described with reference to FIG. In the figure, 11 is a heating chamber, 401 is a cartridge type water tank, 402 is a pump, and 403 is a drainage mechanism. (A) is the simplest type using the evaporating dish 35 and the evaporating dish heater 37 described above. When a glass tube type far-infrared heater is used as the evaporating dish heater 37, the amount of generated steam is about 10 g / min, and steam can be generated in about 40 seconds. When a halogen heater is used, the amount of generated steam is about the same as the above, and steam can be generated in about 25 seconds. This type of structure has the advantages of being simple and inexpensive and having a short time to steam generation.
[0073]
(B) is a type in which water in the evaporating dish 35 is heated using an inverter power supply 405 and an IH (electromagnetic induction heating) coil 406. In this type, the amount of steam generation is about 15 g / min, and steam can be generated in about 15 seconds, and there is an advantage that the time until steam generation is short.
[0074]
(C) shows a type using a dropping type IH steamer 406, in which water droplets are dropped and evaporated on a member heated using an inverter power supply 405 and an IH (electromagnetic induction heating) coil. Although this type is large, the amount of steam generated is about 20 g / min, and steam can be generated in about 5 seconds.
[0075]
(D) is a type in which steam is generated using the boiler 407, and can generate steam in about 40 seconds at a steam generation amount of about 12 to 13 g / min. Although this complicates the drainage mechanism 403 and the like, it can be configured at low cost.
[0076]
(E) is a type using an ultrasonic steam generator 408, in which generated steam is sucked out by a fan F, heated by a room air heater 19, and then supplied to the heating chamber 11.
[0077]
【Example】
Here, examples in which various types of heat treatment are performed by the above-described high-frequency heating device with a generating function according to the present invention will be described.
FIG. 32 shows how the weight changes when one piece of meat is heated as an object to be heated. When the meat bun is heated (steamed) with steam, it can be determined from the increase in the amount of water whether or not the meat was finally heated to a good state.
[0078]
(A) shows a case where a convection heater as a room air heating heater is heated at 570 W and steam heating is performed without operating a circulation fan. (B) shows a case where the convection heater is heated at 680 W and steam is heated without operating the circulation fan. In any case, the increase in the amount of water with respect to the heating time is relatively small, and it can be seen that a satisfactory steaming effect could not be obtained simply by heating the convection heater by filling the heating chamber 11 with steam.
[0079]
On the other hand, when the circulation fan was operated as in (c) and (d), a relatively high water content was obtained, and a good steaming effect was obtained. It was also found that a good steaming effect was obtained over time even when the rotation speed of the circulation fan was reduced as shown in FIG. That is, the moisture content of the steamed product can be increased by the operation of the circulation fan. Therefore, it can be said that circulation of steam is indispensable when heating with steam.
[0080]
FIG. 33 shows the difference in the amount of dew condensation between the door and the heating chamber when the circulation fan is operated and not operated. Although the condensation increases with time, it can be seen that the amount of condensation can be greatly reduced by operating the circulation fan. Ten minutes after the start of the heating, when the circulation fan was not rotated, the door was 7.6 g and the heating chamber was 14.4 g. When the circulation fan was rotated, the door was 3.1 g and the heating chamber 7 was not. 0.3 g, and the amount of dew can be reduced to about half.
[0081]
FIG. 34 shows the results of examining the change in the amount of dew condensation in the inside of the refrigerator and at the door from the end of the steam heating in the case of heating with the convention heater and without heating. By operating the convention heater, the amount of dew condensation in the heating chamber is significantly reduced from 7.3 g at the end of heating to 3.0 g (1 minute) and 0.3 g (2 minutes). Also, with respect to the door, a tendency to decrease from 3.1 g to 2.9 g (1 minute) and 1.3 g (2 minutes) is observed.
[0082]
FIG. 35 shows the results of examining the measurement performance of the infrared sensor when the circulation fan is operated when the heating chamber is filled with steam and when the circulation fan is not operated. When the circulating fan is not operated, the measurement value of the infrared sensor fluctuates halfway and the measurement accuracy is reduced. However, when the circulating fan is operated, stable measurement is always performed. That is, by operating the circulation fan, the detection level of the infrared sensor is stabilized, and good temperature measurement can be performed.
[0083]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the high frequency heating apparatus with a steam generation function which concerns on this invention, a steam can be supplied to a heating chamber promptly, and a steam generation part is easy to clean and can always keep sanitary.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which a door of a high-frequency heating device with a steam generating function according to a first embodiment of the present invention is opened.
FIG. 2 is a perspective view showing an evaporating dish of a steam generating section used in the high-frequency heating device with a steam generating function of FIG.
FIG. 3 is a perspective view showing an evaporating dish heater and a reflection plate of the steam generation unit.
FIG. 4 is a cross-sectional view of a steam generating section of the apparatus.
FIG. 5 is a block diagram of a control system for controlling the high-frequency heating device with a steam generation function.
FIG. 6 is a flowchart illustrating a basic operation of the high-frequency heating device with a steam generation function.
FIG. 7 is an operation explanatory diagram of the high-frequency heating device with a steam generation function.
FIG. 8 is an explanatory diagram showing a state in which an evaporating dish is taken out of a heating chamber.
FIG. 9 is an explanatory diagram showing a positional relationship between an evaporating dish and a bottom surface of a heating chamber.
FIG. 10 is a schematic configuration diagram showing a cross section of another shape of the evaporating dish and an evaporating dish heater.
FIG. 11 is a sectional view taken along line AA of FIG. 10;
FIG. 12 is a sectional view showing another example of the AA section in FIG. 10;
FIG. 13 is a schematic configuration diagram illustrating still another shape of the evaporating dish.
FIG. 14 is an explanatory diagram showing an example of the arrangement of evaporating dishes.
FIG. 15 is a perspective view of an evaporating dish and a lid used in the high-frequency heating device with a steam generating function according to the second embodiment of the present invention, wherein (a) shows a state before the lid is put on, and (b) shows a lid. It is a figure showing the state where it was covered.
FIG. 16 is an explanatory diagram showing a state of circulation of steam by a high-frequency heating device with a steam generation function.
FIG. 17 is a perspective view showing a configuration of another lid.
FIG. 18 is an explanatory diagram showing an operation when the lid of FIG. 17 is used.
FIG. 19 is a side view showing a modification using a sirocco fan.
FIG. 20 is a side view showing a main part of a high-frequency heating device with a steam generating function according to a third embodiment of the present invention.
FIG. 21 is an explanatory view showing a nozzle attached to a pipe end.
FIG. 22 is an explanatory view showing a removable water storage tank.
FIG. 23 is a conceptual partial sectional view of a main body case.
FIG. 24 is a longitudinal sectional view illustrating a main part of a high-frequency heating device with a steam generating function according to a fourth embodiment of the present invention.
FIG. 25 is an explanatory diagram showing a state of temperature measurement by an infrared sensor.
FIG. 26 is a plan view showing a schematic configuration of a high-frequency heating device with a steam generation function according to a fifth embodiment of the present invention.
FIG. 27 is a front view showing a schematic configuration of a high-frequency heating device with a steam generation function according to a sixth embodiment of the present invention.
FIG. 28 is a plan view illustrating a ventilation path of the apparatus of FIG. 27.
FIG. 29 is a schematic configuration diagram of a high-frequency heating device with a steam generation function according to a seventh embodiment of the present invention.
FIG. 30 is a perspective view showing a configuration example including a turntable.
FIG. 31 is an explanatory view showing various variations (a) to (e) of a steam generation unit.
FIG. 32 is a view showing a state of weight change when one piece of meat is heated as an object to be heated.
FIG. 33 is a diagram showing a difference in the amount of dew condensation between the door and the heating chamber when the circulation fan is operated and not operated.
FIG. 34 is a diagram showing the results of examining the change in the amount of dew condensation in the inside of the refrigerator and at the door from the end of steam heating in the case of heating with the convention heater and without heating.
FIG. 35 is a diagram showing the results of examining the measurement performance of the infrared sensor when the circulation fan is operated when the heating chamber is filled with steam and when the circulation fan is not operated.
[Explanation of symbols]
11 heating room
13 magnetron (high frequency generator)
15 Steam generator
17, 18 Circulation fan
19 Convection heater (room air heater)
20 Infrared sensor
21 Opening / closing door
21a translucent window
23 Drive motor
25 Circulation fan room
27 Divider
29 Ventilation holes for intake
31, 31A, 31B Ventilation holes for ventilation
33 Stirrer blade (radio wave stirring unit)
35 Evaporating dish
37 Evaporating dish heater
39 Reflector
41 Lid
41a opening
51 Water supply section
53 Water storage tank
55 water pump
71 Self-cooling fan room
73 Detection hole
75 Self-cooling fan
82 outlet
86 exhaust port
100 High frequency heating device with steam generation function

