JPH11294928A - Cold retention box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease a heat storage operation time necessary for storing a sufficient cold heat in a cold storage agent by effectively performing a a heat transfer between heat transfer pipes and the cold storage agent in a cold retention box for storing cold heat in the cold storage agent and maintaining the temperature of the box at low temperature using the cold heat. SOLUTION: In a cold retention box, while cold heat is stored in a cold heat regenerative agent 21 by a refrigerating machine, the box is cooled by using the cold cold heat to maintain a material to be cooled at low temperature. A cold storage agent case 22 with which the cold storage agent 21 is filled, and a heat transfer plate 23 superposed thereon form a cold storage unit 20. The cold storage agent case 22 is formed integrally with heat transfer pipe holding pipes 23a circular in section which protrude so as to surround the outer peripheral surfaces of heat transfer pipes 14a of a refrigerant circuit. Thus, the contact area between the heat transfer pipes 14a and the heat transfer plate 23 is assuredly increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool box for storing fresh foods and the like as objects to be cooled. In particular, a refrigerant circuit in which the refrigerant circulates, and a regenerator cooled by the refrigerant in the refrigerant circuit are provided, and cold heat is stored in the regenerator by the refrigerant circulation operation in the refrigerant circuit. The present invention relates to an improvement of a device for cooling an object to be cooled.

[0002]

2. Description of the Related Art Heretofore, small insulated boxes have been employed to maintain the freshness of a relatively small amount of fresh food. The cool box includes a refrigerant circuit and a regenerator cooled by the refrigerant circulating in the refrigerant circuit. When not using this cool box,
The refrigerant circuit is driven to cool the regenerator by the refrigerant circulation operation, and cool heat is stored therein. When a cool box is used, the inside of the box is cooled using cold heat of a cold storage agent. Thereby, the freshness of fresh food can be maintained by maintaining the inside of the box at a low temperature without requiring a power supply. That is, it is possible to move the cool box while maintaining the inside of the box at a low temperature.

The structure for cooling the regenerator is described below. The regenerator is disposed, for example, below the floor of a storage space. Then, as shown in FIG.
A regenerator case (b) made of metal or the like filled with a regenerator (a),
A heat transfer tube (d) which is housed in the cold storage agent storage box (c) and which serves as an evaporator of the refrigerant circuit is joined to the outer wall surface of the cold storage agent storage box (c) by means such as brazing. With such a configuration, at the time of heat storage, the cold storage agent (a) is cooled by the refrigerant evaporated in the heat transfer tube (d). On the other hand, when utilizing heat storage, the air in the cold storage box is circulated, and the cold storage heat is given to the air by flowing the air around the cold storage agent storage box (c) as shown by an arrow in FIG. 8, for example. Keep the inside low temperature.

[0004]

As described above, in the conventional configuration, a regenerator storage box (c) and a regenerator case (b) are provided between the heat transfer tube (d) and the regenerator (a). Intervening. For this reason,
It is difficult for the cold energy of the refrigerant to be transmitted to the cold storage agent (a), and there is a limit to shorten the heat storage operation time required for storing sufficient cold heat in the cold storage agent (a).

[0005] Further, the cold storage agent case (b) is replaced with a cold storage agent storage box (c).
Because it is housed inside, there may be air between the two, and this air becomes a heat insulating layer and heat transfer tube (d)
In some cases, the heat transfer between the cold storage agent (a) and the cold storage agent (a) was hindered.
This is also one of the causes of the long heat storage operation time required for storing sufficient cold heat in the cold storage agent (a).

Further, since the heat transfer tube (d) is in contact with the outer wall surface of the cold storage agent storage box (c) having a flat surface, both are in a line contact state. For this reason, the heat transfer area is not sufficiently ensured, which is also a cause of the long heat storage operation time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to store cold heat in a cold storage agent and use the cold heat to keep the temperature in a box low. It is an object of the present invention to effectively perform heat transfer between a heat transfer tube and a regenerator during a heat storage operation of a box, thereby shortening a heat storage operation time required to store sufficient cold heat in the regenerator.

[0008]

Means for Solving the Problems To achieve the above object, a first solution of the present invention is to provide a cold storage container (20A) filled with a cold storage agent (21) and a refrigerant circuit (10A). Cooling pipe (14a)
The heat transfer between the cooling pipe (14a) and the regenerator (21) can be effectively performed by increasing the contact area with the cooling pipe (14a).

