Vacuum preservation device, refrigerator and control method of vacuum preservation device

Abstract

The invention provides a vacuum preservation device. The vacuum preservation device is provided with a vacuum preservation container, a vacuum pump and a pressure switch, wherein the vacuum pump is used for vacuumizing the vacuum preservation container; and the pressure switch is fixed on the vacuum pump and turns on and turns off the vacuum pump repeatedly to keep the pressure in the vacuum preservation container in a preset pressure range. The invention also provides a refrigerator provided with the vacuum preservation device. Furthermore, the invention provides a control method of the vacuum preservation device. The control method comprises the following steps of: selecting a vacuum preservation mode; starting to vacuumize; in the process of vacuumizing, turning off the vacuum pump by the pressure switch when the pressure in the vacuum preservation container is reduced to a first pressure value; and after the vacuum pump is turned off, feeding a startup signal back by the pressure switch to return to the step of vacuumizing and repeating the steps when the pressure in the vacuum preservation container is increased to a second pressure value. According to the vacuum preservation device, the refrigerator and the control method of the vacuum preservation device, the requirement on the extension of storage time under a low-oxygen vacuum environment of users is met, and the cost is reduced.

Description

technical field [0001] The invention relates to a vacuum preservation device, a refrigerator and a control method of the vacuum preservation device. Background technique [0002] Food stored in a low-temperature and low-oxygen environment can keep fresh for a longer period of time. As far as the current fresh-keeping technology is concerned, it is generally considered from the following four aspects: 1. Microbial treatment is to make the entire storage space as few as possible microbial bacteria that destroy the nutritional structure of food; The space maintains a low-temperature environment to slow down the activity of microorganisms; 3. Humidity treatment; 4. Gas treatment, so that the gas in the space that has a significant effect on microbial oxidation and respiration is reduced as much as possible, mainly oxygen. In the current fresh-keeping technology of refrigerators, oxygen is also closely related to the oxidation and respiration of food. [0003] Reducing the oxyg...

AI Technical Summary

Problems solved by technology

In this way, the requirements for the sealing performance and the sensing performance of the pressure sensor are very high. If the sealing performance is not good or the sensing performance of the pressure sensor is not stable or even fails, such vacuum preservation is out of the question, and the pressure The sensor is an electronic sensor, the cost is very high, and the stability is not easy to control. The existing technology is not yet fully mature for the research on the pressure sensor, and the failure rate is also very high.

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