JP6901852B2 - Storage - Google Patents

Description

Embodiments of the present invention relate to storage.

Oxidation by oxygen present in the air is a factor of deterioration of stored items such as foods stored in storages such as refrigerators. Therefore, there is known a storage that can suppress the oxidation of the stored product and maintain the freshness of the stored product by reducing the oxygen in the space where the food is stored.

For example, in Patent Documents 1 to 3 below, by sucking the air in the storage chamber through an oxygen separation membrane (oxygen enrichment membrane), air having a high oxygen concentration is discharged to the outside, and the storage chamber reduces oxygen in the storage chamber. Has been proposed. However, in these storages, since the storage chamber is composed of a closed container and the inside is decompressed, it is necessary to use an airtight and pressure-resistant container. Therefore, the container becomes large and the effective internal volume is reduced, and it tends to be difficult to open and close the lid of the container.

Japanese Unexamined Patent Publication No. 6-18152 Japanese Unexamined Patent Publication No. 6-58 Japanese Unexamined Patent Publication No. 2009-174724

Therefore, it is an object of the present invention to provide a storage capable of storing the stored material in a low oxygen atmosphere without reducing the pressure inside.

A first storage chamber formed inside the cabinet, a second storage chamber formed inside the cabinet and communicating with the first storage chamber, an oxygen separation film provided in the first storage chamber, and the oxygen. An exhaust means for exhausting air in a space communicating with the second storage chamber in the first storage chamber that has passed through the separation membrane to the outside of the cabinet, and a ventilation hole for communicating the first storage chamber and the outside of the cabinet. A compressor, a cooler that generates cold air from the refrigerant supplied from the compressor, a fan that blows the cold air generated by the cooler, and the cold air blown out from the fan are the second storage chamber and the said. and a circulation air path sequentially through the first storage chamber back to the cooler, the air circulation duct is provided with a return duct for returning the air which has flowed through the first storage compartment to the cooler, the vent Is provided in the return duct, and the air in the first storage chamber is supplied to the second storage chamber through the return duct and the cooler.

It is sectional drawing of the storage which concerns on 1st Embodiment of this invention. It is a block diagram which shows the electric composition of the storage shown in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Hereinafter, the storage of one embodiment will be described with reference to the drawings. The storage of the present embodiment is a refrigerator 1 in which a storage chamber provided inside is cooled to a predetermined temperature.

As shown in FIG. 1, the refrigerator 1 according to the present embodiment includes a cabinet 2 formed of a heat insulating box body that opens to the front. The cabinet 2 is configured to have a heat insulating material such as a vacuum heat insulating material or a foam heat insulating material in a heat insulating space 5 formed between the outer box 3 made of steel plate and the inner box 4 made of synthetic resin. The cabinet 2 is provided with a plurality of storage spaces inside the inner box 4, and the storage spaces are vertically partitioned by a heat insulating partition wall 6.

The space above the heat insulating partition wall 6 is a storage chamber cooled in a refrigerating temperature zone (for example, 1 to 4 ° C.), and the inside is further divided into upper and lower parts by the partition wall 7 and a plurality of stages above the partition wall 7. A refrigerating room 10 provided with a storage shelf for the above is provided, and a vegetable room 12 is provided below the partition wall 7.

The inside of the refrigerator compartment 10 is divided into a plurality of upper and lower stages by a plurality of shelf boards 9. A chilled chamber 8 for storing a drawer-type chilled container is provided in a space partitioned vertically by a partition wall 7 and a lowermost shelf board 9. A refrigerating temperature sensor 25 for measuring the temperature inside the refrigerating chamber 10 is provided on the back surface of the refrigerating chamber 10. A rotary refrigerator door 11 pivotally supported by a hinge is provided at the front opening of the refrigerator compartment 10.

The front opening of the vegetable compartment 12 is closed by a drawer-type vegetable compartment door 13. A pair of left and right support frames for holding the storage container 14 are fixed to the inside of the vegetable compartment door 13, so that the storage container 14 is pulled out of the storage container 14 as the door is opened. A door sensor 29 is provided on the peripheral edge of the front opening of the vegetable compartment 12 to detect whether the vegetable compartment door 13 is in the open state or the closed state.

In the space below the heat insulating partition wall 6, an ice making chamber (not shown) equipped with an automatic ice maker and a first freezing chamber 16 are provided on the left and right, and a second freezing chamber 17 is provided below the ice making chamber 17 via a partition plate 22. Is provided.