Specifically, as shown in FIGS. 3 and 5,
A refrigerant circuit (10A) that is housed in a box body (1A) that houses the object to be cooled and circulates a refrigerant, and includes a cold storage agent (21) filled in a cold storage container (20A), and a refrigerant circuit (10A) In a state where the regenerator (21) is cooled by a refrigerant circulating through the refrigerant and cold energy is stored in the regenerator (21), the cold energy is given to the object to be cooled, thereby keeping the object to be cooled at a low temperature. Is assumed. With respect to this cold storage box, the heat storage unit (23) which comes into surface contact with the outer periphery of the cooling pipe (14a) of the refrigerant circuit (10A) in the cold storage container (20A).
a) and (22a) are provided.

According to this specific matter, the refrigerant flowing through the cooling pipe (14a) of the refrigerant circuit (10A) and the heat receiving portion (23) of the cold storage container (20A)
Heat exchange with the heat storage surfaces (a) and (22a) is performed by the relatively large heat transfer surface, and the cold storage agent (21) in the cold storage container (20A) is cooled. In this way, cold heat is stored in the cold storage agent (21). When the object to be cooled is cooled, the object to be cooled is maintained at a low temperature by applying the cold heat to the object to be cooled.

According to a second aspect of the present invention, in the first aspect, the heat receiving portion (23a) of the cold storage container (20A) is connected to the refrigerant circuit (10A).
The configuration is made up of a projection (23a) having an arc-shaped cross section which is projected to surround the outer peripheral surface of the cooling pipe (14a) of (A).

A third solution is to directly exchange heat between the cold storage container (20A) and the cooling pipe (14a) of the refrigerant circuit. Specifically, the premise is the same as the premise of the first solving means. The regenerator (20A) is provided with a heat receiving portion (22a) that directly contacts the cooling pipe (14a) of the refrigerant circuit (10A).

According to this specific matter, the regenerator (21) and the cooling pipe
Only the cold storage container (20A) exists between the container (14a). For this reason, the presence of a substance that hinders heat transfer between the regenerator (21) and the cooling pipe (14a) can be minimized.

According to a fourth aspect of the present invention, in the third aspect, the heat receiving portion (22a) of the cold storage container (20A) is provided with a concave portion conforming to the outer peripheral shape of the cooling pipe (14a) of the refrigerant circuit (10A). (22a).

According to a fifth aspect of the present invention, in the fourth aspect, the recess (22a) has a semicircular cross section. A pair of cold storage containers (20) each having concave portions (22a) and (22a)
(A) and (20A), the cooling pipe (14a) of the refrigerant circuit is recessed (22a), (22
a) It is arranged so as to be sandwiched between and assembled integrally.

According to these specific items, both the operation of the first solving means and the operation of the third solving means can be obtained.

[0017]

Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a cool box (1) according to the present embodiment. FIG. 2 is a side view thereof. FIG. 3 is a side view showing the internal structure of the cool box (1).

-Description of the overall configuration of the cool box-The cool box (1) according to the present embodiment includes a box body (1A) formed of a rectangular parallelepiped box, and four corners of a bottom plate (1a) of the box body (1A). Casters (2,2 ...) are provided in the parts. This provides a configuration that allows easy movement. On the front of the box body (1A), a door that can open almost the entire front
(3) is provided. The door (3) is rotatable by hinges (3a, 3a, 3a) provided at upper and lower three places.
The door (3) is provided with a lever (3b) operated at the time of opening and closing.

Next, the internal configuration of the cool box (1) will be described with reference to FIG. The internal space of the box body (1A) includes a storage space (A), a refrigerator installation space (B), a cool storage space (C), and an air circulation space (D).

More specifically, an upper portion of the box body (1A) is provided at a position slightly lower than the top plate (1b), and a space for installing a refrigerator between the top plate (1b) and the top plate (1b). An upper partition plate (5) forming (B) is provided. Also, the box body (1
In the lower part of (A), a lower partition plate (6) is provided at a position slightly higher than the bottom plate (1a) and forms a cold storage space (C) with the bottom plate (1a). ing. This lower partition
(6) is a small gap between the front end (left end in FIG. 3) and the rear end (right end in FIG. 3) and the box side plate (1c).
(E, F). The cold storage space (C) and the storage space (A) communicate with each other by the gap (E) at the front end. on the other hand,
A box side plate (1c) is attached to the rear end of this lower partition plate (6).
After extending upward with a slight gap with the upper partition plate (5)
And a guide plate (7) extending in the horizontal direction with a slight gap is connected. Thus, the air circulation space (D) is formed between the guide plate (7) and the box side plate (1c) and between the guide plate (7) and the upper partition plate (5). .

