CN109442841B

CN109442841B - Control system and control method of refrigerator

Info

Publication number: CN109442841B
Application number: CN201810432150.8A
Authority: CN
Inventors: 娄喜才; 李春阳; 牟森; 朱小兵
Original assignee: Haier Smart Home Co Ltd
Current assignee: 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: CN107314612A; CN108826793B; CN108826793A; CN108759242B; CN108759242A; CN109442841A

Abstract

The invention discloses a control system and a control method of a refrigerator, a condensation metal plate is arranged in a drawer of the refrigerator, and a dehumidifying fan which enables air in the drawer to flow to the condensation metal plate is arranged in the drawer, a groove for collecting condensation generated on the condensation metal plate is arranged on the drawer, the refrigerator also 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, the U-shaped pipe part is arranged adjacent to the evaporator, one end of the drain pipe is communicated with the groove, the other end of the drain pipe is arranged on the water pan, the control system comprises a main control panel which 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 of the heating wires or stop heating. The control system and the control method of the refrigerator enable the dehumidification effect of the drawer in the refrigerating chamber to be better.

Description

Control system and control method of refrigerator

Technical Field

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

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 control system and a control method of a refrigerator, which enable the dehumidification effect of a drawer in a refrigerating chamber to be better.

In order to achieve one of the above objects, an embodiment of the present invention provides a control system for a refrigerator, the refrigerator includes a refrigerating chamber, a drawer disposed in the refrigerating chamber, an evaporator, an air duct, an air outlet disposed between the air duct and the refrigerating chamber, and an air door capable of selectively opening or closing the air outlet, wherein a condensation metal plate is disposed in the drawer, a dehumidifying fan for making air flow in the drawer toward the condensation metal plate is disposed in the drawer, a groove for collecting condensation generated on the condensation metal plate is disposed on the drawer, the refrigerator further includes a drain pipe and a water pan, the drain pipe includes a U-shaped pipe portion and a heater disposed at the periphery of the U-shaped pipe portion, the U-shaped pipe portion is disposed adjacent to the evaporator, one end of the drain pipe is communicated with the groove, and the other end of the drain pipe is disposed at the water pan, the control system 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 or stopping of the heating wires.

As a further improvement of the embodiment of the present invention, the drawer further includes a partition plate, the partition plate partitions the 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 plate, 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.

As a further improvement of the embodiment of the present invention, the drawer includes a front side plate, a left side plate, a right side plate, a bottom plate, and a rear side plate, the partition plate, a part of the left side plate, and a part of the right side plate constitute the condensation space, the condensation metal plate is disposed between the partition plate and the rear side plate, and the dehumidification fan is disposed on the condensation metal plate.

As a further improvement of the embodiment of the present invention, the dehumidifying fan is disposed opposite to the air inlet.

As a further improvement of the embodiment of the invention, the partition plate, the front side plate, the left side plate, the right side plate and the bottom plate are of an integrally formed structure, the rear side plate is detachably arranged, and the rear side plate is provided with an air inlet channel and an air return channel.

As a further improvement of the embodiment of the present invention, a projection of the partition plate on the horizontal plane is located within a projection range of the groove on the horizontal plane, the groove has a bottom, a gap is provided between the partition plate and the bottom, and the air dried by the condensation metal plate enters the storage space through the gap.

As a further improvement of the embodiment of the present invention, the box body includes a left side wall, a right side wall and a rear side wall connecting the left side wall and the right side wall, the drain pipe includes a first section communicated with the groove and a second section disposed at an angle to the first section and disposed on the rear side wall, and the second section is connected to the U-shaped pipe portion.

As a further improvement of the embodiment of the present invention, the refrigerator further includes a freezing chamber, the evaporators respectively supply cooling energy to the freezing chamber and the refrigerating chamber, and the evaporators deliver the cooling air to the condensation metal plate through the air outlet, and the U-shaped pipe portion is disposed adjacent to the evaporator.

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.

