CN107202465A - Refrigerator - Google Patents

Abstract

The invention provides a kind of refrigerator, including：Air channel backboard；Blower fan, is installed on the rear wall of inner bag and flatly stretches to the first air outlet, and blower fan is configured to promote the cold wind in evaporator room to flow into storing compartment via the first air outlet；With return air cover plate, extend along the longitudinal direction, and the front portion of return air cover plate has at least one air inlet, the rear portion of return air cover plate has at least one air outlet, and return air cover plate connects at least one air inlet and the return air channel of at least one air outlet with the bottom wall formation of inner bag；At least one air outlet is connected with evaporator room, so that fraction indoor between storing flows into return air channel via at least one air inlet, then flows back to the evaporator room via at least one air outlet.The present invention can reduce the vibrations of blower fan in refrigerator, so as to reduce the noise of refrigerator, and improve the flow area of indoor air flow between the storing of refrigerator, and then improve the uniformity of indoor temperature distribution between storing, realize comprehensive refrigeration, and then lift refrigeration.

Description

refrigerator

technical field

The invention relates to the field of refrigerated and frozen storage, in particular to a refrigerator.

Background technique

Refrigerators are indispensable household appliances in people's daily life. In recent years, air-cooled refrigerators have become more and more popular, and their features such as automatic defrosting, fast cooling speed, uniform distribution of air-conditioning, precise temperature control, and no odor transmission have been recognized by the majority of users. Existing air-cooled refrigerators are generally provided with an air duct backboard at the rear of the liner, the front of the air duct backboard is a storage compartment, and the rear of the air duct backboard is an evaporator room. In addition, a plurality of air supply ports and a plurality of return air ports are set on the back panel of the air duct, so that the cold air in the evaporator room can flow into the storage room through the plurality of air supply ports, and exchange heat with the storage in the storage room. Then it flows back to the evaporator chamber through multiple return air outlets, thereby realizing the circulation of the air flow.

However, in this way, the airflow flowing from multiple air outlets to the storage compartment cannot completely flow to the front of the storage compartment, so that most of the airflow flows downward at the rear of the storage compartment, and then flows from multiple air outlets to the storage compartment. The air return port flows back to the evaporator room, and the circulation area is very small, which makes the cold distribution of the whole storage room uneven, that is, the temperature of the front and rear parts of the storage room is not equal, which is not conducive to the storage of food. In addition, this method will make the airflow that has just flowed from the multiple air outlets to the storage compartment relatively cold, and the temperature of the airflow will be relatively high after flowing downward and exchanging heat with part of the storage, thereby making the storage compartment The uneven temperature distribution in the vertical direction is also not conducive to the storage of food.

And, the composition of the refrigerating air channel of existing air-cooled refrigerator is generally made up of front and rear air channel cover plates and the air channel formed by foam, fan etc., and fan is installed on the air channel cover plate. Because the air duct back panel is light and not stable enough, this method causes the fan to drive the air duct back panel to vibrate when it rotates, resulting in a certain amount of noise, which is not conducive to the quietness of the refrigerator, especially at night, which has a certain impact on the user's rest. influences. In addition, based on the structure of the existing air duct back panel and fan, it is generally necessary to install a glass tube defrosting heating wire under the evaporator. This method is costly, and the assembly is relatively complicated, and the defrosting effect is mediocre.

Contents of the invention

In view of the above problems, the present invention is proposed to provide a refrigerator that solves the above problems or at least partially solves the above problems.

One object of the present invention is to reduce the vibration of the fan in the refrigerator, thereby reducing the noise of the refrigerator.

Another object of the present invention is to reduce the cost of the refrigerator and facilitate its installation.

Another object of the present invention is to increase the flow area of the airflow in the storage room of the refrigerator in the front and rear directions, thereby improving the uniformity of temperature distribution in the storage room.

Another object of the present invention is to realize all-round cooling in the storage compartment of the refrigerator, thereby improving the cooling effect.