A circulation fan (8) is provided at a position near the upper edge of the guide plate (7), which is an upper open portion of the air circulation space (D). The circulation fan (8) is attached to the lower surface of the upper partition plate (5), and is driven to cover a storage space (A), a cold storage space (C), and an air circulation space (D). The airflow is generated (see the arrow in FIG. 3). The drive source of the circulation fan (8) is a battery (not shown) mounted on the cooling box (1).

Next, the refrigerator (10) housed in the cold storage box (1) will be described. As shown in FIG. 4, the refrigerator (10) includes a compressor (11), a condenser (12), an electric expansion valve (13), a heat exchanger for cold storage (14), and an accumulator (15). Refrigerant circuit (10A) connected in order by piping (16)
It has.

As shown in FIG. 3, a compressor (11) and a condenser
(12) is housed in the refrigerator installation space (B). An air inlet (1d) and an air outlet (1e) are provided in the top plate (1b) forming the upper surface of the refrigerator installation space (B). The air inlet (1d) is located above the condenser (12)
(1e) is formed on one side (the right end in FIG. 3) of the top plate (1b). Below the air outlet (1e), a fan for generating an airflow from the air inlet (1d) to the air outlet (1e) is provided.
(17) is provided. In other words, the configuration is such that the outside air is passed through the condenser (12) in accordance with the driving of the fan (17) to exchange heat with the refrigerant.

The heat exchanger for cold storage (14) is a cold storage space (C)
Cold storage agent in a cold storage unit (20) described below
This is for cooling (21). That is, heat is exchanged between the refrigerant of the heat exchanger for cold storage (14) and the cold storage agent (21) of the cold storage unit (20), and the refrigerant is evaporated to give cold heat to the cold storage agent (21). .

Incidentally, (18) in FIG. 4 is a liquid injection line for returning the liquid refrigerant flowing out of the condenser (12) to the compressor (11). This liquid injection line (18) has a capillary tube (CP) and solenoid valve (1
9) The solenoid valve (19) is opened when the discharge pipe temperature of the compressor (11) rises abnormally, etc., and a part of the liquid refrigerant flowing out of the condenser (12) is provided to the compressor (11). I am going to put it back.

Next, a heat storage unit (20) that receives cold heat from the heat exchanger for cold storage (14) and stores heat will be described. Cool storage space
A plurality of heat storage units (20) as shown in FIG. 5 are accommodated in (C) (see a solid line portion and a virtual line portion in the figure).
Since each of the heat storage units (20, 20,...) Has the same or symmetrical configuration, only one heat storage unit (20) shown by a solid line in FIG. 5 will be described here.

As shown in FIG. 5, the heat storage unit (20)
A resin regenerator case (22) filled with a regenerator (21),
Heat transfer plates (23, 24) arranged on both sides of the cold storage agent case (22)
And consists of The heat transfer plates (23, 24) are formed by extrusion of aluminum. The cool storage container (20A) according to the first aspect of the present invention is constituted by the cool storage agent case (22) and the heat transfer plates (23, 24).

The regenerator case (22) is a flat container having a regenerator space (22a) inside. Inside it,
The regenerator (21) is filled almost without gaps. That is, the regenerator filling space (22a) is filled with the regenerator (21).

The heat transfer plate (23) on the right side in the drawing among the heat transfer plates (23, 24) arranged on the left and right sides of the cool storage agent case (22) serves as a cooling pipe of the heat exchanger for cold storage (14). Heat transfer tubes (14a, 14a, ...) are in contact with each other. As a characteristic of the heat transfer plate (23), a heat transfer tube holding portion (23a) as a heat receiving portion (projection portion) protruding so as to surround the outer periphery of the heat transfer tube (14a) is provided on an outer surface (right side in the drawing). )
Are integrally formed. The heat transfer tube holding portion (23a) is configured such that the one extending along the upper surface side of the heat transfer tube (14a) and the one extending along the lower surface side form a pair and protrude so as to hold the heat transfer tube (14a). I have. And this heat transfer tube holding part (23a)
Is formed in an arc shape, and its radius of curvature matches the radius of the outer peripheral surface of the heat transfer tube (14a). For this reason, the entire inner surface of the heat transfer tube holding portion (23a) is in contact with the outer peripheral surface of the heat transfer tube (14a), and all of the contact portions function as heat transfer surfaces.

