CN114674105A - Refrigerator and control method thereof - Google Patents
Refrigerator and control method thereof Download PDFInfo
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- CN114674105A CN114674105A CN202210231565.5A CN202210231565A CN114674105A CN 114674105 A CN114674105 A CN 114674105A CN 202210231565 A CN202210231565 A CN 202210231565A CN 114674105 A CN114674105 A CN 114674105A
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000005057 refrigeration Methods 0.000 claims description 88
- 230000008859 change Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 27
- 239000003507 refrigerant Substances 0.000 description 17
- 238000009833 condensation Methods 0.000 description 11
- 230000005494 condensation Effects 0.000 description 10
- 230000006872 improvement Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000011555 saturated liquid Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/12—Sensors measuring the inside temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a refrigerator and a control method thereof, wherein a spoiler is arranged in a refrigerating air duct of the refrigerator to shield cold air flowing into the air duct, in the refrigerating process of the refrigerator, when the temperature difference between real-time refrigerating temperature and target refrigerating temperature is in the temperature difference range, the temperature of a refrigerating chamber is very close to the target refrigerating temperature at the moment, excessive cold air is not needed, in order to avoid the too low temperature of the refrigerating chamber, the spoiler is controlled to gradually cover an air outlet of the refrigerating air duct to slowly reduce the air quantity at the outlet of the refrigerating air duct and reduce the falling speed of the temperature of the refrigerating chamber, finally, when the air door of the refrigerating air duct is completely closed, a small amount of residual cold air can enable the refrigerating chamber to be stably lowered to the target refrigerating temperature, so that the situation that the instantaneous temperature of the refrigerating chamber is obviously lower than the target temperature due to the fact that the air door of the refrigerating air duct is completely closed due to reaching the target temperature under the condition that no measure of slowly lowering the air quantity exists can be avoided, the temperature of the refrigerating chamber can be smoothly lowered to the target temperature.
Description
Technical Field
The invention relates to the technical field of refrigerator control, in particular to a refrigerator and a control method thereof.
Background
Air-cooled refrigerator receives consumer's favor more and more in the existing market, and the production and sales volume of air-cooled refrigerator accounts for and also is bigger and bigger, and the air-cooled refrigerator uses more conveniently, does not need the manual work to defrost, and along with the refrigerator volume is bigger and bigger, air-cooled refrigerator temperature homogeneity is more advantageous. However, the disadvantages of the air-cooled refrigerator are more obvious, and particularly, the single-system air-cooled refrigerator is that, in principle, the cold air after heat exchange by the evaporator is blown into each compartment through the air duct by the fan, the cold air quantity entering the compartment is controlled by the air door, and for the refrigerator with a plurality of compartments, the temperature is controlled by independently arranging one air door, so that the condition of instantly conveying a large amount of cold air for refrigeration is easy to occur, the problem of too low temperature at the moment of refrigeration is easy to cause, and for the articles with higher temperature storage requirements, the too low temperature may affect the quality of the articles.
Disclosure of Invention
The embodiment of the invention aims to provide a refrigerator and a control method thereof, which can enable the temperature of a refrigerating chamber to be stably reduced to a target temperature, improve the stability of the temperature of the refrigerating chamber, save air volume and reduce power consumption.
To achieve the above object, an embodiment of the present invention provides a refrigerator, including:
The refrigerating air duct is arranged in the refrigerating chamber of the refrigerator and used for providing cold air to the refrigerating chamber;
the turbulence module is arranged in the refrigeration air duct, comprises a turbulence plate and a driving motor, wherein the turbulence plate is used for disturbing the wind flowing to the storage compartment to form turbulence so as to promote the temperature of the compartment to change in a balanced manner;
the air door is arranged at an air inlet of the refrigerating air duct, and the cold air subjected to heat exchange is conveyed into the refrigerating air duct through the air door;
the controller is configured to:
acquiring the real-time refrigerating temperature and the target refrigerating temperature of the refrigerating chamber;
when the real-time refrigeration temperature is greater than the target refrigeration temperature and the refrigeration temperature difference between the real-time refrigeration temperature and the target refrigeration temperature is within a preset temperature difference range, sending a turbulence instruction to the driving motor so that the driving motor moves the position of the spoiler;
and when the real-time refrigerating temperature is detected to be less than or equal to the target refrigerating temperature, closing the air door.
As an improvement of the above scheme, the refrigeration air duct comprises an air duct front plate and an air duct back plate covering the rear side of the air duct front plate, at least two air duct paths are arranged in the refrigeration air duct, and each air duct path corresponds to one air outlet;
The air outlets are arranged on two sides of the refrigerating air duct, the number of the air outlets corresponds to the number of the shelves in the refrigerating chamber, the size of each air outlet is the same, and the center positions of the air inlets of the air duct paths on the same side of the refrigerating air duct are on the same vertical line;
the refrigerator comprises two spoiler modules which are respectively arranged on two sides of the refrigerating air channel, the spoilers are of long strip-shaped structures, one surfaces of the spoilers are in contact with the air channel back plate, and the driving motor is used for moving the positions of the spoilers to shield the air channel path.
