JP4273883B2 - High frequency heating device - Google Patents

Description

  The present invention relates to a high-frequency heating apparatus that heats and cooks an object to be heated with high frequency and steam.

  Conventionally, a high-frequency heating apparatus provided with high-frequency generating means for outputting a high frequency in a heating chamber that accommodates an object to be heated can efficiently heat the object to be heated in the heating chamber in a short time. It rapidly spread as a microwave oven as a cooking device.

  However, there are inconveniences such as a limited cooking range only by heating by high frequency heating.

Therefore, a high-frequency heating device has been proposed in which an electric heater that generates heat in the heating chamber is added to enable oven heating. In recent years, a steam supply mechanism that supplies steam to the heating chamber has been added, and heating by steam is performed. There has been proposed a high-frequency cooking device with a steam generation function that enables cooking (see, for example, Patent Document 1).
JP 54-115448 A

  However, in the conventional configuration, it has been proposed to perform the steam heating operation or the electrothermal heating operation after operating the high frequency heating, or operate the high frequency heating after performing the steam heating operation or the electrothermal heating operation, Since a cooking mode for performing a steam heating operation and an electrothermal heating operation has not been proposed, the steam temperature exceeds 100 ° C. and has not yet become invisible. In general, high-frequency cooking devices (microwave ovens) do not raise the temperature in the cabinet, and even when combined with electric heating, most of them are air, and even when heated, they have little energy to hold. There is almost no fear of burns even if opened. In particular, there is a recognition that a microwave oven is safe because it has a mechanism that stops high frequency generation in advance even if the door is opened during operation. However, if a cooking mode for generating a large amount of steam in the cabinet and electrically heating the steam is installed, the conventional recognition is overturned, so that improvement in safety is desired.

The present invention has been made in view of the above-described problems, and the purpose thereof is to realize rapid steam cooking by performing optimum steam temperature control according to the object to be heated, and to use it. An object of the present invention is to provide a high-frequency heating device that can be used safely even if a person uses it incorrectly.

In order to solve the conventional problem, the high-frequency heating cooking apparatus of the present invention includes a display unit that provides notification by display and a notification unit that notifies by sound, and the temperature in the heating chamber is a predetermined value Ta. In this case , the notification sound of the notification unit is different between a state where the user touches the opening / closing means and a state where the opening / closing means is slightly opened .

Thereby, the user can recognize the state of the internal temperature. That is, when operating the opening / closing means when taking out the object to be heated from the heating chamber, it is possible to recognize the danger of being burned by high-temperature steam.
In particular, when the user touches the opening / closing means, the notification sound of the notification section in a state where the user touches the opening / closing means is slightly different from that in the state where the opening / closing means is slightly opened. A horn can be sent when operated. In addition, it is possible to reliably attract the user's attention by sounding the sound in two stages (the first time is voice notification and the second time is a warning sound).

The high-frequency cooking device is easy to use because the high-frequency generator stops when the door is opened or closed even during the heating operation. Without impairing this usability, if the risk of burns can be grasped when opening and closing means is opened, accidents such as burns can be prevented. In addition, it can be enlightened that hot steam is dangerous.
In particular, the notification sound of the notification unit is changed to two or more different notifications, for example, by changing the notification sound with the user touching the opening / closing means or with the opening / closing means slightly opened, It becomes possible to notify the danger.

According to a first aspect of the present invention, there is provided a high frequency generating means for outputting a high frequency into a heating chamber that accommodates an object to be heated, a steam supply means for supplying steam into the heating chamber, a heating means for raising the temperature of the heating chamber, A forced circulation fan for stirring, an opening / closing means for taking in and out the object to be heated, a temperature detecting means for detecting the temperature in the heating chamber, and an informing means for informing the user of the operation of the opening / closing means by notifying with a display and sound. The notification means has a display section for notification by display and a notification section for notification by sound, and when the temperature in the heating chamber is equal to or higher than a predetermined value Ta , the user touches the opening / closing means and By operating the notification means so that the notification sound of the notification unit in a state where the opening / closing means is slightly opened, the user is informed of the risk of burns by the notification means, and the user can operate the opening / closing means. In contrast, the opening and closing means It is possible to confirm the safety with respect to forming operation, it is possible to prevent the accident.