The ice making chamber, the first freezing chamber 16, and the second freezing chamber 17 are all cooled to a freezing temperature range (for example, −17 ° C. or lower). A freezing temperature sensor 26 for measuring the temperature inside the second freezing chamber 17 is provided on the back surface of the second freezing chamber 17.

The openings of the ice making chamber, the first freezing chamber 16, and the second freezing chamber 17 are closed by the pull-out doors 18 and 19 as in the vegetable compartment 12. Storage containers 20 and 21 are held by a pair of left and right support frames fixed to the back side of each door 18 and 19, and the storage containers 20 and 21 are configured to be pulled out of the refrigerator when the door is opened. There is.

At the rear of the refrigerating room 10 and the vegetable room 12, there are a refrigerating cooler room 32 partitioned by an EVA cover 23 in the front-rear direction, a duct 33 connecting the refrigerating room 10 and the refrigerating cooler room 32, and the refrigerating room 10 and the vegetable room. A return duct 44 connecting the 12 and the refrigerating cooler chamber 32 is formed.

The refrigerating cooler room 32 houses the refrigerating cooler 30, the refrigerating fan 31, and the drain pan 27, and the air in the refrigerating cooler room 32 cooled by the refrigerating cooler 30 is passed through the duct 33 by the refrigerating fan 31. Supply to the refrigerator compartment 10.

The drain pan 27 is arranged in a return duct 44 that returns the air flowing through the refrigerating chamber 10 and the vegetable compartment 12 to the refrigerating cooler 30 so as to be located below the refrigerating cooler 30, and is refrigerated during the defrosting operation. Receives condensed water (defrosted water) generated from the cooler 30. The condensed water collected in the drain pan 27 is discharged to the evaporating dish 41 arranged in the machine room 38 provided in the lower part of the back surface of the cabinet 2 via the drain hose 28.

The drain hose 28 that discharges the condensed water accumulated in the drain pan 27 to the machine room 38 is inserted into the insertion hole 2a that connects the refrigerating cooler room 32 and the machine room 38 provided on the back wall of the cabinet 2 and is refrigerated. It is pulled out from the cooler chamber 32 to the machine chamber 38.

The insertion hole 2a provided in the cabinet 2 has a larger diameter than the drain hose 28 to be inserted. Therefore, with the drain hose 28 inserted in the insertion hole 2a, a gap is formed between the insertion hole 2a and the drain hose 28, which is continuously connected from the refrigerating cooler chamber 32 to the machine chamber 38. That is, the gap formed between the insertion hole 2a and the drain hose 28 functions as a ventilation hole 2c that communicates the vegetable chamber 12 and the machine chamber 38.

Further, in the vegetable compartment 12, an oxygen separation module 60 is provided below the refrigerator / cooler chamber 32 partitioned by the EVA cover 23. The oxygen separation module 60 includes an oxygen separation film 62 provided on the front surface of the box-shaped case 61, and the oxygen separation film 62 faces the back surface of the storage container 14.

The oxygen separation membrane 62 partitions the vegetable compartment 12 and the inside of the case 61 back and forth, and when a pressure difference is generated on both sides of the oxygen separation membrane 62, oxygen in the air on the high pressure side diffuses and moves inside the membrane, and the surface on the low pressure side. By separating from, the oxygen concentration on the low pressure side is lowered.

The inside of the case 61 is connected by an exhaust pump 63 and an exhaust hose 64 arranged in a machine room 38 provided in the lower part of the back surface of the cabinet 2, and the air inside the case 61 is sucked by the operation of the exhaust pump 63. , Exhaust from the machine room 38 to the outside of the cabinet 2.

The exhaust hose 64 that exhausts oxygen that has passed through the oxygen separation film 62 to the machine room 38 is inserted into an insertion hole 2b that connects the vegetable room 12 and the machine room 38 provided on the back wall of the cabinet 2, and is inserted into the vegetable room 12 It is drawn out from the oxygen separation module 60 provided in the machine room 38 to the machine room 38. As illustrated in FIG. 1, the insertion hole 2a through which the drain hose 28 is inserted and the insertion hole 2b through which the exhaust hose 64 is inserted may be combined in the middle to form one insertion hole.

