JP2008004409A - Food heating device, and vending machine equipped with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a food heating device capable of improving heating efficiency of a food, and to provide a vending machine equipped with the same. <P>SOLUTION: The food heating device 10 is provided with a storage cylinder 16c in which a PET bottle drink X is stored from the outside and a heater 16a which emits generated microwave from an antenna 16a1, and heats the PET bottle drink X stored in the storage cylinder 16c by microwave. An adjusting means is provided which makes the position where the electric field intensity by microwave becomes maximum coincide with the position of the food stored in the storage part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a food heating apparatus for heating food contained in a container such as a plastic bottle beverage by microwaves and a vending machine provided with the same.

  In general, when heating foods in containers such as cans and plastic bottles, these foods can be stored in a showcase and heated, or stored and heated in a vending machine. Like to sell.

  However, such showcases and vending machines are not always effective heating means in terms of energy efficiency because foods stored or stored are always heated and stored. In addition, long-time high-temperature heat storage causes deterioration of food quality, and there is a problem in that food is discarded at an early stage or the expiry date is shortened.

In response to such problems, in a vending machine equipped with a food heating device using microwaves as a heating means, food carried out from a storage section provided at the upper part of the vending machine body rolls on a gently inclined portion. While being conveyed to the take-out part provided in the lower part of the vending machine main body, what is heated to a predetermined temperature by a microwave is known (for example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 10-275273

  However, the conventional food heating apparatus has a problem that the heating efficiency is poor because the food container is heated uniformly so that the microwave is stirred so as to spread over the entire heating space.

  This invention is made | formed in view of the said problem, The place made into the objective is to provide the food heating apparatus which can improve the heating efficiency with respect to a foodstuff, and a vending machine provided with the same.

  In order to achieve the above-mentioned object, the present invention includes a storage unit in which food in a container is stored from the outside, and a magnetron that emits the generated microwave from the antenna, and the food stored in the storage unit is microwaved. In the food heating apparatus heated by the above, a food heating apparatus provided with an adjusting means for matching the position where the electric field intensity by the microwave becomes maximum and the position of the food stored in the storage unit is proposed.

  According to this food heating apparatus, the position at which the electric field intensity due to microwaves becomes maximum coincides with the position of the food stored in the storage unit, so that the heating efficiency by microwaves can be maximized for food. .

  In order to achieve the above object, the present invention proposes a vending machine equipped with the food heating device in a vending machine that sells food in a container.

  According to this vending machine, since the position where the electric field intensity due to the microwave is maximized coincides with the position of the food stored in the storage unit, the heating efficiency by microwave can be maximized for the food. .

  According to the food heating device and the vending machine according to the present invention, the heating efficiency by microwaves can be maximized for food, so that the power consumption accompanying heating can be reduced. While being able to achieve miniaturization and simplification, the heating time can be shortened, and the service to the user can be improved.

  1 to 8 show a first embodiment of the present invention. FIG. 1 is a front view of a food heating apparatus, FIG. 2 is a schematic sectional side view of the food heating apparatus shown in FIG. 1, and FIG. 4 is an enlarged side view of the heating unit shown in FIG. 4, FIG. 4 is a cross-sectional view illustrating a state in which the plastic bottle beverage is stored in the heating unit illustrated in FIG. 3, and FIG. 5 is an enlarged top view illustrating the operation of the stub illustrated in FIG. 6 is a block diagram showing a control system configuration of the food heating apparatus shown in FIG. 1, FIG. 7 is a flowchart showing a heating operation of the food heating apparatus shown in FIG. 1, and FIG. 8 is a wave guide shown in FIG. It is a wave form diagram explaining the stationary wave of the microwave in a pipe | tube. In addition, in the following description, it demonstrates using the plastic bottle drink X as a foodstuff in a container except the case where it specifies clearly.

  As shown in FIG. 1, a display device 11, a speaker 12, a food inlet 13, and a food outlet 14 are provided on the front surface of the food heating device 10 from the upper part to the lower part.

