CN211823343U

CN211823343U - Air-cooled refrigerator

Info

Publication number: CN211823343U
Application number: CN202020047620.1U
Authority: CN
Inventors: 杨寒星; 田振华; 李天平
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-10-30
Anticipated expiration: 2030-01-09

Abstract

The utility model discloses an air-cooled refrigerator. The refrigerator comprises a refrigerator body, an air duct component, a fan, a refrigerating system and a defrosting heater, wherein the refrigerator body defines a refrigerating chamber, and the refrigerating chamber contains an evaporator of the refrigerating system; the air channel component is provided with an airflow driving part positioned at the outlet of the refrigerating chamber, a defrosting air channel for communicating the airflow driving part with the refrigerating chamber and a defrosting air door for switching on or off the defrosting air channel; the fan is arranged at the airflow driving part, and when the defrosting air door is communicated with the defrosting air channel, the fan drives airflow to sequentially pass through the airflow driving part and the defrosting air channel from the refrigerating chamber and then return to the refrigerating chamber, and the airflow passes through the defrosting heater; the defrosting air channel comprises a first air outlet and a second air outlet which are separately arranged on two opposite sides of the evaporator, and the air outlet direction of the first air outlet and the air outlet direction of the second air outlet have a non-zero included angle or the first air outlet and the second air outlet incline in the same direction relative to the evaporator, so that rotational flow is formed to improve defrosting efficiency and uniformity.

Description

Air-cooled refrigerator

Technical Field

The utility model relates to an air-cooled refrigerator belongs to domestic appliance technical field.

Background

Among the prior art, the refrigerator is all taken away the heat in with the refrigerator through the refrigerant in the evaporimeter, and then provides the lower air conditioning of temperature, because contain a large amount of steam in the gas in the refrigerator, at the gaseous in-process that is refrigerated, these steam can be with the surface of the form accumulation in the evaporimeter of frost congealing, and then influence the work efficiency of evaporimeter.

In most frost-free air-cooled refrigerators in the market, a defrosting heater is arranged in a refrigerating chamber for accommodating an evaporator, and the evaporator is heated by the defrosting heater so as to achieve the aim of defrosting. However, the defrosting heater directly heats frost formed on the evaporator, which causes uneven defrosting of the surface of the evaporator and slow defrosting rate, and further requires the defrosting heater to heat for a long time, thereby increasing energy consumption of the refrigerator.

Disclosure of Invention

At least one of the technical problems of uneven defrosting on the surface of the evaporator, low defrosting speed, high energy consumption and the like in the prior art is solved, and the aim of the utility model is to provide an air-cooled refrigerator.

In order to achieve the above object of the present invention, an embodiment of the present invention provides an air-cooled refrigerator, including a box body, an air duct member, a fan, a refrigeration system, and a defrosting heater, wherein the box body defines a refrigeration chamber, and the refrigeration chamber accommodates an evaporator of the refrigeration system;

the air duct component is provided with an airflow driving part positioned at the outlet of the refrigerating chamber, a defrosting air duct for communicating the airflow driving part with the refrigerating chamber and a defrosting air door for switching on or off the defrosting air duct;

the fan is arranged at the airflow driving part, and when the defrosting air door is communicated with the defrosting air channel, the fan drives airflow to sequentially pass through the airflow driving part and the defrosting air channel from the refrigerating chamber and then return to the refrigerating chamber, and the airflow flows through the defrosting heater;

the defrosting air channel comprises a first air outlet and a second air outlet, the first air outlet and the second air outlet are separately arranged on two opposite sides of the evaporator, and the air outlet direction of the first air outlet and the air outlet direction of the second air outlet have a non-zero included angle or the first air outlet and the second air outlet are opposite to the same-direction inclined air outlet of the evaporator.

As a further improvement of an embodiment of the present invention, the air duct member is disposed at a front side of the refrigerating chamber;

in the left-right direction, the evaporator is positioned between the first air outlet and the second air outlet;

one of the first air outlet and the second air outlet blows air from front to back, and the other air outlet slants to the back and inwards blows air towards the evaporator; or one of the first air outlet and the second air outlet is obliquely arranged at the rear outer side and is far away from the evaporator for air outlet, and the other oblique rear inner side is towards the evaporator for air outlet.

