CN114234528A

CN114234528A - A kind of refrigerator

Info

Publication number: CN114234528A
Application number: CN202010941876.1A
Authority: CN
Inventors: 张升刚; 韩丽丽; 张月; 张守杰
Original assignee: Hisense Shandong Refrigerator Co Ltd
Current assignee: Hisense Shandong Refrigerator Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2022-03-25
Anticipated expiration: 2040-09-09
Also published as: CN114234528B

Abstract

The invention discloses a refrigerator, relates to the technical field of storage equipment, and aims to solve the problem that the temperature in a storage chamber fluctuates and the fresh-keeping effect is influenced because hot air enters the storage chamber when the conventional refrigerator is defrosted. The refrigerator comprises an inner container, a storage chamber is formed inside the inner container; the air channel cover plate forms an air channel with the rear wall of the inner container, and an air port for communicating the air channel with the storage chamber is formed in the air channel cover plate; the defrosting device is used for heating the heater for defrosting; the shielding plate is movably arranged at the air inlet and is used for opening or closing the air inlet; the driving mechanism is used for driving the shielding plate to move; and the control unit controls the driving mechanism to drive the shielding plate to close the air port when the defrosting device defrosts the evaporator, and controls the driving mechanism to drive the shielding plate to open the air port when defrosting is finished. The invention is used for storing food materials.

Description

A kind of refrigerator

Technical Field

The invention relates to the technical field of storage equipment, in particular to a refrigerator.

Background

The refrigerator is a household appliance commonly used in daily life. Because the fluctuation of the temperature can accelerate the degradation of protein, promote the growth and the reproduction of microorganisms and destroy muscle tissues, the preservation period of the frozen meat is directly influenced, and therefore, the preservation effect of the refrigerator is a key index for judging the performance of the refrigerator.

The mainstream refrigerator used by people at present is an air-cooled frost-free refrigerator, which comprises an inner container, wherein a storeroom is formed inside the inner container, an air channel cover plate is arranged in the storeroom, a circulating air channel is formed between the air channel cover plate and the rear wall of the storeroom, an evaporator is arranged in the circulating air channel, an air port is arranged on the air channel cover plate, cold air is sent into the storeroom from the air port after the evaporator is refrigerated, and the surface of the evaporator is defrosted by heating through a heating wire after the evaporator is frosted, so that the manual defrosting of a user is not needed.

However, the circulating air duct of the air-cooled refrigerator is communicated with the storage chamber, when the evaporator is heated and defrosted by the heating wire, the generated hot air can directly enter the storage chamber through the air opening to cause temperature fluctuation in the storage chamber, and the fluctuation range can reach about 15 ℃, so that the fresh-keeping effect of the refrigerator can be influenced, and the user experience is reduced.

Disclosure of Invention

The embodiment of the invention provides a refrigerator, which can prevent heat generated by an evaporator from entering a storage chamber when the evaporator is defrosted, so that the temperature in the storage chamber is prevented from fluctuating, the fresh-keeping effect of the refrigerator is ensured, and the user experience is improved.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

an embodiment of the present invention provides a refrigerator, including:

an inner container, inside which a storage chamber is formed;

the air duct cover plate and the rear wall of the inner container form an air duct, and an air port for communicating the air duct and the storage chamber is arranged on the air duct cover plate;

the defrosting device is used for heating and defrosting the evaporator;

the shielding plate is movably arranged at the air port and used for opening or closing the air port;

the driving mechanism is used for driving the shielding plate to move;

and the control unit controls the driving mechanism to drive the shielding plate to close the air port when the defrosting device defrosts the evaporator, and controls the driving mechanism to drive the shielding plate to open the air port when defrosting is finished.

