CN108759242B

CN108759242B - Refrigerator, control system and control method thereof

Info

Publication number: CN108759242B
Application number: CN201810433678.7A
Authority: CN
Inventors: 娄喜才; 王铭; 李春阳; 苗建林
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: 2017-06-29
Filing date: 2018-05-08
Publication date: 2021-11-26
Anticipated expiration: 2038-05-08
Also published as: CN109442841A; CN107314612A; CN108826793A; CN109442841B; CN108759242A; CN108826793B

Abstract

The invention discloses a refrigerator, a control system and a control method thereof, wherein the refrigerator comprises a refrigerating chamber, a drying drawer and a humidifying area, wherein the drying drawer and the humidifying area are arranged in the refrigerating chamber, the drying drawer is independent of the humidifying area, a condensation metal plate is arranged in the drying drawer, a dehumidifying fan which enables air in the drying drawer to flow to the condensation metal plate is arranged in the drying drawer, the refrigerator further comprises a humidifier which can be controlled to humidify the humidifying area, and condensation generated on the condensation metal plate supplies water to the humidifier. The dehumidification effect of the drawer in the refrigerating chamber is better, and the dehumidified condensed dew is used for adding water to the humidifier without adding water to a user, so that the convenience of the user is greatly improved, and the user experience is better.

Description

Refrigerator, control system and control method thereof

Technical Field

The invention relates to the technical field of household appliances, in particular to a refrigerator, a control system and a control method thereof.

Background

Generally, a refrigerator comprises a temperature-changing chamber, wherein a circulating air duct is arranged in or outside the temperature-changing chamber, and at least a fan, an evaporator, a heating wire and a temperature sensor are arranged on the circulating air duct; after the fan is started, air is pushed to the temperature-changing chamber through the air supply outlet by the fan, and then returns to the air return inlet through the temperature-changing chamber, humid air in the temperature-changing chamber enters the evaporator, is condensed or frozen by the evaporator and becomes dry air, and then is sent to the temperature-changing chamber through the air supply outlet, so that the circulating transmission of the air is completed, and meanwhile, the dehumidification control of the temperature-changing chamber is realized. In this technique, the dehumidification effect is very poor.

Disclosure of Invention

The invention aims to provide a refrigerator, a control system and a control method thereof, so that the dehumidification effect of a drawer in a refrigerating chamber is better, the dehumidified condensed water is used for adding water to a humidifier, water is not required to be added by a user, the convenience of the user is greatly improved, and the user experience is better.

In order to achieve one of the above objects, according to one embodiment of the present invention, there is provided a refrigerator including a refrigerating chamber, a drying drawer and a humidifying region, the drying drawer being provided in the refrigerating chamber and being independent of the humidifying region, wherein a condensation metal plate is provided in the drying drawer, a dehumidifying fan is provided in the drying drawer to allow air in the drying drawer to flow to the condensation metal plate, the refrigerator further includes a humidifier capable of controllably humidifying the humidifying region, and condensation generated on the condensation metal plate supplies water to the humidifier.

As a further improvement of the embodiment of the present invention, the refrigerator further includes an evaporator, an air duct, an air outlet provided between the air duct and the refrigerating chamber, a damper capable of selectively opening or closing the air outlet, and a humidifier water box for supplying water to the humidifier, wherein a defrosting water receiving container for receiving defrosting water is provided below the evaporator, and the defrosting water receiving container is communicated with the humidifier water box through a defrosting water pipe.

As a further improvement of the embodiment of the invention, the pipe diameter of the defrosting water pipe gradually increases from the position adjacent to the defrosting water receiving container to the position adjacent to the humidifier water box.

As a further improvement of the embodiment of the present invention, the refrigerator further includes a condensed water receiving container for collecting condensed water generated on the condensed water metal plate, the humidifier water box is communicated with the humidifier through a water inlet pipe, and the humidifier water box is communicated with the condensed water receiving container through a condensed water pipe.

As a further improvement of the embodiment of the invention, the refrigerator further comprises a drain pipe and a water pan, the drain pipe comprises a U-shaped pipe part and heating wires arranged on the periphery of the U-shaped pipe part, one end of the drain pipe is communicated with the humidifier water box, the other end of the drain pipe is arranged on the water pan, the refrigerator further comprises a main control board, the main control board respectively controls the opening or closing of the air door and the dehumidification fan, and the main control board is electrically connected with the heating wires to control the heating wires to be heated or stop heating.

