JPS62119382A - Freshness storage shed - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a fresh food storage for keeping fresh food cool while maintaining its humidity.

[Technical background of the invention and its problems] In general, vegetables, fruits, and flowers wilt between being harvested in the field and being shipped to warm markets, especially in the summer.
Because it quickly wilts and its value drops, it is sometimes kept cold until it is shipped.

As shown in Figure 4, conventional refrigerators have a heat-insulating structure inside the refrigerator.
A heat absorption part 3 of the cooler is attached to the upper part of the refrigerator, a circulation fan is attached to this heat absorption part 3, and the inside of the refrigerator is cooled by the refrigerant passing through the heat absorption part 3.

The refrigerant that has absorbed heat by the heat collection is guided outside the refrigerator, compressed by the compressor 3, and then cooled by the radiator 6.

It passes through the expansion valve 7 and circulates again to the heat absorbing section 3 inside the refrigerator.

Therefore, since conventional refrigerators are directly cooled by refrigerant, the inside of the refrigerator can be cooled.

The heat absorption part 3 also serves as a dew condensation surface, and the air inside the refrigerator that comes into contact with this part condenses due to the temperature difference and is gradually dehumidified. For this reason, vegetables that contain a large amount of water have the disadvantage that when they come into contact with the dry air inside the refrigerator, the water evaporates and gradually wilts.

In addition to temporarily keeping vegetables cool in the field, when transporting them to the market, they are kept cool in refrigerators, but the water evaporates and wilts, reducing the product value. There was a problem with the decline.

[Purpose of the invention]

The present invention eliminates such conventional drawbacks and provides a fresh storage warehouse that can simultaneously keep fresh products such as green vegetables, fruits, and flowers cold and warm to maintain their freshness for a long period of time. It is.

[Summary of the invention]

The present invention is directed to a T-frame-shaped freshwater storage cabinet that includes a water supply duct having a water supply port opened at the bottom, and a water receiving duct connected at intervals below the water supply duct and having a water intake port formed at the top thereof. A cold air outlet is provided on the side surface, a plate-shaped filter is provided therein which communicates with the water supply port, and an inside air suction port is formed by opening the upper or lower part of the fresh storage cabinet body;
A circulation fan is installed inside this, and a pump is installed to return the water in the water receiving duct to the water supply duct, and a cooler is installed to cool this circulating water. It is characterized in that the cooled water flows down the plate-shaped filter from the water receiving duct to cool and simultaneously humidify the air inside the refrigerator passing through the plate-shaped filter.

[Embodiments of the invention]

The present invention will be described in detail below with reference to three embodiments shown in the drawings.

Figures 1 to 3 show one embodiment of the present invention. Figure 1 shows a water supply duct formed in the shape of a rectangular frame, with a long hole extending in the center part K of the bottom surface along the longitudinal direction. A water supply lobe is formed, and a cover 70 is attached to the top.

/l is a water receiving duct in the shape of a rectangular frame provided at intervals below the water supply duct)&. A water receiving port /2 is formed on the upper surface of this water receiving duct)// along its longitudinal direction.

The water supply duct and the water receiving duct are connected at some of their four corners by connecting posts /3.

The main body of the freshener is a frame-shaped container with openings on all four sides and the bottom.
is configured.

The four open sides of the main body/4t of the freshener are used as cold air exhaust ports 15, and the open bottom surface is used as an inside air suction port/B.

The cold air outlet/IK is a plate filter 1 that communicates the water supply row of the water supply duct and the water intake port/2 of the water reception duct //.
7 is attached, and a dust-collecting filter /g, which is thinner than the above-mentioned filter, is attached to the inside air suction port //).

Reference numeral 19 denotes a circulation fan, which is installed inside the freshener body 4 opposite to the inside air intake port 2, and is rotated by a motor 20.

As shown in FIG. 2, a suction pump 2/ is attached to a part of the corner of the main body/lI of the freshener. This suction pump 2/ is completely inserted into the bike 3 where the shaft 2 = communicates the water supply duct g and the water receiving duct //, and as the propeller gear at the tip of the shaft 22 rotates, the suction pump 2/ is inserted into the water receiving duct //. of water, 25° --ΣF, is sucked up into the water supply duct S.

2 O is a copper vibrator through which the refrigerant of cooling 62 passes, and this is guided into the water receiving duct // through the inside of the connecting column / 3 at a part of the corner of the main body / 4 of the freshener body, and is passed through the heat absorbing part 3. As water 2S
It is supposed to cool down.

