JP3775379B2 - High frequency heating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high-frequency heating apparatus with a steam generation function that heat-treats an object to be heated by combining high-frequency heating and steam heating.
[0002]
[Prior art]
Conventionally, this type of cooking device has a heat generating element that vaporizes water and further heats it, a water supply means that supplies water to the steam generating means, and a temperature detecting means that detects the temperature of the generated steam. The amount of water supply and heat generation are controlled so that the temperature of the generated steam becomes the predetermined temperature, and an appropriate steam temperature and amount of steam can be supplied. You can set the cooking conditions with confidence. Moreover, since the steam temperature is directly detected, abnormal heating or the like can be prevented (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-339401 (page 3, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, according to the configuration of Japanese Patent Laid-Open No. 10-339401, the temperature of the heating steam is measured, but the temperature of the steam generating part is not measured, and the air temperature is measured for measuring the ambient temperature. There is a problem that detection of a rapid temperature rise in the steam generation unit is delayed, which may cause thermal damage to the steam generation unit.
[0005]
The present invention has been made in consideration of the above circumstances, and by controlling the temperature of the steam generating section and the supply of water, the optimal amount of steam is generated in food, and safety such as preventing airing is prevented in advance. An object of the present invention is to provide a high-frequency heating device with a steam generation function that has improved the temperature.
[0006]
[Means for Solving the Problems]
To achieve the above object, a high-frequency heating apparatus with a steam generation function according to the present invention detects a temperature of a heating chamber that accommodates an object to be heated, a steam generation unit that generates steam in the heating chamber, and the steam generation unit. Temperature detection means, heater heating control means for controlling heating of the heater of the steam generation section, water supply means for supplying water to the steam generation section, and water supply for controlling water supply from the water supply means Control means, and controls heating control of the heater or water supply based on temperature information of the temperature detection means.
[0007]
As a result, necessary water is supplied from the water supply means based on the temperature information of the temperature detection means disposed in the vicinity of the evaporating dish. If new water is not supplied, the operation of the heater is stopped to prevent emptying. At the same time, during cooking, the heater can be controlled to adjust the amount of generated steam, and cooking can be performed with the optimum amount of steam for food.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 is a heating chamber that accommodates an object to be heated, a steam generation unit that generates steam in the heating chamber, a temperature detection unit that detects a temperature of the steam generation unit, a control unit, A heater heating control means for controlling the heating of the heater of the steam generation section, a water supply means for supplying water to the steam generation section, and a water supply control means for controlling the supply of water, wherein the control section includes the temperature based on the temperature information of the detecting means, in the row cormorants high-frequency heating device at least one control of the water supply control and heater control, the water supply control means, the temperature of the temperature detection means from the time of water in the previous cooking And it is characterized by determining whether water supply is performed at the time of the start of this cooking from the information of elapsed time .
[0009]
This high-frequency heating apparatus with a steam generating function has means for controlling a heater for heating the evaporating dish, and supplies water to the evaporating dish based on the temperature information of the temperature detecting unit disposed in the vicinity of the evaporating dish. Adjust the water supply amount with the water supply pump of the water supply unit.If new water is not supplied, stop the operation of the heater, prevent emptying of the evaporating dish, and supply the heater and water during cooking. The amount of generated steam can be controlled and cooking can be performed with the optimum amount of steam for food.
[0010]
In addition, it has means for controlling a heater for heating the evaporating dish, water is supplied to the evaporating dish based on the temperature information of the temperature detecting unit disposed in the vicinity of the evaporating dish, and water is supplied by the water supply pump of the water supplying unit. The amount of water can be adjusted. Alternatively, it is possible to prevent emptying of the evaporating dish by controlling the heater based on the temperature information of the temperature detector. In this way, during cooking, the amount of generated steam can be adjusted by controlling the heater or the supply of water, and cooking can be performed with the optimum amount of steam for food.
[0011]
Also it has a means for controlling the heater for heating the vapor Hatsusara, the temperature information of the temperature detecting portion disposed to the evaporating dish near to the water supply of water based on the evaporating dish, with the water pump of the water supply unit The amount of water delivered can be adjusted. Alternatively, it is possible to prevent emptying of the evaporating dish by controlling the heater based on the temperature information of the temperature detector. In this way, during cooking, the amount of generated steam can be adjusted by controlling the heater or the supply of water, and cooking can be performed with the optimum amount of steam for food.