As an improvement of the above, before sending the spoiler instruction to the drive motor, the controller is further configured to:
searching a corresponding target speed in a preset speed table according to the refrigeration temperature difference; the speed meter records the corresponding moving speed of the spoilers in different refrigeration temperature difference ranges;
writing the target speed into the disturbed flow instruction, so that the driving motor controls the disturbed flow plate to move from an initial position to a target position according to the target speed after receiving the disturbed flow instruction; the initial position is a position at which the spoiler is located when the spoiler does not block any air channel path on the same side of the refrigerating air channel, and the target position is a position at which the spoiler is located when the spoiler completely blocks any air channel path on the same side of the refrigerating air channel.
As an improvement of the above, the controller is further configured to:
after the air door is closed, if the real-time refrigeration temperature is higher than the target refrigeration temperature and the refrigeration temperature difference is not within the temperature difference range, opening the air door;
and after the air door is opened, sending a recovery instruction to the driving motor so that the driving motor controls the spoiler to recover to the initial position.
In order to achieve the above object, an embodiment of the present invention further provides a refrigerator control method, where the refrigerator includes a refrigerating air duct disposed in a refrigerating chamber of the refrigerator for providing cold air to the refrigerating chamber, the refrigerating air duct is provided with a spoiler module and an air door, the spoiler module includes a spoiler for disturbing air flowing to a storage compartment to form turbulence to promote temperature equilibrium change of the storage compartment, and a driving motor for controlling movement of the spoiler, and the cold air after heat exchange is delivered to the refrigerating air duct through the air door; then, the method comprises:
acquiring the real-time refrigerating temperature and the target refrigerating temperature of the refrigerating chamber;
and when the real-time refrigerating temperature is greater than the target refrigerating temperature and the refrigerating temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is within a preset temperature difference range, sending a turbulence instruction to the driving motor so that the driving motor moves the position of the spoiler.
As an improvement of the above scheme, the refrigeration air duct comprises an air duct front plate and an air duct back plate covering the rear side of the air duct front plate, at least two air duct paths are arranged in the refrigeration air duct, and each air duct path corresponds to one air outlet;
the air outlets are arranged on two sides of the refrigerating air duct, the number of the air outlets corresponds to the number of the shelves in the refrigerating chamber, the size of each air outlet is the same, and the center positions of the air inlets of the air duct paths on the same side of the refrigerating air duct are on the same vertical line;
the refrigerator comprises two spoiler modules which are respectively arranged on two sides of the refrigerating air channel, the spoilers are of long strip-shaped structures, one surfaces of the spoilers are in contact with the air channel back plate, and the driving motor is used for moving the positions of the spoilers to shield the air channel path.
As an improvement of the above scheme, before sending the spoiler command to the driving motor, the method further includes:
searching a corresponding target speed in a preset speed table according to the refrigeration temperature difference; the speed meter records the corresponding moving speed of the spoilers in different refrigeration temperature difference ranges;
Writing the target speed into the turbulent flow instruction so that the driving motor controls the turbulent flow plate to move from an initial position to a target position according to the target speed after receiving the turbulent flow instruction; the initial position is a position where the spoiler is located when the spoiler does not block any one air duct path on the same side of the refrigerated air duct, and the target position is a position where the spoiler is located when the spoiler completely blocks any one air duct path on the same side of the refrigerated air duct.
As an improvement of the above, the method further comprises:
after the air door is closed, if the real-time refrigeration temperature is higher than the target refrigeration temperature and the refrigeration temperature difference is not within the temperature difference range, opening the air door;
and after the air door is opened, sending a recovery instruction to the driving motor so that the driving motor controls the spoiler to recover to the initial position.
Compared with the prior art, the refrigerator and the control method thereof disclosed by the embodiment of the invention have the advantages that the spoiler is arranged in the refrigerating air duct of the refrigerator to shield cold air flowing in the air inlet duct, in the refrigerating process of the refrigerator, when the temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is within the temperature difference range, the temperature of the refrigerating chamber is very close to the target refrigerating temperature at the moment, excessive cold air is not needed, in order to avoid the condition that the temperature of the refrigerating chamber is too low, the spoiler is controlled to gradually cover the air outlet of the refrigerating air duct to slowly reduce the air quantity at the outlet of the refrigerating air duct and reduce the falling speed of the temperature of the refrigerating chamber, and finally when the air door of the refrigerating air duct is completely closed, the residual small amount of cold air can enable the refrigerating chamber to be stably reduced to the target refrigerating temperature, so that the phenomenon that the air door of the refrigerating air duct is completely closed due to the target temperature under the condition that no measure of slowly reducing the air quantity exists can be avoided, the residual large amount of cold air enables the instantaneous temperature of the refrigerating chamber to be obviously lower than the target temperature, so that the temperature of the refrigerating chamber can be stably reduced to the target temperature.
Drawings
Fig. 1 is a schematic structural diagram of a refrigeration system in a refrigerator according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of the position of a damper provided by an embodiment of the present invention;
FIG. 4 is a schematic view of an outlet according to an embodiment of the present invention;
fig. 5 is a flowchart of a refrigerator control method according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for generating a spoiler instruction according to an embodiment of the present invention;
fig. 7 is a flowchart of another refrigerator control method according to an embodiment of the present invention.
