JP2004361056A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact cooling device capable of freezing or the like a member to be cooled in a short time. <P>SOLUTION: The cooling device is provided with an outer tank 2 having an opening in an upper part, a first cooling tank 6 rotatably attached in the outer tank 2 and housing antifreeze 5 in an interior, a first rotating device 7 built in the outer tank 2 and rotating the first cooling tank 6, a first basket body 8 fixed to the outer tank 2, housed in the first cooling tank 6, and housing the member P to be cooled in an interior, and a first refrigerant pipe 17 attached to an outer side of the first basket body 8 for passing a refrigerant cooling the antifreeze 5. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cooling device for freezing food or the like using an antifreeze solution.
[0002]
[Prior art]
FIG. 5 is a schematic longitudinal sectional view of a conventional cooling device (for example, see Patent Document 1). The conventional cooling device 50 includes a freezing tank 52 that contains an antifreeze liquid 51 for freezing food, and a refrigerator 53 that is disposed below the freezing tank 52 and cools the antifreeze liquid 51 therein. In the upper part of the freezing tank 52, an opening 55 for taking in and out the object to be cooled 54 such as food, and a covering portion 56 covering portions other than the opening 55 are formed. A frame 57 formed by winding a refrigerant pipe 57a through which a refrigerant for cooling the antifreeze liquid 51 flows is disposed below the covering portion 56. Although not shown, the refrigerant pipe 57a is connected to the refrigerator 53. A stirrer 58 for stirring the antifreeze liquid 51 and promoting heat exchange between the antifreeze liquid 51 and the refrigerant in the refrigerant pipe 57a is provided vertically below the frame 57 below the covering portion 56. I have. A motor 59 for driving the stirrer 58 is attached to the stirrer 58. The motor 59 is disposed on the covering portion 56 as shown in FIG.
[0003]
[Problems to be solved by the invention]
However, in the conventional cooling device 50, since the frame 57 and the stirrer 58 are arranged in a part of the space in the freezing tank 52, this space cannot be used as a space for freezing the object 54 to be cooled. There is a problem.
[0004]
Further, as shown in FIG. 5, since the stirrer 58 is disposed at one corner of the freezing tank 52, it is necessary to increase the rotation speed of the stirrer 58 in order to cause a flow in the entire freezing tank 52. Therefore, many bubbles are generated in the freezing tank 52. Due to this bubble, heat conduction between the antifreeze liquid 51 and the cooled object 54 deteriorates, and there is a problem that the time required for freezing the cooled object 54 becomes longer.
[0005]
The present invention has been made to solve the above problems, and has as its object to provide a cooling device that is compact and can freeze a material to be cooled in a short time.
[0006]
[Patent Document 1]
JP-A-8-298973 (FIG. 1)
[0007]
[Means for Solving the Problems]
The apparatus of the present invention comprises a body having an opening at an upper part, a first cooling tank rotatably mounted in the body and containing an antifreeze therein, and a first cooling tank built in the body being rotated. A first rotating device, a first car body fixedly mounted on the body and housed in a first cooling tank, and a first car body housing a body to be cooled therein, attached to an outside of the first car body; A first refrigerant passage for flowing a refrigerant for cooling the antifreeze.
[0008]
According to this configuration, since the antifreeze circulates through the object to be cooled by the rotation of the first cooling tank, heat conduction is promoted between the antifreeze and the object to be cooled, and the antifreeze efficiently transfers heat from the object to be cooled. Can be well absorbed. Similarly, since the antifreeze circulates around the first refrigerant passage, heat conduction is promoted between the antifreeze and the refrigerant flowing in the first refrigerant passage, and heat absorbed by the antifreeze from the cooled object is transferred to the refrigerant. It is absorbed efficiently. Thus, the object to be cooled can be cooled in a short time. Further, since the first cooling tank itself is rotated, it is not necessary to install a stirrer in the first cooling tank as in the related art. Thereby, the whole apparatus can be made compact.
