WO2016117141A1

WO2016117141A1 - Cooler box

Info

Publication number: WO2016117141A1
Application number: PCT/JP2015/064313
Authority: WO
Inventors: 邦夫大澤
Original assignee: 株式会社中温
Priority date: 2015-01-23
Filing date: 2015-05-19
Publication date: 2016-07-28
Also published as: KR20170103831A; CN107250691B; CN107250691A; TWI654401B; JPWO2016117141A1; JP6198975B2; KR102292586B1; TW201627622A

Abstract

The purpose of the present invention is to provide a cooler box capable of easily preserving items to be cooled at temperatures below 0°C without freezing said items. The cooler box (1) in the present invention is provided with at least a housing that has a storage space (S) for the items to be cooled in the interior, wherein a portion (back surface wall (2b)) of walls that form the outer form of the housing is provided with an outer wall (3), a thermally conductive inner wall (4) facing the storage space (S) and a thermally conductive partition wall (5) provided between the outer wall (3) and the inner wall (4). A first tank (T1) is formed between the inner wall (4) and the partition wall (5) to contain a brine solution (L1) that does not freeze at 0°C and a second tank (T2) is formed between the outer wall (3) and the partition wall (5) to contain a liquid (L2). A cooling means (6) is provided in the second tank (T2) to cool the contained liquid (L2) to below 0°C.

Description

Cold storage

The present invention relates to a refrigerator that can store an object to be cooled at a temperature lower than 0 ° C. without being frozen.

For example, foods such as fresh vegetables, fish and shellfish that require ripening, livestock and the like, as well as cold objects such as organs, organs, and blood for transplantation are cooled to a temperature of less than 0 ° C. It is known that the quality retention time can be extended, and that time is extended logarithmically as the temperature decreases. However, if an attempt is made to keep the cold insulation temperature close to the freezing temperature by electrical control, the temperature becomes unstable, the structure of the cold object freezes and is damaged, the quality is significantly reduced, and the cold object becomes unusable. There was a risk of becoming. Further, in order to keep the temperature constant at the freezing limit temperature by electrical control, there is a disadvantage that the electrical control device becomes expensive because high-precision control is required. For this reason, in order to prevent freezing, a method of setting a cool temperature higher than the freezing limit temperature has been common.

On the other hand, Patent Document 1 discloses a method of immersing and storing fresh food in storage water at -2 ° C to 0 ° C. Patent Document 2 discloses a method for preserving fresh food by cooling with ultra-low temperature water maintained in an unfrozen state at 0 ° C. or lower.

However, in the invention described in Patent Document 1, since the object to be stored is wet, there is a problem that it takes time to remove moisture after storage. Moreover, in the invention described in patent document 2, there exists a malfunction that the temperature becomes too low and the freshness of fresh food falls.

JP 60-49740 A JP-A-8-116869

The inventor invented the cool box according to the present invention as a means for easily solving this problem.

The object of the present invention is to provide a cool box that can be easily stored without freezing the object to be cooled below 0 ° C.

The cold storage according to the present invention is a cold storage having at least a housing having a storage space for a cold object inside, and a part of a wall forming the outer shape of the housing includes an outer wall and the storage space. An inner wall having thermal conductivity facing each other and a partition wall having thermal conductivity provided between the outer wall and the inner wall, and a brine solution that does not freeze at 0 ° C. is accommodated between the inner wall and the partition wall. A second tank for storing liquid between the outer wall and the partition wall, and cooling for cooling the stored liquid below 0 ° C. in the second tank. Means are provided.

In the cool box according to the present invention, it is preferable that the cooling means freezes the liquid.

In the cool box according to the present invention, the liquid may be a liquid that does not freeze at 0 ° C., and the cooling means may be configured not to freeze the liquid.

The cool box according to the present invention is formed of a material selected from cold-resistant rubber, plastics, foamed resins, ceramics, and glass, and materials coated with copper, titanium, stainless steel, aluminum, and aluminum alloy. Or a multilayer structure having an air layer inside.

In the cool box according to the present invention, the outer wall of the housing includes a front wall, a back wall, a top wall, a bottom wall, a right side wall, and a left side wall, and the front wall, the back wall, the top wall, It is preferable that at least one of the bottom wall, the right side wall, and the left side wall includes the outer wall, the inner wall, and the partition wall.

In the cool box according to the present invention, the freezing temperature of the liquid is preferably higher than the freezing temperature of the brine solution.

In the cool box according to the present invention, it is preferable that the second tank has a shape in which at least a portion including the upper end gradually widens upward.

The cool box according to the present invention preferably further includes a thermometer that measures the temperature of the brine solution, and a control unit that controls cooling of the liquid by the cooling unit based on the temperature.

In the cool box according to the present invention, it is preferable that the material, thickness, and heat transfer area of the partition wall are set so that the brine solution is not completely frozen.

