JP2016186370A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a dehumidification amount at operation start time of a heating cooker.SOLUTION: A heating cooker includes: a control device 50 which has a function of executing a maintenance mode for determining quality of a heating unit 20, based on an internal temperature tmp detected in a temperature detection unit 61; and a display unit 40 for displaying a state of the heating unit when the maintenance mode is executed in the control device 50. The control device 50 includes: a drive control unit 51 for driving the heating unit 20 when executing the maintenance mode; a quality determination unit 53 for determining whether or not a heating chamber is operating normally, based on elapsed time TI from when the drive of the heating unit by the maintenance mode is started in the drive control unit 51 until when the internal temperature tmp has become preset temperature; and a display control unit 55 for displaying the determination result by the quality determination unit 53 on the display unit 40.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cooking device capable of performing a check mode for determining whether a heating operation in a heating chamber is good or bad.

  In a heating cooker such as a gas cooker, it has been proposed to execute a maintenance mode in order to diagnose whether or not a failure has occurred and display the determination result (see, for example, Patent Document 1). In Patent Document 1, when a malfunction occurs in the gas burner, an error code indicating the contents of the malfunction is displayed on the display unit, or a buzzer or voice error notification is issued to alert the user to maintenance. A gas cooker with a display device is disclosed.

JP 2001-173957 A

  As in Patent Document 1, it is desired to determine not only the failure of the burner provided on the upper surface of the apparatus body but also the failure of the heating chamber (grill chamber). In particular, it is difficult for the heating chamber to visually recognize the situation from the outside, and it is difficult to confirm whether the problem is caused by the abnormality of the equipment of the heating cooker or the user's usage. As a result, when an abnormality occurs in the heating chamber, for example, it is necessary to take and analyze the cooking device from the user, which takes time.

  The present invention has been made in order to solve the above-described problems, and when cooking is abnormal in use of the heating chamber, it is possible to efficiently determine whether or not the equipment is abnormal. The purpose is to provide a vessel.

  The cooking device of the present invention includes a cooking device body having a heating chamber in which an object to be heated is accommodated, a heating unit for heating the object to be heated accommodated in the heating chamber, and detecting the temperature in the heating chamber as the internal temperature. A control unit for executing a maintenance mode for determining whether or not heating in the heating chamber can be normally performed based on the temperature in the chamber detected by the temperature detection unit, and the control device A display unit that displays the state of the heating chamber when the maintenance mode is executed, and the control device is configured to start driving the heating unit at the start of the maintenance mode, and to control the drive control unit. When the heating unit heated the heating chamber, it was determined that the internal temperature reached the set temperature in the temperature determination unit that determines whether or not the internal temperature reached the set temperature. In addition, based on the elapsed time from the start of heating to the set temperature, the quality determination unit for determining whether or not the state of the heating chamber is normal, and the determination result by the quality determination unit are displayed on the display unit. A display control unit.

  According to the heating cooker of the present invention, whether or not the heating chamber is operating normally is determined based on the elapsed time from the start of driving of the heating unit in the maintenance mode until the inside temperature reaches the set temperature. By determining and displaying the determination result on the display unit, when abnormality occurs in the use of the heating chamber, it is possible to efficiently determine whether the abnormality is caused by the usage method or the abnormality of the device. it can.

It is a schematic diagram which shows the structure of the heating cooker which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the II-II cross section of the heating cooker of FIG. It is a functional block diagram which shows an example of the control apparatus in the heating cooker of FIG. It is a graph which shows an example of the preset temperature set in the quality determination part of FIG. It is a schematic diagram which shows an example of the display part which displayed the availability of the start of check mode in the display control part of FIG. It is a schematic diagram which shows an example of the screen transition displayed on a display part by control of the display control part of FIG. It is a schematic diagram which shows an example of the display part by which the log | history of the determination result was displayed by the display control part of FIG. It is a schematic diagram which shows an example of the display part by which the description content was displayed by the display control part of FIG. It is a flowchart which shows the operation example at the time of the maintenance mode by the control apparatus of FIG. It is a functional block diagram which shows the structure of the control apparatus of the heating cooker which concerns on Embodiment 2 of this invention. It is a schematic diagram which shows an example of the time setting table in FIG. It is a flowchart which shows the operation example at the time of the maintenance mode by the control apparatus of FIG. It is a functional block diagram which shows the structure of the control apparatus of the heating cooker which concerns on Embodiment 3 of this invention. It is a schematic diagram which shows an example of the display of a display part at the time of correct | amending cooking time in the drive table of the drive control part of FIG. It is a schematic diagram which shows an example of the display of a display part at the time of correct | amending an electricity supply rate in the drive table of the drive control part of FIG.

Embodiment 1 FIG.
Hereinafter, embodiments of the heating cooker of the present invention will be described with reference to the drawings. 1 is a schematic diagram showing a configuration of a heating cooker according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view showing a II-II section of the heating cooker of FIG. The cooking device 1 in FIG. 1 includes a cooking device main body 2 that is a substantially rectangular housing, a top plate 3 that is provided on the cooking device main body 2 and on which a cooking container into which an object to be heated is placed is placed, It has the operation part 30 for a user to instruct | indicate the heating to the heating unit 20, etc., and the display part 40 which displays the operation | movement condition etc. of the heating cooker 1. FIG.

  An induction heating coil 4 for heating the cooking container placed on the top plate 3 and a control device (not shown) for controlling the induction heating coil 4 are arranged inside the cooker body 2. For example, three induction heating coils 4 are arranged in a state of being housed in a coil case, and high frequency power is supplied to each induction heating coil 4 from a power supply circuit. A top plate 3 is disposed on the induction heating coil 4. The top plate 3 has a structure in which a plate-like crystallized glass is fitted into a frame having a top frame made of a metal such as stainless steel. On the surface of the top plate 3, a circular installation position indicator 4 a is printed for the purpose of indicating a position where the induction heating coil 4 in the cooker body 2 is disposed.