100, a refrigerator; 10. a refrigeration air duct; 20. a spoiler module; 30. a controller; 11. a refrigerating chamber; 12. a freezing chamber; 13. a damper; 101. layering; 102. an air outlet; 1. a compressor; 2. a condenser; 3. an anti-condensation pipe; 4. drying the filter; 5. a capillary tube; 6. an evaporator; 7. a gas-liquid separator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a refrigeration system in a refrigerator 100 according to an embodiment of the present invention, where the refrigeration system includes a compressor 1, a condenser 2, a condensation preventing pipe 3, a drying filter 4, a capillary tube 5, an evaporator 6, and a gas-liquid separator 7. The working process of the refrigeration system comprises a compression process, a condensation process, a throttling process and an evaporation process.
Wherein, the compression process is as follows: the power cord of the refrigerator is plugged, when the contact of the temperature controller is connected, the compressor 1 starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor 1, and is compressed into high-temperature and high-pressure superheated gas in the cylinder of the compressor 1 and then is discharged into the condenser 2; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas is radiated by the condenser 2, the temperature is continuously reduced, the refrigerant gas is gradually cooled into normal-temperature and high-pressure saturated vapor and further cooled into saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as the condensation temperature, and the pressure of the refrigerant in the whole condensation process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid flows into the capillary tube 5 after moisture and impurities are filtered by the drying filter 4, throttling and pressure reduction are carried out through the capillary tube, and the refrigerant is changed into normal-temperature low-pressure wet vapor; the evaporation process is as follows: the normal temperature and low pressure wet steam starts to absorb heat for vaporization in the evaporator 6, which not only reduces the temperature of the evaporator and the surrounding, but also changes the refrigerant into low temperature and low pressure gas, the refrigerant from the evaporator 6 returns to the compressor 1 after passing through the gas-liquid separator 7, and the processes are repeated to transfer the heat in the refrigerator to the air outside the refrigerator, thereby realizing the purpose of refrigeration.
Because the air quantity controlled by the refrigerating chamber is controlled by a single air door at present, a large amount of cold air is instantaneously conveyed to refrigerate, and the problem of excessively low instantaneous refrigerating temperature is easily caused. The embodiment of the invention provides a refrigerator with a turbulence module in a refrigerating air duct, which can enable the temperature of a refrigerating chamber to be stably reduced to a target temperature by controlling the working process of the turbulence module, improve the stability of the temperature of the refrigerating chamber, save air volume and reduce power consumption. And the freezing chamber needs to store food materials at a lower temperature, and the influence of sudden temperature drop on the freezing chamber is small, so that the turbulence module does not need to be arranged in a freezing air channel.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a refrigerator 100 according to an embodiment of the present invention, where the refrigerator 100 includes:
a refrigerating air duct 10 provided in a refrigerating chamber of the refrigerator for supplying cold air to the refrigerating chamber;
the turbulence module 20 is arranged in the refrigeration air duct, comprises a turbulence plate for disturbing the wind flowing to the storage compartment to form turbulence so as to promote the temperature of the compartment to change in a balanced manner, and further comprises a driving motor for controlling the movement of the turbulence plate;
the air door is arranged at an air inlet of the refrigerating air duct, and the cold air subjected to heat exchange is conveyed into the refrigerating air duct through the air door;
The controller 30 is configured to:
acquiring the real-time refrigerating temperature and the target refrigerating temperature of the refrigerating chamber;
when the real-time refrigerating temperature is higher than the target refrigerating temperature and the refrigerating temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is within a preset temperature difference range, sending a turbulence instruction to the driving motor so as to enable the driving motor to move the position of the spoiler;
and when the real-time refrigerating temperature is detected to be less than or equal to the target refrigerating temperature, closing the air door.
In the refrigeration process of the refrigerator, when the temperature difference between the real-time refrigeration temperature and the target refrigeration temperature is within the temperature difference range, the temperature of the refrigerating chamber is close to the target refrigeration temperature at the moment, excessive cold air is not needed, the temperature of the refrigerating chamber is easy to drop suddenly due to the excessive cold air, in order to avoid that the temperature of the refrigerating chamber is too low, the spoiler is controlled to gradually cover the air outlet of the refrigerating air channel to slowly reduce the air quantity at the outlet of the refrigerating air channel at the moment, the dropping speed of the temperature of the refrigerating chamber is reduced, and finally when the air door of the refrigerating air channel is completely closed, the refrigerating chamber can be stably dropped to the target refrigeration temperature due to the residual small amount of cold air.
Optionally, the refrigeration air duct includes an air duct front plate and an air duct back plate covering the rear side of the air duct front plate, at least two air duct paths are arranged in the refrigeration air duct, and each air duct path corresponds to one air outlet;
the air outlets are arranged on two sides of the refrigerating air duct, the number of the air outlets corresponds to the number of the shelves in the refrigerating chamber, the size of each air outlet is the same, and the center of the air inlet of each air duct path on the same side of the refrigerating air duct is on the same vertical line;
the refrigerator comprises two spoiler modules which are respectively arranged at two sides of the refrigerating air channel, the spoilers are of long strip-shaped structures, one surfaces of the spoilers are in contact with the air channel back plate, and the driving motor can move the spoilers to shield the air channel path.
