JPH1144473A - Cold reserving chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold storage chamber of simple structure, without partial supercooling and can cool a layer uniformly. SOLUTION: The cold storage chamber includes a box main body 1, a storage compartment 2 of objects to be cooled, a dry ice accommodating compartment 3 and a cooling plate 4 structured by thermally insulated material. The cooling plate 4 is arranged along the two side surfaces of inner walls of the storage compartment 2 and cooled by the dry ice D in the dry ice accommodating compartment 3. A thermally insulating material 5 is arranged to the surface of cooling plate 4 for preventing the supercooling directly under the dry ice accommodating compartment 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool box, and more particularly, to a cool box for transporting or storing an object to be cooled while maintaining the temperature in a predetermined temperature range. The present invention relates to an improved cool box that can be cooled more uniformly.

[0002]

2. Description of the Related Art For example, a cold storage box such as a cold roll box is a box for transporting or storing objects to be cooled such as fresh foods. Control the temperature of the cooling material. The basic structure of the cool box is disclosed in the following documents.

[0003] In other words, Japanese Patent Application Laid-Open No. 56-20974 discloses that the interior of a closed container covered with a heat insulating material is divided into an upper dry ice storage chamber and a lower cold storage target storage chamber. There is described a dry ice refrigerator-freezer in which connected vaporized carbon dioxide gas take-out tubes are arranged on the side and back of a lower cooled object storage chamber.

[0004] On the other hand, the present applicant discloses a refrigerator provided with a heat pump for the purpose of controlling the temperature in the refrigerator, in which a refrigerant such as Freon naturally circulates by a change in state. Such refrigerators are disclosed in Japanese Utility Model Laid-Open No.
No. 155875, which is composed of a coolant accommodating chamber (dry ice accommodating chamber) and a refrigerating chamber, and a condensing section of the heat pump is arranged on the coolant accommodating chamber side, and an evaporating section is provided in the refrigerating chamber. It has a structure arranged on the side.

[0005]

In the refrigerators and the like described in the above-mentioned publications, leakage of carbon dioxide gas to the refrigerator compartment (cooled material storage compartment) due to the fact that the inside of the main body is divided into two compartments. However, the vaporized carbon dioxide gas extraction pipe has a long overall length and a complicated arrangement in the refrigerator in order to enhance the cooling effect, and the heat pump requires airtightness in the refrigerant pipe. It has a complicated structure.

In addition, in any of the above structures, there is a problem that it is difficult to uniformly cool the object to be cooled, because the area immediately below the dry ice storage chamber or the area immediately below the heat pump evaporator is supercooled. Such a problem is considered to be caused by the fact that cold air stays in the upper portion of the refrigerator compartment and does not sufficiently circulate, because the refrigerator compartment stores foods and the like in a substantially full state.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a cold storage box which has a simple apparatus configuration and can be cooled more uniformly without partial overcooling. Is to do.

[0008]

SUMMARY OF THE INVENTION The present invention comprises three aspects, the first of which is a cool box for transporting or storing an object to be cooled while maintaining the temperature within a predetermined temperature range. A box main body made of a material, a storage room for an object to be cooled provided inside the box main body, a dry ice storage room provided above the inside of the box main body, and a dry ice storage room. A cooling plate for transmitting the cold heat of the dry ice to the storage room, wherein the cooling plate is integrally formed by a metal plate and is disposed along at least two side surfaces and a ceiling surface of an inner wall of the storage room. And a heat insulating material is provided on the surface of the cooling plate on the storage chamber side corresponding to the bottom of the dry ice storage chamber. It resides in the refrigerator.

A second gist of the present invention is a cool box for transporting or storing an object to be cooled while maintaining the object to be cooled in a predetermined temperature range, wherein the box body is formed of a heat insulating material; A storage room for the object to be cooled provided inside the main body, a dry ice storage room provided above the inside of the box main body, and cold heat of the dry ice stored in the dry ice storage room is transmitted to the storage room. And a cooling plate, which is formed of a metal plate and is disposed along at least two sides of the inner wall of the storage room, and furthermore, the cooling plate of the storage room corresponding to the bottom of the dry ice storage room. The ceiling surface is made of a heat insulating material, and a flow path of cool air communicating with the dry ice storage chamber is provided between the inner wall of the storage chamber and the cooling plate, and a front surface near the dry ice storage chamber is provided. The end portion of the flow path resides in the refrigerator, wherein the opening adjustable damper for regulating the flow rate of the cool air is provided.