As a further improvement of the embodiment of the invention, in the vertical direction, the connection point between the drain pipe and the humidifier water box is higher than the connection point between the condensate pipe and the humidifier water box, and a one-way permeable membrane is arranged at the position of the condensate pipe, which is adjacent to the pipe orifice of the humidifier water box, so as to ensure that water can only flow from the condensate water receiving container to the humidifier water box, and prevent water vapor in the humidifier water box from entering the condensate water receiving container.

As a further improvement of the embodiment of the present invention, the main control board calculates the maximum dew point humidity according to the temperature in the humidification region, and the main control board controls the humidifier to operate until the humidity in the humidification region is adjacent to and less than the maximum dew point humidity.

As a further improvement of the embodiment of the present invention, the refrigerator further includes a freezing chamber, the evaporator includes a refrigerating evaporator for supplying cold to the refrigerating chamber and a freezing evaporator for supplying cold to the freezing chamber, the refrigerating evaporator delivers cold air to the condensation metal plate through the air outlet, and the U-shaped pipe portion is disposed adjacent to the freezing evaporator.

As a further improvement of the embodiment of the present invention, the humidifying area is provided as a humidifying drawer sealed with respect to the refrigerating chamber, and a humidifying fan for making the humidity in the humidifying drawer uniform is provided in the humidifying drawer.

As a further improvement of the embodiment of the present invention, the humidifying area is provided to be opened to the refrigerating chamber.

As a further improvement of the embodiment of the present invention, the drying drawer further includes a partition board, the partition board divides the drying drawer into a condensation space and a storage space for placing articles, an air inlet penetrating through the condensation space and the storage space is formed in the partition board, the dehumidification fan is disposed in the condensation space, the condensation metal plate is exposed in the condensation space, and the dehumidification fan sucks air in the storage space into the condensation space through the air inlet and flows to the condensation metal plate.

In order to achieve one of the above objects, another embodiment of the present invention further provides a control system of a refrigerator, the refrigerator includes a refrigerating chamber, a drying drawer and a humidifying area, the drying drawer is disposed in the refrigerating chamber, and the drying drawer is independent from the humidifying area, wherein a condensation metal plate is disposed in the drying drawer, a dehumidifying fan is disposed in the drying drawer for making air in the drying drawer flow to the condensation metal plate, the refrigerator further includes a humidifier, condensation generated on the condensation metal plate supplies water to the humidifier, the control system includes a main control board, the main control board controls the dehumidifying fan to be turned on or off, and the main control board controls the humidifier to be turned on/off to humidify/stop humidifying the humidifying area.

In order to achieve one of the above objects, a further embodiment of the present invention further provides a control method of the control system of the refrigerator in the above technical solution, where the refrigerator further includes an evaporator, an air duct, an air outlet provided between the air duct and the refrigerating chamber, and a damper capable of selectively opening or closing the air outlet, the control method includes a dehumidification method after opening a drying drawer, and the dehumidification method after opening the drying drawer includes the following steps:

s1, judging whether dehumidification is in progress;

s2, if the judgment result in the step S1 is yes, judging whether the accumulated dehumidification time reaches the preset time, if so, closing the dehumidification fan to stop the air flow in the drying drawer, closing the air door, and if not, ending the program and continuing the dehumidification;

s3, when the judgment result in the step S1 is negative, the cumulative time for closing the drawer is calculated;

s4, judging whether the accumulated time in the step S3 is larger than a threshold value T1;

s5, if the judgment result in the step S4 is yes, judging whether the temperature of the evaporator is less than 0 ℃, if the judgment result that the temperature of the evaporator is less than 0 ℃ is yes, opening a dehumidification fan to forcibly dry the air in the drawer to flow, and opening an air door to reduce the temperature of the condensation metal plate; if the judgment result that the temperature of the evaporator is less than 0 ℃ is negative, ending the program and stopping dehumidification;

s6, if the judgment result in the step S4 is negative, the program is ended and the dehumidification is stopped.

Compared with the prior art, the invention has the beneficial effects that: according to the technical scheme provided by the invention, the condensation metal plate for condensation is arranged in the drying drawer, so that condensation can be generated on the condensation metal plate when the dehumidifying fan blows the moisture in the drying drawer to the condensation metal plate, and the drawer in the refrigerating chamber achieves a better dehumidifying effect. The generated condensed water is used for adding water to the humidifier, and a user does not need to add water to realize humidification of a humidification area, so that the convenience of the user is greatly improved, and the user experience is better.