In an exemplary embodiment of the present invention, referring to fig. 3, fig. 3 shows a side of the refrigerator 100, where the refrigerator 100 includes a refrigerating chamber 11, a freezing chamber 12, and a damper 13, where the damper 13 is used to convey cold air flowing out from the evaporator 6 after heat exchange, and convey the cold air into the refrigerating air duct 10 through the damper, and then enter the refrigerating chamber through an air outlet of the air duct path. The air quantity flowing through each air channel path is the same, and the cold air quantity flowing through the air outlets is the same under the condition that the air outlets are the same in size, so that the cold quantity of the refrigerating chamber is prevented from being unevenly distributed. The center position of the air inlet of the air duct path is on the same vertical line, so that the spoiler can conveniently shield the air duct path at the same time. The refrigerator 100 according to the embodiment of the present invention includes two spoiler modules 20 respectively disposed at two sides of the refrigerating air duct 10, and the area of the refrigerating air duct 10 is large enough to cover the back of the whole refrigerator, so that the spoiler modules 20 are equivalently disposed at two sides of the refrigerating chamber of the refrigerator 100, and the air outlets are also disposed at two sides of the refrigerating chamber.
For example, referring to fig. 3, fig. 3 is a schematic diagram of the positions of the air outlets provided by the embodiment of the present invention, where the number of the air outlets 102 corresponds to the number of shelves 101 in the refrigerating compartment, that is, one shelf 101 may correspond to one air outlet 102, and the air outlets 102 are disposed on the corresponding shelf 101, for example, the air outlet 102 is disposed at a top corner of each shelf 101, so that each shelf 101 can feel cool air, and a situation that a part of the shelves 101 cannot feel cool air and thus the temperature is too high is avoided.
Optionally, before sending the spoiler instruction to the driving motor, the controller 30 is further configured to:
searching a corresponding target speed in a preset speed table according to the refrigeration temperature difference; the speed meter records the corresponding moving speed of the spoilers in different refrigeration temperature difference ranges;
writing the target speed into the disturbed flow instruction, so that the driving motor controls the disturbed flow plate to move from an initial position to a target position according to the target speed after receiving the disturbed flow instruction; the initial position is a position at which the spoiler is located when the spoiler does not block any air channel path on the same side of the refrigerating air channel, and the target position is a position at which the spoiler is located when the spoiler completely blocks any air channel path on the same side of the refrigerating air channel.
Illustratively, when the compressor starts to refrigerate, the spoiler module 20 is in the initial position, at this time, the spoiler module 20 does not block any one air duct path, the air outlet can normally discharge air, when the compressor starts to cool, the controller 30 collects a target refrigerating temperature of the refrigerating chamber of the refrigerator 100, which is set by a user, for example, the controller 30 collects user-selected gear information, each gear information corresponds to a refrigerating temperature, after the target refrigerating temperature is obtained, the real-time refrigerating temperature of the refrigerating chamber is detected in real time, then the refrigerating temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is calculated, and when the real-time refrigerating temperature is greater than the target refrigerating temperature and the refrigerating temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is within a preset temperature difference range, indicating that the temperature of the refrigerating chamber is very close to the target refrigerating temperature. For example, the temperature difference range is 1-3 ℃, when the target refrigeration temperature is 3 ℃, the real-time refrigeration temperature is detected to be 5 ℃, and the temperature of the refrigerating chamber is very close to the target refrigeration temperature, the corresponding target speed is searched in a preset speed table according to the refrigeration temperature difference, and then the target speed is written into the turbulence command, so that the driving motor controls the turbulence plate to move from the initial position to the target position according to the target speed after receiving the turbulence command.
It should be noted that the temperature difference range is divided into at least two groups of small temperature difference ranges, for example, the temperature difference range is 1-3 ℃, the divided small temperature difference ranges are [1,2) and [2,3], the moving speed of the spoiler is proportional to the size of the temperature difference range, that is, the moving speed corresponding to the temperature difference range [2,3] is greater than the temperature difference range corresponding to the temperature difference range [1,2 ]. In the moving process of driving the spoilers by the driving motor, the spoilers on two sides of the refrigerating chamber gradually shield air inlets of all air duct paths on the same side, at the moment, the amount of cold air flowing into the refrigerating chamber is gradually reduced, and the refrigerating chamber begins to slowly cool.
Optionally, when the real-time refrigerating temperature is detected to be less than or equal to the target refrigerating temperature, a damper arranged in the refrigerating air duct is closed.
For example, when the evaporator continuously performs a heat exchange operation to deliver cold air to the refrigerating chamber through the air door, when the controller 30 detects that the real-time refrigerating temperature is less than or equal to the target refrigerating temperature, it indicates that the temperature required by the refrigerating chamber has reached the temperature required by the user, and does not need to be cooled again, and at this time, the air door is closed, and the cold air generated by the evaporator cannot be transmitted to the refrigerating air duct 10.