  The display device 11 is for displaying characters, graphics, symbols, still images, moving images, and the like, and is composed of, for example, a liquid crystal display. As long as the same display is possible, a known CRT display, plasma display, organic EL display, or the like may be used.

  The speakers 12 are for outputting sound, signal sound, and the like, and are disposed on both lower sides of the display device 11. Two or more speakers 12 are preferably provided in order to obtain a three-dimensional sound effect by a stereo method or the like, but may be one. Moreover, it is not limited to the case where both the display device 11 and the speaker 12 are provided, and either one may be provided.

  The food input port 13 is used to input food to be heated by the food heating device 10 from the outside, and is disposed at the lower center of the speaker 12. Moreover, the food inlet 13 is formed in the circular shape which has a diameter a little larger than the outer diameter of the PET bottle drink X among the input food. Thereby, the plastic bottle drink X is thrown in to a longitudinal direction.

  The food outlet 14 is for taking out the heated food, and is disposed below the food inlet 13. In addition, the food outlet 14 is provided with an open / close door 14a that can be opened manually.

  As shown in FIG. 2, inside the food heating apparatus 10, a transport unit 15, a heating unit 16, a carry-out unit 17, and a power source 18 are provided.

  The transport unit 15 is for transporting food input from the food input port 13 to the heating unit 16, and communicates between the food input port 13 and the heating unit 16.

  The carry-out unit 17 is for carrying out the food heated by the heating unit 16 to the food take-out port 14, and communicates between the heating unit 16 and the food take-out port 14.

  The power source 18 is for supplying electric power to the whole food heating apparatus 10, and a general household power source is used in this embodiment.

  As shown in FIGS. 3 and 4, the heating unit 16 is a known microwave heating apparatus including a heater 16 a and an applicator.

  The heater 16a is a well-known magnetron, and generates a microwave by the electric power supplied from the power source 18 and emits it from the antenna 16a1.

  The applicator includes a waveguide 16b, a storage cylinder 16c (microwave irradiation chamber) as a storage unit, an upper lid 16d, and a lower lid 16e.

  The waveguide 16b opens a part of the upper plate surface 16f and is connected to the storage cylinder 16c, and propagates the microwave emitted from the heater 16a in the direction of the storage cylinder 16c.

  The storage cylinder 16c has a cylindrical shape with an upper surface and a lower surface opened. The upper surface opening is connected to the transport unit 15 and the lower surface opening is connected to the waveguide 16b. Further, an upper lid 16d is provided at the top opening of the storage cylinder 16c so as to be freely opened and closed. By opening and closing the top lid 16d, the transported plastic bottle drink X is carried from the top opening, and from the storage cylinder 16c. The microwave is prevented from leaking. In the present embodiment, the storage cylinder 16c has a cylindrical shape, but is not limited to this, and may have a shape other than a cylinder, for example, an ellipse or a polygon.

  The lower lid 16e is provided so that a part of the lower plate surface 16h of the waveguide 16b can be opened and closed. By opening and closing the lower lid 16e, the plastic bottle drink X is carried out to the carry-out portion 17 and is carried in. The plastic bottle beverage X is supported and stored in the storage cylinder 16c, and microwaves are prevented from leaking from the storage cylinder 16c.

  The hole 16j is provided by opening a part of the upper plate surface 16f of the waveguide 16b, and the antenna 16a1 of the heater 16a (magnetron) is inserted therein.

  The stub 16g is made of a nonmagnetic metal such as aluminum, and is attached to the inside of the upper plate surface 16f, that is, in the waveguide 16b. As shown in FIG. 5, the stub 16g is coupled to a motor 19a via an arm 19b, and is moved in the longitudinal direction of the waveguide 16b as the motor 19a rotates. Here, in the microwave circuit using the antenna 16a1 as a microwave source and the plastic bottle beverage X stored in the storage cylinder 16c as a load, the stub 16g is moved in the longitudinal direction of the waveguide 16b, thereby Impedance changes. Thereby, it becomes possible to match the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c.