Drawings

Fig. 1 is a schematic view of a refrigerator in a first embodiment of the present invention;

FIG. 2 is a schematic perspective view of a drawer in the refrigerator of FIG. 1;

FIG. 3 is an enlarged cross-sectional view A-A of the drawer of FIG. 2;

FIG. 4 is an enlarged cross-sectional view B-B of the drawer of FIG. 2;

FIG. 5 is another perspective view of the drawer of the refrigerator of FIG. 1 with the cover removed;

FIG. 6 is a partially exploded perspective view of the drawer of FIG. 5;

FIG. 7 is a partially exploded, alternate directional perspective view of the drawer of FIG. 5;

FIG. 8 is a schematic view of a drain in the refrigerator of FIG. 1;

FIG. 9 is a schematic flow chart illustrating a dehumidifying method after opening a drawer of a refrigerator according to a first embodiment of the present invention;

fig. 10 is a flowchart illustrating an automatic dehumidifying method of a refrigerator according to a first embodiment of the present invention;

fig. 11 is a flowchart illustrating a drain control method of a refrigerator in accordance with a first embodiment of the present invention;

fig. 12 is a schematic view of a refrigerator in a second embodiment of the present invention;

FIG. 13 is an enlarged cross-sectional view taken at C-C of FIG. 12;

FIG. 14 is an enlarged cross-sectional view taken along line D-D of FIG. 12;

FIG. 15 is an enlarged view of the water box of the humidifier of FIG. 14 with the defrosting water pipe, the condensate pipe, the water inlet pipe and a portion of the drain pipe;

FIG. 16 is a schematic view of the U-shaped tube of the drain pipe of FIG. 14 in the direction E;

fig. 17 is a schematic view of a refrigerator in a third embodiment of the present invention;

FIG. 18 is an enlarged cross-sectional view F-F of FIG. 17;

FIG. 19 is an enlarged sectional view taken along line G-G of FIG. 17;

fig. 20 is a schematic view of a refrigerator in a fourth embodiment of the present invention;

fig. 21 is an enlarged sectional view taken from H-H in fig. 20.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

In the various illustrations of the present application, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for ease of illustration and, thus, are provided to illustrate only the basic structure of the subject matter of the present application.

Also, terms used herein such as "upper," "above," "lower," "below," and the like, denote relative spatial positions of one element or feature with respect to another element or feature as illustrated in the figures for ease of description. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. In addition, the horizontal and vertical directions are referred to directions in a normal use case of the refrigerator.

As shown in fig. 1, a first embodiment of the present invention discloses a refrigerator including a cabinet 20 constituting a refrigerating chamber 22, a refrigerating chamber door for opening and closing the refrigerating chamber 22, a drying drawer 24 provided in the refrigerating chamber 22, an evaporator, an air duct 26, an air outlet 28 provided between the air duct 26 and the refrigerating chamber 22, and a damper (not shown) for selectively opening or closing the air outlet 28.

Referring to fig. 1 and 3, a condensation metal plate 30 is disposed in the drying drawer 24, a dehumidifying fan 32 is disposed in the drying drawer 24 to make air in the drying drawer 24 flow toward the condensation metal plate 30, one side of the condensation metal plate 30 is exposed in the drying drawer 24, the other side of the condensation metal plate 30 can receive cold air blown from the air outlet 28, and a condensation water receiving container 34 for collecting condensation generated on the condensation metal plate 30 is disposed on the drying drawer 24. In the preferred embodiment, the condensed water receiving container is provided as a groove 34.

In addition, the refrigerator further includes a drain pipe 36 and a water receiving tray (not shown), the drain pipe 36 includes a U-shaped pipe portion 38 and heating wires (not shown) provided at the periphery of the U-shaped pipe portion 38, the U-shaped pipe portion 38 is disposed adjacent to the evaporator, and one end of the drain pipe 36 is communicated with the condensed water receiving container 34, and the other end of the drain pipe 36 is provided to the water receiving tray.

In this embodiment, since the drying drawer 24 is provided with the condensation metal plate 30 therein, when the condensation metal plate 30 receives the cool air blown from the air outlet 28, the temperature of the condensation metal plate 30 in the drying drawer 24 is the lowest. Thus, when the dehumidifying fan 32 blows the moisture in the drawer to the condensation metal plate 30, condensation can be generated on the condensation metal plate 30, and the generated condensation water flows to the water receiving tray through the drain pipe 36, so that the refrigerator has a better dehumidifying effect. The invention blows cold air to the condensation metal plate 30 through the evaporator to cause the condensation metal plate 30 to generate condensation, thereby leading the drying drawer 24 in the refrigerating chamber 22 to achieve better dehumidification effect.

