TWI614458B - High frequency heating conditioner - Google Patents

Description

High frequency heating conditioner

The present invention is directed to a high frequency heating conditioner.

Japanese Patent Publication No. 2010-286183 (Patent Document 1) is known as a background art. In the summary column of Patent Document 1, it is described that "the beverage 27 is placed on the side close to the infrared sensor 24, which is not the center position, in accordance with the setting means 28 in accordance with the setting contents by the setting means 23. In this way, the infrared sensor 24 can be placed close to the lower side of the infrared sensor 24, and as a result, the infrared sensor 24 can directly receive the infrared light from the beverage 27, and can be accurately detected. The content of the beverage 27 itself."

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2010-286183

In Patent Document 1, although the position of the object to be heated can be specified, the heating control is performed on the relationship between the position at which the object to be heated is placed and the height of the object to be heated, and nothing is done. Record.

Accordingly, the present invention provides a high-frequency heating device capable of heating at a final temperature input by a user in response to the position and height of the object to be heated.

In order to solve the above problems, the present invention includes: a heating chamber; and a heating means for heating the object to be heated; and a table top, which is housed in the heating chamber and placed with the object to be heated; a weight sensor for supporting the aforementioned table top in a plurality of places and measuring the weight of the object to be heated; and an infrared sensor for detecting the temperature on the table top; and the control means based on the foregoing The detection value by at least one of the weight sensor and the infrared sensor is controlled by the heating means, and the control means is adapted to heat the object to be heated by the heating means Detecting, by the ratio of the respective detected values caused by the plurality of weight sensors, the position of the object to be heated on the table top, and in response to the detected position of the object to be heated, The selection is based on the detection value of the temperature of the aforementioned object to be heated by the infrared sensor described above or based on the weight of the aforementioned object to be heated by the aforementioned weight sensor. The detected value to control.

According to the present invention, there is provided a high-frequency heating device capable of heating at a final temperature input by a user in response to the position and height of the object to be heated.

23a‧‧‧Control means

24‧‧‧Table board

25‧‧‧ Weight sensor

28‧‧‧heating room

52‧‧‧Infrared sensor

60‧‧‧ container

60c‧‧‧heated objects

71‧‧‧ Input means

80‧‧‧heating chamber temperature sensor

330‧‧‧Microwave heating means (heating means)

W‧‧‧ weight

TH1‧‧‧heating chamber temperature

Tz‧‧‧ total heating time

Fig. 1 is a front perspective view of a heating conditioner according to an embodiment of the present invention.

Fig. 2 is a rear perspective view showing the outer casing of the heating conditioner according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1. FIG.

Fig. 4 is a cross-sectional view taken along line A-A of Fig. 1 and is an explanatory view of the operation of the infrared sensor when the wine is warmed by a cup.

Fig. 5 is a cross-sectional view taken along line A-A of Fig. 1 and is an explanatory view of the operation of the infrared sensor when a Japanese wine bottle is used to warm the wine.

Fig. 6 is an enlarged cross-sectional view showing an infrared sensor unit for explaining a reference position of an infrared sensor.

Fig. 7 is an enlarged cross-sectional view showing an infrared sensor portion for explaining an end position of an infrared sensor.

FIG. 8 is an enlarged cross-sectional view of the infrared sensor unit for explaining a state in which the observation window is closed.

[Fig. 9] is a wine of a heating conditioner for an embodiment of the present invention. The heating project is a flow chart for explanation.

Fig. 10 is an explanatory view for explaining the relationship between the amount of the container and the object to be heated.

Fig. 11 is an explanatory view for explaining the relationship between the amount of the container and the object to be heated.

Fig. 12 is a control block diagram of a heating conditioner according to an embodiment of the present invention.

Fig. 13 is a view for explaining a heating operation of the warm wine of the heating conditioner according to the embodiment of the present invention.

Fig. 14 is an explanatory view for explaining the position of the weight detecting means of the heating conditioner according to the embodiment of the present invention.

Hereinafter, embodiments of the invention will be described with reference to the drawings. 1 to 3 are diagrams showing the main part of the embodiment, and FIG. 1 is a perspective view of the body of the conditioner from the front side, and FIG. 2 is a frame outside the body. FIG. 3 is a perspective view of the AA of FIG. 1 taken from the rear side in a state where the state is removed.

In the figure, the body 1 of the heating conditioner is a container 60 for accommodating the food to be heated, and a container 60 for accommodating the object 60c, and is housed in the heating chamber 28, and uses heat of microwaves or heaters, Superheated steam to heat and condition the food.

