CN112129033A

CN112129033A - Water pan of refrigerator, air duct assembly of refrigerator and refrigerator

Info

Publication number: CN112129033A
Application number: CN202011017982.7A
Authority: CN
Inventors: 逯兆栋; 樊建军; 刘文信; 陈远; 李伟; 许梦琪
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2020-12-25

Abstract

The invention relates to the technical field of refrigeration, and provides a water pan of a refrigerator, an air duct assembly of the refrigerator and the refrigerator. A drip tray for a refrigerator, comprising: a cover plate body adapted to form a top air duct above the cover plate body; the water catch bowl, along the air current direction in top wind channel set up in the low reaches of apron main part, just the apron main part is connected the water catch bowl. According to the water pan of the refrigerator, the water pan comprises the cover plate main body, and the top air channel is formed above the cover plate main body, so that defrosting water falling from the evaporator during defrosting drips above the cover plate main body and then flows into the water collecting tank under the condition that the evaporator is arranged in the top air channel. Furthermore, even if ice falls, the ice cannot directly enter the water collecting tank and can be at least partially melted by the airflow in the top air duct when the ice falls above the cover plate main body, so that the possibility that the ice blocks block the water outlet can be avoided.

Description

Water pan of refrigerator, air duct assembly of refrigerator and refrigerator

Technical Field

The invention relates to the technical field of refrigeration, in particular to a water pan of a refrigerator, an air duct assembly of the refrigerator and the refrigerator.

Background

At present, a water pan of most refrigerators is arranged under an evaporator, and defrosting water of the evaporator falls into the water pan after being melted and is collected through a water drainage groove at the bottom of the water pan until finally being discharged from a water drainage port of the water pan. Because the water pan is arranged under the evaporator, ice blocks sliding from the evaporator to the water pan are difficult to melt before being discharged into the water outlet in the defrosting process, and the water outlet is extremely easy to block, so that the water discharge is influenced.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a water pan of a refrigerator, which can reduce the possibility that the water pan blocks a water outlet.

The invention further provides an air duct assembly of the refrigerator.

The invention further provides the refrigerator.

According to a first aspect embodiment of the invention, the water pan of the refrigerator comprises:

a cover plate body adapted to form a top air duct above the cover plate body;

the water catch bowl, along the air current direction in top wind channel set up in the low reaches of apron main part, just the apron main part is connected the water catch bowl.

According to the water pan of the refrigerator, the water pan comprises the cover plate main body, and the top air channel is formed above the cover plate main body, so that defrosting water falling from the evaporator during defrosting drips above the cover plate main body and then flows into the water collecting tank under the condition that the evaporator is arranged in the top air channel. Furthermore, even if ice falls, the ice cannot directly enter the water collecting tank and can be at least partially melted by the airflow in the top air duct when the ice falls above the cover plate main body, so that the possibility that the ice blocks block the water outlet can be avoided.

According to one embodiment of the present invention, the cover main body is inclined downward along the air flow direction of the top duct.

According to one embodiment of the invention, the water collection sump comprises:

the first water guide plate is connected with the cover plate main body;

a second water guide plate positioned at one side of the first water guide plate,

the third water guide plate is positioned on the other side of the first water guide plate;

the first water guide plate, the second water guide plate and the third water guide plate are arranged in an enclosing mode to form a first water guide path.

According to an embodiment of the invention, the water collection sump further comprises:

the first enclosing plate is arranged on one side, away from the first water guide plate, of the second water guide plate, and the first water guide plate, the second water guide plate and the first enclosing plate are arranged in an enclosing mode to form a second water guide path;

the second enclosing plate is arranged on one side, away from the first water guide plate, of the third water guide plate, and the first water guide plate, the third water guide plate and the second enclosing plate are arranged in an enclosing mode to form a third water guide path;

the first water guide path, the second water guide path and the third water guide path are joined to form a drain outlet.

According to one embodiment of the invention, one end of the cover plate main body, which is far away from the water collecting tank, is bent upwards to form a return air baffle, and the return air baffle is provided with a first return air opening.

According to one embodiment of the present invention, the return air baffle extends obliquely upward.

According to one embodiment of the invention, the free end of the return air baffle forms a mounting strip.

