114results about How to "Guaranteed respiration" patented technology

The invention relates to a refrigeration and freezing device and a drawer assembly thereof. The drawer assembly comprises a barrel body with the front side opened, a drawer capable of being inserted into the barrel body in a front-and-back push-and-pull manner and an electric control lock mechanism. The electric control lock mechanism is configured to be controllably switched to a locking state so as to lock the drawer to the barrel body or switched to an unlocking state so as to relieve locking on the drawer when the drawer is completely pushed into the barrel body. The electric control lock mechanism is provided with an unlocking button protruding and extending downwards, and the unlocking button is configured to be capable of enabling the electric control lock mechanism to be switched to the unlocking state from the locking state when pressed upwards. According to the refrigeration and freezing device and the drawer assembly thereof, the drawer and the barrel body can achieve automatic locking and unlocking, user operation is facilitated, and the drawer can still be unlocked when the electric control lock mechanism is powered off or breaks down.

The invention relates to a gas suction pump assembly and a cold storage and freezing device. The gas suction pump assembly comprises a sealing box and a gas suction pump; two connecting pipes used for communicating the inner space of the sealing box with the outer space of the sealing box are embedded in the sealing box; the end portions, located on the inner side and the outer side of the sealing box, of each connecting pipe are each a pagoda-shaped connector facilitating sleeved arrangement of a soft pipe; the gas suction pump is arranged in the sealing box; a gas inlet pipe of the gas suction pump is connected to one connecting pipe through the corresponding soft pipe; and a gas outlet pipe of the gas suction pump is connected with the other connecting pipe through the corresponding soft pipe. The gas suction pump assembly is small in running noise, the disassembling and assembling process in the cold storage and freezing device is quite convenient, and the gas inlet pipe and the gas outlet pipe of the gas suction pump can be conveniently led out of the sealing box.

The invention relates to a sucking pump assembly and a refrigerating and freezing device. The sucking pump assembly comprises a mounting bottom plate, a sealed box and a sucking pump, wherein a blocking part extending upwards is arranged on the rear portion of the upper surface of the mounting bottom plate; the front surface of the blocking part is sunken backwards to form a positioning sunken part; the sealed box is provided with an air inlet connecting pipe and an air outlet connecting pipe which communicate the inside and the outside of the sealed box; the air inlet connecting pipe, the air outlet connecting pipe and the sealed box are integrally molded and formed; a positioning protrusion part protruding backwards is arranged on the rear portion of the sealed box; the sealed box is located on the upper side of the mounting bottom plate; the positioning protrusion part is clamped into the positioning sunken part; the front portion of the sealed box is locked to the mounting bottom plate; the sucking pump is arranged in the sealed box in the mode that the axis of the sucking pump extends in the horizontal direction; an air inlet of the sucking pump is connected to the air inlet connecting pipe through a hose; and an air outlet of the sucking pump is connected to the air outlet connecting pipe through a hose. The sucking pump assembly is low in operation noise, the dismounting process of the sucking pump assembly in the refrigerating and freezing device is quite convenient, and the occupied height space is small.

The invention provides a cold storage and refrigerating device with the air adjustment refreshing function. The cold storage and refrigerating device comprises a box body, an air adjustment refreshing system and a working condition detection system. A storing space is defined inside the box body, and an airtight air adjustment refreshing subspace is formed in the storing space. The air adjustment refreshing system comprises an air adjustment membrane component and an air extracting pump. The air extracting pump is arranged in the way that gas in the air adjustment refreshing subspace is permeated through the air adjustment membrane component so that a gas atmosphere facilitating food preservation can be formed in the air adjustment refreshing subspace of the storing space. The working condition detection system is arranged to detect the working state of the air adjustment membrane component and the air extracting pump and to output prompt information when the working state is abnormal. According to the cold storage and refrigerating device, the air adjustment refreshing system is high in working reliability, and the refreshing degree of food stored in the air adjustment refreshing subspace can be effectively prolonged.

