JP3553742B2 - Microwave heating equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a microwave heating device that heats and cooks food quickly while maintaining the quality of the food.
[0002]
[Prior art]
This type of microwave heating apparatus is configured as shown in FIG.
A microwave heating device main body 1 (hereinafter, referred to as a main body) is provided with a heating chamber 3 for accommodating an object to be heated 2 and a steam generator 4 provided outside the heating chamber 3. The steam generating device 4 includes a steam generating chamber 6 having a sheath heater 5 attached to the outer peripheral surface thereof, and a water supply tank 7 communicating with the steam generating chamber 6.
[0003]
The heating target 2 is heated and cooked by the microwave 9 generated from the magnetron 8 and the steam 10 heated by the sheath heater 5 and flowing from the steam generating chamber 6 into the heating chamber 3.
[0004]
[Problems to be solved by the invention]
By heating and cooking with the microwave 9 and the steam 10 in this way, compared to the case of cooking alone with the microwave 9, the food is kept in the room by the steam, and the food is uniformly heated by the steam, so that the food is better. Can be cooked.
[0005]
However, in the conventional microwave heating apparatus, as shown in FIG. 21, a rise time of 2 minutes to 4 minutes is required from when the sheath heater 5 is energized to when steam is actually generated, and it takes time to cook. The steam 10 is continuously supplied to the heating chamber 3 for 1 to 2 minutes even after the energization of the sheath heater 5 is terminated, which is dangerous when removing the article 2 to be heated from the heating chamber 3.
[0006]
Further, when the steam 10 is supplied to the heating chamber 3, the steam 10 comes into contact with the wall surface of the heating chamber 3 and dew condensation occurs. When such dew condensation occurs, the microwaves 9 are absorbed by the dew condensation, resulting in non-uniform radio wave distribution in the interior of the heating chamber 3, and uniform heating by the microwaves 9 cannot be performed.
[0007]
Furthermore, there is a problem that the heating chamber 3 is likely to be unsanitary if the dew is generated as described above.
It is an object of the present invention to provide a microwave heating device that can reduce the condensation in the heating chamber 3 when cooking with microwaves 9 and steam 10.
[0008]
In addition, the present invention provides a microwave heating apparatus that can cook quickly when heating with microwaves 9 and steam 10, is safe without generating steam when taking out food, and can reduce condensation in the heating chamber 3. The purpose is to provide.
[0009]
[Means for Solving the Problems]
The microwave heating apparatus according to the present invention is characterized in that a heat storage plate is provided in the heating chamber, the heat storage plate being configured to generate heat and receive heat by receiving microwave irradiation from the microwave generation means.
[0010]
According to the present invention, it is possible to obtain a microwave heating apparatus capable of reducing dew condensation due to steam supplied to the heating chamber and realizing uniform heating cooking by microwaves.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Of the present invention The microwave heating device is a microwave heating device having microwave generating means for irradiating a heating chamber for accommodating an object to be heated with microwaves, and steam generating means for supplying steam to the heating chamber. Is provided with a heat storage plate that generates heat by receiving microwave irradiation from the microwave generation means and stores heat, thereby reducing the dew condensation due to the steam in the heating chamber.
[0012]
In particular, claim 1 The microwave heating device described , Steam The gas generating means is composed of an exciting coil disposed outside the steam generating chamber, and a foamed or fibrous metal body disposed inside the steam generating chamber. It is characterized in that it is configured to drop water.
[0013]
Claim 5 The microwave heating device described , Accumulation The heating plate is provided on at least one of the upper, lower, left, right, and rear end surfaces forming the heating chamber.
Claim 6 The microwave heating device described , Accumulation The heating plate is arranged at least one of a position above and below the placement position of the object to be heated in the heating chamber.
[0014]
Claim 2 The microwave heating device described , Steam Prior to the supply of steam to the heating chamber by the gas generating means, a control means for operating the microwave generating means to preheat the heat storage plate to a specified temperature is provided.
[0015]
Claim 7 The microwave heating device described , An outlet for discharging steam from the lower part of the heat chamber to the upper part of the heat chamber is provided.
Claim 8 The microwave heating device described , A support shelf that covers the side wall of the heat chamber and supports the end of the heat storage plate is provided, and the support shelf is provided with steam upward toward a position corresponding to a steam outlet formed below the side wall of the heating chamber. A vapor direction guide for discharging is formed.
[0016]
Claim 3 The microwave heating device described , Accumulation The length of the heating plate in the depth direction is set to be shorter than the length of the heating chamber in the depth direction, and the gap between the wall surface of the heating chamber and the heat storage plate set in the heating chamber is used for the microwave generation means. It is characterized in that the oscillating tube is configured to be cooled and warm air flows thereinto.