As a further improvement of an embodiment of the present invention, the airflow driving part has a first outlet and a second outlet;

the defrosting air channel comprises a first sub air channel and a second sub air channel, the first sub air channel is used for communicating the first outlet with the first air outlet, the second sub air channel is used for communicating the second outlet with the second air outlet, and the first sub air channel and the second sub air channel are independent relatively.

As a further improvement of an embodiment of the present invention, the air duct member includes a heat insulating layer and a rear cover plate attached to a rear wall surface of the heat insulating layer;

the outlet of the refrigeration chamber is provided with a through hole which penetrates through the rear cover plate from front to back;

the air flow driving part is a cavity which is concavely arranged on the rear wall surface of the heat insulation layer, and the fan is accommodated in the cavity and corresponds to the front and the rear of the through hole;

the first sub-air duct and the second sub-air duct are disposed on the left and right sides of the airflow driving portion.

As a further improvement of an embodiment of the present invention, the first sub-duct is configured as a first groove disposed on a rear wall surface of the heat insulation layer, the first air outlet is configured as a hollow straight tube which penetrates the rear cover plate from front to back and extends vertically backward, and the straight tube corresponds to a front-back position of the first groove;

the second sub-air duct is a second groove formed in the rear wall surface of the heat insulation layer, the second air outlet is a hollow inclined tube which penetrates through the rear cover plate from front to back and extends towards the rear inner side, and the inclined tube corresponds to the second groove in front and back positions.

As a further improvement of an embodiment of the present invention, at least a portion of the first grooves extends vertically and lengthwise, and the number of the straight tubes is a plurality of straight tubes vertically arranged along the first grooves at intervals;

at least part of the second grooves vertically and lengthily extend, and the number of the inclined cylinders is a plurality of the inclined cylinders which are in one-to-one correspondence with the straight cylinders;

each straight cylinder and the inclined cylinder corresponding to the straight cylinder are arranged to be horizontally coplanar.

As a further improvement of an embodiment of the present invention, the defrosting heater is disposed in the defrosting air duct.

As a further improvement of an embodiment of the present invention, the defrosting air duct includes a first sub air duct and a second sub air duct, the first sub air duct and the second sub air duct are independent from each other, and the first sub air duct and the second sub air duct are provided with the defrosting heater.

As a further improvement of an embodiment of the present invention, the box body further defines a storage compartment;

the air duct component is provided with a cold air supply duct for communicating the airflow driving part with the storage chamber, an air supply air door for communicating or disconnecting the cold air supply duct, a return air duct for communicating the storage chamber with the inlet of the refrigeration chamber and a return air door for communicating or disconnecting the return air duct;

when the air supply air door switches on the air supply air duct and the air return air door switches on during the air return duct, fan drive air current follows the refrigeration room passes through in proper order the air current drive division send the cold air duct the room between the storing room return behind the air return duct the refrigeration room.

As a further improvement of an embodiment of the present invention, the air duct member includes a heat insulating layer, a rear cover plate attached to a rear wall surface of the heat insulating layer, and a front cover plate located at a front side of the heat insulating layer;

the air cooling duct and the defrosting duct are separated from the front side and the rear side of the heat-insulating layer;

the air flow driving part is provided with a third outlet, the air supply cooling duct is connected to the third outlet, and the air supply air door is arranged at the third outlet;

the air return duct is formed below the air duct component;

the return air door is arranged to be rotatably connected with a baffle plate at the rear edge of the lower end of the air duct component.

As a further improvement of an embodiment of the present invention, the air-cooled refrigerator further includes a controller, the controller is configured as:

controlling a compressor of the refrigeration system to start, the return air door to conduct the return air channel, the cold air supply door to conduct the cold air supply channel, the defrosting air door to close the defrosting air channel, the fan to be started and the defrosting heater to be closed so as to enable the refrigerator to execute a refrigeration mode;

controlling a compressor of the refrigerating system to be closed, the return air door to be closed, the return air duct to be closed, the air supply air door to be closed, the air supply air duct to be closed, the defrosting air door to be communicated with the defrosting air duct, the fan to be opened and the defrosting heater to be opened so that the refrigerator executes a defrosting mode.