At the rear of the ice making chamber, the first freezing chamber 16, and the second freezing chamber 17, there are a freezing cooler chamber 36 partitioned by an EVA cover 24 in the front and rear, and an ice making chamber, a first freezing chamber 16, and a second freezing chamber 17. And a duct 37 connecting the refrigerating cooler chamber 36 and the refrigerating cooler chamber 36 are formed. A freezing cooler 34 and a freezing fan 35 are housed in the freezing cooler room 36, and the air in the freezing cooler room 36 cooled by the freezing cooler 34 is passed through a duct 37 by the freezing fan 35 to the ice making room. It is supplied to 1 freezing chamber 16 and 2nd freezing chamber 17.

The refrigerating cooler 30 and the freezing cooler 34 form a refrigerating cycle together with the compressor 39 and the condenser (not shown) housed in the machine room 38. In the refrigeration cycle, the refrigerant discharged from the compressor 39 is supplied to one of the refrigerating cooler 30 and the refrigerating cooler 34 by the switching valve 47 (see FIG. 2) to bring the refrigerating cooler 30 and the refrigerating cooler to a predetermined temperature. 34 is cooled.

The refrigerating cooler 30 cools the air in the refrigerating cooler chamber 32 to generate, for example, cold air at −10 to −20 ° C. The generated cold air is supplied to the refrigerating chamber 10 from the air outlet 33a via the duct 33 by the rotation of the refrigerating fan 31 to cool the refrigerating chamber 10. A part of the air flowing through the refrigerating chamber 10 flows into the return duct 44 from the suction port 42 provided at the rear of the partition wall 7 and returns to the refrigerating cooler chamber 32, and the remaining air is a series provided in the partition wall 7. It flows into the vegetable compartment 12 through the passage 7a.

The cold air that has flowed into the vegetable compartment 12 from the communication passage 7a cools the inside of the vegetable compartment 12 while flowing from the front to the rear outside the storage container 14 provided in the vegetable compartment 12 as shown by an arrow in FIG. After that, the cold air flowing from the front to the rear on the outside of the storage container 14 passes between the storage container 14 and the oxygen separation membrane 62 provided on the oxygen separation module 60, and faces upward from the lower back surface of the storage container 14. The flow flows into the return duct 44 from the suction port 43 provided in the upper part of the back surface of the vegetable compartment 12, and returns to the refrigerating cooler chamber 32. The cold air returned to the refrigerating cooler chamber 32 exchanges heat with the refrigerating cooler 30 and is cooled again.

That is, in the refrigerator 1, the duct 33, the refrigerating chamber 10, the communication passage 7a of the partition wall 7, the front side of the storage container 14 of the vegetable compartment 12, and the vegetable chamber 12 side (that is, the front side) of the oxygen separation film 62 of the oxygen separation module 60. , And the return duct 44 form a circulation air passage that returns the cold air blown out from the refrigerating fan 31 to the refrigerating cooler chamber 32 through the refrigerating chamber 10 and the vegetable compartment 12.

The freezing cooler 34 cools the air in the freezing cooler chamber 36 to generate, for example, cold air at −20 to −30 ° C. The generated cold air is supplied to the ice making chamber, the first freezing chamber 16 and the second freezing chamber 17 through the duct 37 by the rotation of the refrigerating fan 35, and cools these storage chambers. The air that has cooled the ice making chamber and the first freezing chamber 16 flows into the second freezing chamber 17 through a through hole (not shown). It merges with the cold air supplied to the second freezing chamber 17, and then returns to the refrigerating cooler chamber 36 from the suction port 45 provided on the back surface of the second freezing chamber 17 through the return duct 46, and becomes the freezing cooler 34. It exchanges heat and is cooled again.

A control unit 50 that controls the overall operation of the refrigerator 1 is provided on the upper portion of the back surface of the cabinet 2. As shown in FIG. 2, the control unit 50 is stored in a memory 51 made of a non-volatile recording medium such as an EEPROM and signals input from various sensors such as a refrigerating temperature sensor 25, a refrigerating temperature sensor 26, and a door sensor 29. By controlling various electric parts such as the refrigerating fan 31, the refrigerating fan 35, the compressor 39, the switching valve 47, and the exhaust pump 63 based on the control program, each room is cooled to a predetermined temperature and the vegetable room 12 is used. Reduce the oxygen concentration inside.