[0017]
The microwave heating device according to claim 9 is , The boiler outlet of the steam generating means is connected to a steam outlet formed below the side wall of the heat chamber, and the lower level of the steam outlet is higher than the lower level of the boiler outlet.
[0018]
The microwave heating device according to claim 10 is , Steam The air generating means is characterized in that the water is sucked up from the water supply tank by a pump via a water treatment material cartridge attached to the water supply tank and supplied with water.
[0019]
The microwave heating device according to claim 11 is , Steam A control unit is provided for judging the replacement time of the water treatment material cartridge based on the operation time of the pump for sucking water from the air generation means or the water supply tank or the integrated value of the water supply amount, and notifying the user of the time.
[0020]
The microwave heating device according to claim 12 is ,water A control unit is provided which stops the operation by detecting that the time to replace the processing material cartridge is approaching, detects a restart input operation during the operation stop, and permits the operation only for a specified period. And
[0021]
The microwave heating device according to claim 13 is , Ma A drain tank is provided below the main body of the microwave heating device to receive dew water in the heating chamber and boiler drain in the steam generating means.
[0022]
Claim 4 Microwave heating equipment , Wait When a preheating start instruction is detected in the machine, the microwave generating means is operated prior to the steam generating means, and the heating chamber is preheated to the first target temperature by the microwave generating means and the steam generating means. If no operation is detected, a control means is provided for preheating the heating chamber by switching the preheating target temperature to a second target temperature lower than the first target temperature.
[0023]
Claim 14 The microwave heating device described , Accumulation The hot plate is made by applying a glaze to the entire surface of the plate-shaped pottery or porcelain and firing it, and the portion of the glaze is heated by microwave irradiation, and the heat is stored in the pottery or porcelain It is characterized.
[0024]
Claim Fifteen The microwave heating device described , Exchange An input means for inputting a set value of the replacement time is provided.
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0025]
As shown in FIGS. 1 to 3, a main body 1 in which a heating chamber 3 for housing an object to be heated 2 is formed has a heating chamber 3 and a microwave generator for radiating microwaves to the heating chamber 3. A means 11 and a steam generating means 12 for generating steam to be supplied to the heating chamber 3 are incorporated.
[0026]
A first door 13 that opens and closes an opening on the front surface of the heating chamber 3 is pivotally supported by the main body 1 so as to be openable and closable, and is opened and closed when the object 2 to be heated is put in and out of the heating chamber 3. A second door 14 provided on the left side of the first door 13 is pivotally supported on the main body 1 by a shaft 16 so that the second door 14 can be opened and closed when a water supply tank 15 used in the steam generating means 12 to be described later is described in detail. ing. Reference numeral 17 denotes a window formed in the second door 14 so that the water level of the water supply tank 15 can be visually checked.
[0027]
The microwave generating means 11 includes a magnetron 8 provided outside the heating chamber 3, an antenna 18 provided on the ceiling of the heating chamber 3, and a coaxial for feeding the microwave generated by the magnetron 8 to the antenna 18. The magnetron 8 is forcibly air-cooled by a blower 20.
[0028]
First, the structure of the heating chamber 3 and components set therein will be described.
As shown in FIG. 4, each part as shown in FIG. 5 is set in the inside of the heating chamber 3 in which the upper, lower, left and right surfaces and the surface on the far end side are formed in a box shape with a stainless steel plate.
[0029]
First, the top board 21 is set with the first door 13 opened. The top plate 21 is provided so that the antenna 18 is not exposed. The top plate 21 has a projection 21 a formed at the back end inserted into a hole 22 formed in the upper portion of the back end surface of the heating chamber 3, and elastic portions integrally formed on both sides of the front end of the top plate 21. The projection 21c of the heating chamber 21b is set by engaging with a hole 23 formed in the upper part of the left and right wall surfaces of the heating chamber 3.
[0030]
Next, support shelves 24a and 24b are set inside the left and right wall surfaces of the heating chamber 3. The upper portions of the support shelves 24a and 24b are engaged with and held by the elastic portions 21b of the top plate 21 as shown in FIG. A support rail 25 is formed integrally with the support shelves 24a and 24b.
[0031]
The support shelf 24a and the support shelf 24b have the same shape in consideration of usability.
The mounting plate 27 in which a number of holes 26 are formed is inserted into the heating chamber 3 along the support rails 25 of the support shelves 24a and 24b, and the object 2 to be heated is mounted on the mounting plate 27. On the support shelves 24a and 24b, heat storage plates 28a and 28b are set up and down with respect to the position where the placing plate 27 is set.
[0032]
The heat storage plates 28a and 28b are formed by applying a glaze 30 to the entire surface of a plate-shaped mullite quartz porcelain 29 as shown in FIG. 7, and the portions of the glaze 30 generate heat when subjected to microwave irradiation. Then, the heat is stored in the mullite quartz porcelain 29.