[0009]
In addition, a first air bubble mixing preventing member attached to the first car body or the airframe for preventing air bubbles from being mixed into the antifreeze liquid is provided so as to be located near the level of the antifreeze liquid in the first cage body. Furthermore, the first air bubble mixing preventing member may be formed to have a size to cover the depression of the liquid level of the antifreeze generated when the first cooling tank is rotated.
[0010]
When the first cooling bath is rotated, the antifreeze in the first cooling bath generates a vortex in the center of the liquid level of the antifreeze due to centrifugal force and rotational force. As a result, the center of the liquid surface of the antifreeze liquid is depressed, and the outer periphery rises along the inner surface of the first cooling tank. At this time, air is sucked into the depression of the liquid level of the antifreeze, and bubbles are mixed in the antifreeze. Due to these bubbles, heat conduction between the antifreeze liquid and the refrigerant flowing through the cooled object or the first refrigerant passage is hindered.
[0011]
In order to prevent this, in the present invention, the first air bubble mixing suppressing member covers the depression of the liquid level of the antifreeze. As a result, it is possible to prevent air from being sucked into the antifreeze liquid and air bubbles from being mixed into the antifreeze liquid, and prevent a decrease in heat conduction between the antifreeze liquid and the refrigerant flowing through the cooled object and the first refrigerant passage. be able to. Thus, the object to be cooled can be cooled in a short time.
[0012]
The device of the present invention, which is different from the above, includes a second cooling tank containing an antifreeze therein, a second refrigerant passage attached to an inner surface of the second cooling tank for flowing a refrigerant for cooling the antifreeze, (2) A second cage body for accommodating the object to be cooled, which is accommodated in the second cooling tank while being rotatably attached to the second cooling tank, and rotates the second cage body attached to the second cooling tank. A second rotating device.
[0013]
According to this configuration, the object to be cooled accommodated therein is rotated together with the second cage in the antifreeze. This promotes heat conduction between the antifreeze and the object to be cooled, and the antifreeze can efficiently absorb heat from the object to be cooled. In addition, the rotation of the second cage body causes the antifreeze to circulate throughout the second cooling tank, so that the periphery of the second refrigerant passage also circulates. As a result, heat conduction is promoted between the antifreeze and the refrigerant flowing in the second refrigerant passage, and the heat absorbed from the object to be cooled is efficiently absorbed by the refrigerant. This allows the object to be cooled to be cooled in a short time. Further, in the apparatus of the present invention, since the second cage itself is rotated, it is not necessary to install a stirrer in the second cooling tank as in the conventional case. This also makes it possible to make the entire device compact.
[0014]
An antifreeze liquid introducing member for introducing the antifreeze around the second cage into the second cage may be protruded from the outside of the second cage.
[0015]
According to this configuration, since the antifreeze is efficiently introduced into the second cage, heat conduction between the antifreeze and the object to be cooled is promoted. Thus, the object to be cooled can be cooled in a short time.
[0016]
On the upper side of the second cooling tank, there is further provided an elevating device for moving the second cage body up and down from the second cooling tank, and the second cage body is pulled out of the second cooling tank, and The second cage may be configured to be able to be rotated by the second rotating device.
[0017]
According to this configuration, the second cage body can be easily taken in and out of the second cooling tank, and the drainage of the antifreeze adhering to the object to be cooled can be promoted. In addition, since the elevating device is arranged above the second cooling tank, the installation area is reduced and the entire equipment is compact.
[0018]
A second air bubble mixing preventing member attached to the second cage body for preventing air bubbles from being mixed in the antifreeze liquid is further provided so as to be located near the liquid level of the antifreeze liquid in the second cooling tank. The second air bubble prevention member may be formed to have a size that covers a depression in the liquid level of antifreeze generated when the second cage body is rotated.