Specifically, when cooling the refrigerating chamber 10 and the vegetable compartment 12 in the refrigerating temperature zone, the control unit 50 switches the switching valve 47 provided in the refrigerating cycle so that the refrigerant flows to the refrigerating cooler 30. At the same time, the refrigerating cooling mode for operating the refrigerating fan 31 is executed. As a result, the air in the refrigerating cooler chamber 32 cooled by the refrigerating cooler 30 is blown to the refrigerating chamber 10 and the vegetable compartment 12 through the duct 33, and the refrigerating temperature sensor 25 provided on the back surface of the refrigerating chamber 10 The refrigerator compartment 10 and the vegetable compartment 12 are cooled so that the detected temperature falls within a predetermined temperature range.

When cooling the ice making chamber, the first freezing chamber 16, and the second freezing chamber 17, the control unit 50 switches the switching valve 47 provided in the refrigerating cycle so that the refrigerant flows to the refrigerating cooler 34. At the same time, the refrigerating / cooling mode for operating the refrigerating fan 35 is executed. As a result, the air cooled by the refrigerating cooler 34 is blown to the ice making chamber, the first freezing chamber 16, and the second freezing chamber 17, and the detection temperature of the refrigerating temperature sensor 26 provided on the back surface of the second freezing chamber 17. The ice making chamber, the first freezing chamber 16, and the second freezing chamber 17 are cooled so that the temperature falls within a predetermined temperature range.

Further, in order to reduce the oxygen concentration in the vegetable compartment 12, the exhaust pump 63 provided in the machine chamber 38 is operated. As a result, in the oxygen separation module 60, the inside of the case 61 becomes lower pressure than the space on the vegetable chamber 12 side of the oxygen separation membrane 62, so that the oxygen in the vegetable chamber 12 permeates through the oxygen separation membrane 62 and passes through the exhaust hose 64. It is exhausted to the outside of the cabinet 2, and as a result, the oxygen concentration in the vegetable compartment 12 decreases.

The vegetable compartment 12 communicates with the outside of the cabinet 2 via a ventilation hole 2c formed between the insertion hole 2a provided in the cabinet 2 and the drain hose 28, and the oxygen in the vegetable compartment 12 communicates with the outside of the cabinet 2. Even if the air is discharged to the outside of the cabinet 2 through the 62, the air outside the refrigerator does not enter through the ventilation holes 2c and the pressure inside the vegetable compartment 12 does not decrease. Therefore, in the refrigerator 1 of the present embodiment, it is not necessary to provide the vegetable compartment 12 in an airtight and pressure-resistant structure, and the effective internal volume of the refrigerator does not decrease or the door 13 does not become difficult to open.

Further, since the open end of the ventilation hole 2c inside the cabinet 2 (inside the refrigerator) is arranged in the return duct 44 that returns the air flowing in the vegetable compartment 12 to the refrigerator / cooler 30, the cabinet 2 is provided from the ventilation hole 2c. The air taken into the inside of the cabinet 2 (outside the cabinet) is supplied to the refrigerating chamber 10 and the vegetable compartment 12 after passing through the refrigerating cooler 30. Therefore, even if warm air outside the refrigerator enters the refrigerator, it can be cooled by the refrigerator cooler 30 and then supplied to the vegetable compartment 12, and the temperature rise inside the vegetable compartment 12 and the refrigerator compartment 10 can be suppressed. it can.

Further, in the present embodiment, since the refrigerating chamber 10 communicates with the vegetable chamber 12 provided with the oxygen separation module 60 via the communication passage 7a, the oxygen concentration of not only the vegetable compartment 12 but also the refrigerating chamber 10 is reduced. Can be done. Moreover, since the refrigerating chamber 10 is partitioned by the vegetable compartment 12 provided with the oxygen separation module 60 and the partition wall 7, the oxygen concentration can be different between the vegetable compartment 12 and the refrigerating chamber 10 for storage. Spaces with different oxygen concentrations can be provided according to the object. For example, when the oxygen concentration in the atmosphere is 20.9%, the oxygen concentration in the vegetable compartment 12 can be set to 18% and the oxygen concentration in the refrigerator compartment 10 can be set to 19%.

