JPH07222576A - Thawer - Google Patents

Abstract

PURPOSE:To obtain a thawer good in heat transfer efficiency from a thawing plate to frozen foods, thus short in thawing time. CONSTITUTION:This natural thawer has a thawing plate 1 made of plate-like heat transfer material. Plural grooves 12 extending in the specified direction are formed on the surface of this thawing plate 1, and this thawing plate 1 is held by supporting means 2, 3 in such a posture as to be tilted in the above- mentioned direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defroster capable of naturally thawing frozen products such as frozen foods used in ordinary households.

[0002]

2. Description of the Related Art A natural defroster that does not use a power source is, for example,
As disclosed in Japanese Patent Laid-Open No. 63-175545, a plate-shaped thaw plate having a flat surface is used.

Further, as shown in FIG. 3, an aluminum alloy capable of quickly absorbing the cold air of frozen food is used as a heat transfer material, and a plate-shaped thawing plate 81 having a flat surface is provided. Radiator-like heat sink fins 8 on the back
Defroster provided with 2, or heat absorbing fins 82
There is also known a defroster having a concave and convex shape on the back side. In such a defroster, the heat absorbing fins 82
Efficiently absorbs heat in the room and transfers the heat from the surface of the thawing plate 81 to the frozen product 6, whereby natural thawing is performed. In most cases, since the frozen product 6 is not flat in its portion to come into contact with the surface of the thawing plate 81, an air layer is interposed between the portion in contact with the surface of the thawing plate 81 and the thawing plate 81. There is a part. The contacting part is the thawing plate 81 directly.
Heat is transferred from the surface of the, but the part through the air layer is transferred through the air layer.

[0004]

The initial stage of natural thawing is performed as described above, but even with natural thawing, with the passage of time, a little more water than frozen foods, although not as much as thawing in a microwave oven, is used. Elutes. In the above thawing device, the surface of the thawing plate 81 is held flat and horizontal, so that a part of the water 7 eluted from the frozen product 6 is not absorbed by the thawing plate 81 and the frozen product 6 as shown in FIG. The intervening space between them fills up most of the air layer. Thus, when a large amount of water 7 is present between the thawing plate 81 and the frozen product 6, the specific heat c of air is 1.0 (kJ / kg · K), whereas the specific heat c of water is 4 Since it is 0.2 (kJ / kg · K), the thawing plate 8
The heat transfer efficiency from No. 1 becomes poor and it takes time to defrost.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a thawing device which can improve the heat transfer efficiency from a thawing plate to a frozen product and shorten the thawing time.

[0006]

A structure for achieving the above object will be described with reference to FIG. 1 which is an embodiment drawing, and a defroster of the present invention is a thaw made of a plate-shaped heat transfer material. A natural thawing device provided with a plate (1), wherein a plurality of grooves (12) extending in a predetermined direction are formed on the surface of the thawing plate (1), and the thawing plate (1) has a holding means in a posture inclined in the direction of the grooves (12). It is characterized by being held in a few.

[0007]

The water 7 eluted from the frozen material 6 and flowing out to the surface of the thawing plate 1 is collected along the plurality of grooves 12 extending in the predetermined direction on the surface of the thawing plate 1 by the surface tension, and at the same time, the water 7 Most of 7 flows in the direction of inclination of the thawing plate 1 along the groove 12 and is discharged to the outside of the thawing plate 1. As a result, it is possible to maintain a state in which the amount of water 7 present between the surface of the thawing plate 1 and the frozen material 6 is small and the air layer is large even if the time elapses. Heat can be efficiently transferred to the object 6.

[0008]

FIG. 1 is a sectional view showing a decompressor according to an embodiment of the present invention. FIG. 1A is a sectional view of the decompressor shown in FIG. In the cross section shown,
(B) is sectional drawing which cut | disconnects the decompressor shown to (a) in the place corresponding to a BB line, and is shown from the direction of an arrow.

The defroster of this embodiment is mainly composed of a defrosting plate 1, and an upper holding member 2 and a lower holding member 3 for holding the defrosting plate 1 inclined in a predetermined direction. The thawing plate 1 is made of a heat transfer material such as aluminum and has a rectangular plate shape.
A plurality of grooves 12 extending in parallel to a predetermined direction are formed on the surface at predetermined intervals. A plurality of heat-absorbing fins 11 are formed on the back surface so as to project vertically downward from the thawing plate 1 and extend in the same direction as the grooves 12 at a predetermined interval. The thawing plate 1 has an outer peripheral portion sandwiched and held by an upper holding member 2 and a lower holding member 3 in a posture inclined at a predetermined angle in the direction of the groove 12, and the portion other than the held outer peripheral portion is exposed. It is in a state.