In particular, the present invention provides a refrigerator, including an inner container, and the refrigerator also includes:

The air duct backboard is arranged in the inner tank, and the air duct backboard and the inner tank define a storage compartment in front of the air duct backboard and a storage compartment behind the air duct backboard. The evaporator room; the air duct back panel is provided with a plurality of first air supply ports for the cold air in the evaporator room to flow into the storage compartment;

A fan is installed on the rear wall of the inner container and extends horizontally toward the first air supply port, and the fan is configured to promote the cold air in the evaporator chamber to flow into the storage room through the first air supply port room; and

The return air cover extends along the front and rear directions and is arranged in the storage compartment, and the front part of the return air cover has at least one air inlet, and the rear part of the return air cover has at least one air outlet, The air return cover plate and the bottom wall of the liner form a return air channel communicating with at least one air inlet and at least one air outlet; at least one air outlet communicates with the evaporator chamber, so that Part of the airflow in the storage compartment flows into the return air channel through at least one of the air inlets, and then flows back into the evaporator chamber through at least one of the air outlets.

Optionally, the fan extends into the first air supply port.

Optionally, the refrigerator further includes: a rectifying plate, arranged in front of the first air supply port and parallel to the rear wall of the liner, so that the airflow blowing towards the rectifying plate is blocked by the rectifying plate, It then flows from around the fairing to the storage compartment.

Optionally, the refrigerator further includes: a plurality of installation columns, each of the installation columns extends along the front-to-back direction, and the front end of each of the installation columns is connected to the rear surface at the corner of the rectifying plate, each The rear end of the mounting column is connected to the front surface of the air duct backboard.

Optionally, the refrigerator further includes: a foam board, attached to the rear surface of the air channel backboard, and the foam board is provided with a second air supply port that conforms to the shape of the first air supply port. The cold air in the evaporator chamber flows into the storage compartment through the second air supply opening and the first air supply opening in sequence.

Optionally, the fan includes: a bracket, the rear end of which has a flat-plate mounting portion, and the mounting portion is closely mounted on the rear wall of the inner container; a wind wheel is rotatably arranged at the front end of the bracket , and the pivot axis of the wind wheel extends along the front-to-back direction; the wind wheel is located in the first air supply port and the second air supply port.

Optionally, at least one of the air inlets is opened at the front of the return air cover.

Optionally, the air return cover plate includes a cover plate portion, and an upwardly protruding air inlet portion is provided on the front portion of the cover plate portion, and the air inlet portion includes a top wall, two side walls, a front wall and The rear wall, and the projection of the air inlet on a plane perpendicular to the transverse direction is trapezoidal; at least one of the air inlets is opened on the air inlet.

Optionally, at least one of the air inlets includes a first air inlet, the first air inlet is opened on the front wall of the air inlet part, and the first air inlet is elongated and extends laterally; And at least one of the air inlets further includes a plurality of second air inlets, and the plurality of second air inlets are opened on the rear wall of the air inlet part and arranged in a transverse direction.

Optionally, the number of the air outlet is one; the rear edge of the cover part and the bottom wall of the liner form the air outlet, and the upper surface of the rear part of the cover part abuts against The lower edge of the air duct backboard.

In the refrigerator of the present invention, the first air supply port for the cold air in the evaporator room to flow into the storage compartment is opened on the air duct back panel, and the fan is installed on the rear wall of the inner container and extends horizontally to the first air supply port, which can promote evaporation. The cold air in the appliance chamber flows into the storage compartment through the first air supply port. That is to say, in the refrigerator of the present invention, the fan is installed on the rear wall of the inner container, and the first air supply port is opened at the corresponding position of the air duct back plate, so that the cold air in the evaporator room passes through the first air supply port under the action of the fan. Blowing into the storage compartment replaces the existing method of directly installing the fan on the back panel of the air duct, which can effectively reduce the vibration of the fan when the refrigerator is working, thereby reducing the noise of the refrigerator. Moreover, this structure is easy to assemble and has low cost. And, because the refrigerator also includes a return air cover plate, the front portion of the return air cover plate has at least one air inlet, and the rear portion of the return air cover plate has at least one air outlet, and the return air cover plate communicates with the bottom wall of the inner container by at least One air inlet and at least one air outlet return air passage, and at least one air outlet communicates with the evaporator chamber, so that part of the airflow in the storage room can flow into the return air passage through at least one air inlet, and then flow through at least one air outlet. Return to the evaporator chamber. By arranging the return air cover plate, the airflow at the front of the storage room can be circulated with the evaporator room, thereby avoiding the temperature difference between the front and rear of the storage room, which is beneficial to the storage of food. In addition, because the rear end of the return air cover is close to the back panel of the air duct, the return air cover itself is relatively cold, and the cooling capacity of the return air cover can be used to cool the storage from below, thereby making the storage room of the refrigerator indoor. All-round refrigeration, thereby improving the cooling effect.