In order to achieve one of the above objects, an embodiment of the present invention further provides a method for controlling a refrigerator, the refrigerator includes a refrigerating chamber, a drawer disposed in the refrigerating chamber, an evaporator, an air duct, an air outlet disposed between the air duct and the refrigerating chamber, and an air door capable of selectively opening or closing the air outlet, wherein a condensation metal plate is disposed in the drawer, a dehumidifying fan for making air in the drawer flow toward the condensation metal plate is disposed in the drawer, a groove for collecting condensation generated on the condensation metal plate is disposed on the drawer, the refrigerator further includes a drain pipe and a water receiving tray, the drain pipe includes a U-shaped pipe portion and a heating wire disposed on the periphery of the U-shaped pipe portion, the U-shaped pipe portion is disposed adjacent to the evaporator, one end of the drain pipe is communicated with the groove, and the other end of the drain pipe is disposed on the water receiving tray, the control method comprises a dehumidification method after the drawer is opened, and the dehumidification method after the drawer 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 to stop the air flow in the drawer, and closing the air door, 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 force 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.

As a further improvement of the embodiment of the present invention, the control method further includes an automatic dehumidification method, the automatic dehumidification method including the steps of:

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 to stop the air flow in the drawer, closing the air door, and if not, continuing to dehumidify;

c. when the judgment result in the step a is negative, calculating the accumulated time when the drawer is not opened;

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 a dehumidification fan to force 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;

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

As a further improvement of the embodiment of the present invention, 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.

Compared with the prior art, the invention has the beneficial effects that: according to the technical scheme provided by the invention, the drawer is internally provided with the condensation metal plate, and when the condensation metal plate receives cold air blown from the air outlet, the temperature of the condensation metal plate in the drawer is the lowest. Like this, when the dehumidification fan blows the moisture in the drawer to the condensation metal sheet, can produce the condensation at the condensation metal sheet, and the condensation water that produces flows to the water collector through the drain pipe, control system's main control board controls respectively opening or closing of air door and dehumidification fan, just the main control board with the heater strip electricity is connected in order to control the heating or the stop heating of heater strip. The invention blows cold air to the condensation metal plate through the evaporator to cause the condensation metal plate to generate condensation, thereby leading the drawer in the refrigerating chamber to achieve better dehumidification effect.

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 flow chart illustrating a dehumidifying method after opening a drawer of a refrigerator according to a second embodiment of the present invention;

fig. 13 is a flowchart illustrating an automatic dehumidifying method of a refrigerator according to a second embodiment of the present invention;

fig. 14 is a flowchart illustrating a drain control method of a refrigerator in accordance with a third embodiment of the present invention;

fig. 15 is a flowchart illustrating a drain control method of a refrigerator according to a fourth embodiment of the present invention;

fig. 16 is a flowchart illustrating an automatic dehumidifying method of a refrigerator according to a fifth embodiment of the present invention.

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.

Moreover, it will be understood that, although the terms first, second, etc. may be used herein to describe various elements or structures, these described elements should not be limited by the above terms. The above terms are only used to distinguish these descriptive objects from each other. For example, the first water level sensor may be referred to as a second water level sensor, and likewise, the second water level sensor may also be referred to as a first water level sensor, without departing from the scope of protection of this application.

As shown in fig. 1, a first embodiment of the present invention discloses a refrigerator, which includes a cabinet 20 constituting a refrigerating chamber 22, a refrigerating chamber door for opening and closing the refrigerating chamber 22, a 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 drawer 24, a dehumidifying fan 32 is disposed in the drawer 24 to make air in the drawer 24 flow toward the condensation metal plate 30, one side of the condensation metal plate 30 is exposed in the drawer 24, the other side of the condensation metal plate 30 can receive cold air blown from the air outlet 28, and a groove 34 for collecting condensation generated on the condensation metal plate 30 is disposed on the drawer 24. In addition, the refrigerator further includes a drain pipe 36 and a water pan (not shown), the drain pipe 36 includes a U-shaped pipe portion 38 and heating wires (not shown) provided on 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 communicates with the groove 34, and the other end of the drain pipe 36 is provided on the water pan.