A third aspect of the present invention is a cool box for transporting or storing an object to be cooled while maintaining the object in a predetermined temperature range, wherein the box body is made of a heat insulating material, A storage room for the object to be cooled provided inside the main body, a dry ice storage room provided above the inside of the box main body, and cold heat of the dry ice stored in the dry ice storage room is transmitted to the storage room. A cooling plate for storing the dry ice, and the cooling plate is continuously connected to the ceiling component attached to the ceiling of the storage room in a state forming the bottom of the dry ice storage chamber. An inner wall component attached to the inner wall of the room, and a cooling fin projecting toward the storage room is attached to the ceiling component of the cooling plate,
The cooling fin is accommodated in a shielded room arranged in the ceiling component, and the shielded room is configured to be openable and closable with respect to the storage room. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cool box according to the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a structural example of a cool box according to a first aspect of the present invention as viewed from the front side. FIG. 2 is a longitudinal sectional view showing a structural example of the cool box according to the second aspect of the present invention. FIG. 3 is a cutaway view of a main part showing an example of a drive mechanism of a damper in a cool box according to a second aspect of the present invention. FIG. 4 is a longitudinal sectional view showing a structural example of a cool box according to a third aspect of the present invention, as viewed from the front side. FIG. 5 is a cutaway perspective view showing an example of a shielded room in a cool box according to the third aspect of the present invention. FIG. 6 is a cutaway perspective view showing another example of the shielded room in the cool box according to the third aspect of the present invention.

First, a cool box according to the first aspect of the present invention will be described. The cool box of the present invention is a box for transporting or storing an object to be cooled while maintaining the object to be cooled in a predetermined temperature range. As shown in FIG. 1, a box body (1) made of a heat insulating material, and a box A storage room (2) for the object to be cooled provided inside the main body (1), and a box main body (1)
And a dry ice storage chamber (3) provided above the inside of the storage device. Note that reference numeral (9) in the figure denotes a transfer caster attached to the bottom of the box body (1).

The box body (1) is formed as a vertically long box having a rectangular horizontal cross section and has an inner volume of about 100 to 500 liters. As the heat insulating material constituting the box body (1), for example, a foamed resin obtained by foaming a thermoplastic resin such as polyolefin such as polyethylene and polypropylene in addition to polystyrene is used. In particular, from the viewpoint of enhancing heat insulation, a foamed resin having closed cells is preferable. Usually, the thickness of the heat insulating material is about 30 to 80 mm. The box body (1) is covered with a thin plate of aluminum alloy or steel or a resin molded plate such as FRP in order to secure strength.

The interior of the box body (1) is divided into a storage room (2) for the object to be cooled and a dry ice storage room (3) above it. Although not shown, a door is provided at the front of the box body (1) for taking in and out the object to be cooled into and out of the storage room (2), and the dry ice storage room (3) is loaded with dry ice. Door is separately provided. The door of the dry ice storage room (3) may be arranged on the ceiling portion of the box body (1) as shown by the reference numeral (31), but is arranged in parallel with the door of the storage room (2). ) May be arranged on the front side. The volume of the dry ice storage chamber (3) is usually a block of dry ice (D) formed into a cube having a side of about 25 cm or two pieces of dry ice (D) obtained by dividing the cubic dry ice into two equal parts. )
Is set to a volume that can accommodate the In addition, the code | symbol (32) in a figure shows the small hole for gas release provided in the door (31).

In the cool box of the present invention, the cold heat of the dry ice stored in the dry ice storage room (3) is stored in the storage room (2).
And a cooling plate (4) for transmitting the heat to the cooling plate. The cooling plate (4) is integrally formed by a metal plate. Specifically, the cooling plate (4) is made of a thin metal plate such as an aluminum alloy or a copper alloy having a thickness of about 0.1 to 2.0 mm in consideration of heat transfer efficiency and overall weight. Especially,
When used for transporting or storing foods, it is preferable to be made of a material having low corrosion such as an aluminum alloy. Such a cooling plate (4) may be formed by appropriately connecting divided parts as long as it has a continuous structure as a whole.