Compared with the prior art, the utility model discloses following beneficial effect has: by arranging the defrosting air channel, when the defrosting heater heats and defrosts, the circulating air flow between the refrigerating chamber and the defrosting air channel can be realized, and the air-heat defrosting of the evaporator is realized by the circulating air flow, so that the uniform and rapid defrosting of the surface of the evaporator is facilitated; and moreover, the first air outlet and the second air outlet of the defrosting air channel are respectively arranged on two opposite sides of the evaporator, and the air outlet directions are different, so that a rotational flow can be formed around the evaporator in the refrigerating chamber, the uniform and rapid defrosting of the surface of the evaporator is further promoted, the heating duration of the defrosting heater is further shortened, and the energy conservation and consumption reduction are realized.

Drawings

Fig. 1 is a partial longitudinal sectional view of a refrigerator according to an embodiment of the present invention;

fig. 2 is a perspective view of a portion of an air duct member according to an embodiment of the present invention;

fig. 3 is a perspective view of the insulating layer of the air duct member according to an embodiment of the present invention;

fig. 4 is a perspective view of a rear cover plate of an air duct member according to an embodiment of the present invention;

fig. 5 is a rear view of a rear cover plate of an air duct member according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5, with the evaporator shown in phantom;

FIG. 7 is a rear elevational view of a rear cover plate of an air duct member according to another embodiment of the present invention;

fig. 8 is a sectional view taken along line a '-a' in fig. 7, in which the evaporator is illustrated by a broken line.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. However, these examples are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these examples are intended to be within the scope of the present invention.

Referring to fig. 1 to 6, an embodiment of the present invention provides an air-cooled refrigerator 100, where the refrigerator 100 includes a box body 1, an air duct member, a fan 6, a refrigeration system, and a defrosting heater 9.

With particular reference to fig. 1, the cabinet 1 defines a storage compartment 11 and a refrigeration compartment 12. The storage compartment 11 may be specifically configured as any one or any combination of a refrigerating compartment, a freezing compartment, a temperature changing compartment, and the like, and in this embodiment, the storage compartment 11 is a freezing compartment. The refrigerating chamber 12 contains the evaporator 12 of the refrigerating system, and when the air-cooled refrigerator 100 performs a refrigerating mode, the compressor 21 of the refrigerating system is started, the evaporator 12 can convert the air in the refrigerating chamber 12 into cold air, and the cold air can flow into the storage compartment 11 to cool the storage compartment 11.

The air duct member is provided at a side of the refrigerating compartment 12. In this embodiment in particular, the refrigeration compartment 12 is located behind the storage compartment 11, and the air duct member is located at the front side of the refrigeration compartment 12 and substantially separates the storage compartment 11 from the refrigeration compartment 12. Of course, the air duct member is not limited to be provided on the front side of the cooling compartment 12, and may be implemented in other orientation relation with the cooling compartment 12.

Referring specifically to fig. 1 to 3, the air duct member has an air flow driving portion 84, a defrosting air duct, and a defrosting damper 73.

The airflow driving part 84 is positioned at the outlet 121 above the refrigerating chamber 12, and the fan 6 is arranged at the airflow driving part 84; the defrosting air duct connects the airflow driving part 84 and the refrigerating chamber 12, and the defrosting air door 73 connects or disconnects the defrosting air duct.

When the defrosting air duct is closed by the defrosting air door 73, the air in the air flow driving part 84 cannot flow into the refrigerating chamber 12 through the defrosting air duct.

When the defrosting air door 73 is communicated with the defrosting air channel, the refrigerating chamber 12, the air flow driving part 84 and the defrosting air channel form a loop communicated with fluid, at the moment, if the fan 6 is opened, the fan 6 can drive air flow to sequentially pass through the air flow driving part 84 and the defrosting air channel from the refrigerating chamber 12 and then return to the refrigerating chamber 12, and the circulating air flow passes through the defrosting heater 9.