Door 2 is intended to allow food to enter the interior of the heating chamber 28 When the door is opened and closed, the heating chamber 28 is closed in a closed state, and the leakage of the microwave used for heating the food is prevented, and the heat energy of the heater or the superheated steam is sealed. Heat is efficiently carried out.

The handle 9 is attached to the door 2 to facilitate opening and closing of the door 2, and has a shape that can be easily grasped by a hand.

The glass window 3 is attached to the door 2 in order to confirm the state of the food in the conditioning, and a glass which can withstand the high temperature caused by heat generation of a heater or the like is used.

The input means 71 is provided at the operation panel 4 on the lower side of the front surface of the door 2, and is provided by the heating means for performing microwave heating or heater heating, the time for heating, and the like, and the operation portion 6 for inputting the heating temperature. And the display unit 5 that displays the content input from the operation unit 6 and the progress of the conditioning is configured. The outer frame 7 is a cabinet that covers the upper surface and the left and right side surfaces of the body 1 of the heating conditioner.

The water tank 42 is a container in which water necessary for heating the water vapor is stored in advance, and is provided at the lower front side of the main body 1 of the heating conditioner, and is detachable from the front surface of the main body 1. The structure makes it easy to supply water and drain water.

The rear plate 10 is formed at the rear surface of the aforementioned chamber, and is provided with an external exhaust line 18 at the upper portion, and the vapor discharged from the food or the part for the inside of the body 1 is made. The cooling air (waste heat) 39 after cooling is discharged from the external exhaust port 8 of the external exhaust line 18.

The mechanical chamber 20 is disposed in a space between the bottom surface 28a of the heating chamber and the bottom plate 21 of the body 1. On the bottom plate 21, a magnetron 33 for heating food is mounted, and the magnetron 33 is used. The waveguide tube 47 to be connected, the control board 23 to which the control means 23a (refer to FIG. 12) is attached, various other components described later, and the fan unit 15 for cooling the various components are provided. The bottom surface 28a of the heating chamber is recessed in a concave shape, and a rotating antenna 26 is disposed therein. The microwave energy radiated by the magnetron 33 passes through the waveguide 47 and the output shaft 46a of the rotating antenna 26. The through hole portion 47a penetrates into the lower surface of the rotating antenna 26, and is diffused by the rotating antenna 26 and radiated into the heating chamber 28. The output shaft 46a of the rotating antenna 26 is coupled to the rotating antenna driving means 46.

The fan unit 15 is constituted by a cooling fan attached to a cooling motor, and the cooling motor is mounted on the bottom plate 21. The cooling air 39 generated by the fan unit 15 is a magnetron 33 and an inverter circuit (not shown) for generating heat in the machine room 20, a deep side weight sensor 25c, and a left side weight sensor 25b. The right weight sensor 25a (Fig. 14) is cooled.

Further, between the outer side of the heating chamber 28 and the outer frame 7, and between the conventional hot air box 11a and the rear plate 10, one side of the outer frame 7 and the rear plate 10 is cooled by the external exhaust line 18. The external exhaust port 8 is discharged. Further, a pipe 16a for cooling the hot air motor 13 to be described later and a pipe 16b for cooling the infrared ray unit 50 housed in the infrared ray box 48 to be described later are provided, and the infrared ray unit 50 is provided. The cooled cooling air 39 is discharged to the outside by the rear external exhaust line 18 discharged from the opposite side of the exhaust line 28e from which the exhaust heat (water vapor or the like) in the heating chamber 28 is discarded.

The microwave oven heating means (heating means) 330 (Fig. 12) includes a magnetron 33 and an inverter circuit (not shown), and is controlled by the control means 23a to heat the object 60c to be heated. The control means 23a controls the microwave oven heating means 330 based on the detection results of the weight sensor 25, the infrared sensor 52 and the heating chamber temperature sensor 80.

At the rear of the heating chamber 28, a hot air unit 11 is mounted.

The hot air fan 32 is rotated by the driving of the hot air motor 13 mounted on the outer side of the hot air box 11a, and the circulating air is heated by the hot air heater 14.

Further, the hot air unit 11 is provided with a hot air box 11a on the rear side of the deep wall surface 28b of the heating chamber, and a hot air fan 32 and a position on the outer peripheral side thereof are provided between the deep wall surface 28b of the heating chamber and the hot air box 11a. The hot air heater 14 is provided with a hot air motor 13 on the rear side of the hot air box 11a, and its motor shaft is coupled to the hot air fan 32 through a hole provided in the hot air box 11a.

