CN113915916B

CN113915916B - Refrigerator

Info

Publication number: CN113915916B
Application number: CN202110295456.5A
Authority: CN
Inventors: 张升刚; 韩丽丽; 张月; 张守杰; 闫宝升; 孙启东
Original assignee: Hisense Refrigerator Co Ltd
Current assignee: Hisense Refrigerator Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2023-04-11
Anticipated expiration: 2041-03-19
Also published as: CN113915916A

Abstract

The invention provides a refrigerator, and belongs to the technical field of household appliances. The refrigerator comprises an inner container which is limited with a storage compartment; the air duct assembly is arranged at the rear end of the storage compartment, and a fan air inlet is formed in the rear wall of the air duct assembly; the shielding device is arranged at the air inlet of the fan and used for opening or closing the air inlet of the fan; wherein the shielding device comprises: an end cap having a forwardly extending support body; the driving assembly is arranged in the support body; the rotating cylinder is sleeved on the supporting body and is driven by the driving assembly to rotate; and the shielding cover is spirally connected with the rotary cylinder so as to convert the rotary motion of the rotary cylinder into the front and back movement of the shielding cover. The refrigerator has the advantages of small volume and no thinning of the foam layer.

Description

Refrigerator with a door

Technical Field

The invention relates to the technical field of household appliances, in particular to a refrigerator.

Background

In the related art, when the air-cooled refrigerator is heated and defrosted by an evaporator, hot air can directly enter a freezing chamber through a fan air inlet of an air duct because the air duct of the freezing chamber has no closing function, so that the temperature fluctuation of the freezing chamber is caused; in order to solve this problem, a shielding device installed at the air inlet of the fan has been further developed, which can close the air inlet of the fan when the refrigerator is heated for defrosting. However, the conventional shielding device has a large volume and occupies a space of the foaming layer.

Disclosure of Invention

The present invention solves at least one of the technical problems of the related art to some extent.

Therefore, the refrigerator provided by the disclosure has the advantages of small size and no reduction of a bubble layer because the shielding device adopts a layered design from inside to outside, so that the axial size of the shielding device is reduced.

According to the refrigerator provided by the disclosure, the shielding device runs stably and smoothly as the rotating cylinder is supported and rotated by the plurality of gears.

According to the refrigerator provided by the disclosure, the motor is embedded in the transmission mechanism, and the rotary cylinder is hidden in the shielding cover at the initial opening position, so that the axial size occupied by the shielding device is reduced, and the structure is more compact.

According to the refrigerator provided by the disclosure, the installation convenience is improved as the shielding device adopts layered fixing and sequential installation.

The refrigerator according to the present disclosure includes: a liner defining a storage compartment; the air duct assembly is arranged at the rear end of the storage compartment, and a fan air inlet is formed in the rear wall of the air duct assembly; the shielding device is arranged at the air inlet of the fan and used for opening or closing the air inlet of the fan; wherein, the shade device includes: an end cap having a forwardly extending support body; the driving assembly is arranged in the supporting body; the rotating cylinder is sleeved on the support body and is driven by the driving assembly to rotate; and a shield cover spirally connected with the rotary cylinder to convert the rotary motion of the rotary cylinder into the back-and-forth movement of the shield cover.

According to the embodiment of the refrigerator, the rear end of the periphery of the supporting body is provided with a plurality of supporting bulges for supporting the rear end of the rotary drum; the drive assembly includes: and the driving gear is arranged on the upper side of the front end of the supporting body and is meshed with the internal teeth of the rotating cylinder.

According to an embodiment of the refrigerator of the present disclosure, the shielding apparatus further includes: and the supporting gear and the driving gear are arranged at the front end of the supporting body at intervals and are meshed with the internal teeth of the rotating cylinder.

According to an embodiment of the refrigerator of the present disclosure, there is a gap between the rotary cylinder and the support protrusion in a radial direction.

According to the embodiment of the refrigerator of the present disclosure, the end cover includes a cover body connected to the rear end of the support body, the rear end surface of the rotary cylinder is provided with a plurality of first contact posts protruding backward, and the first contact posts are in contact with the cover body.

According to the embodiment of the refrigerator, the front end of the rotary cylinder is in an opening shape; the shading device further comprises: the stop plate is arranged at the front end of the rotary cylinder and can stop the rotary cylinder from moving forwards when the stop plate is abutted against the rotary cylinder; and the stopping shaft penetrates through the stopping plate and is connected with the supporting body, an outward convex stopping ring is arranged at the front end of the stopping shaft, and the stopping plate can be limited to move forwards when the stopping ring offsets against the stopping plate.

According to the embodiment of the refrigerator, the rear end face of the stop ring is provided with a second contact column protruding backwards; or/and the front end surface of the stop ring is provided with a third contact column protruding forwards.

According to an embodiment of the refrigerator of the present disclosure, the end cap includes a cap body connected to a rear end of the support body; the rear end of the shielding cover is not contacted with the cover body.

According to an embodiment of the refrigerator of the present disclosure, the shielding apparatus further includes: the guide rod is arranged on the end cover, and a heating wire is arranged in the guide rod; the shielding cover is arranged through the guide rod.

According to the embodiment of the refrigerator disclosed by the disclosure, the end surface of the supporting rotary cylinder on the supporting protrusion is an arc surface.

