JPS58121761A - Food drying apparatus - Google Patents

Abstract

PURPOSE:To perform the drying of a food, in a short time, by energizing a heater for the heating of the food intermittently, and heating the food with microwave during the intermission period of the heater. CONSTITUTION:The start key of the operation key board 51 is pushed down to start the heating of the food with the heater 20 by energizing the magnetic coils 47c, 48c and 49c via the control circuit, and at the same time, to start the circulation and ventilation of the drying chamber by energizing the motors 19a and 21a and driving the stirrer fan 19b and the ventilation fan 21b. On the other hand, the timer is started to start the count-down of the time, and when the temperature in the chamber detected by the temperature sensor 25 is raised to the upper limit, the coil 49c is demagnetized to cut the heater 20, and the magnetic coil 45c is energized to energize the magnetron 18 and heat the food by microwave. When the temperature in the chamber is lowered to the lower limit, the heater 20 is switched on and the magnetron 18 is switched off. The drying of the food placed on a shelf 26 can be carried out by the procedure at a high temperature maintained within a preset range.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention proposes a food drying device that can shorten drying time.

Conventionally, when drying food using a cooking device such as an oven range that is open or equipped with microwave heating means and a heater, the drying process is carried out by driving the heater to heat the food placed in the drying chamber. was.

However, there is a problem in that the drying KH of foodstuffs performed in this manner requires a long period of time.

The present invention was made with an eye to the fact that microwave heating means can also be used for drying in the case of an open range. Driving the means at low power, further vc
Cooking that greatly reduces the drying time of food by promoting ventilation inside the Fi! For the purpose of providing @, Zero-shot #4 will be described in detail below based on its embodiment.

! FIG. 1 is a schematic front sectional view of a microwave oven according to the present invention (hereinafter referred to as the device of the present invention). V on the right side of the cooking chamber 14
There are 18 I arm dagnetrons and 1 U magnetron.
The microwaves emitted from the microwave enter the cooking chamber 14 through the deep wave tube 19, the top plate 141 of the #coupled chamber 14, and the fan storage space 11142. A stirrer fan 19b is disposed in this space 142 to stir the microwave and circulate the air inside the cooking chamber 14, that is, inside the refrigerator.
It is designed to be rotated by the drive of.

Further, a heater 2o made of a sheathed heater or the like is arranged so as to surround the stirrer fan 19b.

A ventilation hole 145 is opened on the right side jI2 of the cooking chamber 14, and a ventilation fan 21b that is rotated and driven by a KVi motor 21m is installed near the ventilation hole 145. Through the ventilation fan 2
The air coughed from the 1b IC is guided to the duct 21c connected to the ventilation hole 145, and is sent into the continuous room 14 through the ventilation hole 145. An exhaust hole 146 is provided, and the exhaust hole 146 is provided on the left side outer wall through the duct 23. Therefore, the wind that is not sent into the M-chamber 14 is removed from the exhaust hole 146.
, duct 23 and blowout hole 24 before being discharged. Further, a temperature sensor 25 made of a thermistor or the like is disposed in the duct 23 to detect the temperature of the atmosphere in the cooking chamber 14 discharged through the duct 23.

#4 A turntable 15 in the chamber 14 is connected to a motor 16 provided below it so that it can be rotated slowly, and a good product to be dried is placed slightly above the turntable 15. A shelf board 26 made of a microwave-transparent material and formed in a shape that is wrapped in a mesh-like 4A pattern.
However, it is not releasably locked to a locking member 27 that is deliberately attached to the inside of the side wall of the cooking chamber 14.

