JPH08159639A - Loading box of freezer vehicle - Google Patents

Abstract

PURPOSE: To prevent a rate of utilization of volume within a loading box from being reduced even if an evaporator is arranged within the loading box by a method wherein the evaporator for a freezing facility is installed at a recess formed at a thermal insulating layer part of a wall surface and an outer surface of the evaporator is arranged at a position where it is not projected out of a substantial same plane as that of the wall surface. CONSTITUTION: A ceiling 8 has a structure in which a thermal insulating layer 12 made of a synthetic resin foam material is arranged inside a thin metallic plate 11 provided with a corrugation at a longitudinal direction of a loading box 4 as required and either the synthetic resin or wood 13 is arranged in tension inside the thermal insulation layer. A front end of the ceiling 8 is provided with a recess 14 formed with the thermal insulation layer 12 being formed thin. An evaporator 15 formed thin is fixed in the recess 14. The evaporator 15 has a thin-type blower driven by a thin flat plate-type electrical motor and a gasifying part for the refrigerant is also formed into a thin shape. Accordingly, a lower surface of the evaporator 15 becomes approximately the same flat surface as the inner surface of the ceiling 8 and then a sufficient thermal insulating operation can be assured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a cargo box for transporting frozen materials of a truck such as a van truck and a ban trailer.

[0002]

2. Description of the Related Art Frozen foods and chilled foods are carried by a truck such as a van truck or a bun trailer equipped with a cargo box for carrying frozen products. A packing box for transporting frozen products is, for example, as disclosed in Japanese Utility Model Publication No. 4-46882.
An evaporator is provided inside a cargo box surrounded by a wall surface, a floor surface, and a ceiling made of a heat insulating material, and a refrigeration capacitor unit is provided outside the cargo box, and is cooled by the refrigeration capacitor unit. The refrigerant is sent to the evaporator, where the refrigerant evaporates to remove the heat inside the cargo box and lower the temperature inside the cargo box.

[0003]

The cargo box for transporting frozen products disclosed in the above-mentioned publication is provided with an evaporator along the front wall of the refrigerator in order to increase the volume utilization rate in the cargo box. ing. If such a structure is adopted, the inside of the storage can be used as a cubic shape, so that the volume utilization rate can be improved for a load such as a cardboard box. However, since the evaporator is still in the packing box,
The volume in the packing box is reduced by the amount of the evaporator. In order to avoid such an inconvenience, as shown in FIG. 9 of the above publication or Japanese Utility Model Laid-Open No. 4-43778, the evaporator is housed in a small chamber protruding from the upper end of the front wall of the luggage box. Attempts have also been made,
In such a method, it is necessary to provide a special small room projecting from the front wall portion, which causes inconvenience such as an increase in manufacturing cost of the luggage box. Further, in the case where the rear wall surface has a door for cargo handling, when the door is opened during cargo handling, there is also a disadvantage that cold air in the refrigerator escapes to the outside.

The present invention is intended to eliminate the above technical inconvenience, and its object is to load an evaporator in a structure of a cargo box for transporting frozen materials of a truck such as a van truck and a ban trailer. It is an object of the present invention to provide a refrigerator car load box in which the volume utilization rate in the load box does not decrease even if it is provided inside the box.

[0005]

According to the present invention, in a refrigerating packing box attached to a cargo bed of a vehicle, the surrounding six sides are bent by wall surfaces provided with a heat insulating layer to form a heat insulating packing box. Together with forming a recess in the heat insulating layer portion of the wall surface, the evaporator for the refrigeration equipment is arranged in the recess so that the outer surface of the evaporator does not protrude from the substantially same plane as the wall surface or is arranged at a position inside thereof. This is a basic structural requirement, and the wall surface may be any of the ceiling, front wall, and side wall. Further, the number of evaporators provided is not limited to one, and a plurality of evaporators may be provided.

[0006]

Since the outer surface of the evaporator does not protrude from the substantially same plane as the wall surface or is located at the inner side of the wall surface, there is no inner surface of the packing box that projects inwardly. Despite being provided inside, the volume utilization rate inside the packing box does not decrease.

[0007]

An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a van type truck in which a refrigerating packing box is attached to the truck, and FIG. 2 is a top view thereof.
Only the packing box is shown broken. These FIG. 1 and FIG.
In the figure, reference numeral 1 is a truck, and a luggage carrier 3 is provided behind the cabin 2. On top of the loading platform 3 is a loading box 4
Is attached. This packing box 4 has a front wall 5, a rear wall 6, a side wall 7, a ceiling 8 and a floor surface 9, of which the front wall 5 and the side wall 7 are made of a synthetic resin foam material on the inside of a corrugated thin metal plate. It has a structure in which a heat insulating layer is arranged and a metal plate such as aluminum, a synthetic resin plate or a wooden plate is stretched inside the heat insulating layer, which is a conventionally known structure. Back wall 6
The door is provided with a heat insulating structure, but it is not shown in the figure because it is a well-known structure. For the floor surface 9, a heat insulating layer made of a synthetic resin foam material is arranged on a metal plate arranged on the platform, and a wood plate or a metal plate is laid on the heat insulating layer. Are arranged at intervals in the longitudinal direction.

The ceiling 8 has a heat insulating layer 12 made of a synthetic resin foam material disposed inside a thin metal plate 11 which is corrugated in the longitudinal direction of the packing box 4 if necessary, and a synthetic resin plate or a wooden board 13 is disposed inside thereof. It has a stretched structure. A depression 14 formed by thinly forming a heat insulating layer 12 at the front end of the ceiling 8.
Is provided. FIG. 3 is a partial cross-sectional view showing the recess 14 in an enlarged manner. A thin evaporator 15 is attached in the recess 14. Also,
The ceiling 8 is provided with a plurality of air circulation grooves 16 as required.