The cool box according to the present invention is provided in the casing, and includes a fin coil device having a plurality of plate-like fins and a heat exchange pipe penetrating the plate-like fins, and connecting the heat exchange pipe to the first tank. It is preferable to further include a pipe for circulating the brine solution in the heat exchange pipe.

It is preferable that the cool box according to the present invention further includes air blowing means for blowing air in the storage space between the plate fins.

It is preferable that the cool box according to the present invention further includes a plate facing the inner surface of the casing, and the fin coil device is provided between the inner surface and the plate.

In the cool box according to the present invention, it is preferable that a slit is formed in the plate.

According to the present invention, it is possible to provide a refrigerator that can easily store an object to be cooled at less than 0 ° C. without being frozen.

It is a perspective view of the cool box which concerns on one Embodiment of this invention. FIG. 2 is a cross-sectional view (vertical cross-sectional view) taken along line AA of FIG. In FIG. 2, the caster 9 is not shown. FIG. 2 is a cross-sectional view (cross-sectional view) taken along line BB in FIG. It is a cross-sectional view which shows the modification of the cooling holding structure of the wall of a cool box. It is a longitudinal cross-sectional view which shows the modification of the cooling holding structure of the wall of a cool box. In FIG. 5, the caster 9 is not shown. It is a perspective view of the cool box which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view of the cool box which concerns on further another embodiment of this invention. FIG. 8 is a CC cross-sectional view (transverse cross-sectional view) of FIG. 7. It is a longitudinal cross-sectional view which shows the modification of the cool box of FIG. FIG. 10 is a cross-sectional view (cross-sectional view) taken along the line CC of FIG. 9. It is a schematic sectional drawing of a cold storage vehicle provided with the cold storage which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this invention is not limited to the following embodiment.

FIG. 1 shows the external appearance of the cool box 1 according to an embodiment of the present invention, and FIGS. 2 and 3 show the internal structure of the cool box 1.

The cold storage 1 includes at least a housing 2 having a storage space S for the object to be cooled inside. Although the shape of the housing | casing 2 is not specifically limited, In this embodiment, it is a rectangular parallelepiped, and the inner side of the wall which makes the external shape of the housing | casing 2 is the storage space S. The storage space S may be provided with multistage shelves in order to increase the storage capacity, and the size of the storage space S with respect to the housing 2 is not particularly limited. The object to be stored in the storage space S is kept at a temperature lower than 0 ° C. and stored without freezing, and the quality can be maintained for a long time, for example, fresh vegetables, seafood, livestock, etc. Examples include food, organs and organs for transplantation, and blood. Moreover, the refrigerator 1 which supplies a refrigerant | coolant to the cooling means 6 mentioned later is provided in the cold storage 1 on the housing | casing 2, and the temperature which measures the temperature of the brine solution L1 accommodated in the 1st tank T1 A total of 8 are provided. The brine solution is an antifreeze solution having a freezing point of less than 0 ° C.

The outer wall of the housing 2 includes a front wall 2a and a back wall 2b facing each other, a top wall 2c and a bottom wall 2d facing each other, and a right side wall 2e and a left side wall 2f facing each other. Four casters 9 are attached to the bottom wall 2d, and the cool box 1 can be self-propelled. The front wall 2a is a door for opening the storage space S, and is attached to the left side wall 2f so as to be openable and closable by known means, although not shown. A handle 10 for opening and closing is provided on the outer surface of the front wall 2a.

A part of the wall forming the outer shape of the housing 2 has a cooling and holding structure for cooling and holding the inside of the storage space S to a temperature of less than 0 ° C. In the present embodiment, the back wall 2b, the right side wall 2e, and the left side wall 2f among the walls forming the outer shape of the housing 2 have a cooling holding structure. For the front wall 2a, the top wall 2c, and the bottom wall 2d, in this embodiment, for example, a heat insulating aluminum coating foamed resin, a foamed resin such as foamed polystyrene, a fiber reinforced plastic (FRP), or a heat insulating wall with an internal vacuum However, a wall structure having a cooling holding structure may be used similarly to the back wall 2b, the right side wall 2e, and the left side wall 2f.

As shown in FIGS. 2 and 3, the back wall 2b, the right side wall 2e and the left side wall 2f having the cooling holding structure are respectively an outer wall 3, an inner wall 4 having thermal conductivity facing the storage space S, and an outer wall. 3 and the partition wall 5 having thermal conductivity provided between the inner wall 4 and the inner wall 4. A first tank T1 is provided between the inner wall 4 and the partition wall 5 to store a brine solution L1 that is not frozen at 0 ° C., and a second tank T2 is stored between the outer wall 3 and the partition wall 5 to store a liquid L2. There is no. The 2nd tank T2 is provided with the cooling means 6 for cooling the accommodated liquid L2 to less than 0 degreeC.

Further, the

walls

2b, 2e and 2f having the cooling holding structure are provided with a waterproof wall 3a on the inner surface of the outer wall 3 and at the positions corresponding to the bottoms of the first tank T1 and the second tank T2 on the upper surface of the bottom wall 2d. A waterproof wall 3b is lined.