According to the second aspect of the present invention, a user who feels that notification by sound or voice is unnecessary is not used according to his / her preference because the sound volume of the notification unit can be variably set from large to mute. It is also possible to do. Further, since the volume of the sound can be varied, the sound level can be adjusted according to the use environment, and both accident prevention and safety can be ensured.

A third invention is provided with a time setting function, within a set time range by which enables mute the notification unit may be set according to the time zone of the life scenes. In other words, the user's preference can be reflected by muting at night and notifying the voice in the morning or daytime.

According to a fourth aspect of the present invention, there is provided an automatic locking mechanism for the opening / closing means that closes the opening / closing means when the temperature in the heating chamber reaches a predetermined value Ta or higher, so that the user can erroneously operate the opening / closing means. Can be reliably prevented. Therefore, accidents such as burns can be surely prevented even if a new function using high-temperature steam is used.

The fifth aspect of the invention recognizes that the operation of the apparatus is unsafe because the lock mechanism is forcibly released and opened by manual operation even when the temperature in the heating chamber is equal to or higher than the predetermined value Ta. On the other hand, food can be taken in and out, and safety can be ensured without impairing usability.

According to a sixth aspect of the present invention, when the opening / closing means is opened, the forced circulation means is forcibly stopped, so that hot air containing steam in the warehouse or hot water attached to the inner wall surface of the warehouse is formed when the opening / closing means is operated. It will not jump out of the opening. Therefore, accidents caused by scattering of hot air or hot water droplets can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic view of the high-frequency cooking device according to the first embodiment of the present invention, and FIG. 2 is a schematic view of the heating chamber as viewed from the front with the open / close door of the heating chamber of the device being opened. The block diagram is shown.

  1 and 2, the high-frequency heating device 1 according to this embodiment is used as a steam microwave oven capable of high-frequency heating and heating by heating steam, hot air, and heat radiation for cooking food. High-frequency generating means 2 that outputs a high frequency into a heating chamber 3 that accommodates an object to be heated, a steam supply mechanism 4 that supplies heating steam into the heating chamber 3, a flat heater 5 that generates radiant heat, and a sheathed heater 6 And a circulation fan 7 that stirs the atmosphere in the heating chamber 3, and supplies at least one of high frequency, steam, high-temperature steam, radiant heat, and hot air to the heating chamber 3 to be heated in the heating chamber 3. Heat treatment.

The heating chamber 3 is formed inside a box-shaped main body case 8 that is open on the front surface, and an opening / closing means (open / close) with a translucent window 9 a that opens and closes a heated object outlet of the heating chamber 3 on the front surface of the main body case 8. Door) 9 is provided. The open / close door 9 can be opened / closed in the vertical direction by the lower end being hinged to the lower edge of the main body case 8 , and the open / close door 9 is opened by grasping the handle 9 b provided on the upper part and pulling it forward. Can be.

A predetermined heat insulating space is secured between the wall surfaces of the heating chamber 3 and the main body case 8, and a heat insulating material is loaded in the space as necessary.

  In particular, the space behind the heating chamber 3 is a circulation fan chamber (not shown) that houses a circulation fan 7 that stirs the atmosphere in the heating chamber 3 and its drive motor (not shown). This wall is a partition wall 10 that defines the heating chamber 3 and the circulation fan chamber.

  Although not shown, the partition wall 10, which is the rear wall of the heating chamber 3, has an intake vent hole for intake air from the heating chamber 3 side to the circulation fan chamber side, and the circulation fan chamber side to the heating chamber 3 side. A ventilation vent for blowing air is provided separately from the formation area. Each ventilation hole is formed as a large number of punch holes.

  In addition, a flat heater 5 formed of a heating element insulated with mica is provided on the upper surface of the heating chamber 3, and an internal thermistor 11 is disposed at the top corner of the heating chamber 3 at the tip thereof in the heating chamber 3. It is attached to protrude.

  The detection signal of the internal thermistor 11 is monitored by a control circuit (not shown), and operation control of the flat heater 5, sheathed heater 6, and circulation fan 7 (overtemperature prevention control, heat generation control, rotational speed control, etc.) is performed. Used for

  In addition, the opening / closing door 9 has a display lamp 12a and a speaker 12b for notifying the degree of danger against burns that can be determined from the temperature in the heating chamber 3 and the amount of water vapor, a speaker 12b, and a notification means 12 having a control circuit (not shown). 9b is provided with a human body sensor 9c that detects contact of the human body.