The hot air motor 13 causes a temperature rise due to heat generated from the heating chamber 28 or the hot air heater 14. Therefore, in order to prevent this, the hot air motor cover 17 is surrounded by the hot air motor cover 17, and is formed as The slightly cylindrical pipe 16a is positioned between the hot bellows 11a and the rear plate 10, and The upper end opening of the duct 16a is connected to the lower surface of the hot air motor cover 17, and the lower end opening is connected to the air outlet of the fan unit 15, and a part of the cooling air 39 from the fan unit 15 is introduced. Inside the hot air motor cover 17.

On the inner side of the heating chamber top plate 28c of the heating chamber 28, a grid heating means 12 formed by a heater is attached. The grid heating means 12 is formed by winding a heating wire at the mica plate to form a flat shape, and is pressed and fixed to the inner side of the top plate of the heating chamber 28, and is heated by the top plate of the heating chamber 28 to radiate heat. To bake the food in the heating chamber 28.

Further, in the deep side of the heating chamber top plate 28c of the heating chamber 28, an infrared unit 50, which will be described later, is provided, and in order to cool the infrared ray unit 50, it is covered by the infrared ray box 48, and is formed to be slightly The tubular pipe 16b is positioned between the hot bellows 11a and the rear plate 10, and connects the opening of the upper end of the pipe 16b to the side of the infrared cover 48, and connects the opening of the lower end to the upper surface of the hot air motor cover 17. A part of the cooling air 39 from the fan unit 15 is introduced.

At the left side of the heating chamber top surface 28c of the heating chamber 28, a heating chamber temperature sensor 80 is provided which is provided with a heating chamber temperature TH1 for detecting the atmosphere of the heating chamber 28 by a thermistor.

Further, at the bottom surface 28a of the heating chamber, a plurality of weight sensors 25 are provided, for example, a left side weight sensor 25b, a right side weight sensor (not shown), and a rear side are provided on the left and right sides of the front side. Side center A deep side weight sensor 25c is provided, and a table top 24 is placed thereon. The weight sensor 25 measures the total weight W of the object to be heated 60c and the container 60.

The table top 24 is provided with a heat-receiving material 60c and a container 60 for placing foods and the like, and is heat-resistant and can be used in both the heater heating and the microwave heating. It is formed of a material having good microwave transmittance.

The boiler 43 is installed on the outer side surface of the hot air box 11a of the hot air unit 11, and the saturated water vapor is placed in the hot air unit 11, and the saturated water vapor discharged into the hot air unit 11 is heated by the hot air heater 14. Become superheated steam.

The heating means other than the microwave heating means 330 include a hot air heater 14, a hot air motor 13, a mesh heating means 12, a boiler 43, and the like.

Next, an infrared sensor provided in the depth of the upper portion of the heating chamber 28 and detecting the temperature of the object to be heated by non-contact will be described in detail with reference to Figs. 4 to 8 .

Fig. 4 is a view for explaining the operation of the infrared sensor in the case of warm wine in a cup using the sectional view shown in Fig. 3, and Fig. 5 is a section showing the use shown in Fig. 3. The figure shows the operation of the infrared sensor when the warm wine is used in the Japanese wine bottle, and FIG. 6 is an enlarged view for explaining the infrared sensor for displaying the reference position, FIG. It is an enlarged view of the description of the infrared sensor for displaying the end position, and Figure 8 is for the observation window. The closed state is shown in an enlarged view of the infrared sensor.

The component symbol 51 is a motor, and the direction of the motor 51 is attached so that the rotating shaft 51a and the heating chamber deep wall surface 28b are parallel. In the case where the cylindrical unit case 54 to be described later is rotated (driven) by the rotation shaft 51a, the substrate 53 on which the infrared sensor 52 is housed housed in the unit case 54 is rotated to cause infrared rays. The orientation of the lens portion 52a of the sensor 52 is rotationally movable in a range from the deep side of the heating chamber bottom surface 28a (the heating chamber deep wall surface 28b side) to the heating chamber opening portion 28d, so that it can be detected. temperature. The motor 51 is a stepping motor, and the rotation shaft 51a can be rotated forward, reversed, or rotated at a desired angle by the control means 23a provided on the control board 23.

The component symbol 52 is an infrared sensor and is provided with a plurality of infrared detecting elements (for example, a thermistor) and detects the temperature of the object to be heated in a non-contact manner, and is used in the rotating shaft 51a. An infrared sensor that aligns eight components into one column in the vertical direction. Therefore, in the left-right direction of the heating chamber bottom surface 28a, the temperature of the plurality of places can be detected at one time, from the deep side of the heating chamber 28 (the heating chamber deep wall surface 28b side) to the front side (the door 2 side). In the range, the temperature of the entire area of the bottom surface 28a of the heating chamber can be detected by rotating the infrared sensor 52. Specifically, the overall temperature of the table top 24 placed at the bottom surface 28a of the heating chamber is detected.