The invention relates to a sugarcane seedling culture method. The method comprises the steps of preparing sugarcane seedling culture matrix, laying the sugarcane seedling culture matrix, sowing seeds, and moving a sowing frame to a greenhouse provided with a sunshade net and peripherally covered with thin film to perform seedling management. According to the method, the matrix is rich in nutrition, the seedling culture operation is simple, the seedling culture cost is low, and the method can be popularized and used on a large scale. According to the sugarcane seedling culture method, the average germination rate of seeds reaches 98.4%, the average survival rate of temporary planting reaches 99.0%, and obtained sugarcane seedlings are robust and excellent.

The invention relates to a weathered bedrock hydro-fluctuation belt land seedling cultivation and water growth tree planting method. Because of seasonal water level rise and fall, the weathered bedrock area of the submerged land around a reservoir area exposes periodically, and the method is used for permanently greening the weathered bedrock area by planting trees. The method is characterized in that according to the rise and fall gradient of the water level, root-control container seedlings with corresponding sizes are cultivated on the land, so that land cultivation is completed, then, planting holes are dug on the weathered bedrock hydro-fluctuation belt, planting is directly carried out, and water growth is completed. With any water level, planted water-tolerant hygrophilous trees can partially expose out of the water surface, the photosynthesis and respiration of seedlings can be guaranteed, the phenomenon that soil at the roots of trees is washed out year after year is prevented, the growth of the trees is stabilized, the species of diversity is enriched, and the strong slope protection and soil fixation effects are achieved.

The invention relates to a refrigerating and freezing device and a drawer assembly thereof. The drawer assembly comprises a barrel with an open front side, a drawer and two sliding rail assemblies. The drawer can be inserted into the barrel in a front-back push-pull manner, and the sliding rail assemblies are arranged at the two transverse ends in the barrel. Each sliding rail assembly comprises an outer rail, and the outer rail is fixed into the barrel in the manner of extending in the front-back direction. An inner rail is arranged on the outer rail in the manner of sliding in the front-back direction and is supported by the outer rail and fixed to the drawer. A lock disc is hinged to the rear end of the outer rail in the manner of rotating around a transverse axis, and a front clamping column and a rear clamping column protruding in the transverse direction are arranged on the lock disc. A clamping head is arranged at the rear end of the inner rail and provided with a protruding part protruding upwards or downwards. In the process of pushing the drawer into the barrel, the rear end of the protruding part abuts against the rear clamping column to push the lock disc to rotate to enable the front clamping column to be attached to the front side of the protruding part, so that the inner rail and the drawer are locked. An elastic element is configured to apply resisting torque to the lock disc when the protruding part pushes the lock disc to rotate, and when the front clamping column is attached to the front side of the protruding part, torque in the direction opposite to the direction of the resisting torque is applied to the lock disc.

The invention provides a refrigerating and freezing device which comprises a box, a plurality of air-conditioning film components and a sucking pump component, wherein a storage space and a compressor cabin are limited in the box, and a plurality of preservation spaces are arranged in the storage space; each of the air-conditioning film components is equipped with at least one air-conditioning film and an oxygen-rich air collecting chamber and is arranged for causing more oxygen relative to nitrogen in surrounding space airflow of each air-conditioning film component penetrate through the air-conditioning film and enter the oxygen-rich air collecting chamber; and the sucking pump component is arranged in the compressor cabin and is arranged for pumping air in the oxygen-rich air collecting chamber of each preservation space having an air-conditioning requirement out of the preservation space having the air-conditioning requirement. The refrigerating and freezing device provided by the invention utilizes one sucking pump to realize the air conditioning for the plurality of preservation spaces in the storage space, and different atmospheres are realized for different articles stored in different preservation spaces, so that the preservation requirements for different articles can be fully met.