  In the present embodiment, the stub 16g is moved in the longitudinal direction of the waveguide 16b. However, the present invention is not limited to this, and the size and length of the stub 16g may be changed. Thereby, the impedance of a microwave circuit changes and it becomes possible to match the impedance between the antenna 16a1 and the plastic bottle drink X stored in the storage cylinder 16c.

  In the heating unit 16 configured in this manner, it is stored in the storage cylinder 16c from the direction of the spout of the PET bottle beverage X, and the microwaves are irradiated from the antenna 16a1 to the squeezed portion of the PET bottle beverage X. The convection of the beverage can be efficiently guided, and the plastic bottle beverage X can be heated uniformly.

  In this embodiment, one heater 16a and one waveguide 16b are provided. However, the present invention is not limited to this, and a plurality of heaters 16a and waveguides 16b may be provided. Thereby, a microwave is irradiated to the plastic bottle drink X from a plurality of directions, and it becomes possible to heat in a shorter time.

  As shown in FIG. 6, the control unit 20 is for controlling the entire food heating apparatus 10 and is a well-known computer including a CPU, a memory such as a RAM and a ROM, and the like. The control unit 20 is connected with a storage unit 21, a display device 11, a speaker 12, a heater 16a, an upper lid 16d, a lower lid 16e, and a motor 19a, and is based on a program stored in its own memory. A control signal is output.

  The storage unit 21 includes a rewritable storage element such as an EEPROM, and stores character data 21a, voice data 21b, stub position data 21c, and the like. In addition, the storage unit 21 outputs character data 21 a, voice data 21 b, or stub position data 21 c to the control unit 20 based on a control signal input from the control unit 20. The stub position data 21c is obtained in advance from the position of the stub 16g where the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c matches.

  The display device 11 displays character data 21 a input from the control unit 20, and the speaker 12 outputs voice data 21 b input from the control unit 20.

  The heater 16a emits microwaves based on the control signal input from the control unit 20, and the upper cover 16d opens and closes the upper surface opening of the storage cylinder 16c based on the control signal input from the control unit 20, and the lower cover 16e is configured to open and close part of the lower plate surface 16h based on a control signal input from the control unit 20. The control unit 20 outputs a control signal to the motor 19a based on the stub position data 21c input from the storage unit 21, and the motor 19a passes through the arm 19b based on the control signal input from the control unit 20. The stub 16g is moved in the longitudinal direction of the waveguide 16b.

  As shown in FIG. 7, when the food heating apparatus 10 is activated, the control unit 20 performs an initial process (step S11). That is, the control unit 20 opens the upper lid 16d, closes the lower lid 16e, reads the character data 21a or the voice data 21b from the storage unit 21, and says, for example, “Put a plastic bottle drink from the spout direction”. Is displayed on the display device 11 or outputted from the speaker 12 by voice.

  Next, the control unit 20 determines whether or not the plastic bottle beverage X is introduced from the food inlet 13 and stored in the storage cylinder 16c (step S12), and the process of step S12 is performed until the plastic bottle beverage X is stored. Repeat. In the present embodiment, a micro switch (not shown) is provided on the lower lid 16e to output food detection data to the control unit 20, and the control unit 20 uses the detection data input from the micro switch (not shown). It is determined whether or not the plastic bottle drink X is stored.

  As a result of the determination, when the plastic bottle beverage X is stored in the storage cylinder 16c, the control unit 20 closes the upper lid 16d (step S13).

  Next, the control unit 20 drives the motor 19a based on the stub position data 21c read from the storage unit 21 so that the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c matches the stub. 16g is moved (step S14).