  Moreover, the heating chamber 10 for heating to-be-heated objects, such as a fish, is formed in the inside of the cooking appliance main body 2, for example. The heating chamber 10 is a substantially rectangular parallelepiped space, and a front opening is formed in the front and a rear opening is formed in the rear. A grill door 11 is attached to the front opening of the heating chamber 10 so as to be openable and closable. The grill door 11 is attached with a tray 12 for receiving water or oil, and the tray 12 slides along the rail in the heating chamber 10 as the grill door 11 opens and closes. In addition, a shelf network 13 on which an object to be heated is placed is disposed on the tray 12.

  The heating cooker 1 includes a heating unit 20 that heats an object to be heated accommodated in the heating chamber 10, and the heating unit 20 includes a heater 21 that heats the object to be heated from above the heating chamber 10, and a heating chamber. 10 is provided with a hot air supply unit (convection unit) 22 that heats an object to be heated by causing convection inside the heating chamber 10 to circulate heat.

  The heater 21 heats an object to be heated in the heating chamber 10 from above with radiant heat, and is composed of, for example, a sheathed heater that is a resistance heating element. The heater 21 is connected to a power circuit (not shown) and generates heat when power is supplied from the power circuit. The heater 21 has a shape bent a plurality of times in the width direction and the depth direction of the heating chamber 10, and can be heated in a wide range in the width direction and the depth direction in the heating chamber 10. In addition, although the heater 21 has illustrated about the case where it consists of a sheathed heater, you may use a far-infrared heater, a near-infrared heater, or a carbon heater etc., for example.

  The hot air supply unit 22 sucks and heats the air in the heating chamber 10 and circulates the heated air to the heating chamber 10 again. The hot air supply unit 22 is housed in the housing 22a, a convection fan 22b that blows air heated in the convection heater 22d into the heating chamber 10, a motor 22c that rotates the convection fan 22b, and the housing 22a. And a convection heater 22d that heats the air in the housing 22a.

  The housing 22 a has a structure communicating with the heating chamber 10 so that air circulation (convection) is performed between the housing 22 a and the heating chamber 10. A suction port 2 a for sucking air in the heating chamber is provided in the upper part of the heating chamber 10, and a supply port 2 b for supplying heated air in the housing 22 a is provided in the lower part of the back surface of the heating chamber 10. In addition, a suction duct 2c that guides air sucked from the suction port 2a to the housing 22a is provided in the upper portion of the heating chamber 10, and an opening that leads to the suction duct 2c is formed in the housing 22a. Further, an exhaust duct 2d communicating with the discharge port 2x on the back side of the cooker body 2 is connected to the upper portion of the housing 22a, and air in the heating chamber 10 is exhausted from the exhaust duct 2d.

  The convection fan 22b sucks air in the heating chamber 10 from the suction port 2a into the housing 22a, and supplies air in the housing 22a into the heating chamber 10 from the supply port 2b. The convection fan 22b is fixed to the rotating shaft of the motor 22c and rotates by the operation of the motor 22c. The motor 22c is a DC motor or an induction motor, and a convection fan 22b is attached to the motor 22c.

  The convection heater 22d heats the air in the housing 22a, and is composed of, for example, a sheathed heater. The convection heater 22d is connected to a power circuit (not shown), and generates heat when power is supplied from the power circuit. The convection heater 22d is provided so as to surround the convection fan 22b. By rotating the convection fan 22b, the air in the housing 22a heated by the convection heater 22d is supplied to the heating chamber 10 from the supply port 2b. Although the convection heater 22d is illustrated as using a sheathed heater, a glass tube heater such as a ceramic heater, a nichrome wire heater, a halogen lamp heater, or a carbon heater may be used.

  The air in the housing 22a is heated by the convection heater 22d, and is supplied from below the heating chamber 10 by driving the convection fan 22b. The hot air supplied into the heating chamber 10 flows along the tray 12 from the back surface to the front surface of the heating chamber 10, rises on the front surface side of the heating chamber 10, and is sucked from the suction port 2a. The air sucked from the suction port 2a is supplied again into the housing 22a through the suction duct 2c, and a part of the air in the housing 22a is exhausted from the exhaust duct 2d, and a part of the air is heated and the heating chamber 10 is heated. To be supplied. In this way, the hot air supply unit 22 sucks and heats the air in the heating chamber 10 and circulates the heated air to the heating chamber 10 again.

  The operation unit 30 in FIG. 1 includes operation buttons, switches, encoders, and the like for accepting settings for heating operation in the heating cooker 1. The operation unit 30 includes an upper surface operation unit 30 a provided on the top plate 3 and a front operation unit 30 b provided on the right front surface of the cooker body 2. The display unit 40 is provided on the front side of the top plate 3 and displays the operation state of the heating cooker 1, the input content to the operation unit 30, and notifies the user of the state of the heating cooker 1 and the like. In addition, the display part 40 consists of the touchscreen using an electrostatic capacitance switch, for example, and while functioning as the display part 40, it may function as the operation part 30.

  FIG. 3 is a functional block diagram illustrating an example of a control device in the cooking device of FIG. The operation of the heating cooker 1 described above is controlled by the control device 50. The control device 50 is composed of a microcomputer, a DSP, or the like, and has a built-in storage means (not shown). The cooking device 1 has various sensors, and the control device 50 has a function of controlling the operation of the cooking device 1 based on information detected by the various sensors.

  In particular, the control device 50 has a maintenance mode that automatically determines whether or not cooking of the object to be heated in the heating chamber 10 can be normally performed based on information from various sensors. Has the function to execute. Specifically, the heating cooker 1 includes a temperature detection unit 61 that detects the temperature in the heating chamber 10, a power supply voltage detection unit 62 that detects the power supply voltage V supplied to the heating unit 20, and the power supply voltage V A power frequency detector 63 for detecting the power frequency f.