Therefore, when the refrigerator 100 executes the defrosting mode, the defrosting heater 9 heats and defrosts, and simultaneously, the circulating air flow between the refrigerating chamber 12 and the defrosting air channel can be realized, the air-heat defrosting of the evaporator 22 is realized by the circulating air flow, and the uniform and rapid defrosting of the surface of the evaporator 22 is facilitated.

In the present application, referring to fig. 2 and fig. 4 to 6, the defrosting air duct includes a first air outlet 831 and a second air outlet 832, the first air outlet 831 and the second air outlet 832 are separately disposed at two opposite sides of the evaporator 22, and air outlet directions of the first air outlet 831 and the second air outlet 832 have a non-zero included angle, that is, air outlet directions of the first air outlet 831 and the second air outlet 832 are different. Therefore, when the refrigerator 100 executes the defrosting mode, referring to fig. 5, the airflow V1 flowing into the cooling compartment 12 through the first air outlet 831 and the airflow V2 flowing into the cooling compartment 12 through the second air outlet 832 can form a rotational flow around the evaporator 22 in the cooling compartment 12, thereby ensuring uniform and rapid defrosting of the surface of the evaporator 22, shortening the heating time of the defrosting heater 9, saving energy, and reducing consumption.

Further, the evaporator 22 is located between the first outlet 831 and the second outlet 832 in the left-right direction, that is, the first outlet 831 and the second outlet 832 are separated from left and right opposite sides of the evaporator 22. In this embodiment, the first air outlet 831 is located on the right side of the evaporator 22, and is disposed closer to the right than the right edge of the evaporator 22; the second vent 832 is located at the left side of the evaporator 22, which is located further to the left than the left edge of the evaporator 22.

The first air outlet 831 blows air from front to back toward the right space of the evaporator 22, that is, the air outlet direction is from front to back, and the air outlet does not directly face the surface of the evaporator 22; the second outlet 832 is inclined to the rear and inside and discharges air toward the evaporator 22, that is, the direction of the discharged air is inclined from the front left to the rear right, and the discharged air is directed toward the surface of the evaporator 22. Thus, the air outlet directions of the first air outlet 831 and the second air outlet 832 form an acute included angle, and the air outlet direction of the first air outlet 831 is inclined inwards, so that a circulating current around the evaporator 22 is formed, the surface defrosting uniformity of the evaporator 22 is improved, and the defrosting speed is improved. Of course, the air outlet directions of the first outlet 831 and the second outlet 832 are not limited to this, and the positions may be changed or other changes may be implemented.

Further, the airflow drive portion 84 has a first outlet and a second outlet; the defrosting air duct includes a first sub-air duct 821 and a second sub-air duct 822, the first sub-air duct 821 communicates the first outlet with the first air outlet 831, the second sub-air duct 822 communicates the second outlet with the second air outlet 832, and the first sub-air duct 821 and the second sub-air duct 822 are independent of each other. In this way, when the refrigerator 100 performs the defrosting mode, the first sub-air duct 821 and the second sub-air duct 822 can synchronously receive the air flow from the air flow driving part 84 and guide the air flow into the cooling chamber 12, so as to facilitate the distribution of the air flow and further promote the defrosting uniformity and speed.

Preferably, the first sub-duct 821 and the second sub-duct 822 are separated from the left and right sides of the airflow driving part 84.