According to the refrigerator provided by the embodiment of the invention, the shielding plate is arranged in the air channel, the driving mechanism can drive the shielding plate to open or close the air port, when the air port is closed by the shielding plate, the air channel is isolated from the storage chamber, so that air in the air channel can be prevented from entering the storage chamber, and when the air port is opened by the shielding plate, the air channel is communicated with the storage chamber, so that the air in the refrigerator can flow in a normal circulation manner; compared with the prior art, the refrigerator that this application provided is in evaporimeter normal operating, the wind gap is opened to the shielding plate, the cold air that the evaporimeter produced passes through in the wind gap gets into the storeroom, ensure refrigerator normal operating, when defroster heated the defrosting to the evaporimeter, the control unit control actuating mechanism drive shielding plate of refrigerator is closed the wind gap on with the wind channel apron, make wind channel and storeroom isolated each other, the heat that produces when avoiding the defrosting gets into in the storeroom through the wind gap, thereby avoid the temperature in the storeroom to produce undulantly, guarantee the fresh-keeping effect of refrigerator.

Furthermore, the wind channel internal fixation is provided with the mounting box, actuating mechanism set up in the mounting box, the shielding plate with the mounting box passes through slip subassembly sliding connection, the shielding plate with the wind channel apron is parallel, the slip subassembly makes the shielding plate can follow the perpendicular to the direction of wind channel apron slides, works as the shielding plate closes during the wind gap, the shielding plate with on the wind channel apron a week edge laminating in wind gap, works as the shielding plate is opened during the wind gap, the shielding plate with the separation of wind channel apron.

Furthermore, the sliding assembly comprises a fixed block fixed on the upper portion of the shielding plate, the fixed block extends into the mounting box from the opening at the bottom of the mounting box, a fixed rod is fixed on the fixed block, the fixed rod is arranged along the horizontal direction and is parallel to the air duct cover plate, pulleys are rotatably connected to two ends of the fixed rod, and the pulleys are abutted to the bottom surface of the mounting box.

Furthermore, a guide part is arranged in the mounting box, and the guide part can enable the pulley to roll along the direction vertical to the air duct cover plate.

Furthermore, the guide part comprises two bosses, the two bosses are arranged corresponding to the two pulleys, the surfaces of the pulleys, facing to the corresponding bosses, are guide surfaces, the guide surfaces are perpendicular to the bottom surface of the mounting box and perpendicular to the air duct cover plate, and the side surfaces of the pulleys are attached to the corresponding guide surfaces.

Furthermore, the two bosses are arranged between the two pulleys, the baffle plate is fixedly provided with a positioning rod, the positioning rod is parallel to the fixing rod, the opposite surfaces of the two bosses are provided with sliding grooves, the length direction of the sliding grooves is perpendicular to the air duct cover plate, and the two ends of the positioning rod are respectively inserted into the corresponding sliding grooves.

Furthermore, two opposite side walls perpendicular to the fixing rod in the mounting box are provided with limiting plates, the limiting plates are arranged in the horizontal direction and perpendicular to the air duct cover plate, and the pulleys are arranged between the limiting plates and the bottom surface of the mounting box.

Furthermore, the mounting box is provided with mounting ports for mounting the pulleys on two opposite side walls perpendicular to the fixing rod, and the mounting ports are arranged between the bottom surface of the mounting box and the limiting plate.

Furthermore, a sealing ring is arranged on the surface of the shielding plate facing the air duct cover plate, and when the air opening is closed by the shielding plate, the sealing ring is in pressing contact with the air duct cover plate.

Further, the sealing washer includes sealing, connecting portion and joint portion, the sealing set up in the connecting portion orientation on the face of wind channel apron, joint portion set up in the connecting portion orientation on the face of shielding plate, the joint hole has been seted up at the edge of shielding plate, joint portion joint in the joint is downthehole, the sealing set up in on the inboard border of connecting portion and to the outside border of connecting portion extends, the cross-section of sealing is arc and concave surface orientation connecting portion work as the shielding plate is closed during the wind gap, the sealing with wind channel apron extrusion contact.