Further, because the refrigerator also includes a rectifying plate, the rectifying plate is arranged in front of the first air supply port and parallel to the rear wall of the inner container, so that the airflow blowing to the rectifying plate is blocked by the rectifying plate, and then flows from around the rectifying plate to the storage. Room. Because the refrigerator of the present invention is provided with a rectifying plate, the cold wind can be evenly blown to the storage compartment, the temperature consistency of the storage compartment is improved, and the cold wind can be avoided from directly blowing to the storage compartment, that is, the cold wind is prevented from directly blowing to the storage compartment. Blowing the storage affects the preservation of the storage.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

FIG. 1 is a schematic partial structural view of a refrigerator according to an embodiment of the present invention; and

Fig. 2 is a schematic partial cross-sectional view of the refrigerator shown in Fig. 1 .

detailed description

Fig. 1 is a schematic partial structural diagram of a refrigerator according to an embodiment of the present invention. As shown in FIG. 1 to FIG. 2 , an embodiment of the present invention provides a refrigerator, which may include an inner container 100 , and the refrigerator may be an air-cooled refrigerator. In particular, the refrigerator may further include an air channel backboard 200 and a fan 500 . Wherein, the air channel backboard 200 can be arranged in the inner tank 100, and the air channel back panel 200 and the inner tank 100 define the storage compartment 300 located in front of the air channel back panel 200 and the evaporator located behind the air channel back panel 200. The room 400 and the storage room 300 can be used to store food and other storage items. An evaporator is installed in the evaporator room 400 to provide cooling airflow for the storage room 300. Those skilled in the art should understand that the storage room 300 Generally, it is the freezer compartment of the refrigerator. The air duct back panel 200 can be provided with a first air supply port 210 for the cold air in the evaporator chamber 400 to flow into the storage compartment 300, and the lower part of the air duct back panel 200 can be provided with a back flow of the air flow from the storage compartment 300 to the evaporator compartment. A plurality of return air outlets of the device chamber 400. In this way, the cold air in the evaporator chamber 400 can flow into the storage compartment 300 through multiple air supply ports, exchange heat with the storage in the storage compartment 300, and then flow back to the evaporator chamber 400 through multiple air return ports. Thus realizing the circulation of air flow. The fan 500 may be installed on the rear wall of the inner container 100 and extend horizontally toward the first air outlet 210 , and the fan 500 is configured to force the cold air in the evaporator chamber 400 to flow into the storage compartment 300 through the first air outlet 210 . That is to say, in the refrigerator of this embodiment, the fan 500 is installed on the rear wall of the inner container 100, and the first air supply port 210 is opened on the air duct back plate 200 corresponding to the fan 500, so that the inside of the evaporator chamber 400 Under the action of the fan 500, the cold air is blown into the storage compartment 300 through the first air outlet 210, replacing the existing method of directly installing the fan 500 on the air duct back panel 200, which can effectively reduce the fan temperature when the refrigerator is working. 500 vibration, which reduces the noise of the refrigerator. Moreover, this structure is easy to assemble and has low cost. In addition, the structure of this embodiment can omit the glass tube defrost heating wire normally attached under the evaporator, and replace it with a common defrost heating wire with a gallbladder, which is not only simple in structure and easy to install, but also makes the defrosting effect more effective obvious.

Further, the refrigerator of this embodiment may further include a return air cover 600, which extends along the front and rear directions and is disposed in the storage compartment 300, and the front of the return air cover 600 may have at least one air inlet 610, and the return air The rear of the air cover 600 may have at least one air outlet 620 , and the return air cover 600 and the bottom wall of the liner 100 form a return air channel 630 that can communicate with at least one air inlet 610 and at least one air outlet 620 . At least one air outlet 620 communicates with the evaporator chamber 400 , so that part of the airflow in the storage compartment 300 flows into the return air channel 630 through the at least one air inlet 610 , and then flows back to the evaporator chamber 400 through the at least one air outlet 620 . In this embodiment, part of the airflow at the front of the storage compartment 300 can flow back to the evaporator chamber 400 through the air return channel 630, and then participate in the airflow circulation between the evaporator chamber 400 and the storage compartment 300, avoiding the air flow from multiple air supply ports. The airflow flowing to the storage compartment 300 flows down along the back of the storage compartment 300 and flows back to the evaporator chamber 400, resulting in a small circulation area and no interaction between front and rear airflows, making the cooling of the entire storage compartment 300 The food is distributed more evenly in the front and rear directions, even if the temperature of the front and rear of the storage compartment 300 is as consistent as possible, which is beneficial to the storage of food. In addition, because the rear end of the return air cover 600 in this embodiment is close to the air duct back plate 200, the return air cover 600 itself is relatively cold, and the cooling capacity of the return air cover 600 can be used to cool the storage from below to avoid The uneven vertical temperature distribution caused by the air flow in the storage compartment 300 from top to bottom is eliminated, so that the storage compartment 300 of the refrigerator can realize all-round cooling, thereby improving the cooling effect.

