JPS62166814A - Vegetables and fruits 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 storage device that suppresses respiration and the activities of microorganisms and enzymes by adjusting the air composition of the atmosphere in which fruits and vegetables are placed.

Conventional technology Conventional storage devices are, for example, Kaoru Kato's ``New resource method OA''.
“About Storage Systems” Air Conditioning and Refrigeration 1971-7
As shown on page 191, the structure was as shown in Figure 3.

That is, fuel supplied from a cylinder or the like is mixed with air 3 supplied from a refrigerator 2 by a circulation blower 1, and CO
2 is combusted in the generator 4 to generate CO22. Since the CO2 generated by the cO2 generator 4 is supplied to the refrigerator 2, the Ozt' inside the refrigerator 2 decreases and CO22 increases through combustion while circulating the air inside the refrigerator 2.

When the CO2 concentration reaches the set value, the scrubber 5 is operated to adsorb excess CO21. When the 02 concentration reaches the set value as indicated by the arrow, the CO2 generator 4 is stopped and the 02 replenishment blower 6 is operated to keep the air composition of the atmosphere in which the fruits and vegetables are kept constant, and the fruits and vegetables are stored. 0
Problems to be Solved by the Invention However, with this type of structure, when petroleum-based gas fuel is used as fuel, the exhaust gas contains a large amount of water vapor, so it takes a very long time to condense this water vapor. The problem was that a large capacitor was required.

Further, if a solid fuel with high carbon purity is used as the fuel, the problem of water vapor generation can be avoided. However, as the oxygen concentration inside the refrigerator 2 continues to fall, the amount of oxygen that can be used for combustion decreases, so the consumption of solid fuel decreases.
A new problem has arisen in that it takes a long time to bring the air composition inside the refrigerator 2 to match the set value due to the decrease in the amount of CO2 generated.

Therefore, the present invention provides a fruit and vegetable storage device that has a simple configuration and can bring the air composition in the refrigerator 2 into conformity with a set value in a short time.

Means for Solving the Problems In order to solve the above problems, the present invention provides that during oxygen-deficient combustion,
This increases the amount of air circulating inside the refrigerator as the oxygen concentration inside the refrigerator decreases.

action The effect of this technical means is like an arrow.

In order to use the oxygen in the refrigerator for combustion, the 02 concentration decreases over time when the device is fully operated.
This reduces the amount of oxygen that comes into contact with the solid fuel, reducing fuel consumption. At this time, if the amount of air circulating inside the refrigerator is increased in accordance with the rate of decrease in the amount of oxygen, that is, the rate of decrease in oxygen concentration, the amount of oxygen that comes into contact with the solid fuel will remain constant regardless of the oxygen deficiency state inside the refrigerator. It becomes quantity. As a result, it is possible to prevent a decrease in fuel consumption during oxygen-deficient combustion, and it is possible to shorten the time required to reach a set air composition.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, a fire grate 9 is provided to partition a combustion furnace 8 of a CO2 generator 7, and a solid fuel 10 with high carbon purity is supplied thereto. Also, below the grate 9 is an electric heater 1.
1 is provided. At the time of startup, the electric heater 11 is energized, and when the solid fuel 1o is heated to a temperature sufficient for combustion, the circulation blower 12 is operated to supply combustion air to the combustion furnace 8. Since the solid fuel 10 is already sufficiently heated, combustion begins as soon as air comes into contact with the solid fuel 1o. The amount of combustion at this time is determined by the amount of oxygen supplied to the solid fuel 1o. The combustion air is upstream of the combustion furnace 8,
It is branched into two parts, primary air and secondary air, and the primary air is directly supplied to the solid fuel 10 for first combustion, and the secondary air is supplied downstream of the solid fuel 10, and the second air is used for combustion. It mixes with unburned components and performs two-arrow combustion, producing a large amount of CO2.

High-temperature exhaust gas containing a large amount of CO21 generated by the CO2 generator 7 is purified by a purification catalyst 13, cooled by a cooler 14, and supplied to a refrigerator 15.

Then, the air whose oxygen concentration has decreased due to this is supplied to the combustion furnace 8 again by the circulation blower 12. This cycle continues until the CO2 concentration within the refrigerator 15 reaches the set value.

When the CO2 concentration in the refrigerator 15 reaches the set value, the scrubber 16 is operated to adsorb excess CO21 exceeding the set value and adjust the CO2 concentration in the refrigerator 16 to the set value.

When the 02 concentration in the refrigerator 16 reaches the set value, the CO2 generator 7 is stopped. After that, the 02 that was consumed by the stored fruits and vegetables to breathe will be transferred to the 02 supply blower 17.
As a result, oxygen from the atmosphere is supplied to the refrigerator 16, and CO2 generated by the breathing of fruits and vegetables is adsorbed by the scrubber 16, thereby maintaining the air composition in the refrigerator 15 at a set value.

The specific operational relationship of the embodiment of the present invention having such a configuration will be described below. When oxygen comes into contact with the surface of the solid fuel, the reaction C+10z→CO occurs on the surface of the solid fuel, followed by the reaction CO+÷02→ near the surface of the solid fuel.
A gas phase reaction called CO2 occurs. Therefore, the combustion of solid fuel largely depends on the surface area and oxygen concentration of the solid fuel. For this reason, the relationship between the oxygen concentration and the fuel consumption when the amount of supplied air is constant is as shown in FIG. 2 (&), where the fuel consumption tends to decrease as the oxygen concentration decreases. on the other hand,
When air inside the refrigerator 15 is used as combustion air,
As the combustion time elapses, the oxygen concentration of the air inside the refrigerator 15 decreases. As a result, fuel consumption decreases over time, and the amount of CO2 generated also decreases. Figure 2 (a) shows the relationship between oxygen concentration and fuel consumption when the amount of supplied air is constant. In other words, it shows the relationship between the absolute amount of oxygen and fuel consumption. Therefore, by increasing the absolute amount of oxygen, the fuel consumption can be made constant regardless of the oxygen concentration as shown in FIG. 2(b). Therefore, the oxygen concentration inside the refrigerator 15 is detected by the sensor 17, and the amount of air blown by the circulation blower 12 is increased in accordance with the decrease in the oxygen concentration, thereby increasing the amount of air circulating inside the refrigerator 16. With this method, even if the oxygen concentration decreases, the absolute amount of oxygen supplied to the combustion furnace 8 does not decrease. Therefore, the consumption of solid fuel during oxygen-deficient combustion can be prevented, and the time required to reach a set air composition can be significantly shortened.

Effects of the Invention The present invention prevents a decrease in fuel consumption by increasing the amount of air circulating inside the refrigerator as the oxygen concentration in the refrigerator decreases, and shortens the time to reach the set fc air composition. can be achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a fruit and vegetable storage device according to an embodiment of the present invention;
Figure 2 shows the relationship between solid fuel oxygen concentration and fuel consumption.
Yamaguchi, FIG. 3 is a schematic diagram of a conventional fruit and vegetable storage device. 7... CO2 generator, 12... Circulating blower, 13... Purification catalyst, 14...
...Cooler, 15...Refrigerator, 1e...
・Scrubber.

Claims (1)

[Claims] A refrigerator, a CO_2 generator that supplies CO_2 generated by burning a solid fuel with high carbon purity to the refrigerator, and a blower that circulates air in the refrigerator as combustion air and supplies it to the CO_2 generator. has
A fruit and vegetable storage device configured to use the blowing means to increase the amount of air circulating within the refrigerator in accordance with a decrease in oxygen concentration within the refrigerator during oxygen-deficient combustion.