  The open / close door 9 is provided with an operation SW group, one of which is provided with a SW that can be unlocked.

As shown in FIG. 2, the high frequency generating means 2 has a magnetron 2a disposed in a space below the heating chamber 3, and a stirrer blade 2b is provided at a position for receiving the high frequency generated from the magnetron 2a. ing. Then, a high frequency from an antenna (not shown), by irradiating the stirrer vane 2b which rotates, and supplies while 攪拌high frequency into the heating chamber 3 by stirrer blades 2b. The magnetron 2 a and the stirrer blade 2 b can be provided not only on the bottom of the heating chamber 3 but also on the upper surface or side surface of the heating chamber 3.

As shown in FIG. 2 , the steam supply mechanism 4 includes a water storage tank 4 a that is detachably mounted on the high-frequency generator 1, a water supply tray 4 b that is mounted in the heating chamber 3, and these water supply trays 4 b. An aluminum die cast heater 4c that evaporates the water on the water supply tray 4b by heating and a water supply path 4e that guides the water in the water storage tank 4a to the water supply tray 4b by a pump 4d.

  In the present embodiment, the water storage tank 4a is a flat rectangular parallelepiped cartridge that is easy to handle, can be easily attached to and detached from the high-frequency heating cooking apparatus 1, and is heated by heating in the heating chamber 3. It is inserted and attached to a tank storage unit (not shown) assembled on the side surface so that it is not easily damaged.

  As shown in FIG. 2, the aluminum die cast heater 4c is attached in close contact with the lower surface of the water supply tray 4b, and the bottom surface of the aluminum die cast heater 4c detects the temperature of the aluminum die cast heater 4c. (Not shown) are equipped in an embedded state. The detection signal of the thermistor 4f is monitored by a control circuit (not shown) and is used for operation control (temperature rise prevention control and heat generation amount control), respectively.

As shown in FIG. 3, the opening / closing door 9 and the main body case 8 are provided with a lock mechanism 13 that prevents the opening / closing door 9 from being opened according to the temperature in the heating chamber 3, and is connected to the actuator 13a and the actuator. It comprises a shaft 13b, a protrusion 13d having a hole 13c into which the shaft 13b can be inserted, and a control circuit (not shown).

  Next, the state when the sheathed heater 6 and the circulation fan 7 are simultaneously operated while generating steam using the steam generating means 4 will be described.

  When the aluminum die cast heater 4c is operated in a state where the water storage tank 4a is inserted into the tank housing portion, the embedded sheathed heater generates heat, and the aluminum die cast is heated by the heat, and the water supply tray 4b is opened from the back side. Heated. At this time, when the thermistor 4f reaches a predetermined detected temperature level, the water supply pump 4d operates for a predetermined time, whereby a predetermined amount of water is supplied dropwise from a water supply port (not shown) to the water supply tray 4b. Since the water supply tray 4b is heated, the supplied water is immediately heated and vaporized. Basically, a large amount of steam is continuously generated by continuously operating the aluminum die cast heater 4c and intermittently operating the water pump 4d at a predetermined timing.

  At the same time, when the circulation fan 7 is operated while energizing the sheathed heater 6, the atmosphere in the heating chamber 3 is warmed to a high temperature and is also heated by the steam generated in the heating chamber 3.

  At this time, if the atmospheric temperature of the heating chamber 3 is detected by the internal thermistor 11 and the temperature in the heating chamber 3 becomes equal to or higher than the predetermined value Ta, the display lamp 12a is turned on or flashes, and the heating chamber 3 is heated to the user. Notify that it is.

  At the same time as this notification, an actuator serving as a lock mechanism works, and the shaft 13b is inserted into the through hole 13c of the projection 13d provided in the door 9 so that the door 9 cannot be opened. Further, a human body sensor 9c for detecting the contact condition is attached to the handle 9b, and when the handle 9b is touched, a sound is generated from the speaker 12b to notify that it is dangerous. This lock mechanism is released when the heating chamber temperature is less than the set value or when cooking is completed.

