JP2002357380A - Cool box - Google Patents

Abstract

(57) [Summary] [Problem] To obtain a regenerator mounting structure that is optimal for keeping cool by a natural convection air circulation system. SOLUTION: A regenerator 14 is attached to a lower surface of a partition plate 20 constituting a top surface of a cold storage room of a cool box, and peaks 37, 37,...
Forming a concave and convex shape composed of 39 ..
Are provided above the air passages S, S,.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool box which is loaded on a truck or the like and transported.

[0002]

2. Description of the Related Art Generally, a cool box loaded and transported on a truck or the like is disposed above a cool box in a cool box body having a heat insulating structure as shown in FIGS. 1 and 2, for example. The regenerator is provided with a regenerator having a built-in regenerative material for keeping the refrigerating room cool by a natural convection air circulation system, and a refrigerating device for cooling and refrigerating the regenerative material of the regenerator. The refrigerating device is arranged in a different configuration above the cool box main body, while the regenerator is arranged above the cool box inside the cool box main body. Therefore, in the prior art,
A partition plate constituting the top surface of the cold storage room is provided on the upper part of the cool box main body, and a refrigerating device is disposed above the partition plate and a regenerator is disposed below the partition plate.

[0003] In the case of cooling by the natural convection air circulation system, an airflow is obtained in which air passing from the upper part to the lower part of the regenerator disposed in the upper part of the cooler compartment descends in the cooler compartment. Is important to improve the cooling efficiency.

In actual practice, when the regenerator is mounted on the lower surface of the partition plate, a gap is formed between the regenerator and the partition plate to allow air to flow therein. A method of interposing a spacer or the like has been adopted.

[0005]

However, when the assembling method in which the spacers are interposed in advance is employed as described above, there arises a problem that the number of parts increases and the number of assembling steps also increases. In addition, in the case of a cool box, when installing the regenerator, set the partition plate upside down,
After assembling the regenerator on the partition plate in that state, a method is adopted in which the regenerator is turned upside down and assembled on the cool box body. Then, a spacer is interposed in advance between the regenerator and the partition plate, the regenerator is assembled, and the spacer needs to be removed when the regenerator is turned upside down. There is also a problem that becomes.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to obtain a regenerator mounting structure that is optimal for keeping cool by a natural convection air circulation system.

[0007]

According to the first aspect of the present invention, as means for solving the above-mentioned problems, there are provided cold storage materials 30, 30,... For keeping the cold storage room 5 in the cold storage main body 1 having a heat insulating structure. Regenerator 14 and cold storage materials 30 of the regenerator 14
··· In a cool box provided with a refrigeration unit 13 for cooling the refrigeration unit 13, the refrigeration unit 13 is disposed on the upper surface of a partition plate 20 constituting the top surface of the cold storage room 5, while the partition plate 20
The regenerator 14 is mounted on the lower surface of the partition plate 20, and the ridges 37, 37,.
An uneven shape consisting of 9, 39,... Is formed so that air passages S, S,.

[0008] With the above-described structure, if the regenerator 14 is directly attached to the partition plate 20, the partition plate 2
The valleys 39, 39,... Of the lower surface 0 constitute the air passages S, S,..., And a mounting structure of the regenerator 14 that is optimal for keeping cool by the natural convection air circulation system is obtained. Moreover, even when the regenerator 14 is assembled with the partition plate 20 turned upside down, and then assembled into the cool storage body 1 by turning upside down, the air passages S, S,.
Can be secured.

As in the invention of claim 2, claim 1
In the cool box described above, the partition plate 20 is provided with a side wall portion 20 a placed on an upper end of the cool box body 1 and the side wall portion 20.
a, the volume of the cold storage room 5 can be increased by the height of the side wall portion 20a.

[0010] As in the invention of claim 3, claim 2
In the cool box described above, when the partition plate 20 is formed by filling a heat insulating material 31 between an outer plate 34 and an inner plate 36 having a U-shaped cross section in which side walls are fitted to each other, a side wall portion is provided. 20
Since a has a double plate structure, the strength is improved,
Sufficient heat insulation performance is obtained.