The refrigerator according to the present disclosure includes: an inner container defining a storage compartment; the air duct assembly is arranged at the rear end of the storage compartment, and a fan air inlet is formed in the rear wall of the air duct assembly; the shielding device is arranged at the air inlet of the fan and used for opening or closing the air inlet of the fan; wherein, the shade device includes: an end cap having a forwardly extending support body; a plurality of gears arranged at intervals along the circumferential direction at the front end of the support body; the rotating cylinder is sleeved on the support body and meshed with the gear; and a shield cover spirally connected with the rotary cylinder to convert the rotary motion of the rotary cylinder into a back-and-forth movement of the shield cover.

According to an embodiment of the refrigerator of the present disclosure, the gear includes: the driving gear is connected with an output shaft of the motor to drive the rotary drum to rotate; two supporting gears arranged at the front end of the supporting body at intervals with the driving gear and meshed with the rotating cylinder.

According to the embodiment of the refrigerator disclosed by the disclosure, the front end of the supporting body is provided with the installation shaft extending forwards, and the supporting gear is installed on the installation shaft.

According to an embodiment of the refrigerator of the present disclosure, the driving gear is located at an upper side of the supporting gear.

According to the embodiment of the refrigerator, the outer peripheral surface of the rotary cylinder is provided with the convex part which protrudes outwards, and the convex part is provided with the spiral groove which extends in a spiral shape; the inner peripheral surface of the shielding cover is provided with a spiral strip which extends in a spiral shape, and the spiral strip is matched with the spiral groove.

According to the embodiment of the refrigerator, the two protrusions are arranged at the front end of the rotary drum at 180 degrees.

According to an embodiment of the refrigerator of the present disclosure, the end cap and the shield cover are substantially in a triangular dart shape.

According to the embodiment of the refrigerator disclosed by the disclosure, a groove part which is recessed backwards is arranged on the rear wall of the inner container at the position corresponding to the air inlet of the fan, and the shielding device is installed in the groove part.

According to the embodiment of the refrigerator disclosed by the disclosure, the end cover is provided with a screw hole; the shielding cover is provided with an installation avoiding hole coaxial with the screw hole, and the installation avoiding hole can allow a screwdriver to pass through.

The refrigerator according to the present disclosure includes: an inner container defining a storage compartment; the air duct assembly is arranged at the rear end of the storage compartment, and a fan air inlet is formed in the rear wall of the air duct assembly; the shielding device is arranged at the air inlet of the fan and used for opening or closing the air inlet of the fan; wherein, the shade device includes: the end cover is provided with a support body extending forwards, and an accommodating cavity is formed in the support body; the motor is arranged in the accommodating cavity and used for providing driving force; the driving gear is connected with the motor and is positioned at the front end of the supporting body; the rotating cylinder is sleeved on the support body, and the inner circumferential surface of the rotating cylinder is provided with inner teeth meshed with the driving gear; the shielding cover is spirally connected with the rotary cylinder and covers the rotary cylinder when in an initial opening position; the shield cover is pushed by the rotary cylinder to move forward when being shifted to the closed position.

According to an embodiment of the refrigerator of the present disclosure, the shielding device further includes: and the guide rod penetrates through the end cover and the shielding cover from the rear side of the end cover.

According to the embodiment of the refrigerator disclosed by the disclosure, the rear end of the guide rod is provided with a support which is clamped with the end cover.

The refrigerator according to the present disclosure includes: an inner container defining a storage compartment; the air duct assembly is arranged at the rear end of the storage compartment, and a fan air inlet is formed in the rear wall of the air duct assembly; the shielding device is arranged at the air inlet of the fan and used for opening or closing the air inlet of the fan; wherein, the shade device includes: an end cap having a forwardly extending support body; the rotating cylinder is sleeved on the supporting body and can rotate relative to the supporting body; a shield cover spirally connected with the rotary drum to convert the rotary motion of the rotary drum into a forward and backward movement of the shield cover; and the guide rods are arranged at intervals along the circumferential direction, penetrate through the end cover and the shielding cover and are connected to the end cover so as to guide the shielding cover to move back and forth.

According to the embodiment of the refrigerator, the rear end of the guide rod is provided with a support which is clamped with the end cover, the end cover is provided with a plurality of first leg parts extending outwards, and the guide rod penetrates through the first leg parts; the end of the support is provided with a buckle for clamping the first supporting leg.

According to the embodiment of the refrigerator disclosed by the disclosure, the outer surface of the support does not protrude out of the outer surface of the first leg part.

According to an embodiment of the refrigerator of the present disclosure, the shielding device further includes: and the guide ring is connected to the front end of the guide rod, and the shielding cover moves between the guide ring and the end cover along the guide rod.

According to the embodiment of the refrigerator, the periphery of the guide rod is provided with a first clamping ring protruding outwards; the guide ring is provided with a guide hole penetrating through the guide rod, and a second clamping ring is arranged in the guide hole; the first snap ring passes through the second snap ring in an interference manner.

According to the embodiment of the refrigerator disclosed by the disclosure, the outer diameter of the first clamping ring is gradually increased from front to back, and the inner diameter of the second clamping ring is gradually increased from front to back.

According to the embodiment of the refrigerator disclosed by the disclosure, the guide ring is fixedly bonded with the guide rod.

Advantageous effects

According to the refrigerator, the driving device is arranged in the support body, and the spiral transmission mechanism consisting of the rotary cylinder and the shielding cover is sleeved outside the support body, so that the axial space occupied by the driving device and the transmission mechanism is reduced, the shielding device is compact in structure and small in size, and the space of a foaming layer of the refrigerator is not occupied.

