Refrigerating and freezing device

Patent metadata

Field	Value
Publication number	US-10890369-B2
Application number	US-201716302089-A
Country	US
Kind code	B2
Filing date	Feb 23, 2017
Priority date	Jun 20, 2016
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

The present invention provides a refrigerating and freezing device. A first sealed space and a second sealed space are disposed in a storage space inside the refrigerating and freezing device. The refrigerating and freezing device is further provided with a nitrogen generation device, which comprises an adsorption device and an air compressor that supplies compressed air for the adsorption device. The adsorption device utilizes the compressed air to prepare nitrogen that is provided for the first sealed space and an oxygen-enriched gas that is provided for the second sealed space. The freshness preservation capability of the first sealed space is improved. The bioactivity of food in the second sealed space is guaranteed.

First claim

What is claimed is:

1. A refrigerating and freezing device, comprising:
a cabinet body in which a storage compartment is provided, a first sealed space and a second sealed space being formed in the storage compartment; and
a nitrogen generation device comprising an adsorption device and an air compressor, wherein the air compressor supplies compressed air for the adsorption device in a controlled manner, the adsorption device is communicated with the first sealed space or the second sealed space in a controlled manner, and the nitrogen generation device is configured to:
supply the compressed air for the adsorption device, communicate the adsorption device with the first sealed space so as to enable the adsorption device to prepare nitrogen and to provide the prepared nitrogen for the first sealed space; and
communicate the adsorption device with the second sealed space after stopping supplying the compressed air for the adsorption device so as to enable the adsorption device to desorb an oxygen-enriched gas and to provide the desorbed oxygen-enriched gas for the second sealed space,

wherein the adsorption device further comprises:
a first barrel in which a first adsorption room and a nitrogen room that are isolated from each other are provided, and the nitrogen room being communicated with the first sealed space; and
a second barrel in which a second adsorption room and an air room that are isolated from each other are provided, wherein:
the air compressor is communicated with the air room through an air inlet pipe so as to supply the compressed air for the air room in a controlled manner;
carbon molecular sieves are disposed in the first adsorption room and the second adsorption room; the air room alternately supplies the compressed air for the first adsorption room and the second adsorption room in a controlled manner; when one of the first adsorption room and the second adsorption room adsorbs the oxygen-enriched gas to prepare nitrogen, the other thereof desorbs the carbon molecular sieves which have finished adsorption; the adsorption room that prepares the nitrogen is communicated with the nitrogen room; and the adsorption room that performs desorption is communicated with the second sealed space.

2. The refrigerating and freezing device according to claim 1 , wherein the nitrogen generation device further comprises:
a gas path reversing valve provided with five gas delivery ports, a first gas delivery port being communicated with the first adsorption room, a second gas delivery port being communicated with the second adsorption room, a third gas delivery port being communicated with the air room, wherein the gas path reversing valve is further configured to that the third gas delivery port is alternately communicated with the first gas delivery port and the second gas delivery port; when the third gas delivery port is communicated with the first gas delivery port, a fourth gas delivery port is communicated with the second gas delivery port, the air room supplies the compressed air for the first adsorption room, and the oxygen-enriched gas desorbed by the second adsorption room is discharged through the fourth gas delivery port; and when the third gas delivery port is communicated with the second gas delivery port, a fifth gas delivery port is communicated with the first gas delivery port, the air room supplies the compressed air for the second adsorption room, and the oxygen-enriched gas desorbed by the first adsorption room is discharged through the fifth gas delivery port.

3. The refrigerating and freezing device according to claim 2 , wherein the nitrogen generation device further comprises:
a three-way pipe communicated with the fourth gas delivery port and the fifth gas delivery port and configured to merge the two gas delivery ports into an oxygen-enriched gas discharge port.

4. The refrigerating and freezing device according to claim 3 , wherein the nitrogen generation device further comprises:
a three-way solenoid valve provided with three vents, a first vent being communicated with the oxygen-enriched gas discharge port through an oxygen-enriched gas output pipe, a second vent being communicated with the second sealed space, and a third vent being communicated with outside air of the refrigerating and freezing device, wherein:
the first vent is selectively communicated with the second vent or the third vent, the oxygen-enriched gas is conveyed into the second sealed space when the first vent is communicated with the second vent, and the oxygen-enriched gas is discharged to the outside air when the first vent is communicated with the third vent.

5. The refrigerating and freezing device according to claim 1 , wherein the nitrogen generation device further comprises:
a connecting pipe communicated with the first adsorption room and the second adsorption room; and
a pressure equalizing valve connected in series with the connecting pipe and configured to unblock the connecting pipe when one of the first adsorption room and the second adsorption room stops adsorption and prepares to desorb, such that air pressures inside the first adsorption room and the second adsorption room are equalized.

6. The refrigerating and freezing device according to claim 1 , wherein the nitrogen generation device further comprises:
a first gas outlet pipe communicated between the first adsorption room and the nitrogen room;
a second gas outlet pipe communicated between the second adsorption room and the nitrogen room; and
two one-way valves respectively disposed on the first gas outlet pipe and the second gas outlet pipe and configured to allow a gas to unidirectionally flow toward the nitrogen room from the first adsorption room or the second adsorption room, such that the gas in the nitrogen room is prevented from backflow.

7. The refrigerating and freezing device according to claim 1 , wherein the nitrogen generation device further comprises:
an oil-water separator disposed on the air inlet pipe and configured to filter the air that enters the air room.

8. The refrigerating and freezing device according to claim 1 , wherein:
the first barrel and the second barrel are disposed in the refrigerating and freezing device side by side, and one end of the first adsorption room and one end of the second adsorption room are disposed in the same direction.

Assignees

• Qingdao Haier Joint Stock Co Ltd

Inventors

• Liu Haoquan
• Jiang Bo
• Wang Liyan
• Xin Ruowu

Classifications

• F25D2317/04

  Treating air flowing to refrigeration compartments · CPC title

• F25D17/045

  Air flow control arrangements · CPC title

• B01D2259/40035

  Equalization · CPC title

• C01B2210/0045

  Oxygen · CPC title

• B01D2258/06

  Polluted air · CPC title