[0012]
Further, when the temperature of the steam generating unit reaches a predetermined temperature, water is supplied on the assumption that the water in the steam generating unit is low. Although the temperature of the steam generating unit decreases when water is supplied, the temperature does not decrease immediately after the water is supplied, and the temperature starts decreasing after the temperature has once increased. This phenomenon is generally referred to as overshoot. If there is a temperature drop, it can be determined that water has been reliably supplied. In consideration of the overshoot at this time, the determination whether or not to perform the next water supply is not performed until a predetermined time elapses. As a result, it is possible to avoid a situation in which the water is continuously supplied from the evaporating dish due to the high temperature of the steam generating section, the water overflows from the evaporating dish, and the water flows out into the cabinet. In other words, it is possible to prevent the overflow of water from the steam generation part due to excessive supply of water and to improve safety.
[0013]
Further, when the temperature of the steam generating unit reaches a predetermined temperature, water is supplied on the assumption that the water in the steam generating unit is low. Although the temperature of the steam generating unit decreases when water is supplied, the temperature does not decrease immediately after the water is supplied, and the temperature starts decreasing after the temperature has once increased. This phenomenon is generally referred to as overshoot. If there is a temperature drop, it can be determined that water has been reliably supplied. Whether or not to perform the next water supply, considering that there is a risk of excessive supply of water if the temperature of the steam generating unit is higher than the predetermined temperature and water is supplied with this temperature drop. This determination is not performed unless the temperature of the steam generating part has increased. As a result, it is possible to avoid a situation in which the water is continuously supplied from the evaporating dish due to the high temperature of the steam generating section, the water overflows from the evaporating dish, and the water flows out into the cabinet. In other words, it is possible to prevent the overflow of water from the steam generation part due to excessive supply of water and to improve safety.
[0014]
Further, in cooking for generating a gas steam adjusts the control to generate steam amount supplied of water by the heater and the water supply pump, and subjected to steam heating at optimum amount of steam to the food. Since steam is generated from the steam generation unit in the heating chamber, if water is supplied until the end of cooking, water remains in the evaporating dish of the steam generation unit after cooking is completed. If you start to cook using steam, immediately cancel the cooking operation, and immediately start cooking using steam, the water in the evaporating dish There is a risk of overflow of water from the steam generator due to excessive supply. Therefore, when cooking using steam is started, the elapsed time since the water supply operation during the previous cooking has passed for a predetermined time or more, and the temperature in the steam generating unit has reached the predetermined temperature within the elapsed time. If not, it was assumed that water remained, and water supply was not performed at the start of cooking. As a result, it is possible to avoid the risk of overflow of water from the steam generation part due to excessive supply of water, and safety can be improved.
[0015]
The high-frequency heating device with a steam generation function according to claim 2, a heating chamber that accommodates an object to be heated, a steam generation unit that generates steam in the heating chamber, and a temperature detection unit that detects a temperature of the steam generation unit A water supply means for supplying water to the steam generation section; and a water supply control means for controlling the supply of water in the water supply section, and the supply of the steam generation section within a predetermined time from when the supply of steam is stopped. Water is supplied when the temperature rises and exceeds a predetermined temperature.
[0016]
In the heating state in which steam is used, the heating control of the heater and the water supply of the water supply unit are controlled based on the temperature information of the temperature detection unit that detects the temperature of the steam generation unit.
[0017]
When the steam is stopped, if the amount of residual water in the evaporating dish in the steam generating part is small at that time, the residual water in the evaporating dish in the steam generating part immediately evaporates due to the residual heat of the heater, and the temperature of the steam generating part Since the water is supplied when the temperature rises and the temperature is higher than a predetermined temperature, it is possible to prevent a risk that the evaporating dish becomes empty.
[0018]
The high-frequency heating device with a steam generation function according to claim 3 is a failure when water is not supplied at all within a predetermined time even when cooking for generating steam is performed and heating control of the heater is performed. It is detected that there exists.