The invention relates to a refrigerator and a storage container assembly for the refrigerator. The storage container assembly comprises at least one oxygen-rich film assembly and an oxygen permeation amount adjusting device which is arranged to adjust the oxygen permeation area of at least one oxygen-rich film assembly. Each oxygen-rich film assembly is arranged on a cylinder, wherein surrounding space of the oxygen-rich film assembly communicates with controlled atmosphere fresh keeping space. Each oxygen-rich film assembly is provided with at least one oxygen-rich film and an oxygen-rich gas collecting cavity and is arranged to make more oxygen in airflow in the surrounding space of the oxygen-rich film assembly enter the oxygen-rich gas collecting cavity through the oxygen-rich film relative to nitrogen in the airflow in the surrounding space of the oxygen-rich film assembly. In addition, the invention further provides the refrigerator with the storage container assembly. According to the refrigerator and the storage container assembly for the refrigerator, through exhausting of oxygen in the controlled atmosphere fresh keeping space, the nitrogen-rich and oxygen-deficient gas atmosphere facilitating food fresh keeping is obtained in the space, and the oxygen exhausting capability of the controlled atmosphere fresh keeping space can be adjusted within a certain range by adjusting the oxygen permeation area of the oxygen-rich film assemblies.

The invention relates to a drawer module and a refrigerating and freezing device with the drawer module. The drawer module comprises a cylinder and a controlled atmosphere membrane module, wherein drawer space is limited in the cylinder; an accommodating cavity is limited in the top wall of the cylinder, and is communicated with the drawer space; the controlled atmosphere membrane module is mounted in the accommodating cavity, and has a controlled atmosphere membrane and an oxygen-enriched gas collecting cavity; and the controlled atmosphere membrane module is configured to enable more oxygen in the accommodating cavity to enter the oxygen-enriched gas collecting cavity through the controlled atmosphere membrane compared with nitrogen in the accommodating cavity. The drawer module can form rich nitrogen and lean oxygen in the drawer space to facilitate a gas atmosphere for food preservation, reduces the aerobic respiration strength of fruits and vegetables, and meanwhile, guarantees basic breathing effect to prevent anaerobic respiration of the fruits and the vegetables so as to achieve the purpose of long-time preservation of the fruits and the vegetables. The drawer module occupies no storage space, and can prevent collision from damaging the controlled atmosphere membrane module.

The invention relates to a refrigerating and freezing device and a drawer assembly thereof. The drawer assembly comprises a tank with the front side open, a drawer capable of being inserted into the tank in a front-back push-pull mode, an electronic control lock mechanism arranged on the rear side of the outer portion of the tank and an unlocking lead, wherein the electronic control lock mechanism can be controlled to be switched to a locking state so as to lock the drawer to the tank wen the drawer is pushed into the tank completely or switched to an unlocking state so as to unlock the drawer; the unlocking lead extends from the front end of the tank to the electronic control lock mechanism along the outer surface of the tank; the electronic control lock mechanism can be switched from the locking state to the unlocking state when the unlocking lead is pulled. According to the refrigerating and freezing device and the drawer assembly thereof, the drawer and the tank can be locked and unlocked automatically, a user can operate the drawer assembly conveniently, and the drawer can still be unlocked in case of outages or failures of the electronic control lock mechanism.

The invention provides a refrigerator and a drawer assembly thereof. The drawer assembly for the refrigerator comprises a box provided with a forward opening, a drawer arranged in the box in a front-back push-pull manner and provided with a front end plate used for sealing the forward opening, and a transmission cable assembly. The transmission cable assembly comprises a wiring rod and a spiral spring cable, wherein the front end of the wiring rod is fixedly connected to the rear surface of the front end plate and arranged in the front-back direction, the spiral spring cable is arranged on the wiring rod in a sleeving manner, the end portion of the spiral spring cable is fixedly connected to the front end plate so that electric power or signals can be transmitted to a power utilization component on the front end plate, and the spiral spring cable is arranged to be subjected to elastic and telescopic deformation along with front-back movement of the front end plate.

The invention provides a refrigerating and freezing device with an air-regulating fresh-keeping function. The device includes: a box, wherein the inner portion of the box defines a storage space and an enclosed air-regulating fresh-keeping subspace is formed in the storage space; an air-regulating fresh-keeping system, which includes an air-regulating membrane assembly and an aspirator pump, wherein the aspirator pump is configured to make the gas in the air-regulating fresh-keeping subspace permeate through the air-regulating membrane assembly, so that a gas atmosphere that is favorable for food preservation is formed in the air-regulating fresh-keeping subspace of the storage space; a refrigeration system, which is configured to supply cold energy to the air-regulating fresh-keeping subspace; a man-machine interactive system, which is configured to obtain an external operation and determine an air-regulating fresh-keeping index and a temperature index of the air-regulating fresh-keeping subspace according to the external operation; a controller, which is connected with the man-machine interactive system and configured to control the air-regulating fresh-keeping system and the refrigeration system according to the air-regulating fresh-keeping index and the temperature index. Therefore, the device can obtain external settings by the adoption of the friendly man-machine interactive system, and the corresponding air-regulating fresh-keeping control and refrigeration control are carried out.