According to the shielding device, the size is prevented from being increased by multi-stage gear transmission in a mode of directly meshing and transmitting the driving gear and the inner teeth, and the size of the shielding device is further reduced; the supporting gear is arranged to support the rotary cylinder, so that the stability of the rotary cylinder during rotation is ensured, and the shielding device runs stably and smoothly.

According to the rotary drum, the rotary drum is hidden in the shielding cover when the initial opening position is set, and the rotary drum is separated from the shielding cover in the front-back direction in the shielding closing process, so that the space occupied by the rotary drum is reduced.

According to the present disclosure, the rear end of the rotary drum is supported by the supporting protrusion by providing the supporting protrusion at the rear end of the supporting body, so that the contact area between the rotary drum and the supporting body is reduced as much as possible, and the possibility of frosting is reduced.

According to this disclosure, set up the internal tooth through the front end at rotatory section of thick bamboo for the front end of rotatory section of thick bamboo is supported by the internal tooth, and the rear end of rotatory section of thick bamboo is supported by the support arch and is supported and have the clearance between protruding and the rotatory section of thick bamboo, and under the natural condition, because the action of gravity, rotatory section of thick bamboo presents the state of high back low before, is favorable to the discharge of ponding in the rotatory section of thick bamboo, has avoided rotatory section of thick bamboo department frosting to freeze.

According to the disclosure, a first contact column is arranged at the rear end of the rotary cylinder, and the first contact column is in contact with the cover body; the front end surface and the rear end surface of the stop ring are provided with a third contact column in contact with the shielding cover and a second contact column in contact with the stop plate; the rear end of the shielding cover is arranged not to contact with the cover body; the structure arrangement avoids large-area contact between the relative moving parts, and reduces the possibility of frosting.

According to this disclosure, through establishing the supporter with rotatory barrel cover, shielding cover screw in rotatory barrel, wear to establish the end cover with the guide bar at last, shield the cover installation, realized the fixed mode of layering, have the advantage of installation facility.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a view of an external appearance of a refrigerator according to an embodiment of the present disclosure;

fig. 2 is a view of a refrigerator according to an embodiment of the present disclosure, with a door body omitted;

fig. 3 is a sectional view of a refrigerator according to an embodiment of the present disclosure;

FIG. 4 is an enlarged view at A in FIG. 3;

fig. 5 is a schematic view illustrating a state where a shielding apparatus of a refrigerator according to an embodiment of the present disclosure opens an air inlet of a fan;

fig. 6 is a schematic view of a state where a shielding apparatus of a refrigerator according to an embodiment of the present disclosure closes an air inlet of a blower fan;

fig. 7 is a view of a shielding apparatus of a refrigerator according to an embodiment of the present disclosure in a closed state;

fig. 8 is a view of a shielding apparatus of a refrigerator according to an embodiment of the present disclosure in an initial opened state;

fig. 9 is an exploded view of a shielding apparatus of a refrigerator according to an embodiment of the present disclosure;

FIG. 10 is an exploded view of an end cap and drive assembly of a refrigerator according to an embodiment of the present disclosure;

FIG. 11 is a view of an end cap and drive assembly of a refrigerator according to an embodiment of the present disclosure;

FIG. 12 is a view of an end cap and a rotary cylinder of a refrigerator according to an embodiment of the present disclosure;

fig. 13 is an exploded view of an end cap, a spin basket, and a shield cover of a refrigerator according to an embodiment of the present disclosure;

fig. 14 is a sectional view of a shielding apparatus of a refrigerator according to an embodiment of the present disclosure in an initial open state;

FIG. 15 is an enlarged view at B of FIG. 14;

FIG. 16 is an enlarged view at C of FIG. 14;

fig. 17 is an exploded view of an end cover, a shield cover, and a guide bar of a refrigerator according to an embodiment of the present disclosure;

fig. 18 is a sectional view of a shielding apparatus of a refrigerator according to an embodiment of the present disclosure in a closed state;

FIG. 19 is an enlarged view at F of FIG. 18;

fig. 20 is a view of a heater wire and a heater wire placing tube of a refrigerator according to an embodiment of the present disclosure;

fig. 21 is a front view of a shielding apparatus of a refrigerator according to an embodiment of the present disclosure on an inner container;

in the above figures: 1. a refrigerator; 10. a box body; 11. an inner container; 111. a groove part; 12. a housing; 13. a cover plate; 20. a door body; 30. a storage compartment; 31. a refrigerating chamber; 32. a freezing chamber; 41. an evaporator; 42. a fan; 43. an evaporator chamber; 50. an air duct assembly; 51. an air return opening; 52. a fan air inlet; 53. a wind guide ring; 60. a shielding device; 61. an end cap; 611. a cover body; 611a, a first connection portion; 611b, a first leg part; 612. a support body; 613. an accommodating cavity; 614. a support boss; 615. screw holes; 616. installing a shaft; 617. a support shaft; 618. mounting grooves; 619. grooving; 62. a rotary drum; 621. internal teeth; 622. a boss portion; 623. a helical groove; 624. a first contact post; 63. a shielding cover; 631. a transmission cavity; 632. a helical strip; 633; a second connecting portion; 634. a second leg portion; 635. mounting an avoidance hole; 64. a drive assembly; 641. a motor; 642. a drive gear; 643. a support gear; 65. a stopper plate; 66. a stopper shaft; 661. a stop ring; 662. a second contact post; 663. a third contact post; 67. a guide bar; 671. a support; 672. buckling; 673. a first snap ring; 68. a guide ring; 681. a guide hole; 682. a convex ring; 683. a second snap ring; 70. a heating wire; 71. a heating wire placing pipe.