The steel pipe 2B is drawn out of the refrigerator and connected to the left side of the compressor, the radiator 6, and the expansion valve 7, thereby forming a cooler 2B.

The above-mentioned freshwater preserver main body/lI is attached to the upper part of the inside/of the refrigerator whose wall surface is insulated, and a shelf 27 is attached below this, so that perishable products placed in cardboard or plastic containers can be stored. .

In addition, in the figure, 2g is the drain provided at the bottom of the water receiving duct //, and 2? is a cardboard box.

3θ is a container, and 3/ is a water supply source.

For making Next, the function of the fresh food storage will be explained.

First, fresh produce such as vegetables, fruits, and flowers that have been harvested are packed into cardboard boxes or containers and stored on the shelves 27 of the fresh storage warehouse.

Meanwhile, operate the cooler and use water 2! While cooling, the circulation fan /9 and suction pump 2/ are also operated at the same time. In this case, the cooling temperature of the water 25 is set to about 5C, for example, at the thigh temperature.

In this state, the water 2S sucked up by the water supply duct flows out from the water supply bottom at the bottom, passes through the skin filter 7 provided at the cold air outlet 15 below, and flows down.

This plate-like filter 7 is made of porous material such as steel wool or plastic wool 5 foamed plastic to ensure sufficient ventilation holes.

While the cooled friend water is slowly flowing down this plate-shaped filter 17, the inside air suction port/
The air inside the refrigerator sucked from 6 passes vertically through a plate filter 77 provided at the cold air outlet 15, and at this time, the cooled water 25 flowing down the mesh of the filter 7 and L
+i touch and is cooled by its sensible heat. The cooled air in the refrigerator is slowly circulated inside the refrigerator to cool the perishables, and the warmed air rises and is sucked in from the air suction port B, where it is exchanged with heat through the plate filter 77. is repeated.

In this way, by repeating direct heat exchange between the cooling water 2S and the air inside the refrigerator, the temperatures of the air inside the refrigerator and the fresh products gradually become almost equal to the temperature of the cooling water 23, and the temperature of the cooling water 2S! By setting the temperature r, it is possible to adjust the temperature at which perishables are kept cold.

Also, when the high-temperature chamber air comes into contact with the cooling water 2S, the moisture in the air condenses due to the temperature difference between the two and dissolves into the cooling water 2S, but at the same time, the water 2! R also evaporates when it comes into contact with the air and becomes humidified, so overall the cold air outlet/S
The air inside the refrigerator that has passed through becomes a highly humidified state with a relative humidity of 90% or more, which is completely different from the conventional cooling method that uses only the dehumidifying effect by contact with copper pipes and fins, as in the conventional heat absorption 1 section 3.

In addition, compared to conventional heat exchange effects, the contact area between the air inside the refrigerator and the cooling water 25 serving as the refrigerant is wider, so rapid heat exchange takes place and the interior of the refrigerator can be quickly cooled to a predetermined temperature. . Furthermore, when a predetermined cold storage temperature is reached, the internal temperature of the refrigerator can be maintained constant by intermittently operating a circulation fan/decoder using a temperature sensor (not shown).

On the other hand, the cooling water 2S that has flowed down through the plate filter// while exchanging M flows down into the water receiving duct// from the water receiving port/2. The water receiving duct)// is equipped with a copper pipe 2 which becomes the heat absorbing part 3 of the cooling 62, and is a cooled cooling water pipe that cools the warmed cooling water by heat exchange with the air inside the refrigerator. 5 is returned to the water supply duct g by the suction pump 2/.

From here, the water passes through the water supply row again and flows down to the plate-shaped filter 77, whereupon it is circulated in the same manner to keep the inside of the refrigerator cold and moisturized.

Specific examples of the present invention will be described below.

(Example 1) Using the freshness storage shown in Figures 1 to 3, spinach was harvested and subjected to a freshness preservation experiment.2 Spinach was harvested on August 7th in midsummer, and the spinach was harvested on August 7th in midsummer. , 15 of that day
At the same time, they were placed in a fresh storage room and kept until 11 o'clock the next day, and the relative temperature inside the storage room, the temperature of the spinach (product temperature), and changes in quality were examined.

Prepare the spinach in a cardboard box and a plastic container 30.The container 30 is placed on the upper shelf 27 (point C in the figure), and the cardboard box 29 is placed on the middle shelf 2.
7 (dotted point in the figure), and the temperature, relative humidity, and temperature of each product were measured.

