JPH048224A - Fresh article storage device - Google Patents

Abstract

PURPOSE:To contrive the reduction in the size of the device and the reduction in the price of the device by combining a storage chamber, carbonic acid gas- generating device, an adsorbing material, a passageway-switching member and a carbonic acid-adsorbing device so as to achieve a specific action. CONSTITUTION:A gas flowing in an adsorbing material 135 forms a layer flow because spaces 172' play the role of pressure chambers, thereby not causing the deterioration of the adsorption ability thereof. Even when the amount of circulated air is increased and the flow of the air is changed from the homogeneous layer flow state into a concentrated flow state, the adsorption ability of the adsorbing material is not deteriorated because the communication openings 168-170, 169 and 171 are disposed at positions giving the longest gas-passing distances of the adsorbing material, and the passing distance of the circulated gas can be shortened. The decrease in the amount of the circulated air due to the loss of pressure is thereby reduced and the required amount of the circulated air can be secured with a small air blower. Since pipings to be connected can be reduced and the container for receiving the adsorbing material can be simplified, the size of the device can be reduced and an inexpensive storage chamber can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application 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 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, a longer term storage method involves changing the air composition within the storage room. In other words, by reducing the concentration of oxygen 02 and increasing the concentration of carbon dioxide gas CO2 in the storage, the respiration effect of fresh food is suppressed, and the deterioration caused by microorganisms.

It is known that chemical reactions such as decomposition and oxidation can also be prevented.

Referring to the drawings below, this conventional Japanese Patent Application Laid-open No. 63-
Publication No. 201407 will be explained with reference to FIG. 6.

In the figure, 1 is a storage such as a prefaf refrigerator for storing perishables, and a compressor 2. Condenser 3° Evaporator 4. A cooling device A consisting of blowers 6, 6 is mounted on the upper part.

Connected to the storage 1 are a carbon dioxide gas generator 8 for filling the interior with carbon dioxide gas C○2, and a carbon dioxide adsorption device 9 for adsorbing and removing excess carbon dioxide gas CO2 in the smoldering gas. ing. The carbon dioxide gas generator 811'i is constructed between an introduction pipe 10 that introduces air in the storage 1 and a connecting pipe 11 that leads the combustion gas generated here to the carbon dioxide adsorption device 9, and is connected to the combustion furnace 12. Catalyst tube 13. It is composed of a preheater 14 and a cooler 16. 16 is a blower, which is installed in the connecting pipe 11 between the cooler 16 and the carbon dioxide adsorption device 9;
The air inside the storage 1 is transferred through the introduction pipe 10 to the carbon dioxide gas generator 8.
and fed into the carbon dioxide adsorption device 9 through the connecting pipe 11. The combustion furnace 12 includes an inner casing 18 having a heat insulating pipe 17 on its inner surface, and an outer casing having a heat insulating pipe 20 on its inner surface forming an air passage 19 between the inner casing 18 and the inner casing 18 for supplying secondary combustion air. 21 and solid fuel 2 in the insulated pipe 17.
2, and an ignition heater 24 for heating the combustion air to combust the solid fuel 22. The inner casing 18 and the outer casing 21 partition the air passage 19 into upper and lower sections using a partition plate 25. Reference numeral 26 denotes a branch part for the combustion air to be circulated to the combustion furnace 12. This branch part 26 and the lower part of the combustion furnace 12 are connected by a connecting pipe 27, and the branch part 26 and the air passage 19 of the combustion furnace 12 are connected to each other by a connecting pipe 27. It is connected to the upper part of the body by a connecting pipe 28. solid fuel 22
is C+02+N2- by combustion with high purity carbon.
→ Due to the reaction of Co2 + N2, the combustion gas is carbon dioxide gas C02
and becomes nitrogen N2.

Reference numeral 29 is a connecting pipe that guides the combustion gas from the combustion furnace 12 to the catalyst tube 13, and is provided with a heat insulating pipe 30 on the inner surface.

The catalyst tube 13 is provided with a shift filter 33 in the upper part and two catalysts 34 in the lower part thereof in a casing 32 equipped with a heat insulating pipe 31. 36 is a heater for heating the catalyst, and is installed between the two catalysts 34. 36 is a connecting pipe for guiding the combustion gas from the catalyst pipe 13 to the pre-#M14, and is provided with a heat insulating pipe 37 on the inner surface. The pre-purifier 14 includes a heat exchanger 40 inside a casing 39 that includes an insulated pipe 38 . The heat exchanger 40 is
It is composed of a plurality of pipes 41 and a plurality of fins 42 arranged so that air flows in a meandering manner on the outside of the pipe.