The invention provides a refrigerator. The refrigerator comprises a box body, a gas adjusting membrane assembly and a gas sucking pump assembly. A storing space and a compressor cabin are defined inside the box body. A storing container is arranged in the storing space, and a refreshment space is defined inside the storing container. The gas adjusting membrane assembly is arranged in the way that oxygen in airflow of a surrounding space of the gas adjusting membrane assembly can more penetrate through a gas adjusting membrane to enter an oxygen-enriched gas collecting cavity relative to nitrogen in the airflow. The inlet end of the gas sucking pump assembly communicates with the oxygen-enriched gas collecting cavity in a controlled mode through a pipeline and a pipeline switching mechanism, so that gas in the oxygen-enriched gas collecting cavity is pumped to the outside of the refreshment space, and the actual nitrogen content in the refreshment space is within the range of 81% to 98%. According to the refrigerator disclosed by the invention, the actual nitrogen content in the refreshment space is within a proper range, and aerobic respiration strength of a food material can be effectively lowered; and meanwhile, a basic respiration effect is guaranteed, anaerobic respiration of the food material is avoided, and therefore the storage effect of the food material is improved and the refreshing time of the food material is prolonged.

The invention relates to a gas suction pump assembly and a cold storage and freezing device. The gas suction pump assembly comprises an installing box and a gas suction pump; a containing space is defined in the installing box; at least part of the box wall of the installing box is made from a micro-porous silencing plate; the surface of the micro-porous silencing plate is provided with a plurality of silencing through holes; the gas suction pump is arranged in the installing box; and the micro-porous silencing plate is arranged to absorb noise generated by the gas suction pump when the gas suction pump runs. By means of the micro-porous silencing plate, the gas suction pump assembly reduces outward spreading of the noise when the gas suction pump runs.

The invention discloses a preparation method of a selenium and zinc doped silicon dioxide composite sol. Different advantages of silicon, selenium and zinc are integrated effectively by doping selenium and zinc in the silicon dioxide composite sol, meanwhile, the addition of the zinc element provides nutrients for a crop, and the photosynthesis, respiration, nitrogen metabolism, hormone synthesisand growth of the crop are guaranteed. The invention further discloses the selenium and zinc doped silicon dioxide composite sol, and an effect of the selenium and zinc doped silicon dioxide compositesol in reducing the content of heavy metals in the crop is better than that of a soil application fertilizer, the absorption of the heavy metals such as cadmium, arsenic and lead in the crop is effectively blocked, the absorption and the enrichment of the heavy metals such as cadmium, arsenic and lead in the crop are greatly reduced, the transfer of the heavy metals such as cadmium and the like to an edible part of the crop is inhibited, and the harm to human bodies is reduced. In addition, a product of the selenium and zinc doped silicon dioxide composite sol can be applied to the productionof selenium and zinc-rich high-quality high-grade rice, the resistance of the rice to the heavy metals is improved by increasing the nutrients of the rice, the absorption and the accumulation of theheavy metals in the rice are reduced, and the selenium enrichment level of the rice is improved.

The invention discloses an electric cooking utensil and a control method and a control device for a breathing lamp of thereof. The control method for the breathing lamp in the electric cooking utensil comprises the steps of obtaining cooking parameters of the electric cooking utensil according to a preset period; determining the breathing frequency of the breathing lamp according to the cooking parameters; and controlling the breathing lamp according to the breathing frequency. Through controlling of variable-frequency display of the breathing lamp, dynamic changes of working parameters of the electric cooking utensil can be visually prompted, and better reminding and warning effects are achieved.