In order to prevent a gap from being formed between the inner surface of the heat transfer tube holding portion (23a) and the outer peripheral surface of the heat transfer tube (14a), a brazing material may be poured between the two. According to this, the brazing material flows into this gap due to the capillary phenomenon due to the gap between the heat transfer tube holding portion (23a) and the heat transfer tube (14a),
Both come into contact without any gap.

A plurality of heat transfer fins (24a, 24a) projecting in the horizontal direction are provided on the outer surface (left side in the figure) of the heat transfer plate (24) on the left side in the figure.
a, ...) are provided. These heat transfer fins (24a, 24a,…)
Is for increasing the heat exchange efficiency between the air flowing through the cold storage space (C) and the cold storage agent (21). Therefore, the heat transfer fins (24a, 24a,...) Extend horizontally along the airflow direction.

One of the features of the present embodiment is that the outer surfaces of the cool storage agent case (22) and the inner surfaces of the left and right heat transfer plates (23, 24) are in contact with each other substantially without any gap. ing.
That is, the outer surfaces of the cool storage agent case (22) and the inner surfaces of the left and right heat transfer plates (23, 24) are both formed as smooth flat surfaces, and when these flat surfaces are in contact with each other. , A large contact area can be obtained. That is, the outer surface on the right side of the cool storage agent case (22) in the figure and the heat transfer plate (23) on the right side in the figure
A function as a relatively large heat transfer surface between the refrigerant and the regenerator (21). On the other hand, cool storage case (22)
A relatively large heat transfer between the air flowing through the cold storage space (C) and the cold storage agent (21) is caused by the contact surface between the outer surface on the left side in the drawing and the heat transfer plate (24) on the left side in the drawing. It is configured to function as a surface. In addition, this cool storage agent case (22) and each heat transfer plate (23, 24)
Are integrally joined by an adhesive or the like.

A plurality of heat storage units (20) configured as described above are arranged at predetermined intervals in the horizontal direction.
(C) (see virtual line in FIG. 5). An air flow space (G) is formed at least on the side where the heat transfer fins (24a) are provided.

-Description of Operation- Next, the operation when using the present cool box (1) will be described. This operation includes a heat storage operation for storing cold heat in the cold storage unit (20) and a case where fresh foods and the like are stored using the cold storage box (1), and the storage space (A ).

First, the heat storage operation will be described. In this operation, a power supply is connected to the refrigerator (10) and the compressor (11) and the fan (17) are driven in a state where fresh food and the like are not stored in the storage space (A). As a result, the refrigerator installation space
In (B), an airflow is generated in which the outside air flowing from the air inlet (1d) is discharged from the air outlet (1e). on the other hand,
In the refrigerator (10), the refrigerant discharged from the compressor (11) and subjected to heat exchange with the outside air in the condenser (12) is depressurized by the electric expansion valve (13), and is cooled by the heat exchanger for cold storage (14). In the heat storage unit (20)
After evaporating by heat exchange with 1), it is recovered by the compressor (11) via the accumulator (15). Such a refrigerant circulation operation is performed in the refrigerator (10).

The cold storage agent (21) that has received cold heat from the refrigerant evaporated in the cold storage heat exchanger (14) turns to ice and stores cold heat. At this time, as described above, the heat transfer tubes (14) of the cool storage heat exchanger (14)
Most of the outer periphery of a) is the heat transfer tube holding part (23a) of the heat transfer plate (23).
The heat transfer surface, which is the contact portion, is largely secured. For this reason, cold heat is given to the regenerator (21) at a high heat exchange rate. In addition, since the outer surface of the cool storage agent case (22) and the inner surface of the heat transfer plate (23) are in contact with no gap, a large heat transfer surface is also ensured. Therefore, even with this configuration, the regenerator
Cold heat is applied to (21) at a high heat exchange rate.

As described above, a high heat exchange rate is obtained at the contact portion between the heat transfer tube (14a) and the heat transfer plate (23) and at the contact portion between the heat transfer plate (23) and the cold storage agent case (22). Therefore, the amount of cold heat given to the cold storage agent (21) per unit time increases, and the heat storage operation time required to store sufficient cold heat in the cold storage agent (21) can be shortened.