The refrigerator also includes a freezer compartment 40, the freezer compartment 40 also being located within the cabinet 20 with the fresh food compartment 22 located above and the freezer compartment 40 located below. In the preferred embodiment, the evaporator comprises a refrigerating evaporator 42 for providing cold for the refrigerating chamber 22 and a freezing evaporator 44 for providing cold for the freezing chamber 40, the refrigerating evaporator 42 delivers cold air to the condensation metal plate 30 through the air outlet 28 to cool the condensation metal plate 30, so that the temperature of the condensation metal plate 30 is lowest in the drying drawer 24, thus, when the dehumidifying fan 32 in the drying drawer 24 starts to work, the moisture in the drying drawer 24 is forced to flow through the condensation metal plate, the moisture is condensed on the condensation metal plate 30, and the condensation water generated on the condensation metal plate 30 is collected to the groove 34 and then flows to the water receiving tray through the drain pipe 36.

Further, the refrigerator includes a refrigerating fan 46 and a freezing fan 48, the refrigerating fan 46 blows cooling energy around the refrigerating evaporator 42 toward the refrigerating chamber 22, and the freezing fan 48 blows cooling energy around the evaporator of the freezing chamber 40 toward the freezing chamber 40.

Of course, the refrigerator may further include the freezing chamber 40 while only one evaporator is provided, i.e., a single system refrigerator. The evaporators supply cold air to the freezer compartment 40 and the refrigerator compartment 22, respectively, and the evaporators deliver the cold air to the condensation metal sheet 30 through the air outlet openings 28, and likewise, the U-shaped tube portion 38 is disposed adjacent the evaporators.

In addition, the U-shaped tube portion 38 is disposed adjacent the refrigeration evaporator 44. Thus, as the condensed water passes through the U-shaped tube, it is frozen within the U-shaped tube by the freezing evaporator 44, thereby keeping the condensed water in a solid state and blocking the drain pipe 36, preventing communication between the inside and the outside, thereby preventing external moisture from entering the drain pipe 36.

When the evaporator defrosts, the heating wires work simultaneously, so that the ice in the melting pipe is melted, the surplus water is discharged, and finally the water level in the U-shaped pipe is kept.

As shown in fig. 3 to 7, the drying drawer 24 further includes a partition 50, the partition 50 divides the drying drawer 24 into a condensation space 52 and a storage space 54 for placing articles, an air inlet 56 penetrating the condensation space 52 and the storage space 54 is disposed on the partition 50, the dehumidifying fan 32 is disposed in the condensation space 52, the condensation metal plate 30 is exposed in the condensation space 52, and the dehumidifying fan 32 sucks air in the storage space 54 into the condensation space 52 through the air inlet 56 and flows to the condensation metal plate 30.

In addition, the projection of the partition 50 on the horizontal plane is located within the projection range of the groove 34 on the horizontal plane, the groove 34 has a bottom, a certain gap is provided between the partition 50 and the bottom, and the air dried by the condensation metal plate 30 enters the storage space 54 through the gap.

The drying drawer 24 further includes a cover 57, a front side plate 58, a left side plate 60, a right side plate 62, a bottom plate 64, and a rear side plate 66, the partition plate 50, a portion of the left side plate 60, and a portion of the right side plate 62 form the condensation space 52, and the front side plate 58, a portion of the left side plate 60, a portion of the right side plate 62, and the partition plate 50 form the storage space 54. The cover 57 covers over the storage space 54 to seal the storage space 54. The condensation metal plate 30 is provided between the partition plate 50 and the rear side plate 66, and the dehumidifying fan 32 is provided on the condensation metal plate 30. Specifically, air gaps are formed between the condensation metal plate 30 and the partition plate 50 and between the condensation metal plate and the rear side plate 66, and the dehumidification fan 32 is arranged opposite to the air inlet 56. Therefore, the working efficiency is higher, and the dehumidification efficiency is better. Of course, the dehumidifying fan 32 may not be disposed opposite to the air inlet 56, for example, a certain position is staggered with respect to the air inlet 56.

In the preferred embodiment, the partition 50, the front side panel 58, the left side panel 60, the right side panel 62 and the bottom panel 64 are integrally formed. Further, a rear side plate 66 is detachably provided, and an air intake duct 68 and an air return duct 70 are provided on the rear side plate 66. Thus, the refrigeration fan 46 delivers the refrigeration from the refrigeration evaporator 42 to the drying drawer 24 via the inlet air passage, while the heat in the drying drawer 24 is returned to the refrigeration evaporator 42 via the return air passage 70, thereby creating an external circuit. And the circulation between the dry and humid air between the storage space 54 and the condensing space 52 in the drying drawer 24 is an internal circulation. In the preferred embodiment, due to the arrangement of the double circulation system, certain refrigerating temperature is ensured in the drying drawer 24, a dry refrigerating environment is ensured, and a good dehumidifying effect is achieved.