As shown in FIG. 3, in this embodiment, the outer wall 3 is common to the back wall 2b, the right side wall 2e, and the left side wall 2f, and a flat plate bent in a U shape is used. A combination of three flat plates in a U shape may be used as the outer wall 3. Similarly, the waterproof wall 3a, the partition wall 5, and the inner wall 4 are formed by bending flat plates into a U shape, but may be a combination of three flat plates in a U shape. The outer peripheral surface of the waterproof wall 3 a is affixed to the inner peripheral surface of the outer wall 3. The partition wall 5 is slightly smaller than the outer wall 3 and is disposed inside the outer wall 3. The inner wall 4 is slightly smaller than the partition wall 5 and is disposed inside the partition wall 5. The cooling means 6 is slightly smaller than the outer wall 3 and is disposed between the waterproof wall 3 a and the partition wall 5. Furthermore, the waterproof wall 3c for preventing the liquid etc. in the 1st tank T1 and the 2nd tank T2 from leaking in the edge part of the waterproof wall 3a, the partition 5, and the inner wall 4 is provided.

As a method of forming the first tank T1 and the second tank T2, a U-shaped tank composed of the inner wall 4 and the

waterproof walls

3a, 3b, 3c is formed, and then the partition wall 5 is formed between the inner wall 4 and the waterproof wall 3a. May be arranged. Alternatively, a U-shaped first tank T1 including the inner wall 4 and the partition wall 5 and a U-shaped second tank T2 that is slightly larger than the first tank T1 including the partition wall 5 and the waterproof wall 3a are separately prepared in advance. Then, the first tank T1 may be fitted into the second tank T2, and the two may be bonded together. In this case, the partition wall 5 has a two-layer structure.

Further, as shown in FIG. 4, the

walls

2b, 2e and 2f having the cooling and holding structure are provided with an L-shaped or U-shaped waterproof wall 3a, a flat waterproof wall 3b, a flat plate on the individual outer walls 3. The partition wall 5 and the inner wall 4, the right side wall 2e, and the left side wall 2f can be configured by pasting together a panel in which the waterproof wall 3c is integrated into a U shape.

In this embodiment, the outer wall 3, the inner wall 4 and the partition wall 5 are all provided perpendicular to the bottom wall 2d, but the angle of the outer wall 3, the inner wall 4 and the partition wall 5 with respect to the bottom wall 2d is 90 °. It is not limited to.

The outer wall 3 is preferably formed of a heat-insulating material so that heat of the outside air is not transmitted to the inside of the housing 2. Examples of such a material include a heat-shielding aluminum coating foamed resin, a foamed resin such as foamed polystyrene, fiber reinforced plastic (FRP), and a heat insulating wall whose inside is evacuated.

The inner wall 4 is preferably formed of a material having a high heat transfer coefficient. Examples of such materials include copper, titanium, stainless steel, aluminum, and aluminum alloy.

Although the heat transfer coefficient of the partition wall 5 is not particularly limited, in the present embodiment, it is formed of a material having a high heat transfer coefficient, and can be formed of a material such as copper, titanium, stainless steel, aluminum, or an aluminum alloy. The partition wall 5 may have a single layer structure or a multilayer structure.

The brine solution L1 accommodated in the first tank T is an aqueous solution that does not freeze at 0 ° C. but freezes at a predetermined temperature below 0 ° C. The freezing temperature of the brine solution L1 may be equal to or lower than the set cool temperature of the storage object, that is, the set temperature of the storage space S. In this embodiment, the brine solution L1 is an aqueous solution that freezes at a temperature of less than 0 ° C. to −5 ° C., and for example, an aqueous solution in which an organic solvent such as a salt, organic acid salt, saccharide, or alcohol is dissolved can be used. . The solute of the brine solution L1 is not particularly limited as long as it lowers the freezing point of water, but is preferably one that does not adversely affect the human body. For example, salt, alcohol, sucrose, etc. can be used. The freezing temperature of the brine solution L1 can be set to a desired temperature by adjusting the solute concentration.

When the brine solution L1 is an aqueous salt solution, the salts used for the solute are not particularly limited as long as they are salts that are harmless to the human body, such as sodium chloride, calcium chloride, phosphate, sulfite, and the like. The salt concentration of the brine solution L1 is not particularly limited as long as the freezing temperature of the brine solution L1 is equal to or lower than the set temperature of the storage space S. In this embodiment, for example, the salt concentration when the brine solution L1 is ethanol is used. Is 2.3 wt% (freezing point−0.1 ° C.) to 12.9 wt% (freezing point−5.0 ° C.).

As shown in FIG. 2, the inlet 11 is provided in the upper part of the first tank T1, and the outlet 12 is provided in the lower part. In this embodiment, since the brine solution L1 is not frozen, the first tank T may be filled with the brine solution L1.

