JPH0132895B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a high-frequency heating device that can automatically set the cooking time when thawing frozen food using high-frequency waves. [Technical background of the invention and its problems] Recently, frozen foods have become rapidly popular, and the number of times the frozen foods are thawed before being cooked is also extremely large. High-frequency heating is most suitable for defrosting frozen foods, but setting the cooking time is extremely difficult and is usually done by referring to cooking books or relying on intuition. However, since there are many types of frozen foods and their weights also vary in size, you can set the desired cooking time and thaw it, then check the thawing condition and set the cooking time again if it is insufficient. Troublesome operations such as unzipping are required. There were also some products that had a correlation between weight and cooking time, but this correlation was only a proportional relationship and was insufficient for the quality of the cooking. [Purpose of the Invention] This invention has been made in view of the above circumstances, and its purpose is to automatically set a cooking time commensurate with the weight of the food to be thawed for each weight category. Furthermore, the present invention aims to provide a high-frequency heating device that can set the output stepwise from strong output to weak output, and can perform good cooking in a short time regardless of the weight of the food to be thawed. [Summary of the invention] A weight sensor is provided in the main body, and when the food to be thawed is placed on the weight sensor, the output signal from the weight sensor is processed and the cooking time is determined according to the weight of the food to be thawed. The reason is that the settings can be set for each weight category, and the output can be changed. [Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a main body of a high-frequency heating device, and an operation panel 2 is provided on the front surface of the main body 1.
The operation panel 2 is provided with a display section 3 and a keyboard panel 4, and a part of the keyboard panel 4 is provided with a connection socket 5. A weight sensor 6 detects the weight of the food 7 to be thawed, and is connected to the connection socket 5 via a jack 9 provided at the tip of the cord 8. On the other hand, in FIG. 2, numeral 10 is a microcomputer which is a main control section and is built into the main body 1. This microcomputer 10 is
It consists of an arithmetic circuit 11, a memory 13, etc., and a display section 3 and a keyboard panel 4 are connected to the arithmetic circuit 11, a weight sensor 6 is connected via an A/D conversion circuit 13, and a power control circuit 14 is connected. It is connected. The power control circuit 14 controls the high frequency oscillator 15 in accordance with commands from the arithmetic circuit 11. The memory 12 stores cooking time calculation constants β ₁ , β ₂ , β ₃ , correction additional time t ₀ , and thawing cooking execution time determined in advance according to the weight of the food to be thawed through cooking experiments. Ratio constants α ₁ and α ₂ for dividing into a plurality of regions, a medium power region, and a low power region are stored as fixed data. That is, the memory 12 includes a cooking time calculation constant storage area 12a, a correction additional time storage area 12b,
There is a ratio constant storage area 12c. The arithmetic circuit 11 outputs a high frequency oscillator 15 with high output.
A thawing cooking means that oscillates in stages in the order of low output;
The total cooking time (execution time) T of this thawing cooking is calculated using the cooking time calculation constants β ₁ , β ₂ , β ₃ in the memory 12, the corrected additional time t ₀ and the weight of the food to be thawed detected by the weight sensor 6. Means to calculate and set from ω (T
= β × ω + t ₀ ), from this set total cooking time T and the ratio constants α ₁ and α ₂ in the memory 12, the high output time t ₁ = α ₁ ×T, the medium output time t ₂ =
α ₂ ×T, means for calculating low output time t ₃ =T (1−α ₁ −α ₂ ), high frequency oscillator 1 according to this calculation result;
5 has means for issuing control commands to the controller. In this way, the weight (ω) detected by the weight sensor 6 is converted into the total cooking time T using the relational expression shown in Table 1 and FIG.

[Table] For example, ω ₁ = 400g, ω ₂ = 700g, ω ₃ = 1000
By determining constants such as g, β ₁ = 1.0, β ₂ = 1.1, β ₃ = 1.2, and t ₀ = 30 seconds, the total cooking time T when the weight of the food to be thawed 7 is 500 g is T = β _2ω +t ₀ =1.1×500+30=580 seconds. Normally, when the weight of the food 7 to be thawed increases, the cooking time for thawing must be increased at a higher rate than when the weight is small.
That is, it is necessary to change ΔT/Δω=β to some extent depending on the weight. Therefore, the set weight ω is divided into three categories and β is β ₁ ,
What is necessary is to change it to β ₂ and β ₃ . Note that t ₀ is a correction additional time to enable sufficient thawing even when the weight of the food to be thawed is very small. The operation will be explained with reference to FIG. The weight sensor 6 detects the food 7 to be thawed.
, and press the "Decompress key" on keyboard panel 4.
When turned on, the weight of the food to be thawed 7 is detected and displayed on the display section 3 as, for example, "500 g". Next, when the food to be thawed 7 is placed in the heating chamber and the "cooking start key" is turned on, the microcomputer 10 converts the set weight into the total cooking time. That is, if the weight of the food to be thawed 7 is 500g, the total cooking time T is calculated as T = β ₂ ω + t ₀ = 1.1 × 500 + 30 = 580 seconds, and 580 seconds from the time when the "cooking start key" is turned on. The food to be thawed 7 is heated and thawed. At this time, there are cases where two-stage cooking with high output and low output is performed, and cases where three-stage cooking with high output, medium output, and low output is performed. In the case of two-stage cooking with high output and low output, as shown in Fig. 5, the high output (for example, 500W) is used for α ₁ T time from the start of cooking, and the low output (for example, 500W) is used for the remaining (1−α ₁ )T time from the start of cooking. For example, 200W). For example, if α ₁ = 0.1 and T is 580 seconds, the output will be high for α ₁ T = 0.1 x 580 = 58 seconds from the start of cooking, and the remaining 580 -
Cook at low power for 58 = 522 seconds. For three-stage cooking of high power, medium power, and low power,
As shown in Figure 6, the power is high (for example, 500W) for α ₁ T time from the start of cooking, the medium power (for example, 300W) is used for the next α ₂ T time, and the remaining (1−α ₁ −α ₂ )
For time T, cook at low power (for example, 150W). [Effects of the Invention] As explained above, according to the present invention, when the food to be thawed is placed on the weight sensor, the output signal from the weight sensor is processed and the food is cooked according to the weight of the food to be thawed. Since the time can be automatically set, you can cook well regardless of the weight of the food being thawed, and the thawing output changes from high to low, allowing you to cook in a short time. effective.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a high-frequency heating device showing an embodiment of the present invention, Fig. 2 is a block diagram of an electric circuit in the embodiment, and Fig. 3 is the relationship between weight and cooking time in the embodiment. Graph diagram showing 4th
The figure is a flowchart for explaining the operation of the same embodiment, and FIGS. 5 and 6 are time charts showing output changes during the cooking time in the same embodiment, respectively. 1...Main body, 6...Weight sensor, 7...Food to be thawed, 10 Microcomputer, 11...Arithmetic circuit, 12...Memory.

Claims (1)

[Claims] 1 A high-frequency heating device main body equipped with a high-frequency oscillator, a weight sensor detachably connected to the main body to detect the weight of the food to be thawed, and thawing cooking in which the high-frequency oscillator oscillates in stages in the order of high output and low output. means for storing cooking time calculation constants predetermined according to the weight of the food to be thawed; means for storing correction additional time; means for storing a ratio constant for dividing into a plurality of parts, and means for calculating and setting the execution time of the defrosting cooking from the stored cooking time calculation constant, correction additional time, and output signal of the weight sensor; A high-frequency heating device characterized by comprising means for controlling a high output time and a low output time of the high-frequency oscillator based on the set execution time and the stored ratio constant.