This is an electrical circuit diagram of the main part of the #9J device from the second light source, and the voltage of the commercial power supply is 300 and the latch switch 31. Door switch 32. A rectifying circuit 34 consisting of a diode bridge is connected through a semiconductor element 33 capable of phase control, and rectification is not performed here, and is also used to supply power to a control circuit 50 consisting of a microcomputer or the like. It is also applied to the primary winding of the step-down transformer 36. The DC positive terminal of the rectifier circuit WII34 is connected to one terminal of the primary winding 36p of the external voltage transformer 36 having a ferrite core and one terminal of the smoothing capacitor 37 via the choke coil 35, and! The DC negative terminal of the current #s34 is connected to the smoothing capacitor 37 and other components via a contact 45 of an electromagnetic relay 45, which will be described later. The other terminal of the primary winding 36p is connected to the collector of a switching transistor 39, and the emitter of the transistor 39 is connected to the other terminal of the smoothing capacitor 37. Semiconductor Shuko 33's song iI! The source 30 side terminal and the trigger terminal are connected to a control path 50, so that the output of the magnetron 18 is adjusted by its interpolation phase control. Also, the pace of transistor 39 is also controlled! ! connected to l path 50;
Intermittent VC4 control axis control signal to external voltage transformer 3
A high voltage with a high frequency wave is obtained in the secondary winding 368 of No. 6. The high-voltage, high-frequency current obtained from the secondary winding 36S is applied to the mag 2 and the tron 18 via a rectifier circuit consisting of a diode 409 and a Shimada capacitor 41.

Further, a monitor switch 46 is connected to a connection point 1111 between the latch switch 31 and the door switch f32 and the other power supply path of the AC 14f switch 30.

Connection point between door switch 32 and Hankyōtai Suko 33 and AC 1
! 11$ Between the other power supply path of 30, motor 1
9a and the normally open contact 47a of the LIjit magnetic relay 47, the motor 21a and the normally open contact 48 of the dynamic magnetic relay 48@
series circuit, normally open contact 4 of heater 20 and electromagnetic relay 49
The series circuits 9a are connected in parallel. xi rele 4
5, 47, 48.49 excitation coils 45c, 47c
, 48c, 49c are predetermined controls of the control circuit 50. ulJ
It is connected to the output pane so that its excitation and demagnetization can be controlled. -, the output terminal of the temperature sensor v25 is connected to a predetermined input terminal of the Yamiho circuit 50, and the data S representing the internal combustion is transmitted to the control circuit w! It will take about 150 manpower.

Is the other 51 controlled by the control circuit 50? This is an operation key for giving instructions.

In addition to functioning as a normal open range, the device *ti of the present invention configured as described above performs the following food drying mode by the control circuit 5o when food drying is instructed using the operation key 51. Perform the operation in the mode. The process will be explained below according to the flowchart shown in FIG.

Fi when the drying mode is instructed by the operation key 51.
(■), heating means, microwave output, internal temperature, stirrer fan 19b, and ventilation fan 21b on/off,
The register that should store data about drying time, etc. clears the flag -H, then confirms that the heating means is a heater and magnetron, and that the microwave output is low (10 when normally used as a microwave oven). %, that is, several tens to 100 W), the upper limit Ta of the internal temperature (e.g., 80°C), the lower @Tb (e.g., 50'C), and turning on the stirrer fan 19b and ventilation fan 21b. Set data such as the drying time in a predetermined register and 7 lags (■). 1 when dry! When the ij operation keys such as it and the start key among the operation keys 51 are operated, control is performed based on the data of the machine and the like. That is, first, the excitation coils 47c, 48c, and 49c'fr are excited, and the state shown in FIG.
Heating is performed by heater 2o as shown in FIG.
9 a, 21 aK tliL.

The stirrer fan 19b and the ventilation fan 21b are driven to circulate hot air and ventilate the inside of the refrigerator. On the other hand, the timer is activated to 1 and the time t is started (■).

;t and as shown in FIG. 4(a), i#l'! When S≧TacI-h is determined by the input from the j-sensor 25 ((6) the excitation coil 49c is demagnetized to turn off the heater 2Of, and the excitation coil 45cfvjh is magnetized and wJ4 (
As shown in c), the magnetron 18 is driven at low output. Output N adjustment cannot be performed by controlling the conduction phase of the semi-isomatic element 33. In addition, in this embodiment, the drive #J of the magnetron 18
is driven intermittently, but it goes without saying that it may be driven continuously. Then, if the internal fM degree is S or S≦Tb (■), start heating the heater again, and magnetron 1
8 no Kaku #IJJ'5r pause.