[0019]
In this high-frequency heating apparatus with a steam generating function, cooking is performed to generate steam, and heating control of the heater and water supply to the steam generating section are performed. When the heater breaks or the steam generating unit fails, the temperature of the steam generating unit does not rise, and water is not supplied to the evaporating dish at all, resulting in a risk of cooking failure. If the heater breaks or the steam generation unit fails and no water is supplied to the evaporating dish during the specified time, it is considered a failure and the cooking is discontinued to inform the user of the abnormality and promptly It can be connected to a response such as a repair.
[0020]
The high-frequency heating apparatus with a steam generation function according to claim 4 is a heating chamber that accommodates an object to be heated, a steam generation unit that generates steam in the heating chamber, and a temperature detection unit that detects a temperature of the steam generation unit. A control unit, heater heating control means for controlling the heating of the heater of the steam generation unit, water supply means for supplying water to the steam generation unit, and water supply control means for controlling the supply of water The control unit, in the high-frequency heating apparatus that performs at least one of the heater heating control and the water supply control based on the temperature information of the temperature detection means, the removable water storage tank and the attachment / detachment information of the water storage tank. A tank attachment / detachment detection means for detecting, and a water supply means for supplying water to the steam generating section; after the cooking using steam is performed and the water is supplied, the water storage tank To the user By detecting that the water has been pulled out, the water supply control means performs a water supply operation to forcibly discharge the water staying in the pipe connecting the water storage tank to the steam generation unit to the steam generation unit. It is characterized by that.
[0021]
In this high-frequency heating device with a steam generating function, steam is generated from the steam generating section in the heating chamber, so that water remains in the pipe connecting the water storage tank to the steam generating section and is left as it is. In the next cooking, not only will the old remaining water be used, but the water itself may rot if left untreated for a long time. When the water storage tank is pulled out by the user, the water supply operation is performed to discharge the water staying in the pipe connecting the water storage tank to the steam generation section to the steam generation section. It is possible to prevent water from remaining in the inside and keep the inside of the pipe line hygienic.
[0022]
【Example】
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a high-frequency heating device with a steam generation function of the invention will be described in detail with reference to the drawings.
[0023]
FIG. 1 is a front view showing a state in which the open / close door of the high-frequency heating apparatus with a steam generating function of the first embodiment is opened, FIG. 2 is a perspective view showing an evaporating dish of a steam generating section used in this apparatus, and FIG. The perspective view which shows the evaporating dish heater of a generation | occurrence | production part and a reflecting plate, FIG. 4 is sectional drawing of a steam generation part.
[0024]
The high-frequency heating device 100 with a steam generating function is a heating cooker that supplies a high-frequency (microwave) and steam to the heating chamber 11 that houses the object to be heated to heat the object to be heated. A magnetron 13 as a high-frequency generator for generating a high frequency, a steam generator 15 for generating steam in the heating chamber 11, a circulation fan 17 for stirring and circulating the air in the heating chamber 11, and the heating chamber 11 And a convection heater 19 as a room air heater for heating the air circulating in the air.
[0025]
The heating chamber 11 is formed inside a box-shaped main body case 10 that is open to the front, and an open / close door 21 with a translucent window 21 a that opens and closes a heated object outlet of the heating chamber 11 is formed on the front surface of the main body case 10. Is provided. The open / close door 21 can be opened and closed in the vertical direction by the lower end being hinged to the lower edge of the main body case 10. A predetermined heat insulating space is secured 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 necessary. In particular, the space behind the heating chamber 11 is a circulation fan chamber 25 that accommodates the circulation fan 17 and its drive motor 23 (see FIG. 9), and the rear wall of the heating chamber 11 is the heating chamber 11 and the circulation fan. A partition plate 27 that defines the chamber 25 is formed. The partition plate 27 has an intake vent hole 29 for sucking air from the heating chamber 11 side to the circulation fan chamber 25 side, and an air vent hole 31 for blowing air from the circulation fan chamber 25 side to the heating chamber 11 side. Different formation areas are provided. Each ventilation hole 29 and 31 is formed as many punch holes.