Specifically, the air duct member includes an insulating layer 5 and a rear cover plate 3. The laminating of back shroud 3 sets up on heat preservation 5 back wall surface 502, and the circular through-hole that link up back shroud 3 around the export 121 of aforementioned refrigeration room 12 specifically sets up in this embodiment, and when fan 6 opened, the air in the refrigeration room 12 can just can only flow out refrigeration room 12 through this through-hole. The airflow driving part 84 is provided as a cavity recessed in the rear wall surface 502 of the heat insulating layer 5, the fan 6 is accommodated in the cavity, and a lower circular area of the cavity corresponds to the through hole of the rear cover plate 3 in the front-rear direction. The first outlet is arranged on the right side of the upper rectangular area of the cavity, the upper end horizontal section of the first sub-air duct 821 is connected to the first outlet, and the first sub-air duct 821 is positioned on the right side of the cavity; the second outlet is provided at the left side of the upper rectangular region of the cavity, the upper horizontal section of the second sub duct 822 is connected to the second outlet, and the second sub duct 822 is located at the left side of the cavity. Therefore, the first sub air duct 821 and the second sub air duct 822 are separated from the left side and the right side of the airflow driving portion 84, so that air can be exhausted from the left side and the right side of the evaporator 22, extra space occupied by the arrangement of the first sub air duct 821 and the second sub air duct 822 can be reduced, the thickness of the air duct component in the front-back direction is ensured, and the volume of the storage compartment 11 is increased.

Further, the first sub-duct 821 is provided as a first recess provided in the rear wall surface 502 of the heat insulating layer 5, and the first outlet 831 is provided as a rectangular hollow straight tube which penetrates the rear cover 3 in the front-rear direction and extends vertically in the rear direction, and the straight tube corresponds to the front-rear position of the first recess. Therefore, when the rear cover plate 3 is attached to the rear wall surface 502 of the insulating layer 5, the airflow entering the first sub-air duct 821 from the airflow driving portion 84 can only enter the cooling chamber 12 through the first air outlet 831.

Similarly, the second sub-duct 822 is a second groove formed in the rear wall surface 502 of the heat insulation layer 5, and the second outlet 832 is a rectangular hollow inclined tube extending from the front to the rear through the rear cover plate 3 and obliquely from the rear to the inside, the inclined tube corresponding to the front to the rear of the second groove. Therefore, when the rear cover plate 3 is attached to the rear wall surface 502 of the insulating layer 5, the airflow entering the second sub-air duct 822 from the airflow driving portion 84 can only enter the cooling chamber 12 through the second air outlet 832.

The main body part of the defrosting air channel is constructed by the groove form (namely, the first groove and the second groove) on the rear wall surface 502 of the heat insulation layer 5, and the air outlet of the defrosting air channel is constructed by the hollow cylinder form (namely, the straight cylinder and the inclined cylinder) on the rear back plate 3, so that the air guide can be realized by the hollow cylinder form on one hand, and the structure processing is simple and the assembly is convenient on the other hand.

Wherein, on the heat preservation layer 5, the first groove and the second groove are arranged in bilateral symmetry.

Further, an upper horizontal segment of the first sub-duct 821 extends horizontally rightward from the first outlet; the first sub-duct 821 (i.e., the first groove) also has a vertical section extending vertically and long, and an upper end of the vertical section is connected to the horizontal section of the first sub-duct 821. The number of the straight cylinders is plural, and the plural straight cylinders are vertically arranged along the vertical section of the first sub-duct 821 (i.e., the first groove) at intervals. Therefore, the first sub-duct 821 can realize the outlet air at different heights through a plurality of straight cylinders.

Similarly, the upper horizontal segment of the second sub-air channel 822 extends horizontally to the left from the second outlet; the second sub air passage 822 (i.e., the second groove) also has a vertical section extending vertically and long, and an upper end of the vertical section is connected to the horizontal section of the second sub air passage 822. The number of the inclined cylinders is plural, and the plurality of the inclined cylinders are vertically arranged along the vertical section of the second sub-air passage 822 (i.e., the second groove) at intervals. Therefore, the second sub-air duct 822 can realize air outlet at different heights through a plurality of inclined cylinders.

Preferably, the number of the inclined cylinders is the same as that of the straight cylinders, and the inclined cylinders and the straight cylinders are in one-to-one correspondence; in the present embodiment, the number is three; each straight cylinder and the inclined cylinder corresponding to the straight cylinder are arranged to be horizontally coplanar, namely, approximately positioned at the same vertical height. Thus, circulation flows at different heights can be formed in the cooling compartment 12, and defrosting uniformity and efficiency of the evaporator 22 can be improved.