[0019]
According to this configuration, similarly to the first air bubble mixing prevention member, it is possible to prevent air from being sucked into the antifreeze solution and air bubbles from being mixed into the antifreeze solution. It is possible to prevent a decrease in heat conduction with the refrigerant. This allows the object to be cooled to be cooled in a short time.
[0020]
The first or second air bubble mixing preventing member may be formed to be vertically movable so that the relative position of the antifreeze with respect to the liquid level can be adjusted.
[0021]
According to this configuration, the first or second bubble mixing prevention member can be easily moved to a position where air bubbles can be prevented from being mixed into the antifreeze. As a result, it is possible to prevent air bubbles from being mixed into the antifreeze, and to prevent a decrease in heat conduction between the antifreeze and the object to be cooled. This allows the object to be cooled to be cooled in a short time.
[0022]
The first cooling tank and the second cooling tank may be configured to have a cylindrical shape.
[0023]
When each tank is square, the antifreeze stays at the corners, and the antifreeze in the corners does not contribute to cooling the object to be cooled. However, when each tank has a cylindrical shape, since there is no corner, the antifreeze circulates uniformly throughout the inside of each tank without stagnation. This increases the space that contributes to cooling the object to be cooled. As a result, the entire equipment can be made compact. Moreover, when each tank is cylindrical, the flow in the tank is smooth, so that heat conduction with the object to be cooled is also promoted. Thus, the object to be cooled can be cooled in a short time.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(1st Embodiment)
FIGS. 1A and 1B are diagrams showing a basic configuration example of a cooling device according to a first embodiment of the present invention, wherein FIG. 1A is a schematic longitudinal sectional view, and FIG. 1B is a sectional view taken along line AA of FIG. . Hereinafter, the up-down directions in the drawings are respectively referred to as up-down directions.
[0025]
This cooling device is mainly used for freezing and cooling foods and the like. Here, a case in which food and the like are frozen using this cooling device will be described as an example.
[0026]
As shown in FIG. 1 (a), the cooling device 1 includes a box-shaped outer tank 2 having an opening 2a at an upper part, and the inside thereof is separated into two upper and lower chambers 2A, 2B via a partition plate 3. Is divided into In the upper chamber 2A, various devices for freezing a cooled object P to be described later are accommodated. The lower chamber 2B houses a refrigerator 4 that supplies a refrigerant (for example, chlorofluorocarbon or ammonia) cooled to a predetermined temperature (for example, −30 ° C.). The outer tub 2 is not limited to the above structure. For example, it may be in the shape of a frame made of a mold material.
[0027]
In the upper chamber 2A, a first cooling tank 6 for containing the antifreeze 5 therein, a first rotating device 7 for rotating the first cooling tank 6, and an inside covered in the first cooling tank 6 are provided. The first cage 8 and the like that house the cooling body P are housed therein. As the antifreeze 5, brine, salt water, or the like is used.
[0028]
The first cooling tank 6 is a bottomed cylindrical container having an opening at the top. A driven shaft 9 for transmitting rotation from a motor 15 described later to the first cooling tank 6 is provided at a central portion outside the bottom of the first cooling tank 6 so as to protrude coaxially with the axis of the first cooling tank 6. ing. The shaft end of the driven shaft 9 is rotatably supported by a bearing 10 installed on the partition plate 3. A driven sprocket 13 driven by a motor 15 to be described later via a V-belt 12 is mounted in the middle of the driven shaft 9 in the axial direction.
[0029]
As shown in FIG. 1B, three guide rollers 14 for guiding the first cooling tub 6 in the rotation direction are provided on the outer periphery of the upper portion of the first cooling tub 6. The first cooling tank 6 is arranged at a predetermined interval in the circumferential direction so as to abut the portion. The guide roller 14 is rotatably supported by a roller support member 14 a attached to the inner surface of the outer tub 2.
