11results about How to "Good fresh-keeping effect" patented technology

This invention relates to the field of food preservation technology and discloses a liquid preservative for preserving fresh walnut kernels. The preservative comprises a natural preservative, a solubilizing and stabilizing agent, and a solvent. This liquid preservative uses natural phloretin as the preservative component, combined with Tween 80 as a solubilizing and stabilizing agent and ethanol as a solvent. This effectively solves the problems of poor water and oil solubility and inadequate stability of phloretin, allowing it to be stably dispersed in the preservative system and fully exert its antioxidant and antimicrobial effects. Furthermore, the preparation method is simple and easy to implement, and the production process is safe and controllable. It is convenient to use; the preservation of fresh walnut kernels can be achieved through dilution and soaking. The diluted solution can be reused, reducing usage costs. Simultaneously, it can inhibit bacterial growth during the storage of fresh walnut kernels, delay oxidative deterioration, maintain their good appearance and quality, extend shelf life, and meet the market demand for high-quality fresh walnut kernels.

This utility model discloses an adjustable fruit and vegetable packaging box, relating to the field of fruit and vegetable packaging box storage technology. It includes a fruit and vegetable packaging box body, a lid, ventilation holes, and a classification and limiting partition. The classification and limiting partition facilitates quick and easy adjustment of the fruit and vegetable box's storage capacity and classifies and limits the placement of fruits and vegetables, improving space utilization. It also facilitates convenient humidity control and further preservation within the box's inner storage area, preventing damage to the fruits and vegetables. The design is convenient to operate, simple in structure, and low in cost.

Transportation fresh-keeping device, including folding support mechanism and fresh-keeping bag.The folding support mechanism includes support column, both ends of which are provided with fixed frame.The fixed frame and support column are assembled to form containing space, and the fresh-keeping bag is arranged in the containing space.The fixed frame is provided with fixed assembly seat on the front surface facing the fresh-keeping bag, and the fresh-keeping bag is provided with fixed assembly part, which is assembled and fixed with the fixed assembly seat.The fixed frame is provided with forklift groove on the back surface away from the fresh-keeping bag.Compared with the prior art, the present application has the following beneficial effects: the fish is preserved by the fresh-keeping bag, and the flowing liquid can be automatically discharged, the fresh-keeping effect is good, and at the same time, the folding support mechanism is used to contain and protect the fresh-keeping bag, the overall structure is light and firm, can be folded and stored, and the occupied space of the device is greatly reduced.The device can be combined, spliced and stacked, the collision between them during stacking is prevented, and the damage rate of the device during transportation is reduced.

The utility model relates to the technical field of article preservation, in particular to a refrigerator preservation device and a refrigerator. The refrigerator fresh-keeping device comprises a fresh-keeping cabin, a nitrogen making module, a vacuum pump, a first valve and a second valve, the fresh-keeping cabin is provided with an air inlet and an air outlet, the nitrogen making module is provided with a feeding port, a nitrogen outlet, a first oxygen discharging port and a second oxygen discharging port, and a three-way connecting pipe is provided with a first port, a second port and a third port; the nitrogen outlet is communicated with the gas inlet through a first pipeline; the second oxygen outlet is communicated with the first opening through a second pipeline; the second opening is communicated with the air outlet through a third pipeline; the vacuum pump is communicated with the third opening, the first valve is arranged on the second pipeline, and the second valve is arranged on the third pipeline; and one of the first valve and the second valve is opened. By arranging the vacuum pump connected with the nitrogen generation module and the fresh-keeping cabin, oxygen accumulated in the nitrogen generation module is fully discharged, and the fresh-keeping cabin can be vacuumized before and after nitrogen filling, so that the nitrogen utilization rate is high, and the fresh-keeping effect is good.

This utility model relates to the field of quick-freezing and preservation technology, specifically an immersion-type ultra-low temperature quick-freezing device using a recyclable safe liquid cooling fluid. It includes a housing and a foldable shelf located on the outside of the housing. The interior of the housing is divided into upper and lower sections by a partition. A freezing chamber is located in the upper section, and a refrigeration system is located in the lower section. A touchscreen operation panel is located on the upper right side of the outer wall of the housing. A sealing cover hinged to the housing is located above the freezing chamber. A stainless steel material frame is located inside the freezing chamber, and a lifting mechanism is located at the bottom of the material frame. This quick-freezing device employs immersion-type ultra-low temperature liquid quick-freezing entropy reduction technology, uses a recyclable cooling fluid, shortens freezing time, and also has the advantages of low energy consumption, low noise, and suitability for various indoor environments and climates.

The utility model discloses an automatic vegetable packaging machine which comprises a machine frame. The feeding frame is movably arranged on one side of the rack; the photoelectric detection device is arranged on one side of the feeding frame; a thin film discharging mechanism is arranged at the bottom of the rack; the bag making device is arranged on one side of the feeding frame and located above the thin film discharging mechanism; the middle sealing mechanism is arranged on one side of the machine frame and used for heating and pressing two overlapped film edges after a packaging bag is formed, and the end sealing mechanism is arranged at the tail end of the machine frame and used for heating, pressing and cutting off the end of the packaging bag. Compared with the prior art, the automatic vegetable packaging machine has the advantages that the functions of automatic vegetable feeding, length detection, packaging, sealing, weighing, labeling and the like can be achieved, the automation degree, the production efficiency and the packaging quality of vegetable packaging are improved, and the increasing requirements for efficient packaging of scenes such as online vegetable selling and the like are met.