Further, the upper holding member 2 has a square annular shape with a hook-shaped cross section, and extends from the upper end of the vertically extending outer peripheral portion to the inner peripheral direction to form the upper edge portion, and An inner peripheral portion is formed by slightly extending downward from the tip of the edge portion. A ridge is provided on the inner edge of the lower end of the outer peripheral portion over the entire circumference.

Each of the inner peripheral portions of the pair of upper holding members 2 facing each other in the inclination direction of the thawing plate 1, that is, in the direction of the groove 12, vertically extends downward from the lower end thereof with a predetermined width. Two pressing portions 22a are provided. These pressing portions 22a are arranged corresponding to the gap portions of the groove 12,
Further, the width of these pressing portions 22a is formed to be equal to the interval between the grooves 12. Furthermore, the vertical lengths of these holding portions 22a are short on the upper side of the inclination and long on the lower side of the inclination, corresponding to the inclination of the thawing plate 1.

Further, each of the inner peripheral portions of the pair of upper holding members 2 formed to face the groove 12 in the vertical direction,
Three pressing portions 22b vertically extending downward from the lower end with a predetermined width are provided. These retainers 22
The vertical length of b corresponds to the angle of inclination of the thawing plate 1, the upper side of the slope is short and becomes longer toward the lower side, and these tips are inclined corresponding to the angle of inclination of the thawing plate 1. It is a shape having. In this way, these presser parts 2
The structure is such that the outer peripheral portion of the thawing plate 1 is pressed down by the 2a and 22b.

A pressing portion 22a on the inner peripheral portion of the upper holding member 2,
In the portion where 22b is not formed, an opening 21 is formed by the lower end of the inner peripheral portion and the surface of the thawing plate 1, and the water on the surface of the thawing plate 1 is transferred to the lower holding member 3 through the opening 21. It has a structure to be discharged inside.

The lower holding member 3 has a square annular shape with a hook-shaped cross section, and extends from the lower end of the vertically extending outer peripheral portion to the inner peripheral direction to form a lower edge portion. It slightly extends upward from the tip to form the inner peripheral portion. A groove is provided on the inner edge of the upper end of the outer peripheral portion over the entire circumference, and this groove is fitted to a ridge on the inner edge of the lower end of the outer peripheral portion of the upper holding member 2.

Each of the inner peripheral portions of the pair of lower holding members 3 facing each other in the inclination direction of the thawing plate 1, that is, in the direction of the groove 12, vertically extends upward from the upper end thereof with a predetermined width. One support portion 32a is provided. These support portions 32a are formed at positions corresponding to the gap portions of the groove 12 and at positions corresponding to the holding portion 22a of the upper holding member 2. The width of these support portions 32a is formed to be exactly equal to the interval between the grooves 12. Furthermore, the lengths of these support portions 32a are long on the upper side of the slope and short on the lower side of the slope, corresponding to the slope of the thawing plate 1.

Furthermore, each of the inner peripheral portions of the pair of lower holding members 3 facing the groove 12 in the vertical direction is provided with three support portions 32b vertically extending upward from the upper ends thereof with a predetermined width. It is provided. The vertical lengths of these supporting portions 32b correspond to the angle of inclination of the thawing plate 1, the upper side of the slope becomes longer and becomes shorter toward the lower side, and the tips thereof are at the angle of inclination of the thawing plate 1. Correspondingly inclined. These supporting portions 32b are formed at positions corresponding to the openings 21 in the inner peripheral portion of the upper holding member 2, and therefore are at positions that are staggered from the holding portions 22b of the upper holding member 2. These supporting portions 32a and 32b support the outer peripheral portion of the thawing plate 1 from below.

An opening 31 is formed in the inner peripheral portion of the lower holding member 3 where the supporting portions 32a and 32b are not formed, by the upper end of the inner peripheral portion and the back surface of the thawing plate 1. In the opening portion 31, the rising portion 34 of the inner peripheral portion allows the water discharged inside the lower holding member 3 to be collected without flowing out to the outside. The water accumulated inside the lower holding member 3 through the opening 31 in this way is again discharged to the outside through the opening 31.