Detailed Description

The invention is described in detail below by way of exemplary embodiments. It should be understood, however, that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When the refrigerator is used, one side facing a user is the front, and the other side opposite to the front is the back.

Referring to fig. 1 to 3, a refrigerator 1 according to one embodiment of the present disclosure includes a cabinet 10, a storage compartment 30 formed inside the cabinet 10, a cool air supply apparatus generating cool air, and a door 20 opening and closing the storage compartment 30.

The casing 10 is substantially rectangular parallelepiped in shape and includes an inner container 11 and an outer casing 12. A storage compartment 30 is formed inside the inner container 11, and the housing 12 is located outside the inner container 11. A foam insulation material configured to insulate the storage compartment 30 may be filled between the inner container 11 and the outer case 12.

The storage compartment 30 may be partitioned into a refrigerator compartment 31 and a freezer compartment 32 by an intermediate partition wall. However, unlike the present embodiment, the refrigerator may be provided with a vacuum chamber, a temperature changing chamber, and the like, and the aspects of the present disclosure may be applied as well.

The storage compartment 30 may be provided with an opening at a front surface thereof to store or take out food materials. The opening may be opened or closed by the door body 20. The storage compartment 30 may be opened or closed by a plurality of rotary door bodies 20. In other implementations, the storage compartment 30 may also be opened or closed by a drawer-type door that is configured to be inserted into or pulled out from the inside.

The cold air supply device is provided to form cold air by circulating a cooling circuit, and can supply the generated cold air to the storage compartment 30. The cool air supply device may include cooling circuit devices having a compressor, a condenser, a capillary tube, and an evaporator 41, a refrigerant pipe guiding refrigerant into each cooling circuit device, and a fan 42 forcibly circulating air to supply cool air generated at the evaporator 41 to the storage compartment 30. The compressor may be provided in a press machine room formed at a lower portion of the case 10.

The following description will be made with respect to the positional relationship of the air duct assembly 50 and the evaporator 41 on the refrigerator 1, taking the double door refrigerator (the left side is the freezing chamber 32 and the right side is the refrigerating chamber 31) as an example in the drawings, in order to facilitate understanding of the principle of the refrigerating air circulation of the refrigerator. In other embodiments, any type of refrigerator is suitable for use in various aspects of the present disclosure, such as a refrigerated freezer disposed above and below, and other positional relationships for the duct assembly and evaporator are possible.

With continued reference to fig. 3 and 4, a cover plate 13 is disposed at the rear side of the inner container 11, an evaporator cavity 43 is enclosed between the cover plate 13 and the rear wall of the inner container 11, and the evaporator 41 is installed in the evaporator cavity 43; an air return opening 51 is formed between the lower end of the cover plate 13 and the rear wall of the inner container 11.

The refrigerator 1 may include an air duct assembly 50 installed at a rear side of the inner container 11. The fan 42 is installed in the air duct assembly 50, a fan inlet 52 is provided on the rear wall of the air duct assembly 50, and an air supply outlet (not shown) is provided on the front wall of the air duct assembly 50, and the fan inlet 52 and the air supply outlet are communicated through the air duct in the air duct assembly 50.

The fan inlet 52 communicates with the evaporator chamber 43. When the refrigerator is refrigerating, under the forced circulation action of the fan 42, the cold air at the evaporator 41 enters the air duct assembly 50 through the fan air inlet 52 and is blown into the storage compartment 30 at the front side from the air supply outlet, and the air in the storage compartment 30 returns to the evaporator 41 through the air return inlet 51, so that the refrigerating cycle is formed.

After the refrigerator is operated for a long time, frost is formed on the evaporator 41 for supplying cooling capacity, and it is required to heat and defrost it. During the defrosting process of the refrigerator, if the blower inlet 52 is not closed, the hot air at the evaporator 41 enters the storage compartment 30 through the air duct assembly 50, so that the temperature in the storage compartment 30 is increased, and the quality of the stored goods in the storage compartment 30 is affected.

Accordingly, in embodiments of the present disclosure, a shielding device 60 is provided that can open or close the fan inlet 52. Referring to fig. 5, when the refrigerator normally operates, the shielding device 60 opens the fan inlet 52; referring to fig. 6, when the refrigerator is heated for defrosting, the shielding device 60 closes the fan inlet 52, so that the influence of the hot air at the evaporator 41 on the temperature of the storage compartment 30 can be effectively avoided.

Referring to fig. 7 to 9, a shielding apparatus 60 according to an embodiment of the present disclosure is mounted to a rear side of the fan inlet 52, and includes an end cover 61, a rotary cylinder 62, a shielding cover 63, and a driving assembly 64. The rotary cylinder 62 is driven by a driving assembly 64 to rotate relative to the end cover 61, and the shielding cover 63 is screwed with the rotary cylinder 62, so that the rotation of the rotary cylinder 62 is converted into the forward and backward movement of the shielding cover 63. When the rotary cylinder 62 rotates forward, the shielding cover 63 moves forward to the fan air inlet 52; when the spin basket 62 is rotated reversely, the shield cover 63 moves rearward away from the fan inlet 52 (the "normal rotation" and the "reverse rotation" described herein are relative concepts and are used only to distinguish the difference in the rotation direction of the spin basket 62).