Drawings

Fig. 1 is a schematic view of an overall structure of a refrigerator according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a blocking plate closing an air opening on an air duct cover plate according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of the shielding plate opening the air port on the air duct cover plate according to the embodiment of the present invention;

FIG. 4 is an exploded view of the overall structure of the shutter, the duct cover, and the driving mechanism according to the embodiment of the present invention;

fig. 5 is an exploded view of the overall structure of the shielding plate, the driving mechanism and the mounting box according to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a shielding plate according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a right housing of the mounting box according to a first angle in the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second angle of a right housing of the mounting box according to the embodiment of the present invention;

fig. 9 is a schematic cross-sectional view of a mounting box according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a sealing ring mounted on a shielding plate according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a blocking plate provided with a clamping hole according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a sealing ring according to an embodiment of the present invention;

fig. 13 is a schematic cross-sectional structure view of a seal ring according to an embodiment of the present invention.

Reference numerals: 100. a box body; 101. a storage chamber; 101A, a freezing chamber; 101B, a refrigerating chamber; 110. an inner container; 200. a door body; 200A; a freezing chamber door; 200B, a refrigerating chamber door; 300. an air duct cover plate; 310. a tuyere; 400. a shielding plate; 410. a fixed block; 411. a rack; 420. fixing the rod; 430. a pulley; 440. positioning a rod; 450. a clamping hole; 500. mounting a box; 510. a boss; 511. a guide surface; 512. a sliding groove; 520. a limiting plate; 530. an installation port; 540. a left housing; 550. a right housing; 560. a drain hole; 570. a vent hole; 600. a seal ring; 610. a sealing part; 620. a connecting portion; 630. a clamping part; 700. a drive motor; 710. a gear.

Detailed Description

Embodiments of the present invention provide a refrigerator described in detail below with reference to the accompanying drawings.

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", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, 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, "a plurality" means two or more unless otherwise specified.

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.

Fig. 1 is a perspective view of an embodiment of a refrigerator according to the present invention, which has an approximately rectangular parallelepiped shape. The appearance of the refrigerator is defined by a storage chamber 101 defining a storage space, the storage chamber 101 being a cabinet 100 having an opening, and a plurality of door bodies 200 provided in the storage chamber 101, the storage chamber 101 being vertically partitioned into a lower freezing chamber 101A and an upper refrigerating chamber 101B. Each of the partitioned spaces may have an independent storage space.

In detail, the freezing chamber 101A is defined at a lower side of the storage chamber 101 and may be selectively covered by a drawer type freezing chamber door 200A. The space defined above the freezing chamber 101A is partitioned into left and right sides to define the refrigerating chamber 101B, respectively. The refrigerating compartment 101B is selectively opened or closed by a refrigerating compartment door 200B pivotably mounted on the refrigerating compartment 101B.

As shown in fig. 1, a cabinet 100 according to an embodiment of the present invention includes an inner container 110, a storage chamber 101 is formed inside the inner container 110, an air duct cover 300 is disposed inside the inner container 110, and an air duct (not shown) is formed between the air duct cover 300 and a rear wall of the inner container 110, as shown in fig. 2 and 3, an air opening 310 communicating the air duct and the storage chamber 101 is disposed on the air duct cover 300, an evaporator (not shown) is disposed in the air duct, and a defrosting device is disposed on the evaporator and used for heating and defrosting the evaporator, such as a heating wire. The cold air prepared by the evaporator enters the storage chamber 101 through the air opening 310, so that the temperature in the storage chamber 101 is reduced, and a storage space which is beneficial to food preservation is formed in the storage chamber 101.

As shown in fig. 2 and 3, a shielding plate 400 and a driving mechanism are further disposed in the air duct provided by the present application, the shielding plate 400 is movably disposed at the air port 310, the shielding plate 400 is used for opening or closing the air port 310, the driving mechanism is used for driving the shielding plate 400 to move, when the evaporator needs defrosting, as shown in fig. 2, a control unit of the refrigerator controls the defrosting device to heat to defrost the evaporator, and controls the driving mechanism to drive the shielding plate 400 to close the air port 310, and when defrosting is finished, as shown in fig. 3, the control unit controls the driving mechanism to drive the shielding plate 400 to open the air port 310.