However, the temperature in the cooking ends straight in the heating chamber after 3 because there may not have been below the predetermined value Ta, the notification means is operated continuously until the predetermined value or less Ta. If the heating chamber 3 is to be taken out when the set value Ta is equal to or higher than the set value Ta, the display lamp 12a and the speaker 12b alert the user to high temperature. In particular, when the user opens the door 9 after touching the handle 9b, the sound generated from the speaker 12b changes, and further alerts.

  On the other hand, if you want to temporarily stop the sound, such as when using at night, the time setting SW 14b can be set in order to prevent the sound from being emitted only during the time zone with a predetermined characteristic by the notification means release SW 14c. The sound can be turned off by setting the operation.

  In addition, an object to be heated may be taken out or added during cooking or immediately after the start. At this time, when the lock mechanism 13 is working, the lock temporary release SW can be operated to release the lock. When the door 9 is closed and the device is restarted, it is automatically re-locked.

  From the above, when the inside of the heating chamber 3 is filled with high-temperature steam, the condensation (cloudiness) of the light-transmitting window 9a is eliminated, and the heating chamber 3 is heated to a high temperature without generating steam. However, the notification means 12 and the lock mechanism 13 can be used safely while recognizing the degree of danger.

  In addition, cooking and other combinations using both steam and high frequency are similar in operation and action of the notification means 12 and the lock mechanism 13 except for the operating parts, and the description is omitted.

  Moreover, in this Embodiment, although it was set as the atmospheric temperature in the heating chamber 3 also in a different cooking sequence, the threshold value of the chamber thermistor 11 is changed and set according to cooking by steam generation amount, cooking time, and cooking content. It is also possible.

  As described above, the high-frequency heating cooking apparatus according to the present invention can be used while recognizing that the temperature is high by adding the function of steam or high-temperature steam. It can also be applied to uses such as sterilizers and dryers using sapphire.

The figure which shows the high frequency heating cooking apparatus in the 1st Embodiment of this invention Schematic configuration diagram when the heating chamber is viewed from the front with the open / close door of the heating chamber of the apparatus according to Embodiment 1 of the present invention open. 1 is a schematic configuration diagram of a lock mechanism according to Embodiment 1 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High frequency heating device 2 High frequency generating means 2a Magnetron 2b Stirrer blade 3 Heating chamber 4 Steam supply mechanism 4a Water storage tank 4b Water supply tray 4c Aluminum die-cast heater 4d Water supply pump 4e Water supply path 5 Flat heater 6 Sheath heater 7 Circulating fan 8 Main body case 9 Opening and closing door 9a Translucent window 9b Handle 9c Human body sensor 10 Partition wall 11 Temperature detection means (inside thermistor)
12 Notification means 12a Indicator lamp 12b Speaker 13 Lock mechanism 13a Actuator 13b Shaft 13c Through hole 13d Projection body 14 Operation SW
14a Temporary unlock SW
14b Time setting SW
14c Notification means release SW

Claims (6)

A high frequency generating means for outputting a high frequency into a heating chamber that accommodates an object to be heated, a steam supply means for supplying steam into the heating chamber, a heating means for raising the temperature of the heating chamber, and the air in the heating chamber are stirred. A forced circulation fan, an opening / closing means for taking in and out the object to be heated, a temperature detecting means for detecting the temperature in the heating chamber, and an informing means for informing the user of the operation of the opening / closing means by giving a display and sound. The notification means has a display section for notification by display and a notification section for notification by sound, and when the temperature in the heating chamber is equal to or higher than a predetermined value Ta , the user touches the opening / closing means and A high-frequency heating apparatus in which the notification sound of the notification unit in a state where the opening / closing means is slightly opened is different . The high-frequency heating device according to claim 1, wherein the sound volume of the notification unit can be variably set from large to mute . The high frequency heating device according to claim 1 , further comprising a time setting function, wherein the notification unit can be silenced within a set time range . The high-frequency heating device according to claim 1 , further comprising an automatic locking mechanism for the opening / closing means that closes the opening / closing means when the temperature in the heating chamber reaches a predetermined value Ta or higher . The high-frequency heating device according to claim 4 , wherein the lock mechanism can be released by a manual operation even when the temperature in the heating chamber is equal to or higher than a predetermined value Ta . The high frequency heating device according to any one of claims 1 to 5, wherein the forced circulation fan is stopped when the opening / closing means is opened .

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