The component symbol 54 is a cylindrical unit case, and the substrate 53 is disposed at the largest diameter portion, and a lens for the infrared sensor 52 is disposed. The portion 52a serves as a facing window portion 54a. Further, by including carbon in the material of the unit case 54, the characteristics of the unit case 54 are made of a conductive material, thereby preventing invasion of foreign noise into the cell case 54.

The component symbol 55 is a gate formed of a metal plate. The shutter 55 is a person who closes the observation window 44a to be described later when the infrared sensor 52 is not used (refer to FIG. 8). Further, in order to prevent the temperature of the heating chamber 28 from being transmitted to the unit case 54, the cooling air is caused to flow around the outer circumference of the unit case 54, so that a wind having a gap along the outer circumference of the unit case 54 is formed. The gate 55 is disposed in a manner of a path 55c, and an opening 55a and an opening 55b which serve as an inflow outlet of the cooling air 39 are provided at the air passage 55c.

The component symbol 56 is a positioning convex portion, and the control portion is rotated with respect to the motor 51 in such a manner that the detection point of the infrared sensor 52 is located at the reference position (detection point a of FIG. 4). When the control is capable of correcting the reference position of the detection point of the infrared sensor 52, when the observation window 44a is closed by the shutter 55, by positioning the convex portion 56 and being disposed in the infrared When the stoppers (not shown) in the case 48 are in contact with each other, the rotation shaft 51a is slid, and the reference position controlled by the control unit and the reference for detecting the infrared sensor 52 can be used. The position of the detection point a of the position is corrected.

The component symbol 44 is an arc-shaped observation portion that protrudes toward the inner side of the heating chamber 28, the rotation center of the rotation shaft 51a, the center of the cylindrical unit case 54, and the outer circumference of the unit case 54. The center of the arc of the gate 55 that is set and bent into an arc shape, and the arc The center positions of the observation portions 44 are all at the same position. The component symbol 44a is an observation window provided at the observation unit 44, and opens a range of the visual field range in which the infrared sensor 52 detects. Further, in order to prevent leakage of microwaves from the observation window 44a during microwave heating, a burring 44b is provided around the observation window 44a to a depth of about 2 mm.

By projecting the observation unit 44 toward the inside of the heating chamber 28, it is possible to perform a wide range of temperature detection with a minimum narrow observation window opening range.

The component symbol 49 is a convex portion, and the infrared box 48 and the infrared ray unit 50 are separated from the heating chamber top plate 28c, and are configured such that only the convex portion 49 is in contact with the heating chamber top plate 28c. The temperature of the heating chamber top plate 28c heated by the heater such as the grid heating means 12 or the hot air unit 11 is hardly conducted to the infrared unit 50 at the time of heating.

The measurement method of the infrared sensor 52 of the control means 23a mounted on the control board 23 will be described with reference to Figs. 4 and 5 .

Fig. 4 is a view for explaining the action of the infrared sensor when the wine is put into the cup and warm wine is used, and Fig. 5 is for charging the wine into a Japanese wine bottle and performing warm wine. In the case of the situation, the action of the infrared sensor is illustrated. In Fig. 4, the liquid level 60c1 of the object 60c can be directly grasped at the detection point f. This is because the mouth of the container 60 which is a cup is wide. In Figure 5, the system is not directly graspable. It is to the liquid surface 60c1 of the object 60c to be heated, because the mouth of the container 60 which is a Japanese wine bottle is narrow.

The infrared sensor 52 is a sensor that can measure eight points by one measurement, and is driven by the motor 51 from the reference position (FIG. 4, detection point a) to the end position (FIG. 4). At the detection point h), the infrared sensor 52 is rotated by 14 times of 3 times, and a total of 15 columns are measured, and 120 places in the left-right direction 8 points × 15 directions in the front-rear direction are detected. The temperature. Thereafter, from the end position to the reference position, the infrared sensor 52 directly returns to the reference position without performing measurement.

In the temperature detection, the infrared sensor 52 is rotated 14 times in three steps from the reference position to the end position, and the measurement is performed in 15 columns, and then the end position is obtained. The action of returning to the reference position.