The cooling plate (4) is used to cool the air in the storage room (2) more uniformly.
Are arranged along at least two sides of the inner wall and the ceiling surface. In the structure illustrated in the figure, the storage room (2) is arranged along both side walls and substantially the entire ceiling. The cooling plate (4) is usually provided with a storage room (2) using an adhesive or the like.
Affixed to the inner wall surface. In addition, the cooling plate (4) forms the bottom of the dry ice storage chamber (3). Thereby, the cooling plate (4) can be directly cooled by the dry ice (D) stored in the dry ice storage chamber (3).

Furthermore, in the cool box of the present invention, the dry ice storage chamber (3) is provided to prevent the object to be cooled in the storage room (2) located immediately below the dry ice storage chamber (3) from being excessively cooled. It is important that a heat insulating material (5) is provided on the surface of the cooling plate (4) on the storage room (2) side corresponding to the bottom of the cooling plate (4). As the heat insulating material (5), a foamed resin sheet made of a thermoplastic resin such as various polyolefins and having a thickness of about 5 to 20 mm is used. It is stuck on the surface of (4).

In the cool box of the present invention, the object to be cooled at a low temperature such as fresh food is stored in the storage room (2).
An appropriate amount of dry ice (D) is stored in the dry ice storage chamber (3) in consideration of the storage amount and the storage time. The cooling plate (4) disposed in the storage room (2) and constituting the bottom of the dry ice storage room (3) is cooled by the dry ice (D) in the dry ice storage room (3), thereby storing the storage room. The air in the storage room (2) is cooled through the plate-shaped portions located on both side walls of (2).

At this time, since the cooling plate (4) is arranged on substantially the entire side wall of the storage room (2), the cold storage of the present invention can store the cooling object even when it is fully loaded. The inside of the chamber (2) can be cooled substantially uniformly. Moreover, the cooling plate (4)
Since the heat insulating material (5) attached to the surface of the above-mentioned member suppresses the transfer of heat immediately below the dry ice storage chamber (3), in the cool box of the present invention, immediately below the dry ice storage chamber (3), The supercooling of the object to be cooled located at the top of the storage room (2) can be effectively prevented. In other words, the cool box of the present invention has a simple device configuration and can cool the object to be cooled more uniformly.

Next, a cool box according to a second aspect of the present invention will be described. A cool box according to a second aspect is shown in FIG. 2 and includes a box body (1) made of a heat insulating material and a storage room (2) for a cooled object provided inside the box body (1). ), The cold heat of the dry ice storage room (3) provided above the inside of the box body (1), and the cold heat of the dry ice (D) stored in the dry ice storage room (3) are transmitted to the storage room (2). And a cooling plate (4) for cooling. Such a configuration is substantially the same as that of the cool box shown in FIG.

The cold storage box shown in FIG. 2 is different from the embodiment shown in FIG. The ceiling surface of the storage room (2), which is formed of a metal plate and is disposed along at least two side surfaces of the inner wall of the storage room (2) and corresponds to the bottom of the dry ice storage room (3), has a heat insulating material (6). ). And, between the inner wall of the storage room (2) and the cooling plate (4), there is provided a flow path (4g) of cool air communicating with the dry ice storage room (3).

As shown in the figure, the cooling plate (4) is integrally formed as shown in FIG. 1 for simplicity of the structure, and is arranged along two sides of the inner wall of the storage room (2) and the ceiling surface. Is done. In this case, since the dry ice (D) does not directly contact the cooling plate (4) and insulates the ceiling surface of the storage room (2), a heat insulating material (60) is provided on the ceiling surface of the storage room (2). )
A heat insulating material (61) is provided at the bottom of the dry ice storage chamber (3). As the heat insulating material (6), FIG.
The same foamed resin sheet as the heat insulating material (5) in the inside is used. In addition, the cooling plate (4) is constituted by two metal plates and is separately arranged on two side surfaces of the inner wall of the storage room (2),
Then, the bottom of the dry ice storage chamber (3) may be separately formed of a heat insulating material.