Optionally, the controller 30 is further configured to:
after the air door is closed, if the real-time refrigeration temperature is higher than the target refrigeration temperature and the refrigeration temperature difference is not in the temperature difference range, opening the air door;
and after the air door is opened, sending a recovery instruction to the driving motor so that the driving motor controls the spoiler to recover to the initial position.
For example, after the air door is closed, the controller 30 still obtains the real-time refrigerating temperature of the refrigerating chamber in real time, when the real-time refrigerating temperature is detected to be greater than the target refrigerating temperature and the refrigerating temperature difference is not within the temperature difference range, it is indicated that the temperature of the refrigerating chamber is too high at this time, the air door needs to be reopened, and a reply instruction is sent to the driving motor to control the spoiler to return to the initial position, cold air generated by the evaporator after heat exchange continues to be conveyed into the refrigerating air duct 10 through the air door, at this time, the air duct path is not blocked by the spoiler, and cold air is discharged into the refrigerating chamber through the air outlet of the air duct path, so that the temperature of the refrigerating chamber is reduced, and when the temperature of the refrigerating chamber is reduced again to meet the refrigerating temperature difference within the preset temperature difference range, the controller 30 sends the spoiler command to the driving motor again to enable the driving motor to move the position of the spoiler, and the spoiler is controlled in a circulating manner so that the temperature of the refrigerating chamber tends to be stable.
Compared with the prior art, the refrigerator 100 disclosed by the embodiment of the invention has the advantages that the spoiler is arranged in the refrigerating air duct of the refrigerator to shield cold air flowing into the air duct, in the refrigerating process of the refrigerator, when the temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is within the temperature difference range, the temperature of the refrigerating chamber is very close to the target refrigerating temperature at the moment, excessive cold air is not needed, in order to avoid the condition that the temperature of the refrigerating chamber is too low, the spoiler is controlled to gradually cover the air outlet of the refrigerating air duct to slowly reduce the air quantity at the outlet of the refrigerating air duct and reduce the falling speed of the temperature of the refrigerating chamber, and finally, when the air door of the refrigerating air duct is completely closed, the residual small amount of cold air can enable the refrigerating chamber to be stably reduced to the target refrigerating temperature, so that the phenomenon that the air door of the refrigerating air duct is completely closed due to the fact that the air quantity is not slowly reduced, the residual large amount of cold air enables the instantaneous temperature of the refrigerating chamber to be obviously lower than the target temperature, so that the temperature of the refrigerating chamber can be stably reduced to the target temperature.
Referring to fig. 4, fig. 4 is a flowchart of a refrigerator control method according to an embodiment of the present invention, where the refrigerator control method according to the embodiment of the present invention is implemented by a controller in a refrigerator, the refrigerator includes a refrigerating air duct and an air door disposed in a refrigerating chamber of the refrigerator for providing cold air to the refrigerating chamber, a spoiler module is disposed in the refrigerating air duct, the spoiler module includes a spoiler for disturbing air flowing to a storage compartment to form turbulence to promote temperature equilibrium change of the storage compartment, and a driving motor for controlling movement of the spoiler, and the cold air after heat exchange is delivered to the refrigerating air duct through the air door; then, the method includes steps S1-S3:
S1, acquiring the real-time refrigerating temperature and the target refrigerating temperature of the refrigerating chamber;
s2, when the real-time refrigeration temperature is larger than the target refrigeration temperature and the refrigeration temperature difference between the real-time refrigeration temperature and the target refrigeration temperature is within a preset temperature difference range, sending a turbulence instruction to the driving motor to enable the driving motor to move the position of the turbulence plate;
and S3, closing the air door when the real-time refrigerating temperature is detected to be less than or equal to the target refrigerating temperature.
It should be noted that the refrigerator provided by the embodiment of the present invention includes a compressor, a condenser, a condensation preventing pipe, a dry filter, a capillary tube, an evaporator, and a gas-liquid separator. The working processes of the refrigeration of the system comprise a compression process, a condensation process, a throttling process and an evaporation process. Wherein, the compression process is as follows: the power cord of the refrigerator is plugged, and under the condition that the contact of the temperature controller is connected, the compressor starts to work, the low-temperature and low-pressure refrigerant is sucked by the compressor, and is compressed into high-temperature and high-pressure superheated gas in the cylinder of the compressor and then is discharged into the condenser; the condensation process is as follows: the high-temperature and high-pressure refrigerant gas is radiated by the condenser, the temperature is continuously reduced, the refrigerant gas is gradually cooled to be saturated vapor with normal temperature and high pressure, the refrigerant gas is further cooled to be saturated liquid, the temperature is not reduced any more, the temperature at the moment is called as the condensation temperature, and the pressure of the refrigerant in the whole condensation process is almost unchanged; the throttling process is as follows: the condensed refrigerant saturated liquid flows into a capillary tube after being filtered by a drying filter to remove moisture and impurities, throttling and pressure reduction are carried out through the capillary tube, and the refrigerant is changed into normal-temperature low-pressure wet vapor; the evaporation process is as follows: the normal temperature and low pressure wet steam starts to absorb heat to vaporize in the evaporator, so that the temperature of the evaporator and the surrounding temperature of the evaporator are reduced, the refrigerant is changed into low temperature and low pressure gas, the refrigerant from the evaporator returns to the compressor after passing through the gas-liquid separator, the processes are repeated, the heat in the refrigerator is transferred to the air outside the refrigerator, and the aim of refrigeration is fulfilled.