[0026]
The circulation fan 17 is arranged with the center of rotation positioned 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. It has been. The intake vent holes 29 formed in the partition plate 27 are disposed in front of the circulation fan 17, and the blower vent holes 31 are disposed along the rectangular annular convection heater 19. When the circulation fan 17 is turned, the air is set so as to flow from the front surface side of the circulation fan 17 to the rear surface side where the drive motor is located, so that the air in the heating chamber 11 passes through the intake vent holes 29 and The air is sucked into the central portion, passes through the convection heater 19 in the circulation fan chamber 25, and is sent out into the heating chamber 11 from the ventilation hole 31 for blowing air. Therefore, by this flow, the air in the heating chamber 11 is circulated through the circulation fan chamber 25 while being stirred.
[0027]
The magnetron 13 is disposed, for example, in a space below the heating chamber 11, and a stirrer blade 33 is provided at a position for receiving a high frequency generated from the magnetron. Then, by irradiating the rotating stirrer blade 33 with the high frequency from the magnetron 13, the high frequency is supplied into the heating chamber 11 while being stirred by the stirrer blade 33. Note that the magnetron 13 and the stirrer blade 33 are not limited to the bottom of the heating chamber 11, but can be provided on the upper surface or the side of the heating chamber 11.
[0028]
As shown in FIG. 2, the steam generating unit 15 is disposed below the evaporating dish 35 having a water reservoir 35 a that generates steam by heating and a protruding surface 36, and FIGS. 3 and 4. As shown in FIG. 2, the evaporating dish heating heater 37 for heating the evaporating dish 35 and a reflecting plate 39 having a substantially U-shaped cross section for reflecting the radiant heat of the heater toward the evaporating dish 35 are configured. The temperature detector 20 is disposed below the evaporating dish 35 and outside the reflector plate 39. The evaporating dish 35 is in the form of a metal elongated plate, and is a partition that defines the heating chamber 11 and the circulation fan chamber 25 in the longitudinal direction on the back bottom surface of the heating chamber 11 opposite to the heated object outlet. It is arranged in a direction along the plate 27. As the evaporating dish heater 37, a glass tube heater, a sheathed heater, a plate heater, or the like can be used.
[0029]
As shown in FIGS. 5 and 6, 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 the water storage tank 53. And a conduit 57 connecting up to the evaporating dish 35.
[0030]
According to this structure, since water can be continuously supplied to the evaporating dish 35, a long-time continuous steam heating process can be performed. Note that the water storage tank 53 is a cartridge type as shown in FIG. 6 which is a partial perspective view of the side of the apparatus, so as to improve handling, so that the apparatus itself does not increase in size when incorporated in the apparatus. The body case 10 is compactly embedded in a side wall portion that is unlikely to be relatively hot. In addition, the heat treatment may be performed and disposed on the upper surface side of the apparatus, or may be disposed on the lower surface side. It is preferable that the cartridge-type water storage tank 53 can be taken out from the outside of the apparatus and can be easily replaced. This makes it possible to improve handling and facilitate cleaning of the tank. For example, as shown in the figure, the lid 59 may be opened / closed from the side surface of the apparatus and may be inserted / removed from / to the front side of the apparatus. The cartridge-type water storage tank 53 is formed of a transparent material such as resin or glass, and the wall on the main body case side of the tank storage portion is also formed of a transparent material, so that the remaining amount of water in the water storage tank 53 is outside. It is preferable to configure so that it can be visually confirmed.
[0031]
FIG. 7 is a block diagram of a control system for controlling the high-frequency heating device 100 with a steam generation function. This control system is configured around a control unit 501 including 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 temperature detection unit 20, the heating unit 511, the cooling fan 61, and the like. .
[0032]
The input operation unit 507 includes various operations such as a start switch 519 for instructing the start of heating, a changeover switch 521 for switching a heating method such as high-frequency heating and steam heating, and an automatic cooking switch 523 for starting a program prepared in advance. The switch is connected.
[0033]
The heating unit 511 is connected to a high frequency generator 13, a steam generator 15, a circulation fan 17, and the like. The high frequency generator 13 operates in cooperation with a radio wave agitator (stirler blade drive unit) 33. The steam generator 15 includes an evaporating dish heater 37, an indoor air heater 19 (convection heater), and the like. Is connected.