The cold air flow path (4g) is formed by slightly separating the cooling plate (4) from the inner wall of the storage room (2). Specifically, the flow path (4g) supports the cooling plate (4) by, for example, a plurality of ribs vertically attached to both side walls of the storage room (2), and the cooling plate (4). An opening with the inner wall of the storage chamber (2) on the peripheral side is sealed. A small hole for venting gas is provided at the lower end side of the flow path (4 g). Reference numeral (12) in the drawing indicates a gas vent small hole provided near the bottom of the box body and continuous with the flow path (4g).

In the cool box of the present invention shown in FIG. 2, the flow rate of the cool air, that is, the sublimation speed of the dry ice is regulated to adjust the temperature in the storage room (2). It is important that a damper (7) whose opening degree can be adjusted to regulate the flow rate of the cool air is provided at the end of the flow path (4g) in the vicinity. Although not shown, a damper (7)
Is formed by a plate-like member, the upper edge of which is pivoted to the box body (1) side, and the pivot angle protruding outside the box body (1) is turned to appropriately set the opening angle. Is made.

The damper (7) may be manually operated as described above, but is preferably configured to be automatically opened and closed according to the temperature of the storage room (2), that is. In a preferred embodiment of the cool box, as shown in FIG. 3, a drive mechanism (8) for operating the damper (7) according to the temperature in the storage room (2) is provided. The drive mechanism (8) includes a bias spring (85) that exerts an elastic force in a direction in which the damper (7) closes, and a shape memory alloy spring that exerts a restoring force at a temperature equal to or higher than a predetermined temperature in a direction in which the damper (7) opens. (86).

Specifically, the drive mechanism (8) illustrated in FIG. 3 is a cylinder-type drive mechanism, and includes a cylindrical outer jacket (81) and a coaxial and slidable outer jacket (81). A rod (82) freely inserted and a rod (8)
2) a tension coil spring as a bias spring (85) bridged between the rear end portion and the rear end portion in the jacket (81); a rod (82) wound around the rod; (81) and a coil-shaped shape memory alloy spring (86) bridged with the front end.

The bias spring (85) and the shape memory alloy spring (86) are connected in series in such a state that the rod (82) can be provided with an elastic force in a direction to retract the rod and a contraction restoring force in a direction to project the rod. Are arranged in a way. And
The mantle (81) of the drive mechanism (8) is pivotally supported by a support member (80) provided on the storage chamber (2) side, and the tip of the rod (82) is pivotally supported by the side edge of the damper (7). Is done. The support member (80) is attached to, for example, a metal plate forming a part of the cooling plate (4), and the rod (82) is connected to a part of the cooling plate (4) and the heat insulating material (60). Through the channel (4
g) side. That is, by disposing the main body of the drive mechanism (8) on the storage room (2) side, the shape memory alloy spring (86) can detect the temperature on the storage room (2) side. In addition, as shown by a chain line in FIG.
The cooling plate (4) through which the rod (82) penetrates and the heat insulating material (6)
The hole 0) is sealed with a flexible airtight sheet (87) in order to prevent the vaporized gas from leaking into the storage room (2).

The shape memory alloy spring (86) used for the drive mechanism (8) is a spring formed of a so-called shape memory alloy containing Ti-Ni or Cu-Zn-Al as a main component. The composition of the shape memory alloy spring (86) is set in advance so that the temperature at which a phase change occurs is slightly lower than the predetermined room temperature so as to be in a steady state at a predetermined temperature (control temperature). It is set and formed into a coil at a temperature higher than a predetermined temperature. Such a shape memory alloy spring (8
6) can be formed relatively small since an elastic modulus of about 10 times is obtained as compared with a normal metal spring. The shape memory alloy spring (86) can be set so that it can be restored at a desired temperature. However, generally, the shape memory alloy spring (86) is restored at a specific temperature within the range of -5 to 10 ° C based on the control temperature of the object to be cooled. It is designed to do.

Further, the driving mechanism (8) includes a rod (82)
The temperature may be set so that the operating temperature of the device can be appropriately set. For example, the temperature setting mechanism in the drive mechanism (8) is inserted into the rear end side of the jacket (81) and the piece (8) to which the rear end of the bias spring (85) is attached.
3). The piece (83) is the mantle (81)
Has a rotatable screw portion (84) screwed to the rear end portion,
The position is set by adjusting the amount of protrusion of the screw portion (84). As a result, the strength of the bias spring (85) is adjusted, and the balance with the shape memory alloy spring (86) is set.