According to the refrigerator provided by the embodiment of the invention, the shielding plate 400 is arranged in the air channel, the driving mechanism can drive the shielding plate 400 to open or close the air opening 310, when the shielding plate 400 closes the air opening 310, the air channel is isolated from the storage chamber 101, so that air in the air channel can be prevented from entering the storage chamber 101, and when the shielding plate 400 opens the air opening 310, the air channel is communicated with the storage chamber 101, so that the air in the refrigerator can flow in a normal circulation manner; compared with the prior art, the refrigerator provided by the application operates normally at the evaporator, as shown in fig. 3, the air opening 310 is opened by the shielding plate 400, cold air generated by the evaporator enters the storage chamber 101 through the air opening 310, normal operation of the refrigerator is ensured, when the evaporator is defrosted by heating of the defrosting device, as shown in fig. 2, the control unit of the refrigerator controls the driving mechanism to drive the shielding plate 400 to close the air opening 310 on the air channel cover plate 300, so that the air channel is isolated from the storage chamber 101, heat generated when the evaporator is defrosted is prevented from entering the storage chamber 101 through the air opening 310, temperature in the storage chamber 101 is prevented from fluctuating, the fresh-keeping effect of the refrigerator is ensured, after defrosting is finished, the control unit controls the driving mechanism, and the shielding plate 400 is driven to open the air opening 310.

The movement mode of the shielding plate 400 provided by the embodiment of the invention can rotate along the direction parallel to the air duct cover plate 300, that is, the shielding plate 400 is attached to the air duct cover plate 300, and when the shielding plate 400 rotates to the position corresponding to the air port 310, the air port 310 can be closed; the shielding plate 400 can also slide in the direction perpendicular to the air duct cover plate 300, when the shielding plate 400 is attached to the air duct cover plate 300, namely, the air opening 310 is closed, and when the shielding plate 400 is separated from the air duct cover plate 300, the air opening 310 is opened. Compared with a rotary motion mode, the motion mode that the shielding plate 400 slides along the direction perpendicular to the air duct cover plate 300 does not need to reserve a rotary space for the shielding plate 400 along the direction parallel to the air duct cover plate 300, so that the effective use space in an air duct is saved.

The specific structure of the shielding plate 400 provided by the embodiment of the present invention, which adopts a sliding motion mode, is as follows, as shown in fig. 4, a mounting box 500 is fixedly disposed in the air duct, the driving mechanism is disposed in the mounting box 500, the shielding plate 400 is slidably connected to the mounting box 500 through a sliding assembly, the shielding plate 400 is parallel to the air duct cover plate 300, the sliding assembly enables the shielding plate 400 to slide in a direction perpendicular to the air duct cover plate 300, when the shielding plate 400 closes the air opening 310, as shown in fig. 2, the shielding plate 400 is attached to a peripheral edge of the air opening 310 on the air duct cover plate 300, and when the shielding plate 400 opens the air opening 310, as shown in fig. 3, the shielding plate 400 is separated from the air duct cover plate 300. The mounting box 500 is fixedly arranged in the air duct, the driving mechanism is arranged in the mounting box 500, and the shielding plate 400 is slidably connected with the mounting box 500, so that the driving mechanism can drive the shielding plate 400 to slide along the direction perpendicular to the air duct cover plate 300, and the shielding plate 400 cannot move along the direction parallel to the air duct cover plate 300, so that the effective use space in the air duct can be saved.