[0033]
The steam generating means 12 is configured as shown in FIG.
The steam generating means 12 includes a boiler 31 attached to the main body 1, an excitation coil 32 wound around the outside of the boiler 31, and a foamed or fibrous metal body arranged inside the boiler 31. 33, and a water supply tank 15 that can be attached to and detached from the main body 1 and the like.
[0034]
When the water supply tank 15 is mounted on the bottom plate 34 with the second door 14 opened, the water supply tank 15 is attached to the connection port 35 attached to the main body 1. The fifteen nozzles 36 are inserted, the hooks 37 attached to the main body 1 are engaged with the water supply tank 15, and the movement is regulated to complete the operation.
[0035]
The connection port 35 is connected to a suction port of a pump 39 via a pipe 38a, and a discharge port of the pump 39 is connected to an upper part of the boiler 31 via a pipe 38b. Is dropped.
[0036]
A water treatment material cartridge (ion exchange resin cartridge) 40 is attached to the water supply tank 15, and when the pump 39 is operated, water in the water supply tank 15 is sucked up through the water treatment material cartridge 40, and the tap water is supplied. Is supplied to the boiler 31.
[0037]
The metal body 33 has a cylindrical shape, and a disc-shaped unfired chip 41 is mounted on the upper end of the metal body 33, and a heat-resistant ceramic paper 42 is mounted on the unfired chip 41. Although the unbaked chips 41 have good water retention, the water absorption rate is not so fast. On the other hand, the ceramic paper 42 cannot expect water retention but has a high water absorption rate.
[0038]
Therefore, the water dropped from the upper part of the boiler 31 is quickly absorbed by the ceramic paper 42 and diffused throughout the ceramic paper 42, uniformly absorbed by the unfired chips 41 from the ceramic paper 42, Water flows down via 33.
[0039]
When the exciting coil 32 is excited, the metal body 33 is rapidly heated to a high temperature state by induction heating, so that water flowing down the metal body 33 evaporates immediately on the way and is blown out as steam 10 from the steam discharge port 43.
[0040]
The steam 10 blown out from the steam discharge port 43 is discharged upward from a position below the heating chamber 3 through a blow port configured as follows.
The steam outlet 43 is attached to a steam outlet 44 formed in a lower portion of the left wall surface 3a of the heating chamber 3 so as to face the steam outlet 44. The steam outlet 43 corresponds to the steam outlet 44 on the support shelf 24a. As shown in FIGS. 3 and 5, a steam direction guide 45 having an upward outlet is integrally formed in the portion. Therefore, the steam 10 blown out from the steam discharge port 43 is discharged toward the upper part of the heating chamber 3 via the steam direction guide 45.
[0041]
FIG. 9 shows the mounted electric circuit.
The control unit 46 constituted by a microcomputer includes a cooking processing routine 47, a preheating / standby routine 48, a cartridge replacement timing notification routine 49, and the like.
[0042]
Until the cooking processing routine 47 for setting the object 2 to be placed on the placing plate 27 and cooking is started, the control unit 46 executes the preheating / standby routine 48 and the heating chamber 3 is preheated.
[0043]
[Preheating / Standby routine]
The preheating / standby routine 48 executed in the standby state is configured as shown in FIG.
[0044]
The control unit 46, which has determined that the standby state has been set, changes the mode from the A mode shown in FIG. 10 to the B mode as time elapses until any of the input keys 50 or the opening operation of the first door 13 is detected by the door switch 51. The mode is automatically switched from the B mode to the C mode.
[0045]
In the A mode, the inside temperature of the heating chamber 3 is controlled to “70 ± 10 ° C.” as follows. Specifically, a temperature sensor 52 is installed in the upper part of the heating chamber 3 as shown in FIGS. 3 and 4, and as shown in FIGS. The operation of the blower 20 is started.
[0046]
When microwaves are radiated into the refrigerator, the entire surface of the upper and lower heat storage plates 28a and 28b generates heat. Note that the support shelves 24a and 24b made of PPS (polyphenylene sulfide) also receive heat from the microwaves but generate heat at a lower temperature than the heat storage plates 28a and 28b.
[0047]
When the blower 20 is operated, a part of the warm air W that has cooled the magnetron 8 and warmed is formed in a hole 53 formed in the rear end face of the heating chamber 3 as shown in FIG. 6 (see FIG. 4). From the heating chamber 3. The released air Wa is sent to the front side of the heating chamber 3 between the upper surface 3b of the heating chamber 3 and the top plate 21 while being guided by a partition wall 21d formed on the top plate 21, and is sent to the front side of the top plate 21. From the front end, it flows into the space where the placing plate 27 is set from the right through the gap S between the front end of the heat storage plate 28a and the first door 13.
[0048]
The air in the space in which the mounting plate 27 is set is discharged as follows from a suction port 54 formed on the left side of the upper surface 3b of the heating chamber 3.