According to one embodiment of the invention, the cover plate main body is bent upwards to form guard plates along two sides of the width direction of the top air duct, and the guard plates are provided with second air return openings.

According to the second aspect of the invention, the air duct assembly of the refrigerator comprises the water pan of the refrigerator, and further comprises:

a top air duct;

the evaporator is arranged above the cover plate main body and is positioned in the top air channel;

and the heater comprises a first heating part arranged between the bottom radiating surface of the evaporator and the cover plate main body.

According to the air duct assembly of the refrigerator provided by the embodiment of the invention, as the air duct assembly comprises the water pan of the refrigerator, the technical effect of the water pan of the refrigerator is achieved, and the details are not repeated.

According to an embodiment of the present invention, further comprising:

the downstream end part of the top air duct is communicated with the upstream end part of the back air duct, and a fan is arranged at the joint of the top air duct and the back air duct; the water collecting tank comprises a first water guide plate connected with the cover plate main body, and a second water guide plate and a third water guide plate which are positioned on two sides of the first water guide plate, wherein an air suction opening of the fan faces towards the first water guide plate, and a gap exists between the first water guide plate and the air suction opening.

According to one embodiment of the invention, the air duct assembly of the refrigerator comprises a front air duct cover plate and a rear air duct cover plate, the back air duct is formed between the front air duct cover plate and the rear air duct cover plate, the front air duct cover plate is provided with an opening, and the top air duct is communicated with the back air duct through the opening.

According to the embodiment of the third aspect of the invention, the refrigerator comprises the air duct assembly of the refrigerator and further comprises a refrigerating chamber, and the top air duct is arranged at the top of the refrigerating chamber.

According to the refrigerator provided by the embodiment of the invention, the refrigerator comprises the air duct assembly of the refrigerator, so that the technical effect of the air duct assembly of the refrigerator is achieved, and the details are not repeated.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

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 schematic perspective view of a water pan integrated with a water collection tank according to an embodiment of the present invention;

fig. 2 is a schematic side view of a water pan integrated with a water collecting tank according to an embodiment of the present invention;

fig. 3 is a partial structural schematic view of an air duct assembly of a refrigerator according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of an air duct assembly of a refrigerator according to an embodiment of the present invention;

fig. 5 is a schematic top view of an air duct assembly of a refrigerator according to an embodiment of the present invention;

FIG. 6 is a schematic view of a partial structure of an air duct assembly of a refrigerator having an air return duct according to an embodiment of the present invention;

FIG. 7 is a partial structural view of an air duct assembly of a refrigerator showing a flow direction of an air current according to an embodiment of the present invention; in fig. 7, the direction of the hollow arrow indicates the flow direction of the air flow.

Fig. 8 is a schematic structural view of a refrigerator according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view taken at A-A in FIG. 8;

reference numerals:

1. a top air duct; 2. an evaporator; 3. a first heat-conducting plate; 4. a heater; 401. a first heating section; 402. a second heating section; 5. a back air duct; 6. an upper air duct cover plate; 7. a water pan; 701. an air return baffle; 7011. a first air return opening; 702. a cover plate main body; 703. a water collection tank; 7031. a first water guide plate; 7032. a second water guide plate; 7033. a third water guide plate; 7034. a first enclosing plate; 7035. a second enclosing plate; 7036. a water outlet; 704. mounting a bar; 8. a fan; 9. a front air duct cover plate; 901. an opening part; 10. a rear air duct cover plate; 1011. a fixed seat; 11. a second heat-conducting plate; 12. a return air duct; 13. a second air return inlet; 14. buckling; 15. a refrigerated compartment; 16. a freezing compartment.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "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 in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Referring to fig. 1 to 7, a water tray of a refrigerator according to an embodiment of the first aspect of the present invention includes a cover plate main body 702 and a water collection tank 703. Above the cover plate body 702 is adapted to form a top air duct 1; the water collection tank 703 is disposed downstream of the cover main body 702 in the airflow direction of the top duct 1, and the cover main body 702 is connected to the water collection tank 703.