[0030]
The first rotating device 7 is disposed between the first cooling tank 6 and the outer tank 2 as shown in FIG. 1A, and includes a motor 15 for driving the first cooling tank 6 and a motor 15 for driving the first cooling tank 6. A drive sprocket 16 mounted on the drive shaft. The driving sprocket 16 is arranged at the same height as the driven sprocket 13. The V-belt 12 is looped between the driving sprocket 16 and the driven sprocket 13 in a loop. Of course, the motor 15 and the driven shaft 9 may be directly connected without performing the above. Thereby, the cooling equipment 1 can be made compact.
[0031]
As described above, the motor 15 can rotate the first cooling tank 6 via the V-belt 12 at a predetermined rotation speed (for example, 70 rpm).
[0032]
Although not shown, a heat insulating member is attached to the outer surface of the first cooling tank 6 so as not to interfere with the guide roller 14 and the rotating shaft 9.
[0033]
The first cage 8 is formed of a cylindrical container with a bottom, and has an opening 8a at the top thereof for inserting and removing the object P to be cooled. The first cage 8 is formed in a net shape so that the antifreeze 5 can flow in or out.
[0034]
Around the outer periphery of the first cage 8, first refrigerant pipes 17 for flowing the refrigerant supplied from the refrigerator 4 are wound at predetermined intervals in the axial direction of the first cage 8. Although not shown, the inlet 17a and the outlet 17b of the first refrigerant pipe 17 are connected to a refrigerant supply port 4a and a refrigerant return port 4b of the refrigerator 4, respectively. In addition, a flange 8b for attaching to the upper part of the outer tub 2 extends radially outward from the upper end edge of the first cage body 8.
[0035]
The shape of the first cage 8 is set according to the volume of the cooled object P or the like. When the first cage 8 is inserted into the first cooling tank 6 in a state where the first refrigerant pipes 17 are attached to the first cage 8, the first refrigerant pipes 17 have an outer diameter of the first cooling pipe 6. It is set so as not to interfere with the inner surface of the tank 6. The length of the first cage 8 in the axial direction is such that when the antifreeze 5 is put into the first cooling tank 6, the cooled object P and the first refrigerant pipe 17 accommodated in the first cage 8 are formed. Is set to be immersed in the antifreeze 5. Here, the first cage body 8 is formed in a cylindrical shape, but may have another shape, for example, a box shape.
[0036]
In the cooling device 1 configured as described above, first, the antifreeze 5 is poured into the first cooling tank 6 to a liquid level at which the first refrigerant pipe 17 in the first cooling tank 6 is completely immersed. . After that, the object to be cooled P is accommodated in the first cage 8. Thereby, the cooled object P is immersed in the antifreeze 5. After that, the refrigerant is supplied from the refrigerator 4 to the first refrigerant pipe 17. At the same time, the motor 15 is driven to rotate the first cooling tank 6. Then, the antifreeze 5 circulates in the first cooling tank 6 in the same direction as its rotation direction. Thereby, heat conduction between the antifreeze 5 and the refrigerant in the first refrigerant pipe 17 is promoted, and the antifreeze 5 is cooled to a predetermined temperature (for example, −30 ° C.). At the same time, heat conduction is promoted between the antifreeze 5 and the cooled object P. As a result, the cooled object P can be frozen in a short time.
[0037]
Further, it is desirable to attach a first air bubble mixing prevention device 18 for preventing air bubbles from being mixed into the antifreeze liquid, on the upper part of the outer tank 2.
[0038]
The first air bubble mixing prevention device 18 includes a prevention member 19 for preventing air from being sucked into a depression at the center of the liquid surface of the antifreeze 5 generated when the first cooling tank 6 is rotated, and a prevention member 19. And a support member 20 for supporting the With the support member 20 attached to the upper part of the outer tub 2, the prevention member 19 is positioned near the liquid level of the antifreeze 5 in the first cage 8 (for example, at a position 20 to 50 mm below the liquid level of the antifreeze 5). ) Is located. When the first cooling bath 6 is rotated, the prevention member 19 is slightly immersed in the antifreeze 5 (for example, about 10 mm below the level of the antifreeze 5). The installation position of the prevention member 19 is set by an experiment or the like.