In this embodiment, since the condensation metal plate 30 is provided in the drawer 24, when the condensation metal plate 30 receives the cool air blown from the air outlet 28, the temperature of the condensation metal plate 30 is the lowest in the drawer 24. 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 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 conveys cold air to the condensation metal plate 30 through the air outlet 28, so as to cool the condensation metal plate 30, and the temperature of the condensation metal plate 30 is lowest in the drawer 24, so that when the dehumidifying fan 32 in the drawer 24 starts to work, moisture in the drawer 24 is forced to flow through the metal plate, the moisture is condensed on the condensation metal plate 30, and 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, when passing through the U-shaped tube, the condensed water is frozen in the U-shaped tube by the evaporator, thereby keeping the condensed water in a solid state and blocking the drain pipe 36, preventing communication between the inside and the outside, and 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 drawer 24 further includes a partition 50, the partition 50 divides the 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 from 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 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, wherein the 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 drawer 24 via the intake air, while the heat in the drawer 24 is returned to the refrigeration evaporator 42 via the return air duct 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 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 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 also discloses a control method of a refrigerator, which includes a dehumidifying method after opening the drawer 24, that is, dehumidifying the drawer immediately after the drawer is opened and closed again. The dehumidification method after opening the drawer 24 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 drawer 24, and closing the air door, if not, ending the program and continuing the dehumidification;

s5, if the determination result in the step S4 is yes, determining whether the temperature of the evaporator is less than 0 ℃, if the determination result is yes, turning on the dehumidifying fan 32 to force the air in the drawer to flow, 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 of 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 drawer, and closing the air door, and if not, ending the program and continuing the dehumidification;

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 force the air in the drawer to flow, 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;

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;

In a second preferred embodiment of the present invention, compared with the first preferred embodiment, the control system further includes a humidity sensor (not shown) disposed in the drawer for monitoring humidity in the drawer, and a main control board of the control system is electrically connected to the humidity sensor to obtain a humidity value monitored by the humidity sensor and process the humidity value, and also the main control board controls the opening or closing of the damper and the dehumidifying fan respectively, and is electrically connected to the heating wire to control the heating of the heating wire or stop heating. The other structures are the same as those of the first embodiment, and thus, are not described in detail.

As shown in fig. 12, the preferred embodiment further discloses a method for controlling a refrigerator, and similarly, the method for controlling a refrigerator includes a method for dehumidifying after opening a drawer, and compared with the first preferred embodiment, the method for dehumidifying after opening a drawer adds a step of judging humidity in the drawer. Specifically, the dehumidification method after opening the drawer comprises the following steps:

s1, judging whether dehumidification is in progress;

s3, when the judgment result in the step S1 is negative, judging whether the humidity is larger than a set threshold H1, if the judgment result that the humidity monitored by the humidity sensor is larger than the set threshold H1 is positive, calculating the drawer closing accumulated time and comparing the accumulated time with the set threshold T4, and if the judgment result that the humidity monitored by the humidity sensor is larger than the threshold H1 is negative, ending the program and stopping dehumidification;

s4, if the accumulated time is greater than the threshold value T4 in the step S3, judging whether the temperature of the evaporator is less than 0 ℃, if so, turning on a dehumidification fan to force air in the drawer to flow, and turning on 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;

s5, if the judgment result in the step S3 that the accumulated time is larger than the threshold T4 is no, the process ends and the dehumidification is stopped.

As shown in fig. 13, the control method further includes an automatic dehumidification method including the steps of:

a. judging whether dehumidification is in progress;

b. if the judgment result in the step a is yes, continuously judging whether the humidity is smaller than a set threshold value H2, if the judgment result that the humidity is smaller than the set threshold value H2 is yes, closing the dehumidifying fan to stop the air flow in the drawer, and closing the air door, and if the judgment result that the humidity is smaller than the set threshold value H2 is no, ending the program and continuously dehumidifying;

c. if the judgment result in the step a is negative, reading and processing the reading of the humidity sensor, then judging whether the humidity is greater than a set threshold H1, and if the judgment result that the humidity is greater than the set threshold H1 is positive, judging whether the temperature of the evaporator is less than 0 ℃;

d. if the temperature of the evaporator is lower than 0 ℃, opening a dehumidification fan to force 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;

e. if the humidity is greater than the set threshold H1 in step c, the process ends and the dehumidification is stopped.