According to the water pan of the embodiment of the invention, since the water pan comprises the cover plate main body 702 and the top air duct 1 is formed above the cover plate main body 702, when the evaporator 2 is arranged in the top air duct 1, the defrosting water falling from the evaporator 2 during defrosting drops to the upper side of the cover plate main body 702 and then flows into the water collecting tank 703. Further, even if ice falls, the ice does not directly enter the water collection tub 703 and is at least partially melted by the airflow in the top air path 1 when the ice falls above the cover main body 702, so that the possibility of the ice blocking the water discharge port 7036 can be avoided.

In one embodiment, the cover plate main body 702 is inclined downward along the airflow direction of the top duct 1. This kind of apron main part 702 can play certain guide effect to the air current in defrosting water and the top wind channel 1, when guaranteeing the water collector drainage effect, guarantees the inside air current circulation of refrigerator. Of course, even if the cover plate main body 702 is horizontally disposed, it is also possible to sufficiently defrost and drain the defrost water as long as the bottom surface of the top air duct 1 is ensured to be obliquely disposed.

In one embodiment, referring to fig. 1 to 3, the water collection tank 703 includes a first water guide plate 7031, and a second water guide plate 7032 and a third water guide plate 7033 located at two sides of the first water guide plate 7031, and the first water guide plate 7031, the second water guide plate 7032 and the third water guide plate 7033 are enclosed to form a first water guide path. Most of the water dropping above the cover plate main body 702 during defrosting flows along the first water guide plate 7031; a small portion of the water flows along the second water guide plate 7032 and the third water guide plate 7033.

In fig. 1 to 3, the first water guide plate 7031, the second water guide plate 7032, and the third water guide plate 7033 are all angled to the vertical direction and the horizontal direction to meet the flow guiding requirement for the defrosting water, so that the defrosting water is collected to the position of the water outlet 7036 and finally discharged through the water outlet 7036.

In one embodiment, a first enclosing plate 7034 is disposed on a side of the second water guide plate 7032 away from the first water guide plate 7031, a second enclosing plate 7035 is disposed on a side of the third water guide plate 7033 away from the first water guide plate 7031, a second water guide plate 7032 and the first enclosing plate 7034 enclose a second water guide path, a third water guide path is enclosed by the first water guide plate 7031, the third water guide plate 7033 and the second enclosing plate 7035, and the first water guide path, the second water guide path and the third water guide path are merged to form a water outlet 7036. Under this condition, even if a great part of water flows along the second water guide plate 7032 and the third water guide plate 7033 during defrosting, due to the arrangement of the first enclosing plate 7034 and the second enclosing plate 7035, defrosting water can be prevented from flowing out of the water collecting tank 703, adverse effects on other parts are avoided, and normal operation of an air duct assembly of the refrigerator is ensured.

In one embodiment, one end of the cover plate main body 702 away from the water collecting tank 703 is bent upwards to form the return air baffle 701 of the top air duct 1, and the return air baffle 701 is provided with a first return air opening 7011 communicated with the top air duct 1.

The water pan is installed in the refrigerator, in the process of refrigerating of the refrigerator, airflow flows through the evaporator 2 in the top air duct 1 along the top air duct 1 and is finally introduced into the refrigerating chamber, and the airflow returns to the top air duct 1 from the first air return port 7011 after heat exchange in the refrigerating chamber so as to achieve circulation of the airflow. When the evaporator 2 is heated to defrost, the defrost water falls from the evaporator 2 to above the cover plate main body 702 and flows to the water collection tank 703 along the inclination of the cover plate main body 702. The arrangement of the return air baffle 701 can prevent sundries in the refrigerating room from entering the top air duct 1, and the blockage of the top air duct 1 is avoided.

In one embodiment, referring to fig. 6 and 7, the return air baffle 701 extends obliquely upward. Since the hot air flowing back from the refrigerating compartment flows from bottom to top, the return air baffle 701 is arranged obliquely, so that the return air effect of the first return air port 7011 can be effectively improved, and the air circulation efficiency is improved.

In one embodiment, the free end of the return air baffle 701 is bent to form a mounting bar 704, and an opening is formed in the mounting bar 704, so that the water pan can be fixed to the inside of the refrigerator through the mounting bar 704 and the opening.