  The temperature detection unit 61 includes, for example, a thermistor installed on the back side in the heating chamber 10 and detects the temperature in the heating chamber 10. In addition, as long as the temperature detection part 61 detects the temperature of the heating chamber 10, regardless of the structure, you may apply well-known techniques, such as an infrared sensor, for example, about the installation place of the temperature detection part 61 May also be installed on the front side of the heating chamber 10 or in the housing 22a.

  The power supply voltage detector 62 detects the power supply voltage V supplied to the power supply circuit, and the power supply frequency detector 63 detects the power supply frequency f (for example, 50 Hz or 60 Hz) of the AC power supplied to the power supply circuit. To do. When the power supply voltage V supplied to the power supply circuit varies, the power supplied to the heating unit 20 (the heater 21 and the convection heater 22d) varies. Further, the higher the frequency f of the AC power supplied to the power supply circuit, the greater the output of the convection fan 22b.

  Control device 50 is in a state where cooking of the object to be heated can be performed normally in heating chamber 10 based on the information detected by temperature detection unit 61, power supply voltage detection unit 62, and power supply frequency detection unit 63 described above. Judge the quality of the. For example, when the heating unit 20 has a defect and heating in the heating chamber 10 becomes insufficient, the heating chamber 10 is abnormal because the cooking of the object to be heated cannot be performed normally. judge. Further, when the state of the heating chamber 10 cannot be accurately detected due to improper mounting of the temperature detection unit 61 or abnormality in detection performance, or when the convection fan 22b is not driven normally, or the discharge port 2x is blocked. Even when an abnormality occurs in the air flow, it is determined that an abnormality has occurred in the heating chamber 10 because cooking of the object to be heated cannot be performed normally.

  The control device 50 includes a drive control unit 51, a temperature determination unit 52, a pass / fail determination unit 53, a voltage determination unit 54, a display control unit 55, and the like. The drive control unit 51 controls driving of the heating unit 20 and controls to start driving the heating unit 20 when the maintenance mode is started. At this time, the drive control unit 51 controls the heating unit 20 so as to drive both the heater 21 and the hot air supply unit 22 so as to have, for example, a predetermined predetermined thermal power. In addition, although the drive control part 51 illustrated about the case where both the heater 21 and the hot air supply part 22 are driven, in order to perform the quality determination separately for the heater 21 and the hot air supply part 22, respectively, It is also possible to drive only.

  The temperature determination unit 52 determines whether or not the internal temperature tmp has reached a set temperature when the heating unit 20 heats the heating chamber 10 under the control of the drive control unit 51. Here, two set temperatures are set in the temperature determination unit 52, and it is determined whether one of the two set temperatures is satisfied. FIG. 4 is a graph showing an example of the set temperature set in the temperature determination unit of FIG. As shown in FIG. 4, the temperature determination unit 52 starts the determination of the temperature t1 + Δt obtained by adding the set temperature increase Δt to the temperature t1 after the initial heating period T1 (for example, 6 minutes) has passed, and the heating limit temperature. Both the temperature t3 and the set temperature are set. Then, the temperature determination unit 52 determines whether or not the internal temperature tmp reaches either the temperature t1 + Δt or the determination start temperature t3.

  As described above, by setting the set temperature based on the set temperature increase amount Δt after the initial heating period T1 has elapsed, it is possible to accurately determine whether the heating cooker 1 is individual or not. . That is, the internal temperature tmp detected by the temperature detection unit 61 varies, for example, around 20 ° C. due to individual differences in the heating cooker 1. For this reason, when a predetermined temperature threshold is used, it is difficult to set a determination criterion, and it may not be possible to accurately determine whether it is good or bad. On the other hand, when the set temperature is set to the temperature t1 + Δt obtained by adding the set temperature increase Δt to the temperature t1 of the heating chamber 10 due to the heating in the initial heating period T1, the temperature t1 varies due to individual differences of the heating cooker 1. However, the quality determination is performed using the time from the temperature t1 until the temperature rises by the set temperature rise amount Δt. Thereby, regardless of the individual difference of the heating cooker 1, the quality can be determined with high accuracy.

  Furthermore, the temperature determination unit 52 has a function of changing the value of the set temperature increase Δt according to the power supply frequency f of the AC power supply. The temperature determination unit 52 stores a set temperature increase Δt for each power supply frequency f (for example, 50 Hz, 60 Hz). The temperature determination unit 52 sets the set temperature according to the power supply frequency f detected by the power supply frequency detection unit 63. A rising amount Δt is set. In this way, it is possible to perform the quality determination with high accuracy in consideration of the fact that the output of the convection fan 22b increases as the power supply frequency f increases. In addition, although the case where temperature t1 + Δt and determination start temperature t3 are set as set temperatures is illustrated, only one of them may be set.

  When the temperature determination unit 52 determines that the internal temperature tmp has reached the set temperature, the quality determination unit 53 in FIG. 3 determines that the heating chamber 10 is based on the elapsed time TI from the start of heating to the set temperature. It is determined whether or not it is operating normally. The pass / fail determination unit 53 starts measurement of the elapsed time TI in synchronization with the drive of the heating unit 20 by the drive control unit 51 when the check mode start is input in the operation unit 30. A set time range Tc to Td is set in advance in the pass / fail judgment unit 53, and the pass / fail judgment unit 53 sets an elapsed time TI when the internal temperature tmp reaches the set temperature after the initial heating period T1 has elapsed. When it is within the time range Tc to Td (for example, 6 minutes to 10 minutes), it is determined that the heating chamber 10 is operating normally. On the other hand, when the elapsed time TI is out of the set time range Tc to Td, it is determined that an abnormality has occurred in the heating chamber 10. Further, when the determination by the pass / fail determination unit 53 is made, the drive control unit 51 stops the driving of the heating unit 20. Similarly, when the elapsed time TI is outside the set time range Tc to Td and the internal temperature tmp reaches the determination start temperature t3 that is the heating limit temperature, the drive control unit 51 similarly stops driving the heating unit 20.