In this embodiment, the rear side plate 66 is fixed by screws, but may be fixed by other fixing means such as riveting. The condensation metal plate 30 is also of a split structure, and the condensation metal plate 30 can be made of aluminum or other materials. The condensation metal plate 30 is fixed by screws or by gluing.

Referring further to fig. 1 and 8, in the present embodiment, the box body 20 includes a left side wall, a right side wall, a top wall 72, a bottom wall 74 and a rear side wall 76, the rear side wall 76 connects the left side wall, the right side wall, the top wall 72 and the bottom wall 74, the drain pipe 36 includes a first section 78 communicating with the groove 34 and a second section 80 disposed at an angle to the first section 78 and at the rear side wall 76, and the second section 80 is connected to the U-shaped pipe portion 38. Preferably, the angle subtended by the first section 78 and the second section 80 is obtuse.

In the preferred embodiment, the first section 78, the second section 80 and the U-shaped tube portion 38 are of one-piece construction. Of course, the first and

second sections

78, 80 and the U-shaped tube portion 38 may be manufactured separately and then bonded or welded to each other. Similarly, the first section 78 and the second section 80 may be integrally formed, with the second section 80 being bonded or welded to the U-shaped tube portion 38.

The preferred embodiment also discloses a control system of the refrigerator, which comprises a main control board, wherein the main control board respectively controls the opening or closing of the air door and the dehumidification fan 32, and is electrically connected with the heating wires to control the heating of the heating wires or stop heating.

As shown in fig. 9, the preferred embodiment further discloses a control method of a control system of a refrigerator, which includes a dehumidification method after opening the drying drawer 24, that is, a dehumidification of the drying drawer immediately after the drying drawer is opened and then closed. The dehumidification method after the drying drawer 24 is opened comprises the following steps:

s1, judging whether dehumidification is in progress;

s2, if the judgment result in the step S1 is yes, judging whether the accumulated dehumidification time reaches the preset time, if so, closing the dehumidification fan 32 (refer to fig. 3) to stop the air flow in the drying drawer 24, closing the air door, and if not, ending the program and continuing the dehumidification;

s3, when the judgment result in the step S1 is negative, the cumulative time for closing the drying drawer 24 is calculated;

s5, if the judgment result in the step S4 is yes, judging whether the temperature of the evaporator is less than 0 ℃, if the judgment result is yes, turning on the dehumidifying fan 32 to forcibly dry the air flow in the drawer, and turning on the damper to lower the temperature of the condensation metal plate 30 (see fig. 3); if the judgment result that the temperature of the evaporator is less than 0 ℃ is negative, ending the program and stopping dehumidification;

The step S5 of determining the temperature of the evaporator is to determine the evaporator that cools the condensation metal plate 30 to generate condensation, and specifically, in this embodiment, is to determine the temperature of the refrigeration evaporator.

As shown in fig. 10, in the preferred embodiment, the control method further includes an automatic dehumidification method, that is, a dehumidification method for drying the drawer in a case where the drawer is not opened for a long time. The automatic dehumidification method comprises the following steps:

a. judging whether dehumidification is in progress;

b. if the judgment result in the step a is yes, judging whether the accumulated dehumidification time reaches the preset time, if so, closing the dehumidification fan 32 to stop the air flow in the drying drawer and closing the air door, and if not, ending the program and continuing the dehumidification;

c. when the judgment result in the step a is negative, calculating the accumulated time of the unopened drying drawer;

d, judging whether the accumulated time in the step c is greater than a threshold value T2;

e. if the judgment result in the step d is yes, judging whether the temperature of the evaporator is less than 0 ℃, if the judgment result that the temperature of the evaporator is less than 0 ℃ is yes, opening the dehumidifying fan 32 to forcibly dry the air flow in the drawer, and opening the air door to reduce the temperature of the condensation metal plate 30; if the judgment result that the temperature of the evaporator is less than 0 ℃ is negative, ending the program and stopping dehumidification;

f. and d, if the judgment result in the step d is negative, ending the program and stopping dehumidification.