The invention relates to a refrigerator and a storage container for the refrigerator. The storage container comprises a sealing ring arranged at the front end of a cylinder body, the sealing ring comprises a ring-shaped connecting wall, a mounting part arranged on one side of the connecting wall and a propping part arranged on the other side of the connecting wall, the mounting part is inserted into the cylinder body or a drawer, and the propping part props against the drawer or the cylinder body; the sealing ring is configured to allow the propping part to deviate from the drawer or the cylinder body to form a gap under the action of the difference of an internal pressure and an external pressure of the cylinder body, so that air in the cylinder body flows to the outside of the cylinder body from the gap, or air at the outside of the cylinder body flows into the cylinder body through the gap. In addition, the invention further provides a refrigerator with the storage container. The balance of the internal pressure and the external pressure of the storage container is kept as much as possible, so that the drawer can be opened conveniently.

The invention provides a refrigerating and freezing device and a preservation control method thereof. The refrigerating and freezing device comprises a box, an air conditioning film component and a sucking pump, wherein a storage space is limited in the box; an airtight preservation sub-space is arranged in the storage space, and the sucking pump is arranged for enabling air in the preservation sub-space in the storage space to permeate through the air conditioning film component so as to form an atmosphere beneficial to food preservation in the preservation sub-space in the storage space. The preservation control method comprises the following steps: detecting the variety of food placed in the preservation sub-space; confirming a corresponding preservation running mode according to the variety of the food; setting the preservation running modes corresponding to various foods in the refrigerating and freezing device in advance, setting a starting / stopping period of the sucking pump in advance for each preservation running mode, and guaranteeing that the atmosphere in the preservation sub-space meets the refrigeration condition of the food placed in the preservation sub-space by the starting / stopping period; and driving the sucking pump to run according to the confirmed starting / stopping period. The preservation control method can meet the requirement for refrigeration of different foods.

The invention provides an air-cooled refrigerator which comprises a refrigerator body, a water discharge pipeline, a controlled atmosphere membrane component and an air extracting pump, wherein a storing space and a cooling space are formed in the refrigerator body; a storage container is arranged in the storing space; a controlled atmosphere fresh-keeping space is formed in the storage container; the water discharge pipeline is mounted on the refrigerator body, communicated with the cooling space and used for discharging water dropped down from an evaporator out of the cooling space; the controlled atmosphere membrane component is configured to enable more oxygen, relative to nitrogen, in the air flow of the around space permeates a controlled atmosphere membrane to enter an oxygen-enriched gas collecting cavity; the air extracting pump is used for extracting gas permeating the oxygen-enriched gas collecting cavity to be discharged out of the storage container through an air extracting pipeline and an air exhaust pipeline; the air exhaust pipeline is configured to enable gas permeating the oxygen-enriched gas collecting cavity to carry out heat exchange with the water discharge pipeline directly or indirectly after flowing out of the air extracting pump. According to the air-cooled refrigerator, the energy of gas discharged through the air extracting pump is utilized to dissolve residual ice at the inlet of the water discharge pipeline due to that the temperature of the gas is higher than that at the inlet of the water discharge pipeline, so that the water discharge pipeline is prevented from being blocked, and the energy is fully utilized.

The invention provides a refrigerating and freezing device. The refrigerating and freezing device comprises a box, a plurality of first airtight assemblies, an air extracting pump and one or more second airtight assemblies, wherein a storage space is defined in the box; the first airtight assemblies are arranged in the storage space; a refreshment subspace is defined in each first airtight assembly; each first airtight assembly is provided with an oxygen-enrichment membrane assembly; the space around each oxygen-enrichment membrane assembly communicates with the corresponding refreshment subspace; an oxygen-enrichment gas collection cavity is formed in each oxygen-enrichment membrane assembly; the air inlet end of the air extracting pump communicates with the oxygen-enrichment gas collection cavities of the first airtight assemblies through air extracting pipes correspondingly; the air extracting pump is used for extracting gas in the oxygen-enrichment gas collection cavities out, so that the oxygen concentration of the refreshment subspaces is reduced; the second airtight assemblies are also arranged in the storage space; a live-keeping subspace is defined in each second airtight assembly; the live-keeping subspaces communicate with the air outlet end of the air extracting pump through exhaust pipes correspondingly so as to receive gas from the oxygen-enrichment gas collection cavities, so that an air atmosphere with the oxygen concentration higher than 70% in favor of keeping fresh food fresh is formed.