  Here, when the microwave is emitted from the antenna 16a1, the microwave (incident wave) emitted from the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c are not absorbed in the waveguide 16b. Periodic standing waves are generated by the reflected microwaves (reflected waves). The electric field and the magnetic field due to the standing wave have a phase difference of λ / 4. As shown in FIG. 8, when the electric field strength is maximum (E1) at a predetermined position in the longitudinal direction of the waveguide 16b, for example, at the position P1, the magnetic field The intensity is zero, and the electric field intensity is zero when the magnetic field intensity is maximum (M1) at position P2 delayed by λ / 4. Thus, by moving the stub 16g to a position where the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c is matched, the position P1 and the storage cylinder 16c where the electric field strength due to the standing wave is maximized. And the position of the plastic bottle drink X stored in the same.

  As described above, the same applies to the case where the control unit 20 changes the size and length of the stub 16g so that the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c matches. is there.

  Next, the controller 20 drives the heater 16a to heat the plastic bottle beverage X to a predetermined temperature (step S15), and after the heating is finished, opens the lower lid 16e (step S16) and carries it out of the storage cylinder 16c. The plastic bottle drink X is carried out to the food outlet 14 via the part 17.

  At the same time, the control unit 20 reads the character data 21a or the voice data 21b from the storage unit 21 and displays, for example, a message “heating is completed” on the display device 11 or outputs it from the speaker 12 by voice ( Step S17).

  After the process of step S17, the control unit 20 repeatedly performs the processes of step S11 to step S17 until the food heating device 10 stops.

  Thus, according to the present embodiment, the electric field strength due to the standing wave is maximized by driving the stub 16g so that the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c is matched. Since the position P1 and the position of the plastic bottle beverage X stored in the storage cylinder 16c are matched, the heating efficiency by microwaves can be maximized with respect to the plastic bottle beverage X. The food heating apparatus 10 can be reduced in size and simplified, the heating time can be shortened, and the service to the user can be improved.

  9 to 13 show a second embodiment of the present invention. FIG. 9 is a schematic sectional side view of the heating unit, FIG. 10 is a top view of the heating unit shown in FIG. 9, and FIG. FIG. 12 is a block diagram showing a control system configuration of the food heating apparatus, and FIG. 13 is a flowchart showing a heating operation of the food heating apparatus.

  The difference between the second embodiment and the first embodiment is that the plastic bottle drink X is moved instead of driving the stub 16g. Note that the same components as those of the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  That is, as shown in FIG. 9, a circular concave portion 16e1 is formed at a predetermined position of the lower lid 16e, and when the plastic bottle beverage X is stored in the storage cylinder 16c, the cap X1 and the concave portion 16e1 of the plastic bottle beverage X are stored. And come to contact.

  As shown in FIG. 10, the antenna 16a1, the stub 16g, and the recess 16e1 are provided on the central axis C of the waveguide 16b. The center of the recess 16e1 coincides with the position P3 on the central axis C of the waveguide 16b. Here, the position P3 is set to a position where the electric field strength is maximum in the standing wave shown in FIG.

  As shown in FIG. 11, the recess 16e1 has a diameter larger than the diameter of the cap X1, and when the plastic bottle drink X is stored in the storage cylinder 16c, the center of the cap X1 is the position P3 of the center of the recess 16e1. (See FIG. 11A). Therefore, a solenoid 22 with a spring is provided on the four sides of the cap X1, and the center of the cap X1 is moved to the position P3 by the solenoid 22 with a spring (see FIG. 11B).

  As shown in FIG. 12, the stub position data 21c stored in the first embodiment is not stored in the storage unit 21A, and a solenoid with spring 22 is connected to the control unit 20A instead of the motor 19a. . Each spring-equipped solenoid 22 moves the cap X1 based on a control signal from the control unit 20A.