As in the invention of claim 4, claim 3
In the cool box described above, the outer plate 34 and the inner plate 36
Is made of fiber-reinforced plastic mixed with fibers such as glass fiber, and the partition plate 20
When high-density fibers braided in a net shape are mixed into the corner portion C in the above, the strength of the corner portion C of the partition plate 20 is improved, and sufficient collision resistance is obtained.

As in the invention of claim 5, claim 3
5. In the cool box according to any one of the items 4 and 4, a bolt for connecting the outer plate 34 and the inner plate 36 is penetrated between the outer plate 34 and the inner plate 36 constituting the side wall portion 20a. With the screw member 40 interposed, the side wall 2
When the heat insulating structure 41 having a predetermined dimension is formed on the inner peripheral side of the screw member 40 at 0a, the outer plate 34 and the inner plate 36 can be firmly connected, and the heat insulating performance due to the interposition of the screw member 40 is improved. The reduction can be covered by the formation of the heat insulating structure portion 41, and the occurrence of dew condensation on the outer peripheral surface of the partition plate can be prevented.

[0013]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

The cool box is loaded on a truck or the like and transported. As shown in FIGS. 1 and 2, a cool box body 1 having a heat insulating structure and an opening 4 of the cool box body 1 are provided. It is configured to include a door 2 that opens and closes, and a cooling unit 3 disposed in the cooling box body 1.

The cold storage main body 1 is formed in a vertically long rectangular parallelepiped box shape having an opening 4 on the front surface for taking in and out of storage items, and a cold storage room 5 for storing storage items and a cold storage room 5 for storing the storage items. A machine room 6 is formed above a partition plate 20 (which will be described in detail later) that constitutes a top surface, and is formed with a cover cover 7. Reference numeral 8 denotes an air suction port for sucking air into the machine room 6, reference numeral 9 denotes an air outlet for blowing air from the machine room 6, and reference numeral 10 denotes a caster for moving the cool box.

The outer wall of the cold room 5 in the cool box body 1 has a heat insulating structure in which a heat insulating material 23 is filled between inner and outer plates 21 and 22 made of fiber reinforced plastic.

The door 2 is fitted into the opening 4 of the cool box main body 1 at the time of the closing operation, and a heat insulating material is provided between the inner and outer plates made of fiber reinforced plastic similarly to the cool box main body 1. It is a heat insulating structure that is filled. The door 2 is pivotally supported by hinges 11 and 11 on the right side edge of the opening 4 so as to be freely opened and closed. Also,
A lock device 12 for maintaining the closed state of the door 2
Are provided at the upper and lower edges of the opening 4 and at the upper and lower ends of the door 2.

The refrigerating means 3 comprises a refrigerating device 13 and a regenerator 14 which is cooled and stored by the refrigerating device 13.

The refrigerating device 13 includes a compressor 15 and a condenser 16 arranged in the machine room 6 and the refrigerating room 5.
And a cooling pipe 17 (see FIGS. 3 to 5) to which the liquid refrigerant from the condenser 16 is supplied. Reference numeral 18 denotes a cooling fan for cooling the condenser 16, and 19 denotes a drain pan.

The compressor 15, the condenser 16, and the cooling pipe 17 are sequentially connected by a refrigerant pipe (not shown). The refrigerant compressed by the compressor 15 is condensed and liquefied by the condenser 16, and is expanded by an expansion valve (not shown). ), The cooling pipe 1
7 and the regenerator 1
The cold storage material 30 (see FIG. 5) stored in the storage 4 is cooled to cool. The operation of the refrigeration unit 13 is performed only in the storage warehouse at the delivery terminal. During the transportation, the refrigeration unit 13 is not operated, and the storage stored in the cool storage box by the cold stored in the regenerator 14 is not performed. Items are to be kept cool.