Comparing the temperature of the object 60c detected by the infrared sensor 52 with a specific temperature H (for example, 30 ° C) memorized in the control means 23a, and the detected temperature reaches a specific temperature The arrival time of the determination temperature H (the elapsed time from the start of heating) is stored as the initial heating time T1. The control of the control means 23a will be described later.

Next, the rotational movement of the infrared sensor 52 will be described.

In the case of the container 60 which is opened above the object to be heated (wine) 60c, the cup is placed in the heating chamber. When the heating is started on the table top 24 at the bottom surface 28a, the observation window 44a is closed by the shutter 55 for 1 to 2 seconds during which the magnetron 33 performs the stable communication (refer to FIG. 8) to prevent the cause of The noise caused by the unstable transmission at the start of the transmission of the magnetron 33 enters the infrared sensor 52.

After the transmission of the magnetron 33 is stabilized, the control means 23a is controlled such that the rotation shaft 51a of the motor 51 is rotated to the reference position. By rotating the rotation shaft 51a to the reference position, the unit case 54 is rotated, and the orientation of the lens portion 52a of the infrared sensor 52 is also rotated to a position where the detection point a of the reference position can be detected (refer to Figure 4, Figure 6). At this time, since the cooling air 39 flows through the lens portion 52a of the infrared sensor 52 and flows from the sensor window portion 44a toward the heating chamber 28, adhesion to the lens portion 52a is prevented.

By rotating the unit case 54, the temperature of the object to be heated 60c is detected from the aforementioned reference position (detection point a) toward the detection point b and the detection point c of the table board 24, if it is a unit box Further rotation of 54 detects the temperature outside the cup (container 60) in the height direction, and detects the temperature from the detection point d to the detection point e. After the detection point reaches the apex of the opening of the cup (container 60), the temperature of the surface of the object 60c is detected at the detection point f, and then the cup is detected at the detection point g. The temperature inside the container (container 60) is then detected at the detection point h to detect the temperature of the table top 24.

The detection of the temperature of the temperature detection range of the detection point a to the detection point h is performed in a single pass of the outward movement of the unit box 54. After the temperature detection is performed until the end point, in the return journey, the measurement is not performed on the way without detecting the temperature, and after returning to the reference position again, the detection point a~ is detected again. The measurement point h is performed in sequence.

The number of detected temperatures can be changed according to the requirements. The above detection points a to detection points h are examples for description, and 15 columns of data are measured as described above.

Moreover, the detection of the temperature stops the rotation of the motor 51 and detects it during the ongoing temperature detection, and then performs the rotation after the detection. In order to accurately detect the temperature, it is desirable to stop the rotation and perform the measurement.

For example, at the initial stage of heating, the rotation of the unit box 54 is stopped and detected. After the detection is performed, the rotation is performed at a certain angle, and the rotation is stopped to detect, after the detection is performed. The rotation is performed at a certain angle, and these actions are repeated, and the temperature distribution is measured in the form of a mesh. With such a configuration, the infrared sensor 52 that divides the upper surface of the table plate 24 into a plurality of places and detects the temperature by measuring the temperature at a certain position at an equal angle is set in From the four sides of the table top 24 placed at the bottom surface 28a of the heating chamber, the heating chamber top plate 28c on the inner side of the imaginary line extending perpendicularly to the heating chamber top plate 28c is slightly centered in the left-right direction.

Moreover, the field of view of the infrared sensor 52, the detection point a and the detection point h are roughly determined as the range for detecting the temperature of the flange portion before and after the table board 24, in the infrared sensor 52 Made in the horizontal direction The sensors of the plurality of elements of the column are roughly defined as covering the left and right sides of the table 24 and detecting the temperature. Thereby, it is possible to accurately detect the temperature of the object to be heated placed at the center of the table top 24. Further, in order to detect the temperature of the object 60c to be charged in the cup 60, the rotation of the infrared sensor 52 is preferably a rotation in which the temperature measurement range is wide.

With this setting, when the cup 60 is placed at the center of the deep side of the table top 24, it is possible to detect the inside of the cup by the detection point b on the lower side of the infrared sensor 50. The temperature of the object 60c to be heated.

Further, when the weight information obtained by the weight sensor 25 and the temperature distribution information detected by the infrared sensor 52 are used, it is known that the weight information is light and the temperature distribution is recognized in a wide range. When the temperature rises, it can be judged that the object to be heated 60c is thin and wide. Further, when it is known that the weight information is heavy and the temperature rise of the temperature distribution is recognized only in the narrow range, for example, it can be judged that the object 60c is loaded into the cup (container 60) having a high height. .

