JPH05276914A - Thawing machine - Google Patents

Abstract

PURPOSE:To provide a thawing machine capable of efficiently thaw a material to be thawed such as a frozen hand-rolled sushi preferably requiring to set local difference in thawing temperatures. CONSTITUTION:A warm-air generating chamber (8) and a thawing chamber (10) are formed separately in a box shaped apparatus body (1). A heater (12) and a blower (13) are arranged in the warm-air generating chamber. Radiation plates with plural fins are arranged above and below in parallel multilayer with their fin parts (14b) lower side. Further, in the apparatus (1) is formed a pass way of warm-air to blow warm-air heated by the heater into the fin parts (14b) and thawing is locally accelerated at contact points of materials to be thawed and radiation plates with fins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thawing device used for thawing an object to be thawed such as frozen foodstuffs, and in particular, for partially frozen foods such as frozen nigiri sushi, frozen side dishes and side dishes. The present invention relates to a thaw device suitable for thawing a large amount of thawed substances, which are preferably thawed at different thawing temperatures.

[0002]

2. Description of the Related Art For example, when thawing frozen nigiri sushi, the thawing temperature of the rice portion is increased by making the thawing temperature different between the rice portion and the sushi material such as fillet fish placed on it. Lowering the thawing temperature of the material is desired from the viewpoint of taste and the quality maintenance of the material.

However, in a conventional defrosting apparatus, particularly a large-scale decompressing apparatus for business use, the defrosting shelves are simply arranged in multiple stages in the vertical direction to naturally thaw the objects to be defrosted placed on the defrosting shelves. Therefore, the whole thing to be thawed was thawed at a uniform thaw temperature, and therefore the flavor and the quality of the sushi material had to be lowered.

Moreover, there is a drawback that the defrosting process takes time and the efficiency is low.

The present invention has been made in order to solve such a drawback, and it is possible to efficiently thaw an object to be thawed, such as frozen nigiri sushi, in which it is better to provide a partial difference in the thawing temperature. An object is to provide a decompression device.

[0006]

In order to achieve the above-mentioned object, the present invention shows a warm air generating chamber (8) inside a box-shaped device body (1), as shown with reference to the drawings. And a thawing chamber (10) are partitioned and a heater (12) and a blower (13) are arranged in the warm air generating chamber (8), while a plurality of fins are provided in the thawing chamber (10). Heat sink (14)
Are arranged in a multi-stage vertically with the fin portion (14b) facing downwards, and the warm air heated by the heater is placed in the fin body (14b) of the finned radiator plate (14b) in the apparatus body (1). ), The defrosting device is characterized in that a warm air flow passage is formed.

[0007]

[Operation] The air in the warm air generating chamber (8) heated by the heater (12) is forcibly sent by the blower (13) to the fin portion (14b) of the finned radiator plate (14), and the heat is dissipated on the radiator plate. The thawing of the portion of the object to be defrosted (D) placed on the substrate in contact with the heat dissipation plate is locally promoted.

[0008]

Embodiments of the present invention will now be described with reference to FIGS.

This embodiment shows a thawing device having a refrigerating function of keeping the object to be thawed at a constant temperature after thawing and refrigerating as it is.

In FIG. 1, FIG. 2, FIG. 4, and FIG. 5, (A)
Is a thawing unit, and (B) is a refrigerator unit installed below the thawing unit.

The defrosting unit (A) has a box-shaped unit body (1) made of a heat insulating material, and an opening / closing door (3) with a glass window (2) is attached to the front of the body (1). In addition, a glass window (4) is also provided on the side surface of the main body.

Above the inside of the unit body (1),
An inclined picture wall (5) extending rearward from the front portion (front door side) of the ceiling wall and a horizontal picture wall (6) horizontally extending rearward from the lower end of the inclined picture wall are provided. Upper and lower picture walls (7) are provided so as to be connected to the rear side of the picture wall (6). Then, the inside of the main body (1) is partitioned by these painting walls,
A warm air generating chamber (8) is formed in the upper space of the main body, and a warm air distributing chamber (9) communicating with the warm air generating chamber (8) is formed in the rear space. The front space is a space for decompression.

Furthermore, this space for thawing is provided with two vertically decompressing chambers (10) by a vertically elongated central picture wall (11) standing in the widthwise central part of the main body (1).
It is divided into (10).

A heater (12) made of stainless steel with a spiral fin is installed in the warm air generating chamber (8), and a blower (13) is installed in the rear corner of the heater (12). The air heated by the heater (12) can be forcibly sent to the warm air distribution chamber (9).