As shown in FIGS. 3 to 5, the regenerators 14 are arranged in parallel in a large number (that is, a plurality of cooling pipe rows D, D,... Line),
Cooling pipe 17, through which the refrigerant flows to act as an evaporator,
17 ... Further, the regenerator 14 includes:
A flow divider 25 serving as a refrigerant introduction part to the regenerator 14 and a header 26 serving as a refrigerant lead-out part from the regenerator 14 are provided. Reference numeral 27 denotes a capillary tube connecting the flow distributor 25 and the cooling pipe 17.

The cooling pipes 17, 17,... Are supported by tube sheets 28, 28, 28 at both ends and an intermediate part.

As shown in FIG. 5, the regenerator 14 includes spacers 29 disposed between the cooling pipe rows D, D,.
And a cold storage material 30 in a bag sandwiched between each spacer 29 and each cooling pipe row D. Each of the spacers 29 has a substantially hat-shaped cross section that widens from an upper end to a lower end, and an opening (not shown) is formed on a side surface thereof. Further, on both sides of the lower end of the spacer 29, cold storage material receiving portions 29a, 29 each having a substantially L-shaped cross section for supporting the lower end of the cold storage material 30 to be inserted.
a is protruded integrally. With this configuration, the cold storage material 30 comes into close contact with the cooling pipes 17, 17,..., And the cold storage material 30 is efficiently cooled by the cooling pipe 17 during cold storage. In addition, since the cold storage material 30 is held in the cooling pipe 17 and the spacer 29 in an almost exposed state, the cold storage material 30 comes into good contact with the air in the cold storage room 5 during the cold storage, and the cold storage performance is also improved. Will be done.

The regenerator 14 is provided with the regenerator material 3.
A cold storage material pressing plate 32 for pressing the outermost one of 0, 30,... Toward the cooling pipes 17, 17,. The regenerator presser plate 32 has a horizontal mounting piece 32a at an upper end, and a cold storage material receiving portion 32b having a substantially L-shaped cross section for supporting a lower end of the cold storage material 30 at a lower end. The piece 32a is attached to the partition plate 20 by fixing it with a bolt 33. And
The lower end of the cold storage material holding plate 32 is in a free state. Further, the upper end of each tube sheet 28 is also connected to the partition plate 20.
The bottoms of the tube sheets 28, 28, 28 are connected to each other by a reinforcing plate 35 having a substantially L-shaped cross section. Then, the reinforcing plate 35
Each of the vertical pieces 35a is formed by a bent portion 38 in a U-shape which presses the cold storage material holding plate 32 toward the cold storage material 30 side.

As shown in FIGS. 6 and 7, the partition plate 20 is provided integrally with the side wall 20a mounted on the upper end of the cool box main body 1 and at the upper end of the side wall 20a. A heat-insulating material 31 is filled between the outer plate 34 and the inner plate 36 having a U-shaped cross section in which the side walls 34a and 36a are fitted with each other. It is configured. By doing so, the side wall portion 20a
The height of the cold storage chamber 5 can be increased by the height, and the side wall portion 20a has a double plate structure, so that strength is improved and sufficient heat insulating performance is obtained.

The outer plate 34 and the inner plate 36
Is made of fiber reinforced plastic mixed with fibers such as glass fiber.
The high-density fibers braided in a net shape are mixed in the corner portion C (see FIG. 6). By doing so, the strength of the corner portion C of the partition plate 20 is improved, and sufficient collision resistance is obtained.

The inner plate 3 serving as the lower surface of the partition plate 20
On the top surface 36b of No. 6, an uneven shape in which peaks 37 and valleys 39 are alternately arranged is formed.

The regenerator 14 can be mounted on the top surface 36b of the inner plate 36, which is the lower surface of the partition plate 20, and this mounting procedure is performed as follows.

