CN111609633A

CN111609633A - Air-cooled refrigerator

Info

Publication number: CN111609633A
Application number: CN201910143342.1A
Authority: CN
Inventors: 苗建林; 刘会; 李春阳; 王铭
Original assignee: Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Co Ltd
Priority date: 2019-02-26
Filing date: 2019-02-26
Publication date: 2020-09-01
Anticipated expiration: 2039-02-26
Also published as: CN111609633B

Abstract

The present invention provides an air-cooled refrigerator, which includes: an evaporator chamber for arranging an evaporator, a bottom of which is formed with a drain port for draining defrosted water; a backflow prevention assembly arranged at the drain outlet and provided with a drain hole, wherein a water storage component is arranged below the drain hole, and the water storage component is configured to enable part of defrosted water to remain at the drain outlet so as to form ice seal at the drain outlet during refrigeration; and the water outlet is used for melting ice formed by the defrosting water and heating the wires so that the defrosting water in the defrosting process is discharged through the water outlet. The air-cooled refrigerator can ensure that the water outlet at the bottom of the evaporator is iced when the air-cooled refrigerator is normally cooled, thereby avoiding the air with higher external temperature from entering the evaporator chamber to exchange heat with the air in the evaporator chamber, and simultaneously avoiding the condition that moisture in the external air enters the evaporator chamber to aggravate the frost formation of the evaporator, thereby ensuring the cooling effect of the air-cooled refrigerator.

Description

Air-cooled refrigerator

Technical Field

The invention relates to the technical field of refrigeration equipment, in particular to an air-cooled refrigerator.

Background

For the air-cooled refrigerator, in the defrosting process, defrosting water on the surface of an evaporator is discharged out of an evaporator chamber through a water discharge opening at the bottom of the evaporator chamber, when the defrosting process is finished and the air-cooled refrigerator is normally refrigerated, outside air can enter the evaporator chamber through the water discharge opening, and the outside air and the air in the evaporator chamber can exchange heat due to the fact that the temperature and the humidity of the outside air are higher than those of the air in the evaporator chamber, moisture in the outside air can enter the evaporator chamber, the frosting degree of the surface of the evaporator is increased, the refrigerating effect is affected, and the power consumption of the air-cooled refrigerator is increased.

Disclosure of Invention

In view of the above, an invention has been developed to provide an air-cooled refrigerator that overcomes or at least partially solves the above-mentioned problems.

An object of the present invention is to provide an air-cooled refrigerator which prevents hot and humid air from intruding into an evaporator chamber.

It is a further object of this invention to improve the space utilization of such air-cooled refrigerators.

The invention provides an air-cooled refrigerator, comprising: an evaporator chamber for arranging an evaporator, the bottom of which is formed with a drain port for draining defrosted water; the backflow prevention assembly is arranged at the water outlet and is provided with a water discharge hole for discharging defrosting water, a water storage component is arranged below the water discharge hole, and the water storage component is configured to enable part of defrosting water to remain at the water outlet so as to form ice seal at the water outlet during refrigeration; and the water outlet heating wire is used for melting ice formed by the defrosting water so as to discharge the defrosting water in the defrosting process through the water outlet.

Optionally, wherein the backflow prevention assembly comprises: the flat plate covers the water drainage port, a plurality of water drainage holes are formed in the flat plate, and a water storage part is arranged below each water drainage hole; a plurality of guide plates, and each guide plate is connected with a water storage part and a water drainage hole.

Optionally, an orthographic projection of each water storage component and the connected diversion plate on the flat plate covers the corresponding drainage hole.

Optionally, the drain heater wire is disposed above the flat plate at a location where no drain hole is disposed.

Alternatively, the plurality of drainage holes are arranged in a square shape, and each guide plate is connected with one side of the drainage hole facing to the same direction.

Optionally, the air-cooled refrigerator is a bottom evaporator air-cooled refrigerator, and a pressure chamber is defined behind the evaporator chamber.

Optionally, each deflector is connected to a side of the drain hole facing the press chamber.

Optionally, the length of each baffle is less than 2 mm, and the angle between each baffle and the flat plate is greater than 6 degrees.

Optionally, the drain heater wire is set to open at the beginning of the defrost flow or at a preset warm-up time threshold before the defrost flow begins.

Optionally, the drain heater wire is closed when the temperature of the evaporator chamber reaches a preset temperature threshold after opening.