Referring to fig. 6 and 7, the cover plate main body 702 is bent upward along two sides of the width direction of the top air duct 1 to form a guard plate, and the guard plate is formed with a second air return opening 13. Because the return air direction of the first return air port 7011 is different from the return air direction of the second return air port 13, the air flow can be ensured to flow to the evaporator 2 in the top air duct 1 from different directions, so that the evaporator 2 is ensured to fully cool the air flow, and a better refrigeration effect is realized. Referring to fig. 6, the width direction of the top duct 1 is perpendicular to the front-rear direction in fig. 6.

According to the embodiment of the present invention, referring to fig. 1 to 3, the water collecting channel 703 is integrally formed on the water receiving tray, so as to simplify the air duct assembly of the refrigerator, reduce the difficulty of assembly thereof and save the time of assembly thereof.

According to the embodiment of the second aspect of the invention, the air duct assembly of the refrigerator comprises the water pan, and further comprises a top air duct 1, an evaporator 2 and a heater 4. The evaporator 2 is arranged above the cover plate main body 702 and is positioned in the top air duct 1; the heater 4 includes a first heating portion 401 provided between the bottom heat radiation surface of the evaporator 2 and the cover main body 702.

According to the air duct assembly of the refrigerator provided by the embodiment of the invention, the first heating part 401 of the heater 4 is arranged between the bottom radiating surface of the evaporator 2 and the bottom surface of the top air duct 1, so that the heat flow at the bottom of the evaporator 2 is increased, and the defrosting time can be effectively reduced. Also, since the first heating part 401 is disposed below the evaporator 2 instead of being installed to the evaporator 2 by means of a slot, the heater 4 can be prevented from being damaged.

The evaporator 2 is arranged above the first heating part 401, and as the first heating part 401 defrosts the heat dissipation surface at the bottom of the evaporator 2, the hot air moves upwards, thereby defrosting the whole evaporator 2. Furthermore, as can be seen from fig. 4 and 5, the evaporator 2 is horizontally arranged (including the case where the evaporator 2 is arranged along the horizontal plane, and the case where the evaporator 2 and the horizontal plane form a certain inclination angle), so as to provide a guarantee for increasing the contact area between the evaporator 2 and the heater 4.

In one embodiment, the bottom surface of the top air duct 1 is inclined downward along the airflow direction in the top air duct 1, so that the defrosting water can be ensured to drop to the bottom surface of the top air duct 1 and then flow into the water collecting tank 703 along the bottom surface of the top air duct 1, and reliable guarantee is provided for discharging the defrosting water.

According to the embodiment of the present invention, referring to fig. 7, the "bottom surface of the top air duct 1 is disposed to be inclined downward along the direction of the air flow in the top air duct 1", which means that the bottom surface of the top air duct 1 is inclined downward from the front to the rear direction. In fig. 7, the "direction of air flow in the top duct" is also the direction from front to back.

According to the embodiment of the invention, the top air duct 1 is transversely arranged, and the air flow in the top air duct 1 flows from the front to the rear of the refrigerator. The condition can ensure that the airflow in the refrigerator fully flows, and a better refrigeration effect is achieved.

The air duct assembly of the refrigerator according to the embodiment of the invention comprises an upper air duct cover plate 6 and a water pan. Wherein, a top air duct 1 is formed between the upper air duct cover plate 6 and the water pan. It is of course worth mentioning that the upper duct cover 6 is not a necessary component. For example, inside a refrigerator, the top air duct 1 may be formed between the outer surface of the inner container of the refrigerator (the surface facing the refrigeration compartment is called the inner surface) and the water pan. That is, regardless of the configuration, the top duct 1 located above the refrigerating compartment may be formed.

When the air flow enters the top air duct 1 from the refrigeration compartment, the place where the air flow passes first can cause serious frosting problem due to the vapor carried by the air flow, and then the part of the upper stream of the evaporator 2 is frosted most seriously along the air flow direction of the top air duct 1. For this phenomenon, the heater 4 is designed, that is, along the airflow direction in the top air duct 1, so that the heating power of the upstream part of the first heating part 401 is higher than that of the downstream part of the first heating part 401, and further on the basis of ensuring the defrosting effect, the energy consumption is saved, and the temperature rise condition in the refrigerating room during defrosting time is weakened. For example, the heater 4 takes the form of a heating tube, and the heater 4 is designed in sections such that the distribution density of the heating tube section corresponding to the upstream position is greater than the distribution density of the heating tube section corresponding to the downstream position. For another example, the heater 4 is in the form of a heating resistor, and the resistance value of the heating resistor corresponding to the upstream position is larger than the resistance value of the heating resistor corresponding to the downstream position. In addition, it should be noted that "upstream" and "downstream" in the embodiments of the present invention refer to relative concepts.

