JPH08337285A - Casing structure of refrigeration equipment for refrigeration containers - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to secure sufficient strength against end wall load while reducing the number of assembly steps and costs by integrating parts. A casing 6 for covering an opening on one side of a box B for a refrigerating container and for partitioning the outside of the refrigerator provided with a compressor 1 and a condenser 2 from the inside of a refrigerator provided with an evaporator 3, and a luggage compartment 7. And a back plate 8 that constitutes a partition wall, and the casing 6 includes a metallic outer casing 9 that constitutes an outer wall surface, an inner casing 10 that constitutes an inner wall surface, and an interval between the casings 9 and 10. A plurality of spacers 11, 11 to be held
.. and heat insulating material 12 filled between both casings 9 and 10
., And a plurality of vertically extending cold air passages 13, 13 ... To the luggage compartment 7 are provided between the interior casing 10 and the back plate 8. In a casing structure of a refrigerating machine for a refrigerating container in which stays 14, 14, ... Are interposed, the internal casing 10 and the stays 14, 14, ... Are integrally formed by injection molding of synthetic resin. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing structure for a refrigerating machine for a refrigerating container.

[0002]

2. Description of the Related Art In recent years, the use of refrigerating containers for marine transportation has been increasing due to the advantage of mass transportation.

A typical refrigerating container is shown in FIGS.
As shown in FIG. 3, it comprises a container box B having a luggage compartment 7 inside, and a refrigerating apparatus A for cooling the luggage compartment 7. The refrigerating apparatus A covers the one side opening of the box body 7 and separates the outside of the cabinet provided with the compressor 1, the condenser 2 and the like from the inside of the cabinet provided with the evaporator 3 and the like.
And a back plate 8 forming a partition wall with the luggage compartment 7.

By the way, in the case of a refrigerating container, the cargo is not only transported by sea but is often transported by land such as a truck, and the cargo stored in the luggage compartment 7 due to sudden braking during transportation is on the refrigeration system A side. And a large load (hereinafter referred to as end wall load P) may act on the back plate 8 that is a partition wall with the luggage compartment 7. The casing 6 is required to have a structure capable of sufficiently withstanding the end wall load P.

From the above requirements, the casing 6
Is an aluminum alloy external casing 9 that constitutes the outer wall surface.
And a casing 10 made of fiber reinforced plastic that constitutes the inner wall surface and a wooden spacer 11 for maintaining a space between the casings 9 and 10 and the casings 9 and 1
0 has a heat insulating double wall structure composed of a foamed synthetic resin heat insulating material 12 filled between 0, and between the inside casing 10 and the back plate 8, cold air passages 13, 13 to the luggage compartment 7 are provided.・
In order to secure the above, the stays 14, 14 ... Made of aluminum sheet metal extending in the vertical direction are interposed so that the end wall load P from the luggage compartment 7 side can be reliably transmitted to the highly rigid outer casing 9. The casing structure is adopted (for example,
See Japanese Patent Laid-Open No. 4-167725). Reference numeral 4 is a condenser fan, and 5 is an evaporator fan.

[0006]

However, in the case of the casing structure as described above, although the strength against the end wall load P can be secured, the number of parts increases (that is, the outside casing 9, the inside casing 10, At least four points of the spacer 11 and the stay 14), a new problem arises that the number of assembling steps is increased and the cost is increased. In particular, when the inside casing 10 is made of fiber reinforced plastic as in the above-mentioned conventional technique, it is difficult to integrally form a complicated shape, and thus it is difficult to solve the above problem.

The present invention has been made in view of the above points, and it is possible to secure sufficient strength against an end wall load while reducing the number of assembling steps and cost by integrating parts. The purpose is.

[0008]

In the basic configuration of the present invention, as a means for solving the above-mentioned problems, one side opening of a refrigerating container box B is covered and a compressor 1 and a condenser 2 are provided. A casing 6 for partitioning the outside of the cabinet from the inside of the cabinet provided with the evaporator 3, and a back plate 8 forming a partition wall with the luggage compartment 7. The casing 6 is made of a metal outside constituting an outer wall surface. A casing 9 and an inside casing 10 forming an inner wall surface, a plurality of spacers 11, 11 ... Maintaining a space between the casings 9 and 10, and a heat insulating material 12 filled between the casings 9 and 10. In addition to having a heat-insulating double-wall structure, cold air passages 13, 13 ... To the luggage compartment 7 are provided between the inside casing 10 and the back plate 8.
A plurality of stays 14 extending vertically to secure the
In a casing structure of a refrigerating apparatus for a refrigerating container having 14 ..., The inside casing 10 and the stays 14, 14, ... Are integrally formed by injection molding of synthetic resin.

In the basic configuration of the present invention, it is possible to further reduce the number of parts by integrally forming the spacers 11, 11 ... With the stays 14, 14 ,. Cost reduction is preferable, and in that case, if the cross portion of each stay 14 with the spacers 11, 11, ... Is made larger than other portions, the end wall load P is transmitted to the outside casing 9. Is preferable because it can be more surely performed.

[0010]

In the basic structure of the present invention, the following actions can be obtained by the above means.

