JPS61119922A - Composite heating cooker - Google Patents

Abstract

PURPOSE:To enable to shorten the rise time of a cooker by a method wherein both a grill heater provided at the upper part of a heating chamber and a hot air circulating heater provided outside the heating chamber are simultaneously energized only during the period of time until the temperature in the heating chamber reaches the cooking set temperature. CONSTITUTION:During the hot air circulating mode, an air heater 5 is energized so as to send the heated air in an oven 2 by means of a hot air fan 6 in order to raise the temperature in the oven 2. However, at the rise time of the mode, a grill heater 8 is also energized at the same time. Though the temperature in the oven 2 does not rise before the temperature onto the wall surface in the oven 2 because the hot air flows along the wall surface in the oven 2, the grill heater 8 can directly heat the air in the oven because the grill heater is attached at the upper part in the oven 2, resulting in enabling to shorten the rise time by the time assisted by heating with the grill heater. At the rise time of the combination cooking mode, an electronic range is turned OFF before the temperature in the oven 2 reaches the set temperature, because the input power may be too large if the hot air heater 5, the grill heater 8 and the electronic range are simultaneously turned ON.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to shortening and improving the start-up time of a heating cooking device such as a hot air circulation oven from the start of operation until the cooking temperature reaches a set cooking temperature.

Conventional configuration and its problems Conventional electric heating ovens, especially those with hot air circulation, have a heater and a fan device installed in a partitioned heater chamber outside the heating chamber, and hot air is passed into the heating chamber from here. Since the structure is such that the heater chamber and the walls of the heating chamber are sufficiently heated, the temperature in the center of the chamber will not rise until the set temperature is reached. The shortcoming is that the cooking time is very long.Objective of the InventionThe present invention solves the above-mentioned conventional drawbacks, and aims to provide a hot air circulation heating cooker with improved rise time.

Structure of the Invention In order to achieve the above object, the present invention includes a heating chamber in a main body, a grill heater provided in the upper part of the heating chamber, a hot air circulation heater provided outside the heating chamber, and a hot air circulation fan device. , a control unit that controls the operation of the two heaters and the fan device, etc., and the two heaters are configured to be energized at the same time only until the temperature in the heating chamber reaches the cooking set temperature, and the two heaters are energized at the same time only until the temperature in the heating chamber reaches the cooking set temperature. By energizing two heaters at the same time, the startup time can be reduced.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will now be described based on the drawings.

In FIG. 1, l is a main body, inside which is an oven 2, and 3 is a door that can open and close the front opening of the opener 2.

Reference numeral 4 denotes a hot air chamber provided behind the rear wall of the back wall of the back wall 2, in which a hot air heater 5 and a hot air 7 an 6 are provided. The hot air blower 6 is rotated by a motor 7.

g is a grill heater provided in the upper part of the oven 2.

In Figure 2, the hot air heater and grill heater are connected to relays (and (), respectively, and the hot air fan motor 7 is connected to a relay stone.R1 is used to connect the hot air heater, grill heater, etc. This is a relay for ON/OFF control of the lamp 9 for lighting inside the oven and the turntable motor 10 for rotating the food to be heated.

11 is a 7 motor for cooling electrical parts and is controlled by a relay chain. 1 is a relay for controlling the operation of the microwave oven function, and SW1 and SW are switches that operate in conjunction with the opening and closing of the door 3 to stop the operation of each component when the door 3 is opened. Also, C is a printed circuit board circuit equipped with a microcomputer, and relays R1 to Re
SW2 is a switch that allows the microcomputer to recognize the open/closed state of the door 3. Deaf 4 is a safety switch that short-circuits the power supply circuit when switches SWI and SW2 have a defect such as welding, melting the fuse and making the set inoperable. 4 is a high frequency oscillator operated by a microwave oven motor, and 15, 16 and 17 are a high voltage transformer, a high voltage capacitor and a diode, respectively, for supplying power to the high frequency oscillator. The table below shows the operating status of each relay in each cooking mode, and a circle indicates that the relay is operating.

When the hot air circulation mode and the combination mode start, both the relay tap and R3 are on the same side, indicating that the hot air heater 5 and the grill heater 8 are energized at the same time.

The operation of the above configuration will be explained below.

In the hot air circulation mode, the hot air heater 5 is energized, and the heated air is transferred to the oven 2 by the hot air fan 5.
When the internal temperature reaches the set temperature, the grill heater 3 is also energized at the same time, so the temperature inside the oven 2 increases.
If only the hot air heater 5 is energized at the time of setting, 14 to 1
What takes 5 minutes to rise can be shortened to about 5 to 6 minutes. This is a case where the power consumption of the two heaters is approximately equal, but it can be seen that the effect of shortening the start-up time is greater than simply doubling the power consumption.

The reason for this is that in the case of hot air circulation, the hot air flows along the walls inside the oven 2, so the temperature inside the oven does not rise until the temperature of the walls rises, but the grill heater 8 is attached to the top of the oven. This is because the air inside the refrigerator can be directly warmed, and the start-up time can be accelerated accordingly.

At the start of combination cooking, in which the microwave oven and hot air circulation are turned on at the same time, if the hot air heater 5, grill heater 8, and microwave oven are turned on at the same time, the input power will be too large. The microwave oven is turned off until the temperature reaches the set temperature.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) By energizing the grill heater and hot air heater at the same time only until the temperature inside the oven reaches the set temperature at startup, the startup time can be significantly shortened to less than half of the conventional time.

(2) After startup, turn off the grill heater and maintain the internal temperature using only the hot air heater to save electricity.

(3) When starting up the combination mode in which both the hot air and hot air are activated at the same time, turn off the microwave until the temperature inside the oven reaches the set temperature.
Since the input power is suppressed by setting the unit to F, it can be used without any problem in a normal 200 to 240 inch household outlet.

2) If you continue to turn down the grill heater even after starting up, 2
When cooking on the upper and lower stages simultaneously, an unbalance in heating occurs between the upper and lower stages, but by turning off the grill heater after starting up, simultaneous cooking on the upper and lower stages can be done in a well-balanced manner.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a microwave oven which is an embodiment of the present invention.
FIG. 2 is an electrical circuit diagram of the same, and FIG. 3 is an output waveform diagram showing the operating state of each element in the combination mode. 2...Oven, 4...Hot air chamber, 5.
...Hot air heater, 6...Hot air fan, 8
...Grill heater.

Claims (2)

[Claims] (1) A heating chamber inside the main body, a grill heater provided above the heating chamber, a hot air circulation heater provided outside the heating chamber, and a hot air circulation fan that circulates hot air within the heating chamber. a high-frequency oscillator that supplies high-frequency power into the heating chamber; and a control unit that controls the operations of the two heaters, the high-frequency oscillator, the fan device, etc. A composite heating cooker configured to energize simultaneously or alternately only until the temperature is reached. (2) In the combination cooking mode in which both the high-frequency oscillator and the hot air circulation function operate simultaneously, the high-frequency oscillator is not operated until the temperature inside the heating chamber reaches the set temperature. The composite heating cooker according to item 1.