[0039]
The prevention member 19 is formed in a disk shape, and its outer diameter is set to be larger than the diameter of the depression of the liquid level of the antifreeze 5 generated when the first cooling tank 6 is rotated. Specifically, the outer diameter of the prevention member 19 is, for example, 70 to 90% of the inner diameter of the first cage 8 in consideration of the fact that the prevention member 19 can be easily inserted into the first cage 8. Can be set to This value is actually set by an experiment or the like.
[0040]
The support member 20 includes a support portion 20a detachably attached to the upper portion of the outer tub 2, a support shaft 20b extending toward the support portion 20a at the center of the prevention member 19, and vertically moving the support shaft 20b. And a guide 20c.
[0041]
The support portion 20a has a rectangular shape and is formed so as to cover the opening 2a of the outer tub 2. That is, it has a function as an upper lid of the outer tub 2, and can prevent heat from flowing in from the opening 2 a of the outer tub 2. However, the shape of the support portion 20a is not limited to the above shape as long as the support portion 20a can support the support shaft 20b.
[0042]
A guide 20c is attached to the upper central portion of the support portion 20a. The guide 20c is provided with a female screw (not shown) penetrating in the axial direction of the support shaft 20b. A male screw screwed into a female screw (not shown) of the guide 20c is provided at an end of the support shaft 20b on the support portion 20a side. Therefore, when the support shaft 20b is rotated with respect to the guide 20c, the support shaft 20b moves up and down.
[0043]
In the above configuration, since the first air bubble mixing suppressing member 18 covers the depression of the liquid level of the antifreeze 5 generated when the first cooling bath 6 is rotated, air is sucked into the antifreeze 5 and air bubbles are generated in the antifreeze 5. Mixing can be prevented. Further, since the support shaft 20b can be moved up and down, the relative position between the prevention member 19 and the liquid level of the antifreeze 5 can be adjusted. Thereby, the prevention member 19 can be moved to a position where air is not sucked into the antifreeze 5. As described above, it is possible to prevent a decrease in heat conduction between the antifreeze 5 and the cooling object P and the refrigerant in the first refrigerant pipe 17. As a result, the cooled object P can be frozen in a short time.
(Second embodiment)
The difference between the cooling device according to the second embodiment of the present invention and the first embodiment is that the second cage housing the object to be cooled is rotated. Therefore, parts that are the same as the parts of the cooling device according to the first embodiment are given the same reference numerals, and detailed descriptions thereof are omitted.
[0044]
2A and 2B are schematic longitudinal sectional views illustrating a basic configuration example of a cooling device according to a second embodiment of the present invention, wherein FIG. 2A illustrates a state during cooling, and FIG. 2B illustrates a state before and after cooling. ing. 3A and 3B show an example of the basic configuration of the second cage, wherein FIG. 3A is a perspective view, and FIG. 3B is a plan view in which fins are attached to the outer peripheral surface of the second cage. . Hereinafter, the up-down directions in the drawings are respectively referred to as up-down directions.
[0045]
As shown in FIG. 2, the cooling device 30 according to the second embodiment includes a second cooling tank 31 that stores the antifreeze 5 therein, and a cooling target that is stored in the second cooling tank 31. It includes a second cage 32 for accommodating P, a second rotating device 33 for rotating the second cage 32, and a lifting device 34 for lifting and lowering the second cage 32.
[0046]
The second cooling tank 31 is formed in a cylindrical shape with a bottom, and is attached to the outer tank 2 so as to be accommodated in the upper chamber 2A of the outer tank 2. This constitutes a so-called double shell container. The upper part of the second cooling tank 31 has an opening 31a for inserting the antifreeze 5 and a second cage 32 described later. A space between the outer tank 2 and the second cooling tank 31 is filled with a heat insulating material.