The present invention provides an air-cooled refrigerator, which includes: an evaporator chamber for arranging an evaporator, a bottom of which is formed with a drain port for draining defrosted water; the backflow prevention assembly is arranged at the water outlet and is provided with a water outlet for discharging defrosting water, a water storage component is arranged below the water outlet and is configured to enable part of defrosting water to remain at the water outlet so as to form ice seal at the water outlet during refrigeration; and the water outlet is used for melting ice formed by the defrosting water and heating the wires so that the defrosting water in the defrosting process is discharged through the water outlet. The air-cooled refrigerator can ensure that the water outlet at the bottom of the evaporator is iced when the air-cooled refrigerator is normally cooled, thereby avoiding the air with higher external temperature from entering the evaporator chamber to exchange heat with the air in the evaporator chamber, and simultaneously avoiding the condition that moisture in the external air enters the evaporator chamber to aggravate the frost formation of the evaporator, thereby ensuring the cooling effect of the air-cooled refrigerator. And in the defrosting process, the water outlet is used for heating wires to melt ice at the water outlet, so that the defrosting water in the evaporator chamber can be discharged out of the evaporator chamber through the water outlet.

Furthermore, the air-cooled refrigerator is the air-cooled refrigerator with the evaporator arranged at the bottom, the press chamber is limited behind the evaporator chamber, and the evaporator of the air-cooled refrigerator is arranged at the bottom of the air-cooled refrigerator, so that the depth of each storage chamber of the air-cooled refrigerator can be ensured to be consistent, and the use convenience of a user is improved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic view of an air-cooled refrigerator according to one embodiment of the present invention;

fig. 2 is a partial sectional view of an air-cooled refrigerator according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of FIG. 2;

fig. 4 is a plan view of a backflow preventing assembly of an air-cooled refrigerator according to an embodiment of the present invention;

fig. 5 is a front view of a backflow preventing assembly of an air-cooled refrigerator according to an embodiment of the present invention;

fig. 6 is another perspective view of a backflow preventing assembly of an air-cooled refrigerator according to an embodiment of the present invention;

fig. 7 is a flowchart of a defrost control method of an air-cooled refrigerator according to an embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic view of an air-cooled refrigerator 10 according to an embodiment of the present invention, in which a door body, an evaporator chamber cover plate, internal components of a storage space, such as drawers, shelves, etc., are hidden to show components provided inside an evaporator chamber 200, fig. 2 is a partial sectional view of the air-cooled refrigerator 10 according to an embodiment of the present invention, and fig. 3 is a partial schematic view of fig. 2, in which the partial sectional view shown in fig. 2 is a bottom side sectional view of the air-cooled refrigerator 10.

The present embodiment provides an air-cooled refrigerator 10 with an evaporator chamber 200 located at the lower part of the inner side of a freezing inner container 110, the air-cooled refrigerator 10 generally may include a box body 100, the box body 100 includes an outer shell and a storage inner container arranged at the inner side of the outer shell, a space between the outer shell and the storage inner container is filled with a thermal insulation material (forming a foaming layer), a storage compartment is defined in the storage inner container, the storage inner container may generally include the freezing inner container 110, a refrigerating inner container 120 and the like, the freezing inner container 110 is located below the refrigerating inner container 120, and the storage compartment includes a freezing chamber 111 defined in the freezing inner container 110 and a refrigerating chamber 121 defined in the refrigerating inner container 120.

As can be appreciated by those skilled in the art, the refrigerator according to the embodiment of the present invention may further include an evaporator 210, a blower fan 220, a compressor, a condenser, and a throttling element (not shown), etc. The evaporator 210 is connected to the compressor, the condenser, and the throttle element via refrigerant lines to form a refrigeration cycle, and is cooled when the compressor is started to cool air flowing therethrough.

In particular, in the present embodiment, the freezing compartment 110 is located at the lower portion of the cabinet 100, the lower portion of the inner side thereof defines the evaporator chamber 200, the evaporator 210 is disposed in the evaporator chamber 200, the blower 220 is disposed in the evaporator chamber 200 and at the rear side of the evaporator 210, the storage compartment is defined above the evaporator chamber 200 in the storage compartment, and the blower 220 is configured to promote the flow of the cold air cooled by the evaporator 210 to the storage compartment.