In each of the thawing chambers (10), a plurality of aluminum finned heat radiating plates (14) as thawing shelves are arranged in a horizontal state and are vertically arranged in parallel in a plurality of thawing object accommodating spaces. There is. On the other hand, the central wall (11) and the left and right side walls (1
5) is a pair of shelf brackets (1
6) is stuck. Then, the bottom plate (17) made of aluminum is placed on the shelf receiving metal fitting (16) in a suspended state,
The heat sink with fins (14) is detachably mounted on the bottom plate (17).

In this embodiment, as the heat sink with fins (14), as shown in FIG. 6, a large number of fins (14b) having a high protruding height are vertically formed on a flat base (14a). Further, an aluminum extruded profile is used in which the fins (14b) are connected at the intermediate portion in the height direction by a reinforcing wall (14c). The heat sink with fins is oriented such that the base (14a) is on the upper side and the fin (14b) is on the lower side, and the longitudinal direction of the fin (14b) is the front-back direction, that is, the hot air distribution chamber (9). It is placed on the bottom plate (17) in a state of being aligned with the direction connecting the front door (3).

Further, the rear ends of the finned heat dissipation plate (14) and the bottom plate (17) are connected to the ventilation holes (7a) formed in the rear upper and lower image walls (7). Therefore, the hot air from the hot air distribution chamber (9) can pass only along the fins (14b). In addition, at the front ends of the finned heat sink (14) and the bottom plate (17), as shown in FIG.
As shown in (b), the cap member (1
8) is fitted. Moreover, this cap member (1
A plurality of air outlets (18a) are formed on the lower surface of 8), and the hot air forcedly blown from the hot air distribution chamber (9) through the fins (14a) is blown out by the air outlets (18a). It is designed to blow out from 18a) into the thaw chamber (10).

Further, as shown in FIG. 2, a plurality of ventilation holes (5a) are formed in the inclined wall (5) provided in the upper part of the unit body (1), and the cap member ( The warm air blown into the thawing chamber (10) from the blowout port (18a) of 18) flows back to the warm air generating chamber (8) through the ventilation hole (5a) of the inclined wall (5). As a result, the warm air generating chamber (8) travels from the warm air generating chamber (8) to the warm air distributing chamber (9), the fin portion (14b) of the finned radiator plate (14), and the defrosting chamber (10). ) To the hot air flow passage is formed.

A refrigerator (30) including a condenser is accommodated in the refrigerator unit (B), while an evaporator (31) is provided in the warm air distribution chamber (9) of the thawing unit (A). A refrigerant circuit that is arranged and that surrounds the refrigerator (30) and the evaporator (31) is formed. The refrigerator (30) and the evaporator (31) are provided with a thawing chamber (10) after thawing the object (D) to be thawed.
It serves to cool the inside to refrigerate the thawed product to the most preferable temperature for quality. For example, while thawing by operating the heater (12), the temperature inside the thawing chamber (10) is set to around 25 ° C, and after thawing, the cooling system is activated to lower the temperature inside the thawing chamber to around 10 ° C. It is said that the thawed product can be kept refrigerated as it is. To control the temperature like this, a temperature sensor (19) is provided in the warm air generating chamber (8),
Based on the output from the temperature sensor (19), the heater (1
2) It can be performed by electrically controlling the operation circuit of the refrigerator (30) and the like.

Next, the operation of the decompression device according to the illustrated embodiment will be described.

First, the front door (3) is opened and the defrosting shelf (14) is opened.
Place the object to be thawed (D) on. Next, the heater (12) and the blower (13) are operated, and the air in the warm air generating chamber (8) heated by the heater (12) is directed to the warm air distribution chamber (9) by the blower (13). Forced air blow. The air in the warm air distribution chamber (9) further flows into the fin portion (14b) of each finned radiator plate (14) by the blowing pressure, but the bottom plate ( Due to the presence of the heat exchanger (17), warm air flows back and forth only in the fin portion (14b) space between the base portion (14a) and the bottom plate (17) of the heat dissipation plate along the length direction of the fin portion. The heat radiating plate (14) is heated by the hot air, and the thawing of the object to be defrosted (D) in contact with the heat radiating plate (14) is particularly promoted at the lower side. Therefore, even if the object to be thawed (D) is nigiri sushi or the like, by arranging the sushi material on the upper side, the thawing of only the rice portion is promoted and the thawing of the material portion proceeds slowly. Especially when the object to be thawed (D) is vacuum packed, the heat exchange action between the atmosphere in the thaw chamber (10) and the object to be thawed (D) is remarkable because the inside of the pack is vacuum. Thawed by being hindered, and thawing proceeds due to the heat exchange action exclusively through contact with the heat sink (14), the object to be thawed (D)
The local thawing of the lower part of the can be efficiently performed.

