JP2505369Y2 - Pre-cooling device and pre-cooling vehicle for vegetable fresh products - Google Patents

Description

[Technical field] The present invention relates to a pre-cooling device and a pre-cooling vehicle for pre-cooling fresh fruits such as fruits, vegetables and cut flowers immediately after harvest.

"Prior art and its problems" It is desirable to maintain the freshness of these plant fresh products immediately after harvesting to a specific low temperature above the freezing point. At low temperatures, physiological effects such as respiration and transpiration are suppressed, and a bacteriostatic effect on the reproduction and activity of harmful microorganisms is obtained, and deterioration of freshness can be delayed. For example, in the case of fruit, when the temperature of the product at 20 ℃ rises by 10 ℃, the respiratory volume increases 2.4 times, and when it decreases by 10 ℃, the respiratory volume becomes 1
Reduced to / 2. Also, for example, the product temperature is 30 ℃ for 1 hour, the same 9 ℃
The storage conditions are the same for 5 days and at -0.5 ° C for 17 days.

In general, the pre-cooling device mounted on a container vehicle is used for lowering the temperature of fresh plant-derived products immediately after they are harvested. However, the conventional precooling device has a problem that the cooling rate is very slow because the cooler is simply arranged in the container (storage room). Not only that, uneven cooling of the product or condensation on the surface of the product caused mold and decay.

A method of precooling with water is also known, but there is a fatal problem that it cannot be precooled after being packed in a cardboard box. In addition, there is a problem that the product is damaged by the water flow and the spoilage bacteria grow due to the attached water.

[Object of the Invention] The present invention aims to obtain a precooling device that can be mounted on a container vehicle and that can quickly reduce the product temperature.

[Summary of device] The pre-cooling device for fresh plant products of the present invention is basically a cooling device using cold air, and by effectively circulating the cold air, the product temperature of the pre-cooled product can be quickly lowered. It was done like this.

The device of the present invention comprises an underfloor suction duct by arranging a perforated floor plate having a large number of suction holes on a floor surface in a precooling chamber having an opening / closing door at a rear portion (one end), and the underfloor suction duct is
It communicates with the suction side of the cooler provided in the front part (the other end part) in the pre-cooling chamber, the outlet of the cool air discharged from the cooler is opened to the upper part of the storage chamber, and further to the rear part of the perforated floor plate, that is, the door side. It is characterized in that a winding roll of the hole-blocking sheet is provided at the position.

According to this device, a cold air flow that circulates from the upper part to the lower part of the precooling chamber is generated, so that the temperature of the stored precooled product can be quickly lowered. When the pre-cooled product is not placed on the rear part of the perforated floor plate, the hole-blocking sheet closes the suction hole of the perforated floor plate in the part where the pre-cooled product is not present, and prevents the cold air flow from short-circuiting.

"Embodiment of the Invention" The present invention will be described below with reference to illustrated embodiments. 1 to 4 show a first embodiment of the present invention.
The precooling device 11 of the present invention, which is used by mounting it on a container car (precooling car) 10 having a self-driving function, is formed in a rectangular shape by a heat insulating outer wall 12 and has a hinge at its rear part (one end).
An opening / closing door 13 is provided so that it can be opened and closed by 13a. This outer wall 1
A precooling chamber 14 is formed by 2 and the opening / closing door 13. Reference numeral 15 is a lock device for the opening / closing door 13.

In the pre-cooling chamber 14, a lower part thereof is provided with a porous floor plate 16, and between the porous floor plate 16 and the outer wall 12 on the lower surface thereof,
An underfloor suction duct 18 is formed. The porous floor plate 16 has a large number of suction holes 19 on its entire surface.

In the front part of the pre-cooling chamber 14, a vertical compartment wall 21 forms a cooler storage chamber 22. The cooler storage chamber 22 has a lower part communicating with the underfloor suction duct 18 and an upper part serving as a cool air outlet 23.

A cooler 24 and a blower 25 are stored in the cooler storage chamber 22. The cooler 24 is cooled by a refrigeration cycle cooling device 27 which is also mounted on the container car 10. The blower 25 supplies the cool air cooled by the cooler 24 toward the cool air outlet 23 to generate a cool air flow from the upper part to the lower part in the pre-cooling chamber 14.

On the rear part of the precooling chamber 14, that is, on the floor surface on the side of the opening / closing door 13, a winding roll 31 of the shielding sheet 30 is provided. The winding roll 31 supports a winding shaft 32 rotatably in the left-right direction in the lower rear portion of the precooling chamber 14, and a shielding sheet 30 is wound around the winding shaft 32. By pulling out from the winding shaft 32, it is possible to cover a large number of suction holes 19 of the porous floor plate 16 from the rear part.