Referring to fig. 10 to 13, the end cap 61 includes a cap body 611 and a support body 612 coupled to a front end of the cap body 611. The driving assembly 64 is installed in the supporting body 612, the rotating cylinder 62 is sleeved outside the supporting body 612, and the shielding cover 63 is spirally connected outside the rotating cylinder 62. Thus, the driving component 64 is embedded in the transmission mechanism, the size of the front and back direction occupied by the driving component 64 is reduced, the size of the shielding device 60 is reduced, the size is small, a foaming layer does not need to be thinned, and condensation water generated on the rear wall of the refrigerator is avoided.

Referring to fig. 10 in particular, the end cap 61 is provided with a receiving cavity 613 extending forward from the rear end thereof into the supporting body 612, that is, the supporting body 612 is provided with a receiving cavity 613 with an open rear end. The drive assembly 64 is a motor and gear arrangement. The motor 641 is mounted in the housing chamber 613 from the rear end of the end cover 61, the output shaft of the motor 641 penetrates the support body 612 from the front side, and the driving gear 642 is connected to the output shaft of the motor 641.

Referring specifically to fig. 12, the rotary cylinder 62 is substantially cylindrical and is disposed around the support 612. The inner circumferential surface of the rotary cylinder 62 is provided with inner teeth 621, and the inner teeth 621 are engaged with the driving gear 642, thereby transmitting the power of the motor 641 to the rotary cylinder 62 through gear transmission.

The internal teeth 621 are provided at the front end of the rotary cylinder 62, and can reduce the axial dimension of the rotary cylinder 62, thereby further reducing the thickness of the shielding device 60.

In the present disclosure, the manner that the driving gear 642 is directly engaged with the internal teeth 621 is adopted, so that the size increase caused by multi-stage gear transmission is avoided, the volume of the shielding device 60 is reduced, and the structure of the shielding device 60 is simplified.

Referring to fig. 13, a transmission cavity 631 with an open rear end is disposed in the center of the shielding cover 63, a spiral strip 632 extending in a spiral shape is disposed on the inner circumferential surface of the transmission cavity 631, a protrusion 622 protruding outward is disposed on the outer circumferential surface of the rotary cylinder 62, a spiral groove 623 extending in a spiral shape is disposed on the protrusion 622, and the spiral strip 632 is adapted to the spiral groove 623. The rotary cylinder 62 rotates, and the shielding cover 63 is pushed to move by the cooperation of the spiral strip 632 and the spiral groove 623.

In the present disclosure, the motor 641 is disposed in the supporting body 612, that is, the motor 641 is located inside the screw transmission mechanism, so that the axial space occupied by the motor 641 can be reduced, and the present disclosure has the advantages of compact structure and small occupied space.

The shield cover 63 has an initial open position (shown in fig. 8) in which the shield cover 63 is in an extreme position away from the fan inlet 52; in the closed position (shown in fig. 7), the shield 63 covers the fan inlet 52.

The present disclosure is configured such that the shield cover 63 covers the rotary cylinder 62 at the initial open position, and the rotary cylinder 62 is separated from the shield cover 63 forward and backward at the time of transition from the initial open position to the closed position. The drive assembly 64 is located at the center level, the rotary cylinder 62 is located at the middle level, and the shield cover 63 is located at the outermost level, so that the layered design among the components in the shield device 60 is realized. The rotary cylinder 62 is hidden in the shield cover 63 at the initial open position, reducing the dimension in the front-rear direction occupied by the rotary cylinder 62, further reducing the axial space occupied by the shield device 60.

In the present disclosure, the spiral groove 623 is provided at the front end of the rotary cylinder 62, and the shielding cover 63 is connected to the front end of the rotary cylinder 62 at the rear end thereof when the fan inlet 52 is closed forward, so that space occupation during relative movement is reduced.

In some embodiments of the present disclosure, the spiral groove 623 has two spiral grooves arranged at 180 ° on the outer circumferential surface of the rotary cylinder 62, and correspondingly, the spiral strip 632 also has two spiral grooves on the inner circumferential surface of the transmission cavity 631, and the double spiral fit can reduce the rotation angle of the rotary cylinder 62 and improve the moving efficiency of the shielding cover 63.

In some embodiments of the present disclosure, a driving gear 642 is installed at an upper portion of a front end of the support body 612 to support a front end of the rotary cylinder 62.

In another embodiment of the present disclosure, with continued reference to fig. 11 and 12, the shielding device 60 may include a plurality of gears, one driving gear 642 and two supporting gears 643, wherein the supporting gears 643 and the driving gears 642 are circumferentially spaced at the front end of the supporting body 612 and are engaged with the internal teeth 621 of the rotary cylinder 62. In this way, the driving gear 642 and the supporting gear 643 form three-point support for the rotating cylinder 62, so as to ensure the stability of the rotating cylinder 642 during rotation, and thus the rotating cylinder 642 can push the shielding cover 63 to move more smoothly.

A support shaft 617 extending forward is provided at a front end of the support body 612, and a support gear 643 is inserted into the support shaft 617.

The rotary cylinder 62 is a hollow cylindrical structure, and if accumulated water is generated at the bottom of the rotary cylinder and cannot be discharged, the accumulated water is easily frosted inside and outside the rotary cylinder 62 or between the rear end of the rotary cylinder 62 and the end cover 61, so that the rotary cylinder 62 or the shielding cover 63 is frozen, and the whole structure is failed.