In one embodiment, a first heat-conducting plate 3 is disposed within the top air duct 1. The first heat conducting plate 3 is located in the top air duct 1 and attached to the bottom surface of the heater 4. Most of the defrosting water drops to the first heat conducting plate 3 and moves along the first heat conducting plate 3 to finally enter the water collecting tank 703. The first heat-conducting plate 3 here acts both as a flow guide and as a heat-conducting plate. Wherein, the effect that first heat-conducting plate 3 acts as the guide plate is embodied: when the defrosting water flows to the first heat conduction plate 3 in the defrosting process, the first heat conduction plate 3 guides the defrosting water to the water collection tank 703. The role of the first heat-conductor plate 3 as a heat-conductor plate is embodied: the heat emitted by the heater 4 in the defrosting process is conducted to the surrounding air and the evaporator 2 through the first heat conduction plate 3. Of course, the first heat-conducting plate 3 is not necessarily attached to the bottom surface of the heater 4, and a certain gap may exist between the first heat-conducting plate 3 and the bottom surface of the heater 4.

In one embodiment, the first heat conducting plate 3 includes a water receiving portion located below the evaporator 2 and a water collecting portion located downstream of the water receiving portion and having a shape matching with the water collecting groove, so that in this case, the defrosting water flows into the water collecting portion along the water receiving portion of the first heat conducting plate 3, and the water collecting portion heats and melts the ice cubes therein by conducting heat, so as to prevent the ice cubes from blocking the water outlet 7036.

In one embodiment, the heater includes a second heating part 402 connected to both ends of the first heating part 401, the second heating part being provided to the water collecting part. Further, by providing the second heating unit 402, ice in the water collecting unit can be heated and melted more favorably.

In one embodiment, first heat-conducting plate 3 is attached between the top surface of cover plate body 702 of the drip tray and the bottom surface of heater 4 (in most cases, a foam layer, as will be described later, is also provided between first heat-conducting plate 3 and the drip tray), and the top surface of heater 4 is attached to the bottom heat-dissipating surface of evaporator 2. That is, first heat-conducting plate 3 respectively with water collector and heater 4 direct contact, heater 4 and evaporimeter 2 direct contact, and then can easy to assemble, guarantee heat conduction efficiency and save installation space.

In one embodiment, the first plate 3 is in the form of a thermally conductive side and thermally insulating side. That is, the side of the first heat-conducting plate 3 facing the heater 4 conducts heat, and the side of the first heat-conducting plate 3 facing the drip tray insulates heat. Furthermore, the first heat conduction plate 3 does not transfer heat to the refrigeration compartment through the water receiving disc while the heater 4 conducts heat, and the influence on the temperature in the refrigeration compartment is reduced. Of course, in the case that the first heat conduction plate 3 and the water pan are provided with foam layers, the first heat conduction plate 3 may also adopt a structural form of bilateral heat conduction.

In one embodiment, with reference to fig. 4 and 5, the first heating section 401 is a serpentine coil that is secured to the top surface of the first conductive plate 3. For example, the serpentine coil may be uniformly wound around the top surface of the first conductive plate 3, or may be non-uniformly wound around the top surface of the first conductive plate 3. Further, the first heating section 401 may employ an aluminum pipe. For example, in fig. 5, the first heating part 401 is fixed to the first heat conductive plate 3 by a clip 14. Of course, the first heating part 401 may be mounted on the first heat conducting plate 3 by other methods, for example, the first heating part 401 may be fixed by gluing or welding. The structure and material of the first heating portion 401 are not limited to those illustrated here, as long as the defrosting requirement of the evaporator 2 can be achieved.

