JPS63109720A - Apparatus for storing perishables - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fresh produce storage device that allows fresh produce such as vegetables and fruits to be stored for a long period of time at the production site or at the distribution stage.

2. Description of the Related Art An example of the above-mentioned conventional fresh food storage device will be described below with reference to the drawings.

FIG. 3 shows a conventional fresh storage device.

In the figure, numeral 39 is a storage warehouse consisting of a prefabricated refrigerator for storing perishables. The storage 39 includes a carbon dioxide gas generator 40 for introducing carbon dioxide (Co2) into the storage.
A gas adjustment device 41 that maintains the atmosphere inside the refrigerator in a constant state is connected to each of them.

This carbon dioxide gas generator 40 generates gas by burning propane gas. Further, the gas adjustment device 41 has an adsorbent made of activated carbon that adsorbs carbon dioxide gas. The blower devices 42 and 43 are the carbon dioxide gas generating devices, and are used to circulate the air in the storage 39 through the gas regulating device.

The operation of the fresh food storage device configured as described above will be described below.

Air in the storage 39 is sent to the carbon dioxide generator 40 by a blower 42. Inside the carbon dioxide gas generator 40, oxygen (02) in the air sent in burns propane and generates Co2 as exhaust gas. Tsumashi C3H
The exhaust gas is N2 due to the reaction of 8+602→3CO□+4H20
Only Co2 and H2O are introduced into the storage 39. The gas regulating device 41 is connected to the storage 39 in parallel with the carbon dioxide gas generator, and adsorbs 002 in the excess indoor air by the carbon dioxide gas generator 40, creating an optional OA atmosphere (0) in the storage 39. N2-9os
, ci2-s % *CO2-5%), the carbon dioxide gas generator 40° and gas regulator 41 are activated to suppress the respiration of fresh food in the storage room and to prevent deterioration and oxidation caused by microorganisms. It also prevents chemical reactions such as

The problem that the invention seeks to solve However, in the above-mentioned fresh food storage device.

The exhaust gas coming out of the carbon dioxide gas generator 4o is the exhaust gas of propane combustion, and therefore contains a large amount of N20.

Furthermore, since the carbon dioxide adsorbent in the gas regulating device 41 is made of activated carbon, it is very susceptible to water, so the carbon dioxide generating device and the gas regulating device cannot be connected in series, but rather in parallel. Because of this, ethylene and SOx are emitted from carbon dioxide gas generators.

Exhaust gas containing N08 was directly discharged into the warehouse, which had a significant negative impact on the fresh produce inside the warehouse.

Therefore, in view of the above-mentioned problems, the present invention removes the impurity gas (ethylene ISO, No.) from the exhaust gas containing impurity gas from the carbon dioxide generator through a gas adjustment device, and then puts it into the storage. Fresh produce with pure o2. Co2
．． It is an object of the present invention to provide a perishable product storage device that can be stored in N2.

Means for Solving the Problems In order to solve the above problems, the fresh produce storage device of the present invention includes a carbon dioxide gas generation device downstream of the storage, a gas adjustment device downstream of the carbon dioxide gas generation device, and a gas adjustment device downstream of the gas adjustment device. The storage units are connected in a ring.

Effect of the present invention With the above-described configuration, the exhaust gas containing impurity gas (ethylene, SOx, No, etc.) from the carbon dioxide gas generator is passed through the gas adjustment device to remove the impurity gas before entering the storage. The fresh food inside is pure N2. It can be stored in a gas containing only CO2 and O2.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a storage such as a prefabricated refrigerator for storing perishables, and a compressor 2. Condenser 3° Evaporator 4. A cooling device 7 consisting of blowers 6, 6 is mounted on the top. ``The blower 6 cools the condenser 3, and the blower 6 forcibly circulates the cold air from the evaporator 4 into the refrigerator. Above storage 1
A carbon dioxide gas generating device 8 for introducing carbon dioxide gas (C02) into the refrigerator is connected to a gas regulating device 9 downstream of this to maintain the atmosphere inside the refrigerator in a constant state. The carbon dioxide generator 8 is constructed between an exhaust pipe 10 through which air in the storage 1 circulates and an inlet pipe 11 through which combustion gas is introduced into the gas regulator 9, and includes a blower 12 (for example, a sirocco fan) and a combustion furnace 14. It consists of The blower 13 sends the air in the storage 1 to the combustion furnace 14 through the exhaust pipe 1o, and causes the combustion exhaust gas from the combustion furnace 14 to flow into the gas adjustment device 9 through the introduction pipe 11. The combustion furnace 1.4 has a casing 16 equipped with a ceramic tube 15 on the inner surface, a cover 18 which also serves as a lid for placing a solid fuel 17 inside the casing 16, and a solid fuel by heating the air from the blower 13. 17 and an ignition heater 19 for combusting the fuel. The solid fuel 17 is a high-purity carbon material such as charcoal, and upon combustion, generates Co2 as exhaust gas. That is C+0
Due to the reaction of 2→Co2, the exhaust gas is N2, CO□, and impurity gases (ethylene, SOx.