The liquid L2 stored in the second tank T2 is not particularly limited, and may be the same as or different from the brine solution L1. In the present embodiment, a liquid having a freezing temperature higher than that of the brine solution L1 is used as the liquid L2. More specifically, the freezing temperature of the liquid L2 is preferably higher than the set temperature of the storage space S and less than 0 ° C.

In this embodiment, when the set temperature of the storage space S is −1.0 ° C., as the liquid L2, a solution in which an antibacterial agent or a bactericidal agent is dissolved in a frozen liquid that is as close to pure water as possible to be frozen at 0 ° C. is used. The freezing temperature of the liquid L2 is higher than the set temperature of the storage space S, for example, −0.5 ° C. Further, the growth of microorganisms in the liquid L2 can be suppressed by the antibacterial agent or the bactericidal agent.

A maintenance inlet 13 and outlet 14 are provided at the upper and lower parts of the second tank T2, respectively. Since the volume of the liquid L2 increases when frozen, the amount of the liquid L2 is preferably smaller than the capacity of the second tank T2. Normally, the liquid L2 stored in the second tank T2 is not exchanged.

The cooling means 6 is not particularly limited as long as it has a function of cooling and freezing the liquid L2. For example, the cooling means 6 may have a configuration including a refrigerant coil through which a refrigerant flows and a heat transfer panel formed so as to cover the periphery of the refrigerant coil. A plurality of protrusions may be formed on the surface of the heat transfer panel. The material of the refrigerant coil and the heat transfer panel is not particularly limited, but a material having a high heat transfer property is preferable. As such a material, titanium, copper, stainless steel, aluminum, and alloys thereof can be used. Further, a corrosion-preventing paint or resin may be formed on the surface of the heat transfer panel.

The refrigerator 7 is connected to the refrigerant coil of the cooling means 6 through the refrigerant pipe 7a. The refrigerant pipe 7a is covered with a heat insulating material, and by supplying the refrigerant from the refrigerator 7 to the refrigerant coil, the refrigerant flows into the refrigerant coil and the surface temperature of the heat transfer panel is lowered. Thereby, the liquid L2 can be frozen. In addition, the installation position of the refrigerator 7 is not specifically limited, For example, you may attach to the outer surface of the back wall 2b of the housing | casing 2, the right side wall 2e, or the left side wall 2f.

The thermometer 8 has a main body provided in the storage space S, and the tip of a sensor for detecting temperature passes through the inner wall 4 and reaches the first tank T1. Thereby, the thermometer 8 can measure the temperature of the brine solution L1. The installation position of the main body of the thermometer 8 is not particularly limited.

A controller (control means) for controlling the operation of the refrigerator 7 is built in the refrigerator 7. In this embodiment, the thermometer 8 can transmit the measured temperature of the brine solution L1 to the controller by wired or wireless communication (wireless communication in FIG. 2) from the main body, and the controller is based on the temperature, The operating state of the refrigerator 7, that is, cooling of the liquid L2 by the cooling means 6 is controlled.

A description will be given of a method for storing the objects to be stored in the cold storage 1 in the above manner. In the following, it is assumed that the set cold storage temperature of the storage object is −1.0 ° C. The freezing temperature of the brine solution L1 is less than −1.0 ° C., and the freezing temperature of the liquid L2 is −0.5 ° C. The freezing temperature of the liquid L2 is not particularly limited as long as it is less than 0 ° C.

First, in a state where the brine solution L1 is stored in the first tank T1 and the liquid L2 is stored in the second tank T2, the objects to be stored are stored in the storage space S, and the front wall 2a that is a door is closed.

Subsequently, the refrigerator 7 is operated and the refrigerant is supplied to the refrigerant coil of the cooling means 6. Thereby, the liquid L2 is cooled to less than 0 ° C., and the liquid L2 is gradually frozen. Along with the cooling of the liquid L2, heat exchange is performed between the liquid L2 and the brine solution L1 via the partition wall 5, and the brine solution L1 is cooled to less than 0 ° C.

After that, when the temperature of the brine solution L1 measured by the thermometer 8 reaches −1.0 ° C., which is the set cold insulation temperature of the storage object, the controller of the refrigerator 7 stops supplying the refrigerant from the refrigerator 7 Let Thereby, cooling of the liquid L2 by the cooling means 6 stops.

Since the inner wall 4 is formed of a material having a high heat transfer coefficient, heat is quickly exchanged between the brine solution L1 and the air in the storage space S, and the temperature in the storage space S is the temperature of the brine solution L1. Is almost equal to As a result, the temperature in the storage space S becomes −1.0 ° C.

Thereafter, when the temperature of the brine solution L1 rises, for example, to −0.5 ° C., the controller of the refrigerator 7 operates the refrigerator 7 and restarts the cooling of the liquid L2 by the cooling means 6. Thereafter, when the temperature of the brine solution L1 becomes −1.0 ° C., the controller of the refrigerator 7 stops the refrigerator 7. Thereafter, the refrigerator 7 repeats the operation cycle of the refrigerator 7 based on the temperature of the brine solution L1.