In the cool box according to the second aspect, the cooling plate (4) is cooled by the vaporized gas of the dry ice (D) stored in the dry ice storage chamber (3). That is, the flow path (4g) provided between the inner wall of the storage room (2) and the cooling plate (4) is connected to the dry ice (D) from the dry ice storage chamber (3) to the outer peripheral side of the cooling plate (4).
Is allowed to flow down, and the entire cooling plate (4) is cooled by the cool air. Then, the cooling plate (4) arranged on substantially the entire side wall of the storage room (2) cools the inside of the storage room (2) substantially uniformly. Also, as above,
In the cool box of the present invention, the heat insulating material (6) on the ceiling surface suppresses the transfer of heat immediately below the dry ice storage chamber (3). The supercooling of the object can be effectively prevented. That is, similarly to the above, the cool box of the present invention has a simple device configuration and can cool the object to be cooled more uniformly.

In addition, in the above cool box, the channel (4)
g) an adjustable damper provided at the end of (g)
Regulates the flow rate of the cool air by setting this to an appropriate opening angle. As a result, in the cool box of the present invention, an excessive decrease in the temperature of the cooling plate (4) can be suppressed, and the temperature in the storage room (2) can be adjusted to a certain range.

In particular, in a cool box provided with a drive mechanism (8), the shape memory alloy spring (86) exhibits elasticity at a preset temperature in response to the temperature of the storage room (2), Since the damper (7) is opened and closed in cooperation with the bias spring (85), the temperature in the storage chamber (2) can be more reliably adjusted to a certain range. Further, when the drive mechanism (8) is configured to be able to set the temperature, the temperature of the storage room (2) can be changed according to the condition of the object to be cooled. Then, the cool box shown in FIG. 2 is adjusted by adjusting the opening degree of the damper (7).
Since it is possible to prevent useless sublimation of dry ice, for example,
It is particularly suitable for controlling the temperature at about -5 to 10 ° C for a long time.

Next, a cool box according to a third aspect of the present invention will be described. As shown in FIG. 4, the cool box according to the third aspect is a box body (1) made of a heat insulating material, and a storage room (2) for a cooled object provided inside the box body (1). And transmitting the cold heat of the dry ice storage room (3) provided above the inside of the box body (1) and the dry ice (D) stored in the dry ice storage room (3) to the storage room (2). Cooling plate (4). Such a configuration is substantially the same as that of the cool box shown in FIG. 1, and the dry ice storage chamber (3) includes a door (31) having a small hole (32) for degassing. The cooling plate (4) includes a ceiling component (4a) affixed to the ceiling of the storage room (2) so as to form the bottom of the dry ice storage room (3), and a ceiling component (4a). ), Inner wall components (4b) attached to the left and right inner walls of the storage room (2).
And

The cooling box shown in FIG. 4 is different from that shown in FIG. 1 in that a cooling fin (10) projecting toward the storage room (2) is provided on the ceiling component (4a) of the cooling plate (4). Is attached. Further, the cooling fin (10) is provided on the ceiling component (4a).
Is housed in a shielded room (11) arranged in the room. And this shielding room (11) is comprised so that opening and closing with respect to the storage room (2) is possible.

The cooling fin (10) is made of an L-shaped plate made of an aluminum alloy or a copper alloy, and its base end is fixed to the ceiling component (4a) by an adhesive or spot welding (see FIG. 5). ). The number of cooling fins (10) is set to, for example, about 4 to 30 in accordance with a target temperature in the storage room (2). Cooling fins (1
Specific dimensions of 0) are, for example, a thickness of 0.2 mm and a width of 4 mm.
The length is about 0 mm and the length is about 300 mm.

As shown in FIGS. 4 and 5, the shielding room (11) has a support frame (12) fixed to the ceiling component (4a) of the cooling plate (4) and a support frame (12). Four heat-insulating side plates (13) that are attached to form a wall of the shielded room (11), and one sheet that is detachably locked to the support frame (12) to form the bottom of the shielded room (11). Insulated bottom plate (14).