In some embodiments, the storage compartment may also include a temperature-changing compartment directly above the freezer compartment 111, as is well known to those skilled in the art, the temperature in the refrigerator compartment 121 being typically between 2 ℃ and 10 ℃, preferably 4 ℃ to 7 ℃. The temperature in the freezing chamber 111 is generally in the range of-22 c to-14 c. The temperature-changing chamber can be adjusted to-18 ℃ to 8 ℃ at will. The optimum storage temperatures for different kinds of articles are different and the suitable storage locations are different, for example, fruit and vegetable foods are suitable for storage in the refrigerating compartment 121 and meat foods are suitable for storage in the freezing compartment 111.

In the traditional refrigerator, the freezing chamber 111 is generally positioned at the lowest part of the refrigerator, so that the position of the freezing chamber 111 is lower, a user needs to bend down or squat greatly to carry out the operation of taking and placing articles on the freezing chamber 111, and the refrigerator is inconvenient for the user to use and especially inconvenient for the old to use. In the embodiment, the evaporator chamber 200 is arranged in the lower space inside the freezing liner 110, so that the evaporator chamber 200 occupies the lower space inside the freezing liner 110, the height of the freezing chamber 111 is increased, the degree of bending of a user when the user takes and places articles in the freezing chamber 111 is reduced, the use experience of the user is improved, and the space utilization rate is improved.

A drain port 230 for discharging defrost water is formed at the bottom of the evaporator chamber 200, a drain pipe 240 is provided below the drain port 230, the drain pipe 240 is connected to the compressor chamber 300 at the rear of the evaporator chamber 200, a drain pan for discharging defrost water into the compressor chamber 300, water in the drain pan is evaporated by the temperature of the compressor chamber 300, in other embodiments of the present invention, the drain pipe 240 is inserted into the drip tray, and when the water in the drip tray is higher than the nozzle of the end of the drain pipe 240 connected to the pressure chamber 300, a water-blocking drain pipe 240 is connected to a nozzle at one end of the compressor chamber 300 by means of water in the water receiving pan, to prevent external hot and humid air from entering the evaporator chamber 200, however, the defrosting water in the water pan is evaporated by the heat of the compressor, the water in the water pan is not always higher than the pipe orifice of the water discharge pipe 240 connected to one end of the compressor chamber 300, the method of preventing the external hot and humid air from entering the evaporator chamber 200 is not efficient.

The air-cooled refrigerator 10 provided by the embodiment of the present invention further includes a backflow prevention assembly 400, fig. 4 is a plan view of the backflow prevention assembly 400 of the air-cooled refrigerator 10 according to one embodiment of the present invention, fig. 5 is a front view of the backflow prevention assembly 400 of the air-cooled refrigerator 10 according to one embodiment of the present invention, and fig. 6 is another perspective view of the backflow prevention assembly 400 of the air-cooled refrigerator 10 according to one embodiment of the present invention, wherein the perspective view shown in fig. 6 is a lower front perspective view of the backflow prevention assembly 400.

The backflow prevention assembly 400 is disposed at the drain opening 230, the backflow prevention assembly 400 includes a flat plate 430 covering the drain opening 230, a plurality of drain holes 410 for discharging defrosted water are formed on the flat plate 430, a water storage member 420 is disposed below each drain hole 410, the water storage member 420 is configured to allow part of defrosted water to remain at the drain opening 230 so as to form an ice seal at the drain opening 230 during refrigeration, the backflow prevention assembly 400 further includes a plurality of guide plates 440, and each drain hole 410 and the water storage member 420 below the drain hole are connected by one guide plate 440.

The orthographic projection of each water storage part 420 and the guide plate 440 connected with the water storage part on the flat plate 430 covers the corresponding water discharge hole 410 to ensure that the defrosted water passing through the water discharge hole 410 of the backflow prevention assembly 400 can be stored on the water storage part 420, in some embodiments of the invention, the orthographic projection area of each water storage part 420 and the guide plate 440 connected with the water storage part on the flat plate 430 is the same as the area of the water discharge hole 410 and just covers the corresponding water discharge hole 410, in other embodiments of the invention, the orthographic projection area of each water storage part 420 and the guide plate 440 connected with the water storage part on the flat plate 430 is larger than the area of the water discharge hole 410 and covers the corresponding water discharge hole 410. If the orthographic projection of the water storage part 420 and the connected guide plate 440 on the flat plate 430 cannot cover the corresponding drain hole 410, the defrosting water may not pass through the water storage part 420 and enter the press chamber 300 through the drain pipe 240, and the water storage part 420 cannot store the defrosting water.

