JP2011169478A - High frequency heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow an infrared temperature sensor to control a heating time to shorten a thawing time. <P>SOLUTION: A controller 4 starts a heater 2 that is a radiation heater simultaneously with the initiation of the infrared temperature sensor 3a, thus allowing the infrared temperature sensor 3a to control a heating time, and consequently shortening a thawing time. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to thawing key control of a high-frequency heating apparatus provided with radiant heating means.

  Conventionally, this type of heating device detects the temperature of food heated by high-frequency heating means with an infrared temperature sensor, and estimates the amount and state of the food using the detected temperature, The heating time is calculated.

  In addition, when combining not only high-frequency heating means but also radiant heating means, there is concern that the food temperature cannot be accurately acquired by radiant heating, and the infrared rays emitted from the food are routed to the infrared temperature sensor along the openings and openings. A switch that opens and closes the part, and closes the switch during radiation heating to protect the infrared temperature sensor from the heat of the atmosphere, or high-frequency heating means while detecting the food temperature with the infrared temperature sensor at the beginning of cooking There are some which are heated only and switched to radiation heating means when a predetermined temperature is reached (for example, see Patent Document 1).

  FIG. 3 shows a conventional high-frequency heating device described in Patent Document 1. As shown in FIG. As shown in FIG. 3, a cooking chamber 1 for storing food, high-frequency heating means 2 for high-frequency heating food in the cooking chamber, radiant heating means 3 for radiant heating of food in the cooking chamber 1, and cooking chamber 1 An infrared temperature sensor 4 for thermoelectrically converting the amount of infrared rays emitted from the food in the food, and an opening portion 5 and an opening / closing portion for opening and closing the opening portion 5 in the path where the infrared rays emitted from the food item to the cooking chamber 1 reach the infrared sensor 4 6.

JP-A-7-63345

  However, in the conventional configuration, there is a problem that a space and cost for attaching the opening / closing part 6 are required.

  In addition, when trying to obtain a time shortening effect by adding the radiant heating means 3 during thawing, the radiant heating time per 300 g of sliced meat (thickness 2 to 3 cm) requires about 5 minutes when the internal volume is 30L. Yes, because the heating time when thawing with only the high-frequency heating means 2 is about 6 minutes, even if it is heated only with the high-frequency heating means 2 and then switched to the radiant heating means 3, the time reduction effect is not obtained. Become. In order to obtain a time shortening effect, it is conceivable to add the radiant heating means 3 after starting the heating with the high-frequency heating means 2, but the food temperature is the same until the radiant heating is added and after the addition. However, since the detection temperature of the infrared temperature sensor 4 is different, the amount of food and the estimation of the state based on the detection temperature are complicated, and errors are likely to occur.

  The present invention solves the above-mentioned conventional problems, and by driving the radiation heating means simultaneously with the start of driving the infrared temperature sensor, it is possible to control the heating time with the infrared temperature sensor and to shorten the thawing time. With the goal.

In order to solve the conventional problems, a high-frequency heating device according to the present invention includes a cooking chamber for storing food, high-frequency heating means for high-frequency heating the food in the cooking chamber, and radiation for heating the food in the cooking chamber. A heating means, an infrared temperature sensor for thermoelectrically converting the amount of infrared radiation emitted from the food in the cooking chamber, and a heating controller for controlling driving of the high-frequency heating means and the radiation heating means by an output from the infrared temperature sensor. The heating controller is characterized in that the radiant heating means is driven simultaneously with the start of driving of the infrared temperature sensor.

  As a result, the heating time can be controlled by the infrared temperature sensor, and the thawing time can be shortened.

  The high-frequency heating device of the present invention can control the heating time with the infrared temperature sensor by shortening the thawing time by driving the radiation heating means simultaneously with the start of driving of the infrared temperature sensor.

Configuration diagram of a high-frequency heating device in Embodiment 1 of the present invention The flowchart which shows the control content of the high frequency heating apparatus in Embodiment 2 of this invention. Configuration diagram of a conventional high-frequency heating device

  According to a first aspect of the present invention, there is provided a cooking chamber for storing food, high-frequency heating means for high-frequency heating the food in the cooking chamber, radiant heating means for radiant heating of the food in the cooking chamber, and food in the cooking chamber. An infrared temperature sensor for thermoelectrically converting the amount of infrared rays to be heated, and a heating controller for controlling driving of the high-frequency heating means and the radiant heating means according to an output from the infrared temperature sensor. By driving the radiant heating means simultaneously with the start of driving, the heating time can be controlled by the infrared temperature sensor, and the thawing time can be shortened.