First, as shown in FIG. 8, the partition plate 20 is set upside down (that is, the inner plate top surface 36b on which the uneven shape is formed faces upward), and the cold storage is performed on the inner plate top surface 36b. A container assembly (that is, a regenerator before the regenerator material 30 and the spacer 29 are assembled) is set. At this time, the regenerator 14 is attached in a state of being directly attached to the inner plate top surface 36b, but the air passages S, S, are formed between the regenerator 14 and the valleys 39, 39,. (See FIG. 7). In this state, the cold storage materials 30, 30,... Are inserted and arranged at predetermined positions from above. Thereafter, as shown in FIG. 9, the spacers 29 are inserted from above to complete the installation of the regenerator 14. Thereafter, the partition plate 20 is turned upside down and assembled to the cool box main body 1. In this way, it is possible to easily secure the air passages S, S,... Above the regenerator 14, and to obtain a mounting structure of the regenerator 14 which is optimal for keeping cool by the natural convection air circulation system.

The outer plate 3 forming the side wall 20a
As shown in FIGS. 6 and 7, a wooden screwing member 40 that penetrates a bolt (not shown) for connecting the outer plate 34 and the inner plate 36 is provided between the inner plate 4 and the inner plate 36. It is interposed (see FIG. 10). With the interposition of the screwing member 40, the heat insulating performance of the partition plate side wall portion 20a is deteriorated, and thus the occurrence of dew condensation on the outer surface of the partition plate 20 becomes a problem. Side wall 20a
A heat insulating structure portion 41 having a predetermined dimension is formed on the inner peripheral side of the screwing member 40 so as to prevent the transmission of cold heat from the inside of the partition plate 20 to the outer surface. The heat insulating structure portion 41 is configured by expanding a portion corresponding to the side wall portion of the inner plate 36 inward to increase the thickness of the heat insulating material 31. In this way, the outer plate 34 and the inner plate 36 can be firmly connected, and the wooden screw member 4
0 can be covered by the formation of the heat insulating structure 41, and the partition plate 20
The occurrence of dew condensation on the outer peripheral surface can be prevented.

As shown in FIG. 11, the screw member 40 is made of synthetic resin (for example, vinyl chloride).
In some cases. In this case, since the pipe 40 made of a synthetic resin (for example, made of vinyl chloride) has a higher heat insulating property than wood, the heat insulating performance of the portion is improved as compared with the case shown in FIG.

[0032]

According to the first aspect of the present invention, the cold storage materials 30 for keeping the cold storage room 5 in the cold storage main body 1 having a heat insulating structure.
And a cold storage material 30 of the cold storage 14,
In the cold storage provided with a refrigeration unit 13 for cooling the cold storage unit 30, the refrigeration unit 13 is arranged on the upper surface of a partition plate 20 constituting the top surface of the cold storage room 5, while the partition plate 2
0 is attached to the lower surface of the partition plate 20, and the ridges 37, 37,.
Since the air passages S, S,... Are secured above the regenerator 14 by forming an uneven shape consisting of 9, 39..., The regenerator 14 optimal for cold storage by the natural convection air circulation system is provided. There is an effect that the mounting structure can be obtained. Moreover, even when the regenerator 14 is assembled with the partition plate 20 turned upside down, and then installed upside down on the cold storage main body 1, the air passages S, S,. There is also an effect that it can be secured.

As in the invention of claim 2, claim 1
In the cool box described above, the partition plate 20 is provided with a side wall portion 20 a placed on an upper end of the cool box body 1 and the side wall portion 20.
a, the volume of the cold storage room 5 can be increased by the height of the side wall portion 20a.

As in the invention of claim 3, claim 2
In the cool box described above, when the partition plate 20 is formed by filling a heat insulating material 31 between an outer plate 34 and an inner plate 36 having a U-shaped cross section in which side walls are fitted to each other, a side wall portion is provided. 20
Since a has a double plate structure, the strength is improved,
Sufficient heat insulation performance is obtained.

As in the invention of claim 4, claim 3
In the cool box described above, the outer plate 34 and the inner plate 36
Is made of fiber-reinforced plastic mixed with fibers such as glass fiber, and the partition plate 20
In the case where high-density fibers braided in a net shape are mixed into the corner portion C in the above, the strength of the corner portion C of the partition plate 20 is improved, and sufficient collision resistance is obtained.