In this preferred embodiment, set up humidity transducer for humidity in can mastering the drawer accurately, and control according to humidity, thereby make the dehumidification control to the drawer more accurate, dehumidification effect is more excellent.

In the preferred embodiment, the control method also includes a drain control method, which is the same as the drain control method in the first embodiment and will not be described in detail here.

In a third preferred embodiment of the present invention, compared to the first preferred embodiment, the control system further includes a first water level sensor (not shown) for monitoring the water level in the drain pipe, wherein the main control board is electrically connected to the first water level sensor to obtain the water level value monitored by the first water level sensor and process the water level value, the main control board also controls the opening or closing of the damper and the dehumidifying fan, respectively, and the main control board is electrically connected to the heating wires to control the heating of the heating wires or stop the heating. The other structures are the same as those of the first embodiment, and thus, are not described in detail.

The preferred embodiment also discloses a control method of the refrigerator, and similarly, the control method of the refrigerator comprises a dehumidification method after the drawer is opened. Specifically, as shown in fig. 9, the method for dehumidifying after opening the drawer is the same as the first embodiment, and 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 drawer, closing the air door, and if not, continuing the dehumidification;

Further, control system still is including locating the humidity transducer that is used for monitoring humidity in the drawer, and main control board and humidity transducer electric connection are in order to acquire the humidity value that humidity transducer monitored and handle.

In addition, when a humidity sensor is provided, as shown in fig. 12, the dehumidification method after opening the drawer is the same as the second embodiment, and specifically, in step S3, when the determination result in step S1 is no, it is determined whether the humidity detected by the humidity sensor is greater than the set threshold H1, if the determination result that the humidity detected by the humidity sensor is greater than the set threshold H1 is yes, the drawer closing cumulative time is calculated, and if the determination result that the humidity detected by the humidity sensor is greater than the threshold H1 is no, the routine is ended and the dehumidification is stopped.

The control method in the preferred embodiment also includes an automatic dehumidification method, which is the same as the second embodiment and will not be described in detail here.

In addition, as shown in fig. 14, the control method in the present preferred embodiment 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 negative, reading the water level value monitored by the first water level sensor;

judging whether the water level value monitored by the first water level sensor reaches a water level setting threshold value W1, if the water level value reaches the water level setting threshold value W1, opening the heating wire to heat the U-shaped pipe, and if the water level value does not reach the water level setting threshold value W1, ending the program and not draining water.

In this preferred embodiment, set up level sensor, can judge whether to carry out the drainage according to the water level that detects for can in time drain the condensation water, guaranteed the dehumidification of drawer.

In a fourth preferred embodiment of the present invention, compared with the third preferred embodiment, the control system includes two water level sensors, specifically, the control system includes a first water level sensor for monitoring a high water level in the drain pipe and a second water level sensor for monitoring a low water level in the drain pipe, and the main control board is electrically connected to both the first water level sensor and the second water level sensor to obtain and process a high water level value monitored by the first water level sensor and obtain and process a low water level value monitored by the second water level sensor. Similarly, 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 of the heating wires or stop heating.

In the preferred embodiment, two water level sensors are provided, so that the drainage control is more accurate.

Further, the same as the third embodiment, the control system in this embodiment further includes a humidity sensor disposed in the drawer for monitoring humidity in the drawer, and the main control board is electrically connected to the humidity sensor to obtain a humidity value monitored by the humidity sensor and process the humidity value. The other structures are the same as those of the first embodiment, and will not be described in detail.

Also, the control method of the preferred embodiment includes a dehumidifying method after opening the drawer and an automatic dehumidifying method, and is the same as the third embodiment, and thus will not be described in detail.

In addition, as shown in fig. 15, 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 first step is negative, respectively reading the water level values monitored by the first water level sensor and the second water level sensor;

judging whether the water level value of the first water level sensor reaches a high water level setting threshold value W2, if the water level value of the first water level sensor reaches a high water level setting threshold value W2, opening the heating wire to heat the U-shaped pipe, and if the water level value of the second water level sensor does not reach a high water level setting threshold value W2, judging whether the water level value of the second water level sensor reaches a low water level setting threshold value W1;

judging whether defrosting is started or not if the water level value of the second water level sensor reaches a low water level setting threshold value W1 in the step IV, if defrosting is started, opening a heating wire to heat the U-shaped pipe, and if defrosting is not started, ending the program and not draining water;

sixthly, if the water level value of the second water level sensor does not reach the low water level setting threshold value W1 in the step IV, ending the program and not draining water.