In the refrigeration process of the refrigerator, when the temperature difference between the real-time refrigeration temperature and the target refrigeration temperature is within the temperature difference range, the temperature of the refrigerating chamber is very close to the target refrigeration temperature at the moment, excessive cold air is not needed, the temperature of the refrigerating chamber is easily suddenly reduced due to the excessive cold air, in order to avoid that the temperature of the refrigerating chamber is too low, the spoiler is controlled to gradually cover the air outlet of the refrigerating air channel to slowly reduce the air quantity at the outlet of the refrigerating air channel at the moment, the reduction speed of the temperature of the refrigerating chamber is reduced, and finally when the air door of the refrigerating air channel is completely closed, the refrigerating chamber can be stably reduced to the target refrigeration temperature due to the small amount of residual cold air.
Optionally, the refrigeration air duct includes an air duct front plate and an air duct back plate covering the rear side of the air duct front plate, at least two air duct paths are arranged in the refrigeration air duct, and each air duct path corresponds to one air outlet;
the air outlets are arranged on two sides of the refrigerating air duct, the number of the air outlets corresponds to the number of the shelves in the refrigerating chamber, the size of each air outlet is the same, and the center positions of the air inlets of the air duct paths on the same side of the refrigerating air duct are on the same vertical line;
The refrigerator comprises two spoiler modules which are respectively arranged at two sides of the refrigerating air channel, the spoilers are of long strip-shaped structures, one surfaces of the spoilers are in contact with the air channel back plate, and the driving motor can move the spoilers to shield the air channel path.
Illustratively, in the embodiment of the present invention, the damper is configured to convey cool air flowing out from the evaporator after heat exchange, and convey this cool air into the refrigerating duct through the damper, and then enter the refrigerating chamber through the air outlet of the duct path. The air quantity flowing through each air channel path is the same, and the cold air quantity flowing through the air outlets is the same under the condition that the air outlets are the same in size, so that the cold quantity of the refrigerating chamber is prevented from being unevenly distributed. The center position of the air inlet of the air duct path is on the same vertical line, so that the spoiler can conveniently shield the air duct path at the same time. The refrigerator provided by the embodiment of the invention comprises two turbulence modules which are respectively arranged at two sides of the refrigerating air duct, the area of the refrigerating air duct is large enough to cover the back of the whole refrigerator, the turbulence modules are equivalently arranged at two sides of a refrigerating chamber of the refrigerator, and the air outlets are also arranged at two sides of the refrigerating chamber.
Exemplarily, the number of air outlets corresponds to the number of shelves in the refrigerating chamber, that is, one shelf can correspond to one air outlet, and the air outlet is arranged on the corresponding shelf, for example, the air outlet is arranged at the top corner of each shelf, so that each shelf can feel cold air, and the condition that the temperature is too high due to the fact that part of shelves cannot feel cold air is avoided.
Optionally, referring to fig. 5, before sending the spoiler command to the driving motor, the refrigerator control method further includes steps S21 to S22:
s21, searching a corresponding target speed in a preset speed table according to the refrigeration temperature difference; the speed meter records the corresponding moving speed of the spoilers in different refrigeration temperature difference ranges;
s22, writing the target speed into the spoiler instruction, so that the driving motor controls the spoiler to move from an initial position to a target position according to the target speed after receiving the spoiler instruction; the initial position is a position at which the spoiler is located when the spoiler does not block any air channel path on the same side of the refrigerating air channel, and the target position is a position at which the spoiler is located when the spoiler completely blocks any air channel path on the same side of the refrigerating air channel.
Illustratively, when the compressor starts to refrigerate, the flow disturbing module is in the initial position, and at this time, the flow disturbing module does not block any air duct path, the air outlet can normally discharge air, when the compressor starts to refrigerate, the controller collects target refrigerating temperature of the refrigerating chamber of the refrigerator set by a user, for example, the controller collects gear information selected by the user, each gear information corresponds to a refrigerating temperature, after the target refrigerating temperature is obtained, the real-time refrigerating temperature of the refrigerating chamber is detected in real time, then the refrigerating temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is calculated, and when the real-time refrigerating temperature is greater than the target refrigerating temperature and the refrigerating temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is within a preset temperature difference range, indicating that the temperature of the refrigerating chamber is very close to the target refrigerating temperature. For example, the temperature difference range is 1-3 ℃, when the target refrigeration temperature is 3 ℃, the real-time refrigeration temperature is detected to be 5 ℃, and the temperature of the refrigerating chamber is very close to the target refrigeration temperature, the corresponding target speed is searched in a preset speed table according to the refrigeration temperature difference, and then the target speed is written into the turbulence command, so that the driving motor controls the turbulence plate to move from the initial position to the target position according to the target speed after receiving the turbulence command.