The invention belongs to the field of fish transportation devices and particularly relates to a waterless keep-alive transportation pad for the fish. The transportation pad is characterized by comprising a pad body and a frame fixedly connected with the edge of the pad body; one end of the frame is fixedly connected with a buffer cushion; and the two symmetrical sides on the frame are fixedly connected with elastic bands. The waterless keep-alive transportation pad for the fish has the beneficial effects that a sponge net adopting the above structure is used as a cushion body; and a sponge pad is used as a waterless keep-alive transportation pad for fishes of the buffer cushion, therefore, the damage on the fish bodies is reduced, and the normal breathing action of the fish bodies is guaranteed, the keep-alive time, survival rate and transportation volume and the like are improved, and the transportation cost is reduced.

The invention relates to an air extracting pump assembly and a refrigerating and freezing device. The air extracting pump assembly comprises a sealing box where a sealing space is defined, and an air extracting pump arranged in the sealing box. The sealing box comprises a lower box body with the upper side opened, and an upper box body with the lower side opened. A sealing cover of the sealing box is buckled on the upper side of the lower box body so that the sealing space of the sealing box can be defined by the sealing cover and the lower box body together. The rear end of the upper box body is hinged to the rear end of the lower box body. The front end of the upper box body is fastened at the front end of the lower box body in a thread connection manner. By means of the air extracting pump assembly, outward propagation of the noise of the air extracting pump can be reduced, and the air extracting pump is convenient to disassemble and assemble.

The invention relates to a refrigerator and a storage container for the refrigerator. The storage container comprises an air pressure adjusting valve installed on a barrel, one end of the air pressure adjusting valve communicates with the interior space of the barrel, and the other end of the air pressure adjusting valve communicates with the exterior space of the barrel. The air pressure adjusting valve is arranged to enable the interior space of the barrel to communicate with the exterior space of the barrel through the air pressure adjusting valve under the action of the pressure difference between the interior space and the exterior space of the barrel, so that air in the interior space of the barrel flows out to the exterior space of the barrel through the air pressure adjusting valve, or air in the exterior space of the barrel flows into the interior space of the barrel through the air pressure adjusting valve. In addition, the invention provides the refrigerator provided with the storage container. According to the refrigerator and the storage container for the refrigerator, the balance between the internal pressure and the external pressure of the storage container is kept as much as possible, so that a drawer is convenient to open.

The invention relates to a refrigerator and a storage container for the refrigerator. The storage container comprises an oxygen-enriching membrane assembly and an airflow disturbance device, wherein the oxygen-enriching membrane assembly is installed to a cylinder, peripheral space of the oxygen-enriching membrane assembly is communicated with gas-adjusting freshness-keeping space, the oxygen-enriching membrane assembly comprises at least one oxygen-enriching membrane and an oxygen-enriching gas collecting cavity, and is configured in the mode that more pieces of oxygen in airflow of the peripheral space of the oxygen-enriching membrane assembly penetrate through the oxygen-enriching membranes to enter the oxygen-enriching gas collecting cavity relative to nitrogen in the airflow of the peripheral space of the oxygen-enriching membrane assembly, and an installing hole penetrating through the oxygen-enriching membrane assembly is formed in the oxygen-enriching membrane assembly; the airflow disturbance device is arranged in the installing hole, and is configured in the mode that air flowing of the peripheral space of the oxygen-enriching membrane assembly is promoted. In addition, the invention provides the refrigerator with the storage container. By means of the refrigerator and the storage container for the refrigerator, the storage container can obtain a gas atmosphere which is rich in nitrogen, poor in oxygen and beneficial to keep freshness of food, airflow disturbances in the storage container can be quickened, and the oxygen discharging rate in storage space is increased.