That is, the end wall load P acting on the back plate 8 in accordance with the movement of the luggage stored in the luggage compartment 7 (for example, the movement of the luggage caused by the sudden braking during the land transportation by the truck) is: .. and spacers 11, 11 ... Integral with the inside casing 10 are reliably transmitted to the metal outside casing 8 having high rigidity. Moreover, since the internal casing 10 and the stays 14, 14, ... Are integrated, the number of parts is reduced, and the number of assembling steps at the time of assembling the casing is also reduced.

In the basic structure of the present invention, when the spacers 11, 11, ... Are integrally formed with the inside casing 10 in a state of crossing the stays 14, 14 ,. 14,14 ...
.. and the spacers 11, 11 ... Are integrated so that the number of parts and the cost can be further reduced. In that case, if the cross portion of each stay 14 with the spacers 11, 11, ... Is made larger than the other portions, the stays 14, 14, .. Is reliably transmitted, and the end wall load P is more reliably transmitted to the outside-compartment casing 8.

[0013]

According to the present invention, the inside casing 10 constituting the inside wall surface of the casing 6 for partitioning the inside and outside of the freezer for the refrigerating container, the inside casing 10 and the luggage compartment 7. Of the cold air passages 13, 13 to the baggage compartment 7 that are provided between the back plate 8 and
· A plurality of stays 1 extending vertically to secure
4 and 14 are made of a synthetic resin integrally molded product, and are accompanied by movement of luggage stored in the luggage compartment 7 (for example, movement of luggage caused by sudden braking during land transportation by a truck). End wall load P acting on the back plate 8
The stays 14, 1 integrated with the interior casing 10.
.. and the spacers 11 and 11 provided between the inside and outside casings 9 and 10 can be reliably transmitted to the highly rigid metal outside casing 8 so that the number of parts is reduced. As a result, the number of assembling steps at the time of assembling the casing can be reduced, and the strength sufficient to withstand the end wall load can be maintained, which is an excellent effect.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The refrigerating apparatus A for the refrigerating container of this embodiment is
As shown in FIG. 5, it is arranged so as to cover one side opening of the freezing container box B, and as shown in FIGS. 1 and 2, the compressor 1, the condenser 2, Evaporator 3,
It is provided with a condenser fan 4 and an evaporator fan 5.

The casing structure of the refrigerating apparatus A has a casing 6 for partitioning the outside of the refrigerator provided with the compressor 1, the condenser 2 and the condenser fan 4 from the inside of the refrigerator provided with the evaporator 3 and the evaporator fan 5. And a back plate 8 that forms a partition with the luggage compartment 7.

A recess 16 for accommodating the compressor 1, the condenser 2, the condenser fan 4 and the switch box 15 is formed in the lower portion of the casing 6. Further, between the upper part of the casing 6 and the back plate 8,
A space 17 for housing the evaporator 3 and the evaporator fan 5 is formed.

The casing 6 includes an outer casing 9 forming an outer wall surface, an inner casing 10 forming an inner wall surface, and a plurality of spacers 11, 11 ... And both casings 9 and 10
A heat-insulating double-wall structure composed of a heat-insulating material 12 filled in between is provided, and between the inside casing 10 (specifically, a position corresponding to the recess 16) and the back plate 8, A plurality of stays 14, 14 extending in the vertical direction are provided in order to secure cold air passages 13, 13 for guiding the cool air W from the space 17 to the bottom of the luggage compartment 7. . In addition, on the outer peripheral edge of the casing 6,
A mounting flange 18 that is bolted up to the rim of the box B is provided so as to integrally project with the outside casing 9.

The upper and lower ends of the back plate 8 and the box B
A suction air passage 19 from the luggage compartment 7 to the space 17 and an outlet air passage 20 from the cold air passages 13, 13 ... To the luggage compartment 7 are formed between the inner surface and the inner surface.

Therefore, the air sucked from the luggage compartment 7 into the space 17 through the suction air passage 20 is cooled in the process of passing through the evaporator 3 to become the cold air W, and the cold air passage 13,
After being guided to 13 ..., the baggage that is blown out from the blowout air passage 20 to the luggage room 7 and is stored in the luggage room 7 is to be frozen and stored.

Further, in this embodiment, the condenser 2 is arranged in a front-lowering posture, and the outer casing 9 supports the inner end of the condenser 2. A step portion 21 is formed. By forming the step portion 21, the rigidity of the end wall load acting portion of the outside-compartment casing 9 is enhanced.

Therefore, in this embodiment, as shown in FIG. 3, the inside casing 10 and the spacer 1 are
1, 11 ... and the stays 14, 14 ... are injection molded articles of synthetic resin [eg, RIM molded articles such as PDCPD (polydicyclopentadiene) that is prepared by blending two liquids and pouring into a molding die] Are integrally formed by. Here, the spacers 11, 11, ... And the stays 14, 1
4 and ... are integrally formed in a crossed state, and the crossed portions of both are circular portions 22, 22 ... Further, the circular portions 22, 22, ... Also serve as mounting portions for fixing the back plate 8. By forming the circular portion 22, the load can be reliably transmitted from the stay 14 to the spacer 11. In addition, this circular portion 2
It is desirable that 2 has a size that does not become a resistance of the cold air W flowing through the cold air passage 13.