In addition, the water storage component 420 of the present embodiment may be configured as a flat plate, the length of each flow guiding plate 440 is less than 2 mm, the included angle between each flow guiding plate 440 and the flat plate 430 is greater than 6 degrees, the length of the flow guiding plate 440 is set to be less than 2 mm, and the included angle between each flow guiding plate 440 and the flat plate 430 is greater than 6 degrees, so as to ensure that the storage portion can store the frost water and freeze the frost water on the water storage component.

The plurality of drain holes 410 are arranged in a square shape, and each guide plate 440 is connected with one side of the drain hole 410 facing the same direction, so that the arrangement of the guide plates 440 can ensure that defrosting water passing through the plurality of drain holes 410 cannot interfere with each other, and the efficiency of draining the defrosting water in a defrosting process is ensured. In other embodiments of the present invention, the drainage hole 410 may be formed in other shapes, such as a circular shape, and if the drainage hole 410 is formed in a circular shape, the chord of each baffle 440 connected to the drainage hole 410 is located on the same side of the circular drainage hole.

The air-cooled refrigerator 10 of the present embodiment is a bottom-mounted evaporator air-cooled refrigerator, and the pressure chamber 300 is defined behind the evaporator chamber 200, so that the drain pipe 240 has a certain inclination angle with respect to the vertical plane, and in order to ensure that the water storage part 420 and the guide plate 440 also have a certain shielding effect on the external airflow from the drain pipe 240, the guide plate 440 of the air-cooled refrigerator 10 of the present embodiment is connected to the side of the drain hole 410 facing the pressure chamber 300, for example, when the drain hole 410 is square, the guide plate 440 is connected to the side of the drain hole 410 facing the pressure chamber 300 and close to one side of the pressure chamber 300, and the water storage part 420 extends at the bottom of the guide plate 440 facing the.

When the air-cooled refrigerator 10 enters a defrosting process, the compressor stops operating, the fan 220 stops operating, the evaporator heating wires on the evaporator 210 start heating to melt frost accumulated on the surface of the evaporator 210, the frost accumulated on the surface of the evaporator 210 is turned into defrosting water under the action of the evaporator heating wires, the defrosting water flows into the drain pipe 240 through the drain hole 410 on the backflow prevention assembly 400 and is drained to the water pan in the press chamber 300 through the drain pipe 240, so that the defrosting water is evaporated into water vapor under the action of the temperature of the press chamber 300 and is drained to the external space.

When the defrosting water passes through the water storage part 420 on the backflow prevention assembly 400, a small amount of water is stored in the water storage part 420, and in the later stage of the defrosting process, along with the reduction of the defrosting water, the speed of the defrosting water passing through the backflow prevention assembly 400 becomes lower, and at the moment, the defrosting water flows into the water storage part 420 along the guide plate 440 more easily so as to remain on the water storage part 420. As the defrosting process is completed, the air-cooled refrigerator 10 cools normally, the compressor operates, the blower 220 operates, the evaporator heater wire stops heating, and as the air-cooled refrigerator 10 operates to cool, the temperature of the evaporator chamber 200 decreases, and the defrosting water remaining on the water storage part 420 freezes to close the plurality of drain holes 410 of the backflow prevention assembly 400, thereby preventing external hot and humid air from entering the evaporator chamber 200 through the drain holes 410.

The air-cooled refrigerator 10 of the present embodiment further includes a drain outlet heater (not shown) for melting ice formed by the defrosting water, so that the defrosting water in the defrosting process is drained through the drain outlet 230. In some embodiments of the present invention, the drain opening heating wire is turned on when a preset heating time threshold T1 is reached before the defrosting process is started, the heating time threshold T1 may be determined by actual measurement of the air-cooled refrigerator 10, the heating time threshold T1 may be any value within 2 to 10 minutes, for example, 2 minutes, 5 minutes, 10 minutes, etc., and the defrosting process is started when the time that the compressor runs from the end of the last defrosting process reaches the compressor time threshold T2, the compressor time threshold T2 may be determined by actual measurement of the air-cooled refrigerator 10, the compressor time threshold T2 may be any value within 1 to 3 hours, for example, 1 hour, 2 hours, 3 hours, etc., and then the drain opening heating wire is turned on when the time that the compressor runs from the end of the last defrosting process reaches the difference T2-T1 between the compressor time threshold T2 and the heating time threshold T1, for example, when the heating time threshold T1 is 5 minutes and the compressor time threshold T2 is 2 hours, the drain heater wire is turned on when the time of the compressor running from the end of the last defrosting process reaches 115 minutes.