As shown in Figure 2, in some embodiments of the present invention, the fan 500 can extend into the first air supply port 210, that is, the rear end of the fan 500 is fixed on the rear wall of the inner container 100, and the front end extends to the first air supply port 210 Inside. The fan 500 in this embodiment can be understood as driving the cold air in the evaporator chamber 400 to flow into the storage compartment 300 at the first air supply port 210, so that compared with the fan 500 located behind the first air supply port 210, the evaporator chamber 400 is less likely to be damaged. The airflow inside is turbulent. In some alternative embodiments, the front of the fan 500 may be located behind the first air supply port 210 , that is, the fan 500 is arranged opposite to the first air supply port 210 with a certain distance.

As shown in FIG. 1 and FIG. 2 , in some embodiments of the present invention, the refrigerator may further include a rectifying plate 700 . The rectifying plate 700 can be arranged in front of the first air outlet 210 and parallel to the rear wall of the inner container 100, so that the airflow blowing to the rectifying plate 700 is blocked by the rectifying plate 700, and then flows from the surrounding of the rectifying plate 700 to the storage compartment 300 . Because the refrigerator of this embodiment is provided with the rectifying plate 700, it can prevent the cold air flowing out from the first air supply port 210 from blowing directly to the storage compartment 300. Because the food is easily lost in water when it is blown directly, this embodiment can keep the storage as much as possible. Fresh. Moreover, the rectifying plate 700 can evenly blow cold air to the storage compartment 300 along the periphery of the rectifying plate 700, which improves the temperature consistency of the storage compartment 300, thereby improving the cooling effect and freshness preservation quality. In some implementations, the rectifying plate 700 can be in a square shape, and of course it can also be in other shapes such as a circle. The first air supply port 210 can be circular, and the projection of the rectifying plate 700 on a plane perpendicular to the front-to-back direction covers the first air supply port 210, that is, the rectification plate 700 should completely prevent the cold air blown from the first air supply port 210 in the front-rear direction. In this way, the rectifying effect of the rectifying plate 700 can be improved. In some other embodiments, the refrigerator may further include a plurality of mounting columns 800 . Each mounting column 800 can extend along the front-to-back direction, and the front end of each mounting column 800 is connected to the rear surface at the corner of the rectifying plate 700 , and the rear end of each mounting column 800 is connected to the front surface of the air duct backplane 200 . Preferably, the number of mounting posts 800 is four, which are respectively located at four corners of the square rectifying plate 700 . Moreover, the four mounting columns 800 can be elastic, so that when the cold wind blows to the rectifying plate 700, the shock absorption effect is good and the noise is low.

In order to improve the rectifying effect of the rectifying plate 700, in some embodiments of the present invention, a plurality of ribs extending from the center to the surroundings may be provided on the rear surface of the rectifying plate 700, and a gap may be defined between every two ribs. flow channel, so that the cold wind blocked by the rectifying plate 700 can flow to the surroundings of the rectifying plate 700 according to the directions of different flow channels as much as possible, so as to avoid the disorder of the cold air flow as much as possible.

