JPH0272584A - Heater - Google Patents

Abstract

PURPOSE:To shorten thawing time by providing a heating means, a far infrared ray generating means, and a power supply instruction means, and radiating not only high frequency power but also far infrared ray to a means to be heated during thawing period. CONSTITUTION:A thawing means 1 which intermittently applies high frequency power to a heating chamber 2 for a heating time according to the weighted value of a substance 10 to be heated being put in the heating chamber 2, a far infrared ray generating means 3 which radiates far infrared ray to the heating chamber 2 when heated, and a heating means 4 which heats this far infrared ray generating means 3 are provided. And by controlling the current application to the heating means 4 by means of a current instruction means 6 the substance 10 to be heated is thawed by high frequency power and far infrared ray. Also, for the timing that the power supply instruction means 6 applies current to the heating means 4, proper timing during a thaw period is available, but the hand of heat insulating current application is preferable in points of power efficiency. Hereby, thawing time of freezed food can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heating device for automatically defrosting frozen foods.

This type of heating device disclosed in conventional technical patent No. 57-80693 and the like is configured as follows. That is, the weight of the frozen food to be thawed is weighed and the frozen food is thawed by being intermittently irradiated with only high-frequency power over a heating time corresponding to II.

Problems to be Solved by the Invention In such a conventional configuration, during the time when high-frequency heating is stopped, the amount of heat stored on the food surface is simply waiting for it to penetrate into the inside of the food. If the food is not homogeneous, it is difficult for the heat on the surface to be transmitted evenly to the inside of the food, so it takes a long time to thaw and heat the food, which causes the problem of locally accelerated thawing, resulting in boiled parts of the food. Was.

SUMMARY OF THE INVENTION An object of the present invention is to provide a heating device that can uniformly heat the inside of a food product and shorten the thawing and heating time.

Means for Solving the Problems The heating device of the present invention performs a defrosting operation by intermittently irradiating the heating chamber with high-frequency power over a heating time corresponding to the weighed value of the object to be heated placed in the heating chamber. The heating chamber is provided with a far-infrared generating means that emits far-infrared rays when heated, and a heating means that warms the far-infrared a generating means, and a power supply command means controls energization to the heating means to generate high-frequency waves. Thaws the object to be heated using electric power and far infrared rays.

Further, the timing at which the power feeding command means energizes the heating means can be set at an appropriate timing during the thawing period, but it is effective to energize the heating means during a period when irradiation with high frequency power is stopped.

Function: With this configuration, not only high frequency power but also far infrared rays generated from the far infrared ray generating means act on the object to be heated, and the far infrared rays heat the object from within, promoting uniform heating. . Furthermore, even if the heating means is energized only when the high-frequency power is stopped, far-infrared rays are continuously generated from the warmed far-infrared ray generating means.

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 to 4.

FIG. 1 shows a heating 5iA setting according to the present invention. magnetron 1
The heating chamber 2, which is irradiated with high-frequency power, is provided with a far-infrared ray generating means WA3 as a far-infrared ray generating means and a heater 4 as a heating means. The power supply to this heater 4 is controlled by 1i! It is managed by the power supply command means 6 of fl$5. The operation panel 7 has a heating time display, a select key 8 for selecting the type of heating to be performed, an operation control key for starting and stopping heating, and a setting knob for setting the time and weight. Be prepared for such things.

A control signal corresponding to the operation on the operation panel 7 is sent to the control unit 5.
can be conveyed to. The weight of the object to be heated 10 placed on the mounting plate 9 of the heating chamber 2 is detected by the weight sensor 11, converted into a signal by the detection circuit 12, and then transmitted to the control section 5. The pay plate 9 is driven by a motor 13. Air sent by a blower fan 14 that cools the magnetron 1 and other electrical components enters the heating chamber 2 through a hole 15 provided in the wall of the heating chamber 2, and is mixed with water vapor and gas coming out of the object to be heated 10. Together, they are exhausted to the outside of the aircraft via the exhaust guide 16. A gas sensor 17 provided in the exhaust guide 16 detects the state of water vapor and gas contained in the exhausted air and the temperature of the air, and sends a signal to the control unit 5 via the detection circuit 12. The magnetron 1 and the heater 4 are energized by controlling the operation of the driver 18 using a control signal from the control section 5.

The select key 8 is equipped with a key for instructing to defrost the frozen food. Place the object to be heated 10 on the tray 9 of the heating chamber 2, press the select key 8 to select and specify thawing/heating, and start heating. After closing the chamber M19, the heating start instruction key is operated to start defrosting and heating. The heating start signal is sent to the control unit 5.
When the notification is received, the IJaO section 5 checks and determines whether thawing and heating is specified or not.
When thawing and heating is designated, a signal for controlling the operation of the driver 18 is output from the control unit 5 in accordance with the thawing and heating control sequence.

How the defrosting and heating control sequence is performed.
A description will be given based on the time relationship between the time Fm elapsed, the temperature of the object to be heated, the high frequency output, and the heater heating output shown in FIG. 2, and the flowchart of the heating control sequence shown in FIG. 3.