Further, in the present embodiment, the space sandwiched between the storage container 14 and the oxygen separation film 62 of the oxygen separation module 60 is one of the circulation air passages that returns to the refrigerating cooler room 32 through the refrigerating room 10 and the vegetable room 12. Since the vegetable chamber 12 side of the oxygen separation film 62 is provided in the circulation air passage, the cooling fan 31 blows the cold air generated by the refrigerating cooler 30 to the refrigerating chamber 10 and the vegetable compartment 12. As a result, air having a low oxygen concentration does not stay on the vegetable chamber 12 side of the oxygen separation film 62, and the oxygen concentration in the entire vegetable chamber 12 can be reduced to a desired concentration.

(Change example 1)
In the refrigerator 1 of the above-described embodiment, the exhaust pump 63 can be operated at an arbitrary timing to reduce the oxygen concentration in the vegetable compartment 12 and the refrigerating chamber 10, but for example, the refrigerant flows through the refrigerating cooler 30. It is preferable to operate the exhaust pump 63 during the execution of the refrigerating / cooling mode in which the refrigerating fan 31 is operated while switching the switching valve 47.

By operating the exhaust pump 63 during the execution of the refrigerating / cooling mode, the air outside the cabinet 2 (outside the refrigerator) taken into the inside of the cabinet 2 through the ventilation holes 2c is supplied with a refrigerant to lower the temperature of the refrigerating cooler. Since it is cooled by 30 and then supplied to the refrigerating room 10 and the vegetable room 12, it is possible to suppress an increase in the temperature inside the refrigerator room 12 and the refrigerating room 10.

When operating the exhaust pump 63 during the execution of the refrigerating / cooling mode, after the door sensor 29 detects the opening / closing of the vegetable compartment door 13, the exhaust pump 63 is operated during the first refrigerating / cooling mode to be executed, and the second and subsequent times. It is preferable not to operate the exhaust pump 63 in the refrigerating / cooling mode to be executed.

If the vegetable compartment door 13 is not opened or closed after the first refrigerating / cooling mode is executed after the door sensor 29 detects the opening / closing of the vegetable compartment door 13, there is almost no change in the oxygen concentration in the vegetable compartment 12 and the oxygen concentration is low. Since the state is maintained, unnecessary operation of the exhaust pump 63 can be reduced and power consumption can be reduced by not operating the exhaust pump 63 in the refrigerating / cooling mode executed from the second time onward. .. In such control, it is preferable to operate the exhaust pump 63 when the door sensor 29 does not detect the opening / closing of the vegetable compartment door 13 continuously for a predetermined time. Even if the door sensor 29 does not detect the opening / closing of the vegetable compartment door 13 and the vegetable compartment door 13 continues to be closed, the exhaust pump 63 does not operate continuously for a predetermined time and the oxygen in the vegetable compartment 12 is in the cabinet. 2 If the vegetable chamber 12 is not discharged to the outside, the oxygen concentration in the vegetable compartment 12 may increase. However, when the door sensor 29 does not detect the opening / closing of the vegetable compartment door 13 continuously for a predetermined time, the exhaust pump 63 is operated to operate the exhaust pump 63. Even when the user does not use the refrigerator 1 for a certain period of time, the low oxygen state can be maintained for a long period of time.

Further, even if the first refrigerating / cooling mode is being executed after the door sensor 29 detects the opening / closing of the vegetable compartment door 13, the exhaust pump 63 of the exhaust pump 63 is used until a predetermined time elapses after the previous operation of the exhaust pump 63. The operation may be prohibited. Even when the vegetable compartment door 13 is repeatedly opened and closed in a short time as during cooking work, the exhaust pump 63 does not repeatedly operate and stop each time the vegetable compartment door 13 is opened and closed, and an unnecessary exhaust pump is used. The operation of the 63 can be reduced to reduce the power consumption, and the deterioration of the exhaust pump 63 can be suppressed.

(Change example 2)
In the refrigerator 1 of the above-described embodiment, the exhaust pump 63 for exhausting the air in the case 61 of the oxygen separation module 60 is provided in the machine room 38 outside the cabinet 2. It may be provided indoors. By providing the exhaust pump 63 in the storage chamber in this way, the operating temperature of the exhaust pump 63 can be lowered, and the life of the exhaust pump 63 can be extended.