In some embodiments of the present invention, the first air supply port 210 can be set on the upper part of the air duct back plate 200, at least one air return port can be opened on the lower part of the air duct back plate 200, and the evaporator can be arranged on the lower part of the evaporator chamber 400 And it is located below the fan 500 . This embodiment realizes that the airflow in the lower part of the evaporator chamber 400 flows upward after being cooled by the evaporator, and flows to the storage compartment 300 through the first air supply port 210 under the action of the fan 500, and the airflow in the storage compartment 300 passes through at least A return air port flows back to the evaporator of the evaporator chamber 400 to realize the circulation of the air flow. In some embodiments, the distance between the first air outlet 210 and the top wall of the inner container 100 may be 1/3 to 1/2 of the distance between the first air outlet 210 and the bottom wall of the inner container 100, and the diameter of the first air outlet 210 may be 1/5 to 1/3 of the height of the backboard 200. In some other embodiments, there may be multiple return air outlets. As shown in FIG. 2 , for example, a plurality of return air outlets are located at the lower part of the air duct back panel 200 and can be arranged in two horizontal rows. In some embodiments, the air duct back panel 200 may have a baffle extending backward from its rear surface and then extending downward to block at least one air return port, and the baffle can prevent air from flowing back to the evaporator chamber 400 from the return air port. The hotter air flows upward quickly, so that the air flows to the bottom of the evaporator under the action of the baffle, and then can fully exchange heat with the evaporator.

In some embodiments of the present invention, the refrigerator may further include a foam board 900 . The foam board 900 can be attached to the rear surface of the air duct back panel 200, and the foam board 900 can be provided with a second air supply port 910 that is conformed to the first air supply port 210, so that the cold air in the evaporator chamber 400 can pass through in turn. The second air outlet 910 and the first air outlet 210 flow into the storage compartment 300 . The foam board 900 of this embodiment can isolate the heat transfer between the evaporator chamber 400 and the storage compartment 300 as far as possible, and is beneficial to the stability of the air duct back panel 200 . In some embodiments, the foam board 900 may have an arc-shaped protrusion extending backward from the upper edge of the second air outlet 910 to block the air flow from below the fan 500 to the fan 500 from flowing upwards, that is, to prevent the air flow from the fan 500 The cold air flowing down to the fan 500 flows upward and is blown to the storage compartment 300 through the first air outlet 210 as much as possible, which can avoid the turbulence of the airflow in the evaporator chamber 400 as much as possible, and is conducive to the circulation of the airflow. Of course, the arc-shaped protrusions can also be specifically set according to the specific air flow direction and the structure of the air duct back plate 200 .

In some embodiments of the present invention, the wind turbine 500 may include a bracket 510 and a wind wheel 520 . The rear end of the bracket 510 may have a flat mounting portion, and the mounting portion may be snugly mounted on the rear wall of the inner container 100 . Specifically, the bracket 510 may include a prism-shaped support portion and a mounting plate extending vertically from the periphery of the support portion, and the mounting plate may be rigidly fixed on the rear wall of the inner container 100 by screws. The wind wheel 520 is rotatably disposed at the front end of the bracket 510 , that is, installed at the front end of the support portion, and the pivot axis of the wind wheel 520 extends along the front-to-back direction. The wind wheel 520 can be located in the first air outlet 210 and the second air outlet 910 . In some embodiments, the refrigerator can also include shock absorbing pads, which can be made of elastic materials, such as rubber materials, which can be arranged between the mounting part of the bracket 510 and the rear wall of the inner container 100 to reduce the rotation of the fan 500. The vibration of the inner tank 100 can further reduce the noise.

As shown in FIG. 2 , in some embodiments of the present invention, the refrigerator may further include an evaporator, a first heating wire, and a second heating wire. Wherein, the evaporator can be disposed in the evaporator chamber 400 to provide cooling capacity for the storage compartment 300 . The first heating wire can be disposed in the evaporator chamber 400 and in front of the evaporator for melting frost on the evaporator, and the first heating wire can be multi-folded and located in the same plane perpendicular to the front-to-back direction. The second heating wire can be arranged above the bottom wall of the inner container 100, and is used to melt the frost around the drain opening opened by the bottom wall of the inner container 100, and the second heating wire can also be in a multi-fold shape, surrounding the drain outlet . Moreover, both the first heating wire and the second heating wire include a heating core and a protective cover wrapped around the heating core. The protective cover can be used to prevent the frost on the evaporator or around the drain from soaking the heating core after melting and causing safety hazards. The refrigerator of this embodiment does not need to be equipped with additional equipment to prevent the heating core from being soaked by defrosting water, that is, the way of wrapping the heating core with a protective cover replaces the original glass tube heating core or steel pipe heating core hanging under the evaporator, and It is necessary to install a water baffle above the glass tube heating core or steel pipe heating core, which greatly simplifies the defrosting structure, facilitates installation, and reduces costs. At the same time, because the first heating wire is closer to the evaporator, the defrosting effect can be effectively improved .

