JPH0666472A - Freezing container - Google Patents

Abstract

PURPOSE:To prevent maturation or freshness of vegetables contained in a container from being lowered by mounting an ethylene removal unit in the container. CONSTITUTION:A freezing unit 100 is mounted on one end of a container 1 in which a package C of vegetables is contained for forcedly circulating air in the container 1 and simultaneously cooling the inside of the container 1, and a carton type ethylene removal unit 50 connected with the freezing unit 100 through an electrical cable 57 is mounted on the side of a door 45 in the container 1. By use of the ethylene removal unit 50 ethylene discharged from the vegetables located in air in the container 1 is removed. Hereby, freshness of the vegetables contained in the container 1 is prevented from being deteriorated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freezing container suitable for storing fruits and vegetables and transporting them while refrigerating.

[0002]

2. Description of the Prior Art A conventional refrigeration container is shown in FIG. The container 1 has a rectangular parallelepiped shape, and a refrigeration unit 100 is attached to one end wall 2 of the container 1. Container 1
The cargo such as fruits and vegetables is stored in the container 1 through the door 45 provided on the other end wall 2 of the container 1 and the refrigeration unit 100 is operated to forcibly circulate the air inside the container 1 and at the same time the container 1 The container 1 is mounted on a ship, a truck, a railroad vehicle or the like and transported while cooling the air and maintaining the temperature at an arbitrarily set temperature within the range of -25 ° C to + 25 ° C.

A schematic structure of the refrigerating unit 100 is shown in FIG. 4, where (A) is a front view, (B) is a vertical sectional view taken along the line BB of (A), and (C) is (B). It is a cross-sectional view taken along the line CC in FIG. The gas refrigerant discharged from the compressor 3 enters the water cooling condenser 5 or the air cooling condenser 4 and is condensed and liquefied there. The liquid refrigerant enters the electronic expansion valve 9 through the dryer 7 and the strainer 8 and is throttled there to undergo adiabatic expansion to become a gas-liquid two-phase refrigerant. This refrigerant enters the evaporator 10,
Here, the inside air is cooled to evaporate and vaporize.
Then, this gas refrigerant returns to the compressor 3 via the accumulator 13.

The air inside the container 1 is supplied from the air suction port 14 to the evaporator section 15 as indicated by the solid arrow.
Enter the evaporator fan driven by the motor 11.
After being urged by 12 and cooled in the process of passing through the evaporator 10, the container 1 is passed through the air passages 16 and the blowing chambers 18 from the gap between the T-shaped ventilation rails 43 provided on the bottom surface of the container 1. It is blown out inside.

When the air-cooled condenser 4 is used, the motor
The condenser fan 6 is driven by 17. Then, after the temperature of the outside air is increased by exchanging heat with the gas refrigerant in the process of passing through the air-cooled condenser 4, as indicated by the dashed arrow,
The capacitor fan 6 is energized and discharged.

When using the water-cooled condenser 5, a water supply valve and a drain pipe (not shown) are connected to the cooling water inlet 19 and the cooling water outlet 20 to open the water control valve 21. Then, the condenser fan 6 is stopped. Then, the cooling water supplied from the water supply pipe enters the water cooling condenser 5 through the water pipe (not shown) from the cooling water inlet 19 and heats up there by exchanging heat with the gas refrigerant. The water is discharged from the cooling water outlet 20 through the water valve 21 and the drain pipe.

The drain condensed on the evaporator 10 is dropped on the drain pan 22 and is passed through the drain hose 23 to the drain port.
Emitted from 24.

Reference numeral 41 denotes an inner and outer partition wall made of a heat insulating material, which is fastened to the end wall 2 of the container 1 by a flange formed on the entire circumference thereof. A condenser section 42 is formed on the outside of the partition wall 41 in the center of the lower portion thereof, and an evaporator section is formed on the inside of the partition wall 41 and above the condenser section 42.
15, an air passage 16 is formed on both sides, and an outlet chamber 18 is formed below. An evaporator 10, an evaporator fan 12, etc. are installed in the evaporator section 15. A compressor 3, an air-cooled condenser 4, a condenser fan 6 and the like are installed in the condenser section 42.