In other embodiments of the present invention, the drain opening heater is set to be turned on when the defrosting process is started, and when the air-cooled refrigerator 10 enters the defrosting process, the drain opening heater is turned on to remove ice at the backflow prevention assembly 400 by using heat provided by the drain opening heater and an impact action of defrosting water, so as to ensure that the defrosting water can enter the water pan in the compressor chamber 300 through the backflow prevention assembly 400.

And, the drain outlet heater wire is closed when the temperature of the evaporator chamber 200 reaches a preset temperature threshold E1 after being opened to save energy, the temperature threshold E1 may be determined by actual measurement of the air-cooled refrigerator 10, and the temperature threshold E1 may be any value of 2 to 8 degrees celsius, for example, 2 degrees celsius, 5 degrees celsius, 8 degrees celsius, and the like.

The air-cooled refrigerator 10 provided by the embodiment of the invention is a bottom evaporator air-cooled refrigerator, and for the bottom evaporator air-cooled refrigerator, because the evaporator heating wire may damage components on the bottom surface of the air-cooled refrigerator 10, the evaporator heating wire may be made of a heating wire material with a lower heating temperature, such as an aluminum heating wire, and the like, and the temperature of the evaporator heating wire is not enough to melt ice on the backflow preventing component 400, a water outlet heating wire is arranged at a position, which is not provided with the water drain hole 410, above the flat plate 430 of the backflow preventing component 400 of the air-cooled refrigerator 10, so that the ice on the backflow preventing component 400 is melted by using the temperature of the water outlet heating wire.

In other embodiments of the present invention, the air-cooled refrigerator 10 may be other air-cooled refrigerators 10 besides a bottom-mounted evaporator air-cooled refrigerator. And for the non-bottom evaporator air-cooled refrigerator, the backflow prevention assembly 400 may not be provided with a drain outlet heater strip to melt ice on the backflow prevention assembly 400 by using heat radiation of the evaporator heater strip, and the drain outlet heater strip may also be provided to further ensure the effect of melting ice on the backflow prevention assembly 400.

Fig. 7 is a flowchart of a defrost control method of the air-cooled refrigerator 10 according to one embodiment of the present invention. As shown in fig. 7, the flow of the defrosting control method of the air-cooled refrigerator 10 according to the embodiment of the present invention may include:

step S702: the air-cooled refrigerator 10 operates in a cooling mode. When the air-cooled refrigerator 10 is operated for cooling, the compressor is operated, the evaporator heating wire is not turned on, the fan 220 is operated, air with higher temperature exchanges heat in the evaporator chamber 200 under the action of the fan 220 to become low-temperature air, and then the low-temperature air enters the refrigerating chamber 121 and the freezing chamber 111.

Step S704: the operating time T of the compressor is acquired. The running time of the compressor is the running time of the compressor after the last defrosting process is finished.

Step S706: t > T2-T1. Where T is the obtained compressor running time, T2 is a compressor time threshold, T2 may be determined by actual measurement of the air-cooled refrigerator 10, T2 may be any value from 1 to 3 hours, for example, 1 hour, 2 hours, 3 hours, etc., T1 is a heating time threshold, T1 may be determined by actual measurement of the air-cooled refrigerator 10, and T1 may be any value from 0 to 10 minutes, for example, 2 minutes, 5 minutes, 10 minutes, etc. If T is greater than T2-T1, go to step S708, otherwise go to step S704.

Step S708: and opening a water outlet heating wire. The heat of the drain outlet heating wire is used to heat the ice on the backflow prevention assembly 400, so as to ensure that the defrosting water can enter the press chamber 300 through the backflow prevention assembly 400 during the defrosting process.

