Refrigerator

Abstract

The present disclosure provides a refrigerator including a vacuum sealing device disposed at an outer side of a door. The vacuum sealing device includes a lower support, an upper support and a vacuumization assembly. The upper support moves close to or away from the lower support under the drive of a driving device; after the upper support moves at a first speed until a sealing ring of the upper support is in contact with a sealing ring of the lower support, the upper support moves at a second speed toward the lower support until the sealing ring has a set deformation amount, and a first opening cavity and a second opening cavity are butt-joined to sealingly form a vacuumization region; the first speed is greater than the second speed; the vacuumization assembly is in communication with the vacuumization region through a pipe to perform vacuumization or depressurization for the vacuumization region.

1 . A refrigerator, comprising a vacuum sealing device disposed at an outer side of a door, wherein the vacuum sealing device comprises:
 a lower support, wherein an upper side of the lower support are provided with a first opening cavity and a sealing ring surrounding the first opening cavity;   an upper support, wherein a lower side of the upper support is provided with a second opening cavity and a sealing ring surrounding the second opening cavity;   a driving device including a motor and a transmission mechanism, wherein the upper support moves close to or away from the lower support under the drive of the driving device, the upper support moves at a second speed until the sealing ring has a preset deformation amount after the upper support moves at a first speed until the sealing ring of the upper support is in contact with the sealing ring of the lower support, the first opening cavity and the second opening cavity are butt-joined to sealingly form a vacuumization region, and the first speed is greater than the second speed;   a vacuumization assembly, wherein the vacuumization assembly is in communication with the vacuumization region through a pipe to perform vacuumization or depressurization for the vacuumization region.   
     
     
         2 . The refrigerator according to  claim 1 , wherein the vacuum sealing device further comprises a sealing zone comprising a heating wire at a lower side of the upper support and an insulation cushion at an upper side of the lower support; when the pressure of the vacuumization region satisfies a preset condition, the heating wire performs hot melting plastic sealing for a storage bag inserted into the sealing zone. 
     
     
         3 . The refrigerator according to  claim 1 , wherein the vacuumization assembly comprises a vacuum pump and a pressure detection device for detecting a pressure of the vacuumization region; after the upper support and the lower support are butt-joined, the vacuum pump is started; when a pressure value detected by the pressure detection device is smaller than a first preset value, the vacuum pump is shut down. 
     
     
         4 . The refrigerator according to  claim 3 , wherein the vacuumization assembly further comprises a pressure relief device in communication with the vacuumization region through a pipe; after the heating wire works for a first preset time, the pressure relief device is used to perform depressurization for the vacuumization region, and after the pressure relief device completes depressurizing for a second preset time, the upper support moves upward at a third speed under the drive of the driving device until the upper support restores to an initial position; wherein the third speed is greater than the second speed. 
     
     
         5 . The refrigerator according to  claim 1 , wherein the driving device comprises a motor and a transmission mechanism, the transmission mechanism is used to convert a rotational movement of the motor into a rectilinear movement, and an output end of the transmission mechanism is connected with the upper support; the transmission mechanism comprises a gear and rack transmission mechanism, a pin hole is disposed at a lower side of an output rack of the gear and rack transmission mechanism, the upper support and the output rack are connected by a pin shaft inserted through the pin hole, and the pin hole is an elongated hole extending longitudinally. 
     
     
         6 . The refrigerator according to  claim 5 , wherein the gear and rack transmission mechanism comprises a first gear fixedly connected to an output shaft of the motor, a second gear meshed with the first gear, a third gear fixedly connected to the second gear, and the output rack meshed with the third gear. 
     
     
         7 . The refrigerator according to  claim 6 , wherein a connection plate is disposed between the upper support and the driving device, the connection plate is thread-connected with the upper support, a guide groove is formed on the connection plate, a lower end of the output rack is inserted into the guide groove, and the pin shaft is inserted through the pin holes of the guide groove and the output rack. 
     
     
         8 . The refrigerator according to  claim 7 , wherein when the pin shaft is at the lowest end of the pin hole, there is a clearance between a lower end surface of the output rack and a groove bottom of the guide groove, and an elastomer is disposed in the clearance. 
     