Thus, in this embodiment, the inside of the storage space S is cooled by the brine solution L1 cooled to a desired temperature of less than 0 ° C. In addition, since the brine solution L1 has less temperature unevenness than the air in the storage space S with temperature unevenness depending on the position, the temperature of the brine solution L1 is accurately adjusted to an arbitrary temperature not lower than the freezing temperature and lower than 0 ° C. Can do. Therefore, the object to be cooled can be easily stored without being frozen at less than 0 ° C.

Here, the freezing temperature of the liquid L2 is −0.5 ° C. higher than −1.0 ° C. Therefore, when the temperature of the brine solution L1 becomes −1.0 ° C. and the cooling of the liquid L2 is stopped, the liquid L2 in the second tank T2 is also cooled to about −1.0 ° C. It has become. Here, in order for the frozen body to thaw and become the liquid L2, a lot of heat energy called latent heat is required. Therefore, even if the cooling of the liquid L2 is stopped, it takes time until the frozen body is completely dissolved, and the temperature rise of the brine solution L1 can be suppressed until the frozen body is dissolved. Furthermore, the frozen body has an effect of blocking heat entering from outside air. Therefore, compared with the case where the brine solution L1 is cooled without freezing the liquid L2, the temperature in the brine solution L1 and the storage space S can be kept low for a long time even after the power supply to the cool box 1 is stopped. In addition, the cold storage 1 can be transported for a long time.

In the present embodiment, the liquid L2 in the second tank T2 is cooled to about −1.0 ° C., which is the set cold temperature of the object to be stored, but the cooling temperature of the liquid L2 may be further reduced ( For example, −10 ° C.). Thereby, after the supply of power to the cool box 1 is stopped, the time until the frozen body in the second tank T2 is thawed to become the liquid L2 is further increased, so that the cool keeping duration can be extended. In this case, it is preferable to form the partition wall 5 with a material that can adjust heat transfer so that the brine solution L1 does not freeze. As such materials, for example, cold resistant rubber, plastics, foamed resins, ceramics, glass, and the like, and materials obtained by coating them with copper, titanium, stainless steel, aluminum, aluminum alloy, or the like can be used. Further, the partition wall 5 may be covered with a material having a high heat transfer property, and the heat transfer area of the partition wall 5 may be adjusted to be small. Further, in order to reduce the heat transfer property of the partition walls 5, the partition walls 5 may have a multilayer structure having an air layer inside, such as pair glass. Thus, by setting (controlling) the material, thickness, and heat transfer area of the partition wall 5, the heat transfer rate of the partition wall 5 is adjusted, the cold storage capacity of the frozen body is increased, and the brine solution L1 is completely Can be kept from freezing.

In addition, since the volume of the liquid L2 increases due to freezing, high pressure is likely to be applied to the outer wall 3 and the partition wall 5 forming the second tank T2. Therefore, in the cool box 1, it is preferable to form the part which contacts the 2nd tank T2 of the outer wall 3 with a flexible material. Thereby, even if the liquid L2 freezes, it can deform | transform so that the 2nd tank T2 may protrude on the outer wall 3, and the failure | damage of the 2nd tank T2 can be prevented. Alternatively, even when the partition wall 5 is formed of a flexible material, the partition wall 5 is deformed to the first tank T1 side when the liquid L2 is frozen, so that the second tank T2 can be prevented from being damaged.

Further, in order to prevent the second tank T2 from being damaged due to the freezing of the liquid L2, as shown in FIG. 5, the second tank T2 may have a shape that gradually widens upward. In FIG. 5, the width of the second tank T2 (distance between the partition wall 5 and the outer wall 3) increases as it goes upward by providing the partition wall 5 so that the upper end tilts inward (storage space S side) from the lower end. I am doing so. Thereby, when the liquid L2 freezes and becomes a frozen body, the increase in the volume of the frozen body is pushed out to the wide portion at the top of the second tank T2. Therefore, the pressure applied to the outer wall 3 and the partition wall 5 forming the second tank T2 can be suppressed, and damage to the second tank T2 can be prevented. In FIG. 5, the width of the second tank T2 is gradually widened upward in the entire height direction, but only the portion including at least the upper end of the second tank T2 has a width upward. It is good also as a shape which spreads gradually.

Although the cool box 1 according to the above-described embodiment has a structure in which the front wall of the casing can be opened and closed, the present invention can be used as long as the structure has at least a casing having a storage space for the object to be cooled inside. It is not limited to this, For example, you may comprise like cold storage 1 'shown in FIG. As with the cool box 1 shown in FIG. 1, the casing that forms the outer shape of the cool box 1 'includes a front wall 2a and a back wall 2b, opposed top wall 2c and bottom wall 2d, opposed right side wall 2e and left side wall. However, unlike the cool box 1, the top wall 2c is detachable.