No. C) is introduced into the gas regulator 9. As the solid fuel 17 burns, the core temperature rises to about 90 C), and naturally the exhaust gas also becomes high in temperature, so the inlet pipe 11 is provided with a heat exchanger 20 for cooling. 21 may be the discharge pipe 110
This pulp is used to introduce outside air to continue the combustion of the solid fuel 17 when the concentration of solid fuel 17 is extremely low.

On the other hand, the gas regulating device 9 includes two adsorbers 22 and 23 made of activated carbon equipped with heaters 38 and 39 on their outer peripheries, and an exhaust pipe 26 and 23 that alternately circulate exhaust gas into the storage. Blower 27
．． It is composed of pulps 28 to 35. Adsorber 22.
23 is filled with activated carbon 36,37.

The operation of the fresh food storage apparatus constructed as described above will be explained with reference to FIGS. 1 and 2.

Cooled to an arbitrary temperature by the cooling device 7 (for example, AT=2
℃) When fruits and vegetables are stored in the storage 1, the atmosphere inside the storage is an outside air atmosphere (N2-79%, 02 = 21%), which is at point A in Figure 2. Here, CA atmosphere (for example, N
2 = 90%, 02 = 5%, Co2 = 6%) The carbon dioxide gas generator 8 is activated in order to set it to 0 point in Fig. 2.

Then, the air inside the refrigerator is introduced into the inlet pipe 10. Pulp 12. The air is introduced into the combustion furnace 14 via the blower 13 and subjected to combustion. Exhaust gas from combustion of solid fuel 17, that is, N2 and C
O2 gas is introduced into the refrigerator through the gas regulator 9, and Q2 gradually decreases and Co2 increases, and the atmosphere inside the refrigerator becomes (N2
-79%, o2 = 1e%, CO3 -5%) When reaching point B in Figure 2, CA atmosphere (N2m'90% + 02 = s%
+C02=s%) The waste adjustment device 8 operates to control KJII. The gas adjustment device 8 includes an exhaust gas introduction pipe 11. Blower13. Adsorber 22.23 via pulp 28.29
Introducing CO2 into one of the
is adsorbed and returns to the inside of the refrigerator through the discharge pipe 26. However, the two adsorbers 22,23 filled with activated carbon 36,37
If a certain amount of CO2 is adsorbed, the adsorption capacity deteriorates, so one side is adsorbed and the other side is desorbed. For example, when the absorber 22 is performing an adsorption action and the adsorber 23 is performing a desorption action, the pulps 28, 34, 31, and 33 are open, and the pulp 2
9.35 and 30.32 are closed, and the exhaust gas from the carbon dioxide gas generator 8 containing excess CO2 is passed through the activated carbon 36 in the adsorber 22 by the blower 13 and returned to the inside of the refrigerator.
The activated carbon 37 in the adsorber 23, which has a poor adsorption capacity, is heated by passing outside air using the blower 27 and by energizing the heater 39 provided on the outer periphery, which alternately performs a cycle in which Co2 is desorbed while being heated. Control excess CO2 in the warehouse to 6%.

Here, the exhaust gas emitted from the carbon dioxide gas generator 8 is passed through activated carbon in the gas regulating device, and the exhaust gas contains impurity gases (ethylene, SOx, etc.) that are harmful to fresh food.

After removing No., C), it enters the chamber 1, so pure N
2,02, perishables can be stored in a gas containing only CO2.

Effects of the Invention As described above, the present invention burns carbon-containing fuel so that the exhaust gas does not contain moisture. Since the storage is connected in a ring downstream of the gas adjustment device, the exhaust gas containing impurity gas (ethylene, SO, NO, etc.) from the carbon dioxide generator is passed through the gas adjustment device to remove the impurity gas. I'll put it in storage, so
Perishables in storage are kept in pure N2. It can be stored in a gas containing only CO2 and O2.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a fresh food storage device that is an embodiment of the present invention, Fig. 2 is a diagram of the air atmosphere and operation of the device, and Fig. 3 is a diagram of the device operation.
The figure is a block diagram of a conventional fresh food storage device. 1...Storage, 7...Cooling device, 8.
... Carbon dioxide gas generator, 14 ... Combustion furnace, 13 ... Air blower, 9 ... Gas adjustment device.

Claims (1)

[Claims] A storage for storing perishables, a cooling device for cooling the inside of this storage, and a combustion furnace for burning carbon-containing fuel to introduce carbon dioxide gas into the storage, by supplying air from the storage for combustion. A carbon dioxide gas generation device comprising a blower device for circulating air; and a gas adjustment device for adjusting the atmosphere in the storage to a predetermined value; A fresh produce storage device comprising: a gas regulating device; and a storage chamber connected downstream of the gas regulating device in a ring.