Next, the cold storage agent (21) is operated by the above-described heat storage operation.
The cooling operation for utilizing the cold stored in the storage device will be described. This operation is performed by storing fresh food or the like in the storage space (A) and then driving the circulation fan (8) with the mounted battery. In other words, if the cool box (1) is moved using the casters (2),
Power cannot be secured. For this reason, the inside of the storage space (A) is maintained at a low temperature by utilizing the cold stored in the cold storage agent (21). By driving the circulation fan (8),
As shown by the arrows in FIG. 3, an airflow is generated across the storage space (A), the cold storage space (C), and the air circulation space (D).
When the air circulating in each of these spaces (A, C, D) reaches the air circulation space (G) of the cold storage space (C), the air is cooled by the cold storage agent (2).
It will be cooled by exchanging heat with the cold stored in 1). Since the heat transfer fins (24a) are provided on the heat transfer plate (24) in contact with the cool storage case (22),
Heat exchange is performed efficiently with (21). Cool storage agent (21)
The air cooled by is supplied to the storage space (A) via the air circulation space (D), and cools fresh foods and the like,
It contributes to maintaining its freshness. By continuously performing such an air circulation operation, the storage space (A) is maintained at a low temperature for a long time.

Then, the cold storage agent (21) in the cold storage space (C)
During heat exchange between the air and the air, the outer surface of the cool storage agent case (22) and the inner surface of the heat transfer plate (24) are in contact with no gap, so a large heat transfer surface is secured. Will be. Therefore, the cold energy of the cold storage agent (21) can be given to the air at a high heat exchange rate, and the effective use of the cold storage heat can be achieved.

[0040]

Second Embodiment Next, a second embodiment of the present invention will be described. This embodiment is a modification of the cold storage unit (20), and the other configuration is the same as that of the first embodiment. Therefore, only the configuration of the cold storage unit (20) will be described here.

As shown in FIG. 6, the heat storage unit (20) according to the present embodiment comprises a resin cold storage agent case (22) constituting the cold storage container (20A) according to the third aspect of the present invention, Case (2
2) The regenerator (21) charged in 2). Particularly, the shape of the cool storage agent case (22) is characterized.

FIG. 6 shows a state in which a pair of heat storage units (20, 20) are assembled. Each heat storage unit (20,2
0) have the same configuration, so here, the heat storage unit (20) located on the right side in the figure will be described.

The regenerator case (22) of the heat storage unit (20)
Are the heat transfer tubes (14a) on the left side of the figure on the left and right sides.
It has a concave portion (22a) as a semicircular heat receiving portion conforming to the shape. Such cold storage case (22,2
The pair of 2) is assembled so as to sandwich the heat transfer tube (14a) with the concave portions (22a) aligned. That is, the heat transfer tube (14a) is inserted into a space having a circular cross section formed between the recessed portions (22a, 22a) of the two cool storage agent cases (22, 22). In this state, the right half of the outer peripheral surface of the heat transfer tube (14a) is the cold storage agent case on the right side in the figure.
The left half of the outer peripheral surface of the heat transfer tube (14a) which is in contact with the inner surface of the concave portion (22a) of (22) is the concave portion of the cool storage agent case (22) on the left side in the figure.
(22a) Contacting the inner surface. That is, the entire outer peripheral surface of the heat transfer tube (14a) is in contact with the cold storage agent cases (22, 22).

As a structure for assembling the heat storage units (20, 20) integrally, each of the heat storage agent cases (22, 22)
An opening (22b) penetrating in the left-right direction is formed in a part of the heat storage units (20, 20) in a state where the openings (22b) are aligned with each other, and these openings (22b) are overlapped. Means such as inserting a bolt (25) across it can be adopted (see FIG. 7).

Therefore, according to the configuration of the present embodiment, the heat transfer tubes (1
There is only a cold storage agent case (22) between 4a) and the cold storage agent (21), and the heat transfer tube (14a) and the cold storage agent case (22)
This means that a large heat transfer area is obtained.
That is, as shown in FIG. 8 (conventional structure), the cold storage agent case (b) is housed in the cold storage agent housing box (c), so that the cold storage agent housing box (c) is provided between the cold storage agent case (b) and the heat transfer tube (d). A state where c) exists or an air layer exists between the cool storage agent case (b) and the cool storage agent storage box (c) does not occur. That is, it is possible to eliminate the existence that hinders heat transfer in the conventional configuration.
For this reason, cold heat is given to the regenerator (21) at a high heat exchange rate. As a result, as in the case of Embodiment 1 described above, the amount of cold heat given to the cold storage agent (21) per unit time increases, and the heat storage required to store sufficient cold heat in the cold storage agent (21) The operation time can be shortened.

In each of the above embodiments, the cool storage unit (20) is arranged below the storage space (A). However, the present invention is not limited to this. Or it may be configured to be arranged on the back.