[0034]
Next, the basic operation of the above-described high-frequency heating apparatus 100 with a steam generation function will be described with reference to the flowchart of FIG.
[0035]
As an operation procedure, first, food to be heated is placed on a dish or the like and placed in the heating chamber 11, and the open / close door 21 is closed. Then, the heating method, the heating temperature, or the time is set by the input operation unit 507 (step 10; hereinafter abbreviated as S10), and the start switch is turned on (S11). Then, a heating process is automatically performed by the operation of the control unit 501 (S12).
[0036]
That is, the control unit 501 reads the set heating temperature / time, selects and executes the optimum cooking method based on the read temperature / time, and determines whether the set heating temperature / time has been reached (S13). When the set value is reached, each heating source is stopped and the heating process is terminated (S14). In S12, steam generation, room air heater, circulation fan rotation, and high frequency heating are performed individually or simultaneously.
[0037]
In the above operation, for example, an operation when the mode of “steam generation + circulation fan ON” is selected and executed will be described. When this mode is selected, as shown in the operation explanatory diagram of the high-frequency heating device 100 in FIG. 9, when the evaporating dish heater 37 is turned on, 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 the intake vent hole 29 provided in the substantially central portion of the partition plate 27, and passes through the circulation fan chamber 25 to surround the partition plate 27. It blows out toward the inside of the heating chamber 11 from the ventilation hole 31 for ventilation provided in the part. The blown-out steam is stirred in the heating chamber 11 and again sucked into the circulation fan chamber 25 side from the intake vent hole 29 at the substantially central portion of the partition plate 27. Thereby, a circulation path is formed in the heating chamber 11 and the circulation fan chamber 25. The generated steam is guided to the intake vent hole 29 without providing the ventilation vent hole 31 below the position where the circulation fan 17 is disposed on the partition plate 27. Then, as shown by the white arrow in the figure, the steam circulates through the heating chamber 11, so that the steam is blown onto the article to be heated M.
[0038]
Next, the control method of the high frequency heating apparatus with a steam generation function having the above-described configuration will be described in detail.
[0039]
FIG. 10 is a flowchart showing a basic procedure for controlling the evaporating dish heater 37 and the water feed pump 55 in accordance with the temperature of the evaporating dish 35. In this flowchart, the steam dish heater 37 is first energized. The energization is basically continuous energization, but when a load such as another heater is energized and exceeds the allowable power amount, it is de-energized. Depending on the menu, even if the allowable power amount is not exceeded, intermittent energization may be performed, continuous energization may be performed at the start, and a predetermined time may elapse thereafter, or the temperature of the temperature detection unit 20 of the steam generation unit may reach a predetermined temperature. Intermittent energization may be performed under various conditions such as Next, a water supply determination at start is performed (S21), and it is determined whether or not to supply water at start. The determination method will be described later with reference to FIG. When it is determined that the water supply is OK in the process of S21 at the start (S22), the water supply pump 55 is driven to supply water to the evaporating dish 35 (S23). The amount of water supply is determined by the driving time of the water supply pump 55, and the driving time can be arbitrarily set according to the selected cooking menu, and the amount of steam corresponding to the cooking menu can be controlled. If the temperature of the evaporating dish 35 is high, a large amount of water is supplied, and a large amount of steam is generated at one time. If the temperature of the evaporating dish 35 is low, a small amount of water is supplied, and the evaporating dish heater 37 Can be energized to heat the evaporating dish 35 and quickly generate steam. When water supply is performed, a water supply determination mask time is set (S24), and the next water supply is not performed until the water supply determination mask time elapses. Details will be described later with reference to the flowchart of FIG.