In one embodiment, the air duct assembly of the refrigerator further includes a second heat-conducting plate 11, wherein the second heat-conducting plate 11 is located in the top air duct 1 and disposed above the evaporator 2, and the evaporator 2 is fixed between the heater 4 and the second heat-conducting plate 11. Under this condition, be equivalent to in the top wind channel 1 from last to having set gradually second heat-conducting plate 11, evaporimeter 2, heater 4 and first heat-conducting plate 3 down, also be that evaporimeter 2 and heater 4 are set up between second heat-conducting plate 11 and first heat-conducting plate 3 to make the air that obtains through the heating up of heater 4 flow between second heat-conducting plate 11 and first heat-conducting plate 3 and fully heat the defrosting evaporator 2.

In one embodiment, foam layers are disposed between the first heat-conducting plate 3 and the drip tray and between the second heat-conducting plate 11 and the upper airway cover 6. Wherein, the foam layer between first heat-conducting plate 3 and the water collector can prevent to produce the influence to the indoor temperature of refrigeration when heater 4 heats. The foam layer between the second heat conducting plate 11 and the upper air duct cover plate 6 can play a role in heat insulation and can also adapt to the trend of the top air duct 1, for example, when the top air duct 1 inclines, the structure of the foam layer between the second heat conducting plate 11 and the upper air duct cover plate 6 can be designed, so that the second heat conducting plate 11 is attached to the upper air duct cover plate 6 through the foam layer.

In one embodiment, the first conductive plate 3 and the second conductive plate 11 are both aluminum plates. In addition, in order to avoid the influence on other parts of the refrigerator, the first heat conduction plate 3 and the second heat conduction plate 11 can adopt a structure of heat insulation on one side and heat conduction on the other side. That is, the first heat-conducting plate 3 is towards one side of the evaporator 2 and the second heat-conducting plate 11 is towards one side of the evaporator 2 for heat conduction, and the first heat-conducting plate 3 is away from one side of the evaporator 2 and the second heat-conducting plate 11 is away from one side of the evaporator 2 for heat insulation, so that the second heat-conducting plate 11 and the first heat-conducting plate 3 can also block the influence of the heater 4 on other components while improving the defrosting efficiency. Wherein the first heat-conducting plate 3 and the second heat-conducting plate 11 can adopt the same structural form.

In one embodiment, the air duct assembly of the refrigerator further includes a back air duct 5, a downstream end of the top air duct 1 is communicated with an upstream end of the back air duct 5, a fan 8 is disposed at a joint of the top air duct 1 and the back air duct 5, an air suction opening of the fan 8 is disposed toward the first water guide plate 7031 of the top air duct 1 and the water collection tank 703, and a gap is formed between the first water guide plate 7031 and the air suction opening. Under this kind of circumstances, the setting of water catch bowl 703 just in time can reserve the space of dodging that corresponds for fan 8. For example, in one embodiment, the distance between the first water guide plate 7031 and the air suction opening is greater than the minimum distance required by the specification of the fan 8, in which case the air suction resistance of the fan 8 can be reduced, the duct noise can be reduced, the air circulation efficiency can be improved, and the air volume can be satisfied.

In one embodiment, the cover plate main body 702 and the first water guide plate 7031 are in arc transition connection, so that not only is the water after defrosting discharged, but also wind enters the back air duct 5, and the wind circulation efficiency is improved.

In one embodiment, to utilize the defrost water, the defrost water is directed into the compressor compartment of the refrigerator through the drain port 7036, and the defrost water is utilized to cool the equipment within the compressor compartment. For example, a drain pipe may be embedded in the refrigerator, and one end of the drain pipe is communicated with the drain port 7036 of the water collecting tank 703, and the other end is communicated with the compressor bin.

In one embodiment, the air duct assembly of the refrigerator includes a front air duct cover plate 9 and a rear air duct cover plate 10, a back air duct 5 is formed between the front air duct cover plate 9 and the rear air duct cover plate 10, the front air duct cover plate 9 is provided with an opening 901, and the top air duct 1 is communicated with the back air duct 5 through the opening 901. Further, the air flow in the top air duct 1 flows into the back air duct 5, and enters the refrigerating compartment through the back air duct 5. And because the fan 8 is arranged between the top air duct 1 and the back air duct 5, the smoothness of the air flow can be further ensured. Among the front air duct cover plate 9 and the rear air duct cover plate 10, the front air duct cover plate 9 is arranged close to the refrigerating compartment, and the rear air duct cover plate 10 is arranged on one side of the front air duct cover plate 9, which is back to the refrigerating compartment.