The suction port 54 communicates between the heat storage plate 28a and the top plate 21 via a duct 21e formed in the top plate 21, and the air Wb in the space where the mounting plate 27 is set is from the left. It flows between the heat storage plate 28a and the top plate 21 and is discharged from the suction port 21e.
[0049]
In this way, the air in the heating chamber 3 is stirred by the operation of the blower 20. The magnetron 8 is continued until the temperature detected by the temperature sensor 52 reaches 80 ° C. (A) of FIG. 10 represents the temperature inside the heating chamber 3. The operation of the blower 20 is continued for a while after the magnetron 8 is stopped for cooling the parts. Even when the magnetron 8 is stopped, the blower 20 is periodically operated to agitate the air in the heating chamber 3. When the temperature sensor 52 detects that the temperature detected by the temperature sensor 52 has dropped to 60 ° C., the control unit 46 turns the magnetron 8 on. During operation, the temperature inside the refrigerator is controlled to “70 ± 10 ° C”.
[0050]
FIG. 10C shows a period during which the exciting coil 32 is driven via the exciting coil driver 55. After the temperature detected by the temperature sensor 52 becomes close to 80 ° C. (80 ° C.−Δ), 80 ° C. The boiler 31 of the steam generating means 12 is preheated by driving the exciting coil 32 until the temperature reaches ° C.
[0051]
If the operation time of the A mode is in standby even after the specified time, the control unit 46 executes the B mode for the purpose of energy saving and changes the target temperature from “70 ± 10 ° C.” to “60 ± 10 ° C.” And control the temperature similarly.
[0052]
When the operation time in the B mode is in the standby state even when the specified time has elapsed, the control unit 46 executes the C mode for energy saving and ends the temperature control.
In any of the B mode and the C mode, when it is detected that any key of the input key group 50 is operated in a state where the first door 13 is closed, the mode is immediately returned to the A mode. It is configured to perform preheating.
[0053]
[Cooking processing routine]
In the cooking process routine 47, the operation pattern of the magnetron 8 and the operation pattern of the excitation coil driver 55 are selected based on the data input from the input key group 50, and the microwave 9 and the steam 10 are used together to be heated. Cook things properly.
[0054]
Specifically, one of the operation patterns shown in FIGS. 11 to 14 is selected and cooked.
In the operation pattern shown in FIG. 11, since the rising of the steam generation of the steam generation means 12 is as quick as about 10 seconds, the steam of the steam generation means 12 is supplied to the heating chamber 3 almost simultaneously with the start of the microwave operation, and almost all During the cooking time, heating and cooking are performed using both microwaves and steam, so that the moisture of the food to be heated can be suppressed from evaporating and a moist finished state can be realized.
[0055]
In this case, since the inside of the heating chamber 3 is warmed by executing the preheating / standby routine before the execution of the cooking processing routine, the steam 10 is supplied to the heating chamber 3 immediately after starting the cooking processing routine. However, no dew condensation occurs on the wall surface of the heating chamber 3.
[0056]
Since no dew condensation occurs, unnecessary radio wave absorption does not occur, and the distribution of microwaves in the storage of the heating chamber 3 does not become non-uniform due to the dew condensation, so that a good heating state can be obtained.
[0057]
Further, the steam 10 supplied to the heating chamber 3 is discharged upward of the heating chamber 3 via the steam direction guide 45 formed integrally with the support shelf 24a, so that the steam 10 does not directly hit the food. In addition, heating can be performed so that the temperature distribution in the refrigerator becomes uniform and wraps the whole food.
[0058]
It should be noted that dew condensation does not occur when steam 10 is supplied to the heating chamber 3 in the cooking process routine by executing the preheating / standby routine, which is the same in other operation patterns.
[0059]
The operation pattern shown in FIG. 12 is an operation pattern selected when heating and cooking frozen food. While the food is frozen, that is, while the food temperature is negative, the microwave is heated only, and from the time when the food is thawed and the food temperature has turned positive, the steam generating means 12 is operated and the microwave is heated. Cooking with steam. Evaporation of water from food starts when the food temperature turns positive, but by cooking while wrapping the food around with steam, this also suppresses the evaporation of water in the food and achieves a moist finish it can.
[0060]
In the operation pattern shown in FIG. 13, the steam of the steam generation means 12 is supplied to the heating chamber 3 almost simultaneously with the start of the microwave operation, and the steam generation means 12 ends earlier than the microwave. In this case, the amount of steam in the heating chamber 3 is reduced at the end of cooking, and the food is easily handled without contacting high-temperature steam when taking out the food.
