JPS62146527A - Fresh article storage apparatus - 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 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.

BACKGROUND OF THE INVENTION Refrigerated storage is a common means of storing perishables, but in addition to this, storage that changes the air composition within the storage room is a longer term storage method. In other words, the concentration of oxygen (O2) in the storage chamber is reduced, and carbon dioxide (Co2)9
It is known that by increasing the temperature, it is possible to suppress the respiration of fresh foods and also to prevent chemical reactions such as deterioration, decomposition, and oxidation caused by microorganisms. As a method of saving money, for example, as shown in Japanese Patent Publication No. 48-24218 or Japanese Patent Publication No. 60-12004,
By burning the air inside the storage with a combustion device and introducing the combustion exhaust gas into the storage, there are some methods that reduce the oxygen concentration and increase the carbon dioxide concentration inside the storage in a shorter time than when burning outside air. .

On the other hand, what is important in such a perishables storage device is: (1) In order to preserve the perishables in the storage for a long time, the atmosphere inside the storage can be quickly adjusted to a predetermined 0.2%. The concentration should be C○2. Furthermore, (2) since Co2 is generated through combustion, the combustion reaction continues stably and combustion is not interrupted. In addition, (3) since combustion exhaust gas is introduced into the warehouse, it must be ensured that the generation of impurities does not have an adverse effect on fresh produce.

is required.

Problems to be Solved by the Invention However, in the above-mentioned conventional example using air combustion in the refrigerator, although it seems that the specified atmosphere is reached quickly, due to the decrease in 02, the combustion reaction becomes insufficient, and as a result, it is delayed or even worse. The generation of impurities due to incomplete combustion becomes unavoidable. Furthermore, it can be easily inferred from the above conventional example that when this 02 decreases, combustion inside the refrigerator is switched to combustion using air outside the refrigerator. cannot be satisfied.

In view of the above-mentioned problems, the present invention provides a fresh produce storage device in which the atmospheric condition within the refrigerator reaches a predetermined condition more quickly, and in addition, combustion can continue stably.

Means for Solving the Problems The fresh produce storage device of the present invention solves the above problems.
Circulation 1 of the blower device that circulates the air inside the storage to the combustion furnace There is an outside air introduction path that introduces outside air into the combustion furnace according to the decrease in oxygen concentration inside the storage, and when outside air is introduced into the upper part of the storage, the upper air inside the storage is discharged. It is equipped with an exhaust pipe.

Function: This allows the atmosphere inside the refrigerator to reach a predetermined value more quickly and allows stable combustion to continue.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

In the figure, 1 is a storage pressure such as a prefabricated refrigerator for storing perishables, and a compressor 2. Condenser 3° Evaporator 4. A cooling device γ consisting of a blower 5.6 is mounted on the top. Connected to the storage 1 are a carbon dioxide gas generator 8 for introducing carbon dioxide (CO2) into the storage, and a scrubber 9 for keeping the atmosphere inside the storage constant. The carbon dioxide generator 8 is constructed between an exhaust pipe 10 through which air in the storage 1 circulates and a pipe 11 that introduces combustion gas into the storage 1, and includes a valve 12 and a blower device (for example, a sirocco fan) 13.
, and a combustion furnace 14. The blower device 13 sends the air in the storage 1 to the combustion furnace 14 through the exhaust pipe 10, and circulates the combustion exhaust gas from the combustion furnace 14 into the storage 1 through the introduction pipe 11.

The combustion furnace 14 has a casing 16 with a ceramic tube 15 on its inner surface, a cover 18 that also serves as a lid for placing the solid fuel 17 inside the casing 16, and a heating device that heats the air from the blower 13 to produce the solid fuel 17. It consists of an ignition heater 19 for combustion. The solid fuel 17 is a high-purity carbon material such as charcoal, and when it is combusted, CO2 is generated as exhaust gas. Due to the reaction C+02→C02, the exhaust gas becomes only N2 and CO2, which are introduced into the storage 1. As the solid fuel 17 burns, the core temperature rises to about 900°C, and naturally the exhaust gas also becomes high temperature, so a cooling heat exchanger 20 is installed in the inlet pipe 11. When the 02 concentration of
This is an outside air introduction path for introducing outside air to continue the combustion of the solid fuel 17, and includes a valve 21' controlled by an oxygen sensor 41, which will be described later.