Reference numeral 25 is a control box, 26 is a solenoid valve for liquid injection for injecting and cooling a liquid refrigerant into the compressor 3, 27 is a 200V class power plug,
28 is a 400V class power supply plug, 29 is a power transformer, 31 is an intake air temperature sensor for detecting the temperature of the air in the refrigerator that is sucked into the evaporator 10, 30 is an insertion port of a thermometer for checking the temperature sensor 31, 33 is a blown air temperature sensor for detecting the temperature of the air blown from the evaporator 10, 32 is an insertion port of a thermometer for checking the temperature sensor 33, and 34 is an outlet for detecting the refrigerant outlet temperature of the evaporator 10. A temperature sensor, 35 is an overheat prevention sensor, 36 is a discharge pipe temperature sensor for detecting the temperature of the discharge pipe of the compressor 3, 37 is an outside air temperature sensor for detecting the temperature of the outside air flowing into the air cooling condenser 4, and 38 is An inspection lid for inspecting the equipment in the evaporator section 15, 39 is a handle for attaching and detaching the inspection lid 38, and 40 is a ventilation device.

[0010]

In the conventional refrigerating container described above, when fruits and vegetables are stored in the container 1,
There is a problem that ethylene discharged from fruits and vegetables accelerates aging of fruits and vegetables or aging of fruits and vegetables, thereby reducing freshness of fruits and vegetables.

[0011]

The present invention has been invented to solve the above-mentioned problems, and the gist of the first invention is to provide at least one end of a container for storing cargo such as fruits and vegetables. In a refrigeration container in which a refrigeration unit for forcibly circulating and cooling the air in the container at the same time is installed, a carton-shaped ethylene removal unit connected to the refrigeration unit via an electric cable is installed in the container. It is a freezing container characterized by being stowed on the door side of.

The gist of the second invention is to install a refrigeration unit for forcibly circulating and cooling the air inside the container at least at one end of the container in which cargoes such as fruits and vegetables are stored. In the refrigeration container, an ethylene removal unit having an exhaust port connected to an air suction port of the refrigeration unit is detachably installed in the refrigeration unit.

[0013]

In the first aspect of the invention, the ethylene removal unit is stacked on the door side of the container and connected to the refrigeration unit via the electric cable, and the ethylene removal unit removes ethylene from the air in the container.

In the second aspect of the invention, the ethylene removal unit is installed in the refrigeration unit so that its exhaust port is connected to the air intake port of the refrigeration unit to remove ethylene in the air in the container.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIG. A carton type ethylene removing unit 50 is stacked on the door 45 side in the container 1, and the ethylene removing unit 50 is connected to the refrigeration unit 100 via a cable 57.
Carton type unit body 51 of ethylene removal unit 50
An ultraviolet lamp 52, a fan 53, and a motor 56 for driving the ultraviolet lamp 52 are built therein, and an air intake 54 and an exhaust port 55 are formed in the unit main body 51.

After opening the door 45 and loading a large number of packages C of fruits and vegetables into the container 1, the ethylene removal unit 50 is loaded on the packages C on the side of the door 45, and this is frozen via the electric cable 57. Connect with Unit 100. Then, when electricity from the refrigeration unit 100 is applied to the ultraviolet lamp 52 and the motor 56 via the electric cable 57, the air in the container 1 is introduced into the unit main body 51 by the fan 53 via the air inlet 54, where the ultraviolet light is emitted. Ozone is generated from oxygen in the air by being irradiated with ultraviolet rays having a wavelength of 184.9 nm projected from the lamp 52. This ozone kills bacteria and the like floating in the air and oxidizes ethylene to convert it into an ethylene compound. Excess ozone is decomposed by being irradiated with ultraviolet rays having a wavelength of 253.7 nm projected from the ultraviolet lamp 52 to generate oxygen and nascent oxygen. Oxygen in this nascent stage oxidizes the ethylene remaining in the air and converts it into an ethylene compound. The air from which ethylene has been removed in this way is returned to the container 1 through the exhaust port 55.