[0061]
The operation pattern shown in FIG. 14 is another operation pattern selected when heating and cooking frozen food. While the food is frozen, it is heated and cooked with the high-power microwave and the low-power steam generated by the steam generating means 12, and the microwave is reduced to the medium power from the point where the food temperature has been turned to a positive value due to the thawing of the food. And the steam of the steam generating means 12 is raised to a medium output. Then, from the point in time when the temperature of the food has risen to a medium level, the microwave output is reduced and the steam of the steam generating means 12 is increased to a high output. In this case, it is possible to realize a moist finished state by making the whole food uniform and suppressing the evaporation of water in the food.
[0062]
[Cartridge replacement time notification routine]
The control unit 46 is configured to process the operation time of the pump 39 by the routine shown in FIG. 15 and to notify the time of replacement of the water treatment material. At the time of use, a set time A for the exchange notification and a set time B for prohibiting the operation of the steam generating means 12 (where B ≧ A) are set.
[0063]
At # 1, it is checked whether or not the set times A and B are to be initialized. If not, # 2 is executed. When the initial setting is made in # 1, # 2 is executed after the contents of the register are reset in # 3.
[0064]
In # 2, it is checked whether the pump 39 is operating. If it is determined in # 2 that the operation is being performed, the operation time of the pump 39 is counted in the register reset in # 3 in # 4, and # 5 is executed. If it is determined in # 2 that the vehicle is not driving, # 5 is executed without executing # 4.
[0065]
In step # 5, the contents (T) of the register that has counted the operation time in step # 4 are compared with the set time A of the exchange notification. The sign of the water treatment material replacement instruction is displayed, and # 7 is executed. If "T <A" is determined in # 5, then # 7 is executed.
[0066]
In # 7, it is checked whether or not the flag for the operation instruction of the steam generation means 12 is set. If it is determined that the flag for the operation instruction is not set, the operation of the pump 39 and the steam generation means 12 is determined in # 8. To stop. If it is determined in # 7 that the operation instruction flag has been set, the contents (T) of the register for counting the operation time in # 4 and the set time B are compared in # 9, and "T ≧ In the case of B ", the sign of prohibition of the operation of the steam generating means 12 is displayed on the display 56 of the operation panel in # 10, and # 8 is executed. If “T <B” is determined in # 9, then # 11 is executed to operate the pump 39 and the steam generating means 12.
[0067]
The set time A is keyed in from the input key group 50 at the time of installation according to the water quality of the place of use. Specifically, the water quality at the place of use is measured with a hardness reagent, and the hardness obtained by the measurement is keyed in from the input key group 50. More specifically, when the hardness reagent obtains a measurement result of any of hardnesses 50, 100, and 200, the mode is switched to the operation information key-in mode, and then the hardness obtained by the measurement is keyed in. Here, the control unit 46 enters the operation information key-in mode by keying in a specific code in a state where the specific key (for example, a cooking start switch) is kept pressed from the input key group 50 with the door 13 opened. Switch. When the measurement result is hardness 50, when “5” or “0” is keyed in, the control unit 46 sets a count value corresponding to the operation time of the pump 39 necessary for supplying 600 liters of water as the set time A. The routine of FIG. 15 is executed.
[0068]
When the hardness is 100, the control unit 46 executes the routine of FIG. 15 with the count value corresponding to the operation time of the pump 39 necessary for supplying 300 liters of water as the set time A.
[0069]
When the hardness is 200, the control unit 46 executes the routine of FIG. 15 with the count value corresponding to the operation time of the pump 39 necessary for supplying 150 liters of water as the set time A.
[0070]
[Security Routine]
As shown in FIG. 8, the main body 1 is provided with a detachable sensor 57 for detecting that the water supply tank 15 is correctly set, and a float sensor 59 for detecting a magnet float 58 incorporated in the water supply tank 15. ing.
[0071]
As shown in FIG. 16, when the control unit 46 detects that the power is turned on at # 12, the control unit 46 checks the detachable sensor 57 at # 13, checks the float sensor 59 at # 14, and then checks the input key group 50 in the input key group 50. It is checked at # 15 whether the start key has been operated.
[0072]
Therefore, only when the water supply tank 15 is correctly set in the main body 1 and the minimum amount of water is left, the steam generating means 12 detects the operation of the start key in # 15 and detects the steam in # 16. The generating means 12 is operated. If the water supply tank 15 is not correctly set in the main body 1 or if the water level is insufficient, the operation of the steam generating means 12 is stopped at # 17 to ensure safety.
[0073]
The water treatment material cartridge 40 is attached to the water supply tank 15 by pressing the water treatment material cartridge 40 from a lower position against a corresponding portion of the lid 15a of the water supply tank 15 so that the water treatment material cartridge 40 is rotated by a predetermined angle and locked. Therefore, the replacement work of the water treatment material cartridge 40 is easy. Further, since the connection point J between the lid 15a and the water treatment material cartridge 40 is formed so as to be higher than the upper limit water level of the water supply tank 15, the water treatment material cartridge 40 is mounted as shown in FIG. When the pump 39 is started, the water is not supplied to the steam generating means 12 even when the pump 39 is operated. This avoids clogging.
