JPS6251587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency thawing device for frozen foods, etc., and is particularly intended to improve thawing efficiency and usability.

Conventionally, the dielectric heating thawing method using high frequencies of several MHz or more is well known. Generally, the object to be thawed is sandwiched between two upper and lower electrodes, and a high frequency electric field is applied between them to increase the dielectric strength of the object. It generates heat and thaws due to loss. In addition, when placing an object to be thawed between two electrodes, the higher the high frequency output and the higher the efficiency, the closer the electrodes are to the object to be thawed. You can defrost things quickly. For this reason, generally one of the electrodes is made vertically movable so that it can be moved according to the thickness of the object to be thawed. Therefore, as preparatory operations for performing a thawing operation, it is necessary to open the door and take in and take out the object to be thawed, and to adjust the height of the electrode to match the size of the object to be thawed. In addition, there are methods for performing this adjustment operation, such as interlocking levers from outside the device, or using a drive source such as a motor, but these mechanisms are complex and expensive. Ta.

Therefore, the present invention eliminates these drawbacks and
The purpose is to provide a high-frequency decompressing device that is inexpensive, requires few preparation operations, and has improved usability.One embodiment of the device will be described below with reference to the accompanying drawings. In the figure, a thawing chamber wall 2 constituting a thawing chamber 1 is made of metal, and a lower surface composed of an insulating frame 3 and a mounting plate 4 is fixed to the lower surface of the thawing chamber wall 2. Reference numeral 5 denotes an object to be thawed, and there are an upper electrode 6 and a lower electrode 7 sandwiching it, and the lower electrode 7 is connected to the mounting plate 4,
The upper electrode 6 is connected to an insulating cover 8. or,
Insulator sliders 9 are installed at both ends of the upper electrode 6.
is fixed, and insulation frames 3,
It is engaged with a slide rod 10 fixed at 3' and is movable up and down. Further, a support fitting 11 is fixed to the slider 9, and the support fitting 11 is fixed to the slider 9.
The entire upper electrode 6 is supported at the center thereof, and is connected to a connecting member 13 such as a string connected to a door 12 through which the object 5 to be thawed is taken in and taken out. The upper electrode 6 is configured to rise when the door 13 is opened and to fall when the door 13 is closed. Further, this connecting member 13 is connected to a hinge 19 fixed to the door 12 via pulleys 14 to 18. Also pulley 1
8 is attached to a movable plate 20, and the movable plate 20 is always tensioned by a spring 21. Also, 22
is the oscillation circuit section for emitting high frequencies, and the fan 23
It is cooled by Further, 24 and 25 are power supply lines for supplying high frequency voltage to the electrodes 6 and 7 above and below the oscillation circuit section 22, and the oscillation circuit section 22 and the power supply line 25 are shielded by a conductive metal casing 26. ing. Further, 27 is an exterior, 28 is a control unit such as a relay, and 29 is an operation unit such as a power switch.

Next, the operation of this embodiment will be explained. First, with the door 12 closed in the thawing device, the thawing chamber 1
If there is no object to be thawed 5 inside, the upper electrode 6
is closest to the lower electrode 7, and door 1
2 is fully opened, the connecting member 13 is pulled,
The upper electrode 6 is in the highest position. Then, when the object 5 to be thawed is put in and the door is closed, the upper electrode 6 lowers and comes into contact with the object 5 to be thawed. When the door 12 is further closed and completely tightened, the connecting member 13 begins to loosen, but since the loosening is pulled by the spring 21 provided on the pulley 18, it does not sag and there is no fear of it coming off the pulley 18. Further, since the electrode 6 stops when it comes into contact with the object 5 to be thawed, when thawing is performed, it can be thawed with the highest output, and the effort of adjusting the interval between the electrodes 6 and 7 is eliminated. Further, when the door 12 is opened when thawing is completed, the electrodes 6 and 7 go up, making it very easy to take out the object 5 to be thawed.

As described above, according to the present invention, there is no need to move the electrode up and down each time when the object to be thawed is put in and taken out, and the electrode is set in the state where power is applied most efficiently to the object of any size. , the overall work efficiency is improved, and since the structure itself is very simple, the cost is also low.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a high-frequency decompressing device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. DESCRIPTION OF SYMBOLS 1... Thawing chamber, 4... Placing plate, 5... Object to be thawed, 6... Upper electrode, 9... Slider, 10...
...Slide rod, 12...Door, 13...Connection member,
14, 15, 16, 17, 18...Pulley, 22
...Oscillation circuit section, 27...Exterior.

Claims (1)

[Scope of Claims] 1. A thawing chamber that stores an object to be thawed, two upper and lower electrodes configured to sandwich an object to be thawed, an oscillation circuit section that generates a high-frequency electric field between the electrodes, and a thawing chamber that stores an object to be thawed. A door for taking in and out the thawed material, the upper electrode is movable in the vertical direction, and
A high frequency thawing device connected to the door by a connecting member and linked to opening and closing of the door. 2. The high-frequency thawing device according to claim 1, wherein a pulley for applying tension is provided in the middle of the connecting member. 3. The high-frequency thawing device according to claim 1, wherein the upper electrode has a slider at its end slidably engaged with a slide rod provided on the wall of the thawing chamber via an insulator.