Combustion gas that has circulated through the catalyst tube 13 passes through the pipe of this heat exchange Rfr 40, passes through the upper inlet 43 on the outside of the pipe, and the air in the storage 1 introduced through the introduction pipe 10 is transferred to the lower outlet. The outside of the pipe is circulated in a meandering manner up to the section 44, and connected to the branch section 26 through a connecting pipe 46 connected to the outlet section 44. Reference numeral 46 is a connecting pipe that guides the combustion gas from the preheater 14 to the cooler 15. 47 is a cooling fan for the cooler.

On the other hand, the carbon dioxide adsorption device 9 is for adsorbing excess carbon dioxide Co2 in the combustion gas and discharging it outside the storage 1. Introductory pipes 50, 51, . Discharge pipe 52,5
3. It is composed of switching valves 54 and 66. Slight increaser 4
8.49 is filled with adsorbent material 66.6,
When carbon dioxide gas Co2 is adsorbed and the adsorption capacity decreases, the blower 6 switches the outside air to the switching valve 69. Discharge pipe 52.5
Air is blown to the adsorber 48 or 49 through the inlet pipe 60 or 61 connected to the inlet pipe 60 or 61 to desorb carbon dioxide gas, and the discharge pipe 62, 63.
It is configured to be exhausted to the atmosphere from an exhaust pipe 65 through a switching valve 64.

For example, when the adsorber 48 is acting as an adsorbent and the adsorber 49 is acting as a desorber, the switching valves 54 and 55 switch the combustion gas to the inlet pipe 50. Adsorber 48. The switching valves 69, 64 are open in the direction of flow through the exhaust pipe 52, and the switching valves 69, 64 allow outside air to be transferred by the blower 58 to the inlet pipe 61. Adsorber 49. It passes through the exhaust pipe 63, opens in the flow direction, and is exhausted to the atmosphere through the exhaust pipe 65. The exhaust pipe 66 connects the switching valve 66 and the storage. 6 is a switching valve installed in the inlet pipe 1o with one side open to the atmosphere. 68 is a switching valve, which is provided between the cooler 16 and the blower 16;
And the connecting pipe 69 connects the introduction pipe 10 and the switching valve 68.
is connected. Reference numeral 7° denotes a controller that controls the air volume of the blower 16, and the air volume is determined in inverse proportion to the oxygen concentration in the storage 1 by a signal from a gas monitor 71 that detects the gas concentration in the storage 1. 72 is a chamber;
A container provided in the inlet pipe 10 between the storage 1 and the switching valve 67 is connected to a sunfling tube 73 of a gas monitor 71.

Problems to be Solved by the Invention However, in the above configuration, the piping configuration on the upstream and downstream sides of the adsorber becomes complicated, and the flow path switching section and the adsorbent are also connected by piping.

For this reason, the amount of circulating air decreases due to pressure loss in this part, and in order to secure the necessary amount of circulating air, a large blower is required.
The problem was that the device became larger and the cost increased.

In view of the above problems, the present invention provides a compact and inexpensive fresh food storage device.

Means for Solving the Problems In order to solve the above problems, the fresh produce storage device of the present invention includes a plurality of adsorbents separated by internal partition plates that adsorb and remove excess carbon dioxide, and a・A damper is provided on the downstream side, and a flow path switching section that switches the gas flow direction and the flow path is integrated.

A carbon dioxide adsorption device is provided, in which a gap is provided between the adsorbent and the flow path switching section, and a communication hole for gas from the flow path switching section is provided at a position where the passage distance of the adsorbent is the longest. It is something that

Function: With the above-described configuration, the gas flowing through the adsorbent becomes a laminar flow, and the adsorption capacity does not deteriorate, and the distance through which the circulating gas passes can be shortened, so that the decrease in the amount of circulating air due to pressure loss is small. , the required amount of circulating air can be secured with a small blower, and even if the amount of circulating air increases depending on the gas concentration in the storage chamber and the flow changes from a uniform laminar flow state to a concentrated state, the passage of the adsorbent material will be maintained. Since the gas communication hole from the flow path switching part is provided at the position where the distance is the longest, the adsorption capacity does not deteriorate, the number of connecting pipes can be reduced, and the container for storing the adsorbent 135 is simplified. Therefore, it is possible to provide a fresh food storage device that is compact and inexpensive.