[0074]
If the user forgets to attach the water treatment material cartridge 40, even if the pump 39 is operated, water is not supplied to the metal body 33, and the temperature of the metal body 33 rises abnormally. In this embodiment, the control unit 46 is configured to monitor the temperature of the metal body 33 with the thermal switch 60, detect an abnormal temperature rise, and stop the operation of the excitation coil driver 55.
[0075]
If the water dropped on the metal body 33 does not completely evaporate, a pool of water is generated in the vicinity of the steam discharge port 43 of the steam generating means 12. In this embodiment, as shown in FIGS. 3 and 8, the level at the bottom of the steam discharge port 43 is set to a level lower than the level K of the steam blowout port 44 formed in the heating chamber 3. As described above, even if water is generated near the steam discharge port 43, the water does not flow into the inside of the heating chamber 3 from the steam blowout port 44.
[0076]
The pool of water generated near the steam discharge port 43 flows down from the drain port 43 a to the drain tank 62 via the trap 61. Further, the drainage generated in the heating chamber 3 is configured to be received by the gutter 63 and flow down to the drainage tank 62 as shown in FIGS. 4 and 8.
[0077]
In the above embodiment, the notification of the replacement time of the water treatment material cartridge 40 is determined based on the operation time of the pump 39, but may be determined based on the operation time of the steam generation unit 12 as shown in FIG. The same applies to the case where the determination is made based on the amount of water supplied by the pump 39 as shown in FIG. In FIG. 19, V is an integrated value of the amount of water supplied by the pump, Q is a set flow rate per unit time of the pump, and T is a sampling time interval.
[0078]
In the above embodiments, the boiler 31 and the pump 39 are stopped upon detecting that the water treatment material cartridge 40 has reached the replacement time. In the case of the embodiment shown in FIG. 40 is replaced with a new one, the contents of the same register reset in # 3 are reset, and the process returns to # 1. Then, the operation is continued for the first time. By detecting the approach and stopping the operation, detecting a restart input operation during the operation stop and permitting the operation only for a specified period, the user can use the new water treatment material cartridge. This microwave heating device can be used even during the period of preparing 40, and improvement in operating efficiency can be expected. The same applies to the case where the replacement time of the water treatment material cartridge 40 is determined based on the operation time of the boiler 31 or the pump water supply amount.
[0079]
In the above embodiment, two heat storage plates 24a and 24b are used. However, by providing the heat storage plate on at least one of the upper, lower, left, right, and rear end surfaces forming the heating chamber. This is effective for suppressing the occurrence of dew condensation when the steam 10 is supplied into the storage.
[0080]
【The invention's effect】
In the present invention According to this, the heating chamber is provided with a heat storage plate that generates heat and receives heat by being irradiated with microwaves from the microwave generation means. By supplying steam to the heating chamber while the heat storage plate is heated, dew condensation occurs. Can be reduced.
[0081]
And The steam generating means includes an exciting coil disposed outside the steam generating chamber, and a foamed or fibrous metal body disposed inside the steam generating chamber. With the configuration in which water is dropped, the occurrence of dew condensation can be reduced, and steam can be quickly supplied to the heating chamber, so that the time required for cooking can be reduced.
[0082]
Also, The heat storage plate is provided on at least one of the upper, lower, left, right, and rear end surfaces forming the heating chamber, or above or below the placement position of the object to be heated in the heating chamber. Since the heat storage plate is disposed at at least one of the positions, the heat storage plate can be efficiently heated by the microwave radiated into the refrigerator, and is effective in preventing dew condensation when steam is supplied.
[0083]
Also, Prior to the supply of steam to the heating chamber by the steam generation means, a control means for operating the microwave generation means to preheat the heat storage plate to a specified temperature is provided. Since it is heated to the temperature, it is possible to reliably suppress the occurrence of dew condensation when steam is supplied.
[0084]
Also, Since the air outlet that discharges steam from the lower position of the heating chamber upward to the heating chamber is provided, the steam supplied into the refrigerator is blown up inside the refrigerator, and the object to be heated is raised from above the refrigerator. The object to be heated moves downward in the set chamber, and the object to be heated can be cooked uniformly without the steam being directly applied to the object to be heated.
[0085]
Also, A support shelf that covers the side wall of the heating chamber and supports the end of the heat storage plate is provided, and the support shelf is provided with steam upward toward a position corresponding to a steam outlet formed below the side wall of the heating chamber. Since a steam direction guide for discharging is formed, the steam supplied into the refrigerator is blown up in the refrigerator, moves from the upper part of the refrigerator to the lower part of the refrigerator where the object to be heated is set, and is heated. The object to be heated can be cooked uniformly without the steam being directly applied to the object.