In FIG. 6, the upper ends of the back wall 2b and the right side wall 2e are broken, and the inside of the right side wall 2e is seen through. In the cool box 1 ', the front wall 2a, the back wall 2b, the right side wall 2e, and the left side wall 2f have the same cooling holding structure as described above. That is, the front wall 2a, the back wall 2b, the right side wall 2e, and the left side wall 2f include an outer wall 3, an inner wall 4, and a partition wall 5 provided between the outer wall 3 and the inner wall 4, and between the inner wall 4 and the partition wall 5. Constitutes a first tank T1 for containing the brine solution L1, and a space between the outer wall 3 and the partition wall 5 constitutes a second tank T2 for containing the liquid L2. A cooling means 6 is provided between the partition wall 5 and the outer wall 3.

Subsequently, another embodiment of the present invention will be described. 7 and 8 show the internal structure of a cold box 1a according to another embodiment of the present invention. The basic configuration of the cool box 1a shown in FIG. 7 and FIG. 8 is the same as the configuration of the cool box 1 shown in FIG. 2 and FIG. 3, and here, the same reference numerals are given to the corresponding components. Detailed description is omitted.

Compared to the cool box 1 shown in FIGS. 2 and 3, the cool box 1 a of the present embodiment is provided with a cooling holding structure only on the back wall 2 b, and instead, the fin coil device 20, the pipe 23, Further, a pump 24 and a blower (blower unit) 25 are further provided. The cooling and holding structure of the back wall 2b is the same as that shown in FIGS.

The fin coil device 20 is provided in the housing 2 of the cool box 1 a and includes a plurality of plate-like fins 21 and a heat exchange tube 22 that penetrates the plate-like fins 21. In the present embodiment, the fin coil device 20 is attached to the right side wall 2e and the left side wall 2f of the housing 2. The position where the fin coil device 20 is attached is not limited to this. For example, the fin coil device 20 may be attached to at least one of the front wall 2a, the back wall 2b, the top wall 2c, and the bottom wall 2d.

The plate-like fins 21 have a thin plate shape extending in the height direction of the cool box 1a, and a plurality of plate-like fins 21 are parallel to each other with a predetermined interval between the right side wall 2e and the left side wall 2f. It is attached to become. The plate-like fins 21 are preferably formed of a material having high thermal conductivity. Examples of such materials include copper, copper alloy, aluminum, aluminum alloy, titanium, titanium alloy, and stainless steel.

The heat exchange tube 22 extends in the height direction of the cool box 1 a while meandering, and vertically penetrates the main surface of the plurality of plate-like fins 21. The heat exchange tube 22 is also preferably formed of a material having high thermal conductivity, and may be formed of the same material as the plate-like fins 21.

The pipe 23 is connected to both ends of the heat exchange pipe 22, and connects the heat exchange pipe 22 to the first tank T1. The pump 24 circulates the brine solution in the first tank T1 in the heat exchange tube 22. The pipe 23 and the pump 24 may be provided in the storage space S, or part or all of them may be embedded in the wall of the housing 2.

The blower 25 blows the air in the storage space S between the plurality of plate-like fins 21. As the blower 25, for example, a small fan, a bladed fan such as a pressure ventilation fan, a sirocco fan, a turbo fan, a limit load fan, or the like can be used.

According to the cool box 1a of the present embodiment, the fin coil device 20 is provided in the housing 2, and the brine solution in the first tank T1 is circulated through the heat exchange pipe 22, whereby the plate fins 21 and the heat exchange are performed. Heat exchange with the air in the storage space S can be performed via the surface of the tube 22. In the fin coil device 20, by reducing the distance between the plate-like fins 21 and increasing the number of the plate-like fins 21, the area for heat exchange with the air in the storage space S can be easily increased. Therefore, since the air in the storage space S can be efficiently cooled by the fin coil device 20, even when the cooling holding structure is provided only on the back wall 2b, the temperature in the storage space S is sufficiently low. It can be.

Further, the air in the storage space S is blown between the plate-like fins 21 by the blower 25, so that the cooled air near the surfaces of the plate-like fins 21 and the heat exchange tubes 22 is efficiently put into the storage space S. It can be circulated. Thereby, the cooling effect in the storage space S can be further enhanced.

Further, in the cool box 1a of the present embodiment, the fin coil device 20 and the like are installed without providing a cooling holding structure on the right side wall 2e and the left side wall 2f. Here, the wall having the cooling and holding structure is heavier because the brine solution L1 and the liquid L2 are accommodated in the first tank T1 and the second tank T2, respectively. On the other hand, the total weight of the fin coil device 20, the pipe 23, the pump 24, and the blower 25 is generally smaller than the total weight of the brine solution L1 and the liquid L2. Therefore, compared with the cool box 1 shown in FIGS. 2 and 3, the cool box 1 a of the present embodiment can realize a cooling effect equivalent to or higher than that of the storage space S and can reduce the weight.

In addition, the structure of the fin coil apparatus 20 is not limited to the above-mentioned thing, All the well-known fin coil apparatuses can be used. Moreover, in the cool box 1a, the back wall 2b may have a cooling holding structure shown in FIG.