EXAMPLE Hereinafter, a fresh food storage apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a fresh produce storage device in an embodiment of the present invention.

In the description, parts that are the same as the conventional one will be given the same numbers, and parts that are different from the conventional one will be given numbers starting from 101.

In FIG. 1, 1 is a storage such as a pre-fabricated refrigerator for storing perishables, and a compressor 2. Condenser 3, base unit 4.
A cooling device A consisting of blowers 5 and 6 is mounted on the top. The storage 1 includes a carbon dioxide gas generating device 101 for filling the interior with carbon dioxide gas C○2, and a carbon dioxide gas adsorption device 102 for adsorbing and removing excess carbon dioxide gas C○2 in the burning gas. It is connected to the. The carbon dioxide gas generator 101 is
It is arranged between an introduction pipe 103 that introduces air in the storage 1 and a connecting pipe 104 that leads the combustion gas generated here to the carbon dioxide adsorption device 102, and is connected to the combustion furnace 105 and the combustion furnace 10.
5. A preheater 106 which exchanges heat with combustion gas to preheat the air used for combustion, which is provided in contact with the upper part, and a combustion gas cooler 107.
It consists of

A blower 108 is installed in the connecting pipe 104 between the cooler 107 and the carbon dioxide adsorption device 102, and guides the air in the storage 1 from the introduction pipe 103 to the combustion furnace 106.
After cooling the combustion gas generated in step 05 with cooler 107,
It is led to the carbon dioxide adsorption device 102 through a connecting pipe 104. The combustion furnace 105 includes an inner casing 110 having a heat insulating pipe 109 on the inner surface, and a heat insulating plate 11 on the inner surface forming an air passage 111 between the inner casing 110 and the inner casing 110 for supplying combustion air.
It consists of an outer casing 113 with 2. 1
14 is solid fuel, which is an insulated pipe 109 of the inner casing 110;
filled inside. 116 is a grate, solid combustion 11
4 is listed.

Reference numeral 116 denotes an ignition heater that heats combustion air to combust the solid fuel 114. The solid fuel 114 is highly pure carbon and is combustible.C+02+N2→CO2+N
In reaction 2, the combustion gas becomes carbon dioxide CQ2 and nitrogen N2.

117 is a partition plate that directs combustion air to the inner casing 10.
A heat insulating plate 112 provided on the inner surface of the outer casing 113 and the inner casing 110 is provided to form the air passage 111 for guiding the air into the air. The air passage 111 has an upper end open to a combustion air tube outer outlet 119 provided at a contact surface 118 between the combustion furnace 106 and the preheater 106, and a lower end opened into the combustion furnace 105 communicating with the inner casing 11o. are doing. 12o is a secondary combustion air hole, which opens in the upper part of the partition plate 117 through which the combustion gas after reacting with the solid fuel 114 passes. The preheater 106 is composed of a pipe 122 through which combustion gas having a higher temperature than the inside of the pipe 121 flows, and a fin 123 configured so that combustion air flows meandering around the outside of the pipe 122. They are placed in contact with each other at the contact surface 118. 124 and 125 are covers that cover the preheater 106. Further, a heat insulating plate 126 is provided on the inner surface of the cover 124. The cooler 107 is connected to the pipe 1 of the preheater 106.
22 and is provided with a cooling fan 127 for cooling the pipe 122.

128 is a catalyst, which functions to oxidize carbon monoxide generated by incomplete combustion in combustion gas and replace it with carbon dioxide. The catalyst 128 has a through-cylindrical portion 130 provided in a part of a case 129 that partitions a combustion gas flow path.
and is provided above the inner casing 110. 131 is a diaphragm plate, and the inner casing 11o
The combustion gas is allowed to pass through a throttle hole 132 provided at the center of the throttle plate 131 with a flange at the peripheral edge on the side of the internal casing 11o. 133 is solid fuel 11
It is a filter for removing ash contained in 4,
It is provided between the catalyst 128 and the throttle plate 131. 1
34 is a heater for heating the catalyst, and is provided upstream of the catalyst 128.