Therefore, referring to fig. 11, 14 and 15, in the embodiment of the present disclosure, a plurality of supporting protrusions 614 are disposed at intervals on the circumference of the rear end of the supporting body 612, and the supporting protrusions 614 are used for supporting the rear end of the rotary drum 62, so that the front end of the rotary drum 62 is supported by the gear, and the rear end of the rotary drum 62 is supported by the supporting protrusions 614, compared with the case that the rotary drum 62 is supported by the entire supporting body 612, the contact area between the rotary drum 62 and the supporting body 612 is reduced, and the possibility of frost formation at the rotary drum 62 is reduced.

The end surface of the supporting rotary cylinder 62 on the supporting projection 614 is a cambered surface, so that the contact area between the rotary cylinder 62 and the supporting projection 614 can be further reduced, and the possibility of frost formation at the rotary cylinder 62 can be reduced.

A gap d1 is provided between the rotary cylinder 62 and the support protrusion 614. During the natural state, because the front end of rotatory section of thick bamboo 62 is supported by the gear, rotatory section of thick bamboo 62 can present the low, the high state of front side of rear side under the action of gravity, can discharge the inboard ponding of rotatory section of thick bamboo 62 during the defrosting, avoids the ponding that ponding and lead to in the rotatory section of thick bamboo 62 to freeze the problem.

In addition, in the shielding device 60, if the relatively moving member is closely attached to a large area at rest, frost is formed at the attaching portion, and the two members are adhered to each other; the rubber is stuck when relative movement is needed, and cannot move relatively, so that the phenomenon of freezing and blocking occurs. Therefore, the contact is avoided when the end face is attached; and at the necessary contact position, a small bump is used for contact, so that frosting and freezing caused by large-area contact are avoided.

In some embodiments of the present disclosure, the rotary cylinder 62 is a cylinder with front and rear openings, which facilitates the engagement of the internal teeth 621 of the rotary cylinder 62 with the gears during assembly.

The cover body 611 forms a stopper of the rear end of the rotary cylinder 62, limiting the backward movement of the rotary cylinder 62. With reference to fig. 15, the first contact column 624 is disposed on the rear end surface of the rotary cylinder 62, and the first contact column 624 is in contact with the cover body 611, so that compared with the case where the rear end surface of the rotary cylinder 62 is in contact with the cover body 611, the contact area is reduced, and frost freezing caused by large-area contact is avoided.

Referring to fig. 9, in order to define the rotary cylinder 62 on the support body 612, the shielding apparatus 60 further includes a stop plate 65, the stop plate 65 is provided at the front end of the rotary cylinder 62 to be connected to the support body 612, and the stop plate 65 forms a stop for the rotary cylinder 62 to limit the forward movement of the rotary cylinder 62.

In some embodiments of the present disclosure, the front end of the supporting body 612 is provided with a mounting shaft 616 extending forward, the stop plate 65 is arranged on the mounting shaft 616 in a penetrating manner, and the front end of the mounting shaft 616 is provided with a screw and a gasket, so that the gasket forms a stop for the stop plate 65 and limits the forward movement of the stop plate 65.

In other embodiments of the present disclosure, referring to fig. 14 and 16, the front end of the supporting body 612 is provided with a mounting shaft 616 extending forward, the stop plate 65 is disposed on the mounting shaft 616, the front end of the mounting shaft 616 is connected with the stop shaft 66, the front end of the stop shaft 66 is provided with threads, the stop shaft 66 is connected to the mounting shaft 616 in a threaded manner, the rear end of the stop shaft 66 is provided with a stop ring 661, and the stop ring 661 forms a stop for the stop plate 65 to limit the forward movement of the stop plate 65.

A second contact stud 662 protruding rearward is provided on a rear end surface of the stopper ring 661. The second contact column 662 is in contact with the stop plate 65, so that the contact area of the stop plate 65 and the stop ring 661 is reduced, and frost freezing caused by large-area contact is avoided.

A third contact post 663 protruding forward is provided on the front end surface of the stopper ring 661. The third contact post 663 is in contact with the shield cover 63 in the initial opening position, so that the contact area of the shield cover 63 and the stop ring 661 is reduced, and frost freezing caused by large-area contact is avoided.

In the initial open position, referring to fig. 15, a gap d2 is formed between the rear end of the shielding cover 63 and the cover body 611, and the shielding cover 63 and the cover body 611 are not in contact with each other, thereby preventing frost from adhering to each other.

The shielding device 60 may include a guide rod 67 provided on the end cap 61, the guide rod 67 extending to the front side, and the shielding cover 63 inserted on the guide rod 67 to be movable forward and backward along the guide rod 67.

In the embodiment of the present disclosure, the guide rod 67 may have one, or two spaced apart, however, the guiding function of one or two guide rods 67 may have an unstable problem; therefore, as a preferred embodiment, in the current embodiment, there are three guide rods 67, the three guide rods 67 are all located on the circumference of the same circle, and the center of the circle is opposite to the center of the shielding cover 63, so that the problems of distortion and clamping in the moving process of the shielding cover 63 can be avoided, the shielding cover 63 can run more stably, and shaking is not easy to generate.

In some embodiments of the present disclosure, the end cap 61 and the shield 63 are substantially triangular dart-shaped.

Referring to fig. 10, the cover body 611 includes a first connection portion 611a, and three first leg portions 611b extending outward from the first connection portion 611a, the first connection portion 611a is substantially circular, and the first leg portions 611b are smoothly connected to the first connection portion 611 a; the support 612 is connected to the front end of the first connection 611 a.

Referring to fig. 13, the shield cover 63 includes a second connection portion 633, and three second leg portions 634 extending outward from the second connection portion 633; the second connecting portion 633 is substantially circular, and the second leg portion 634 is smoothly connected with the second connecting portion 633; the transmission chamber 631 is connected to a rear end of the second connection portion 633.