Inside the pair of upper holding members 2 facing each other in the direction of inclination of the thawing plate 1, three engaging portions 23 extending vertically downward from the lower end of the upper edge of the upper holding member 2 are provided. Similarly, each of the insides of the pair of lower holding members 3 facing each other is also provided with three engaging portions 33 extending vertically upward from the upper ends of the lower edge portions of the lower holding members 3. The engaging portion 23 and the engaging portion 33 are formed at positions corresponding to each other. The lower end of the lower holding member 3 provided with the engaging portion 33 is open, and the engaging portions 23 and 3 are opened from this opening.
A screw 4 is inserted upward in each of 3 to lock the upper holding member 2 and the lower holding member 3. Each of the opening portions at the lower end of the lower holding member 3 is provided with a cylindrical leg 35 extending vertically downward so as to surround the opening portion.
A leg rubber 5 is fixed to the tip of each leg 5 so as to cover the opening of each leg 35. The leg rubber 5 hides the screw 4 and allows the defroster body to be prevented from slipping.

Next, FIG. 2 is a sectional view showing a state in which a frozen product is naturally thawed by using the above-mentioned thaw device of this embodiment, and its operation will be described below. When the frozen product is naturally thawed using such a defroster, the thaw plate 1 that has absorbed the heat of the room from the heat-absorbing fins 11 is, at the initial stage, the surface of the thaw plate 1 of the frozen product 6 as described above. Heat is transferred to the frozen material 6 in the contacting portion, and heat is transferred to the frozen material 6 in the portion having an air layer between the defrosting plate 1 and the thawing plate 1. With the lapse of time, the water eluted from the frozen material 6 flows out to the surface of the thawing plate 1, but as shown in FIG. 2, the water 7 on the thawing plate 1 has a plurality of grooves on the surface of the thawing plate 1 due to surface tension. 12 and at the same time, for the most part, along the groove 12 the thawing plate 1
And is discharged into the lower holding member 3 through the opening 21. Therefore, even if time passes, it is possible to reduce the amount of water present between the thawing plate 1 and the frozen material 6 at all times, and it is possible to maintain a state with many air layers,
Heat can be efficiently transferred from the thawing plate 1 to the frozen product 6.

The width, interval and depth of the grooves 12 are set in consideration of the contact area between the frozen product 6 and the surface of the thawing plate 1, the effect of discharging the water 7 eluted from the frozen product 6, and the like. That is,
If the width of the groove 12 is too large or the interval is too narrow, the contact area between the frozen product 6 and the surface of the thawing plate 1 is reduced, and the heat transfer efficiency of the thawing plate 1 is deteriorated. On the other hand, if the width of the grooves 12 is small and the intervals are too wide or too shallow, the ability of the water 7 to collect due to surface tension deteriorates. On the other hand, if the groove 12 is too deep, dirt easily accumulates and is difficult to clean. An optimal design is made in consideration of these points.

Further, in this embodiment, the heat absorbing fins 11 are formed on the back surface of the thawing plate 1, but if the shape is such that the surface area of the back surface of the thawing plate 1 is large and the heat absorption of the thawing plate is good. However, the same endothermic effect can be obtained even if the back surface is embossed.

[0022]

As described above, according to the thawing device of the present invention, a plurality of grooves extending in a predetermined direction are formed on the surface of the thawing plate, and the thawing plate is inclined in the extending direction of the grooves. Since it is configured to be held by the holding means in the posture, natural thawing using this thawing device can reduce the amount of water present between the thawing plate and the frozen product even if time passes, and Since the state with many layers can be always maintained, heat can be efficiently transferred from the thawing plate to the frozen material, and the thawing time can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a defroster according to an embodiment of the present invention,
(A) is a cross-sectional view of the decompressor shown in (b) taken along the line AA and shown in the direction of the arrow, and (b) shows the decompressor shown in (a) taken along the line BB. It is sectional drawing cut | disconnected in a corresponding location and shown from the direction of an arrow.

FIG. 2 is a cross-sectional view showing a state in which a frozen product is naturally thawed using the defroster shown in FIG.

FIG. 3 is a cross-sectional view showing a state in which a frozen product is naturally thawed using a conventional thaw.

[Simple explanation of symbols]

 1 ... Defrosting plate 12 ... Groove 2 ... Upper holding members 22a, 22b ... Holding portion 23, 33 ... Engaging portion 3 ... Lower holding member 32a, 32b ... ・ Supporting part 34 Rising part 21, 31 ... ・ Opening part

Claims (1)

[Claims] 1. A natural thawing device provided with a thawing plate made of a plate-shaped heat transfer material, wherein a plurality of grooves extending in a predetermined direction are formed on the surface of the thawing plate, and the thaw plate is A thawing device, wherein the thawing device is held by a holding means in a posture inclined in the direction in which the groove extends.