The support frame (12) is made of a plate material having an irregular cross section of an aluminum alloy or a copper alloy. The lower end of the support frame (12) is an upper and lower two-stage latch for detachably retaining the peripheral edge of the heat insulating bottom plate (14). A groove is formed. That is, the locking structure of the heat insulating bottom plate (14) in the support frame (12) is as follows.
As shown in FIG. 4, in a state where the heat insulating bottom plate (14) is locked in the upper locking groove, the shield chamber (11) and the storage chamber (2) are configured to be partitioned. As shown, in a state where the heat insulating bottom plate (14) is locked in the lower locking groove,
The shielding room (11) and the storage room (2) are configured to be continuous. As the heat-insulating side plate (13) and the heat-insulating bottom plate (14), foamed resin sheets made of a thermoplastic resin such as various polyolefins and having a thickness of about 5 to 20 mm are used.

In the cool box according to the third aspect, when the dry ice (D) is stored in the dry ice storage chamber (3), the ceiling component (4a) of the cooling plate (4) constituting the bottom thereof is formed. ) Is cooled directly by dry ice (D).
The inner wall component (4b) of the cooling plate (4) that is continuous with the ceiling component (4a) has a storage room (2) similar to the above-described embodiment.
Cool the inside uniformly. Each cooling fin (10) protruding from the ceiling component (4a) cools the inside of the shielded room (11). At that time, the shielding room (11) arranged below the dry ice storage room (3) is a dry ice storage room (3).
Prevents partial supercooling just below the

In addition, the structure in which the shielded room (11) can be opened and closed is changed in the shielded room (11) with respect to the storage room (2) by changing the locking position of the heat insulating bottom plate (14). The air can be sufficiently supplied as required, and the flow rate is regulated as required. As a result, the temperature of the storage room (2) can be adjusted according to the outside air temperature. For example, even when the outside air temperature is 35 ° C, the inside of the storage room (2) can be maintained in the range of −10 ° C. to + 10 ° C. That is, according to the cool box of the present invention, it is possible to effectively prevent supercooling immediately below the dry ice storage room (3) and to adjust the temperature in the storage room (2) over a wide range.

Further, in the above cool box, as shown in FIG. 6, a heat insulating cover (15) is attached to and detached from the cooling fin (10) projecting from the ceiling component (4a) of the cooling plate (4). It may be mounted freely. The insulation cover (15)
It is made of a block material of a thermoplastic resin such as various polyolefins, and is mounted with a cooling fin (10) sandwiched in a slit formed on the upper surface thereof. Insulation cover (1
5) is mounted for setting the effective number of cooling fins (10) according to the target temperature in the storage room (2), and the cooling fin (10) provided with the heat insulating cover (15) has its cooling capacity. Is suppressed.

In the cool box according to the third aspect, the gap between the heat insulating bottom plate (14) of the shielded room (11) and each heat insulating side plate (13) is continuously increased and decreased. ) May be connected to the support frame (12) via a holding member made of a shape memory alloy. The holding member made of a shape memory alloy exerts a restoring force when the temperature in the storage chamber (2) rises above a predetermined temperature, and increases the gap between the heat insulating side plate (13) and the heat insulating bottom plate (14). Then, the cool air in the shielding room (11) flows down to the storage room (2), and the temperature in the storage room (2) is lowered. As described above, when the heat insulating bottom plate (14) is attached by the holding member made of the shape memory alloy, the temperature of the storage room (2) can be adjusted with higher accuracy.

[0042]

According to the cool box of the present invention, since the cooling plate is arranged on substantially the entire side wall of the storage room, the storage room is cooled substantially uniformly even when the object to be cooled is fully loaded. it can. In addition, according to the cold storage according to the first aspect, the heat insulating material attached to the surface of the cooling plate suppresses the transfer of heat immediately below the dry ice storage chamber, and thus is located immediately below the dry ice storage chamber. Supercooling of the object to be cooled can be effectively prevented.

According to the cool box according to the second aspect of the present invention, in addition to the above-described effects, the damper whose opening can be adjusted regulates the flow rate of cool air, thereby suppressing an excessive temperature drop of the cooling plate. The temperature in the storage room can be adjusted to a certain range.