The pre-cooling device 11 having the above-mentioned configuration is arranged such that the fresh plant product (pre-cooled product) P immediately after harvesting is placed on the perforated floor plate 16 at an appropriate interval,
In addition, the pre-cooling chamber 14 is stored in order from the front. When the cooler 24, the blower 25, and the refrigeration cycle cooling device 27 are driven during or after the storage, a cold air flow in the direction indicated by the arrow is generated in the precooling chamber 14. That is, the cool air cooled by the cooler 24 is discharged from the upper part of the cool air outlet 23 into the precooling chamber 14 by the blower 25, and after descending in the precooling chamber 14, the perforated floor plate.
It enters into the underfloor suction duct 18 through 16 suction holes 19 and is sucked into the cooler 24 in the cooler storage chamber 22 again. The circulating cold air quickly cools the pre-cooled product P.

When the pre-cooled product P is not placed behind the porous floor plate 16,
The winding shaft 32 is pulled out from the winding roll 31 to close the suction hole 19 of the perforated floor plate 16 on which the pre-cooled product P is not placed. As a result, cold air is prevented from entering the underfloor suction duct 18 through the suction hole 19 which is easily flown in a non-resistance (short) state, and the stored precooled product P
Can be cooled quickly as well.

The pre-cooled product P, which has been cooled to a predetermined temperature by pre-cooling, is transferred to another refrigerator for storage, or further transported to a remote place.

 Next, the effects of the present invention will be described with reference to experimental examples.

[Experimental Example 1] After harvesting sweet corn (product temperature 20 ° C), immediately store it in the pre-cooling device of the present invention and transfer it to another refrigerating vehicle (temperature 7 ° C ± 5 ° C) in about 2 hours. Cooled to 3 ° C. The sweet corn was transported in the same refrigerated car (total transport time 89 hours).

As a first control section, it was cooled to about 3 ° C. in about 8 hours by a conventional pre-cooling device and transported by the refrigerating vehicle (the same transport time).

As a second control section, it was stored in the same refrigerated vehicle about 8 hours after harvest without being pre-cooled and transported (the same for the entire transportation time).

Table 1 shows the reduction in weight (% by weight) after the transportation and the change in appearance.

Experimental Example 2 With respect to spinach, the same transportation experiment as in Experimental Example 1 was conducted. The results are shown in Table 2.

[Experimental Example 3] The same transportation experiment as in Experimental Example 1 was performed on the radish. The results are shown in Table 3.

[Effect of the invention] As described above, according to the pre-cooling device for plant perishables of the present invention, a circulating flow of cold air can be generated in the pre-cooling chamber, so that the plant perishables placed in the pre-cooling chamber can be promptly cooled. It can be cooled (pre-cooled). Therefore, it is possible to delay the rate of deterioration of freshness and provide a plant-based fresh product with good freshness even after storage for a relatively long time. Furthermore, since the winding roll of the sheet having a hole is provided in the rear part of the porous floor plate, when the pre-cooled product is not placed on the rear part of the porous floor plate, the suction hole of the porous floor plate in the part without the pre-cooled product is closed, It is possible to prevent the cold airflow from short-circuiting and perform efficient precooling.

[Brief description of drawings]

1 to 4 show a first embodiment of a pre-cooling device for fresh vegetable products of the present invention, and FIG. 1 shows I-I of FIG.
2 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG. It is a side view of a container vehicle (precooling vehicle). 10 …… Container vehicle, 11 …… Precooling device, 12 …… Outer wall, 13…
… Opening / closing door, 14 …… precooling room, 16 …… perforated floor plate, 18 …… underfloor suction duct, 19 …… suction hole, 21 …… vertical partition wall, 22 ……
Cooler storage room, 23 …… Cold air outlet, 24 …… Cooler, 25…
… Blower, 27 …… Refrigerating cycle cooling device, 30 …… Sheet shield sheet, 31 …… Winding roll, 32 …… Roller.

Claims (2)

(57) [Scope of utility model registration request] 1. An underfloor suction duct is constructed by arranging a perforated floor plate having a large number of suction holes on a floor surface in a precooling chamber having an opening / closing door at one end, and the underfloor suction duct is used for other precooling chambers. It is connected to the suction side of the cooler installed at the end, the outlet of the cool air discharged from the cooler is opened in the upper part of the storage chamber, and it is located on the opening / closing door side on the floor of the pre-cooling chamber and the suction hole of the perforated floor plate. A pre-cooling device for fresh vegetable products, characterized in that it is provided with a winding roll of a perforated sheet capable of sequentially covering the above. 2. A precooling vehicle equipped with the precooling device according to claim 1 and capable of traveling by itself.