[0040]
Next, the temperature rise value of the temperature detection unit 20 of the steam generation unit or the air scoring determination based on the absolute temperature is performed (S25). This airing determination method will be described later in detail with reference to the flowchart of the airing determination method in FIG. When it is determined that it is not air-fired (S26), water supply determination based on the temperature of the temperature detection unit 20 of the steam generation unit is performed (S27). This water supply determination method will be described later in detail in the water supply determination flowchart of FIG. When it determines with water supply OK (S28), the water pump 55 is driven and water is supplied to the evaporating dish 35 (S29). The amount of water supply is determined by the driving time of the water supply pump 55, and the driving time can be arbitrarily set according to the selected cooking menu, and the amount of steam corresponding to the cooking menu can be controlled. When water supply is performed, a water supply determination mask time is set (S24), and the next water supply is not performed until the water supply determination mask time elapses. Details will be described later with reference to the water supply determination flowchart of FIG. Thereafter, the process returns to the state of (S25).
[0041]
If the determination in (S26) results in an emptying state, the evaporating dish heater 37 is turned off (S31), and a return determination from the emptying state is performed (S32). Details will be described later with reference to FIG. If it is determined that the return from the empty state is OK (S33), energization of the evaporating dish heater 37 is resumed (S34), the normal state is restored, and the determination returns to S25.
[0042]
Next, a method for determining whether or not to supply water at the start of S21 in FIG. 10 will be described with reference to FIG. First, when cooking that generates steam has been performed before and water has been supplied during the cooking, the elapsed time from the time when the water was supplied is measured. In addition, the temperature of the steam generator is also measured. At the start of cooking, if the elapsed time is equal to or longer than the predetermined time (S35), and the temperature of the temperature detection unit 20 of the steam generation unit is equal to or higher than the predetermined temperature during the elapsed time (S36). The water supply determination at the start of cooking is determined to be OK (S37). In other conditions, NG is assumed (S38), and water supply at the start of cooking is performed. It should be noted that the predetermined time and the predetermined temperature described here may be fixed values, and arbitrary time and temperature may be set by a menu at the time when steam is generated previously. In addition, when cooking using the first steam after the power is turned on, water supply at the start is performed unconditionally. The water supply at the start may not be unconditionally performed.
[0043]
Next, with reference to FIG. 12, a description will be given of the flying determination method in S25 in FIG. When the temperature of the temperature detection unit 20 of the steam generation unit is a predetermined temperature (S39), or when there is a temperature increase equal to or higher than the temperature increase comparison value within a predetermined time (S40), it is determined that the air is burned (S41). ). In other conditions, it is determined that the image is not burned (S42). Note that the predetermined temperature and predetermined time and temperature rise comparison value described here may be fixed values, or arbitrary time, comparative value, and temperature may be set by a menu for generating steam.
[0044]
Next, the water supply determination method of S27 in FIG. 10 will be described using FIG. When there is no water supply determination mask time, or when water has been supplied before and the water supply determination mask time has elapsed (S43), the temperature of the temperature detection unit 20 of the steam generation unit is equal to or higher than a predetermined temperature (S44), and steam is generated. When the temperature detection unit 20 of the part is rising (S45), it is determined that the water supply is OK (S46). Further, when the water supply is not performed for a predetermined period of time or longer (S47), it is considered that the evaporating dish heater 37 is disconnected or the steam generating unit 15 is broken, and the heating is forcibly performed. Is stopped (S49). In the case of other conditions, it determines with water supply NG (S48).
[0045]
Next, with reference to FIG. 14, the return determination method from the idle state in S32 in FIG. 10 will be described. When it is determined that the watering is performed, first, the water supply pump 55 is driven to supply water to the evaporating dish 35 (S50). The amount of water supply is determined by the driving time of the water supply pump 55, and the driving time may be a fixed value or can be arbitrarily set by the selected cooking menu. Next, the temperature of the temperature detection unit 20 of the steam generation unit at the time when it is determined that the air is burned is stored as a peak temperature, and then the peak temperature is updated when the temperature increases (S51). Then, it is determined whether or not the temperature of the temperature detection unit 20 of the steam generation unit has decreased by a predetermined temperature with respect to the peak temperature (S52). Remove the whisper. However, the recovery from the empty heating state is delayed until the temperature of the temperature detection unit 20 of the steam generation unit falls below the predetermined temperature used for the empty heating determination (S53). As a result, when the temperature of the temperature detection unit 20 of the steam generation unit is equal to or higher than the predetermined temperature used for the determination of airing after returning from the airing state, it is prevented from returning to the airing state immediately. After that, when the temperature of the temperature detection unit 20 of the steam generation unit falls below the predetermined temperature used for the airing determination, the recovery from the airing state is OK (S54). As a result of the determination in S52, if the airing state continues, when the airing return detection time has elapsed (S55), the airing return detection time is cleared (S56), and the number of airing return determinations is counted (S57). It is determined whether or not the number of determinations for returning to air reaches a predetermined value, that is, the upper limit of the number of redo determinations for returning from empty air (S58). If the upper limit is not reached, water is supplied again (S59), and the process returns to S51. When the upper limit is reached, heating is forcibly stopped, cooking is stopped, and an initial mode or a mode for displaying abnormal contents is set (S60).