Furthermore, the original defrosting method of the glass tube heating core or steel pipe heating core suspended below the evaporator generally does not set a special defrosting structure at the drain port on the upper surface of the inner tank 100, because the drain port needs to drain water, so the glass There should be a certain distance between the pipe heating core or the steel pipe heating core and the drain port to facilitate the discharge of defrosting water. However, although this structure does not affect the discharge of defrosting water, it cannot effectively melt the frost on the upper surface of the inner tank 100 especially near the drain because the glass tube heating core or the steel pipe heating core is far away from the drain. In this embodiment, on the basis of changing the original defrosting structure, a second heating wire is additionally provided on the upper surface of the inner tank 100, which can defrost the evaporator and drain water on the upper surface of the bottom wall of the inner tank 100 at the same time. Defrost is carried out at the mouth, which improves the defrosting effect.

As shown in FIG. 2 , in some embodiments of the present invention, at least one air inlet 610 may be opened at the front of the return air cover 600 . In some implementations, there may be one air inlet 610 , which may be elongated and extend in the transverse direction. In some other embodiments, the number of air inlets 610 may be multiple, and they may be arranged in a horizontal direction. In some alternative embodiments, there may be one air inlet 610 , which may be formed by the front edge of the return air cover 600 and the bottom wall of the inner container 100 .

As shown in FIG. 2 , in some embodiments of the present invention, the return air cover 600 may include a cover part 640 and an air inlet part 650 , the cover part 640 extends horizontally, and is used to define with the bottom wall of the inner tank 100 . Out of the return air passage 630 , the air inlet portion 650 is used for airflow to enter the return air passage 630 . Wherein, the front portion of the cover plate portion 640 can be provided with an upwardly protruding air inlet portion 650, the air inlet portion 650 can include a top wall, two side walls, a front wall and a rear wall, and the air inlet portion 650 is perpendicular to the lateral direction. The projection on the plane of is trapezoidal. That is to say, the top wall extends along the horizontal plane, the two side walls extend vertically, the front wall and the rear wall extend obliquely respectively, and the distance between the tops of the front wall and the rear wall is smaller than the distance between the bottoms. At least one air inlet 610 can be opened on the air inlet 650 . In this embodiment, the air inlet 610 is provided in the air inlet 650, so that the air inlet 610 and the airflow of the storage compartment 300 have a larger contact area, and then the airflow at the front of the storage compartment 300 can pass through the air inlet more easily. 610 flows into the return air passage 630, and at the same time, more options can be provided for the opening of the air inlet 610. In some embodiments, at least one air inlet 610 may include a first air inlet 611, the first air inlet 611 may be opened on the front wall of the air inlet 650, and the first air inlet 611 may be elongated and transversely extend. In other embodiments, at least one air inlet 610 may further include a plurality of second air inlets 612 , and the plurality of second air inlets 612 may be opened on the rear wall of the air inlet 650 and arranged in a transverse direction.

In some embodiments of the present invention, the distance between the front edge of the return air cover 600 and the front edge of the bottom wall of the inner container 100 may be 1/ of the distance between the front edge of the return air cover 600 and the air duct back plate 200 4 to 3/4, preferably 1/2. By setting the position of the front edge of the return air cover 600, the position of at least one air inlet 610 can be determined. If the front edge of the return air cover 600 is too far forward, at least one air inlet 610 will be located at the front of the storage compartment 300 , and the airflow in the middle of the storage compartment 300 cannot flow into the return air passage 630 . If the front edge of the return air cover 600 is too far behind, it is not conducive to the air circulation at the front of the storage compartment 300 . In this embodiment, the airflow at the front of the storage compartment 300 can flow into the air return channel 630 through at least one air inlet 610 to the maximum extent, thereby improving the circulation efficiency of the airflow at the front of the storage compartment 300 .

In some embodiments of the present invention, the number of the air outlet 620 can be one, the rear edge of the cover part 640 can form the air outlet 620 with the bottom wall of the inner container 100, and the upper surface of the rear part of the cover part 640 can abut against lean against the lower edge of the air duct back plate 200 . In this embodiment, it is not necessary to set or open another air outlet 620 on the cover plate portion 640, which is convenient for manufacture and installation, and at the same time, when the airflow in the return air passage 630 flows out of at least one air outlet 620, it directly flows back to the evaporator chamber 400, improving cycle efficiency.