  Further, the control device 50 has a function of determining whether or not the check mode can be executed when the check mode is selected by an operation of a user such as a service person. Specifically, when the control device 50 selects the maintenance mode, the power supply voltage V is within a set voltage range a × E to b × E (a and b are predetermined coefficients, E is a rated voltage of the AC power supply, and is, for example, 200V ) Is included in the voltage determination unit 54. The temperature determination unit 52 has a function of determining whether or not the internal temperature tmp when the maintenance mode is selected is lower than a reference temperature tref (for example, 40 ° C.).

  When the voltage determination unit 54 determines that the power supply voltage V is within the set voltage range, and the temperature determination unit 52 determines that the internal temperature tmp is lower than the reference temperature tref, the drive control unit 51 Execution of maintenance mode is allowed. On the other hand, if either the power supply voltage V is outside the set voltage range or the internal temperature tmp is equal to or higher than the reference temperature tref, the drive control unit 51 disallows execution of the maintenance mode. Prevent maintenance mode from being executed. As described above, when the power supply voltage V and the internal temperature tmp do not satisfy the above-described predetermined conditions, the pass / fail judgment is made by disabling the execution of the maintenance mode, thereby varying the conditions at the start of the maintenance mode. It is possible to suppress deterioration in accuracy.

  The display control unit 55 controls the content of the display screen displayed on the display unit 40 and causes the display unit 40 to display the determination result by the pass / fail determination unit 53. Specifically, when the user operates the operation unit 30 to select the check mode, the display control unit 55 can start the check mode according to the determination results of the temperature determination unit 52 and the voltage determination unit 54 described above. Is displayed on the display unit 40.

  FIG. 5 is a schematic diagram illustrating an example of a display unit that displays whether or not the check mode can be started in the display control unit of FIG. 3. As illustrated in FIG. 5, when it is determined that the check mode can be started based on the determination results of the temperature determination unit 52 and the voltage determination unit 54, the display control unit 55 indicates the internal temperature tmp. “GLL-TH: 30” and “VOLT: 200V” indicating the power supply voltage are displayed. On the other hand, when it is determined that the check mode cannot be started based on the determination results of the temperature determination unit 52 and the voltage determination unit 54, a message indicating that it is not permitted is displayed.

  For example, when the power supply voltage V is higher than the specified voltage range, the display control unit 55 displays “VOLT: HIGH” on the display unit 40, and when the power supply voltage V is lower than the specified voltage range, the display unit 40 displays “VOLT”. : LOW ”is displayed. Further, when the internal temperature tmp is equal to or higher than the reference temperature tref, “GRL-TH: HIGH” is displayed on the display unit 40. Thus, when the start of the check mode is not permitted, the user can grasp which part is abnormal by displaying which parameter is abnormal.

  3 is in a state in which the check mode can be started, and when the user operates the operation unit 30 to start the check mode, the state when the check mode is executed is sequentially displayed on the display unit 40. To display. FIG. 6 is a schematic diagram illustrating an example of screen transition displayed on the display unit under the control of the display control unit in FIG. 3. As shown in FIG. 6A, the display control unit 55 displays “TIME:” indicating the elapsed time TI when the check mode of the heating chamber 10 is executable (see FIG. 5A). “GRL-TH: 30” indicating the internal temperature tmp, “VOLT: 200 V” indicating the power supply voltage, and “GRL:” indicating the pass / fail judgment result are displayed on the display unit 40.

  When the user selects the start of the check mode via the operation unit 30, as shown in FIG. 6B, the display control unit 55 displays the elapsed time TI on “TIME:”, and displays “GRL The internal temperature tmp is sequentially displayed at “−TH: 30”. After that, when the pass / fail judgment by the pass / fail judgment unit 53 is finished, as shown in FIGS. 6C to 6E, the display control unit 55 sets the pass / fail judgment result to “GRL: OK” or “GRL: NG”. "Is displayed.

  Further, the control device 50 of FIG. 3 includes a history storage unit 56a that stores a history of determination results in the pass / fail determination unit 53, and the display control unit 55 displays a determination result stored in the history storage unit 56a. Have The pass / fail determination unit 53 stores the pass / fail determination result in the history storage unit 56a, and the history storage unit 56a stores past pass / fail determination results for a predetermined number of times (for example, 10 times). The display control unit 55 calls the determination result history stored in the history storage unit 56 a and causes the display unit 40 to display the determination result history. FIG. 7 is a schematic diagram illustrating an example of a display unit on which a history of determination results is displayed by the display control unit of FIG. As illustrated in FIG. 7, when the user operates the operation unit 30, the display control unit 55 displays the determination result history while switching the display according to the operation of the operation unit 30. Thereby, the user can grasp | ascertain the tendency etc. of the failure of the heating cooker 1 by browsing a log | history.

  Further, the control device 50 includes a comment storage unit 56b in which the determination result in the pass / fail determination unit 53 and the comment content of the determination result are stored in association with each other. Then, the display control unit 55 causes the display unit 40 to alternately display the description contents stored in the description storage unit 56 b together with the determination result in the pass / fail determination unit 53. FIG. 8 is a schematic diagram showing an example of the display unit on which the explanation content is displayed by the display control unit of FIG. As shown in FIG. 8, in the comment storage unit 56b, comment contents in the case of OK determination, comment contents when the elapsed time TI is smaller than the lower limit value Tc of the set time range, and NG determination. The commentary contents when the elapsed time TI is larger than the upper limit value Td of the set time range are stored. Then, the display control unit 55 acquires the commentary content to be displayed from the comment storage unit 56b based on the determination result of the pass / fail determination unit 53, and causes the display unit 40 to alternately display the determination result and the use in the commentary. Thereby, the user can grasp the specific contents of the determination result when the execution of the check mode is completed.

