Device and method for controlling vacuum degree of vacuum refreshing refrigerator

Abstract

The invention relates to the technical field of refrigerators, in particular to a device and a method for controlling the vacuum degree of a vacuum refreshing refrigerator, which comprises a vacuum refreshing box, a vacuum pump, a pressure switch and a master control board, wherein the vacuum pump is communicated with the vacuum refreshing box, a pressure detection end of the pressure switch is communicated with the vacuum refreshing box, a pressure signal output end of the pressure switch is connected with the master control board, and a control signal output end of the master control board,which controls the action of the vacuum pump according to a pressure signal of the pressure switch, is connected with a signal input end of the vacuum pump electrically. In the control method, the pressure switch is used for detecting the air pressure of the vacuum refreshing box and outputting the pressure signal according to the air pressure to control the action of the vacuum pump. In the invention, the pressure switch is added to control the vacuum degree inside the refreshing box to be kept in a certain range all the time, and the control range is adjustable; moreover, the pressure switch has the advantages of simple structure and low cost and is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of refrigerators in electrical equipment, in particular to a vacuum degree control device and a control method of a vacuum fresh-keeping refrigerator. Background technique [0002] The control method of the vacuum degree of the existing vacuum fresh-keeping refrigerator is: after the vacuum fresh-keeping box is closed, the vacuum pump pumps air to it, and when the pressure value in the vacuum fresh-keeping box reaches the set value, the vacuum pump stops. If the vacuum fresh-keeping box is not opened again After closing, the vacuum pump will never work again. The disadvantage of this control method is that the vacuum crisper cannot be completely sealed, and the pressure difference between the vacuum crisper and the outside world will decrease with time. If the customer does not open the vacuum crisper for a long time, the vacuum degree in the vacuum crisper will decrease. , the fresh-keeping effect is obvio...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a vacuum fresh-keeping refrigerator that can control the vacuum degree in the vacuum fresh-keeping box to solve the problem that the vacuum degree drops and affects the fresh-keeping effect due to the natural leakage of the vacuum fresh-keeping box that has not been opened for a long time. degree of control

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