Further, according to the cool box according to the third aspect of the present invention, since the cooling fins are protruded from the ceiling component of the cooling plate and the shielding room for accommodating the cooling fins is provided, the cooling room is provided in the storage room. On the other hand, while being able to supply sufficient cold air as needed,
It is possible to effectively prevent supercooling immediately below the dry ice storage room, and to control the temperature in the storage room over a wide range.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a structural example of a cool box according to a first aspect of the present invention as viewed from the front side.

FIG. 2 is a longitudinal sectional view showing a structural example of a cool box according to a second aspect of the present invention as viewed from the front side.

FIG. 3 is a cutaway view showing a drive mechanism of a damper in a cool box according to a second aspect of the present invention.

FIG. 4 is a longitudinal sectional view showing a structural example of a cool box according to a third aspect of the present invention as viewed from the front side.

FIG. 5 is a cutaway perspective view showing an example of a shielded room in a cool box according to the third aspect of the present invention.

FIG. 6 is a cutaway perspective view showing another example of the shielded room in the cool box according to the third aspect of the present invention.

[Explanation of symbols]

 1: box body 2: storage room 3: dry ice storage room 4: cooling plate 4a: ceiling component 4b: inner wall component 4g: flow path 5: heat insulating material 6: heat insulating material 7: damper 8: drive mechanism 85: bias Spring 86: Shape memory alloy spring 9: Caster 10: Cooling fin 11: Shielding room 12: Support frame 13: Insulated side plate 14: Insulated bottom plate 15: Insulated cover D: Dry ice

Claims (5)

[Claims] An insulated box for transporting or storing an object to be cooled while maintaining the object to be cooled in a predetermined temperature range, comprising: a box body made of a heat insulating material; and a cooled object provided inside the box body. A storage room for goods, a dry ice storage room provided above the inside of the box body, and a cooling plate for transmitting cold heat of dry ice stored in the dry ice storage room to the storage room, The cooling plate is
It is integrally formed by a metal plate and is disposed along at least two side surfaces and a ceiling surface of the inner wall of the storage room, and forms a bottom portion of the dry ice storage room.
A cool box, wherein a heat insulating material is provided on a surface of the cooling plate on a storage room side corresponding to a bottom of the dry ice storage room. 2. A cool box for transporting or storing an object to be cooled while maintaining the object to be cooled in a predetermined temperature range, comprising: a box body made of a heat insulating material; and a cooled object provided inside the box body. A storage room for goods, a dry ice storage room provided above the inside of the box body, and a cooling plate for transmitting cold heat of dry ice stored in the dry ice storage room to the storage room, The cooling plate is
The storage room is configured by a metal plate and disposed along at least two side surfaces of the inner wall of the storage room, and the ceiling surface of the storage room corresponding to the bottom of the dry ice storage room is formed of a heat insulating material. Between the inner wall of the chamber and the cooling plate, there is provided a flow path for cool air communicating with the dry ice storage chamber, and at the end of the flow path near the dry ice storage chamber, an opening degree that regulates the flow rate of cool air is adjustable. Cold storage characterized by having a special damper. 3. A drive mechanism for operating the damper, wherein the drive mechanism exerts an elastic force in a direction in which the damper closes, and exerts a restoring force at a temperature equal to or higher than a predetermined temperature in a direction in which the damper opens. 3. The cool box according to claim 2, wherein the cool box is configured by combining with a shape memory alloy spring. 4. A cool box for transporting or storing an object to be cooled while maintaining it in a predetermined temperature range, comprising: a box body made of a heat insulating material; and a cooled object provided inside the box body. A storage room for goods, a dry ice storage room provided above the inside of the box main body, and a cooling plate for transmitting cold heat of dry ice stored in the dry ice storage room to the storage room, The cooling plate is
A ceiling component affixed to the ceiling of the storage room in a state forming the bottom of the dry ice storage room, and an inner wall component affixed to the inner wall of the storage room continuously to the ceiling component. A cooling fin protruding toward the storage room side is attached to the ceiling component of the cooling plate, and the cooling fin is accommodated in a shielding room arranged in the ceiling component, and
The cold storage, wherein the shielding room is configured to be openable and closable with respect to the storage room. 5. The cool box according to claim 4, wherein a heat insulating cover is detachably attached to the cooling fins.