A second embodiment of the invention is shown in FIG. In this second embodiment, the exhaust port 55 of the ethylene removal unit 50 has the air intake port 14 of the refrigeration unit 100.
It is installed detachably to the refrigeration unit 100 so as to be connected to. And this ethylene removal unit
The fan 50 does not include the fan 53 and the motor 56 that drives the fan 53.

When storing fruits and vegetables in the container 1, the ethylene removing unit 50 is installed in the refrigeration unit 100 prior to this. And the refrigeration unit 10
The wavelength is 184.9nm from the UV lamp 52 while driving 0
And irradiate with 253.7nm ultraviolet light. Then, as the evaporator fan 12 is driven, the air in the container 1 enters the unit main body 51 through the air intake port 54, where the ultraviolet light emitted from the ultraviolet lamp 52 removes ethylene in the air and then exhausts the air. After entering the evaporator section 15 from the mouth 55 through the air suction port 14, being urged by the evaporator fan 12, and being cooled by passing through the evaporator 10, the air is passed through the air passage 16 and the blowout chamber 18 into the container 1. Return.

In each of the above embodiments, when a person goes in and out of the container 1, a metal catalyst such as activated carbon, iron, manganese, or an ozonizer made of these metal oxide catalysts is used as a downstream stream of the ultraviolet lamp 52. It is desirable to install it on the side to decompose ozone remaining in the air into oxygen and the like to render it harmless.

[0020]

According to the first aspect of the present invention, when fruits and vegetables are stored in the container, ethylene in the air in the container can be removed by loading an ethylene removal unit in the container, so that the freshness of the fruits and vegetables can be prevented from decreasing. sell. And since the ethylene removal unit has a carton shape, it can be stacked in the same way as packing of fruits and vegetables, and
If this ethylene removing unit is stowed on the door side, the ethylene removing unit can be stowed after the fruits and vegetables are stowed, which makes it extremely easy to stow the fruits and vegetables and the ethylene removing unit.

Further, when the cargo other than fruits and vegetables is stored in the container, it is not necessary to load the ethylene removing unit, and therefore, the ethylene removing unit does not interfere with the loading and unloading of this kind of cargo into the container. Also,
Since the ethylene removal unit is connected to the refrigeration unit via an electric cable, it is not necessary to separately provide a power supply and a power supply mechanism for operating the ethylene removal unit.

In the second aspect of the invention, since the ethylene removal unit is installed so that its exhaust port is connected to the air suction port of the refrigeration unit, it is not necessary to provide an air circulation fan in the ethylene removal unit, and therefore The ethylene removal unit can be simplified and its cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a second embodiment of the present invention with a part thereof omitted.

FIG. 3 is a schematic vertical sectional view of a conventional refrigerating container.

FIG. 4 shows a schematic configuration of a conventional refrigeration unit, (A)
Is a front view, (B) is a longitudinal sectional view taken along the line BB of (A), (C)
FIG. 6B is a transverse sectional view taken along the line CC of FIG.

[Explanation of symbols]

 1 container 100 refrigeration unit 45 door 50 ethylene removal unit 57 electric cable

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location A23B 7/148 9281-4B 9281-4B A23B 7/148

Claims (2)

[Claims] 1. A refrigerating container in which a refrigerating unit for forcibly circulating and cooling the air inside the container at the same time is mounted on at least one end of a container for storing cargo such as fruits and vegetables. A refrigeration container characterized in that a carton-type ethylene removal unit connected via a cable is stacked on the door side of the container. 2. A refrigerating container in which a refrigerating unit for forcibly circulating and cooling the air inside the container at the same time is mounted on at least one end of a container for storing cargo such as fruits and vegetables. A refrigerating container characterized in that an ethylene removing unit having an exhaust port connected to a suction port is detachably installed on the refrigerating unit.