The invention discloses an efficient nutrient solution for liquid culture of lettuce and a preparation method of the efficient nutrient solution. The efficient nutrient solution is prepared from the following raw materials in parts by weight: an alga mixed solution, potassium ferrate, aluminum sulfate, EDTA (ethylenediaminetetraacetic acid) ferric sodium salt, chitosan oligosaccharide, monopotassium phosphate, magnesium sulfate, sodium hydrogen sulfite, ammonium molybdate, ferrous sulfate, polyaspartic acid, citric acid and a proper amount of water, wherein the solution is high in fluidity and can provide sufficient oxygen for water and keep the breathing action of roots; meanwhile, the nutrient solution belongs to colloid with high adhesion and is easily adsorbed onto the lettuce roots to form envelopes, and intermediates are established between the nutrient elements and the roots, accordingly, enrichment of elements nearby the roots is promoted, the problem that absorption of inorganic mineral elements is blocked by flowing water is solved, the yield is effectively increased, and the quality is effectively improved.

The invention provides a refrigerating and freezing device. The refrigerating and freezing device comprises a tank body, an oxygen-enrichment membrane assembly and an air extractor, wherein a first storage space is defined in the tank body and internally provided with a storage container; the storage container is internally provided with a modified atmosphere packaging space; the oxygen-enrichment membrane assembly is provided with at least one oxygen-enrichment membrane and an oxygen-enrichment gas collecting cavity; the space around the oxygen-enrichment membrane assembly communicates with the modified atmosphere packaging space and is arranged in the mode that more oxygen in airflow in the space around the oxygen-enrichment membrane assembly penetrates through the oxygen-enrichment membranes to enter the oxygen-enrichment gas collecting cavity than nitrogen in the airflow in the space around the oxygen-enrichment membrane assembly; and the air extractor communicates with the oxygen-enrichment gas collecting cavity through a pipeline so that the gas entering the oxygen-enrichment gas collecting cavity can be extracted and exhausted out of the storage container. The refrigerating and freezing device is good in preservative effect, the requirements for rigidity and strength of the storage container and the like are low, the realizing requirement is low, and the cost is low; and the refrigerating and freezing device is small in size, low in noise and quite suitable for households and individuals.

The invention relates to a preparation method of a crop drought resistant agent, and belongs to the technical field of crop production. According to the method, firstly, traditional Chinese medicines such as Chinese honeylocust fruits and radix angelicae sinensis are crushed and mixed with diatomite, rice washing water and the like for fermentation; after the filtering, filter slag is dried and carbonized, and is used as a drought resistant agent carrier; filter liquid is mixed with filter liquid of mixed fermentation products of fish bone, pig bone and the like; active ingredients are loaded onto the drought resistant agent carrier; auxiliary agents such as sodium alginate are used for assistance; after the concentration, the crop drought resistant agent is prepared. Active ingredients in various traditional Chinese herbal medicine are sufficiently utilized to be matched with phosphoric ingredients in fermentation products of the fish bone, the pig bone and crab shell; the crop root growth and development are promoted; the polyporous structures of traditional Chinese medicine slag and diatomite carbonization products are utilized; air required by the root breathing effect of crops can be ensured; in addition, residue inorganic matters in the traditional Chinese medicine slag can be slowly released, so that the crops have a developed root system structure; the drought resistance of the crops can be improved, and the crops can still maintain the normal growth and development under the drought condition; the crop yield is improved.

The invention provides a refrigerating and freezing device, which comprises a box body, an air control film assembly and an air extraction device, wherein a storage space is limited in the box body; a drawer assembly is arranged in the storage space; in addition, the drawer assembly is provided with a tube body, a drawer and a drawer box space; the air control film assembly is arranged in the drawer; and the peripheral space of the air control film assembly communicates with the drawer box; the air control film assembly is provided with at least one air control film and one oxygen-rich gas collecting cavity, and is configured into a state that much oxygen in the air flow in the peripheral space of the air control film assembly enters the oxygen-rich gas collecting cavity through the air control film relative to nitrogen gas in the air flow in the peripheral space of the air control film assembly; the air extraction device communicates with the oxygen-rich gas collecting cavity through a pipeline so as to exhaust the gas passing through the oxygen-rich gas collecting cavity out of the drawer assembly. The refrigerating and freezing device has the advantages that the fresh keeping effect is good; the requirements on the rigidity and the intensity of the box body are low; the implemention requirement is low; the cost is also lower; in addition, the size is small; the noise is low; the refrigerating and freezing device is particularly suitable for families and individuals.