In addition, the number of the defrosting dampers 73 is set to two, one of which is disposed in the horizontal section of the first sub-air duct 821 (i.e., the first groove) to turn on or off the first sub-air duct 821, and the other of which is disposed in the horizontal section of the second sub-air duct 822 (i.e., the second groove) to turn on or off the second sub-air duct 822.

Further, the defrosting heater 9 is disposed in the defrosting air duct, so that when the refrigerator 100 performs a defrosting mode, the air flow entering the defrosting air duct is concentrated and quickly takes away heat of the defrosting heater 9 under the driving of the fan 6, and the defrosting speed is increased.

Preferably, the number of the defrosting heaters 9 is two, each defrosting heater 9 comprises a plurality of electric heating wires arranged in a matrix, and each electric heating wire is arranged in the defrosting air duct transversely to allow the air flow to pass through the plurality of electric heating wires.

One of the two defrosting heaters 9 is disposed in the horizontal section of the first sub-air duct 821 (i.e., the first groove) between the first opening and the defrosting damper 73 in the first sub-air duct 821; the other one of the air ducts is disposed in the horizontal section of the second sub-air duct 822 (i.e., the second groove) between the second opening and the defrosting damper 73 in the second sub-air duct 822.

Further, as mentioned above, when the air-cooled refrigerator 100 performs the cooling mode, the cool air in the cooling compartment 12 may be used to cool the storage compartment 11. Specifically, referring to fig. 1 to 3, the duct member further has a cooling air duct 81, an air supply damper 71, a return air duct 84, and a return air damper 72.

The air flow driving part 84 is communicated with the storage compartment 11 through the air supply cooling duct 81, and the air supply air door 71 is used for switching on or off the air supply cooling duct 81. Thus, when air supply damper 71 closes air supply duct 81, air in air flow driving portion 84 cannot flow into storage compartment 11 through air supply duct 81; when air supply damper 71 opens air supply duct 81, air in air flow driving portion 84 can flow into storage compartment 11 through air supply duct 81.

The air return duct 84 connects the storage compartment 11 to the lower front inlet 122 of the refrigeration compartment 12, and the air return duct 84 is connected or disconnected by the air return damper 72. Thus, when the return air damper 72 closes the return air duct 84, the air in the storage compartment 11 cannot flow into the refrigerating compartment 12 through the return air duct 84; when the return air damper 72 opens the cool air duct 81, the air in the storage compartment 11 can flow into the cooling compartment 12 through the return air duct 84.

Further, when the air supply damper 71 is connected to the air supply duct 81 and the air return damper 72 is connected to the air supply duct 81, if the fan 6 is turned on, the fan 6 can drive the airflow to sequentially pass through the airflow driving part 84, the air supply duct 81, the storage compartment 11 and the air return duct 84 from the refrigerating compartment 12 and then return to the refrigerating compartment 12. Therefore, by arranging the air supply air door 71 and the air return air door 72, the loop between the storage compartment 11 and the refrigerating compartment 12 can be closed in the defrosting mode of the refrigerator 100, so that the temperature fluctuation of the storage compartment 11 caused by the overflow of hot air into the storage compartment 11 is avoided.

Specifically, the refrigerator 100 further includes a controller that is connected to and controls the refrigeration system, the return air damper 72, the cool air supply damper 71, the defrosting damper 73, the fan 6, and the defrosting heater 9, so that the refrigerator 100 performs a defrosting mode or a cooling mode.

In detail, the controller is configured to: and controlling the compressor 21 to be started, the return air damper 72 to be communicated with the return air duct 84, the air supply damper 71 to be communicated with the air supply duct 81, the defrosting damper 73 to be closed, the fan 6 to be opened, and the defrosting heater 9 to be powered off and closed, so that the refrigerator 100 executes a refrigeration mode.