It should be noted that the temperature difference range is divided into at least two groups of small temperature difference ranges, for example, the temperature difference range is 1-3 ℃, the divided small temperature difference ranges are [1,2) and [2,3], the moving speed of the spoiler is proportional to the size of the temperature difference range, that is, the moving speed corresponding to the temperature difference range [2,3] is greater than the temperature difference range corresponding to the temperature difference range [1,2 ]. In the moving process of driving the spoilers by the driving motor, the spoilers on two sides of the refrigerating chamber gradually shield air inlets of all air duct paths on the same side, at the moment, the amount of cold air flowing into the refrigerating chamber is gradually reduced, and the refrigerating chamber begins to slowly cool.
Specifically, in step S3, when the evaporator continuously performs heat exchange operation to deliver cold air to the refrigerating chamber through the air door, when the controller detects that the real-time refrigerating temperature is less than or equal to the target refrigerating temperature, it indicates that the temperature required by the refrigerating chamber has reached the temperature required by the user, and the temperature does not need to be lowered, and at this time, the air door is closed, the cold air generated by the evaporator cannot be transmitted to the refrigerating air duct, and before the air door is closed, the temperature of the refrigerating chamber is stably lowered to the target refrigerating temperature through the turbulent flow effect of the spoiler, so that a situation that the instantaneous temperature of the refrigerating chamber is significantly lower than the target temperature due to a large amount of residual cold air after the air door of the refrigerating air duct is completely closed due to reaching the target temperature can be avoided.
Optionally, referring to fig. 6, fig. 6 is a flowchart of another refrigerator control method provided in the embodiment of the present invention, where the refrigerator control method further includes steps S4 to S5:
s4, after the air door is closed, if the real-time refrigeration temperature is higher than the target refrigeration temperature and the refrigeration temperature difference is not in the temperature difference range, opening the air door;
and S5, after the air door is opened, sending a recovery instruction to the driving motor so that the driving motor controls the spoiler to recover to the initial position.
Specifically, in steps S4 to S5, after the air door is closed, the controller still obtains the real-time refrigerating temperature of the refrigerating chamber in real time, and when it is detected that the real-time refrigerating temperature is greater than the target refrigerating temperature and the refrigerating temperature difference is not within the temperature difference range, it indicates that the temperature of the refrigerating chamber is too high at this time, the air door needs to be re-opened, and a return instruction is sent to the driving motor to control the spoiler to return to the initial position, cold air generated by the evaporator after heat exchange continues to be delivered into the refrigerating air duct through the air door, at this time, the spoiler does not block the air duct path, cold air is discharged into the refrigerating chamber through the air outlet of the air duct path to lower the temperature of the refrigerating chamber, and when the temperature of the refrigerating chamber is reduced again to meet the requirement that the refrigerating temperature difference is within the preset temperature difference range, and the controller sends a turbulence instruction to the driving motor again so that the driving motor moves the position of the spoiler, and the spoiler is controlled in a circulating and reciprocating manner so as to enable the temperature of the refrigerating chamber to tend to be stable.
Compared with the prior art, the refrigerator control method disclosed by the embodiment of the invention has the advantages that the spoiler is arranged in the refrigerating air duct of the refrigerator to shield cold air flowing in the air inlet duct, in the refrigerating process of the refrigerator, when the temperature difference between the real-time refrigerating temperature and the target refrigerating temperature is within the temperature difference range, the temperature of the refrigerating chamber is very close to the target refrigerating temperature at the moment, excessive cold air is not needed, in order to avoid the too low temperature of the refrigerating chamber, the spoiler is controlled to gradually cover the air outlet of the refrigerating air duct to slowly reduce the air quantity at the outlet of the refrigerating air duct and reduce the falling speed of the temperature of the refrigerating chamber, and finally, when the air door of the refrigerating air duct is completely closed, the residual small amount of cold air can also enable the refrigerating chamber to be stably reduced to the target refrigerating temperature, so that the air door of the refrigerating air duct can be completely closed due to reach the target temperature under the condition that no air quantity slow reduction measure is taken, the residual large amount of cold air enables the instantaneous temperature of the refrigerating chamber to be obviously lower than the target temperature, so that the temperature of the refrigerating chamber can be stably reduced to the target temperature.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A refrigerator, characterized by comprising:
the refrigerating air duct is arranged in the refrigerating chamber of the refrigerator and used for providing cold air for the refrigerating chamber;
the turbulence module is arranged in the refrigerating air duct, comprises a turbulence plate and a driving motor, wherein the turbulence plate is used for disturbing wind flowing to the storage chamber to form turbulence so as to promote the temperature of the storage chamber to change in a balanced manner;
the air door is arranged at an air inlet of the refrigerating air duct, and the cold air subjected to heat exchange is conveyed into the refrigerating air duct through the air door;
the controller is configured to:
acquiring the real-time refrigerating temperature and the target refrigerating temperature of the refrigerating chamber;
when the real-time refrigeration temperature is greater than the target refrigeration temperature and the refrigeration temperature difference between the real-time refrigeration temperature and the target refrigeration temperature is within a preset temperature difference range, sending a turbulence instruction to the driving motor so that the driving motor moves the position of the spoiler;
and when the real-time refrigerating temperature is detected to be less than or equal to the target refrigerating temperature, closing the air door.