Step S710: and judging T > T2. Where T is the obtained compressor running time, T2 is the compressor time threshold, T2 may be determined by actual measurement of the air-cooled refrigerator 10, and the compressor time threshold T2 may be any value from 1 to 3 hours, for example, 1 hour, 2 hours, 3 hours, and the like. If T is greater than T2, go to step S712, otherwise go to step S704.

Step S712: the air-cooled refrigerator 10 enters a defrosting process. The evaporator heater is turned on, the compressor stops operating, the blower fan 220 stops operating, frost on the surface of the evaporator 210 is melted by the temperature of the evaporator heater, and the defrosting water enters the drain pipe 240 through the backflow prevention assembly 400 at the drain port 230 at the bottom of the evaporator chamber 200 and enters the compressor chamber 300 through the drain pipe 240, evaporates under the temperature of the compressor chamber 300, and is discharged out of the air-cooled refrigerator 10.

The heating time threshold T1 of the air-cooled refrigerator 10 of this embodiment may be any value within 0 to 10 minutes, wherein the drain heater is turned on when the compressor operation time T reaches T2-T1, and the defrosting process of the air-cooled refrigerator 10 is performed when T reaches T2, that is, when T1 takes the value of 0, the air-cooled refrigerator 10 turns on the drain heater and enters the defrosting process, and when T1 takes the value of not 0, the drain heater of the air-cooled refrigerator 10 is turned on before entering the defrosting process.

Step S714: the temperature E of the evaporator chamber is taken. This step can obtain the temperature E of the evaporator chamber by means of a temperature sensor.

Step S716: judgment E > E1. Where E is the temperature sensor to obtain the temperature of the evaporator chamber, E1 is the temperature threshold, E1 may be determined by actual measurement of the air-cooled refrigerator 10, and E1 may be any value of 2 to 8 degrees celsius, for example, 2 degrees celsius, 5 degrees celsius, 8 degrees celsius, and the like. If E is greater than E1, go to step S718, and if E is less than or equal to E1, go to step S724.

Step S718: and closing the water outlet heating wire. Whether the ice on the backflow prevention assembly 400 melts or not is judged by the temperature of the evaporator chamber 200, when E is greater than E1, it is indicated that the ice on the backflow prevention assembly 400 melts, and the defrosting water can pass through, and at the moment, the water outlet heating wire is closed, so that energy is saved, and potential safety hazards are avoided.

Step S720: and acquiring the running time W of the defrosting process. The time until the air-cooled refrigerator 10 enters the defrosting process in step S712 is acquired.

Step S722: w > W1 is judged. Where W is the operating time of the defrosting process, W1 is the defrosting process time threshold, W1 can be determined by actual measurement of the air-cooled refrigerator 10, and W1 can be any value from 5 to 30 minutes, such as 5 minutes, 10 minutes, 30 minutes, and the like. If W is greater than W1, the process returns to step S702, and if W is less than or equal to W1, the process returns to step S720.

Step S724: and acquiring the running time W of the defrosting process. The time until the air-cooled refrigerator 10 enters the defrosting process in step S712 is acquired.

Step S726: w > W1 is judged. Where W is the operating time of the defrosting process, W1 is the defrosting process time threshold, W1 can be determined by actual measurement of the air-cooled refrigerator 10, and W1 can be any value from 5 to 30 minutes, such as 5 minutes, 10 minutes, 30 minutes, and the like. If W is greater than W1, go to step S728, and if W is less than or equal to W1, return to step S724.

Step S728: and closing the water outlet heating wire. The drain outlet heating wire is closed and step S702 is re-executed.

In the flow of the defrosting control method of the air-cooled refrigerator 10 according to the embodiment of the present invention, the drain outlet heater strip may be turned on when the defrosting flow starts or when a preset heating time threshold before the defrosting flow starts, and the drain outlet heater strip may be turned on when a preset heating time threshold before the defrosting flow starts, so as to ensure that ice on the backflow prevention assembly 400 is melted when the defrosting flow starts, and defrosting water may be discharged from the evaporator chamber 200, and the drain outlet heater strip may also be turned on when the defrosting flow starts, and ice on the backflow prevention assembly is removed by using the heat of the drain outlet heater strip and the impact of the defrosting water together, so as to save energy and reduce potential safety hazards.