On the other hand, the acid gas adsorption device 102 is intended to adsorb excess carbon dioxide gas C2 in the combustion gas and discharge it to the outside of the storage 1. The carbon dioxide adsorption device 102 includes an adsorbent 135
Flow path switching section 13 provided upstream and downstream of this adsorbent 136
It is composed of 6,137 υ, and the whole is covered with a υ, 138 outer box. Reference numerals 139 to 151 are internal partition plates, which partition each part so that there is no leakage inside. 162 to 159 are dampers for flow path switching, dampers 152 to 1 respectively.
Ventilation holes 160 to 167 provided in the internal partition plate facing 59
It is designed to open and close. Reference numerals 168 to 171 are communication holes that communicate between the flow path switching sections 136 and 137 and a gap 172' that accommodates the filter 172 and is provided between the adsorbent 135 (see FIG. 3 for details). The communication holes 168 and 170 are each provided at a position where the passage distance of the adsorbent 135 is the longest.

The same applies to communication holes 169 and 171. 173 to 176 are ventilation holes provided in the internal partition plates 142, 143, 147, and 148. 176', 176'' are flow path switching parts 136,1
37 and closes off the outer box 138. 17
A discharge pipe 7 connects the flow path switching section 137 on the downstream side of the carbon dioxide adsorption device 102 and the storage 1. Reference numeral 178 is a blower for removal and removal, and is provided to discharge air to the flow path switching section 137. 179 is an exhaust pipe, and the flow path switching section 136
is installed to perform exhaust during regeneration.

180 is a flow path switching section, which is provided between the carbon dioxide gas generator 101 and the carbon dioxide adsorption device 102. Outer box 18
1 is divided by internal partition plates 182 to 184 so that each part is not omitted. Dampers 185 to 188 are for switching flow paths, and are provided to open and close ventilation holes 189 to 192 provided in the outer box 181 and inner partition plates 182, 183, and 184 facing each damper 186 to 188. 193
is a gas monitor, which is connected by a sampling tube 194 so as to sample the gas inside the introduction pipe 103. A controller 196 controls the air volume of the blower 10B, and the air volume is determined by a signal from the gas monitor 193.

Regarding the fresh food storage device configured as described above, the first
The operation will be explained using FIG.

The atmosphere inside storage 1 was initially N2 = 7 s%, 02 =
21%, and when the carbon dioxide generator 101 is operated, the air inside the refrigerator is passed through the introduction pipe 103 by the blower 108 to the ventilation hole 190. It is introduced into the outside of the preheater 106 through the introduction pipe 103 and heated to a high temperature through heat exchange, and is then introduced into the combustion furnace 105 through the air passage 111 and heated by the ignition heater 116. The solid fuel 114 is then used for combustion.

Due to the reaction of C+020N2→C○2+N2, the combustion gas becomes carbon dioxide gas CO2 and nitrogen N2, and passes through the throttle hole 132. It passes through the filter 133, completely oxidizes and purifies the carbon monoxide generated by incomplete combustion in the catalyst 128, passes through the inside of the tube of the preheater 106, cools it in the υ cooler 107, and then flows into the connecting pipe 104. Ventilation hole 192 of path switching section 180. It passes through the blower 10B, and further passes through the connecting pipe 104, ventilation holes 173, 161 . It passes through the communication hole 168 and enters the gap 172'. Gap 172'
is a pressure chamber, and the gas enters the adsorbent 135 on the left side in a laminar flow state. Here, carbon dioxide gas CO2 is absorbed by the adsorbent 136
Only the nitrogen N2 adsorbed by the gas passes through the communication hole 170 and the ventilation holes 165, 175, and circulates to the storage 1 through the discharge pipe 177. After a certain period of time has passed, the dampers 162 to 159 are switched so that the adsorbent 135 through which the combustion gas circulates is switched from the left side to the right side, and the ventilation holes 173 and 16 are switched from the left side to the right side.
0. It passes through the communication hole 169 and enters the gap 172'. The gap 172' is a pressure chamber, and the gas enters the adsorbent 135 on the right side in a laminar flow state. Here again, carbon dioxide gas Co2 is
Only the nitrogen N2 adsorbed by the adsorbent 136 on the right side passes through the communication hole 1711 and the ventilation holes 164 and 175 to the discharge pipe 1.
At the end of 7, it is circulated to storage 1.

After a certain period of time has elapsed again, the adsorbent 135 switches from the right side to the left side, and the combustion gas alternately circulates.

During this time, the adsorbent 135 on the left side reaches the limit of its adsorption capacity for carbon dioxide Co2, and the carbon dioxide C○2 in the combustion gas can no longer be adsorbed and is exhausted into the storage 1 through the discharge pipe 177. The concentration of carbon dioxide gas C○2 in 1 begins to increase gradually. This is the state of the storage 1, which has a size of 75 kg, and has been in operation for about 2 hours since the start of operation.