2. The refrigerator as claimed in claim 1, wherein the refrigerating air duct includes a front air duct plate and a back air duct plate covering the rear side of the front air duct plate, at least two air duct paths are provided in the refrigerating air duct, and each air duct path corresponds to an air outlet;
The air outlets are arranged on two sides of the refrigerating air duct, the number of the air outlets corresponds to the number of the shelves in the refrigerating chamber, the size of each air outlet is the same, and the center positions of the air inlets of the air duct paths on the same side of the refrigerating air duct are on the same vertical line;
the refrigerator comprises two spoiler modules which are respectively arranged on two sides of the refrigerating air channel, the spoilers are of long strip-shaped structures, one surfaces of the spoilers are in contact with the air channel back plate, and the driving motor is used for moving the positions of the spoilers to shield the air channel path.
3. The refrigerator of claim 1, wherein prior to sending the spoiler command to the drive motor, the controller is further configured to:
searching a corresponding target speed in a preset speed table according to the refrigeration temperature difference; the speed meter records the corresponding moving speed of the spoilers in different refrigeration temperature difference ranges;
writing the target speed into the disturbed flow instruction, so that the driving motor controls the disturbed flow plate to move from an initial position to a target position according to the target speed after receiving the disturbed flow instruction; the initial position is a position at which the spoiler is located when the spoiler does not block any air channel path on the same side of the refrigerating air channel, and the target position is a position at which the spoiler is located when the spoiler completely blocks any air channel path on the same side of the refrigerating air channel.
4. The refrigerator of claim 1, wherein the controller is further configured to:
after the air door is closed, if the real-time refrigeration temperature is higher than the target refrigeration temperature and the refrigeration temperature difference is not within the temperature difference range, opening the air door;
and after the air door is opened, sending a recovery instruction to the driving motor so that the driving motor controls the spoiler to recover to the initial position.
5. The refrigerator control method is characterized in that the refrigerator comprises a refrigerating air duct arranged in a refrigerating chamber of the refrigerator and used for providing cold air for the refrigerating chamber, a turbulence module and an air door are arranged in the refrigerating air duct, the turbulence module comprises a turbulence plate and a driving motor, the turbulence plate is used for disturbing the air flowing to a storage chamber to form turbulence so as to promote the temperature of the storage chamber to change in a balanced manner, the driving motor is used for controlling the movement of the turbulence plate, and the cold air after heat exchange is conveyed into the refrigerating air duct through the air door; then, the method comprises:
acquiring the real-time refrigerating temperature and the target refrigerating temperature of the refrigerating chamber;
when the real-time refrigeration temperature is greater than the target refrigeration temperature and the refrigeration temperature difference between the real-time refrigeration temperature and the target refrigeration temperature is within a preset temperature difference range, sending a turbulence instruction to the driving motor so that the driving motor moves the position of the spoiler;
And when the real-time refrigerating temperature is detected to be less than or equal to the target refrigerating temperature, closing the air door.
6. The method as claimed in claim 5, wherein the refrigerating air duct includes a front air duct plate and a back air duct plate covering the rear side of the front air duct plate, at least two air duct paths are provided in the refrigerating air duct, and each air duct path corresponds to an air outlet;
the air outlets are arranged on two sides of the refrigerating air duct, the number of the air outlets corresponds to the number of the shelves in the refrigerating chamber, the size of each air outlet is the same, and the center positions of the air inlets of the air duct paths on the same side of the refrigerating air duct are on the same vertical line;
the refrigerator comprises two spoiler modules which are respectively arranged on two sides of the refrigerating air channel, the spoilers are of long strip-shaped structures, one surfaces of the spoilers are in contact with the air channel back plate, and the driving motor is used for moving the positions of the spoilers to shield the air channel path.
7. The method as claimed in claim 5, wherein before transmitting the disturbance command to the driving motor, the method further comprises:
Searching a corresponding target speed in a preset speed table according to the refrigeration temperature difference; the speed meter records the corresponding moving speed of the spoilers in different refrigeration temperature difference ranges;
writing the target speed into the disturbed flow instruction, so that the driving motor controls the disturbed flow plate to move from an initial position to a target position according to the target speed after receiving the disturbed flow instruction; the initial position is a position at which the spoiler is located when the spoiler does not block any air channel path on the same side of the refrigerating air channel, and the target position is a position at which the spoiler is located when the spoiler completely blocks any air channel path on the same side of the refrigerating air channel.
8. The method of controlling a refrigerator of claim 5, wherein the method further comprises:
after the air door is closed, if the real-time refrigeration temperature is higher than the target refrigeration temperature and the refrigeration temperature difference is not within the temperature difference range, opening the air door;
and after the air door is opened, sending a recovery instruction to the driving motor so that the driving motor controls the spoiler to recover to the initial position.
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Cited By (1)
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| CN114279162A (en) * | 2021-12-28 | 2022-04-05 | 珠海格力电器股份有限公司 | Control method and device of air-cooled refrigerator and refrigerator |
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Country or region after: Zhong Guo Address after: 266000 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant after: Hisense refrigerator Co.,Ltd. Address before: 266736 No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. Country or region before: Zhong Guo |
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