Referring to fig. 17, the guide rod 67 is inserted through the first leg portion 611b and the second leg portion 634. Compared with the square structure in the prior art, the shapes of the end cover 611 and the shielding cover 63 of the embodiment of the present disclosure reduce the volume, and save the occupied space and the cost.

The rear end of the guide rod 67 is provided with a support 671, and the support 671 is clamped with the first leg part 611b. The form of the snap fit avoids the problem of the screw head taking up space when screws are used in the related art, further reducing the size of the shielding device 60.

Specifically, an "L" -shaped mounting groove 618 is provided on the upper side of the rear end of the first leg portion 611b, and the support 671 is mounted in the mounting groove 618 such that the rear surface of the support 671 does not protrude beyond the rear surface of the first leg portion 611b. At the same time, the bottom wall of the mounting groove 618 can also form a mounting location for the support 671, facilitating the assembly operation.

A catch 672 extending forward is provided at each of opposite ends of the seat 671, and accordingly a slot 619 is provided in the first leg portion 611b, and the catch 672 catches the first leg portion 611b from the slot 619. The slot 619 is configured such that the side of the latch 672 does not protrude from the side of the first leg portion 611b.

The final assembly of the guide rod 67 can be achieved in the present disclosure, the guide rod 67 penetrates the first leg portion 611b and the second leg portion 634 from the rear to the front, and finally the support 671 is clamped on the first leg portion 611b. This is because, if the guide bar 67 is installed first, after the shield cover 63 is assembled by passing through the guide bar 67, there is inconvenience in rotating the rotary cylinder 62 to be spirally aligned with the shield cover 63 due to the space influence of the guide bar 67. And the guide bar 67 is finally assembled, the convenience of mounting the shield cover 63 can be improved.

In some embodiments of the present disclosure, the front end surface of the second leg portion 611b on the shield cover 63 is in the same plane as the front end surface of the second connection portion 633; the rear wall of the air duct assembly 50 is provided with a wind guiding ring 53 protruding backward at the periphery of the fan wind inlet 52, and the second connecting portion 633 of the shielding cover 63 abuts against the wind guiding ring 53 when in the closed position, so as to close the fan wind inlet 52.

Referring to fig. 4, when the shielding cover 63 is in the closed position, the front end of the guide rod 67 extends out of the front end surface of the second leg portion 611b, so that the shielding cover 63 is ensured not to be disengaged from the guide rod 67 during the moving process; the front end of the guide rod 67 has a gap or is abutted against the rear wall of the air duct assembly 50, so that the guide rod 67 is prevented from being too long, and the shielding cover 63 is prevented from being separated from the rotary cylinder 62 in the moving process.

In other embodiments of the present disclosure, referring to fig. 18, the shielding device 60 may include a guide ring 68, the guide ring 68 having a ring shape and being installed at a rear end of the guide rod 67, the shielding cover 63 moving along the guide rod 67 between the end cap 61 and the guide ring 68; the shielding cover 63 is prevented from falling off the guide rod 67 and the rotary cylinder 62 due to the blocking of the guide ring 68.

The guide ring 68 is provided with a guide hole 681, and the front end of the guide rod 67 is inserted into the guide hole 681 and is not exposed from the front end of the guide hole 681.

A projecting ring 682 extending rearward is provided on the guide ring 68 at a position corresponding to the guide hole 681, and the inner peripheral surface of the projecting ring 682 is an extension of the guide hole 681. The provision of the convex ring 682 increases the coupling area of the guide ring 68 with the guide bar 67 without increasing the overall thickness of the guide ring 68.

The guiding hole 681 and the guiding rod 67 are in a close clearance fit, and strong glue can be filled into the close clearance to bond the guiding ring 68 and the guiding rod 67.

Alternatively, with reference to fig. 19, the guide rod 67 and the guide ring 68 are clamped: a first clamping ring 673 is arranged on the periphery of the guide rod 67, and the outer diameter of the first clamping ring 673 is gradually increased from front to back; the guide hole 681 is provided with a second snap ring 683, the inner diameter of the second snap ring 683 is gradually increased from front to back, and the first snap ring 673 penetrates through the front side of the second snap ring 683 in an interference manner to realize clamping connection of the two.

The shutter 60 may be damaged by the shutter 63 being frozen on the guide bar 67 during operation, so that the shutter 63 cannot move forward and backward, thereby causing the shutter 60 to fail.

Therefore, in other embodiments of the present disclosure, the shielding device 60 further includes a heating wire 70 for heating the guide bar 67 to prevent the connection of the shielding cover 63 and the guide bar 67 from being frozen. The heating wire 70 is arranged in the guide rod 67; specifically, the guide rod 67 has a hollow structure, and the heating wire 70 is disposed in a hollow groove of the guide rod 67.

The two ends of the heating wire 70 are connected with a heating wire power supply for heating, ice on the guide rod 67 can be melted by heating the heating wire 70, and the problem that the shielding cover 63 is frozen is solved. The heating wire can be made of constantan, kang Mengtong alloy, zinc cupronickel, nickel-chromium alloy, copper-nickel alloy, iron-chromium-aluminum alloy and the like.

Wherein, heater strip 70 can seal in heater strip placement tube 71, and heater strip placement tube 71 can play the guard action to heater strip 70 like this, has avoided external environment to produce the influence to heater strip 70. Both ends of the heater wire 70 are connected to electric wires, respectively, which are passed through the heater wire accommodating tube 71 and then connected to a heater wire power supply. The wire accommodating tube 71 may be made of a high temperature resistant material, which prevents the wire 70 from melting the wire accommodating tube 71.