In some embodiments of the present invention, the bottom wall of the inner container 100 in the storage compartment 300 may have a recessed portion, the return air cover 600 is disposed above the recess, and the cover portion 640 of the return air cover 600 It may be flush with the rest of the bottom wall of the liner 100 . That is to say, the return air channel 630 is located in the recessed portion, so that the return air channel 630 does not need to occupy the storage space of the storage compartment 300, thereby improving the space utilization rate, and making the inner tank 100 of the storage compartment 300 more attractive in appearance. Keep the top flat and improve the aesthetics. In some embodiments, the depth of the recessed portion (that is, the vertical thickness of the return air channel 630) can be 2 cm to 10 cm, preferably 6 cm, which can avoid excessive air accumulation in the return air channel 630, which is not conducive to air flow. flow, thereby affecting the circulation efficiency of the airflow, and it can also avoid that the return air passage 630 is too thin to make it difficult for the gas to enter or the internal flow rate is too small to affect the circulation efficiency.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. a kind of refrigerator, including inner bag, it is characterised in that the refrigerator also includes：

Air channel backboard, is arranged in the inner bag, and the air channel backboard is limited positioned at the air channel backboard with the inner bag The storing compartment in front and the evaporator room positioned at the air channel backboard rear；The air channel backboard is offered for the evaporation Cold wind in device room flows into multiple first air outlets of the storing compartment；

Blower fan, is installed on the rear wall of the inner bag and flatly stretches to first air outlet, and the blower fan is configured to promote Cold wind in the evaporator room flows into the storing compartment via first air outlet；With

Return air cover plate, extends along the longitudinal direction, is arranged at interior between the storing, and the front portion of the return air cover plate has at least One air inlet, the rear portion of the return air cover plate has at least one air outlet, the bottom wall of the return air cover plate and the inner bag Form the return air channel for connecting at least one described air inlet and at least one air outlet；At least one described air outlet with Evaporator room's connection, so that fraction indoor between the storing flows into described return via air inlet at least one described Wind passage, then flows back to the evaporator room via air outlet at least one described.

2. refrigerator according to claim 1, it is characterised in that

The blower fan is extended in first air outlet.

3. refrigerator according to claim 2, it is characterised in that the refrigerator also includes：

Cowling panel, is arranged at the first air outlet front and parallel with the rear wall of the inner bag, so as to blow to the cowling panel Air-flow stopped by the cowling panel, the storing compartment is then flowed to around the cowling panel.

4. refrigerator according to claim 3, it is characterised in that the refrigerator also includes：

Multiple mounting posts, each mounting post extends along the longitudinal direction, and front end and the rectification of each mounting post The rear surface of the corner of plate is connected, and the rear end of each mounting post is connected with the preceding surface of the air channel backboard.

5. refrigerator according to claim 4, it is characterised in that the refrigerator also includes：

Cystosepiment, is posted by the rear surface of the air channel backboard, and the cystosepiment is offered and the first air outlet profiling The second air outlet matched, for the cold wind in the evaporator room successively via second air outlet and first air-supply Mouth flows into the storing compartment.

6. refrigerator according to claim 5, it is characterised in that the blower fan includes：

Support, its rear end has plate installation portion, and the installation portion is snugly installed on the rear wall of the inner bag；

Wind wheel, is rotatablely arranged at the front end of the support, and the pivot axis of the wind wheel extends along the longitudinal direction；It is described Wind wheel is located in first air outlet and second air outlet.

7. refrigerator according to claim 1, it is characterised in that

At least one described air inlet is opened in the front portion of the return air cover plate.

8. refrigerator according to claim 7, it is characterised in that

The return air cover plate includes ceiling plate portion, and the front portion of the ceiling plate portion is provided with inlet section protruding upward, the inlet section Including roof, two side walls, antetheca and rear wall, and the inlet section is trapezoidal in the projection in horizontal plane；

At least one described air inlet is opened on the inlet section.

9. refrigerator according to claim 8, it is characterised in that

At least one described air inlet includes the first air inlet, and first air inlet is opened on the antetheca of the inlet section, And first air inlet is in strip and extends transversely；And

At least one described air inlet also includes multiple second air inlets, and multiple second air inlets are opened in the inlet section Rear wall and horizontal arranged.

10. refrigerator according to claim 9, it is characterised in that

The quantity of the air outlet is one；

The back edge of the ceiling plate portion and the bottom wall of the inner bag form the air outlet, and the upper table at the rear portion of the ceiling plate portion Face is resisted against the lower edge of the air channel backboard.