As in the invention of claim 5, claim 3
5. In the cool box according to any one of the items 4 and 4, a bolt for connecting the outer plate 34 and the inner plate 36 is penetrated between the outer plate 34 and the inner plate 36 constituting the side wall portion 20a. With the screw member 40 interposed, the side wall 2
When the heat insulating structure 41 having a predetermined dimension is formed on the inner peripheral side of the screw member 40 at 0a, the outer plate 34 and the inner plate 36 can be firmly connected, and the heat insulating performance due to the interposition of the screw member 40 is improved. The reduction can be covered by the formation of the heat insulating structure portion 41, and the occurrence of dew condensation on the outer peripheral surface of the partition plate can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view of a cool box according to an embodiment of the present invention.

FIG. 2 is a front view of the cool box according to the embodiment of the present invention.

FIG. 3 is a bottom view of the regenerator in the cool box according to the embodiment of the present invention.

FIG. 4 is a side view of the regenerator in the cool box according to the embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view showing a main part of a regenerator in the cool box according to the embodiment of the present invention.

FIG. 6 is a bottom view of a partition plate in the cool box according to the embodiment of the present invention.

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a side view showing a procedure for assembling the regenerator to the partition plate in the cool box according to the embodiment of the present invention (that is, a state at the time of inserting the regenerative material).

FIG. 9 is a side view showing a procedure (that is, a state at the time of spacer insertion) when the regenerator is assembled to the partition plate in the cool box according to the embodiment of the present invention.

FIG. 10 is an enlarged sectional view of a main part of a partition plate in the cool box according to the embodiment of the present invention.

FIG. 11 is an enlarged sectional view of a main part showing a modification of the partition plate in the cool box according to the embodiment of the present invention.

[Explanation of symbols]

1 is a cold storage main body, 5 is a cold storage room, 14 is a regenerator, 20 is a partition plate, 20a is a side wall, 20b is an upper wall, 30 is a cold storage material, 31 is a heat insulating material, 34 is an outer plate, and 36 is an inner plate. Plate, 37 is a mountain, 39 is a valley, 40 is a screw member, 41 is a heat insulating structure,
C is a corner, and S is an air passage.

Continued on the front page F term (reference) 3L044 AA04 BA02 CA11 DC03 DD07 KA04 3L045 AA07 BA02 CA02 DA02 HA01 KA16 PA05

Claims (5)

[Claims] 1. A regenerator (14) provided with regenerative materials (30) for reserving a refrigerating room (5) in a refrigerating body (1) having a heat insulating structure, and the regenerator (14). ) Cold storage material (3
0), (30), .., a refrigeration unit (13) for cooling the refrigeration compartment, wherein the refrigeration unit (5) is provided with Equipment (13)
On the other hand, the regenerator (14) is attached to the lower surface of the partition plate (20), and the partition plate (2) is attached.
On the lower surface of (0), an uneven shape composed of peaks (37), (37),... And valleys (39), (39), is formed, and air is formed above the regenerator (14). Passage (S),
(S) An insulated box characterized by being able to secure. 2. The partition plate (20) is provided with a side wall (20a) placed on the upper end of the cool box main body (1) and an upper wall integrally extended from the upper end of the side wall (20a). Part (20b)
2. The cold storage according to claim 1, wherein the cold storage is constituted by: 3. A partition plate (20) comprising an outer plate (34) and a inner plate (3) each having a U-shaped cross section whose side walls are fitted to each other.
3. The refrigerator according to claim 2, wherein a heat insulating material (31) is filled between the cold storage and (6). 4. The outer plate (34) and the inner plate (36).
Are made of fiber-reinforced plastics in which fibers such as glass fibers are mixed, and high-density fibers braided in a net shape are mixed in the corners (C) of the partition plate (20). 4. The cool box according to claim 3, wherein 5. A bolt for connecting the outer plate (34) and the inner plate (36) between the outer plate (34) and the inner plate (36) constituting the side wall (20a). A screw member (40) through which the side wall (2) is inserted
The cold storage according to any one of claims 3 and 4, wherein a heat insulating structure (41) having a predetermined dimension is formed on an inner peripheral side of the screwing member (40) in 0a).