Repeating this operation, when 1=0 (the alternating drive IFJt of E-Y20 and magnetron 18)
There are cases where t=OC without performing lljl:
Heater 20. Magneto pr/8. Motor 19a.

21m is turned off, and the series of control of the food 11L drying mode is completed.

The food on the shelf board 26 is maintained at a high temperature within a certain range.
'Also, since microwave heating is performed at a low output in a sudden drop,
This will accelerate the drying. In addition, a ventilation fan 2 is installed outside the stirrer fan 19b for circulating hot air to ventilate the inside of the refrigerator.
1b1ft, the moisture inside the refrigerator can be efficiently discharged to the outside of the machine, further shortening the drying time.

Note that the ventilation fan 21b may be driven only when the heater 20 is off.

Next, an example of the effect will be shown. Like a traditional open range,
When drying 200 g of beef using only a heater, it took 6 hours, but when using the device of the present invention in combination with microwave heating (similarly, without using the ventilation fan 21b), the drying time was shortened to 2 hours and 30 minutes. . Of course, if the ventilation 7-an 21b is driven, it can be expected that the time will be shortened even more. By the way, without using microwave heating, heater 20
In the case of drying 100 gf of Japanese cabbage by continuous operation of only the ventilation fan 21tl, it took Fiβ time when the ventilation fan 21tl was not used, but when the ventilation fan 21b was turned on, the time was shortened to 112 hours and 30 minutes.

As described above, the food drying apparatus according to the present invention is an apparatus for drying food in a refrigerator, and is equipped with a heater for heating the food by 11% and a microwave heating means, and the heater is driven intermittently. On the other hand, since the structure is such that the microwave heating means is driven during the period when the heater driver is stopped, food can be dried in a short time.

Although the above explanation is based on the case of an open range, there is no doubt that it can be configured as a dedicated food drying machine.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic front cross-sectional view of the zero firing device, FIG. 2 is a block diagram schematically showing the main electric circuit, etc., and FIG. 70-chart of the previous work, Figures 4 (A) to (C) are graphs for explaining the Fi1 work. 14...1111 Barber room 145...Ventilation hole 146
...Exhaust hole 15...Turntable 18...Macnetron 19...Waveguide 19a...Mo, evening
19b... Star rough fan 20... Heater 22.
...Intake hole 23...Duct 24...Blowout hole 2
5... Temperature sensor 26... Shelf board 34... Rectifier circuit 50... Control circuit 51... Operation key Patent applicant Sanyo Electric Co., Ltd. representative patent attorney Noboru Kono Inubori 1-time procedure Written amendment (voluntary) 1. Display of the case 1982 Patent Application No. 3639 2, Title of the invention Food drying device 3, Person making the amendment Relationship to the case Patent applicant 4, Attorney 6, Number of inventions increased by the amendment 7, Subject of the amendment [Column Detailed Description of the Invention J and Drawing 8, Contents of Amendment 0] In the specification, page 5, line 2, "step-down transformer 36" is changed to "step-down transformer 38" by 1 0 ( 21 Part 6 of the specification, page 6, line 3, ``IvlVc'' and the line 2, ``Also'', and the following sentences are all included. The voltage of the power supply 30 may be boosted by the output/output step-up transformer 36, and the high voltage may be supplied via the half-wave voltage doubler circuit to cause oscillation, and the conduction phase may be damped by the semiconductor element 53. 2 drawings are nailed together as in the attached corrected drawings, list of attached documents + 11, correction direction 1 copy

Claims (1)

[Claims] 1. An apparatus for drying food in a refrigerator, which is equipped with a heater for heating the food and microwave heating means, the heater is driven intermittently, and the heater is driven intermittently while the heater is not driven. A food drying device characterized in that it is configured to drive wave heating means. 2. An apparatus for drying food in a refrigerator, which includes a heater for heating the food, a microwave heating means, a fan for circulating hot air in the refrigerator, and a fan for ventilation in the refrigerator, and the heater is driven intermittently. 1. A food drying apparatus characterized in that the microwave heating means is driven during a period when a heater driver is inactive. 3. The food drying apparatus according to claim 2, wherein the l1fJ storage storage ventilation fan is configured to be driven during the heater drive rest period h11.