[0047]
A second refrigerant pipe 35 through which the refrigerant supplied from the refrigerator 4 flows is wound around the inner peripheral surface of the second cooling tank 31 at predetermined intervals in the axial direction of the second cooling tank 31. Although not shown, an inlet 35a and an outlet 35b of the second refrigerant pipe 35 are connected to a refrigerant supply port 4a and a refrigerant return port 4b of the refrigerator 4, respectively.
[0048]
As shown in FIG. 3A, the second cage 32 has a cylindrical shape, and is formed of a net-like material through which the antifreeze 5 can flow in or out. Four ribs 32a for reinforcing the second cage body 32 are circumferentially arranged on the outer peripheral surface of the second cage body 32 in the circumferential direction. The rib 32a is attached over the entire length of the second cage 8 in the axial direction. The shape or number of the ribs 32 a is appropriately set according to the size of the second cage 32.
[0049]
A door 32b for inserting the cooled object P into the second cage 32 is attached so as to pass the ribs 32a adjacent to each other. Although not shown, the door 32b is attached to one rib 32a via a hinge joint, and is detachably attached to the other rib 32a. Thus, the door 32b can be opened and closed radially outward of the second cage 32 around the hinge joint. The door 32b has a net shape so that the antifreeze 5 can flow in or out.
[0050]
Also, as shown in FIG. 3B, each rib 32a may be provided with a fin 32c for introducing the antifreeze 5 into the second cage 32 when the second cage 32 is rotated around an axis. Good. The fins 32c have a plate shape and are disposed over the entire length of each rib 32a. The fins 32c protrude outside the respective ribs 32a at a predetermined angle in the rotation direction of the second cage 32. This angle is set by an experiment or the like. The fin 32c constitutes an antifreeze liquid introducing member. Although the fins 32c are formed in a plate shape here, they may be convex or curved to the opposite side in the rotation direction of the second cage body 32 in a cross-sectional view, and may have a U-shaped or L-shaped shape. May be formed.
[0051]
The second rotating device 33 is composed of a known electric motor or the like, and is attached to an upper portion of a plate-shaped support member 36 that moves in a vertical direction by a lifting device 34 described later. The second rotating device 33 is provided with a driven shaft 33a extending downward. The support member 36 is provided with a hole through which the driven shaft 33a passes. The driven shaft 33a passes through the hole so that the shaft end of the driven shaft 33a is coaxial with the axis of the second cage 32. Is attached to the upper central portion of the second cage 32. Thereby, the second cage body 32 can be rotated around the axis.
[0052]
Between the support member 36 of the driven shaft 33a and the second cage 32, a second bubble mixing preventing member 37 for preventing bubbles from mixing into the antifreeze 5 may be provided.
[0053]
The second air bubble mixing preventing member 37 is formed in a disk shape, and the outer diameter thereof is set to be larger than the diameter of the depression of the liquid level of the antifreeze 5 generated when the second cage 32 is rotated. Have been. Specifically, the outer diameter of the second air bubble mixing preventing member 37 is set to be substantially the same as the outer diameter of the second cage 32, for example, as shown in FIG. However, this value is actually set by an experiment or the like.
[0054]
The second bubble mixing preventing member 37 is attached to the driven shaft 33a so as to be movable in the axial direction. Specifically, for example, the second bubble mixing prevention member 37 may be configured to be screwed to the driven shaft 33a. In this case, it is desirable to provide a nut or the like for determining the position of the second bubble mixing prevention member 37 on the driven shaft 33a. Thereby, the relative position between the second air bubble mixing preventing member 37 and the antifreeze 5 can be easily adjusted. As a result, it is possible to reliably prevent air bubbles from entering the antifreeze 5. The position adjustment of the second bubble mixing prevention member 37 is performed when the second cage 32 is pulled out from the second cooling tank 31 upward as shown in FIG.