The heat insulating material 12 is made of expanded synthetic resin, and after the internal casing 10 is assembled to the external casing 9, the expanded synthetic resin is injected into the space between them to foam. It is supposed to be filled.

In the present embodiment, the inside casing 10 has evaporator support frames 23, 23 located on both sides, side stays 24, 24 located at inner ends of the evaporator support frames 23, 23, and Fixing bases 25, 25 and 26, 26 for fixing both side ends and the central portion of the evaporator 4, a drain pan 27, a sensor mounting base 28, a seal packing mounting plate 2
9 (see FIG. 4) is integrally molded. Ventilation ports 34, 35 are formed in each of the evaporator support frames 23 to connect the suction side and the outlet side of the evaporator 3 to the luggage compartment 7. Therefore, in the case of the present embodiment, the air in the luggage compartment 7 is sucked into the suction side of the evaporator 3 from both the suction air passage 19 and the ventilation port 34, while the cool air from the blowing side of the evaporator 3 is sucked in. Is the blowout air passage 20 and the ventilation port 3
It is supposed to be blown out into the luggage compartment 7 from both of 5 and.

As shown in FIG.
As shown in, the seal packing 30 for maintaining the airtightness between the casing 6 and the box B is attached by the rivets 31. With this configuration, most of the components inside the refrigerator are integrated, which greatly contributes to reduction of the number of components, reduction of assembly man-hours, and cost reduction.

In the drawings, reference numeral 32 is a service opening, 33
Is a guard member.

In the casing structure of the refrigerating apparatus for the refrigerating container configured as described above, the following effects can be obtained.

The end wall load P acting on the back plate 8 due to the movement of the luggage stored in the luggage compartment 7 (for example, the movement of the luggage caused by the sudden braking during the land transportation by the truck) is the inside of the warehouse. .. and spacers 11, 11 ... Integral with the casing 10, and are reliably transmitted to the highly rigid metal outside casing 8.

Moreover, the members for supporting the inside casing 10 and the evaporator 3 (that is, the evaporator support frames 23, 23 and the evaporator support pedestals 25, 26) and the members for transmitting the end wall load P to the outside casing 9. (That is, the spacers 11, 11, ... And the stays 14, 14, ..), the sensor mounting base 28, and the seal packing mounting plate 29 are integrated by injection molding of synthetic resin, so the number of parts is reduced, The number of assembling steps at the time of assembling the casing can be reduced and the cost can be significantly reduced.

The invention of the present application is not limited to the configuration of the above-mentioned embodiment, and it goes without saying that the design can be appropriately changed without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is a front view of a refrigerating apparatus for a refrigerating container according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a refrigerating apparatus for a refrigerating container according to an embodiment of the present invention.

FIG. 3 is a perspective view showing an internal casing of a refrigerating apparatus for a refrigerating container according to an embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view showing the sealed portion between the internal casing and the box body in the refrigerating apparatus for a refrigerating container according to the embodiment of the present invention.

FIG. 5 is a perspective view showing an overall configuration of a general refrigeration container.

FIG. 6 is a vertical sectional view of a conventional refrigerating apparatus for a refrigerating container.

[Explanation of symbols]

1 is a compressor, 2 is a condenser, 3 is an evaporator, 6 is a casing, 7 is a luggage compartment, 8 is a back plate, 9 is an outside casing, 10
Is an internal casing, 11 is a spacer, 12 is a heat insulating material, 1
3 is a cold air passage, 14 is a stay, 22 is a circular portion, A is a refrigerating device, and B is a box.

Claims (3)

[Claims] 1. A refrigerating container box body (B) is provided with a compressor (1) and a condenser (2) and an inside of the refrigerator which covers an opening on one side and which is provided with an evaporator (3). A casing (6) for partitioning and a back plate (8) forming a partition between the luggage compartment (7) are provided, and the casing (6) is provided with a metal outside casing (9) forming an outer wall surface. An internal casing (10) constituting the wall surface and the both casings (9),
A plurality of spacers (11) for maintaining a space between (10),
(11) ··· and a heat insulating material (12) filled between both casings (9) and (10) to form a heat insulating double wall structure, and the inside casing (10) and the back plate (8) Between the cold air passages (13) and (1) to the luggage compartment (7).
3) ··· is a casing structure of a refrigerating machine for a refrigerating container, which is provided with a plurality of stays (14), (14) · · extending vertically to secure the inside casing (9). A casing structure for a refrigerating machine for a refrigerating container, characterized in that the stay and the stays (14), (14), ... Are integrally formed by injection molding of synthetic resin. 2. The stays (1) are attached to the spacers (11), (11) ... With respect to the internal casing (10).
4. The casing structure for a refrigerating machine for a refrigerating container according to claim 1, wherein the casing structure is integrally formed in a state of crossing 4), (14) ,. 3. The refrigerating apparatus for a refrigerating container according to claim 2, wherein a cross portion of each of the stays (14) with the spacers (11), (11) ... Is made larger than other portions. Casing structure.