The present invention provides an air-cooled refrigerator 10, which includes: an evaporator chamber 200 for arranging the evaporator 210, a bottom of which is formed with a drain port 230 for draining the defrosting water; a backflow prevention assembly 400 disposed at the drain port 230 and provided with a drain hole 410 for draining the defrosted water, wherein a water storage part 420 is disposed below the drain hole 410, and the water storage part 420 is configured to allow part of the defrosted water to remain at the drain port 230 so as to form an ice seal at the drain port 230 during refrigeration; the drain port for melting ice formed by the defrost water heats the wire so that the defrost water in the defrost process is discharged through the drain port 230. The air-cooled refrigerator can ensure that the water outlet 230 at the bottom of the evaporator is iced during normal refrigeration, thereby preventing air with higher external temperature from entering the evaporator chamber 200 to exchange heat with air in the evaporator chamber 200, and simultaneously preventing moisture in the external air from entering the evaporator chamber 200 to aggravate the condition that the evaporator 210 is frosted, thereby ensuring the refrigeration effect of the air-cooled refrigerator 10. And in the defrosting process, the ice at the drain outlet 230 is melted by using the drain outlet heater wire, so that the defrosting water in the evaporator chamber 200 can be discharged out of the evaporator chamber 200 through the drain outlet 230.

Further, the air-cooled refrigerator 10 of the present invention is a bottom-mounted evaporator air-cooled refrigerator, and the pressure chamber 300 is defined behind the evaporator chamber 200, and the evaporator 210 of the air-cooled refrigerator 10 is disposed at the bottom of the air-cooled refrigerator 10, so that the depth of each storage compartment of the air-cooled refrigerator 10 can be ensured to be consistent, and the convenience of use for users can be improved.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. An air-cooled refrigerator comprising:

an evaporator chamber for arranging an evaporator, the bottom of which is formed with a drain port for draining defrosted water;

the backflow prevention assembly is arranged at the water drainage port and is provided with a water drainage hole for discharging the defrosting water, a water storage component is arranged below the water drainage hole, and the water storage component is configured to enable part of the defrosting water to remain at the water drainage port so as to form ice seal at the water drainage port during refrigeration;

and the water outlet heating wire is used for melting ice formed by the defrosting water so as to discharge the defrosting water in the defrosting process through the water outlet.

2. The air-cooled refrigerator of claim 1, wherein the backflow prevention assembly comprises:

the flat plate covers the water drainage port, a plurality of water drainage holes are formed in the flat plate, and a water storage part is arranged below each water drainage hole;

and each guide plate is connected with one water storage part and one water drainage hole.

3. The air-cooled refrigerator of claim 2, wherein the air-cooled refrigerator is a refrigerator that uses air as a refrigerant

And the orthographic projection of each water storage part and the guide plate connected with the water storage part on the flat plate covers the corresponding water drainage hole.

4. The air-cooled refrigerator of claim 2, wherein the air-cooled refrigerator is a refrigerator that uses air as a refrigerant

The drain outlet heating wires are arranged at the positions, which are not provided with the drain holes, above the flat plate.

5. The air-cooled refrigerator of claim 2, wherein the air-cooled refrigerator is a refrigerator that uses air as a refrigerant

The plurality of drain holes are arranged in a square shape, and each guide plate is connected with one side of each drain hole facing the same direction.

6. The air-cooled refrigerator of claim 2, wherein the air-cooled refrigerator is a refrigerator that uses air as a refrigerant

The air-cooled refrigerator is an air-cooled refrigerator with an evaporator arranged at the bottom, and a press chamber is limited behind the evaporator chamber.

7. The air-cooled refrigerator of claim 6, wherein the air-cooled refrigerator is provided with a cooling fan

Each guide plate is connected with one side of the water discharge hole facing the press chamber.

8. The air-cooled refrigerator of claim 2, wherein the air-cooled refrigerator is a refrigerator that uses air as a refrigerant

Each guide plate is less than 2 millimeters in length, and each guide plate with the contained angle of dull and stereotyped is greater than 6 degrees.

9. The air-cooled refrigerator of claim 1, wherein the air-cooled refrigerator is a refrigerator that uses air as a cooling medium

The drain outlet heating wire is set to be opened when the defrosting process is started or when a preset heating time threshold value is obtained before the defrosting process is started.

10. The air-cooled refrigerator of claim 7, wherein the air-cooled refrigerator is a refrigerator with a fan

And the water outlet heating wire is closed when the temperature of the evaporator chamber reaches a preset temperature threshold value after being opened.