[0046]
Next, the water supply operation when the steam is stopped from the state where the steam is generated will be described. Even if the steam is stopped and the evaporating dish heater 37 is turned off, if the amount of water in the evaporating dish 35 is small due to the residual heat of the evaporating dish heater 37, the temperature of the evaporating dish 35 rises rapidly, and the empty cooking state There is a fear of becoming. In order to prevent this, water supply is performed when the temperature of the evaporating dish 35 suddenly rises within a predetermined time. As a result, it is possible to avoid an empty state. Further, when a predetermined time has passed, no water is supplied no matter how the temperature of the evaporating dish 35 rises. This is because a menu that does not use steam is used to prevent water from being accidentally supplied to the evaporating dish 35 when a heating chamber such as a heater becomes hot. The predetermined time may be a fixed value or may be arbitrarily set by a selected cooking menu.
[0047]
The water supply section has a detachable water storage tank 53 and a tank attachment / detachment switch 54 for detecting the attachment / detachment state of the water storage tank 53. After cooking using steam, the water pump 55 is driven, and water is supplied, when the water storage tank 53 is removed by the user, the tank attachment / detachment switch 54 detects that the water storage tank 53 has been removed. Then, by driving the water pump 55 for a predetermined time, water staying in the pipe 57 connecting the water storage tank 53 to the evaporating dish 35 is discharged to the evaporating dish. Thereby, it is possible to prevent water from remaining in the pipe line 57 and to keep the inside of the pipe line 57 hygienic.
[0048]
Thus, according to the high frequency heating apparatus with a steam generation function of the present embodiment, since the steam is generated not inside the heating chamber 11 but inside, similarly 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, etc. in the water may be concentrated and settled and fixed to the bottom of the evaporating dish 35. However, the material adhering to the surface of the evaporating dish 35 is wiped off with a cloth or the like. Just wipe clean. Moreover, since the water supply pump which supplies water to the evaporating dish 35 finishes the operation before the cooking is finished, the water does not remain after the cooking is finished, and if the water remains after the cooking is finished, the evaporating dish is heated. Since the residual water of the evaporating dish evaporates due to the residual heat of the heater, wiping is easy and it becomes easy to always keep the inside of the heating chamber 11 in a sanitary environment.
[0049]
Furthermore, in this high-frequency heating device, steam is generated by heating the evaporating dish 35 with the evaporating dish heater 37, so that the steam can be efficiently supplied with a simple structure. Furthermore, since steam having a certain high temperature is generated by heating, cooking by simply humidifying or cooking by heating while preventing drying in combination with high-frequency heating is also possible.
[0050]
In addition, the water supply amount of the water supply unit can be adjusted based on the temperature information of the temperature detection unit to control the generation of the optimum amount of steam according to food, and steam generation due to insufficient water supply Water can be prevented from overflowing from the steam generation part due to excessive air supply and excessive supply of water, and safety can be improved.
[0051]
In addition, the temperature of the temperature detection unit rises during a predetermined time after heating using the steam is stopped, and when the predetermined temperature is reached, water supply is performed to empty the steam generation unit. Can be prevented and safety can be improved.
[0052]
In addition, as a heating method, both high-frequency heating and steam heating can be performed simultaneously, either one can be performed individually, or both can be performed in a predetermined order. An appropriate heating method can be arbitrarily selected depending on whether it is a refrigerated product or the like. In particular, when high-frequency heating and steam heating are used in combination, the temperature increase rate of the object to be heated can be increased, so that efficient cooking is possible.