Compared with the fourth preferred embodiment, in the preferred embodiment, the control system further includes a humidity sensor disposed in the drawer for monitoring humidity in the drawer, and the main control board is electrically connected to the humidity sensor to obtain and process a humidity value monitored by the humidity sensor.

In the preferred embodiment, the control method includes a dehumidifying method after opening the drawer and an automatic dehumidifying method, and the dehumidifying method after opening the drawer is the same as the third and fourth embodiments, and will not be described in detail. As shown in fig. 16, the automatic dehumidification method includes the following steps:

a. judging whether dehumidification is in progress;

c. if the judgment result in the step a is negative, reading and processing the reading of the humidity sensor, and then judging whether the humidity is greater than a set threshold H1;

d. if the humidity is larger than the set threshold H1, judging whether the current time period is the user use time period, if so, ending the program and stopping dehumidification, and if not, continuously judging whether the temperature of the evaporator is smaller than 0 ℃;

e. if the judgment result that the humidity is larger than the set threshold H1 is negative, the program is ended and the dehumidification is stopped;

f. if the judgment result that the temperature of the evaporator is lower than 0 ℃ is yes, opening a dehumidification fan to force 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, the program is ended, and the dehumidification is stopped.

The control system further includes a first water level sensor (not shown) for monitoring a high water level in the drain pipe and a second water level sensor (not shown) for monitoring a low water level in the drain pipe, and the main control board is electrically connected to both the first water level sensor and the second water level sensor to obtain and process a high water level value monitored by the first water level sensor and obtain and process a low water level value monitored by the second water level sensor.

The control method of the refrigerator further includes a drain control method, which is the same as the fourth embodiment and will not be described in detail herein.

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 control system of a refrigerator comprises a refrigerating chamber, a drawer arranged in the refrigerating chamber, an evaporator, an air channel, an air outlet arranged between the air channel and the refrigerating chamber, and an air door capable of selectively opening or closing the air outlet, and is characterized in that a condensation metal plate is arranged in the drawer, a dehumidifying fan which enables air in the drawer to flow to the condensation metal plate is arranged in the drawer, a groove used for collecting condensation generated on the condensation metal plate is arranged on the drawer, the refrigerator also comprises a drain pipe and a water receiving disc, the drain pipe comprises a U-shaped pipe part and a heating wire arranged on the periphery of the U-shaped pipe part, the U-shaped pipe part is arranged close to the evaporator and used for enabling the condensation water to be frozen into a solid state by the evaporator when passing through the U-shaped pipe part and preventing external water vapor from entering the drain pipe, and one end of the drain pipe is communicated with the groove, the other end of drain pipe is located the water collector, control system includes the main control board, the main control board controls respectively opening or closing of air door and dehumidification fan, just the main control board with the heater strip electricity is connected in order to control the heating or the stop heating of heater strip, the heater strip can be used to work simultaneously when the evaporimeter changes frost, is used for melting ice in the U-shaped pipe portion.

2. The control system of claim 1, wherein the drawer further comprises a partition plate, the partition plate partitions the 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 into the condensation space through the air inlet and flows to the condensation metal plate.

3. The control system of a refrigerator according to claim 2, wherein the drawer includes a front side plate, a left side plate, a right side plate, a bottom plate, and a rear side plate, the rear side plate, a partition plate, a portion of the left side plate and a portion of the right side plate constitute the condensation space, the condensation metal plate is disposed between the partition plate and the rear side plate, and the dehumidifying fan is disposed on the condensation metal plate.

4. The control system of claim 3, wherein the dehumidifying fan is disposed opposite to the air inlet.

5. The control system of the refrigerator as claimed in claim 3, wherein the partition plate, the front plate, the left plate, the right plate and the bottom plate are integrally formed, the rear plate is detachably disposed, and the rear plate is provided with an air inlet passage and an air return passage.