     
         9 . The refrigerator according to  claim 8 , wherein two driving devices are symmetrically disposed at both sides of the upper support, one connection plate is disposed, and two guide grooves are disposed on the connection plate; and two output racks are inserted into the guide grooves respectively. 
     
     
         10 . The refrigerator according to  claim 1 , wherein the driving device and the vacuumization assembly are mounted on one mounting base, a mounting cavity recessed inwardly is disposed on a door housing, and the mounting base and the upper support are mounted into the mounting cavity. 
     
     
         11 . A refrigerator, comprising a storage compartment and a door opening or closing the storage compartment, wherein a vacuum sealing device is disposed on the door and comprises:
 an upper support and a lower support; wherein opening cavities are disposed on mutually-opposed surfaces of the upper support and/or the lower support; sealing rings surrounding the opening cavities of the upper support and/or the lower support are disposed; the upper support moves close to or away from the lower support under the drive of a driving device; when the upper support moves close to the lower support until the upper support and the lower support are butt-joined, the opening cavities sealingly form a vacuumization region by sealing rings;   a vacuumization assembly, wherein the vacuumization assembly comprises a vacuum pump in communication with the vacuumization region through a pipe; a pressure detection device and a pressure relief device are further disposed on the pipe, the pressure detection device, the pressure relief device and the vacuum pump are in electrical connection with a controller respectively, the pressure detection device detects a pressure of the vacuumization region after the vacuum pump is started, and when the controller determines the vacuumization region is abnormal according to a detection signal of the pressure detection device, the controller controls the vacuum pump to stop and starts the pressure relief device to perform depressurization for the vacuumization region.   
     
     
         12 . The refrigerator according to  claim 11 , wherein the controller is configured to determine that the vacuumization is abnormal when a pressure value of the vacuumization region reaches a first pressure value and the change of the pressure value is smaller than a second pressure value within a preset time, wherein the first pressure value is greater than the second pressure value. 
     
     
         13 . The refrigerator according to  claim 12 , wherein the controller is configured to control the vacuum pump to stop when it is determined that the pressure value of the vacuumization region reaches a third pressure value or a vacuumization time reaches a preset vacuumization time, wherein the third pressure value is greater than the first pressure value. 
     
     
         14 . The refrigerator according to  claim 11 , wherein the lower support is detachably connected to the door and the vacuumization region is in communication with the upper support through a pipe. 
     
     
         15 . The refrigerator according to  claim 11 , wherein the vacuum sealing device further comprises a sealing zone comprising a heating wire at a lower side of the upper support and an insulation cushion at an upper side of the lower support; when vacuumization is completed in the vacuumization region, the heating wire is used to perform hot melting plastic sealing for a storage bag inserted into the sealing zone. 
     
     
         16 . The refrigerator according to  claim 11 , wherein the driving device comprises a motor and a transmission mechanism used to convert a rotational movement of the motor into a rectilinear movement, and an output end of the transmission mechanism is connected with the upper support. 
     
     
         17 . The refrigerator according to  claim 16 , wherein after the upper support moves at a first speed under the drive of the driving device until the sealing ring of the upper support is in contact with the sealing ring of the lower support, the upper support moves toward the lower support at a second speed until the sealing ring has a preset deformation amount, wherein the first speed is greater than the second speed. 
     
     
         18 . The refrigerator according to  claim 17 , wherein after the pressure relief device works for a set time, the upper support moves upward at a third speed under the drive of the driving device until the upper support restores to an initial position, wherein the third speed is greater than the second speed. 
     
     
         19 . The refrigerator according to  claim 11 , wherein the driving device and the vacuumization assembly are mounted in one mounting base, a mounting cavity recessed inwardly is formed on a door housing, and the mounting base and the upper support are mounted into the mounting cavity. 
     
     
         20 . The refrigerator according to  claim 19 , wherein three cavities are disposed at a side of the mounting base, comprising a vacuum pump mounting cavity at a middle position, and driving device mounting cavities at left and right sides; the side of the mounting base having the cavities faces the door housing and fixed on the door housing through a screw.