Multi-temperature storage liquid nitrogen refrigerator and switching method

• Main Authors: YE JINGTAO, ZHENG JUAN
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2023
• Subjects: BLASTING; COLD ROOMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS; HEAT PUMP SYSTEMS; HEATING; ICE-BOXES; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; REFRIGERATION OR COOLING; REFRIGERATORS; WEAPONS

The invention discloses a multi-temperature storage liquid nitrogen refrigerator and a switching method, the multi-temperature storage liquid nitrogen refrigerator comprises a refrigerator main body, a thermal insulation plate is arranged in an inner cavity of the refrigerator main body, and the thermal insulation plate divides the inner cavity of the refrigerator main body into a first chamber and a second chamber; a refrigerant pipe is arranged in the refrigerator body, liquid nitrogen is introduced into the refrigerant pipe, the refrigerant pipe in the first cavity communicates with the refrigerant pipe in the second cavity through an electromagnetic three-way valve, and a refrigerant pipe is also arranged in the heat insulation plate and communicates with the electromagnetic three-way valve. The cold pipe is attached to the inner wall of the second cavity, the cold pipe is connected with an external compressor, and the cold pipe communicates with a heat pipe arranged at the position close to a heat dissip