  As shown in FIG. 13, after performing the processing of step S11 to step S13 in the same manner as in the first embodiment, instead of step S14, the control unit 20A drives each solenoid 22 with a spring, and the cap X1, that is, the pet The bottle beverage X is moved to the position P3 (step S18). Thereby, the position P3 where the electric field intensity due to the standing wave is maximum coincides with the position of the plastic bottle beverage X stored in the storage cylinder 16c.

  Thereafter, similarly to the first embodiment, the control unit 20A performs the processes of step S15 to step S17, and repeatedly performs the processes of step S11 to step S17 until the food heating device 10 stops.

  As described above, according to the present embodiment, by moving the food to the position P3 on the central axis C of the waveguide 16b, which is the traveling direction of the microwave emitted from the antenna 16a1, the electric field intensity due to the standing wave is maximized. Since the position P3 and the position of the plastic bottle beverage X stored in the storage cylinder 16c are matched, the same effect as in the first embodiment can be obtained.

  In this embodiment, instead of driving the stub 16g, the plastic bottle drink X is moved. However, the present invention is not limited to this, and the stub 16g is driven and the plastic bottle drink X is moved. Good.

  14 to 17 show a third embodiment of the present invention. FIG. 14 is an enlarged cross-sectional view of a pipe and a temperature measuring unit provided in the food heating apparatus, and FIG. 15 is a diagram of the food heating apparatus shown in FIG. FIG. 16 is a flowchart showing the heating operation of the food heating apparatus shown in FIG. 14, and FIG. 17 is a graph for explaining the temperature change of the plastic bottle beverage.

  The difference between the third embodiment and the first embodiment is that the stub 16g is driven based on the temperature change of the food. Note that the same components as those of the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

That is, as shown in FIG. 14, the temperature measurement unit 23 is composed of a known infrared radiation thermometer 23a, a case 23b, and a screw 23c. The temperature measurement unit 23 has a squeezed portion X2 of the plastic bottle beverage X stored in the storage cylinder 16c. The temperature is being measured. here,
Since the plastic bottle drink X is stored in the storage cylinder 16c from the spout direction, the air layer in the plastic bottle exists on the bottom surface of the plastic bottle and does not exist in the throttle portion X2. In general, there is no label covering the PET bottle in the throttle portion X2, or there is no gap (air layer) even if it exists. Further, the diaphragm portion X2 is not thicker than other portions such as the bottom surface and the cap. Therefore, by measuring the temperature of the squeezed portion X2 of the plastic bottle beverage X, the temperature of the beverage stored in the plastic bottle can be accurately measured.

  In this embodiment, the plastic bottle drink X is stored in the storage cylinder 16c from the spout direction. However, the present invention is not limited to this, and is stored in the storage cylinder 16c from the bottom direction to measure the temperature of the squeezing portion X2. It may be.

  The infrared radiation thermometer 23a can change the measurement angle θ, receives the infrared radiation emitted from the measurement range A of the aperture X2, and outputs a temperature signal.

  The case 23b covers the infrared radiation thermometer 23a and is attached to the pipe 24 with a screw 23c. As described above, the infrared radiation thermometer 23a is covered with the case 23b to reduce the influence of infrared rays other than the measurement range A, and the case 23b is attached to the pipe 24 with the screw 23c, so that the attachment / detachment is facilitated.

  When the case 23 b is attached to the pipe 24, the infrared radiation thermometer 23 a is disposed on the central axis C 1 of the pipe 24. Thereby, the measurement angle θ can be maximized.

  The pipe 24 is provided in the horizontal direction of the plastic bottle beverage X stored in the storage cylinder 16c, and communicates the storage cylinder 16c with the temperature measurement unit 23.

  As shown in FIG. 15, the stub position data 21c stored in the first embodiment is not stored in the storage unit 21B, and the control unit 20B includes the storage unit 21B, the display device 11, the speaker 12, and the heater. In addition to 16a, the upper lid 16d, the lower lid 16e, and the motor 19a, an infrared radiation thermometer 23a is connected.