Mayu cooling water 2! I started operating the Fresh Fresh Novo at room temperature, then gradually lowered the temperature and set it to 5G. This cooling water, the temperature change in 25, the change in outside temperature, the internal temperature at the inside air inlet/B (point B in the diagram), the cold air outlet/
The temperature and relative humidity at S (point A in the figure) were measured, and the results are shown in the first column.

We also measured changes in the quality of spinach after 20 hours of freshness storage, such as freshness, wilting index, tea color, and yellowing of leaves.
The results are shown in Table 2 below.

Table 2: The evaluation index for the clothes and jacket is 5...Condition at the time of harvest 3
...Limit of merchantability 1...No commercial value As is clear from the results in the table above, after the start of operation, as the water temperature decreases, the temperature inside the refrigerator rapidly decreases, and a high humidity atmosphere develops. At the cold air outlet/3rd floor, the humidity reaches over 90 degrees within an hour of starting operation. In addition, the product temperature decreases as the water temperature decreases, and reaches a low temperature of 7 to 9 C after about 9 hours.

In addition, after being kept for 20 hours, the quality of the spinach is slightly lower than when it was harvested in terms of freshness and wilting index, but the spinach, which had withered just before being put into the storage room, came back to life after being kept cool and humidified (Example 2) Cucumbers grown under the same operating conditions as iiQ Example 1 above were also preserved! #Kept in a warehouse for 20 hours.

In this case as well, as the water temperature drops, the temperature drops sharply and the humidity becomes high, and after the start of freshness preservation.

The humidity was 90% or more in one hour, and the product temperature was 10C or less after 8 hours.

In addition, as shown in Table 3, the quality of cucumbers after 20 hours is almost the same as after co-harvest in terms of freshness, shrivel index, and hardness. It was confirmed that there was a stirring effect.

Table 3 East Note that in the above table, the freshness, shrivel index, and hardness evaluation index were based on the same criteria as in Example 1.

In addition, in the above example, the water from the water receiving duct) & = 5 is directly
Although a structure is shown in which the water is cooled in the water receiving duct g, a structure may also be adopted in which the water 25 in the water receiving duct g is led outside the refrigerator, where it is cooled by the cooling device 62, and then returned to the water supply duct g by a circulation pump. .

Further, in the above embodiment, the inside air suction port/A is provided at the bottom of the freshener main body/DA, but it may be provided at the top. Furthermore, a ceiling net is installed horizontally on the upper side of the chamber l below the main body /4 to suppress the circulation of cold air and prevent wind from hitting the perishable items stored in the chamber / due to natural convection. It may also be kept cold. Further, the temperature inside the refrigerator may be adjusted only by the temperature sensor inside the refrigerator without separately adjusting the temperature of the cooling water.

In the above embodiment, a fixed type fresh storage is shown, but it can also be applied to a fresh storage stored on the loading platform of a vehicle to maintain freshness during transportation. In this case, it is necessary to provide a separate water tank for replenishment.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to obtain a fresh food storage that can simultaneously keep fresh products such as vegetables, fruits, and flowers cool and moisturized, and maintain their freshness well over a long period of time.

[Brief explanation of drawings]

Figures 1 to 3 show one embodiment of the present invention, in which Figure 1 is a half-sectional view of the main body of the preserver, Figure 2 is a longitudinal sectional front view showing a part of the corner of the main body of the preserver, FIG. 3 is an explanatory diagram showing a schematic configuration of a fresh storage warehouse. FIG. 4 is an explanatory diagram showing a schematic configuration of a conventional cold storage. /...Inside the warehouse =...Cooler 3...Heat absorbing section S...Water supply duct de...Water supply port
l/...Water intake duct/2...Water intake l
lI...Fresh preserver body 15...Cold air outlet /6.
・Inside air suction port/7...Plate filter/q...
Circulation fan, 2/... suction pump, 2. ! i-
...Water 27...Shelf

Claims (1)

[Claims] Cold air is exhausted from the open side of the frame-shaped freshener main body, which is composed of a water supply duct with a water supply port opened at the bottom, and a water receiving duct connected at intervals below the water supply duct with a water receiving port formed at the top. A plate-shaped filter is provided here as an outlet and communicates the water supply port and the water receiving port, and an inside air suction port is formed by opening the upper or lower part of the main body of the freshener, and a circulation fan is provided inside this air suction port. A fresh food storage warehouse, characterized in that a pump is installed to return water in a water duct to a water supply duct, a cooler is provided to cool this circulating water, and the main body of the fresh food storage device is provided in an upper part of an insulated storage interior.