[0055]
The elevating device 34 includes a motor 38 for elevating and lowering the second cage 32, a rotating shaft 38a connected thereto, and a frame 39 supporting these. The frame 39 is attached to the upper part of the outer tub 2.
[0056]
Two motors 38 are provided on the upper portion of the frame body 39 and are symmetrically arranged in parallel with the axis of the second cage 32 and at substantially the same distance from the axis of the second cage 32. .
[0057]
The driven shaft 38a is formed to extend below the motor 38. The rotating shaft 38 a has a male screw provided over the entire axial direction, and is screwed to the support member 36. Thus, the support member 36 and the second cage 32 connected to the support member 36 can be moved up and down.
[0058]
Here, the number of the motors 38 is two, but may be one or three or more. In the case where there is one motor 38, it is necessary to provide a transmission mechanism for transmitting rotation from the motor 38 to two or more rotating shafts 38 a in the frame 39.
[0059]
In the cooling device 30 configured as described above, first, as shown in FIG. 2B, the second cage 32 is pulled out from the second cooling tank 31 upward. In this state, first, the door 32a of the second car body 32 is opened, and the object to be cooled P is accommodated in the second car body 32. Thereafter, the antifreeze 5 is poured into the second cooling tank 31 to a liquid level at which the second refrigerant pipe 35 in the first cooling tank 31 is completely immersed. Thereafter, the second cage 32 is lowered by the elevating device 34 and accommodated in the second cooling tank 31 as shown in FIG. Thereby, the cooled object P is immersed in the antifreeze 5. At the same time, the second bubble intrusion prevention device 37 is arranged near the level of the antifreeze liquid. Thereafter, the refrigerant is supplied from the refrigerator 4 to the second refrigerant pipe 35. At the same time, the second rotating device 33 is driven to rotate the second cage 32. Then, the antifreeze 5 circulates in the second cooling bath 31 in the same direction as its rotation direction. Thereby, heat conduction between the antifreeze 5 and the refrigerant in the second refrigerant pipe 35 is promoted, and the antifreeze 5 is cooled to a predetermined temperature (for example, −30 ° C.). At the same time, heat conduction is promoted between the antifreeze 5 and the cooled object P. As a result, the cooled object P can be frozen in a short time.
[0060]
After the cooled object P is frozen, the second cage 32 is pulled out from the second cooling tank 31 upward as shown in FIG. After that, the second cage 32 is rotated using the second rotating device 33. Thereby, the antifreeze 5 adhering to the cooled object P can be dropped. As a result, the object to be cooled P can be taken out of the second cage 32 in a short time.
[0061]
【Example】
Hereinafter, the present invention will be described in detail based on examples.
〔Example〕
In the embodiment, as shown in FIG. 1, a first cooling tank 6 that rotates around an axis is provided. 240 liters of brine was used as the antifreeze 5 stored in the first cooling tank 6. As the refrigerator 4, a refrigerator having a refrigerating capacity of 1.5 kW was used.
(Comparative example)
The comparative example is different from the embodiment mainly in that the freezing tank 52 is fixed and a stirrer 58 is installed in the freezing tank 52 as shown in FIG. Further, as in the example, 240 liters of brine was used as the antifreeze 5 stored in the freezing tank 52. As the refrigerator 4, a refrigerator having a refrigerating capacity of 1.5 kW was used.
[Evaluation of properties]
Using the cooling apparatus of the example and the comparative example, the same amount of kneaded food (cooling target) was cooled, and the time required for the temperature of the center of the food to be cooled from 10 ° C. to −25 ° C. was measured five times. did. The average time of the five measurement results was obtained, and the performance of the example and the comparative example were compared. The result is shown in FIG. In addition, each rotation speed of the first cooling tank 6 of the example and the stirrer 58 of the comparative example was set to 70 rpm. Further, the temperature of the antifreeze 5 was -30 ° C in each case.