The temperature and humidity regulation and control device comprises a heat preservation box body and an electric control system, the left portion of the heat preservation box body penetrates through the heat preservation box body, a box door capable of being opened and closed is installed on the left portion of the heat preservation box body, an exhaust pipe penetrating up and down is fixed to the upper left portion of the heat preservation box body, and a three-way pipe is fixed to the upper right portion of the heat preservation box body; a first electric valve for controlling on-off is installed on a through opening in the upper portion of the three-way pipe, a second electric valve for controlling on-off is installed on a through opening in the left portion of the three-way pipe, and a draught fan is installed on a through opening in the bottom of the three-way pipe. Water drops condensed on the surfaces of the pears are separated and gathered through the supporting disc, discharged through the through holes in the wavy bottom and then collected by the water collecting groove, so that contamination of the water drops to other pears is greatly reduced, and infection and damage are reduced; the upper sensor assembly, the electric refrigerating device, the electric heating device and the lower sensor assembly which are arranged on the upper portion and the lower portion of the heat preservation box body respectively are matched with rotation of the draught fan so that the temperature and the humidity in the heat preservation box body can be more uniform.

The utility model relates to the technical field of household appliances, in particular to a refrigerator fresh-keeping device and a refrigerator. A refrigerator fresh-keeping device comprises a vacuum pump, a fresh-keeping cabin, a nitrogen making module, a first pipeline, a second pipeline and a first valve, the fresh-keeping cabin is provided with a gas inlet and a gas outlet, and the nitrogen making module is used for separating nitrogen from oxygen and provided with a feeding port, a nitrogen outlet and an oxygen discharging port; one end of the first pipeline is communicated with the nitrogen outlet, and the other end is communicated with the gas inlet; one end of the second pipeline is communicated with the air outlet, and the other end of the second pipeline is connected with the vacuum pump to vacuumize the fresh-keeping cabin through the vacuum pump; the first valve is arranged on the first pipeline and can respond to the pressure difference between the nitrogen making module and the fresh-keeping cabin to open / close the first pipeline. According to the refrigerator, the vacuum pump is arranged to vacuumize the fresh-keeping cabin, oxygen can be further reduced, meanwhile, the filled nitrogen is completely used for creating a high-nitrogen and low-oxygen environment in the refrigerator, and the utilization rate of the nitrogen is increased.

The application discloses a copper-doped active manganese catalyst, a preparation method thereof and application of the catalyst in fruit preservation, and relates to the field of fruit preservation. The preparation method of the copper-doped active manganese catalyst comprises the following steps: selecting a cheap manganese ore, stirring and dissolving the manganese ore in an ascorbic acid solution, filtering to obtain a low-valence manganese-containing filtrate; adding the low-valence manganese-containing filtrate into a potassium permanganate solution, stirring and reacting at 70-90 DEG C for 12 hours, and filtering to obtain a brown precipitate; preparing a copper sulfate solution with a pH of 4-6, adding the brown precipitate, and stirring and reacting for 12 hours. After the reaction, the mixture is cooled and filtered, and the powder is obtained after drying at 150-160 DEG C; the powder is shaped into particles to obtain the catalyst. Through the doping of copper elements, the catalytic activity of manganese dioxide is significantly enhanced, so that the catalyst can actively and efficiently remove various key factors causing fruit decay and aging; the catalyst is applied to fruit preservation at room temperature, has a long service life, does not directly contact the fruit, and is safe and healthy.

The utility model belongs to the technical field of vacuum pressure switches, and particularly relates to a vacuum pressure switch applied to a refrigerator. The air cover is fixedly installed below the switch base, a containing cavity is formed in the air cover and the switch base, and the diaphragm piece is located in the containing cavity and divides the containing cavity into an upper cavity and a lower cavity. The PCB and the on-off mechanism are located in the upper cavity, a connector is arranged on one side of the PCB, an elastic piece is arranged on the other side of the PCB, and the on-off mechanism is located on the elastic piece side; the jacking mechanism located in the lower cavity conducts jacking or retreating motion due to the change of the pressure intensity in the refrigerator negative pressure fresh-keeping chamber and drives the on-off mechanism to extrude or loosen the elastic piece. Compared with the prior art, the pressure control structure has the beneficial effects that the pressure control structure is modularly designed, so that the assembly and after-sales maintenance and replacement of a product are facilitated, and the production cost is reduced; the pressure change control is realized by the spring, the elastic sheet and the diaphragm sheet, the attenuation is smaller, the control precision of the product is improved, and the service life of the product is prolonged.

The utility model relates to the field of flower cultivation technology especially is a kind of fresh-keeping device for flower cultivation, including water storage tank, the front side fixedly connected with fixed block of water storage tank, the front side fixedly connected with placing rack of fixed block, the top of placing rack is provided with cultivation box, the top of fixed block is provided with bottom plate, the top of bottom plate is provided with spray head, the top fixedly connected with water pump of water storage tank.The utility model has the advantages of good fresh-keeping effect and adjustable spraying range, and in actual use process, the cooperation of water pump, inlet pipe, outlet pipe and spray head can effectively transport water in water storage tank to spray head and spray out, water the flowers in cultivation box, keep the freshness and humidity of flowers, so as to achieve the effect of long-term preservation, by the setting of first drive mechanism, the position of spray head is adjusted, so that spray head can be moved to different positions, and the flowers in each corner are watered.