As the evaporator 15, a thin blower driven by a thin flat plate-shaped electric motor is used, and the refrigerant vaporizer portion is also formed thin, and the substantial thickness is within about 8 cm. Therefore, the thickness of the ceiling 8 is 12 cm.
Then, the thickness S from the upper surface of the evaporator 15 to the metal plate 11 which is the outer plate of the ceiling 8 is 4 cm, the lower surface (outer surface) of the evaporator 15 is substantially flush with the inner surface of the ceiling 8, and sufficient heat insulation operation is performed. Can be secured. A capacitor unit 17 is attached to the upper end of the front wall 5 of the luggage box 4. In addition, the condenser unit 17 and the evaporator 1
The heat transfer layer 12 of the ceiling 8 is connected to the refrigerant piping and electric wiring between
It is buried inside.

Next, the operation of the above embodiment will be described. First, it is assumed that the cargo 19 stored in the pallet is loaded in the cargo box 4 at the position shown by the dotted line. Since the pallet has a substantially cubic shape, it is loaded in the space inside the packing box 4. Of course, even on the lower surface of the evaporator 15, the loads 19 stored in the pallet can be efficiently loaded up to the level of the lower surface of the ceiling. When the refrigerating apparatus is operated in this state, the condenser 17 starts operating and the refrigerant is sent to the evaporator 15 and evaporated. The blower in the evaporator 15 operates to convey the warm air in the packing box 4 into the evaporator 15, and the sufficiently cooled air passes through the gap between the loads 19 and enters the packing box 4 from the evaporator 15 in the arrow direction. It is blown out and cools the inside.

FIG. 5 is a side view showing the next embodiment of the present invention, in which only the luggage box is shown broken away. In FIG. 5, the same parts as those in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be omitted.

In the case of transporting goods in a cargo box for transporting frozen products, there are cases in which products having different internal temperatures such as chilled food and frozen food are transported in one cargo box. FIG. 5 shows an embodiment used in such a case. In this embodiment, two cavities 14 are provided at the front end and the rear end of the ceiling 8 of the luggage box 4, and evaporators 15 and 15 are mounted in the two cavities 14 respectively in the same manner as in the previous embodiment. There is. In this embodiment as well, the evaporator 15 is formed thin, the lower surface of the evaporator 15 is substantially flush with the inner surface of the ceiling 8, and sufficient heat insulation operation can be secured. Reference numeral 18 is a partition wall that divides the inside of the luggage box 4 into two rooms. Of course, in this embodiment, the cool air blown from the evaporators 15 and 15 circulates in each room.

In both of the above-mentioned two embodiments, the evaporator is arranged on the ceiling, but the position of attachment of the evaporator is not limited to the ceiling, as long as the wall thickness can be secured.
For example, it may be a front wall or a side wall.

[0014]

As described in detail above, according to the present invention, the six sides of the refrigerating load box attached to the bed of the vehicle are surrounded by the wall surface provided with the heat insulating layer to form the heat insulating structure of the load box. A recess is formed in the heat insulating layer portion of the wall surface, and an evaporator for refrigerating equipment is arranged in the recess so that the outer surface of the evaporator does not protrude from the substantially same plane as the wall surface or is arranged at a position inside thereof. Since the inner surface of the packing box does not project inward, the volume utilization rate in the packing box does not decrease even though the evaporator is provided inside the packing box.

[Brief description of drawings]

FIG. 1 is a side view of a van type truck in which a refrigerating packing box is attached to the truck.

FIG. 2 is a top view of a van type truck in which a refrigerating packing box is attached to the truck.

FIG. 3 is a partial cross-sectional view showing a recess 14 in an enlarged manner.

FIG. 4 is a partial cross-sectional view of the ceiling.

FIG. 5 is a side view showing a second embodiment of the present invention.

[Explanation of symbols]

 1 ... Truck 2 ... Cabin 3 ... Package 4 ... Package 5 ... Front wall 6 ... Rear wall 7 ...・ Side wall 8 ... Ceiling 9 ... Floor 10 ... Rail 11 ... Metal plate 12 ... Heat insulation layer 13 ... Synthetic resin plate, Wood board 14-Dimple 15-Evaporator 16-Groove 17-Condenser unit 18-Partition wall 19-Luggage

Claims (5)

[Claims] 1. A refrigerating packing box attached to a cargo bed of a vehicle, wherein six surrounding surfaces are surrounded by wall surfaces provided with a heat insulating layer to form a heat insulating structure load box, and the heat insulating layer portion of the wall surface is provided. A cargo box for a refrigerating vehicle, characterized in that a recess is formed, an evaporator for refrigeration equipment is disposed in the recess, and an outer surface of the evaporator is disposed at a position where it does not project substantially flush with a wall surface. 2. The packing box for a refrigerating vehicle according to claim 1, wherein the wall surface is a front wall portion of the packing box. 3. The packing box for a refrigerating vehicle according to claim 1, wherein the wall surface is a side wall portion of the packing box. 4. The packing box for a refrigerating vehicle according to claim 1, wherein the wall surface is a ceiling portion of the packing box. 5. The refrigerating vehicle according to claim 1, wherein the recess and the evaporator provided therein are provided at a plurality of positions on a wall surface. Packing box.