  FIG. 9 is a flowchart illustrating an operation example in the maintenance mode by the control device in FIG. 3, and an operation example in the maintenance mode of the cooking device will be described with reference to FIGS. 1 to 9. First, the operation unit 30 is operated by the user, and the check mode is selected. Then, the internal temperature tmp is detected by the temperature detection unit 61, and it is determined by the temperature determination unit 52 whether or not the internal temperature tmp is lower than the reference temperature tref (step ST1).

  For example, when the internal temperature tmp is equal to or higher than the reference temperature tref immediately after using the heating chamber 10 (NO in step ST1), the display unit 40 displays that the internal temperature tmp is high (see step ST2, FIG. 5). ). If the user performs an operation for starting the check mode in this state (step ST3), it is determined that the start of the check mode is not permitted (step ST4), and the check mode by the drive control unit 51 and the pass / fail judgment unit 53 is Not executed. Until the internal temperature tmp becomes lower than the reference temperature tref, the start of the check mode is not permitted (step ST1 to step ST4).

  If the internal temperature tmp is lower than the reference temperature tref (YES in step ST1), the internal temperature tmp is displayed on the display unit 40 (see step ST5, FIG. 5). Thereafter, it is determined whether or not the power supply voltage V is within a set voltage range (a × E to b × E) (step ST6). When the power supply voltage V is out of the set voltage range (NO in step ST6), the display unit 40 displays that the power supply voltage V is high or low (see steps ST7 to ST9, FIG. 5). ). Even when the user performs an operation for starting the check mode in this state (step ST110), the check mode by the drive control unit 51 and the pass / fail judgment unit 53 is not valid until the power supply voltage V falls within a predetermined range. It becomes a permission state (step ST1-step ST11). In FIG. 9, the case where the determination of the power supply voltage V is performed after the determination of the internal temperature tmp is illustrated, but the determination of the internal temperature tmp is performed after the determination of the power supply voltage V is performed. It may be performed.

  On the other hand, when the internal temperature tmp is lower than the reference temperature tref and the power supply voltage V is within the set voltage range (YES in step ST6), the check mode can be executed, and the display unit 40 is turned on. The voltage V is displayed (see step ST12, FIG. 6A). When the start of the check mode is input from the operation unit 30 by the operation of the user (YES in step ST13), the check mode is started (step ST14). At this time, heating in the heating chamber 10 by the heating unit 20 is started, and measurement of the elapsed time TI is started in the pass / fail determination unit 53. Further, the display unit 40 displays an elapsed time TI from the start of the check mode (see FIG. 6B).

  Thereafter, when the elapsed time TI has elapsed for the initial heating period T1 (YES in step ST15), the internal temperature tmp = t1 when the heating chamber 10 is heated for the initial heating period T1 is stored (step ST16). Then, it is determined whether the internal temperature tmp has become equal to or higher than the determination start temperature t3 (step ST17), or whether the internal temperature tmp has reached the internal temperature t1 + Δt (step ST18). Heating is continued until the internal temperature tmp reaches the set temperature (determination start temperature t3 or temperature t1 + Δt) (steps ST17 and ST18).

  Whether or not the elapsed time TI is within the set time range Tc to Td when the internal temperature tmp reaches the set temperature (determination start temperature t3 or temperature t1 + Δt) (YES in step ST17 or YES in step ST18) Is determined (step ST19). When the elapsed time TI is within the set time range Tc to Td (YES in step ST19), a display indicating normality is output on the display unit 40 (see step ST20, FIG. 6C). On the other hand, when the elapsed time TI is shorter than the lower limit value Tc of the place setting time range or longer than the upper limit value Td of the place setting time range (NO in step ST19), an indication that there is an abnormality is output on the display unit 40. (See step ST21, FIGS. 6D and 6E).

  According to the first embodiment, whether or not the heating chamber 10 is operating normally is determined based on the elapsed time TI from the start of heating until the internal temperature tmp reaches the set temperature until the set temperature is reached. By determining, it is possible to confirm whether the problem is caused by an abnormality on the device side of the heating cooker 1 or a problem caused by the user's usage, and the quality of the heating chamber 10 is determined efficiently. It can be carried out. That is, when it is determined that the heating chamber 10 is normal in the maintenance mode when the user is complaining about the malfunction of the heating chamber 10, it can be determined that the heating chamber 10 is caused by how the user uses it. On the other hand, when it is determined that the heating chamber 10 is abnormal in the maintenance mode, it can be determined that the heating chamber 10 is caused by an abnormality in the equipment such as the heating unit 20 or the temperature detection unit 61.

  In addition, as shown in FIG. 4, when the pass / fail determination unit 53 sets a temperature obtained by adding the set temperature increase Δt to the internal temperature tmp = t1 after the initial heating period T1 has elapsed from the start of heating, as the set temperature. Even if there is a variation in temperature due to individual differences in the heating cooker 1, it is possible to make a quality determination based on the internal temperature tmp with high accuracy. Further, by determining whether the amount of increase in the internal temperature tmp is too small or too large, the cause of the rough abnormality can be specified. At this time, the control device 50 further includes a power frequency detection unit 63 that detects the power frequency f of the AC power source that drives the heating unit 20, and the temperature determination unit 52 increases the set temperature that varies depending on the power frequency f of the AC power source. When setting the amount Δt, it is possible to accurately determine whether the convection fan 22b has a different output due to a difference in the power supply frequency f.

  Moreover, the determination start temperature t3 is set as the set temperature in the temperature determination unit 52, and when the temperature determination unit 52 determines whether or not the internal temperature tmp has reached the determination start temperature t3, for example, exhaust An abnormal rise in the internal temperature tmp such as when the mouth or the intake port is blocked can be detected, and the cause of the abnormality can be specified as well as the pass / fail judgment.