In addition, as shown in fig. 11, the control method further includes a drainage control method including the steps of:

judging whether a heating wire is heating a U-shaped pipe or not;

if the judgment result in the step I is yes, further judging whether the accumulated heating time reaches the set time, if so, stopping heating the heating wire, and if not, ending the program and continuing heating;

if the judgment result in the step I is negative, calculating the accumulated time of non-drainage between drainage and the last drainage, if the accumulated time of non-drainage is greater than the judgment result of a threshold T3, opening a heating wire to start heating when defrosting starts, and if defrosting does not start, ending the program and not draining;

if the judgment result that the accumulated time of the water not drained is larger than the threshold T3 is negative, the program is ended and the water is not drained.

Further, the control system further comprises a humidity sensor (not shown), the humidity sensor is arranged in the drying drawer and used for monitoring the humidity in the drying drawer, and the main control board of the control system is electrically connected with the humidity sensor to acquire the humidity value monitored by the humidity sensor and process the humidity value.

As shown in fig. 12 to 16, the present invention provides a second preferred embodiment, in which the refrigerator further includes a humidifying area 84 provided in the refrigerating chamber 81, and the drying drawer 82 is independent of the humidifying area 84, that is, the drying drawer 82 is provided separately from the humidifying area 84. The dehumidifying structure and the dehumidifying method of the dry drawer 82 are the same as those of the first embodiment, and will not be described in detail. The difference from the first embodiment is that the refrigerator further includes a humidifier 85 which can controllably humidify the humidifying area 84, and the dew generated on the dew condensation metal plate 86 inside the drying drawer 82 supplies water to the humidifier 85.

In the preferred embodiment, the condensation metal plate 86 for condensation is arranged in the drying drawer 82, so that when the dehumidifying fan 88 blows the moisture in the drying drawer 82 to the condensation metal plate 86, the condensation metal plate 86 can receive the cold air blown from the air outlet 89, and the moisture can generate condensation on the condensation metal plate 86, so that the drawer in the refrigerating chamber 81 achieves a better dehumidifying effect. Furthermore, the generated condensed water is used for adding water to the humidifier 85, and water is not required to be added by a user to realize humidification of the humidification region 84, so that the convenience of the user is greatly improved, and the user experience is better.

Further, the refrigerator further includes a humidifier water box 90 for supplying water to the humidifier 85, a defrosting water receiving container 94 for receiving defrosting water is provided below the evaporator 91, and the defrosting water receiving container 94 is communicated with the humidifier water box 90 through a defrosting water pipe 96. The evaporator 91 is a refrigeration evaporator. Thus, the amount of water in the humidifier water box 90 is ensured, and the amount of water required by the humidifier 85 cannot be met by the condensed water generated by the drying drawer 82.

The pipe diameter of the defrosting water pipe 96 gradually increases from the adjacent defrosting water receiving container 94 to the adjacent humidifier water cartridge 90. Thereby effectively preventing the defrosting water from hanging on the wall and freezing in the defrosting water pipe 96.

Specifically, the humidifier water box 90 is communicated with the humidifier 85 through a water inlet pipe 93, and the humidifier water box 90 is communicated with a condensed water receiving container 100 through a condensed water pipe 98. Similarly to the first embodiment, the refrigerator also includes a drain pipe 102 and a water pan, and the drain pipe 102 includes a U-shaped pipe portion 104 and heating wires provided on the periphery of the U-shaped pipe portion 104. The U-shaped tube portion 104 is also disposed adjacent the freeze evaporator 92. Different from the first embodiment, one end of the drain pipe 102 is communicated with the humidifier water box 90, and the other end of the drain pipe 102 is arranged on the water pan. Excess water in the humidifier tub 90 is drained through a drain tube 102 into a drip tray. In the preferred embodiment, the specific arrangement of the upper portion of the drain pipe 102 communicating with the U-shaped pipe portion 104 is different from that of the first embodiment, but may be the same as that of the first embodiment. In this embodiment, the drain tube 102 includes a first section 106 in communication with the humidifier tub 90 and a second section 108 disposed at an angle to the first section 106 and on the rear side wall, and the second section 108 is also connected to the U-shaped tube portion 104. The first section 106 and the second section 108 are at an angle slightly greater than 90 degrees.

In the vertical direction, the connection point between the drain pipe 102 and the humidifier water box 90 is higher than the connection point between the condensate pipe 98 and the humidifier water box 90, and a one-way permeable membrane is disposed at the position of the condensate pipe 98 near the pipe opening of the humidifier water box 90, so as to ensure that water can only flow from the condensate water receiving container 100 to the humidifier water box 90, and prevent the water vapor in the humidifier water box 90 from entering the condensate water receiving container 100 from the humidifier water box 90. The vertical direction here is referred to when the refrigerator is in a use state. In addition, a communication point of the condensate pipe 98 with the humidifier water tub 90 is lower than a communication point of the condensate pipe 98 with the condensate receiving container 100 in the vertical direction.