(Change example 3)
In the refrigerator 1 of the above-described embodiment, the case where the open end inside the cabinet 2 of the ventilation hole 2c is arranged in the return duct 44 has been described. For example, between the refrigerator compartment door 11 or the vegetable compartment door 13 and the cabinet 2. The air outside the cabinet 2 may be introduced from the ventilation holes 2c provided in the gasket provided in the refrigerator 2 to seal the two, and the oxygen separation module 60 is provided such as the ceiling wall of the cabinet 2 constituting the upper part of the refrigerator compartment 10. Air outside the cabinet 2 may be introduced through a ventilation hole provided in a storage chamber different from the storage chamber.

By providing the open end inside the cabinet 2 of the ventilation hole 2c at a position away from the oxygen separation module 60 in this way, the oxygen in the vicinity of the oxygen separation module 60 is likely to decrease.

(Change example 4)
In the refrigerator 1 of the above-described embodiment, the case where the oxygen separation module 60 diffuses and moves the oxygen in the vegetable chamber 12 inside the membrane by the pressure difference on both sides of the oxygen separation membrane 62 and exhausts it to the outside of the cabinet 2 has been described. The oxygen separation module 60 includes a hollow fiber membrane that separates compressed air into an oxygen-enriched gas and a nitrogen-enriched gas, compresses the air in the vegetable compartment 12 and supplies it to the inside of the hollow fiber membrane, and separates the oxygen rich. The chemical gas may be configured to be exhausted to the outside of the cabinet 2.

Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Refrigerator, 2 ... Insulated box body, 2a ... Insert hole, 2b ... Insert hole, 2c ... Vent hole, 3 ... Outer box, 4 ... Inner box, 5 ... Insulated space, 6 ... Insulated partition wall, 7 ... Partition wall , 7a ... duct, 8 ... chilled room, 9 ... shelf board, 10 ... refrigerating room, 11 ... refrigerating room door, 12 ... vegetable room, 13 ... vegetable room door, 14 ... storage container, 16 ... first freezer room, 17 ... 2nd freezer, 22 ... partition plate, 25 ... refrigerating temperature sensor, 26 ... refrigerating temperature sensor, 27 ... drain pan, 28 ... drain hose, 29 ... door sensor, 30 ... refrigerating cooler, 31 ... refrigerating fan, 32 ... Refrigerator room, 33 ... Duct, 34 ... Refrigerator, 35 ... Refrigerator fan, 36 ... Refrigerator room, 37 ... Duct, 38 ... Machine room, 39 ... Compressor, 40 ... Condenser, 41 ... Evaporator, 42 ... Suction port, 43 ... Suction port, 44 ... Return duct, 45 ... Suction port, 46 ... Return duct, 47 ... Switching valve, 50 ... Control unit, 60 ... Oxygen separation module, 61 ... Case, 62 ... Oxygen separator, 63 ... Exhaust pump, 64 ... Exhaust hose

Claims (6)

The first storage room formed inside the cabinet and
A second storage chamber formed inside the cabinet and communicating with the first storage chamber,
The oxygen separation membrane provided in the first storage chamber and
An exhaust means for exhausting air in a space communicating with the second storage chamber in the first storage chamber that has passed through the oxygen separation membrane to the outside of the cabinet.
A vent that communicates the first storage chamber with the outside of the cabinet,
The compressor, a cooler that generates cold air from the refrigerant supplied from the compressor, a fan that blows the cold air generated by the cooler, and the cold air blown out from the fan are the second storage chamber and the first. It is equipped with a circulating air passage that sequentially passes through the storage chamber and returns to the cooler.
Said air circulation duct is provided with a return duct for returning the air which has flowed through the first storage compartment to the cooler, the vent hole is provided in the return duct,
A storage in which air in the first storage chamber is supplied to the second storage chamber through the return duct and the cooler. The storage according to claim 1, wherein the exhaust means is operated during a cooling operation in which the compressor and the fan are operated to cool the first storage chamber. A door for opening and closing an opening provided in the first storage chamber and a door sensor for detecting the opening and closing of the door are provided.
The storage according to claim 2, wherein the exhaust means is operated during the first cooling operation after the door sensor detects that the door is closed. The storage according to claim 3, wherein the operation of the exhaust means is prohibited until a predetermined time elapses after the operation of the exhaust means. The storage according to claim 2, wherein the first storage chamber side of the oxygen separation membrane is provided in the circulation air passage. The storage according to claim 3 or 4, wherein the door sensor operates the exhaust means when the door sensor does not continuously detect the opening / closing of the door for a predetermined time after the operation of the exhaust means is completed.

Images