As shown in fig. 5 and 6, the sliding assembly according to the embodiment of the present invention includes a fixing block 410 fixed on the upper portion of the shielding plate 400, the fixing block 410 extends into the mounting box 500 through an opening at the bottom of the mounting box 500, a fixing rod 420 is fixed on the fixing block 410, the fixing rod 420 is arranged along the horizontal direction and is parallel to the air duct cover plate 300, two ends of the fixing rod 420 are rotatably connected with pulleys 430, and the pulleys 430 abut against the bottom surface of the mounting box 500. The fixing rod 420 and the pulley 430 are supported inside the mounting box 500, and when the pulley 430 rolls along the bottom surface of the mounting box 500, the shielding plate 400 is driven to slide together, so that the shielding plate 400 can slide relative to the mounting box 500.

As shown in fig. 5 and 6, the driving mechanism according to the embodiment of the present invention includes a driving motor 700 fixed in an installation box 500, a gear 710 is fixedly connected to an output shaft of the driving motor 700, a rack 411 is disposed on the fixed block 410, the rack 411 is perpendicular to the air duct cover plate 300, and the gear 710 is engaged with the rack 411. When the driving motor 700 drives the gear 710 to rotate, the gear 710 drives the rack 411 to move, and since the rack 411 is perpendicular to the air duct cover plate 300, the rack 411 can drive the fixing block 410 to move in a direction perpendicular to the air duct cover plate 300, so that the shielding plate 400 can also move in a direction perpendicular to the air duct cover plate 300.

The rack 411 provided by the embodiment of the present invention may be disposed on the sidewall of the fixed block 410 perpendicular to the air duct cover plate 300, or may be disposed on the top surface of the fixed block 410, and compared with the rack 411 disposed on the sidewall of the fixed block 410, the rack 411 is disposed on the top surface of the fixed block 410, so that the force applied to the fixed block 410 is more uniform, and the shielding plate 400 and the fixed block 410 are more balanced in the sliding process.

As shown in fig. 5, in order to prevent the pulley 430 from deviating during rolling, a guide portion is disposed in the mounting box 500 according to an embodiment of the present invention, and the guide portion can enable the pulley 430 to roll in a direction perpendicular to the air duct cover 300. The guide portion limits the rolling direction of the pulley 430, so that the shutter 400 can be ensured to slide in a direction perpendicular to the duct cover 300.

As shown in fig. 5, the guide portion provided in the embodiment of the present invention includes two bosses 510, the two bosses 510 are disposed corresponding to the two pulleys 430, a surface of the boss 510 facing the corresponding pulley 430 is a guide surface 511, the guide surface 511 is perpendicular to the bottom surface of the mounting box 500 and perpendicular to the air duct cover plate 300, and a side surface of the pulley 430 is attached to the corresponding guide surface 511. Since the guide surface 511 is perpendicular to the bottom surface of the mounting box 500 and perpendicular to the duct cover 300, the side surface of the pulley 430 and the corresponding guide surface 511 are attached to each other, so that the pulley 430 can roll along the extending direction of the guide surface 511, i.e. the direction perpendicular to the duct cover 300, thereby ensuring that the pulley 430 does not deviate during the rolling process.

In order to further ensure that the shielding plate 400 slides in a direction perpendicular to the air duct cover plate 300, as shown in fig. 5 and 6, two bosses 510 provided in the embodiment of the present invention are disposed between two pulleys 430, a positioning rod 440 is fixed on the shielding plate 400, the positioning rod 440 is parallel to the fixing rod 420, sliding grooves 512 are disposed on opposite surfaces of the two bosses 510, a length direction of the sliding groove 512 is perpendicular to the air duct cover plate 300, and two ends of the positioning rod 440 are respectively inserted into the corresponding sliding grooves 512. The positioning rod 440 slides along the sliding groove 512, so that the rolling direction of the pulley 430 is further limited, and the pulley 430 is prevented from being deviated in the rolling process.