On the other hand, the scrubber 9 has a carbon dioxide gas generator 8 inside the storage 1.
The atmosphere is N=79% and C02=16%.

After o2=5% or when CO2 is filled to a predetermined value, the predetermined value, for example, N2=90%, C○2=5
%, 02-5%, and pipes 24.25, blowers 26, 27, etc. are used to alternately circulate the air inside the storage 1 to the two adsorbers 22, 23.
Valves 28 to 35 are configured. Adsorber 22.23
The inside is filled with activated carbon 36, 37, which adsorbs CO2, and if the adsorption capacity is poor, a heater provided on the outer periphery, 38
．． In order to attach and detach while heating with 39, the structure 1~ is used.

For example, when the absorber 22 is performing an adsorption function and the vacuum absorber 23 is performing a desorption function, the valves 28, 34, 31, and 33 are open, and the valves 29, 35, 30, and 32 are closed, and the blower 2
6, the air inside the storage 1 containing too much CO2 is passed through the activated carbon 36 and returned to the inside of the storage, while the outside air is passed through the activated carbon 37 by the blower 27 to desorb CO2. During this attachment/detachment, the heater 39 is still energized.

Further, an exhaust pipe 4o is provided on the ceiling of the storage 1 to exhaust the upper air inside the storage, and a pulp 40' is used to connect and block communication between the inside and outside of the storage.

On the other hand, 41 is a sensor that detects the 02 concentration in the warehouse, and when the value of this sensor 41, for example 02a degree, reaches 10 degrees, a controller closes the pulp 12 and opens the pulps 21' and 40'. 42.

The operation of the fresh food storage device configured as described above will be explained with reference to the drawings.

The atmosphere inside storage 1 was initially N2=79%, 02-2
1%, and when the carbon dioxide generator 8 is operated, the air inside the warehouse is sent to the combustion furnace 1 via the pulp 12 and the blower 13.
4 and subjected to combustion.

Exhaust gas from combustion of solid fuel 17, that is, N2 and Co2
gas is introduced into the chamber. As a result, 02 as an air component in the storage 1 decreases, and CO2 increases. However, the concentration of O2 in the circulating air to the combustion furnace 14 decreases, so that the combustion reaction is no longer carried out satisfactorily. Therefore, when the sensor 41 detects that the 02 concentration is below 10 g, the controller 40 operates to close the pulp 12 and open the pulps 21' and 40', and outside air is introduced into the combustion furnace 14 to start combustion. This is carried out stably, the amount of CO2 generated increases, and the internal atmosphere reaches a predetermined value more quickly. At the same time, the air with a high 02 concentration above the exhaust pipe 40 is exhausted from the inside of the refrigerator, so the pressure inside the refrigerator does not increase and the replacement operation continues smoothly. The invention includes an outside air introduction path that introduces outside air into the combustion furnace in response to a decrease in oxygen concentration in the storage in the circulation path of a blower device that circulates air in the storage to the combustion furnace, and an outside air introduction path that introduces outside air into the combustion furnace when outside air is introduced into the upper part of the storage. Since it is equipped with an exhaust stack, it is possible to reach the initial setting value as the a) 2.02 atmosphere inside the refrigerator more quickly, and in addition, even if the 02 concentration inside the refrigerator, which is used for combustion, decreases. Stable combustion is possible because outside air is introduced and air with a high oxygen concentration from the upper layer of the chamber is exhausted.

[Brief explanation of drawings]

The figure is a structural diagram of a fresh food storage device that is an embodiment of the present invention. 1...Storage, 8...Carbon dioxide generator, 13...Blower, 14...Combustion furnace, 21...Outside air introduction Road, 4o...Exhaust pipe.

Claims (1)

[Claims] a storage for storing perishables; a combustion furnace for burning carbon-containing fuel to introduce carbon dioxide gas into the storage;
This combustion furnace is equipped with a carbon dioxide gas generating device comprising a blower for circulating air from the storage to be used for combustion of the fuel, and the carbon dioxide gas generating device is provided in a circulation path between the storage and the blower to generate the carbon dioxide gas in response to a decrease in oxygen concentration in the storage. A fresh produce storage device comprising an outside air introduction path for introducing outside air into a combustion furnace, and an exhaust pipe for exhausting air from the upper part of the storage when the outside air is introduced.