Claims (10)

A high-frequency heating apparatus with a steam generation function of heating at least one of high-frequency and steam to heat the object by supplying at least one of high-frequency and steam to a heating chamber that accommodates the object to be heated,
A high frequency generator,
A high-frequency heating device with a steam generation function, comprising: a steam generation unit that supplies steam into the heating chamber. The high-frequency heating apparatus with a steam generating function according to claim 1, wherein the steam generating section is disposed in a heating chamber and generates steam from an evaporating dish having a water reservoir recess by heating. 3. The high-frequency heating apparatus with a steam generating function according to claim 2, wherein the evaporating dish is disposed on a rear bottom surface of the heating chamber on a side opposite to a heated object outlet. The high-frequency heating device with a steam generating function according to claim 2, wherein the evaporating dish is disposed on a bottom surface along one of side wall surfaces of the heating chamber. The steam according to any one of claims 2 to 4, wherein the evaporating dish is disposed at a position where an upper surface of the evaporating dish is located at a predetermined height above a bottom surface of the heating chamber. High frequency heating device with generating function. The high frequency heating with a steam generation function according to any one of claims 2 to 5, wherein the evaporating dish is disposed along a bottom surface of the heating chamber on which the object to be heated is placed. apparatus. The high frequency heating device with a steam generating function according to any one of claims 2 to 6, wherein the steam generating section includes an evaporating dish heater for heating the evaporating dish. The high-frequency heating device with a steam generating function according to claim 7, wherein the steam generating section includes a reflector that reflects radiant heat from the evaporating dish heater to the evaporating dish. The high frequency heating device with a steam generation function according to claim 7 or 8, wherein the evaporating dish has tapered portions at both ends in the longitudinal direction, the water recesses gradually becoming shallower along the longitudinal direction. The high frequency heating device with a steam generation function according to any one of claims 1 to 9, further comprising a water supply unit that supplies water to the steam generation unit.

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