First, the object to be heated 10 to be thawed is placed on the mounting plate 9 of the heating chamber 2, and the heating chamber 1yl! 19 is closed and the key for designating defrosting/heating among the select keys 8 is pressed. When the heating start key instructing the start of heating is pressed in [step a], it is then determined in [step b] whether or not the defrosting and heating sequence has been selected. If the defrost/heat sequence is selected,
Step C] is executed. In [Step C], the weight of the object to be heated is read through the weight sensor 11, and depending on this weight, the time T1. T2, T3, T4, T5.

To *Shining out. Next, in [step d], high frequency heating is performed at high frequency output P1 until time T1.

In (step e), the stop detection means 20 determines that the high-frequency heating has stopped, and if the heating has stopped, then in [step f] T2. During the time t21. t+2
．． t23 and each. and [step q
], when the passage of 12 hours of heater heating is detected, high-frequency heating is performed at high-frequency output P3 for the next time T3 in [step h]. After 13 hours have elapsed, when the stop detection means 20 detects that the high-frequency heating has stopped in (step i), 1 in (step j).
Intermittent energization of the heater 4 for 4 hours according to the power supply command means 6 t41. t42°t43. t44 and each. In (step k), it is determined whether 14 hours have passed or not, and if T4 has passed, high-frequency heating is performed at high-frequency output P5 for the next time (5) in [step λ]. In [step m], it is determined whether the cumulative heating time has reached To or not, and if it has reached To (step n), the heating is stopped.

With such a configuration and heating sequence, the heater 4 is energized while the high-frequency heating is stopped, so that the far-infrared generating film 3 heated by the heater 4 is not heated by the heater 4. Because the residual heat is stored, far-infrared rays continue to be emitted. Therefore, the object to be heated 1
High-frequency heating is performed on the surface of the 0, and far-infrared heating is performed on the inside, so that the thawing and heating time of the frozen food can be shortened compared to when high-frequency heating is used alone.

Note that the high frequency outputs Pz and P3 shown here.

P5 and intermittent energization time t2tt22 of heater 4,
t23, t41, t42, t43.

Although t4+ is a constant set in advance, the same effect can be obtained by using a value determined based on the weight of the heated object to be thawed.

Next, another embodiment of the present invention will be described using FIG. 4. The difference in FIG. 4 from the previous embodiment is that the high frequency output is switched by intermittent heating with a constant output, so that the average high frequency output within a certain period of time changes. Moreover, when the high frequency output is intermittent and the high frequency output is made small in this way, the heater 4 is energized during the time when the high frequency output is stopped. By completely synchronizing the intermittent high-frequency output and the intermittent heating of the heater, the interior and surface of the object to be heated are heated at approximately the same time, which has the effect of shortening the thawing time of frozen foods. There is.

In addition, in FIG. 4, t31. t32. t33°t34. t35
, tit , t42. t43°t44. t51. 2. Although the value of ts3 is a predetermined constant, the effect of shortening the thawing time is the same even if it is a calculated value based on the weight of the heated object to be thawed.

In each of the above embodiments, the energization of the heater 4 was intermittent during the thawing period, but the same effect can be obtained even if the heater 4 is energized continuously. but,
Intermittent energization is preferable in terms of power efficiency.

Effects of the Invention As described above, according to the present invention, a heating means, a far-infrared ray generating means, and a power supply commanding means are provided so that not only high-frequency power but also far-infrared rays are radiated to the object to be heated during the thawing period. , the object to be heated can be heated evenly from the inside by the action of far infrared rays, and compared to conventional heating equipment that uses only high-frequency power, heating efficiency is improved and thawing time can be shortened. You can get the decompression result.

Furthermore, even if the power supply command means is configured to energize the heating means during the period when high-frequency power irradiation is stopped, far-infrared rays are continuously generated from the far-infrared ray generating means due to the stored heat, resulting in a saving. It can be converted into electric power, and it is possible to obtain the same decompression result as when continuous electricity is applied.

[Brief explanation of the drawing]

Fig. 1 is a block configuration diagram of the heating device of the present invention, Fig. 2 is an elapsed time characteristic diagram showing the heating control sequence of the device, Fig. 3 is a flowchart showing the heating control sequence of the device, and Fig. 4 is a diagram showing the heating control sequence of the device. FIG. 7 is an elapsed time characteristic diagram showing a heating control sequence as another example. DESCRIPTION OF SYMBOLS 1... Magnetron, 2... Heating chamber, 3... Far-infrared generating film (far-infrared a generating means), 4... Heater [heating means], 5... Control unit, 6...・Power supply command means, 1
0... Heated object, 11... Weight sensor. Agent Yoshihiro MorimotoFigure 2Figure 3

Claims (1)

[Scope of Claims] 1. The heating chamber is intermittently irradiated with high-frequency power for a heating time corresponding to the weighed value of the object to be heated placed in the heating chamber to perform a thawing operation. , further comprising a far-infrared ray generating means that emits far-infrared rays when heated, and a heating means that warms the far-infrared ray generating means, and a power supply command means that energizes the heating means during a thawing period in which thawing operations are repeated. Heating device provided. 2. The heating device according to claim 1, wherein the power supply command means is configured to energize the heating means during a period when irradiation of high-frequency power is stopped.