[0053]
【The invention's effect】
As described below, according to the present invention, by controlling the temperature of the steam generation unit and the supply of water, it is possible to generate an optimal amount of steam for food and to improve safety to prevent abnormalities such as airing in advance. it can.
[Brief description of the drawings]
FIG. 1 is a front view showing a state where a door of a high-frequency heating apparatus with a steam generation function is opened in an embodiment of the present invention. FIG. 2 is an evaporating dish of a steam generation unit used in the high-frequency heating apparatus with a steam generation function of FIG. FIG. 3 is a perspective view showing an evaporating dish heater and a reflecting plate in a steam generating section. FIG. 4 is a sectional view of the steam generating section of the apparatus. FIG. 5 is a high-frequency heating apparatus with a steam generating function of the present invention. FIG. 6 is an explanatory view showing a removable water storage tank. FIG. 7 is a block diagram of a control system for controlling a high-frequency heating apparatus with a steam generation function. FIG. 8 is with a steam generation function. Flowchart explaining basic operation of high-frequency heating device [FIG. 9] Operation explanatory diagram of high-frequency heating device with steam generation function [FIG. 10] When controlling evaporating dish heater and water supply unit according to the temperature of evaporating dish Basic hands Flow chart showing the order [FIG. 11] Flow chart showing the basic procedure for determining whether or not to supply water to the evaporating dish at the start of steam heating. [FIG. 12] Empty evaporating dish according to the temperature of the evaporating dish. FIG. 13 is a flowchart showing a basic procedure for determining whether or not to supply water to the evaporating dish according to the temperature of the evaporating dish. FIG. 14 is a flowchart showing a basic procedure for determining a condition for returning from an empty state.
11 Heating chamber 13 Magnetron (High frequency generator)
15 Steam generation part 20 Temperature detection part (temperature detection means)
35 Evaporating dish 37 Evaporating dish heater 39 Reflector 51 Water supply unit 55 Water supply pump 501 Control unit

Claims (4)

A heating chamber that accommodates an object to be heated, a steam generation unit that generates steam in the heating chamber, temperature detection means that detects the temperature of the steam generation unit, a control unit, and heating of the heater of the steam generation unit Heater heating control means for controlling, water supply means for supplying water to the steam generating section, and water supply control means for controlling the supply of water, the control section based on temperature information of the temperature detecting means to, in the row cormorants high-frequency heating device at least one control of the water supply control and heater control, the water supply control means, the temperature and the elapsed time information of the temperature detecting means from the time of water in the previous cooking time A high frequency heating apparatus characterized by determining whether or not to supply water at the start of cooking.   A heating chamber that accommodates an object to be heated, a steam generation unit that generates steam in the heating chamber, a temperature detection unit that detects the temperature of the steam generation unit, and a water supply unit that supplies water to the steam generation unit And a water supply control means for controlling the supply of water. The water supply control means stops the steam generation, and then the temperature of the steam generating section rises within a predetermined time, and is equal to or higher than the predetermined temperature. A high-frequency heating device characterized by supplying water in some cases.   3. The high frequency according to claim 1, wherein a failure is detected when water is not supplied at all for a predetermined time based on the control state of the heater heating control means and the water supply means during cooking that generates steam. Heating device. A heating chamber that accommodates an object to be heated, a steam generation unit that generates steam in the heating chamber, temperature detection means that detects the temperature of the steam generation unit, a control unit, and heating of the heater of the steam generation unit Heater heating control means for controlling, water supply means for supplying water to the steam generating section, and water supply control means for controlling the supply of water, the control section based on temperature information of the temperature detecting means In addition, in the high-frequency heating apparatus that performs at least one of heater heating control and water supply control, a detachable water storage tank, and tank attachment / detachment detection means for detecting attachment / detachment information of the water storage tank, It is detected by the detection signal from the tank attaching / detaching means that the storage tank has been removed by the user, and the water supply means performs the water supply operation, thereby forcing the water remaining in the path from the water supply means to the steam generator. High-frequency heating apparatus characterized in that for discharging the.

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