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

(Embodiment 1)
FIG. 1 is an external configuration diagram of a high-frequency heating device according to a first embodiment of the present invention. In FIG. 1, reference numeral 7 denotes an object to be heated such as food, which is placed in the heating chamber 1. A magnetron 6 (high-frequency heating means) that generates a high-frequency electromagnetic wave is coupled to the heating chamber 1 via a waveguide 9 to supply power. The magnetron 6 changes the output by an inverter 5 connected to the control means 4 (heating controller).

  The heater 2 which is a radiant heating means is provided in the upper part of the heating chamber 1, and the control means 4 controls ON / OFF and time.

  In the upper part of the machine room 10, an infrared sensor 3a (infrared temperature sensor) which is a temperature detecting means is provided. The infrared sensor 3a has eight detection elements, and these detection elements are in a state where the amount of infrared rays on the surface in the heating chamber 1 or the object to be heated 7 is placed through holes provided in the wall surface. Then, the amount of infrared rays on the surface of the object 7 to be heated is detected, and the detected signal is input to the control means 4. The infrared sensor 3a is configured in combination with the driving means 3b, and when the object to be heated 7 is placed at the center of the salauque die 8 while being swing-driven at a constant speed, the surface of the area to be heated 7 is necessary. The temperature can be detected. The signals detected by these infrared sensors 3a are input to the control means 4.

  The operation section also includes a “warm” key and “drink” key for automatic heating control, a “finish adjustment” key for selecting the finish state, and a “range” and “oven” for performing heating based on the user's intention. Heating pattern selection section, "heating time input section", "heating temperature input section", display section that displays the temperature of the object to be heated and the remaining cooking time, "start" key to input heating start, and input It has a “Cancel” key that can be used to cancel conditions or interrupt heating.

  The operation and action of the high-frequency heating apparatus configured as described above will be described below with reference to FIG.

  First, after the user places the heated object 7 such as beef sliced meat taken out of the freezer in the heating chamber 1, the user selects the “thawing” key on the operation unit, and if necessary, finishes it. Change and set the adjustment to your liking (S101). At this time, if the “finish adjustment” is not changed, a preset finish adjustment is set. Next, depressing is started by pressing a “start” key (S102).

  When heating by the heater 2 which is a radiant heating means starts (S104), the control means 4 takes in the detection signal of the infrared sensor 3a (S105). The eight detection elements of the infrared sensor 3a are taken in by the driving means 3b at intervals of 0.35 seconds while swinging, and if it is carried out 19 times, the data (152 points) of the entire surface of the heating room 1 is just taken. (This is called one scan). Since the driving means 3b swings regularly and reciprocates, the swinging operation is repeated so that the nineteen capture positions are the same. Of the 152 points of the first scan, a point lower than a preset temperature (referred to as the freezing discrimination temperature) is set as a food point (S106).

  Heating with a high-frequency heating device is also performed at the same time, and the amount of the object to be heated is estimated based on the time (S107) when the average temperature of the food point has reached a preset determination temperature (this is called the detection temperature), The subsequent heating time is calculated (S108).

  For the refrigeration discrimination temperature and detection temperature, select the optimum temperature based on experiments and experience.

  As described above, in the present embodiment, the heating time can be controlled by the infrared temperature sensor 3a by driving the heater 2 which is a radiant heating means simultaneously with the start of driving of the infrared sensor 3a, and the thawing time can be controlled. It can be shortened.

  In the present embodiment, the case where the heating by the high-frequency heating device is performed simultaneously with the heating by the radiant heating unit has been described, but the heating start timing by the high-frequency heating device is not limited.

  Further, the number of elements of the infrared sensor 3a is not limited to eight, and an optimal number of elements may be selected depending on the size of the interior.

  As described above, the high-frequency heating device according to the present invention enables the heating time to be controlled by the infrared temperature sensor by driving the radiant heating means simultaneously with the start of the driving of the infrared temperature sensor, and shortens the thawing time. Can do.

1 Heating chamber 2 Heater (radiant heating means)
3a Infrared sensor (Infrared temperature sensor)
3b Driving means 4 Control means (heating controller)
5 Inverter 6 Magnetron (high frequency heating means)
7 Object to be heated 8 Salauquet die 9 Waveguide 10 Machine room

Claims (1)

Thermoelectric conversion of a cooking chamber for storing food, high-frequency heating means for high-frequency heating the food in the cooking chamber, radiant heating means for radiant heating of the food in the cooking chamber, and the amount of infrared radiation emitted from the food in the cooking chamber An infrared temperature sensor, and a heating controller that controls driving of the high-frequency heating means and the radiant heating means based on an output from the infrared temperature sensor, the heating controller radiating heating simultaneously with the start of driving of the infrared temperature sensor A high-frequency heating apparatus characterized by driving means.

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