  The infrared radiation thermometer 23a outputs the temperature signal of the aperture X2 to the control unit 20B, the control unit 20B outputs a control signal to the motor 19a based on the temperature signal input from the infrared radiation thermometer 23a, and the motor 19a Based on the control signal input from the control unit 20B, the stub 16g is moved in the longitudinal direction of the waveguide 16b via the arm 19b.

  As shown in FIG. 16, after performing the process of step S11-step S13 similarly to 1st Embodiment, it replaces with step S14 and step S15, and the control part 20B drives the heater 16a and is a plastic bottle drink. Heating is started so that X reaches a predetermined temperature, and the motor 19a is driven to move within the movable range of the stub 16g (step S19).

  At the same time, the control unit 20B calculates the temperature change per unit time of the plastic bottle beverage X from the temperature signal input from the infrared radiation thermometer 23a (step S20). As shown in FIG. 17, the temperature change of the PET bottle beverage X varies depending on the position of the stub 16g, and the position P4 where the temperature change of the PET bottle beverage X is maximum (T1) exists within the movable range of the stub 16g. Therefore, the controller 20B drives the motor 19a while heating the plastic bottle beverage X, and moves the stub 16g to the position P4 obtained from the calculated temperature change of the plastic bottle beverage X (step S21). Thereby, the stub 16g can be moved to the position P4 where the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c is matched, and the position where the electric field strength due to the standing wave is maximized and the storage cylinder 16c. And the position of the plastic bottle drink X stored in the same.

  After the heating is completed, the control unit 20B performs the processes of Step S16 and Step S17, and repeats the processes of Step S11 to Step S17 until the food heating device 10 stops, as in the first embodiment.

  When the position P4 is obtained, it may be stored in the storage unit 21 as the stub position data 21c, and the subsequent processing may be performed in the same manner as in the first embodiment.

  Thus, according to the present embodiment, the temperature change per unit time of the plastic bottle beverage X is calculated, and the stub 16g is moved to the position P4 where the calculated temperature change of the plastic bottle beverage X is maximized. The stub 16g can be moved to the position P4 where the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c matches, and the storage cylinder 16c stores the position where the electric field strength due to the standing wave is maximized. Since the position of the plastic bottle beverage X matches, the same effect as in the first embodiment can be obtained even if the position P4 of the stub 16g where the impedance is matched is not stored in advance.

  In the present embodiment, the stub 16g is moved within the movable range of the stub 16g and moved to the position P4 where the temperature change of the plastic bottle beverage X is maximized. However, the present invention is not limited to this. You may make it change stub 16g to the magnitude | size and length which change a sheath length and the temperature change of PET bottle drink X becomes the maximum.

  18 to 22 show a fourth embodiment of the present invention. FIG. 18 is a front view of the food heating apparatus, FIG. 19 is a block diagram showing a control system configuration of the food heating apparatus shown in FIG. Is a graph explaining the temperature change for each type of PET bottle beverage, FIG. 21 is a block diagram showing a modification of the control system configuration of the food heating apparatus shown in FIG. 18, and FIG. It is a flowchart which shows heating operation.

  The difference between the fourth embodiment and the first embodiment is that the stub 16g is driven based on the identification information given to the plastic bottle beverage X. Note that the same components as those of the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

  That is, as shown in FIG. 19, the barcode reader 25 is a well-known barcode reader composed of a laser-type or CCD-type scanner or the like, and has a food inlet 13 provided on the front surface of the food heating device 10C. It is placed beside and reads barcodes printed on plastic bottle drinks.

  In the present embodiment, the bar code reader 25 is provided to read the bar code of the food. However, the present invention is not limited to this, and a QR code or an ST code may be used as long as the food can be identified.

  As shown in FIG. 19, a barcode reader 25 is connected to the control unit 20C in addition to the storage unit 21C, the display device 11, the speaker 12, the heater 16a, the upper lid 16d, the lower lid 16e, and the motor 19a. .