  In addition, although the temperature determination part 52 illustrated about the case where it determines whether the chamber | room temperature tmp reached | attained the determination start temperature t3 after progress of the elapsed time TI, determination start temperature T3 before progress of the elapsed time TI. It may be determined that an abnormality is reached and the driving of the heating unit 20 is stopped.

  Furthermore, as shown in FIG. 7, when the display control unit 55 has a function of displaying the determination result stored in the history storage unit 56 a, the user can input an operation button (not shown) of the operation unit 30. It is possible to confirm what kind of trouble has occurred in the past. Further, as shown in FIG. 8, when the display control unit 55 causes the display unit 40 to alternately display the description contents stored in the description storage unit 56b together with the determination result in the pass / fail determination unit 53, based on the determination result. It is possible to identify the location where an abnormality has occurred.

Embodiment 2. FIG.
FIG. 10 is a block diagram illustrating an example of a control device for a heating cooker according to Embodiment 2 of the present invention, and the control device 150 will be described with reference to FIG. 10. In the control device 150 of FIG. 10, parts having the same configuration as that of the control device 50 of FIG. The control device 150 in FIG. 10 is different from the control device 50 in FIG. 3 in that the check mode is executed even when the power supply voltage is not within the set voltage range.

  In the control device 150 of FIG. 10, the pass / fail judgment unit 153 has a time setting table 153a in which the set voltage range is stored in association with the value of the power supply voltage V. The pass / fail determination unit 153 performs pass / fail determination by changing the determination threshold according to the value of the power supply voltage V. FIG. 11 is a schematic diagram showing an example of the time setting table in FIG. As shown in FIG. 11, when the power supply voltage V is smaller than the lower limit values a × E to b × E of the set voltage range, the set time range is set to Ta to Tb. When the power supply voltage V is within the set voltage range (a × E to b × E), the set time range is set to Tc to Td. When the power supply voltage V is larger than the upper limit value b × E of the set voltage range, the permitted time range is set between Te and Tf. Here, since the amount of heating per unit time by the heating unit 20 decreases as the power supply voltage V decreases, the set time range described above is set to increase as the power supply voltage V decreases (for example, Ta> Tc>). Te and Tb> Td> Tf).

  FIG. 12 is a flowchart showing an operation example in the maintenance mode by the control device in FIG. 10, and an operation example in the check mode will be described with reference to FIGS. First, the operation unit 30 is operated by the user, and the check mode is selected. Then, the power supply voltage detection unit 62 detects the power supply voltage V and displays it on the display unit 40 (step ST31). Next, the internal temperature tmp is detected by the temperature detection unit 61, and it is determined by the temperature determination unit 52 whether or not the internal temperature tmp is lower than the reference temperature tref (step ST32).

  If the internal temperature tmp is equal to or higher than the reference temperature tref (NO in step ST32), the display unit 40 displays that the internal temperature tmp is high (see step ST33, FIG. 5). If the user performs an operation to start the check mode in this state (YES in step ST34), it is determined that the start of the check mode is not permitted (step ST35), and the check by the drive control unit 51 and the pass / fail determination unit 53 is performed. The mode is not executed. Until the internal temperature tmp becomes lower than the reference temperature tref, the start of the check mode is not permitted (step ST31 to step ST35).

  When the internal temperature tmp is lower than the reference temperature tref (YES in step ST32), the check mode can be executed, and the internal temperature tmp is displayed on the display unit 40 (step ST36). When the start of the check mode is operated by the user (YES in step ST37), the check mode is started (step ST38). At this time, heating in the heating chamber 10 by the heating unit 20 is started, and measurement of the elapsed time TI is started in the pass / fail determination unit 53. Further, the display unit 40 displays an elapsed time TI from the start of the check mode (see FIG. 6B). Thereafter, when the elapsed time TI has elapsed for the initial heating period T1 (YES in step ST39), the internal temperature tmp = t1 when the heating chamber 10 is heated for the initial heating period T1 is stored (step ST40).

  Thereafter, it is determined whether or not the power supply voltage V is within a set voltage range (a × E to b × E) (step ST41). When the power supply voltage V is within the set voltage range (YES in step ST41), the pass / fail judgment unit 153 reads the set time ranges Tc to Td from the time setting table 153a. Then, it is determined whether the internal temperature tmp has become equal to or higher than the determination start temperature t3 (step ST42), or whether the internal temperature tmp has reached the internal temperature t1 + Δt (step ST43). Heating is continued until the internal temperature tmp reaches the set temperature (t3 or t1 + Δt) (steps ST42 and ST43).

  When the internal temperature tmp reaches the set temperature (t3 or t1 + Δt) (YES in step ST42 or YES in step ST43), it is determined whether or not the elapsed time TI is within the set time range Tc to Td. (Step ST44). When the elapsed time TI is within the set time range Tc to Td (YES in step ST44), a display indicating normality is output on the display unit 40 (step ST45). On the other hand, when the elapsed time TI is shorter than the lower limit value Tc of the place setting time range or longer than the upper limit value Td of the place setting time range (NO in step ST44), a display indicating that there is an abnormality is output on the display unit 40. (Step ST46).

  On the other hand, when the power supply voltage V is out of the set voltage range (NO in step ST41), it is determined whether or not the power supply voltage V is larger than the upper limit value b × E of the set voltage range (step ST47). When the power supply voltage V is larger than the upper limit value b × E of the set voltage range (YES in step ST47), the pass / fail judgment unit 153 reads the set time ranges Te to Tf from the time setting table 153a. Then, it is determined whether the internal temperature tmp has become equal to or higher than the determination start temperature t3 (step ST48), or whether the internal temperature tmp has reached the internal temperature t1 + Δt (step ST49). Heating is continued until the internal temperature tmp reaches the set temperature (t3 or t1 + Δt) (steps ST48 and ST49).