The controller is further configured to: the compressor 21 is controlled to be closed, the return air duct 84 is closed by the return air damper 72, the cooling air duct 81 is closed by the air supply damper 71, the defrosting air damper 73 is controlled to be communicated with the defrosting air duct, the fan 6 is started, and the defrosting heater 9 is switched on and off by power supply, so that the refrigerator 100 executes a defrosting mode. At this time, in the defrosting mode, the heat generated by the defrosting heater 9 does not enter the storage compartment 11, the temperature stability of the storage compartment 11 is ensured, and the defrosting efficiency can be improved.

Further, in the present embodiment, the airflow driving portion 84 has the third outlet 61 formed on the upper end surface 501 of the heat insulating layer 5; the cooling air duct 81 is connected to the third outlet 61, and the air supply damper 71 is provided at the third outlet 61. Thus, when the refrigerator 100 is in the defrosting mode, the air supply damper 71 closes the air supply duct 81, so that the hot air flow at the air flow driving portion 84 can be prevented from entering the air supply duct 81, and unnecessary heat loss and temperature fluctuation of the storage compartment 11 can be avoided.

Similarly, the air return duct 84 is formed below the air duct member, specifically between the air duct member and the inner container of the box body 1; the return air damper 72 is disposed at a lower front inlet 122 of the refrigeration compartment 12, the inlet 122 being specifically located at a lower rear edge of the duct member. Thus, when the refrigerator 100 is in the defrosting mode, the return air damper 72 closes the return air duct 84, so that hot air at the refrigerating compartment 12 can be prevented from entering the return air duct 84, and unnecessary heat loss and temperature fluctuation of the storage compartment 11 can be avoided.

Further, the air duct member further includes a front cover plate 4 located on the front side of the insulating layer 5, the air cooling duct 81 is at least partially located between the insulating layer 5 and the front cover plate 4, a plurality of air supply ports 810 are formed in the front cover plate 4, and the air cooling duct 81 is communicated with the storage compartment 11 through the air supply ports 810. Therefore, the air cooling duct 81 and the defrosting duct are separated from the front side and the rear side of the heat preservation layer 5, namely the heat preservation layer 5 is clamped between the air cooling duct 81 and the defrosting duct. In this way, when the refrigerator 100 performs the defrosting mode, the heat insulating layer 5 can prevent heat in the defrosting air duct from being conducted to the cool air supply duct 81, thereby further preventing unnecessary heat loss and temperature fluctuation of the storage compartment 11.

In addition, in the present embodiment, the return air damper 72 is provided as a shutter which is electrically rotatably attached to the rear edge of the lower end of the duct member, and similarly, the defrosting damper 73 and the supply air damper 71 are also provided as a shutter which is electrically rotatably attached to the insulating layer 5. Of course, the structure of the dampers is not limited thereto.

Compared with the prior art, the air-cooled refrigerator 100 of the embodiment is provided with the defrosting air channel, so that circulating air flow between the refrigerating chamber 12 and the defrosting air channel can be realized while the defrosting heater 9 heats and defrosts, wind heat defrosting of the evaporator 22 is realized by the circulating air flow, and uniform and rapid defrosting of the surface of the evaporator 22 is facilitated; moreover, the first air outlet 831 and the second air outlet 832 of the defrosting air channel are separately arranged on two opposite sides of the evaporator 22, and air outlet directions are different, so that a rotational flow can be formed around the evaporator 22 in the cooling chamber 12, the surface uniformity and the quickness of the evaporator 22 are further improved, the heating duration of the defrosting heater 9 is shortened, and energy conservation and consumption reduction are achieved.

Referring to fig. 7 and 8, another embodiment of the present invention is different from the embodiment shown in fig. 1 to 6 only in that: the air outlet direction of the first air outlet.

Specifically, different from the case that the air outlet directions of the first air outlet 831 and the second air outlet 832 in the embodiment of fig. 6 have a non-zero included angle, in this embodiment, the first air outlet 831 ' and the second air outlet 832 ' of the defrosting air duct are inclined to the same direction as the evaporator 22 ' to output air, so, referring to fig. 8, the air flow V1 ' outputting air through the first air outlet 831 ' and the air flow V2 ' outputting air through the second air outlet 832 ' can form a rotational flow around the evaporator 22 ' in the refrigeration chamber, thereby ensuring uniform and rapid defrosting of the surface of the evaporator 22 ', shortening the heating time of the defrosting heater, saving energy, and reducing consumption.