  The barcode reader 25 outputs the barcode data read from the plastic bottle beverage X to the control unit 20C.

  In general, the temperature change of food due to microwaves varies depending on the shape of the container (pet bottle), the moisture content of the food, and the like, and as shown in FIG. ) And position P5 where the temperature change of the type B plastic bottle beverage is maximum (T2). Accordingly, the storage unit 21C stores a plurality of stub position data 21c corresponding to the type of the plastic bottle drink X in addition to the character data 21a and the voice data 21b.

  In this embodiment, the barcode reader 26 is provided. However, the present invention is not limited to this, and the food data receiver 26 may be provided at a predetermined position of the food heating apparatus 10C as shown in FIG. .

  In the figure, a plurality of vending machines 30 installed outside the food heating device 10C sells plastic bottle drinks X, respectively, and are set in each column of the vending machine 30 when selling food. The unique food data given to the food stored in each column is transmitted. The food data receiver 26 receives food data transmitted from each vending machine 30 and outputs it to the control unit 20C. Note that the food data transmission / reception method may be wired or wireless, and there may be one vending machine 30.

  As shown in FIG. 22, after performing the processing of step S11 to step S13 as in the first embodiment, the control unit 20C determines whether or not the barcode data input from the barcode reader 25 is a predetermined barcode. Determination is made (step S22).

  If a predetermined barcode is input as a result of this determination, the control unit 20C reads stub position data 21c corresponding to the predetermined barcode from the storage unit 21C (step S23), and based on the read stub position data 21c. The motor 19a is driven to move the stub 16g to a position where the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c is matched (step S14). Thereby, the stub 16g can be moved to the positions P4 and P5 where the impedance between the antenna 16a1 and the plastic bottle beverage X stored in the storage cylinder 16c is matched, and the position where the electric field strength due to the standing wave is maximum is stored. The position of the plastic bottle drink X stored in the cylinder 16c matches.

  Thereafter, similarly to the first embodiment, the control unit 20C performs the processes of step S15 to step S17.

  When the predetermined barcode is not input as a result of the determination in step S22, the control unit 20C opens the lower lid 16e (step S24), and the plastic bottle drink X is supplied from the storage cylinder 16c to the food outlet 14 via the carry-out unit 17. Take it out.

  At the same time, the control unit 20C reads the character data 21a or the voice data 21b from the storage unit 21C and, for example, “Please hold the barcode of the plastic bottle beverage over the barcode reader and then insert the plastic bottle beverage”. The message is displayed on the display device 11 or outputted from the speaker 12 by voice (step S25).

  After the process of step S17 or step 25, the control unit 20C repeatedly performs the processes of step S11 to step S17 until the food heating device 10C stops.

  In the present embodiment, when a predetermined barcode is not input, the control unit 20C opens the lower lid 16e and carries out the plastic bottle drink X to the food take-out port 14. However, the present invention is not limited to this. Similarly to the embodiment, an infrared radiation thermometer 23a may be provided to calculate a temperature change per unit time of the plastic bottle beverage X, and the stub 16g may be moved to a position where the calculated temperature change is maximized. .

  Thus, according to the present embodiment, the identification information given to the plastic bottle beverage X is detected, and the stub 16g is moved to the positions P4 and P5 corresponding to the detected identification information, so that the antenna 16a1 and the storage cylinder The stub 16g can be moved to positions P4 and P5 where impedances between the plastic bottle drink X stored in 16c match and the position where the electric field strength due to the standing wave becomes maximum, and the plastic bottle stored in the storage cylinder 16c. Since the position of the beverage X matches, the same effect as the first embodiment can be obtained for a plurality of types of plastic bottle beverages.

  In addition, when the food heating device 10C is provided inside the bucket type vending machine that sells the plastic bottle beverage X, and the plastic bottle beverage X is sold, the bucket (conveying mechanism) causes the plastic bottle beverage X from the spout direction. When the food data is input to the food input port 13 and the food data is transmitted from the vending machine main body to the food data receiver 26, the same effect as the present embodiment can be obtained.

