A refrigerating and freezing device comprises a box body, a modified atmosphere film assembly and a suction pump. The box body has an inner container, a casing and a heat insulation layer; the inner container is internally provided with a storage space; the modified atmosphere film assembly is configured in such a way that more oxygen, relative to nitrogen, of a gas flow in a space around the modified atmosphere film assembly penetrates a modified atmosphere film and enters a rich-oxygen gas collecting cavity; and the suction pump is provided in the heat insulation layer, and an inlet end of the air extracting pump, through a pipeline, is in communication with the oxygen-rich gas collecting cavity of the modified atmosphere film assembly to pump and discharge the gas penetrated into the oxygen-rich gas collecting cavity out of a storage container.

An air-regulating freshness-preserving storage device comprises a container having a first storage space defined therein; and an oxygen removal device configured to remove a part or all of oxygen in air in the first storage space, so as to obtain the air rich in nitrogen, low in oxygen, and favorable for food preservation.

A refrigerator comprises a refrigerator body, an air-conditioning membrane assembly and an air pump assembly. The refrigerator body defines a storage space and a compressor chamber therein, a storage container is arranged in the storage space, and a freshness-keeping space is defined inside the storage container. The air-conditioning membrane assembly is configured to allow more oxygen than nitrogen in airflow in a surrounding space of the air-conditioning membrane assembly to pass through the air-conditioning membrane and enter an oxygen-rich gas collection chamber. An inlet end of the air pump is communicated with the oxygen-rich gas collection chamber in a controlled manner via a pipeline and a pipeline switching mechanism, for pumping gas in the oxygen-rich gas collection chamber to the outside of the freshness-keeping space, such that the actual content of oxygen in the freshness-keeping space is in a range of 2% to 19%.

An air separation device and a refrigerating and freezing device. The air separation device comprises a support frame and an air separation membrane, wherein a supporting surface with a channel and an enriched-gas collection chamber communicated with the channel are formed in the support frame. The air separation membrane laid on the support surface of the support frame and configured to enable more of a specific gas than other gases in airflow of the space around the air separation device to enter the enriched-gas collection chamber through the air separation membrane. According to the air separation device provided by the present invention, the support frame is specially designed to adopt the structure provided with the support surface and the enriched-gas collection chamber, the channel communicated with the enriched-gas collection chamber is formed on the support surface, and the air separation membrane is disposed on the support surface.

A refrigerator comprises a refrigerator body, an air-conditioning membrane assembly and an air pump assembly. The refrigerator body defines a storage space and a compressor chamber therein, a storage container is arranged in the storage space, and a freshness-keeping space is defined inside the storage container. The air-conditioning membrane assembly is provided with at least one air-conditioning membrane and an oxygen-rich gas collection chamber and configured to allow more oxygen than nitrogen in airflow in a surrounding space of the air-conditioning membrane assembly to pass through the air-conditioning membrane and enter the oxygen-rich gas collection chamber. An air pump pumps gas in the oxygen-rich gas collection chamber to the outside of the freshness-keeping space, such that a ratio of the content of nitrogen in the freshness-keeping space to the content of oxygen in the freshness-keeping space is greater than 78/21.

An active element for trapping and/or releasing a gaseous or liquid substance is provided including a solid body, which is enveloped by an outer boundary surface (S), and contains an active material adapted to trap and/or release a gaseous or liquid substance, wherein the outer boundary surface S has an overall roundish, preferably round shape. The active element is manufactured by injection moulding and can be utilized within a container.

A refrigerator comprises a refrigerator body, an air-conditioning membrane assembly and an air pump assembly. The refrigerator body defines a storage space and a compressor chamber therein, a storage container is arranged in the storage space, and a freshness-keeping space is defined inside the storage container. The air-conditioning membrane assembly is configured to allow more oxygen than nitrogen in airflow in a surrounding space of the air-conditioning membrane assembly to pass through the air-conditioning membrane and enter an oxygen-rich gas collection chamber. An inlet end of the air pump is communicated with the oxygen-rich gas collection chamber in a controlled manner via a pipeline and a pipeline switching mechanism, for pumping gas in the oxygen-rich gas collection chamber to the outside of the freshness-keeping space, such that the actual content of oxygen in the freshness-keeping space is in a range of 2% to 19%.

A food container for wicking moisture from a food product stored in the container including a food receptacle having an interior volume and an opening for permitting a food product to be placed in and removed from the receptacle, a lid adapted for being positioned onto and sealing the opening, a desiccant reservoir positioned on an underside of the lid for being exposed to the interior volume of the receptacle and adapted for containing a desiccant material, and a plurality of apertures in the reservoir for allowing air flow communication between the interior of the receptacle and the reservoir whereby moisture given off by the food product contained in the receptacle is absorbed by the desiccant material to aid in maintaining freshness of the food.

The invention discloses a method for adsorbing ethylene gas using amorphous granular starch. The method firstly prepares amorphous granular starch, wherein starch slurry is prepared from starch with a ethanol aqueous solution and NaOH solution is added dropwise so as to react at 30 to 35 C. for 20 to 50 minutes; Then the slurry is centrifuged, neutralized with an ethanol hydrochloride solution, washed and dried to obtain the amorphous granular starch. The amorphous granular starch is placed in a high-pressure reactor and ethylene gas is introduced after the reactor is vacuumized to react at 0.8 to 1.5 Mpa and 20 to 30 C. for 15 to 25 h so that starch powder product adsorbing with ethylene is obtained. The test result shows that the content of ethylene in the obtained product can reach more than 30%. The method is simple, highly efficient and cheap for the adsorption process of ethylene, and the product is expected to be widely applied in the field of fruit and vegetable modified atmosphere preservation.

A vent filter (1), preferably for a pure liquid storage tank, comprising a cylindrical shell (2), at least one compartment (A) for accommodating granular filter material (3), said at least one compartment (A) defined between an inner peripheral surface (4) of the shell (2) and a pair of spaced apart separator plates (5) arranged in the shell (2) such that the spacing of the separator plates (5) in the axial direction of the shell (2) can be changed and fixed so as to apply a pressure on the granular filter material (3) in the at least one compartment (A). An air inlet (6) and an air outlet (7) are respectively arranged to allow a flow of air through the granular filter material (3) in the at least one compartment (A).