[0086]
Also, The length of the heat storage plate in the depth direction is set to be shorter than the length of the heating chamber in the depth direction, and a gap formed between the wall surface of the heating chamber and the heat storage plate set in the heating chamber is used for the microwave generation means. The oscillating tube is cooled so that warm air flows in, so it is possible to supply warm air into the chamber and stir the chamber into which steam is blown, without providing a special heating device for air. This is effective in suppressing the occurrence of dew condensation in the refrigerator and uniformly controlling the temperature in the refrigerator.
[0087]
Also, The boiler outlet of the steam generating means was connected to the steam outlet formed below the side wall of the heating chamber, and the lower level of the steam outlet was set higher than the lower level of the boiler outlet. It can stop the drained water from flowing into the storage.
[0088]
Also, The steam generating means is configured to receive the supply of water by sucking up the water in the water supply tank with a pump via a water treatment material cartridge attached to the water supply tank. Even if water containing the scale component is not supplied to the metal body with steam, clogging of the metal body due to erroneous operation can be prevented.
[0089]
Also, The control unit for determining the replacement time of the water treatment material cartridge based on the operation time of the pump for sucking water from the steam generating means or the water supply tank or the integrated value of the water supply amount and providing a control unit for notifying this is provided. It is possible to prevent the situation that the operation will be performed beyond the replacement time, and to encourage the user to replace the water treatment material cartridge before the water treatment material function deteriorates, and it will be stable for a long time. This can compensate for the operation.
[0090]
Also, Since the operation is stopped when it is detected that the time to replace the water treatment material cartridge is approaching, a control unit that detects the restart input operation during this operation stop and permits operation only for a specified period is provided. This microwave heating device can be used even during the period when the user prepares a new water treatment material cartridge, and improvement in operation efficiency can be expected.
[0091]
Also, Since a drainage tank is provided below the main body of the microwave heating device for receiving the dew condensation water in the heating chamber and the boiler drainage in the steam generation means, the drainage can be collected in the drainage tank, and the operability is good.
[0092]
Also, When a preheating start instruction is detected during standby, the microwave generating means is operated prior to the steam generating means, and the heating chamber is preheated to the first target temperature by the microwave generating means and the steam generating means. In the case where no operation is detected during the operation, the control means for switching the preheating target temperature to the second target temperature lower than the first target temperature and preheating the heating chamber is provided. Can be realized.
[0093]
Also, The heat storage plate is made by sintering the entire surface of the plate-shaped ceramic or porcelain with a glaze, so that heat generated by microwave irradiation is efficiently accumulated and the surface of the heat storage plate is preheated to a uniform temperature. This is effective in suppressing the occurrence of condensation when steam is supplied.
[Brief description of the drawings]
FIG. 1 is an external view of a microwave heating apparatus according to an embodiment.
FIG. 2 is a left side view of the microwave heating apparatus according to the embodiment.
FIG. 3 is a front sectional view of the embodiment.
FIG. 4 is a perspective view showing a state where accessories in the refrigerator of the heating chamber of the embodiment are removed.
FIG. 5 is an exploded perspective view of the internal accessory of the embodiment.
FIG. 6 is an assembled perspective view of the in-compartment accessory of the embodiment.
FIG. 7 is a sectional view of the heat storage plate of the embodiment.
FIG. 8 is a configuration diagram of a steam generating unit of the embodiment.
FIG. 9 is a configuration diagram of an electric circuit of the embodiment.
FIG. 10 is a time chart of a preheating / standby routine of the embodiment.
FIG. 11 is a time chart of a cooking process routine of the embodiment.
FIG. 12 is a time chart of a cooking process routine of the embodiment.
FIG. 13 is a time chart of a cooking process routine of the embodiment.
FIG. 14 is a time chart of a cooking process routine of the embodiment.
FIG. 15 is a flowchart of a cartridge replacement time notification routine according to the embodiment;
FIG. 16 is a flowchart of a security routine according to the embodiment.
FIG. 17 is an explanatory diagram when the user forgets to attach the water treatment material cartridge in the embodiment.
FIG. 18 is a flowchart of a cartridge replacement time notification routine according to another embodiment.
FIG. 19 is a flowchart of a cartridge replacement time notification routine according to another embodiment.
FIG. 20 is a configuration diagram of a conventional microwave heating device.
FIG. 21 is a time chart of the cooking process of the conventional example.