In one embodiment, the rear duct cover 10 is provided with a mounting 1011 for the fan 8. Install fan 8 in fixing base 1011, fan 8 corresponds with opening 901 this moment, guarantees that fan 8 during operation circulation gets into back wind channel 5 through opening 901.

Of course, the back air duct 5 may be formed between the inner container and the back plate of the drawer, or may be formed between the front air duct cover 9 and the inner container, besides being formed between the front air duct cover 9 and the back air duct cover 10. Wherein, when back wind channel 5 formed between inner bag and drawer, cancelled preceding wind channel apron 9 and back wind channel apron 10 in other words, and then can reduce the required additional space that occupies of back wind channel 5, increase the storage depth of refrigeration room, do benefit to the storage of more articles. When the back air duct 5 is formed between the inner container and the front air duct cover plate 9, the back air duct cover plate 10 is equivalently cancelled, so that the additionally occupied space of the back air duct 5 can be reduced, the storage depth of the refrigerating chamber is increased, and the storage of more articles is facilitated.

According to an embodiment of the present invention, the back air duct 5 is arranged longitudinally so that the air flow in the back air duct 5 flows from top to bottom. The term "longitudinal" as used herein includes vertical and also includes directions that are at an angle to the vertical. That is, when the back air duct 5 is formed between the front air duct cover plate 9 and the back air duct cover plate 10, the front air duct cover plate 9 and the back air duct cover plate 10 may be vertically disposed, and may also be at a certain angle with the vertical direction, as long as the air flow in the top air duct 1 can be guided into the refrigerating compartment through the back air duct 5.

In one embodiment, an air outlet is formed in the back plate of the drawer, and the air outlet is matched with the liner to realize the guiding and flowing of the air flow, so that the air flows out of the top air duct 1 and then enters the refrigeration compartment through the air outlet of the back plate.

According to an embodiment of the present invention, referring to fig. 1 to 5, the heater 4 includes a second heating part 402 connected to both ends of the first heating part 401, and the second heating part 402 is disposed on the second water guide plate 7032 and the third water guide plate 7033 and extends to the water discharge port 7036. By arranging the second heating part 402 on the second water guide plate 7032 and the third water guide plate 7033, even if ice cubes enter the water collection tank 703 through the first heat conduction plate 3 in the defrosting process, the ice cubes can be heated by the second heating part 402 to be melted, so that the water outlet 7036 of the water collection tank 703 is prevented from being blocked. Of course, the second heating part 402 may be disposed at a transition position between the first water guide plate 7031 and the second water guide plate 7032 and a transition position between the first water guide plate 7031 and the third water guide plate 7033.

When the air duct assembly of the refrigerator is provided with the first heat conduction plate 3 and the first heat conduction plate 3 includes the water collecting part, the second heating part 402 is disposed at a position where the water collecting part corresponds to the second water guide plate 7032 and the third water guide plate 7033. Accordingly, when ice cubes enter the water collecting portion through the first heat transfer plate 3, the ice cubes in the water collecting portion can be heated by the second heating portion 402 to be melted.

In one embodiment, the evaporator 2 is disposed to be inclined downward along the direction of air flow in the top wind tunnel 1. The sinking of the cold air can be facilitated under the condition; and because the direction that the hot-air after rising the temperature moves upwards is certain angle with the evaporimeter surface, and then can also do benefit to by the hot-air rising in-process that heater 4 heaied and obtained and fully contact with evaporimeter 2, do benefit to and improve the defrosting effect.

According to the embodiment of the present invention, please refer to fig. 6 and 7, the air duct assembly of the refrigerator further includes air return ducts 12, and the air return ducts 12 are disposed at two sides of the top air duct 1 in the width direction; one end of the return air pipe 12 is used for being communicated with the refrigerating chamber, and the other end is communicated with the second return air inlet 13. Furthermore, in addition to the refrigeration compartment disposed below the top air duct 1, air can be returned through the first air return port 7011, and air can be returned through the air return pipe 12 and the second air return port 13 in other compartments. Referring to fig. 6, the width direction of the top duct 1 is perpendicular to the front-rear direction in fig. 6. Referring to fig. 6, the width direction of the top duct 1 is perpendicular to the front-rear direction in fig. 6.