Subsequently, a further preferable modification of the present embodiment will be described. 9 and 10 show the internal structure of a cold box 1a 'according to a modification of the cold box 1a.

Compared to the cool box 1a shown in FIGS. 7 and 8, the cool box 1a ′ further includes a plate 26 facing the inner surface of the housing 2, and the fin coil device 20 includes the inner surface of the casing 2. And the plate 26. Specifically, two plates 26 are provided so as to face the right side wall 2e and the left side wall 2f, respectively, between the right side wall 2e and one plate 26, and between the left side wall 2f and the other plate. The fin coil device 20 is provided between each of them.

The plate 26 is a flat plate having a rectangular shape in plan view. The material of the board 26 is not particularly limited, and can be selected according to the use of the cool box 1a ′ and the size of the storage space S. For example, the plate 26 may be formed of plastic having a heat insulating effect, or may be formed of stainless steel, copper, copper alloy, aluminum, aluminum alloy, titanium or the like having a heat transfer effect.

Thus, by covering the fin coil device 20 with the plate 26, the plate 26 serves as a partition to separate the fin coil device 20 from the storage space S, and the temperature around the fin coil device 20 is the center side of the storage space S. It becomes lower than the temperature. Thereby, compared with the case where the board 26 is not provided, the temperature difference between the air near the surfaces of the plate-like fins 21 and the heat exchange pipe 22 and the brine liquid L1 flowing in the heat exchange pipe 22 can be reduced. Therefore, it becomes difficult for frost to adhere to the surfaces of the plate-like fins 21 and the heat exchange tubes 22, and a decrease in heat exchange efficiency due to frost can be prevented.

Moreover, it can suppress with the board 26 that the air sent between the several plate-shaped fins 21 from the air blower 25 flows out to the center side of the storage space S in the middle of being cooled by the fin coil apparatus 20. . Therefore, the cooling effect by the fin coil device 20 can be further enhanced. Therefore, it is preferable that the plate 26 has a size that can cover the entire fin coil device 20 and is as close to the fin coil device 20 as possible.

Note that it is preferable to form a plurality of slits 27 in the plate 26. Thereby, a part of the air cooled by the fin coil device 20 flows out to the center side of the storage space S through the slit 27. Accordingly, in addition to the airflow that flows from the blower 25 shown in FIG. 9 through the lower end of the plate 26 to the storage space S, an airflow that flows from the slit 27 to the storage space S is generated. It can cool uniformly.

The cold storage provided with the above-described fin coil device is suitable for a refrigerated showcase in which outside air easily enters the storage space and a cold storage vehicle having a large storage space. Then, the example which applied the cool box which concerns on this invention to the cool truck is demonstrated. In addition, about the member which has the substantially same function as the thing in the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

FIG. 11 shows a cold car 30 equipped with a cold box 1b. Of the walls forming the outer shape of the housing 2 of the cool box 1b, only the front wall 2a has a cooling holding structure. The cool box 1b further includes a fin coil device 20, a pipe 23, a pump 24, a blower 25, and a plate 26, and a slit 27 is formed in the plate 26.

The fin coil device 20 is attached to the top wall 2c, and the configuration thereof is substantially the same as that shown in FIGS. A heat exchange pipe (not shown in FIG. 11) of the fin coil device 20 is connected to the first tank T1 of the front wall 2a by a pipe 23, and the heat exchange pipe has a pump 24 in the first tank T1. Brine solution is circulating. The blower 25 blows air in the storage space S between a plurality of plate-like fins (not shown in FIG. 11) of the fin coil device 20.

Further, the fin coil device 20 is provided between the inner surface of the top wall 2c and the plate 26. Air from the blower 25 flows between the inner surface of the top wall 2c and the plate 26 from the front wall 2a toward the back wall 2b, and part of the air flows out from the slit 27 to the lower storage space S.

As described above, the cool box 1b further includes the fin coil device 20, and a cooling holding structure is provided only on the upper surface wall 2c. Thereby, while being able to cool the air in the storage space S efficiently, the cool box 1b can be lightened. Therefore, the cold storage vehicle 30 can carry a heavier thing and can improve transport efficiency.

Further, by covering the fin coil device 20 with the plate 26, it is possible to prevent the heat exchange efficiency from being lowered due to frost. Furthermore, by letting some of the air cooled by the fin coil device 20 flow downward from the slit 27, the air in the storage space S can be uniformly and efficiently cooled.

Also, the back wall 2b constitutes a door that can be opened and closed. Here, in the cool box 1b, the plate 26 is provided so that one end thereof extends to the vicinity of the back wall 2b, and the air that has passed through the fin coil device 20 flows downward near the back wall 2b. Thereby, when the back wall 2b is opened, the air flowing downward makes it difficult for outside air to enter the accommodation space S, and a rapid temperature rise of the air in the accommodation space S can be prevented.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, A various change is possible unless it deviates from the meaning.