Fin portion (14b) of heat sink with fin (14)
The warm air that has passed through the
) To the thawing chamber (10) and then to the thawing chamber (1
From (0) to the warm air generating chamber (8) through the ventilation hole (5a) of the inclined wall (5), the warm air is circulated in the above cycle thereafter. In this way, thawing is performed by circulating warm air, and the temperature in the thawing chamber (10) is controlled to around 25 ° C. during thawing.

When the thawing is completed, the heater (12) is stopped, the refrigerator (30) and the evaporator (31) are subsequently activated, and the blower (13) circulates the cool air in the same circulation cycle as described above. The inside of the thaw chamber (10) is set and maintained at, for example, about 10 ° C., and the thawed product is kept refrigerated. Therefore, it can be suitably used particularly in a convenience store or the like where it is highly necessary to thaw frozen sushi and the like and refrigerate it.

FIG. 7 shows another embodiment of the present invention. In this embodiment, an upper and lower drawing wall (40) parallel to the front door (3) is provided at the front position of the thawing chamber (10), and the warm air outflow chamber (41) is provided between the drawing wall and the front door. The fins of the heat radiating plate (14) and the bottom plate (17) are arranged so that the front ends of the fins penetrate the partition wall (40) and face the hot air outflow chamber (41). With this configuration, the hot air that has flowed out of the air outlet (18a) of the cap member (18) through the fin portion (14b) of the finned heat dissipation plate (14) is stored in the defrosting object accommodation space. Can be circulated to the hot air generating chamber (8) as it is without leading to, and the thawing of the upper part of the object to be thawed (D) can be delayed more and more, and the upper and lower parts of the object to be thawed can be delayed. The thawing temperature difference between the can be further increased. In FIG. 7, the same components as those shown in FIGS. 1 to 6 are designated by the same reference numerals, and the description thereof will be omitted.

In the embodiment described above, the heater (12) and the refrigerator (30) are operated so that both the thawing function and the refrigerating function can be exhibited. However, the heater is operated even after thawing. It can also be used as a hot storage. Alternatively, the refrigerator may be used by operating only the refrigeration cycle.

[0026]

As described above, according to the present invention, the warm air generating chamber and the defrosting chamber are formed in the inside of the box-shaped device body, and the heater and the blower are arranged in the warm air generating chamber. On the other hand, a plurality of heat sinks with fins are arranged in the defrosting chamber in a horizontal state with the fins on the lower side,
In addition, since the apparatus main body is characterized in that a hot air flow passage for sending hot air heated by the heater to the fins of the finned radiator plate is formed, a finned radiator plate for the object to be thawed is provided. It is possible to locally promote the thawing of only the contact portion. Therefore, like frozen nigiri sushi,
A thaw device that can thaw an object to be thawed, which partially requires a thaw temperature difference, can be efficiently thawed in a short time without impairing flavor and quality.

By the way, using the device according to the present invention, -2
The time required for raising the temperature of the frozen nigiri sushi stored at 0 ° C to 10 ° C while maintaining the temperature in the thawing chamber at 25 ° C was 90 minutes. Further, when the temperature of the rice center portion was 10 ° C., the temperature of the material was as low as 7 ° C., and the desired temperature difference could be generated.

On the other hand, the same frozen sushi as above was prepared at 25 ° C.
When naturally thawed in the atmosphere, it took 180 minutes to raise the temperature to 10 ° C.

Therefore, it has been confirmed that according to the present invention, the object to be thawed can be efficiently thawed while causing a partial difference in the thawing temperature.

[Brief description of drawings]

FIG. 1 is a side sectional view of a thawing device.

FIG. 2 is a front sectional view of the same.

FIG. 3A is an exploded perspective view showing the vicinity of a heat sink with fins, and FIG. 3B is a sectional view in a mounted state.

FIG. 4 is a side view of the thawing device.

FIG. 5 is a front view of the same.

FIG. 6 is a front view of a radiator plate with fins.

FIG. 7 shows another embodiment of the present invention and is a side sectional view of a thawing device.

[Explanation of symbols]

 D ... Thaw object 1 ... Unit body (apparatus body) 8 ... Warm air generation chamber 10 ... Thaw chamber 12 ... Heater 13 ... Blower 14 ... Heat sink with fin 14b ... Fin part

Claims (1)

[Claims] A hot air generating chamber (8) and a defrosting chamber (10) are formed in the box-shaped device body (1), and a heater (12) is provided in the warm air generating chamber (8). ) And a blower (13) are arranged, while a plurality of finned heat dissipation plates (14) are arranged in the defrosting chamber (10) in a horizontal state with the fins (14b) facing down. A defrosting device, characterized in that a warm air flow passage is formed in the device body (1) for sending hot air heated by a heater to the fin portion (14b) of the finned radiator plate (14).