During this time, the oxygen O2 concentration in the storage 1 continues to decrease from the initial 21%. Let the gas concentration in storage 1 be oxygen02=
6%, carbon dioxide gas C03 = 6%, and nitrogen N2 = 90%, the gas monitor 193 detects that the carbon dioxide in the inlet pipe 103 has increased and reached 6%. When detected by performing gas sampling, the blower 178 for desorption of the carbon dioxide adsorption device 102 is operated, and regeneration of the adsorbent 135 is started. For example, when the adsorbent 135 on the right side is adsorbing carbon dioxide Co2 as combustion gas circulates, the adsorbent 136 on the left side is adsorbing the air blower 178
As a result, outside air passes through the ventilation holes 176 and 167° communication hole 170 and enters the gap 172'. The gap 172' serves as a pressure chamber, and carbon dioxide C2 is desorbed and regenerated by being blown to the adsorbent 136 on the left side in a laminar flow state. Since this is performed alternately at regular intervals, the concentration of carbon dioxide C○2 in the storage 1 is maintained at a predetermined 5%. On the other hand, the oxygen 02 concentration continues to decrease because it is being used for combustion during that time.

Here, since the amount of circulating air is determined in inverse proportion to the oxygen concentration in the storage 1, the amount of circulating air at this time increases significantly compared to the initial amount of circulating air. Then, the gas flowing through the adsorbent 135 changes from the initial uniform laminar flow state to the upper part of the adsorbent 136.
Communication hole 168 provided in downstream flow path switching section 136° 137
, 170 or 169.171.

After 1Q time, the predetermined 6% is reached, the gas monitor 19 detects this and stops the carbon dioxide gas generator 101 and the carbon dioxide adsorption device 1o2.

Now, the inside of storage 1 has the predetermined gas concentration oxygen 02 = 6%,
Carbon dioxide gas C○2 = 5%, nitrogen N2 = 90%, and storage begins. At the same time as detecting that the oxygen 02 concentration has reached the predetermined 5%, the damper 186 of the flow path switching section 180,
187 and 188 are the introduction pipe 103 and the ventilation hole 191. Blower 108. The connection pipe 104 is switched to communicate with the connecting pipe 104. Thereafter, the blower 108 is operated at regular intervals, and the introduction pipe 103 is
By detecting the gas in the storage compartment 1 with the gas monitor 193, when the carbon dioxide gas CQ2 generated by the respiration of the fresh food stored in the storage compartment 1 exceeds a predetermined 5%, the carbon dioxide adsorption device is activated to reduce the concentration to a predetermined concentration. Carbon dioxide gas CO until
Adsorb 2. To explain this operation, gas monitor 1
93 exceeds a predetermined concentration, the blower 1
08 is operated, gas in the storage 1 is passed through the inlet pipe 1o39 ventilation hole 191° blower 108. Connecting pipe 1049 ventilation hole 17
3° 161, passing through the communication hole 168 and passing through the gap i 172'
to go into. The gap 172' becomes a pressure chamber and the excess carbon dioxide C is introduced into the adsorbent 136 on the left side in a laminar flow state.
O2 is adsorbed by the adsorbent 136, and further, the communication hole 170
1 ventilation hole 165, 175. It passes through the discharge pipe 177 and circulates to the storage. On the other hand, the absorbent material 135 on the cloth side is
8 allows outside air to flow through ventilation holes 176, 166, and communication holes 171.
and enters the first gap 172'. The gap 172' serves as a pressure chamber, and the carbon dioxide gas C02 is desorbed by being blown to the adsorbent 136 on the right side in a laminar flow state. Since this is applied alternately at regular intervals, the concentration of carbon dioxide α in the storage returns to the predetermined concentration.

In addition, oxygen O2 becomes insufficient due to the respiration of fresh food.
When the amount falls below a predetermined value of 6%, outside air is introduced into the storage 1 by the blower 178 and replenished.

The introduction route is the blower 1781 ventilation hole 176.166°1
64.175. It passes through the discharge pipe 177 and is introduced into the storage 1. At the same time, the gas in the storage 1 is discharged from the exhaust pipe 179. The exhaust route is 191° ventilation hole and 1 m long! 10B
? Connecting pipe 1o49 ventilation hole 173, 161° 163.17
4. It is exhausted through an exhaust pipe 179.

Next, the operation of ventilating the gas in the storage 1 in order to finish storage and take out the perishables in the storage 1 will be explained.