For example, in the above-described embodiment, the outer shape of the casing of the cool box is a rectangular parallelepiped, but is not limited thereto, and may be a cube, a tetrahedron, a cylinder, or the like.

In the above-described embodiment, the liquid L2 in the second tank T2 is frozen in order to cool the brine solution L1, but when the freezing temperature of the liquid L2 is lower than the cold storage temperature of the storage object, the liquid L2 may not be frozen. That is, the liquid L2 may be a liquid that does not freeze at 0 ° C., and the cooling unit 6 may be configured not to freeze the liquid L2.

When the liquid L2 is completely frozen, the heat exchange efficiency with the brine solution L1 decreases. Therefore, for example, when the cool box is a refrigerated showcase, since outside air frequently flows into the storage space S, temperature control in the storage space S becomes difficult. Therefore, by making the liquid L2 a liquid that does not freeze even at the temperature of the refrigerant flowing inside the cooling means 6 (for example, −20 ° C.), the heat exchange efficiency between the liquid L2 and the brine solution L1 does not decrease, and the inside of the storage space S Even if outside air flows in, the air in the accommodation space S can be quickly cooled.

If the liquid L2 is not frozen, the effect of cooling the animal after the supply of power to the cool box is reduced, but the refrigerated showcase is always used in an environment where power is supplied, so no problem occurs.

The cold storage according to the present invention can be applied to a cold storage vehicle, a cold storage container (air cargo, maritime container, railway container), a large cold storage, a refrigerated showcase, a small cold storage container, and the like.

DESCRIPTION OF SYMBOLS 1 Cold storage 1 'Cold storage 1a Cold storage 1a' Cold storage 1c Cold storage 2 Case 2a Front wall

2b Rear wall

2c Top wall

2d Bottom wall 2e Right side wall 2f Left side wall 3 Outer wall 3a Waterproof wall 3b Waterproof wall 3c Waterproof wall 4 Inner wall 5 Bulkhead 6 Cooling means 7 Refrigerator 7a Refrigerant pipe 8 Thermometer 9 Caster 10 Handle 11 Inlet 12 Outlet 13 Inlet 14 Outlet 20 Fin coil device 21 Plate fin 22 Heat exchange pipe 23 Pipe 24 Pump 25 Blower 27 Slit 30 Cold storage vehicle L1 Brine solution L2 Liquid S Storage space T1 First tank T2 Second tank

Claims

A cold storage room having at least a housing having a storage space for the object to be cooled inside,
A part of the wall forming the outer shape of the casing is
An outer wall, an inner wall having thermal conductivity facing the storage space, and a partition wall having thermal conductivity provided between the outer wall and the inner wall,
Between the inner wall and the partition wall is a first tank for containing a brine solution that does not freeze at 0 ° C.,
Between the outer wall and the partition wall, a second tank for storing liquid is formed,
The second tank is provided with a cooling means for cooling the stored liquid to less than 0 ° C.
The cold storage according to claim 1, wherein the cooling means freezes the liquid.
Corresponding to additional claim 4 The liquid is a liquid that does not freeze at 0 ° C.
The cold storage according to claim 1, wherein the cooling means does not freeze the liquid.
The partition wall is formed of a material selected from cold-resistant rubber, plastics, foamed resins, ceramics, and glass, and materials coated with copper, titanium, stainless steel, aluminum, and aluminum alloy, or 4. The cool box according to claim 1, which has a multilayer structure having an air layer inside.
The wall forming the outer shape of the housing consists of a front wall, a back wall, a top wall, a bottom wall, a right side wall, and a left side wall,
The at least one of the front wall, the back wall, the top wall, the bottom wall, the right side wall, and the left side wall includes the outer wall, the inner wall, and the partition wall. Cold storage in any one.
The cold box according to any one of claims 1 to 5, wherein the freezing temperature of the liquid is higher than the freezing temperature of the brine solution.
The cold storage according to any one of claims 1 to 6, wherein at least a portion including the upper end of the second tank has a shape in which a width gradually increases upward.
A thermometer for measuring the temperature of the brine solution;
Control means for controlling cooling of the liquid by the cooling means based on the temperature;
The cold storage according to any one of claims 1 to 7, further comprising:
The cold storage according to any one of claims 1 to 8, wherein a material, a thickness, and a heat transfer area of the partition wall are set so that the brine solution is not completely frozen.
A fin coil device provided in the housing and having a plurality of plate fins and a heat exchange tube penetrating the plate fins;
A pipe connecting the heat exchange pipe to the first tank;
A pump for circulating the brine solution in the heat exchange tube;
The cool box according to any one of claims 1 to 9, further comprising:
The cool box according to claim 10, further comprising a blowing means for blowing the air in the storage space between the plate fins.
A plate facing the inner surface of the housing;
The cold storage according to claim 10 or 11, wherein the fin coil device is provided between the inner surface and the plate.
The cold storage according to claim 12, wherein a slit is formed in the plate.