[Explanation of symbols]
2 Heated object
3 heating room
8 magnetron
9 Microwave
10 steam
11 Microwave generation means
12 Steam generation means
15 Water tank
20 blower
21 Top plate
24a, 24b Support shelf
27 Placement plate
28a, 28b heat storage plate
29 Mullite quartz porcelain
30 Glaze
31 Boiler
32 excitation coil
33 metal body
39 pump
40 Water treatment material cartridge
41 Unglazed chips
42 ceramic paper
45 Steam direction guide
46 Control unit
62 drainage tank

Claims (15)

A microwave heating device comprising: a microwave generation unit that irradiates a microwave to a heating chamber that accommodates an object to be heated; and a steam generation unit that supplies steam to the heating chamber, wherein the steam generation unit includes a steam generation chamber. Excitation coil arranged outside of, the foamed or fibrous metal body disposed inside the steam generation chamber, configured to drop water from the water supply tank to the upper end of the metal body, A microwave heating apparatus, wherein the heating chamber is provided with a heat storage plate that generates heat and receives heat when irradiated with microwaves from microwave generation means, and reduces dew condensation due to the steam in the heating chamber. A microwave heating device comprising: a microwave generation unit that irradiates a microwave to a heating chamber that accommodates an object to be heated; and a steam generation unit that supplies steam to the heating chamber. A heat storage plate for generating heat and storing heat by receiving microwave irradiation from the means, and operating the microwave generation means to preheat the heat storage plate to a specified temperature prior to the supply of steam to the heating chamber by the steam generation means; A microwave heating device provided with a control unit and configured to reduce condensation caused by the steam in the heating chamber . A microwave heating device comprising: a microwave generation unit that irradiates a microwave to a heating chamber that accommodates an object to be heated; and a steam generation unit that supplies steam to the heating chamber. A heat storage plate that generates heat and receives heat upon receiving the irradiation of microwaves from the means is provided, and the length of the heat storage plate in the depth direction is set shorter than the length of the heating chamber in the depth direction. A microwave heating device configured to cool the oscillating tube of the microwave generating means to flow in warm air from a gap formed between the heat storage plate and the heat storage plate, thereby reducing the condensation of the steam in the heating chamber. . A microwave heating device comprising: a microwave generation unit that irradiates a microwave to a heating chamber that accommodates an object to be heated; and a steam generation unit that supplies steam to the heating chamber. A heat storage plate is provided for generating heat and receiving heat when receiving microwave irradiation from the means, and when a preheating start instruction is detected during standby, the microwave generating means is operated prior to the steam generating means to operate with the microwave generating means. The heating chamber is preheated to a first target temperature by the steam generating means, and if no operation is detected within a specified time, the preheating target temperature is switched to a second target temperature lower than the first target temperature. A microwave heating device provided with control means for preheating the heating chamber by heating to reduce dew condensation due to the steam in the heating chamber . The microwave heating device according to any one of claims 1 to 4, wherein the heat storage plate is provided on at least one of upper, lower, left, right, and rear end surfaces forming the heating chamber . The microwave heating device according to any one of claims 1 to 4, wherein the heat storage plate is disposed at least one of an upper position and a lower position of the placement position of the object to be heated in the heating chamber. . The microwave heating device according to any one of claims 1 to 4, further comprising an outlet for discharging steam upward from a lower position of the heating chamber to the heating chamber . A support shelf that covers the side wall of the heating chamber and supports the end of the heat storage plate is provided, and the support shelf is provided with steam upward toward a position corresponding to a steam outlet formed below the side wall of the heating chamber. The microwave heating device according to any one of claims 1 to 4, wherein a steam direction guide for discharging is formed . 2. The micro-micrometer according to claim 1, wherein a boiler outlet of the steam generating means is connected to a steam outlet formed below the side wall of the heating chamber, and a lower level of the steam outlet is higher than a lower level of the boiler outlet. Wave heating device. Steam generating means, a microwave heating apparatus according to claim 1 which sucks up the water in the water supply tank by a pump through a water processing material cartridge attached to the water supply tank is configured to receive a supply of water. 11. The microcontroller according to claim 10, further comprising: a control unit that determines a replacement time of the water treatment material cartridge based on an operation time of the pump for sucking water from the steam generation means or the water supply tank or an integrated value of the water supply amount and notifies the user of the replacement time. Wave heating device. A control unit for stopping operation upon detecting that the time for replacement of the water treatment material cartridge is approaching, detecting a restart input operation during the operation stop, and permitting operation only for a prescribed period. The microwave heating device according to claim 10. The microwave heating device according to any one of claims 1 to 4, wherein a drainage tank that receives dew condensation water in the heating chamber and boiler drainage in the steam generation means is provided below the microwave heating device main body. The heat storage plate is constructed by applying a glaze to the entire surface of a plate-shaped ceramic or porcelain and firing the glass, and the portion of the glaze is heated by microwave irradiation, and the heat is stored in the ceramic or porcelain. Item 5. The microwave heating device according to any one of Items 1 to 4 . 13. The microwave heating apparatus according to claim 11, further comprising input means for inputting a set value of a replacement time .

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