[0062]
As shown in FIG. 4, the average time of the example is 7 minutes and 24 seconds, while the average time of the comparative example is 10 minutes and 58 seconds. That is, the example can reduce the time for cooling the food from 10 ° C. to −25 ° C. by about 30% as compared with the comparative example.
[0063]
The above-described embodiment is an example, and various changes can be made without departing from the spirit of the present invention, and the present invention is not limited to the above-described embodiment.
[0064]
【The invention's effect】
According to the present invention, the entire cooling device can be made compact. Further, the material to be cooled can be cooled in a short time.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams showing a basic configuration example of a cooling device according to a first embodiment of the present invention, wherein FIG. 1A is a schematic longitudinal sectional view, and FIG. is there.
FIGS. 2A and 2B are schematic longitudinal sectional views showing a basic configuration example of a cooling device according to a second embodiment of the present invention, wherein FIG. 2A shows a state at the time of cooling, and FIG. ing.
FIGS. 3A and 3B show a basic configuration example of a second cage body, wherein FIG. 3A is a perspective view and FIG. .
FIG. 4 is a diagram showing the performance of an example and a comparative example.
FIG. 5 is a diagram showing a basic configuration example of a conventional cooling device.
[Explanation of symbols]
1,30 cooling device
2 Outer tank
5 Antifreeze
6 First cooling tank
7 First rotating device
8 First basket
17 1st refrigerant pipe
18 First air bubble mixing prevention device
31 2nd refrigerant tank
32 2nd basket
33 Second rotating device
34 Lifting device
37 Second bubble mixing prevention member
P Cooled body

Claims (8)

An airframe having an opening at the top,
A first cooling tank rotatably mounted in the airframe and containing an antifreeze therein;
A first rotating device built in the body for rotating the first cooling tank,
A first cage body fixed to the body and housed in the first cooling tank, and housing a body to be cooled therein;
A cooling device, comprising: a first refrigerant passage attached to the outside of the first cage for flowing a refrigerant for cooling antifreeze. A first air bubble intrusion preventing member attached to the first car body or the airframe, for preventing air bubbles from being mixed into the antifreeze liquid, so as to be positioned near the level of the antifreeze liquid in the first car body. Is also provided,
2. The cooling device according to claim 1, wherein said first air bubble mixing preventing member is formed in a size to cover a depression of a liquid level of antifreeze generated when the first cooling tank is rotated. A second cooling tank containing an antifreeze therein;
A second refrigerant passage attached to the inner surface of the second cooling tank, for flowing a refrigerant for cooling the antifreeze,
A second cage housing the object to be cooled, housed in the second cooling tank in a state of being rotatably attached to the second cooling tank,
A cooling device, comprising: a second rotating device attached to the second cooling tank and configured to rotate a second cage body. 4. The cooling device according to claim 3, wherein an antifreeze liquid introducing member for introducing antifreeze around the second cage into the second cage is protrudingly provided outside the second cage. 5. Above the second cooling tank, further provided is an elevating device for moving the second cage body in and out of the second cooling tank.
5. The cooling device according to claim 3, wherein the second cage is rotated by the second rotating device in a state where the second cage is extracted from the second cooling tank. 6. A second air bubble mixing preventing member attached to the second cage body for preventing air bubbles from being mixed into the antifreeze liquid is further provided so as to be located near the liquid level of the antifreeze liquid in the second cooling tank. Has been
The second air bubble mixing preventing member according to any one of claims 3 to 5, wherein each of the second air bubble mixing preventing members is formed to have a size to cover a depression of a liquid level of antifreeze generated when the second cage body is rotated. Cooling system. 7. The cooling device according to claim 2, wherein the first or second air bubble mixing prevention member is formed to be vertically movable so that a relative position of the antifreeze to the liquid level can be adjusted. 8. The cooling device according to any one of claims 1 to 7, wherein the first cooling tank and the second cooling tank are formed in a cylindrical shape.

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