Ventilation switch (not shown) on control panel (not shown)
The blower 108 is operated by turning on the gas in the storage 1 through the inlet pipe 1o3° ventilation hole 191. Blower 1o7. Connecting pipe 1o49 ventilation hole 173, 161, 163
, 174. It passes through the exhaust pipe 179 and is released into the atmosphere.

At the same time, outside air is introduced into the storage 1 by the blower 178.

Its path is the blower 1789 ventilation hole 176, 166°1
64.175. This is a discharge pipe 177. When the gas monitor 193 detects that the gas in the storage 1 has become equal to the outside air, the blowers 108 and 178 are stopped, and the damper 162 is turned off.
~159, 185~188 are ventilation holes 160~167.
189 to 192 are switched to close.

As described above, according to this embodiment, the adsorbent material 1 has two compartments separated by an internal partition plate 139 that adsorbs and removes excess carbon dioxide gas.
35 and dampers 162 to 169 on the upper and downstream sides of the adsorbent 136 in these two sections, and flow path switching parts 136 and 137 that switch the gas flow direction and flow path are integrally configured,
In addition, a gap 172' is provided between the adsorbent 135 and the flow path switching sections 136 and 137, and the flow path switching section 136
, 137 gas communication ports 168 and 170 and 16
9 and 171 are installed at the position where the passage distance of the adsorbent 135 is the longest, the gas flowing through the adsorbent 136 becomes a laminar flow due to the gap 172' acting as a pressure chamber, and is adsorbed. The gas communication ports 168 to 1 are located at positions where the passage distance of the adsorbent 136 is the longest even when the amount of circulating air increases and the flow changes from a uniform laminar flow state to a concentrated state without deteriorating the capacity.
70, 169, and 171, the distance through which the circulating gas passes can be shortened without deteriorating the adsorption capacity, reducing the decrease in the amount of circulating air due to pressure loss and achieving the required amount of circulating air with a small blower. , the number of connecting pipes can be reduced, and the container housing the adsorbent 136 can be simplified.

The device can be made more compact, and an inexpensive fresh food storage can be provided.

Effects of the Invention As described above, the present invention consists of a plurality of adsorbents separated by internal partition plates that adsorb and remove excess carbon dioxide gas, and dampers on the upper and downstream sides of the adsorbents, which are arranged in the direction of gas flow. A flow path switching section for switching the flow path is integrally configured, and a gap is provided between the adsorbent and the flow path switching section, and a gas communication port from the flow path switching section is connected to the adsorbent. By providing a carbon dioxide adsorption device installed at the position where the passage distance is the longest, the gas flowing through the adsorbent material becomes a laminar flow as the gap acts as a pressure chamber, and the adsorption capacity is not deteriorated. Even if the amount of air increases and the flow changes from a uniform laminar flow state to a concentrated state, the gas communication port is located at the position where the adsorbent passes the longest distance, so the adsorption capacity can be circulated without deterioration. Since the distance through which the gas is passed can be shortened, the amount of circulating air is less reduced due to pressure loss, and the necessary amount of circulating air can be secured with a small blower.In addition, the number of connecting pipes can be reduced, and the container that houses the adsorbent can be simplified. As a result, the device can be made more compact, and an inexpensive raw material storage can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a fresh produce storage device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a carbon dioxide adsorption device of the present invention, and FIG. 3 is a cross-sectional view of a carbon dioxide adsorption device of the present invention. figure,
FIG. 4 is a graph showing changes in internal gas components due to the device, and FIG. 6 is a schematic cross-sectional view of a conventional fresh food storage device. 1... Storage, 1o1... Carbon dioxide gas generator, 102... Carbon dioxide adsorption device, 135.
...-adsorbent. 136.137...Flow path switching section, 139...
...Inner partition plate, 152-159...Damper, 168°170.169,171...Communication port %172'...Gap. Name of agent: Patent attorney Shigetaka Awano and 1 other person N Chimo

Claims (1)

[Claims] A storage for storing perishables, a carbon dioxide gas generator that reduces oxygen and increases carbon dioxide in this storage, multiple adsorbents separated by internal partition plates that adsorb and remove excess carbon dioxide, and an adsorption system. Constructed with dampers on the upper and downstream sides of the material,
A flow path switching section that switches the gas flow direction and the flow path is integrally configured, and a gap is provided between the adsorbent and the flow path switching section, and a gas communication port from the flow path switching section is provided. A fresh produce storage device comprising a carbon dioxide adsorption device provided at a position where the adsorbent travels the longest distance.