In some embodiments, as shown in fig. 5, 6, and 9, the mounting box 500 is provided with a limiting plate 520 on two opposite sidewalls perpendicular to the fixing rod 420, the limiting plate 520 is horizontally disposed and perpendicular to the air duct cover plate 300, and the pulley 430 is disposed between the limiting plate 520 and the bottom surface of the mounting box 500. Through the limiting plate 520 that sets up in the mounting box 500, make pulley 430 set up between the bottom surface of limiting plate 520 and mounting box 500 to when avoiding driving motor 700 drive gear 710 to drive rack 411 to move, because the frictional resistance between locating lever 440 and the sliding tray 512, lead to the shielding plate 400 whole to rotate around locating lever 440, make pulley 430 and mounting box 500's bottom surface separation, further lead to rack 411 and gear 710 to block each other extremely, make the condition emergence that actuating mechanism can not normal operating.

For convenience of installation, as shown in fig. 5 and 7, the installation box 500 provided by the embodiment of the present invention includes a left housing 540 and a right housing 550, the left housing 540 and the right housing 550 are fastened to each other, a notch is provided on an edge of a bottom surface of the left housing 540 close to the right housing 550 and an edge of a bottom surface of the right housing 550 close to the left housing 540, after the left housing 540 and the right housing 550 are fastened to each other, the two notches form the opening together, and one of the two protrusions is provided in the left housing 540, the other is provided in the right housing 550, and the left housing 540 and the right housing 550 are detachably connected to each other, so as to facilitate installation of components such as the driving motor 700.

The connection mode between the left shell 540 and the right shell 550 provided by the embodiment of the invention can adopt clamping connection and also can adopt screw connection, and compared with the clamping connection mode, the screw connection can ensure that the connection between the left shell 540 and the right shell 550 is more stable.

For convenience of installation, as shown in fig. 5, 7 and 8, two opposite side walls of the installation box 500 perpendicular to the fixing rod 420 are respectively provided with an installation opening 530 for installing the pulley 430, and the installation openings 530 are disposed between the bottom surface of the installation box 500 and the limiting plate 520. Through set up installing port 530 on the lateral wall at mounting box 500, all be provided with installing port 530 on the lateral wall of left casing 540 and right casing 550 promptly to can install pulley 430 from the lateral wall department of left casing 540 and right casing 550, avoid from left casing 540 and right casing 550 the centre to when inside installation pulley 430, arch and limiting plate 520 hinder pulley 430's installation, be favorable to reducing the installation degree of difficulty.

As shown in fig. 5, 7, and 8, the mounting opening 530 is used to mount the pulley 430 in the mounting box 500, and in order to reduce the mounting difficulty, after the pulley 430 is mounted in the mounting box 500 through the mounting opening 530, the side surface of the pulley 430 is attached to the guide surface 511 on the protrusion in the mounting box 500, and can roll in the direction perpendicular to the air duct cover plate 300, and the pulley 430 is not disposed at the mounting opening 530.

In this application, as shown in fig. 5, fig. 7, fig. 8, the concrete structure of installing port 530 does, and the part between the bottom surface of limiting plate 520 and mounting box 500 all sets up to installing port 530, and the part that lies in between the bottom surface of limiting plate 520 and mounting box 500 on the lateral wall of mounting box 500 does not all set up the lateral wall promptly, forms promptly installing port 530 compares in seting up specific installing port 530 structure, is favorable to reducing the processing degree of difficulty.

In order to improve the sealing effect when the shielding plate 400 closes the air inlet 310, as shown in fig. 10, a sealing ring 600 is disposed on a surface of the shielding plate 400 facing the air duct cover plate 300 according to the embodiment of the present invention, and when the shielding plate 400 closes the air inlet 310, the sealing ring 600 is in pressing contact with the air duct cover plate 300. Through setting up a sealing washer 600 on shielding plate 400, when shielding plate 400 closed wind gap 310, make sealing washer 600 extrusion set up between shielding plate 400 and wind channel apron 300 to improve the sealing performance between shielding plate 400 and the wind channel apron 300, isolated wind channel and storeroom 101 more effectively avoids hot-air admission storeroom 101.