In the present embodiment, the infrared unit 50 is provided at the heating chamber top plate 28c. However, the mounting position of the infrared unit 50 is the same as that before the heating chamber top plate 28c. The same idea as described above is provided, and the temperature of the object 60c to be heated can be accurately detected.

In the present embodiment, although the method of detecting the temperature of the object 60c to be heated in the cup 60 is described in detail, even if the object 60c to be heated is not used, the block is formed. Large block In the case of the object, since the height direction of the side surface of the block-shaped object to be heated 60c and the temperature of the upper surface can be detected, the temperature distribution of the object 60c to be heated can be detected in detail.

Next, a method of controlling the automatic conditioning of the object 60c to be heated using both the infrared sensor 52 and the weight sensor 25 will be described with reference to Figs. 9 to 13 . The case where the object to be heated 60c is a wine and the container 60 is a cup is taken as an example.

As shown in FIG. 12, at the control means 23a, an input is made from the input means 71, the infrared sensor 52, the weight sensor 25, and the heating chamber temperature sensor 80, by means of the control means 23a. The microwave oven heating means 330 is controlled.

Next, the heating process will be described in detail using the flowchart of FIG.

Warm wines are mainly two types of containers 60 that use cups and Japanese sake bottles. Also, the amount of wine to be loaded will vary. In the face of the heating conditions of these, the heating is performed while being judged.

First, in the heating chamber 28, the container 60 in which the wine as the object to be heated 60c is placed is placed on the table top 24, and the door 3 is closed. By input means 71, one of heating, warming, and skin temperature is selected from the warm wine menu (Engineering S0). The final temperature of each menu was 50 ° C for heating, 40 ° C for heating, and 35 ° C for skin temperature. By input means 71, one of strong, medium, and weak is selected from the final adjustment (engine S1). The final adjustment of the "medium" is based on the standard temperature for final processing, "strong", the final temperature is set to be The standard is higher by about 5 ° C. "Weak" means that the final temperature is set to be lower by about 5 ° C than the standard. If the start of heating is input (Project S2), it is set to the heating output P set in advance.

Next, the total weight W of the object to be heated 60c and the container 60 placed on the table top 24 is detected by the weight sensor 25 (engineer S3). When the detected weight W is equal to or less than the specific value W0, it is determined by a small amount of mode determination (engineer S4) that the load mode is small. When the detected weight W is equal to or less than the specific value W0, the heating of the object 60c is performed by a small amount of load mode (Project S5).

The small amount of load mode (engineering S5) is based on the detected weight W, and the total heating time Tz is calculated based on the result of confirming the heating time to the extent that the wine can be heated to the input temperature. And heating works. The transfer of at least the load mode is based on the weight of the 1/4 level wine in the cup.

When the confirmation of the small-scale mode determination project (the project S4) is completed, the temperature TH1 of the heating chamber is detected by the heating chamber temperature sensor 80 (S60), and is determined in the high temperature of the heating chamber (S61). When the temperature TH1 of the heating chamber is higher than the specific temperature (in the case of N), the temperature is shifted to the high temperature mode and the heating of the object 60c is performed in the high temperature mode (S62).

In the high temperature mode (S62), it is impossible to use infrared rays when the temperature of the heating chamber 28 after conditioning in the microwave oven is high. The sensor 52 detects the temperature of the object 60c correctly, and therefore, in order to avoid such a situation. In the high temperature mode (S62), based on the detected weight W, the total heating time Tz is calculated based on the result of confirming the heating time to the extent that the wine can be heated to the input temperature. Heating project.

Next, the position of the food is detected by the weight sensor 25 (S63). This process is performed in order to detect where the object to be heated 60c is placed at the table plate 24 and to perform heating control in response to the detected position.

The range in which the infrared sensor 52 can perform temperature detection is such that when the container 60 in which the object 60 to be heated is placed in a container 60 having a low height such as a cup or a tray, regardless of the container 60 The temperature of the object to be heated 60c can be detected at any position placed on the table top 24. Therefore, if the object to be heated 60c is placed in the container 60 such as a cup and placed on the table top 24, the area of the surface of the object 60c to be heated is narrower than the cup or the plate. The position is higher. Therefore, when the cup in which the object to be heated 60c is placed is placed, if the placement position is toward the end side of the table top 24, the temperature of the surface of the object 60c cannot be detected. Case. Therefore, it is necessary to detect the position at which the object to be heated 60c is placed and to perform heating control in accordance with the position to be placed.

Further, when the heating chamber 28 is long in the left-right direction and the microwave irradiation position is provided at the center of the heating chamber bottom surface 28a, the position of the object to be heated 60c is increased toward the left and right end portions. The lower the thermal efficiency, it is therefore necessary to control the heating efficiency during heating in response to the position to be placed.