According to the embodiment of the third aspect of the invention, a refrigerator is provided, and with reference to fig. 8 and 9, the refrigerator comprises a refrigerating compartment and the air duct assembly of the refrigerator, and the top air duct 1 is arranged at the top of the refrigerating compartment.

The refrigerator provided with the air duct assembly can improve defrosting efficiency. When the water collecting groove 703 is integrally formed on the water receiving tray 7, the number of the components of the air duct assembly can be reduced, the structure of the air duct assembly is simplified, and the manufacturing cost of the air duct assembly is reduced.

According to the embodiment of the invention, the refrigeration compartment comprises a refrigeration compartment 15 and a freezing compartment 16, and the top air duct 1 is arranged at the top of the freezing compartment 16. In this case, the freezing compartment 16 returns air through the first return air port 7011. Of course, the refrigerating compartment may also include a temperature-changing compartment, or the refrigerating compartment may include only one of the freezing compartment 16, the refrigerating compartment 15, and the temperature-changing compartment.

When the air duct assembly of the refrigerator further comprises the air return duct 12, one end of the air return duct 12 is used for being communicated with other refrigerating chambers except the freezing chamber 16, and the other end of the air return duct 12 is communicated with the second air return opening 13. And the other refrigerating compartments except the freezing compartment 16 return air through the return air duct 12 and the second return air inlet 13.

In one embodiment, the back air duct 5 includes a first back air duct 5 corresponding to the refrigerating compartment 15 and a second back air duct 5 corresponding to the freezing compartment 16. The top duct 1 communicates the first and second back ducts 5 and 5 to supply air to the refrigerating compartment 15 and the freezing compartment 16.

In one embodiment, the cold storage compartment 15 is disposed above the freezer compartment 16, with the top duct 1 disposed in correspondence with the center sill between the cold storage compartment 15 and the freezer compartment 16. The freezing compartment 16 returns through the first return air port 7011 of the return air baffle 701, and the refrigerating compartment 15 returns through the return air duct 12.

The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. A water pan of a refrigerator, comprising:

a cover plate body adapted to form a top air duct above the cover plate body;

2. The drip tray of a refrigerator according to claim 1, wherein the cover main body is inclined downward in an air flow direction of the top duct.

3. The water tray of a refrigerator according to claim 1, wherein the water collection gutter comprises:

the first water guide plate is connected with the cover plate main body;

4. The drip tray of a refrigerator according to claim 3, wherein the drip tank further comprises:

5. The water pan of a refrigerator as claimed in any one of claims 1 to 4, wherein an end of the cover plate main body remote from the water collecting groove is bent upward to form a return air baffle, and the return air baffle is formed with a first return air opening.

6. The drip tray of a refrigerator as claimed in claim 5, wherein said return air baffle extends obliquely upward.

7. The water pan of a refrigerator as claimed in claim 5, wherein the free end of the return air baffle forms a mounting strip.

8. The defrosting pan of a refrigerator according to any one of claims 1 to 4, wherein the cover plate main body is bent upwards to form guard plates along both sides of the width direction of the top air duct, and the guard plates are provided with second air return openings.

9. An air duct assembly of a refrigerator, comprising the water tray of the refrigerator of any one of claims 1 to 8, further comprising:

a top air duct;

10. The air duct assembly of a refrigerator according to claim 9, further comprising:

11. The air duct assembly of the refrigerator according to claim 10, wherein the air duct assembly of the refrigerator includes a front air duct cover plate and a rear air duct cover plate, the front air duct cover plate and the rear air duct cover plate form the back air duct therebetween, the front air duct cover plate is provided with an opening portion, and the top air duct communicates with the back air duct through the opening portion.

12. A refrigerator comprising the air duct assembly of claim 10 or 11, and further comprising a refrigerating compartment, wherein the top air duct is disposed at the top of the refrigerating compartment.