As shown in fig. 12 and 13, the sealing ring 600 according to an embodiment of the present invention includes a sealing portion 610, a connecting portion 620, and a fastening portion 630, wherein the sealing portion 610 is disposed on a surface of the connecting portion 620 facing the air duct cover plate 300, the sealing portion 610 is disposed on an inner side edge of the connecting portion 620 and extends toward an outer side edge of the connecting portion 620, a cross section of the sealing portion 610 is arc-shaped, a concave surface of the sealing portion faces the connecting portion 620, and when the shielding plate 400 closes the air opening 310, the sealing portion 610 is in pressing contact with the air duct cover plate 300. Through setting up sealing portion 610 to the cambered surface, make the space have between sealing portion 610 and the connecting portion 620, when shutter 400 closed wind gap 310, sealing portion 610 is extrudeed, because sealing portion 610 and the connecting portion 620 between have the space, therefore, sealing portion 610 has great deformation space, be favorable to sealing portion 610 and the inseparable laminating of wind channel apron 300, thereby can improve sealing performance, and sealing portion 610 has the inboard border of connecting portion 620 to extend to outside border, thereby can avoid sealing portion 610 and the part department that connecting portion 620 is located the downside to form the recess, can avoid producing the condition such as ponding icing.

In addition, as shown in fig. 11, 12, and 13, the clamping portion 630 is disposed on a surface of the connecting portion 620 facing the shielding plate 400, a clamping hole 450 is formed in an edge of the shielding plate 400, and the clamping portion 630 is clamped in the clamping hole 450. With the whole joint hole 450 department of passing through joint portion 630 joint on shielding plate 400 of sealing washer 600, convenient to detach is convenient for wash or change sealing washer 600.

It should be noted that the number and the positions of the locking portions 630 and the locking holes 450 are uniformly and correspondingly arranged, so as to ensure that the sealing ring 600 and the shielding plate 400 are locked with each other.

In some embodiments, when the evaporator is defrosting, since the hot air in the air duct may cause condensed water, therefore, a part of the condensed water may also be generated in the mounting box 500, in order to prevent the condensed water inside the mounting box 500 from condensing into ice after defrosting is finished, as shown in fig. 7, fig. 8, and fig. 9, a plurality of drainage holes 560 are provided on the bottom surface of the mounting box 500 provided by the present application, and the condensed water inside the mounting box 500 may be drained through the drainage holes 560, so that accumulated water in the mounting box 500 is avoided, and further freezing in the mounting box 500 may be avoided.

In some embodiments, in order to further prevent water from accumulating in the mounting box 500, the bottom surface of the mounting box 500 may be inclined at a certain angle, specifically, the structures of the left housing 540 and the right housing 550 are symmetrical to each other, and taking the left housing 540 as an example, the portions of the bottom surface of the left housing 540 on both sides of the protrusion are respectively inclined downward, that is, the side near the protrusion is higher than the side far from the protrusion, so that the condensed water inside the mounting box 500 is discharged from the edges of both sides.

In some embodiments, the bottom plate of the mounting box 500 may be integrally provided with an inclined structure, or the bottom surface of the mounting box 500 may be inclined by gradually reducing the thickness of the bottom plate, and thus, the specific structure thereof is not limited in this application.

In some embodiments, in order to improve defrosting efficiency, as shown in fig. 7, 8, and 9, a plurality of ventilation holes 570 may be formed in each of the side walls and the top surface of the mounting case 500, so as to improve an air circulation speed inside the mounting case 500, and when the evaporator defrosts, hot air can be quickly circulated inside the mounting case 500, so that frost condensed inside the mounting case 500 is quickly melted, and condensed water is discharged through the slope on the bottom surface and the water discharge hole 560.