In response to the above, a method of detecting the position of the object to be heated using the weight sensor 25 will be described in detail. Regarding the arrangement position of the plurality of weight sensors 25, as in the foregoing, the left side weight sensor 25a is present on the left side of the front side of the heating chamber bottom surface 28a, and the right side weight sensor 25b is present on the right side. And there is a deep side weight sensor 25c at the center of the deep side. A table weight 24 of a particular weight is supported by the three weight sensors 25. In this state, since the weight of the table top 24 has been applied at the weight sensor 25, at the control means 23a, the weight of the table board 24 is first subtracted, and then The weight of the object to be heated 60c and the weight of the container 60 placed on the table top 24 is controlled.

In the identification of the weight of each weight sensor 25 when the object to be heated 60c is placed in the center of the table top 24, the left side weight sensor 25a is 1 in proportion, and the right side weight sensor 25b is In the case of 1, the deep side weight sensor 25c is 2, and the weight of the object to be heated 60c and the container 60 is 4, which is the total of the detected values of the respective weight sensors 25. Regardless of the position at which the object to be heated 60c is placed on the table top 24, the total of the detected values of the weight sensor 25 can accurately detect the weight of the object 60c and the capacity 60.

For example, when the position of the object to be heated 60c placed on the table top 24 is gradually moved toward the right end from the center, the change in the detected value of the weight sensor 25 is a feeling of weight on the left side. Detector The detected value of 25a becomes smaller and the detected value of the right weight sensor 25b becomes larger. At this time, when there is no change in the position after the heating chamber (the depth direction), the total of the detected values of the left weight sensor 25a and the detected value of the right weight sensor 25b are constantly displayed. There is the same value (the range of the difference), and the value of the deep side weight sensor 25c is constant and exhibits the same value (the range of the difference).

Further, if the position of the object to be heated is positioned in the center in the left-right direction and moved in the front-rear direction from the center toward the deep side, the detected value of the left weight sensor 25a and the detection of the right weight sensor 25b are detected. The ratio of the values is constant to exhibit the same value (the range of the difference), and as the movement, the total value of the detected value of the left weight sensor 25a and the detected value of the right weight sensor 25b becomes smaller. Conversely, the detected value of the deep side weight sensor 25c becomes large.

Further, depending on the weight of the object to be heated 60c and the placement position, the detected value of the weight sensor 25 may exhibit a negative value. This means that when the object to be heated 60c is placed on the end of the table top 24, the table top 24 on the side opposite to the end on which the object is placed is as if it is lifted.

For example, if the object to be heated 60c is placed deep in the right side, the right weight sensor 25b and the deep side weight sensor 25c are fulcrums, and the left side of the table top 24 is lifted. Therefore, the detected value of the left weight sensor 25a becomes light, and if the object to be heated is placed deep in the left side, the detected value of the right weight sensor 25b becomes light. In view of this, the sense of weight is obtained by the state in which the table top 24 of a specific weight is placed. The detected value of the detector 25 is used as the zero point to cause the control means 23a to subtract the weight first, and it is also possible to detect the negative weight even if the object to be heated 60c is placed on the left side weight sensor 25a and When the right weight sensor 25b and the deep side weight sensor 25c are connected to each other and are further outside, the weight of the object 60c and the container 60 can be accurately detected.

The arrangement of the three places of the weight sensor 25 may be a total of three places where one place is placed in the center of the front side and one place is placed on the left side of the deep side.

As described above, the weight of the object to be heated 60c and the container 60 is detected by the weight sensor 25, and the position of the object to be heated 60c is detected in accordance with the ratio of the detected weight values. When it is determined that the detected position of the object to be heated 60c is within the temperature detection range of the infrared sensor 52, the process proceeds to the next step S6. When it is judged that the aforementioned detection result is outside the temperature detection range of the infrared sensor 52, it proceeds to the blind angle mode of the project S65.

The blind spot mode (S65) is based on the fact that the wine can be heated to the input temperature based on the detected weight W of the object to be heated 60c and the container 60 set in the high temperature mode (S62) described above. The degree of heating time was confirmed as a result, and the total heating time Tz was calculated and the heating was performed.

In addition, since the dead angle mode is heated in a state where the object to be heated 60c is placed on the end side of the table top 24, the heating efficiency is poor, and the heating efficiency is caused by the heating efficiency. Correct By correcting and heating the total heating time Tz, the final temperature can be made constant regardless of the place where the object 60c is placed.