  When the internal temperature tmp reaches the set temperature (t3 or t1 + Δt) (YES in step ST48 or YES in step ST49), it is determined whether or not the elapsed time TI is within the set time range Te to Tf. (Step ST50). When the elapsed time TI is within the set time range Te to Tf (YES in step ST50), a display indicating normality is output on the display unit 40 (step ST51). On the other hand, if the elapsed time TI is shorter than the lower limit value Te of the set time range or longer than the upper limit value Tf of the set time range (NO in step ST50), an indication that the display unit 40 is abnormal is output. (Step ST52).

  When the power supply voltage V is smaller than the upper limit value b × E of the set voltage range (NO in step ST47), that is, when the power supply voltage V is smaller than the lower limit value a × E of the set voltage range, the pass / fail judgment unit 153 The set time ranges Ta to Tb are read from the time setting table 153a. Then, it is determined whether the internal temperature tmp has become equal to or higher than the determination start temperature t3 (step ST53), or whether the internal temperature tmp has reached the internal temperature t1 + Δt (step ST54). Heating is continued until the internal temperature tmp reaches the set temperature (t3 or t1 + Δt) (steps ST53 and ST54).

  When the internal temperature tmp reaches the set temperature (t3 or t1 + Δt) (YES in step ST53 or YES in step ST54), it is determined whether or not the elapsed time TI is within the set time range Ta to Tb. (Step ST55). When the elapsed time TI is within the set time range Ta to Tb (YES in step ST55), a display indicating normality is output on the display unit 40 (step ST56). On the other hand, if the elapsed time TI is shorter than the lower limit value Ta of the set time range or longer than the upper limit value Tb of the set time range (NO in step ST55), an indication that the display unit 40 is abnormal is output. (Step ST57).

  According to the second embodiment, the pass / fail determination unit 153 selects the set time range from the time setting table 153a based on the power supply voltage V detected by the power supply voltage detection unit 62 when the maintenance mode is executed, and the selected setting is performed. Even if the power supply voltage V is outside the set voltage range by determining whether the heating chamber 10 is operating normally using the time ranges Ta to Tb, Tc to Td, or Te to Tf, The quality of the heating chamber 10 can be determined. Further, even in the case of the second embodiment, the quality of the heating chamber 10 can be determined efficiently without taking time and effort as in the first embodiment.

Embodiment 3 FIG.
FIG. 13 is a block diagram illustrating an example of a control device for a heating cooker according to Embodiment 3 of the present invention, and the control device 250 will be described with reference to FIG. 13. In the control device 250 of FIG. 13, parts having the same configuration as the control device 150 of FIG. 10 are denoted by the same reference numerals and description thereof is omitted. The control device 250 of FIG. 13 is different from the control device 150 of FIG. 10 in that the drive control unit 251 corrects the setting during normal heating according to the power supply voltage V.

  In FIG. 13, the drive control unit 251 controls the operation of the heating unit 20 during a normal operation for heating an object to be heated in the heating chamber 10. The drive control unit 251 has a drive table 251a in which a preset cooking time or a preset energization rate is stored in advance for each cooking mode, and controls the operation of the heating unit 20 according to the cooking mode. And the drive control part 251 has a function which correct | amends the cooking time or energization rate of cooking mode according to the power supply voltage V of AC power supply. When the power supply voltage V is smaller than the lower limit value a × E of the set voltage range, the output of the heating unit 20 is lowered, so that the color of the object to be heated tends to become light overall. When the power supply voltage V is larger than the upper limit value b × E of the set voltage range, the output of the heating unit 20 is increased, so that the color of the object to be heated tends to be dark overall. Therefore, the drive control unit 251 corrects the cooking time or the energization rate when the power supply voltage V is outside the set voltage range, and the output of the heating unit 20 is almost the same as when the power supply voltage V is within the set voltage range. Correct so that the output is equivalent.

  FIG. 14 is a schematic diagram illustrating an example of display on the display unit when the cooking time is corrected in the drive table of the drive control unit in FIG. 13. As shown in FIG. 14, the display unit 40 can select from three types of “LOW”, “NORMAL”, and “HIGH” as the cooking time correction degree. When “LOW” is selected, the cooking mode setting cooking time × α1 (α1> 1) is set, and the cooking time is corrected to be longer than the setting cooking time. When “NORMAL” is selected, the cooking mode is executed with the set cooking time set in the drive table 251a without performing correction. When “HIGH” is selected, the cooking mode cooking time × α2 (α2 <1) is set, and the cooking time is corrected to be shorter than the set cooking time.

  FIG. 15 is a schematic diagram illustrating an example of display on the display unit when the power supply rate is corrected in the drive table of the drive control unit in FIG. 13. As shown in FIG. 15, the display unit 40 can be selected from three types of “LOW”, “NORMAL”, and “HIGH” as the degree of correction of the energization rate. When “LOW” is selected, the cooking mode setting energization rate × β1 (β1> 1) is set, and the cooking energization rate is corrected to be higher than the set energization rate. When “NORMAL” is selected, the cooking mode is executed according to the set energization rate set in the drive table 251a without performing correction. When “HIGH” is selected, the set energization rate of cooking mode × β2 (β2 <1) is set, and the energization rate is corrected to be lower than the set energization rate.

  According to the third embodiment, the set cooking time or the set energization rate of the cooking mode stored in the drive table 251a can be corrected according to the determination result of the power supply voltage V, and the power supply voltage V varies. Even if it is a case, the influence which it has on heat cooking can be suppressed. Further, even in the case of the third embodiment, the quality of the heating chamber 10 can be determined efficiently without taking time and effort as in the first embodiment.

  The embodiment of the heating cooker of the present invention is not limited to the above-described embodiment, and various modifications can be made as follows, for example, without departing from the gist of the present invention. For example, although the heating cooker of the said embodiment has shown what heats a cooking appliance by electromagnetic induction, this invention is not limited to this, For example, an electric heater, a gas burner, etc. may be sufficient. . Moreover, the heating cooker 1 may not have a heating coil on the top surface but may have a heating chamber.