In some embodiments, in order to make the air flow smoothly inside the mounting box 500, a certain gap may be left between the mounting box 500 and the top surface of the inner container 110, so that the air can enter the inside of the mounting box 500 through the ventilation hole 570 at the top of the mounting box 500, and then flow out of the drainage hole 560 at the bottom surface of the mounting box 500, thereby the air circulation is more smooth, which is beneficial to further improving the defrosting efficiency inside the mounting box 500.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

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:

an inner container, inside which a storage chamber is formed;

the defrosting device is used for heating and defrosting the evaporator;

the driving mechanism is used for driving the shielding plate to move;

2. The refrigerator as claimed in claim 1, wherein a mounting box is fixedly disposed in the air duct, the driving mechanism is disposed in the mounting box, the shielding plate is slidably connected to the mounting box through a sliding assembly, the shielding plate is parallel to the air duct cover plate, the sliding assembly enables the shielding plate to slide in a direction perpendicular to the air duct cover plate, when the shielding plate closes the air opening, the shielding plate is attached to a peripheral edge of the air opening in the air duct cover plate, and when the shielding plate opens the air opening, the shielding plate is separated from the air duct cover plate.

3. The refrigerator as claimed in claim 2, wherein the sliding assembly includes a fixing block fixed on the upper portion of the shielding plate, the fixing block extends into the mounting box from the opening at the bottom of the mounting box, a fixing rod is fixed on the fixing block, the fixing rod is horizontally arranged and parallel to the air duct cover plate, pulleys are rotatably connected to both ends of the fixing rod, and the pulleys abut against the bottom surface of the mounting box.

4. The refrigerator according to claim 3, wherein a guide portion is provided in the mounting box, and the guide portion allows the pulley to roll in a direction perpendicular to the air duct cover plate.

5. The refrigerator according to claim 4, wherein the guide portion includes two bosses corresponding to the two pulleys, a surface of each boss facing the corresponding pulley is a guide surface perpendicular to the bottom surface of the mounting box and perpendicular to the air duct cover plate, and a side surface of each pulley is attached to the corresponding guide surface.

6. The refrigerator as claimed in claim 5, wherein two of the bosses are disposed between the two pulleys, a positioning rod is fixed on the shielding plate, the positioning rod is parallel to the fixing rod, sliding grooves are disposed on opposite surfaces of the two bosses, a length direction of the sliding grooves is perpendicular to the air duct cover plate, and two ends of the positioning rod are inserted into the corresponding sliding grooves respectively.

7. The refrigerator as claimed in claim 6, wherein a limiting plate is disposed on each of two opposite sidewalls of the mounting box perpendicular to the fixing rod, the limiting plates are disposed along a horizontal direction and perpendicular to the air duct cover plate, and the pulley is disposed between the limiting plate and the bottom surface of the mounting box.

8. The refrigerator as claimed in claim 7, wherein the mounting box has two opposite sidewalls perpendicular to the fixing rod, and each of the two sidewalls has a mounting opening for mounting the pulley, and the mounting openings are disposed between the bottom surface of the mounting box and the limiting plate.

9. The refrigerator according to any one of claims 1 to 8, wherein a sealing ring is provided on a surface of the shielding plate facing the air duct cover plate, and the sealing ring is in pressing contact with the air duct cover plate when the air opening is closed by the shielding plate.

10. The refrigerator according to claim 9, wherein the sealing ring includes a sealing portion, a connecting portion and a clamping portion, the sealing portion is disposed on a face of the connecting portion facing the air duct cover plate, the clamping portion is disposed on a face of the connecting portion facing the shielding plate, a clamping hole is disposed at an edge of the shielding plate, the clamping portion is clamped in the clamping hole, the sealing portion is disposed on an inner side edge of the connecting portion and extends to an outer side edge of the connecting portion, a cross section of the sealing portion is arc-shaped, a concave surface of the sealing portion faces the connecting portion, and when the shielding plate closes the air opening, the sealing portion is in pressing contact with the air duct cover plate.