  In addition, the structure of this invention may combine the structure of each said embodiment, or may replace a one part structure part.

  The configuration of the present invention is not limited to the above embodiments, and various modifications may be made without departing from the spirit of the present invention.

Front view of food heating device Schematic side sectional view of the food heating apparatus shown in FIG. Enlarged side view of the heating section shown in FIG. Sectional drawing explaining the state which stored the plastic bottle drink for hot in the heating part shown in FIG. FIG. 4 is an enlarged top view for explaining the operation of the stub shown in FIG. The block diagram which shows the control system structure of the food heating apparatus shown in FIG. The flowchart which shows the heating operation of the food heating apparatus shown in FIG. Waveform diagram explaining the standing wave of the microwave in the waveguide shown in FIG. Schematic side sectional view of the heating section Top view of the heating unit shown in FIG. Schematic top view for explaining the movement of the plastic bottle beverage stored in the storage cylinder 16c Block diagram showing control system configuration of food heating device Flow chart showing the heating operation of the food heating device Expanded cross-sectional view of the pipe and temperature measurement unit provided in the food heating device The block diagram which shows the control system structure of the food heating apparatus shown in FIG. The flowchart which shows the heating operation of the food heating apparatus shown in FIG. Graph explaining temperature change of plastic bottle drink Front view of food heating device The block diagram which shows the control system structure of the food heating apparatus shown in FIG. Graph explaining temperature change for each type of plastic bottle drink The block diagram which shows the modification of the control system structure of the food heating apparatus shown in FIG. The flowchart which shows the heating operation of the food heating apparatus shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10,10C ... Food heating apparatus, 16 ... Heating part, 16a ... Heater, 16a1 ... Antenna, 16b ... Waveguide, 16c ... Storage cylinder, Stub ... 16g, 19a ... Motor, 19b ... Arm, 20, 20A, 20B , 20C ... control unit, 22 ... solenoid with spring, 23a ... infrared radiation thermometer, 25 ... bar code reader, 26 ... food data receiver, X ... plastic bottle beverage.

Claims (9)

In a food heating apparatus that includes a storage unit in which food in a container is stored from the outside, and a magnetron that emits the generated microwave from the antenna, and the food stored in the storage unit is heated by microwaves.
A food heating apparatus comprising an adjusting means for matching a position where the electric field intensity caused by the microwave is maximized with a position of the food stored in the storage unit. The food heating apparatus according to claim 1, wherein the adjustment unit includes a food moving unit that moves the food to a predetermined position in a traveling direction of the microwave emitted from the antenna. A waveguide for propagating microwaves emitted from the antenna to a storage unit;
A stub mounted in the waveguide and capable of changing the impedance between the antenna and the food stored in the storage;
The food heating apparatus according to claim 1 or 2, wherein the adjustment means includes stub driving means for driving the stub so that impedance between the antenna and the food matches. The food heating apparatus according to claim 3, wherein the stub driving means includes means for moving the stub in the longitudinal direction of the waveguide. The food heating apparatus according to claim 3 or 4, wherein the stub driving means includes means for changing a volume of the stub. Temperature measuring means for measuring the temperature of the food;
Temperature change calculating means for calculating the temperature change of the food per unit time,
The food heating apparatus according to any one of claims 3 to 5, wherein the stub driving means is operated based on a temperature change of the food calculated by the temperature change calculating means. Comprising identification information detecting means for detecting identification information given to the food,
The food heating apparatus according to any one of claims 3 to 5, wherein the stub driving means is operated based on the food identification information detected by the identification information detecting means. The food heating apparatus according to claim 7, wherein the identification information detection unit includes a reception unit that receives identification information from at least one vending machine that sells food. In vending machines that sell food in containers,
A vending machine comprising the food heating device according to any one of claims 1 to 8.

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