10 results about "EVACUATED CONTAINER" patented technology

A system for evacuating and sealing containers filled with product, for example, food product, includes an enclosed, sealed housing wherein the pressure level and the atmospheric content can be controlled. A vacuum shroud is positioned in registry with a container entrance opening in the housing, the shroud connectible to a vacuum source and to a source of replaceable gas to replace the ambient air to be removed from the container. The shroud is advanceable to seal the container entrance opening and is retractable from the container entrance opening. A container transport system inserts the container through the housing entrance opening and into the shroud. Thereupon, a sealing system seals the housing from the ambient after the container has been inserted into the shroud. After the air in the container has been replaced with an inert gas and then the shroud retracted, a closure subsystem applies a cover to the evacuated container. Thereafter, an out feed subsystem removes the closed container from the housing while maintaining the atmospheric content and pressure level within the housing.

Seal for a lid for use of the container as a vacuum container comprising an edge forming a cavity for receiving a lid edge therein, such that, when the lid edge is enclosed by the seal, at least one fluid channel between the seal and the lid is provided for establishing a fluid connection between an interior of the container and an exterior of the container via the cavity, during use; - wherein the edge of the seal comprises an inwardly extending rim biased towards a downward position in which the rim, when the lid edge is enclosed by the seal, rests on the lid for closing off the fluid connection, and wherein the inwardly extending rim is adjustable to an upward position for opening the at least one fluid channel when a pressure difference between in the interior of the container and the exterior of the container exceeds a predefined threshold to allow extraction of air from the interior of the container for vacumising the container during use.

The invention discloses a gas leakage equivalent leakage rate measuring system which comprises a vacuum container, a first sample pipe and a second sample pipe, a leakage hole is formed in the first sample pipe, the second sample pipe is in a sealed state usually, and a differential pressure gauge is connected between the first sample pipe and the second sample pipe; at least part of the first sample pipe is arranged in the vacuum container so that the leak hole can be located in the vacuum container, and the vacuum container is connected with a vacuum pump. The invention further discloses a gas leakage equivalent leakage rate measuring method, and the gas medium leakage rate can be accurately measured. According to the gas leakage equivalent leakage rate measurement system and method provided by the invention, for a specific leakage point with an unknown leakage rate, under the condition that the gas leakage volume is difficult to measure, the effective gas leakage rate can be obtained by using the differential pressure gauge to measure the pressure change and combining the volume calculation, and the leakage rates of different gas media can be measured; therefore, an equivalent leakage rate table is formulated, and corresponding relation measurement verification of leakage conditions of different gas media is realized.

This application discloses a method for maintaining high vacuum under high-speed neutral particle flow field extraction, belonging to the field of low-Earth orbit space environment simulation technology. The method involves coarsely pumping the vacuum container to reduce the pressure below a first pressure value; activating the container's cryogenic pump and the transition section's cryogenic pump to reduce the pressure below a second pressure value, establishing a high-vacuum background environment; activating the gas-helium refrigeration system to cool the cryogenic cold plate, lowering its temperature below a first temperature threshold and its pressure below a third pressure value, forming high-pumping-rate vacuum maintenance conditions; allowing a neutral particle source to extract a high-speed neutral particle flow field through the transition section; and continuously evacuating the introduced gas molecules during the continuous extraction of the particle flow using the container's cryogenic pump, the transition section's cryogenic pump, and the cryogenic cold plate to maintain the pressure below a fourth pressure value. This application solves the technical problem of maintaining high vacuum in a container under high-speed neutral particle flow field extraction.

The invention discloses a rapid measurement platform and method for a low-temperature filter device, the platform comprises a first container, a second container, a cold guide plate, an electrical interface, a temperature control module and the like, and the method comprises the following steps: firstly testing the first total loss of a standard component; the low-temperature medium is discharged, a heating block is started to enable the cold guide plate to return to the normal temperature, and the standard part is taken out; fixing a to-be-tested device on the cold conduction plate, connecting an electrical interface, closing the vacuum container, vacuumizing to the preset vacuum degree, injecting a low-temperature medium into the second container, conducting heat and cooling through the cold conduction plate, and after a temperature sensor detects that the temperature of the cold conduction plate is reduced to a preset temperature and is stabilized for a preset time, starting the second container; and testing the second total loss and the standing-wave ratio of the standard component. According to the invention, the test platform comprising the vacuum container and the liquid cooling container is constructed, non-contact heat conduction and cooling of the device and the low-temperature liquid are realized by using the cold conduction plate, and meanwhile, the high efficiency and stability of temperature adjustment are ensured by matching with the temperature monitoring and rapid temperature returning component.

The application discloses a large-atmosphere multi-stage air supercharging system and method for a large ring mold device, and relates to the technical field of environmental testing. The supercharging system comprises a gas inlet device, a first condenser, a gas-water separator, a second condenser, a contact container, a liquid nitrogen separator, a pressure reducing valve, a supercharging valve and an environmental simulation vacuum container which are connected in sequence. Normal-temperature air is sequentially processed by the gas inlet device, the first condenser, the gas-water separator, the second condenser, the contact container, the liquid nitrogen separator and the pressure reducing valve, so that dry and clean air can be obtained, the dew point temperature is as low as the liquid nitrogen temperature range, and therefore, after the dry and clean air enters the inside of the environmental simulation vacuum container through the supercharging valve, no dew condensation phenomenon occurs, and asphyxiation is not caused, the use safety is ensured, the overall air volume is large, the supercharging is rapid, the liquid nitrogen consumption is small, and the power consumption is small.

The invention provides a maintenance method of a refrigerator, and particularly relates to a refrigerator with a superconducting magnet device of a vacuum container. When the refrigerator is maintained, after helium atmosphere is formed around the refrigerator, the gas mover is pulled out of the air cylinder, the temperature in the air cylinder is low at the moment, in order to prevent water vapor in air entering the air cylinder from being condensed, the heating rod is inserted into the air cylinder, the surface temperature of the air cylinder is increased, and at the moment, the air cannot be condensed even if the air enters the air cylinder. And when the surface temperature of the air cylinder rises to the specified preset temperature condition, the heating rod is pulled out, and after maintenance of the refrigerator is completed, the second air mover is inserted into the air cylinder.

The invention belongs to the technical field of high-temperature heat pipe heat transfer performance testing, and particularly relates to an environment-controllable high-temperature heat pipe performance testing device and method. According to the invention, the heat pipe performance test body is arranged in the vacuum container, and the environment control system realizes the comprehensive performance test of the high-temperature heat pipe in various environments such as vacuum, specific atmosphere, high and low temperature and the like by vacuumizing the vacuum container, filling inert gas or changing the temperature in the container; the cooling loop system is connected with the cooling assembly through a metal hose and provides a cold source for the condensation section of the heat pipe. The electric heating system is connected with the heat pipe performance testing body, and the measurement and control system is used for collecting and controlling signals and displaying, recording and processing data in real time. According to the invention, the actual operation environment of the heat pipe can be simulated, the comprehensive performance test of the high-temperature heat pipe in various controllable environments such as vacuum, specific atmosphere and high and low temperature can be realized, and the performance of the high-temperature heat pipe can be accurately evaluated.