The shielding device 60 of the present disclosure can install the motor 641 and the gear on the front and rear sides of the end cover 61, respectively, then put the rotary cylinder 62 on the support 612 and engage with the gear, install the stop plate 65 for limiting, then screw the shielding cover 63 on the rotary cylinder 62, and finally wear the end cover 61 and the shielding cover 63 with the guide rod 67 and clamp the end cover 61. The structural design of the utility model realizes the layering fixation and the sequential installation, and has the advantage of convenient assembly.

The whole shielding device 60 can be mounted on the air duct assembly 50 or the inner container 11 corresponding to the fan air inlet 52 after being assembled.

The shielding device 60 is mounted on the inner container 11 for example:

referring to fig. 8 and 21, a groove 111 recessed backward is formed in the rear wall of the inner container 11 at a position corresponding to the blower inlet 52, the shielding device 60 is installed in the groove 11, and the end cover 61 is fixedly connected to the rear wall of the inner container 11 by screws.

The first leg portion 611b of the end cover 61 is provided with a screw hole 615, the second leg portion 634 of the shielding cover 63 is provided with an installation avoiding hole 635, and the installation avoiding hole 635 and the screw hole 615 are coaxial. During assembly, an electric screwdriver or a manual screwdriver extends into the screw hole 615 from the installation avoiding hole 635 to perform a screwing operation. Thus, the provision of the installation escape hole 635 improves the convenience of the assembling operation.

The working process of the refrigerator comprises the following steps: when the refrigerator is in a refrigerating condition, the shielding cover 63 is far away from the fan air inlet 52, and at the moment, the fan 42 normally sucks air cooled by the evaporator 41 from the fan air inlet 52 to refrigerate the freezing chamber 32. When the refrigerator is to be defrosted, firstly, an instruction is sent to the electric control board of the refrigerator, the motor 641 starts to work, the driving gear rotates to drive the rotary cylinder 62 to rotate, the shielding cover 63 is pushed to move forwards, and the air inlet 52 of the fan is sealed, so that the evaporator cavity 43 is completely separated from the air duct assembly 50 and the freezing chamber. Then, the evaporator heating wire heats the frost, and after the frost is melted, the motor 641 rotates reversely to drive the driving gear to rotate, so that the shielding cover 63 is far away from the air inlet 52 of the fan, and the original refrigeration air duct structure is restored. In the defrosting process, the evaporator cavity 43 is completely closed, so that heat cannot be lost, the defrosting time is shortened, and the defrosting energy consumption is reduced. Meanwhile, heat cannot enter the freezing chamber 32, and the fresh-keeping effect of the meat in the freezing chamber 32 cannot be influenced by temperature fluctuation

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A refrigerator, characterized by comprising:

a liner defining a storage compartment;

the air duct assembly is arranged at the rear end of the storage compartment, and a fan air inlet is formed in the rear wall of the air duct assembly; and

the shielding device is arranged at the air inlet of the fan and used for opening or closing the air inlet of the fan; wherein the shielding device comprises:

an end cap having a forwardly extending support body;

the driving assembly is arranged on the supporting body;

the rotating cylinder is sleeved on the supporting body and is driven by the driving component to rotate; and

the shielding cover is spirally connected with the rotary cylinder so as to convert the rotary motion of the rotary cylinder into the front and back movement of the shielding cover;

the rear end of the periphery of the support body is provided with a plurality of supporting bulges for supporting the rear end of the rotary drum;

the rotating cylinder and the supporting protrusion have a gap therebetween in a radial direction.

2. The refrigerator according to claim 1,

the drive assembly includes:

and the driving gear is arranged on the upper side of the front end of the supporting body and is meshed with the internal teeth of the rotating cylinder.

3. The refrigerator of claim 2, wherein the shielding device further comprises:

and the supporting gears are arranged at the front end of the supporting body at intervals of the driving gear and are meshed with the internal teeth of the rotating cylinder.

4. The refrigerator of claim 1, wherein the end cap includes a cap body coupled to a rear end of the support body, and a rear end surface of the rotary cylinder is provided with a plurality of first contact posts protruding rearward, the first contact posts being in contact with the cap body.

5. The refrigerator according to claim 1, wherein a front end of the rotary cylinder is opened; the shading device further comprises:

the stop plate is arranged at the front end of the rotating cylinder and can stop the rotating cylinder from moving forwards when the stop plate is abutted against the rotating cylinder; and

the stop shaft penetrates through the stop plate and is connected with the support body, an outward convex stop ring is arranged at the front end of the stop shaft, and the stop ring can limit the forward movement of the stop plate when the stop plate abuts against the stop ring.

6. The refrigerator according to claim 5, wherein a rear end surface of the stopper ring is provided with a second contact post protruding rearward; or/and

and a third contact column protruding forwards is arranged on the front end surface of the stop ring.

7. The refrigerator of claim 1, wherein the end cap includes a cap body coupled to a rear end of the support body; the rear end of the shielding cover is not contacted with the cover body.

8. The refrigerator of claim 1, wherein the shielding device further comprises:

the guide rod is arranged on the end cover, and a heating wire is arranged in the guide rod; the shielding cover is arranged through the guide rod.

9. The refrigerator as claimed in claim 1, wherein the end surface of the support protrusion supporting the rotary cylinder is a curved surface.