The main control board calculates the maximum dew point humidity according to the temperature in the humidification area 84, and controls the humidifier 85 to work until the humidity in the humidification area 84 is adjacent to and less than the maximum dew point humidity. Thereby ensuring that the humidified region 84 reaches a certain desired humidity without causing condensation. Further, a temperature sensor (not shown) for detecting the temperature in the humidification region 84 and a humidity sensor (not shown) for detecting the humidity in the humidification region 84 are provided in the humidification region 84. And the temperature sensor and the humidity sensor are both electrically connected with the main control board.

In addition, when the refrigerator is used for refrigerating, the humidifier 85 does not work, so that water vapor is prevented from entering the surface of the refrigeration evaporator 91 to be frosted and frozen, the load of the system is prevented from being increased, and the defrosting period is shortened.

In the preferred embodiment, the humidifying area 84 is provided as a humidifying drawer 84 sealed with respect to the refrigerating compartment 81, and a humidifying fan 110 for making the humidity in the humidifying drawer 84 uniform is provided in the humidifying drawer 84. Humidification drawer 84 and drying drawer 82 are all sealed, and separate each other the setting. In addition, the humidifying area 84 may be provided in other forms, such as opening in the refrigerating chamber 81, as will be described in detail in the following embodiments.

Furthermore, the humidifier 85 is electrically connected to the main control board, and the main control board controls the on/off of the humidifier 85 to humidify/stop the humidification of the humidification region 84.

As shown in fig. 17 to 19, the present invention provides a third preferred embodiment, which is different from the second embodiment in the arrangement of the humidification region, and is otherwise the same as the second embodiment, and the details of the different parts will be described below.

In this embodiment, the dry drawer 112 is still a separate sealed area within the refrigerated compartment. The humidifying area 116 is not a sealed area provided separately from the refrigerating chamber, but is provided to be opened to the refrigerating chamber. That is, the other regions of the refrigerator compartment, except for the independent region where the drying drawer 112 is separately sealed, are the humidifying regions 116. The dehumidifying structure and dehumidifying method of the drying drawer 112 are the same as those of the first embodiment, and the humidifying structure and manner of the humidifying region 116 are the same as those of the second embodiment, and thus will not be described in detail. Specifically, the humidifier 118 is disposed between the drying drawer 112 and the sidewall of the cabinet, and the humidifier 118 may be disposed on the left side, the right side, or the rear side of the drying drawer 112. Preferably, the humidifier 118 is disposed on the left or right side of the drying drawer 112, and the humidifier 118 is disposed adjacent to the rear side wall of the cabinet.

As shown in fig. 20 to 21, the fourth preferred embodiment of the present invention is different from the second embodiment in that a sealed drawer 122 is disposed in the refrigerating compartment 120, and the humidity of the drawer 122 is controllable, that is, the drawer 122 can be dehumidified as required to achieve a certain dry environment requirement, or can be humidified as required to achieve a certain humidity environment requirement. Therefore, the refrigerator drawer 122 has stronger applicability and meets the requirements of various different articles on storage environments.

The dehumidifying structure and the dehumidifying method are the same as those of the drying drawer in the second embodiment, and the humidifying structure and the manner are the same as those of the humidifying region in the second embodiment. The drawer 122 is dehumidified by arranging the condensation metal plate 124 in the sealed drawer 122, blowing the moisture in the drawer 122 to the condensation metal plate 124 by the dehumidification fan 126, and forming condensation through the condensation metal plate 124 to dehumidify the drawer 122. The drawer 122 is also humidified by a humidifier 128, and the condensed water generated on the condensed metal plate 124 supplies water to the humidifier 128. Also, the defrosting water of the evaporator 130 may supply water to the humidifier 128. The specific dehumidification and humidification will therefore not be described in detail here.

In the present embodiment, the humidifier 128 is provided at the rear portion of the drawer 122, and preferably, the humidifier 128 is provided in the condensation space of the drawer 122.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A refrigerator comprises a refrigerating chamber, a drying drawer and a humidifying area, wherein the drying drawer and the humidifying area are arranged in the refrigerating chamber, and the drying drawer is independent of the humidifying area;

the U-shaped pipe part is arranged adjacent to an evaporator of the refrigerator and is used for enabling condensed water to be frozen into a solid state by the evaporator when passing through the U-shaped pipe part, and external water vapor is prevented from entering the water drainage pipe;

the heating wire may be adapted to be operated simultaneously when the evaporator is defrosted for melting ice in the U-shaped tube portion.