6. The control system of a refrigerator according to claim 2, wherein a projection of the partition plate on a horizontal plane is located within a projection of the recess on a horizontal plane, the recess has a bottom, and a gap is provided between the partition plate and the bottom, through which air dried by the condensed metal plate enters the storage space.

7. The control system of claim 1, wherein the refrigerator comprises a cabinet body, the cabinet body comprises a left side wall, a right side wall and a rear side wall connecting the left side wall and the right side wall, the drain pipe comprises a first section communicated with the groove and a second section arranged at an angle with the first section and arranged on the rear side wall, and the second section is connected with the U-shaped pipe portion.

8. The control system for a refrigerator according to claim 1, wherein the refrigerator further comprises a freezing chamber, the evaporators supply cooling energy to the freezing chamber and the refrigerating chamber, respectively, and the evaporators supply cooling air to the condensation metal plate through the air outlet, and the U-shaped pipe portion is disposed adjacent to the evaporators.

9. The control system for a refrigerator according to claim 1, wherein the refrigerator further comprises a freezing chamber, and the evaporator comprises a refrigerating evaporator for supplying cooling to the refrigerating chamber and a freezing evaporator for supplying cooling to the freezing chamber, the refrigerating evaporator supplies cold air to the condensation metal plate through the air outlet, and the U-shaped pipe portion is disposed adjacent to the freezing evaporator.

10. A control method of a refrigerator comprises a refrigerating chamber, a drawer arranged in the refrigerating chamber, an evaporator, an air duct, an air outlet arranged between the air duct and the refrigerating chamber, and an air door capable of selectively opening or closing the air outlet, and is characterized in that a condensation metal plate is arranged in the drawer, a dehumidifying fan capable of enabling air in the drawer to flow to the condensation metal plate is arranged in the drawer, a groove used for collecting condensation generated on the condensation metal plate is formed in the drawer, the refrigerator further comprises a drain pipe and a water receiving disc, the drain pipe comprises a U-shaped pipe part and heating wires arranged on the periphery of the U-shaped pipe part, the heating wires can be used for simultaneously working when the evaporator is defrosted and are used for melting ice in the U-shaped pipe part, the U-shaped pipe part is arranged adjacent to the evaporator and is used for enabling the condensation water to be frozen into a solid state by the evaporator when passing through the U-shaped pipe part, the control method comprises a dehumidification method after opening the drawer, and the dehumidification method after opening the drawer comprises the following steps:

s1, judging whether dehumidification is in progress;

11. The method as claimed in claim 10, wherein the drawer further includes a partition dividing the drawer into a condensation space and a storage space for placing articles, the partition being provided with an air inlet penetrating the condensation space and the storage space, the dehumidifying fan being disposed in the condensation space and exposed from the condensation space, the dehumidifying fan sucking air in the storage space into the condensation space through the air inlet and flowing to the condensation metal plate.

12. The method of claim 10, wherein the refrigerator includes a cabinet including a left sidewall, a right sidewall, and a rear sidewall connecting the left sidewall and the right sidewall, the drain pipe includes a first section communicating with the groove and a second section disposed at an angle to the first section and at the rear sidewall, and the second section is connected to the U-shaped pipe portion.

13. The method of controlling a refrigerator according to claim 10, wherein the refrigerator further includes a freezing chamber, the evaporators supply cooling air to the freezing chamber and the refrigerating chamber, respectively, and the evaporators supply cooling air to the condensation metal plate through the air outlet, and the U-shaped pipe portion is disposed adjacent to the evaporators.

14. The method of controlling a refrigerator according to claim 10, wherein the refrigerator further includes a freezing chamber, and the evaporator includes a refrigerating evaporator for supplying cooling to the refrigerating chamber and a freezing evaporator for supplying cooling to the freezing chamber, the refrigerating evaporator supplies cold air to the condensation metal plate through the air outlet, and the U-shaped pipe portion is disposed adjacent to the freezing evaporator.

15. The control method of a refrigerator according to claim 10, further comprising an automatic dehumidifying method when the drawer is not opened for a long time, the automatic dehumidifying method comprising the steps of:

a. judging whether dehumidification is in progress;

16. The control method according to claim 15, characterized by further comprising a drain control method including the steps of:

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