  Furthermore, although the case where the heating unit 20 has the heater 21 and the hot air supply part 22 is illustrated, it is not limited to this, For example, you may have a lower heater heated with radiant heat, and a heater 21 or only the lower heater may be used, or only the hot air supply unit 22 may be provided.

  1 Heating cooker, 2 Cooker body, 2a Intake port, 2b Supply port, 2c Intake duct, 2d Exhaust duct, 2x Discharge port, 3 Top plate, 4 Induction heating coil, 4a Installation position indicator, 10 Heating chamber, 11 Grill Door, 12 tray, 13 shelf network, 20 heating unit, 21 heater, 22 hot air supply unit, 22a housing, 22b convection fan, 22c motor, 22d convection heater, 30 operation unit, 30a top operation unit, 30b front operation unit, 40 Display unit, 50, 150, 250 control device, 51, 251 drive control unit, 52 temperature determination unit, 53, 153 pass / fail determination unit, 54 voltage determination unit, 55 display control unit, 56a history storage unit, 56b comment storage unit, 61 temperature detector, 62 power supply voltage detector, 63 power supply frequency detector, 53a Time setting table, 251a Drive table, a, b coefficient, f power frequency, T1 initial heating period, t3 determination start temperature, Ta to Tb, Tc to Td, Te to Tf set time range, TI elapsed time, tmp Inside the chamber Temperature, tref reference temperature, V power supply voltage, Δt Set temperature rise.

Claims (14)

A cooker body having a heating chamber in which an object to be heated is accommodated;
A heating unit for heating the object to be heated housed in the heating chamber;
A temperature detection unit for detecting the temperature in the heating chamber as an internal temperature;
A control device that executes a maintenance mode for determining whether or not heating in the heating chamber can be normally performed based on the internal temperature detected in the temperature detection unit;
A display unit for displaying a state of the heating chamber when a maintenance mode is executed in the control device;
The controller is
A drive controller that starts driving the heating unit at the start of the maintenance mode;
When the heating unit heats the heating chamber under the control of the drive control unit, a temperature determination unit that determines whether the internal temperature has reached a set temperature,
Whether or not the state of the heating chamber is normal based on the elapsed time from the start of heating to the set temperature when it is determined in the temperature determination unit that the internal temperature has reached the set temperature. A pass / fail judgment unit for judging,
A cooking device comprising: a display control unit configured to display a determination result by the quality determination unit on the display unit.   The pass / fail determination unit determines that the heating chamber is operating normally when the elapsed time is within a set time range, and abnormally determines the heating chamber when the elapsed time is outside the set time range. The cooking device according to claim 1, wherein it is determined that occurrence has occurred.   The heating cooker according to claim 1 or 2, wherein the temperature determination unit sets, as the set temperature, a temperature obtained by adding a set temperature increase amount to an internal temperature after an initial heating period has elapsed from the start of heating. A power frequency detector for detecting a frequency of an AC power source for driving the heating unit;
The cooking device according to claim 3, wherein the temperature determination unit sets the set temperature increase amount that differs according to the frequency of the AC power supply.   The cooking device according to any one of claims 1 to 4, wherein a determination start temperature that is a heating limit temperature is set as the set temperature in the temperature determination unit.   The cooking device according to claim 5, wherein the drive control unit stops driving the heating unit when the internal temperature reaches the determination start temperature. A power supply voltage detection unit that detects a power supply voltage of an AC power supply that drives the heating unit;
The control device further includes a voltage determination unit that determines whether or not the power supply voltage detected by the power supply voltage detection unit when the maintenance mode is selected is within a set voltage range;
The temperature determination unit has a function of determining whether the internal temperature at the time of selecting the maintenance mode is lower than a reference temperature,
The heating according to any one of claims 2 to 6, wherein the drive control unit permits execution of the maintenance mode when the power supply voltage is within a set voltage range and the internal temperature is lower than the reference temperature. Cooking device. A power supply voltage detection unit that detects a power supply voltage of an AC power supply that drives the heating unit;
The controller is
A time setting table in which the set time range is associated and stored for each different power supply voltage;
The pass / fail determination unit sets the set time range based on the power supply voltage detected by the power supply voltage detection unit during the maintenance mode and the time setting table, and whether the heating chamber is operating normally or not. The cooking device according to any one of claims 2 to 6, wherein the cooking device is for determining whether or not.   The drive control unit controls the operation of the heating unit during a normal operation of heating the object to be heated in the heating chamber, and operates the heating unit according to a cooking mode in which a cooking time is set in advance. The heating cooker according to claim 8, which has a function of controlling and corrects the cooking time according to a power supply voltage of an AC power supply.   The said drive control part controls the operation | movement of the said heating unit at the time of normal operation | movement which heats the said to-be-heated object in the said heating chamber, Comprising: The electricity supply rate is correct | amended according to the power supply voltage of AC power supply. Or the heating cooker of 9.   The cooking device according to any one of claims 1 to 10, wherein the heating unit includes a hot air supply unit that circulates hot air in the heating chamber to heat the object to be heated.   The cooking device according to any one of claims 1 to 11, wherein the heating unit includes a heater that radiates heat to the object to be heated to heat the object to be heated. The control device has a comment storage unit in which the determination result in the pass / fail determination unit and the comment content of the determination result are stored in association with each other,
The said display control part displays the description content memorize | stored in the said comment memory | storage part alternately on the said display part with the determination result in the said quality determination part, The any one of Claims 1-12 Cooking cooker. The control device includes a history storage unit that stores a determination result in the pass / fail determination unit,
The cooking device according to any one of claims 1 to 13, wherein the display control unit has a function of displaying a determination result stored in the history storage unit.

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