2. The refrigerator according to claim 1, further comprising an evaporator, an air duct, an air outlet provided between the air duct and the refrigerating chamber, a damper capable of selectively opening or closing the air outlet, and a humidifier water box for supplying water to the humidifier, wherein a defrosting water receiving container for receiving defrosting water is provided below the evaporator, and the defrosting water receiving container is communicated with the humidifier water box through a defrosting water pipe.

3. The refrigerator as claimed in claim 2, wherein a pipe diameter of the defrosting water pipe is gradually increased from adjacent to the defrosting water receiving container to adjacent to the humidifier water box.

4. The refrigerator of claim 2, further comprising a condensed water receiving container for collecting condensed water generated on the condensed metal plate, wherein the humidifier water box is communicated with the humidifier through a water inlet pipe, and the humidifier water box is communicated with the condensed water receiving container through a condensed water pipe.

5. The refrigerator according to claim 4, further comprising a drain pipe and a water pan, wherein one end of the drain pipe is communicated with the humidifier water box, the other end of the drain pipe is disposed on the water pan, the refrigerator further comprises a main control board, the main control board respectively controls the opening or closing of the air door and the dehumidification fan, and the main control board is electrically connected with the heating wire to control the heating wire to be heated or stop heating.

6. The refrigerator as claimed in claim 5, wherein the drain pipe is connected to the humidifier water tub at a higher point in a vertical direction than the condensate pipe is connected to the humidifier water tub, and a water permeable one-way membrane is provided at the end of the condensate pipe adjacent to the humidifier water tub to ensure that water can only flow from the condensate receiving container to the humidifier water tub and to prevent moisture in the humidifier water tub from entering the condensate receiving container.

7. The refrigerator as claimed in claim 5, wherein the main control board calculates a dew point maximum humidity according to the temperature in the humidification region, and the main control board controls the humidifier to operate until the humidity in the humidification region is adjacent to and less than the dew point maximum humidity.

8. The refrigerator according to claim 5, further comprising a freezing chamber, wherein the evaporator includes a refrigerating evaporator for supplying cooling energy to the refrigerating chamber and a freezing evaporator for supplying cooling energy to the freezing chamber, and the refrigerating evaporator delivers cold air to the condensation metal plate through the air outlet.

9. The refrigerator of claim 1, wherein the humidification region is provided as a humidification drawer sealed with respect to the refrigerating compartment, and a humidification fan is provided in the humidification drawer to make humidity in the humidification drawer uniform.

10. The refrigerator of claim 1, wherein the humidification region is provided to be open to the refrigerating chamber.

11. The refrigerator according to claim 1, wherein the drying drawer further comprises a partition plate, the partition plate partitions the drying drawer into a condensation space and a storage space for placing articles, the partition plate is provided with an air inlet penetrating through the condensation space and the storage space, the dehumidifying fan is disposed in the condensation space, the condensation metal plate is exposed out of the condensation space, and the dehumidifying fan sucks air in the storage space through the air inlet to the condensation space and flows to the condensation metal plate.

12. A control system of a refrigerator comprises a refrigerating chamber, a drying drawer and a humidifying area, wherein the drying drawer and the humidifying area are arranged in the refrigerating chamber, the drying drawer is independent of the humidifying area, the control system is characterized in that a condensation metal plate is arranged in the drying drawer, a dehumidifying fan which enables air in the drying drawer to flow to the condensation metal plate is arranged in the drying drawer, the refrigerator further comprises a humidifier, condensation generated on the condensation metal plate supplies water to the humidifier, the control system comprises a main control board which controls the dehumidifying fan to be turned on or off, the main control board controls the humidifier to be turned on or off so as to humidify/stop humidifying the humidifying area, the refrigerator further comprises a drain pipe communicated with the drying drawer, and the drain pipe comprises a U-shaped pipe part and heating wires arranged on the periphery of the U-shaped pipe part, the U-shaped pipe part is arranged adjacent to an evaporator of the refrigerator and is used for enabling condensed water to be frozen into a solid state by the evaporator when passing through the U-shaped pipe part, and external water vapor is prevented from entering the water drainage pipe;

13. The control method of a control system of a refrigerator according to claim 12, the refrigerator further comprising an evaporator, an air duct, an air outlet provided between the air duct and the refrigerating compartment, and a damper for selectively opening or closing the air outlet, the control method comprising a dehumidifying method after opening a drying drawer, the dehumidifying method after opening the drying drawer comprising the steps of:

s1, judging whether dehumidification is in progress;

s3, when the judgment result in the step S1 is negative, the cumulative time for closing the drying drawer is calculated;