Further, when the heating efficiency is extremely deteriorated due to the placement place, in consideration of the problem of energy saving, it is also possible to use a notification means to prompt the user to pay more attention, and not to move to the heating place. The heating is stopped.

Further, it is configured such that a small amount of mode determination (engineer S4) is determined in preference to the high temperature determination (S61) of the heating chamber, and the high temperature determination (S61) of the heating chamber is performed in preference to the dead angle determination of the placement position (S64). It is determined that even when it is difficult to detect the temperature of the object 60c by the infrared sensor 52, the total heating time Tz is calculated by the detection result of the weight sensor 25.

In other words, when the total weight W is equal to or less than a specific value before the total heating time Tz is determined by the detection result of the infrared sensor 52, the control means 23a preferentially shifts at least the load mode when heating. When the chamber temperature TH1 is higher than the specific temperature, the difference is preferentially shifted to the high temperature mode, and the difference between the detection results of the weight sensors 25 on the left side of the current side is a specific value calculated based on the total weight W and the coefficient. In the larger case, the mode is preferentially shifted to the dead angle mode, and the total heating time Tz is determined by the detection result of the weight sensor 25.

Next, with reference to Fig. 9, a microwave oven heating 1 (detection heating) for judging the container 60 (cup and Japanese sake bottle) being used will be described.

If the microwave oven starts heating (Engineering S6), then the system is followed. The initial temperature Ts1 of the object 60c to be heated is detected (engineer S7). The items S8 to S10 are the items for measuring the elapsed time ta until the temperature Ts3 of the object to be heated 60c is raised to the specific temperature Ts2. When the infrared sensor 52 determines that the temperature of the object to be heated 60c is the same as the specific temperature Ts2, the process proceeds to the next step S11.

In the step S11, the rising temperature after the initial temperature Ts1 is subtracted from the specific temperature Ts2 and the elapsed time ta from the start of heating to the specific temperature Ts2 are extracted, and the temperature increase rate Tv1 is calculated.

In the item S12, the calculated temperature increase rate Tv1 is confirmed, and when it is slower than the specific temperature increase rate Tv0, the process proceeds to the Japanese bottle mode of the engineering S14, and the system is faster. At the time, the system moves to the cup mode of the project S13.

If a Japanese wine bottle is used to warm the wine, since the height of the Japanese wine bottle is high and the mouth of the bottle is narrow, the infrared sensor 52 cannot detect the temperature of the liquid surface. Therefore, the infrared sensor 52 is a temperature at which only the surface of the Japanese wine bottle is detected. The temperature of the surface of the Japanese sake bottle is caused by the increase in the temperature of the wine due to the increase in the temperature of the wine. Therefore, the temperature increase rate Tv1 is slow.

The heating up to this point is 1 in the microwave oven, and then the microwave oven 2 (additional heating) after the determination of the container 60 being used is performed.

According to the embodiment described above, there is provided: a heating chamber; and a heating means for heating the object to be heated; and a table top, Storing in the heating chamber and placing the object to be heated; and a plurality of weight sensors supporting the table top in a plurality of places and measuring the weight of the object to be heated; and an infrared sensor for detecting And a control means for controlling the heating means based on a detection value caused by at least one of the weight sensor and the infrared sensor, the control means, When the object to be heated is heated by the heating means, the object to be heated on the table top is detected in accordance with the ratio of the respective detected values by the plurality of weight sensors. Positioning, and depending on the position of the object to be heated detected, is selected based on the detected value of the temperature of the object to be heated caused by the infrared sensor, or based on the aforementioned sense of weight The detected value of the weight of the aforementioned object to be heated by the detector is controlled. Thereby, even if the container is placed at the end of the heating chamber, heating suitable for the object to be heated can be achieved.

Claims (1)

A high-frequency heating conditioner characterized by comprising: a heating chamber; and a heating means for heating the object to be heated; and a table plate, which is housed in the heating chamber and loaded with the object to be heated And a plurality of weight sensors supporting the table top plate at a plurality of places and measuring the weight of the object to be heated; and an infrared sensor for detecting the temperature of the table top plate; and controlling means Controlling the heating means based on a detection value caused by at least one of the weight sensor and the infrared sensor, wherein the heating means is heated by the heating means Detecting, according to the ratio of the respective detected values caused by the plurality of weight sensors, the position of the object to be heated on the table top, according to the detected object to be heated The position is selected based on the detection value of the temperature of the object to be heated caused by the infrared sensor described above or based on the weight of the aforementioned object to be heated by the aforementioned weight sensor The detected value to control.