The cool box (1) is applicable not only to fresh foods but also to various kinds of objects to be cooled. The cool box (1) can be moved not only by the casters (2) but also by various transportation means.

[0048]

As described above, according to the present invention, the following effects are exhibited. According to the first and second aspects of the present invention, cold energy is stored in the cold storage agent, and the cold storage box (20A) filled with the cold storage agent (21) is used for the cold storage box that keeps the temperature in the box low by using the cold heat. ) And the cooling pipe (14a) of the refrigerant circuit (10A) by increasing the contact area, so that heat can be effectively transferred between the cooling pipe (14a) and the regenerator (21). For this reason, the amount of cold heat given to the cold storage agent (21) per unit time increases, and the heat storage operation time required for storing sufficient cold heat in the cold storage agent (21) can be shortened.

According to the third aspect of the present invention, the cold storage container (20A)
By directly exchanging heat with the heat transfer pipe (14a) of the refrigerant circuit, heat transfer between the cooling pipe (14a) and the regenerator (21) can be effectively performed. For this reason, in the present invention,
The amount of cold heat given to the cold storage agent (21) per unit time increases, and the heat storage operation time required for storing sufficient cold heat in the cold storage agent (21) can be shortened.

According to the fourth and fifth aspects of the present invention, the cold storage container (20A) and the cooling pipe (14a) are brought into surface contact with each other.
The effect according to the third aspect of the invention can be exhibited.

[Brief description of the drawings]

FIG. 1 is a front view of a cool box.

FIG. 2 is a side view of the cool box.

FIG. 3 is a side view showing the internal structure of the cool box.

FIG. 4 is a diagram showing a refrigerant circuit of the refrigerator.

FIG. 5 is a cross-sectional view illustrating the cold storage unit according to the first embodiment.

FIG. 6 is a sectional view showing a cold storage unit according to a second embodiment.

FIG. 7 is a perspective view showing a cold storage unit according to a second embodiment.

FIG. 8 is a cross-sectional view showing a conventional cool storage unit.

[Explanation of symbols]

 (1) Cool box (1A) Box body (10A) Refrigerant circuit (14a) Heat transfer tube (cooling tube) (20A) Cool storage container (21) Cool storage agent (22a) Depressed portion (heat receiving portion) (23a) Heat transfer tube holding portion (Heat receiving part, projecting part)

Claims (5)

[Claims] A refrigerant circuit (10A) housed in a box body (1A) for housing an object to be cooled and circulating a refrigerant;
A) having a regenerator (21) filled therein, and a refrigerant circuit (10A)
Cooling agent (21) is cooled by a refrigerant circulating through
In a cold storage box that keeps the cooled object at a low temperature by applying the cooled heat to the cooled object in a state where the cold heat is stored in 1), the cold storage container (20A) includes a cooling pipe of a refrigerant circuit (10A). A cold box characterized by comprising heat receiving portions (23a) and (22a) that are in surface contact with the outer peripheral surface of (14a). 2. The cold storage box according to claim 1, wherein the heat receiving portion (23a) of the cold storage container (20A) has a cross-sectional circle protruding around the outer peripheral surface of the cooling pipe (14a) of the refrigerant circuit (10A). A cold storage box comprising an arc-shaped projection (23a). 3. A refrigerant circuit (10A) housed in a box body (1A) for housing an object to be cooled and circulating a refrigerant;
A) having a regenerator (21) filled therein, and a refrigerant circuit (10A)
Cooling agent (21) is cooled by a refrigerant circulating through
In a cold storage box that keeps the cooled object at a low temperature by applying the cooled heat to the cooled object in a state where the cold heat is stored in 1), the cold storage container (20A) includes a cooling pipe of a refrigerant circuit (10A). A cool box characterized by comprising a heat receiving part (22a) that comes into direct contact with (14a). 4. The cold storage box according to claim 3, wherein the heat receiving portion (22a) of the cold storage container (20A) has a concave portion (22a) conforming to the outer peripheral shape of the cooling pipe (14a) of the refrigerant circuit (10A). An insulated box characterized by comprising: 5. The cold storage box according to claim 4, wherein the recess (22a) has a semicircular cross section, and has a pair of cold storage containers (20A) provided with recesses (22a) and (22a) having the same shape. ), (20A)
However, the cooling pipe (14a) of the refrigerant circuit (10A) is recessed (22a), (22a)
A cool box characterized by being arranged so as to be sandwiched between and integrally assembled.