In detail, the first air outlet 831 'is a rectangular hollow inclined cylinder which penetrates through the rear cover plate 3' from front to back and extends obliquely from the rear to the outside, and the oblique rear to the outside is far away from the evaporator 22 ', namely the air outlet direction is from the left front to the right rear, and the air outlet direction faces to the right outer space far away from the right end face of the evaporator 22'; the second outlet 832 'is a rectangular hollow oblique cylinder which penetrates the rear cover plate 3' from front to back and extends obliquely rearward and inward, and the oblique rear and inward air is discharged toward the evaporator 22 ', that is, the air discharge direction is from the front left to the rear right, and the air discharge direction is toward the surface of the evaporator 22'. In this way, a circulating flow around the periphery of the evaporator 22 'can be formed, the uniformity of surface defrosting of the evaporator 22' can be improved, and the defrosting rate can be increased.

In addition, in another variation, the air outlet of the first air outlet and the air outlet of the second air outlet may also be: the first air outlet is obliquely arranged at the rear outer side and far away from the air outlet of the evaporator, the second air outlet is obliquely arranged at the rear inner side and faces the air outlet of the evaporator, the first air outlet and the second air outlet are obliquely arranged relative to the evaporator, but the air outlet directions are different (namely non-equidirectional air outlet), rotational flows around the evaporator can be formed, the surface defrosting uniformity of the evaporator is improved, and the defrosting speed is improved. This variant differs from the embodiment shown in fig. 6 in that: the first air outlet is inclined backwards and outwards and is far away from the evaporator to output air, and the air is not output from the front to the back as shown in fig. 6. This variant differs from the embodiment shown in fig. 8 in that: the air outlet of the first outlet and the air outlet of the second outlet are not the same (i.e. the inclination angles of the first outlet and the second outlet are different from the front-back direction), but are not the same as the inclination angles shown in fig. 8.

The detailed description set forth above is only a specific description of the feasible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. An air-cooled refrigerator comprises a refrigerator body, an air duct component, a fan, a refrigerating system and a defrosting heater, wherein the refrigerator body defines a refrigerating chamber, and the refrigerating chamber contains an evaporator of the refrigerating system; it is characterized in that the preparation method is characterized in that,

2. The air-cooled refrigerator according to claim 1, wherein the air duct member is provided at a front side of the cooling compartment;

3. The air-cooled refrigerator of claim 2 wherein the airflow driving part has a first outlet and a second outlet;

4. The air-cooled refrigerator according to claim 3, wherein the air duct member includes a heat insulating layer and a rear cover plate attached to a rear wall surface of the heat insulating layer;

5. The air-cooled refrigerator according to claim 4, wherein the first sub-duct is provided as a first groove formed in a rear wall surface of the insulating layer, the first outlet is provided as a hollow straight tube which penetrates the rear cover plate from front to rear and extends vertically rearward, and the straight tube corresponds to a front-rear position of the first groove;

6. The air-cooled refrigerator according to claim 5, wherein at least a part of the first grooves extend vertically lengthwise, and the number of the straight tubes is plural vertically spaced along the first grooves;

7. The air-cooled refrigerator of claim 1, wherein the defrosting heater is disposed in the defrosting air duct.

8. The air-cooled refrigerator according to claim 7, wherein the defrosting air duct includes a first sub air duct and a second sub air duct, the first sub air duct and the second sub air duct are independent from each other, and the defrosting heater is disposed in each of the first sub air duct and the second sub air duct.

9. The air-cooled refrigerator according to any one of claims 1 to 8, wherein the refrigerator body further defines a storage compartment;

10. The air-cooled refrigerator according to claim 9, wherein the air duct member comprises a heat insulating layer, a rear cover plate attached to a rear wall surface of the heat insulating layer, and a front cover plate positioned on a front side of the heat insulating layer;

the air return duct is formed below the air duct component;

11. The air-cooled refrigerator of claim 9 further comprising a controller configured to: