CN117268006A - Refrigerator and ice making control method thereof - Google Patents

Abstract

The invention discloses a refrigerator and an ice making control method thereof, wherein a weight sensor component is arranged at the bottom of an ice storage box, and whether the ice making grid has residual ice blocks is judged by comparing the actual ice making amount with a preset value of the single ice making amount, so that the ice turning failure is solved by adopting corresponding measures, and the phenomenon that the next water injection overflows due to the fact that the ice blocks remain in the ice storage box, so that ice blocks are adhered to influence users to take ice is avoided. Meanwhile, the weight sensor can detect the ice storage amount of the ice storage box, so that different ice making modes can be adopted according to different ice amounts, the ice making speed and different compressor operating frequencies can be adjusted, the ice making on demand can be realized, the noise is reduced, meanwhile, the efficient ice making and energy saving are realized, and the user experience is greatly improved.

Description

Refrigerator and ice making control method thereof

Technical Field

The invention relates to the technical field of ice machines, in particular to an ice machine and a control method thereof.

Background

Currently, refrigerators have been spread around the world with ice making machines, which typically have ice storage bins, or drawers. The ice maker of the refrigerator is characterized in that water is injected into the ice making grid, and after the water injection is finished, the ice making grid is refrigerated, so that the water in the ice making grid is frozen into ice; then the ice turning/scraping operation is carried out, and ice cubes are turned/scraped from the ice making grid to the ice storage box; then water injection circulation is carried out. The incomplete turning/scraping of the ice will cause failure of the next water injection, the water quantity will exceed the original level of the ice making grid, and the ice cubes are adhered together after the ice making grid refrigerates, so that the user has difficulty in taking the ice. Currently, there is no better solution within the industry of this problem.

Disclosure of Invention

The embodiment of the invention aims to provide a refrigerator and an ice making control method thereof, which can effectively avoid the problem of ice adhesion caused by overflow of water injection next time because ice blocks remain in an ice box.

To achieve the above object, an embodiment of the present invention provides a refrigerator including:

the ice maker is arranged in the refrigerator body of the refrigerator and comprises,

making ice trays;

an ice bank;

the weight sensor is arranged at the bottom of the ice storage box;

the heating wire is arranged at the bottom of the ice making grid;

the ice making grid is used for making ice cubes after each water injection, and performing ice turning operation after ice making is completed, the ice storage box is used for storing the ice cubes, the weight sensor is used for detecting weight, and the heating wire is used for heating the ice making grid;

the controller is used for acquiring the water injection weight range during each water injection, the weight of the ice storage box before the ice making grid performs the ice turning operation, and the weight of the ice storage box after the ice making grid performs the ice turning operation;

wherein the water injection weight range includes a high water injection weight threshold and a low water injection weight threshold;

calculating a first weight difference between the weight after ice turning and the weight before ice turning;

when the first weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period.

As an improvement of the above solution, the controller is further configured to:

when the first weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid turns ice normally;

after the ice making grid is controlled to execute the ice turning operation again, acquiring the weight of the ice storage box after the secondary ice turning operation;

calculating a second weight difference value between the weight after the secondary ice turning and the weight before the ice turning;

when the second weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period;

and when the second weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid ice turning is normal.

As an improvement of the above, the refrigerator further includes:

the refrigerating system is arranged in the refrigerator body of the refrigerator and comprises a first compressor, a second compressor, a freezing evaporator, a condenser, an electromagnetic valve with three ports, a freezing capillary tube, a first ice making capillary tube and a second ice making capillary tube; wherein, the refrigerating system comprises the following three refrigerating loops:

A first refrigeration circuit comprising a first compressor, a condenser, a solenoid valve, a freezing capillary tube and a freezing evaporator; the first end and the second end of the electromagnetic valve are communicated, and the third end of the electromagnetic valve is closed;

the second refrigeration loop comprises a first compressor, a condenser, an electromagnetic valve, a first ice making capillary tube, an ice maker and a freezing evaporator; the first end and the third end of the electromagnetic valve are communicated, and the second end of the electromagnetic valve is closed;

the third refrigeration loop comprises a second compressor, a condenser, a second ice making capillary tube and an ice maker.

As an improvement of the above solution, the controller is further configured to:

acquiring the ice storage temperature of the ice storage box;

when the ice storage temperature is greater than or equal to a preset temperature threshold value, starting the first compressor and controlling the second refrigeration loop to operate;

when the ice storage temperature is smaller than the temperature threshold value, starting the first compressor and controlling the first refrigeration loop to operate;

and when the weight before turning ice is equal to the ice-free weight of the ice storage box when ice is not present, starting the second compressor and controlling the third refrigeration circuit to operate.

As an improvement of the above solution, the controller is further configured to:

When the weight before ice turning is larger than or equal to a preset ice full weight threshold value, controlling the first compressor to run at a preset low rotating speed;

when the weight before ice turning is smaller than the ice full weight threshold and is larger than or equal to a preset sub-ice full weight threshold, controlling the first compressor to run at a preset intermediate speed;

and when the weight before turning ice is smaller than the threshold value of the weight of the secondary full ice and is larger than the ice-free weight of the ice storage box when ice is not present, controlling the first compressor to operate at a preset high rotating speed.

In order to achieve the above purpose, the embodiment of the invention also provides an ice making control method of the refrigerator, wherein an ice maker is arranged in the refrigerator, and comprises an ice making grid, an ice storage box, a weight sensor arranged at the bottom of the ice storage box and a heating wire arranged at the bottom of the ice making grid; the ice making grid is used for making ice cubes after each water injection, and performing ice turning operation after ice making is completed, the ice storage box is used for storing the ice cubes, the weight sensor is used for detecting weight, and the heating wire is used for heating the ice making grid; the ice-making control method of the refrigerator includes:

acquiring a water injection weight range during each water injection, the weight of the ice storage box before the ice making grid performs the ice turning operation, and the weight of the ice storage box after the ice making grid performs the ice turning operation; wherein the water injection weight range includes a high water injection weight threshold and a low water injection weight threshold;

Calculating a first weight difference between the weight after ice turning and the weight before ice turning;

when the first weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period.

As an improvement of the above, the ice making control method of a refrigerator further includes:

when the first weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid turns ice normally;

after the ice making grid is controlled to execute the ice turning operation again, acquiring the weight of the ice storage box after the secondary ice turning operation;

calculating a second weight difference value between the weight after the secondary ice turning and the weight before the ice turning;

when the second weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period;

and when the second weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid ice turning is normal.

As an improvement of the scheme, the refrigerator further comprises a refrigerating system, wherein the refrigerating system is arranged in the refrigerator body of the refrigerator and comprises a first compressor, a second compressor, a freezing evaporator, a condenser, an electromagnetic valve with three ports, a freezing capillary tube, a first ice making capillary tube and a second ice making capillary tube; wherein, the refrigerating system comprises the following three refrigerating loops:

A first refrigeration circuit comprising a first compressor, a condenser, a solenoid valve, a freezing capillary tube and a freezing evaporator; the first end and the second end of the electromagnetic valve are communicated, and the third end of the electromagnetic valve is closed;

the second refrigeration loop comprises a first compressor, a condenser, an electromagnetic valve, a first ice making capillary tube, an ice maker and a freezing evaporator; the first end and the third end of the electromagnetic valve are communicated, and the second end of the electromagnetic valve is closed;

the third refrigeration loop comprises a second compressor, a condenser, a second ice making capillary tube and an ice maker.

As an improvement of the above, the ice making control method of a refrigerator further includes:

acquiring the ice storage temperature of the ice storage box;

when the ice storage temperature is greater than or equal to a preset temperature threshold value, starting the first compressor and controlling the second refrigeration loop to operate;

when the ice storage temperature is smaller than the temperature threshold value, starting the first compressor and controlling the first refrigeration loop to operate;

and when the weight before turning ice is equal to the ice-free weight of the ice storage box when ice is not present, starting the second compressor and controlling the third refrigeration circuit to operate.

As an improvement of the above, the ice making control method of a refrigerator further includes:

when the weight before ice turning is larger than or equal to a preset ice full weight threshold value, controlling the first compressor to run at a preset low rotating speed;

when the weight before ice turning is smaller than the ice full weight threshold and is larger than or equal to a preset sub-ice full weight threshold, controlling the first compressor to run at a preset intermediate speed;

and when the weight before turning ice is smaller than the threshold value of the weight of the secondary full ice and is larger than the ice-free weight of the ice storage box when ice is not present, controlling the first compressor to operate at a preset high rotating speed.

Compared with the prior art, the refrigerator and the ice making control method thereof disclosed by the embodiment of the invention have the advantages that the weight sensor component is arranged at the bottom of the ice storage box, the single ice making amount is calculated by calculating the flow and the water injection time of the pump, and whether the ice making grid has residual ice cubes is judged by comparing the actual ice making amount with the preset value of the single ice making amount, so that the ice turning failure is solved by adopting corresponding measures, and the phenomenon that the next water injection overflows due to the fact that the ice cubes remain in the ice storage box, the ice cubes are adhered and the ice taking of a user is influenced is avoided. Meanwhile, the weight sensor can detect the ice storage amount of the ice storage box, so that different ice making modes can be adopted according to different ice amounts, the ice making speed and different compressor operating frequencies can be adjusted, the ice making on demand can be realized, the noise is reduced, meanwhile, the efficient ice making and energy saving are realized, and the user experience is greatly improved.

Drawings

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

FIG. 2 is a schematic view of the installation position of a weight sensor in an ice maker according to an embodiment of the present invention;

fig. 3 is a first workflow diagram of a controller in a refrigerator according to an embodiment of the present invention;

fig. 4 is a second workflow diagram of a controller in a refrigerator according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a refrigeration system in a refrigerator according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first refrigeration circuit in a refrigerator according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second refrigeration circuit in a refrigerator according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a third refrigeration circuit in a refrigerator according to an embodiment of the present invention;

fig. 9 is a third workflow diagram of a controller in a refrigerator according to an embodiment of the present invention;

fig. 10 is a fourth operational flow diagram of a controller in a refrigerator according to an embodiment of the present invention;

fig. 11 is a flowchart of a method for controlling ice making of a refrigerator according to an embodiment of the present invention.

100 parts of a refrigerator; 10. an ice maker; 11. a weight sensor; 20. a first compressor; 30. a second compressor; 40. a freezing evaporator; 50. a condenser; 60. an electromagnetic valve; 61. a first end of the solenoid valve; 62. a second end of the solenoid valve; 63. a third end of the solenoid valve; 70. freezing the capillary tube; 80. a first ice-making capillary tube; 90. and a second ice-making capillary.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present application, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a refrigerator 100 according to an embodiment of the present invention, where the refrigerator 100 has an approximately rectangular parallelepiped shape, and includes a case defining a storage space and a plurality of door bodies disposed at an opening of the case, and the door bodies include a door body housing located outside the case, a door body liner located inside the case, an upper end cover, a lower end cover, and a heat insulating layer located between the door body housing, the door body liner, the upper end cover, and the lower end cover; typically, the insulating layer is filled with a foaming material. The cabinet is provided with a chamber including a component storage chamber for storing components in the refrigerator, such as a compressor, and a storage space for storing food and the like. The storage space may be partitioned into a plurality of storage compartments, which may be configured as a refrigerating compartment, a freezing compartment, and a temperature-changing compartment (also referred to as a multifunctional compartment) according to the purpose of use. Each storage compartment corresponds to one or more doors, for example, in fig. 1, the upper storage compartment is provided with a double door. The door body can be pivoted at the opening of the box body and can also be opened in a drawer mode, so that drawer type storage is realized.

In an embodiment of the present invention, an ice maker 10 is disposed in the refrigerator 100, and the ice maker 10 includes an ice tray, an ice bank, a weight sensor disposed at the bottom of the ice bank, and a heating wire disposed at the bottom of the ice tray; the ice making grid is used for making ice cubes after water is injected each time, and ice turning operation is performed after ice making is completed, the ice storage box is used for storing the ice cubes, the weight sensor is used for detecting the weight of the ice storage box, and the heating wire is used for heating the ice making grid so that the ice cubes adhered in the ice making grid fall off. Further, the water injection port in the ice making grid is connected with a water inlet pipe, a water pump is connected between the water inlet pipe and an external water source, and water can be pumped to the water injection port from the water source (a water storage box or an external water source) through the water pump, and finally enters the ice making grid.

Referring to fig. 2, fig. 2 is a schematic view of an installation position of a weight sensor 11 in an ice maker according to an embodiment of the present invention, the weight sensor 11 includes a plurality of weight sensors, and the plurality of weight sensors are uniformly distributed at the bottom of the ice bank and can be converted into usable output signals by sensing weight signals. M1 in fig. 2 is the ice bank weight in the low ice state (according to the preset value of the ice bank size), M2 is the ice bank weight in the sub-full ice state (according to the preset value of the ice bank size), and M3 is the ice bank weight in the full ice state (according to the preset value of the ice bank size).

In an embodiment of the present invention, the controller in the refrigerator 100 is configured to: acquiring a water injection weight range during each water injection, the weight of the ice storage box before the ice making grid performs the ice turning operation, and the weight of the ice storage box after the ice making grid performs the ice turning operation; wherein the water injection weight range includes a high water injection weight threshold and a low water injection weight threshold; calculating a first weight difference between the weight after ice turning and the weight before ice turning; when the first weight difference value is smaller than a low water injection weight threshold value, judging that the ice making grid turns over ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period; and when the first weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid turns ice normally.

Referring to fig. 3, fig. 3 is a first workflow diagram of a controller in a refrigerator according to an embodiment of the present invention, the controller being configured to perform steps S11 to S20:

and S11, judging whether the ice making grid completes one-time water injection, if so, entering a step S12, and if not, re-executing the step S11.

After the water injection is completed, the ice making grids need to be frozen into ice blocks by water placed on the ice making grids.

S12, after the ice making grid completes one water injection, acquiring a water injection weight range during each water injection, the weight before ice turning of the ice storage box before the ice making grid performs the ice turning operation and the weight after the ice turning of the ice storage box after the ice making grid performs the ice turning operation, and then entering into step S13.

The water injection weight range comprises a high water injection weight threshold value m+a and a low water injection weight threshold value m-a, m is the weight of each water injection amount, the unit time flow of the water pump is set to be s, the water injection time of each ice making is t, and the weight m=st of each water injection amount. Before each ice turning/scraping is finished, the controller collects the current weight M4 of the ice storage box through the weight sensor, when the ice turning/scraping is finished, ice cubes of the ice grid fall into the ice storage box, the weight of the ice storage box is increased, and under normal conditions, the increased weight of the ice storage box is equal to the weight m+/-a of each water injection amount (a is a preset error value).

S13, calculating a first weight difference value M5-M4 between the weight after ice turning and the weight before ice turning, and then entering step S14.

When the ice turning/scraping is finished, the weight M5 of the ice storage box after the ice turning is compared with the weight M4 of the ice storage box before the ice turning before the water injection is performed again.

S14, judging whether 0< M5-M4< M-a is met, if yes, entering a step S15, and if not, entering a step S18.

S15, when 0< M5-M4< M-a is met, judging that ice making grid turns over ice abnormally, controlling the heating wire to start, and then entering step S16.

The first weight difference M5-M4 is smaller than the low water injection weight threshold M-a, which indicates that the ice is turned over/scraped at this time, and the ice is left in the ice making grid, and the heating wire preset at the bottom of the ice making grid is started at this time, so that the remaining ice is separated from the ice grid by heating.

S16, judging whether the operation time of the heating wire reaches a preset time period, if so, entering a step S17, and if not, re-executing the step S16.

The operation time of the heating wire cannot be too long or too short, the ice cubes in the ice making grid are melted due to the fact that the operation time is too long, the whole ice cubes are small, meanwhile, melted water drops into the ice storage box to be contacted with the rest ice cubes when the ice making grid performs the ice turning operation again, and the ice cubes in the ice storage box are likely to be further frozen to adhere; too short a running time can cause insufficient heating of the heating wire, and when the ice making grid performs the ice turning operation again, ice cubes still adhere to the ice grid and do not fall off. For example, the preset time period is 2s.

And S17, after the running time of the heating wire reaches a preset time period, controlling the heating wire to stop working, and controlling the ice making grid to execute the ice turning operation again.

S18, when 0< M5-M4< M-a is not met, further judging whether the first weight difference value meets M-a and M5-M4 and m+a or not, if yes, entering a step S19, and if not, entering a step S20.

S19, if M-a is less than or equal to M5-M4 and less than or equal to m+a, judging that the ice making grid turns ice normally. At the moment, no residual ice blocks exist in the ice making grid, and the next water injection operation can be normally performed.

S20, the rest control logic.

In the embodiment of the invention, the weight sensor component is arranged at the bottom of the ice storage box, the single ice making amount is calculated by calculating the flow rate and the water injection time of the pump, and whether the ice making grid has residual ice blocks or not is judged by comparing the actual ice making amount with the preset value of the single ice making amount, so that the ice turning failure is solved by adopting corresponding measures, and the problem that the ice blocks are adhered due to the overflow of the next water injection caused by the residual ice blocks in the ice storage box and the ice taking of a user is influenced is avoided.

The controller is further configured to: after the ice making grid is controlled to execute the ice turning operation again, acquiring the weight of the ice storage box after the secondary ice turning operation; calculating a second weight difference value between the weight after the secondary ice turning and the weight before the ice turning; when the second weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period; and when the second weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid ice turning is normal.

Referring to fig. 4, fig. 4 is a second workflow diagram of a controller in a refrigerator according to an embodiment of the present invention, the controller being configured to perform steps S201 to S208:

s201, after the ice making grid is controlled to execute the ice turning operation again, the weight M6 of the ice storage box after the secondary ice turning operation is obtained, and then the step S202 is carried out.

S202, calculating a second weight difference value M6-M4 of the weight after the secondary ice turning and the weight before the ice turning, and then entering step S203.

S203, judging whether the second weight difference value meets M6-M4< M-a, if yes, proceeding to step S204, otherwise proceeding to step S207.

S204, when the second weight difference value meets M6-M4< M-a, judging that ice making grid ice turning is abnormal, controlling the heating wire to start, and then entering step S205.

When the second weight difference value is less than the low water injection weight threshold,

s205, judging whether the operation time of the heating wire reaches a preset time period, if so, entering a step S206, and if not, re-executing the step S205.

S206, after the running time of the heating wire reaches a preset time period, controlling the heating wire to stop working, and controlling the ice making grid to execute the ice turning operation again.

S207, when the second weight difference value does not meet M6-M4< M-a, further judging whether the second weight difference value meets M-a being less than or equal to M6-M4 being less than or equal to m+a, if yes, proceeding to step S208, otherwise proceeding to step S201.

S208, if M-a is less than or equal to M6-M4 is less than or equal to m+a, judging that the ice making grid turns ice normally. At the moment, no residual ice blocks exist in the ice making grid, and the next water injection operation can be normally performed.

The first heating wire heats the ice-making grid, the ice-making grid may not always turn all the ice cubes in the ice-making grid into the ice-box when the ice-making grid turns over again, and there may be some ice cubes remaining in the ice-making grid after the first heating wire heats the ice-making grid, at this time, the weight of the ice-box after the second ice-turning over and the weight of the ice-box before the first ice-turning over are subjected to a difference to obtain a second weight difference value, and according to the second weight difference value, it may be known whether there are any ice cubes remaining in the ice-making grid after the second ice-turning over operation, if there are any remaining ice cubes remaining, the heating wire heating operation is repeatedly performed until the second weight difference value is within a reasonable range, which indicates that there is no ice cubes remaining in the ice-making grid.

According to the embodiment of the invention, through the operation, whether the ice making grid turns over ice or scrapes ice abnormally or not can be recognized at maximum, and ice blocks remain; the water injection exceeds the water surface of the original ice making grid or overflows the ice making grid when the water injection is performed next time due to the fact that the ice blocks remain, the ice blocks made next time are bonded, the ice making reliability can be improved, and user experience is greatly improved.

In the prior art, the ice storage amount of the ice maker of the refrigerator is judged, whether the ice storage amount is full or not is generally detected by a pair of infrared probes or an ice detection rod, when the ice is full, the ice making is stopped, and when the ice is not full, the ice making is continued, the ice making in the mode is relatively single, and the energy saving and efficient ice making cannot be achieved by using a single operation frequency at the same annular temperature.

To solve this problem, in an embodiment of the present invention, a refrigerator having three refrigeration circuits is provided, and referring to fig. 5, fig. 5 is a schematic structural diagram of a refrigeration system in a refrigerator provided in an embodiment of the present invention, and the refrigerator 100 further includes:

a refrigerating system provided inside the cabinet of the refrigerator 100, including a first compressor 20, a second compressor 30, a freezing evaporator 40, a condenser 50, a solenoid valve 60 provided with three ports, a freezing capillary tube 70, a first ice-making capillary tube 80, and a second ice-making capillary tube 90; the refrigerating system comprises three refrigerating loops, namely a first refrigerating loop, a second refrigerating loop and a third refrigerating loop, wherein the first refrigerating loop and the second refrigerating loop can be operated alternatively, and the third refrigerating loop can be operated simultaneously with the first refrigerating loop or the second refrigerating loop.

Referring to fig. 6, fig. 6 is a schematic structural view of a first refrigeration circuit in a refrigerator according to an embodiment of the present invention, the first refrigeration circuit including a first compressor 20, a condenser 50, a solenoid valve 60, a freezing capillary tube 70, and a freezing evaporator 40; wherein the first end 61 and the second end 62 of the solenoid valve 60 are conductive, and the third end 63 of the solenoid valve 60 is closed.

Illustratively, the flow direction of the refrigerant at this time is: first compressor 20→condenser 50→solenoid valve 60→cryocapillary 70→cryoevaporator 40→first compressor 20. The freezing evaporator 40 is a single loop, the loop realizes the refrigeration of a freezing chamber (refrigerating chamber/air cooling), the refrigerating chamber and the freezing chamber perform cold air circulation through an air duct, the refrigerating chamber and the freezing chamber are controlled by an air door, the refrigerant passes through the freezing evaporator 60 to realize the refrigeration of the two chambers, and the refrigeration of the two chambers is the traditional air cooling box principle. The circuit is shortest, and the independent closing refrigeration of the ice machine is realized.

Referring to fig. 7, fig. 7 is a schematic view showing the structure of a second refrigeration circuit in a refrigerator according to an embodiment of the present invention, the second refrigeration circuit including a first compressor 20, a condenser 50, a solenoid valve 60, a first ice-making capillary tube 80, an ice maker 10, and a freezing evaporator 40; wherein the first end 61 and the third end 63 of the solenoid valve 60 are conductive, and the second end 62 of the solenoid valve 60 is closed.

Illustratively, the flow direction of the refrigerant is: first compressor 20→condenser 50→solenoid valve 60→first ice making capillary tube 80→ice maker 10→refrigeration evaporator 40→first compressor 20. The circuit realizes the refrigeration of the ice maker and the refrigeration (refrigeration). After the refrigerant enters the ice machine for refrigeration through capillary throttling, the refrigerant enters the freezing evaporator to realize refrigeration of the freezing chamber (refrigerating chamber/air cooling).

Referring to fig. 8, fig. 8 is a schematic diagram of a third refrigeration circuit in a refrigerator according to an embodiment of the present invention, the third refrigeration circuit including a second compressor 30, a condenser 50, a second ice-making capillary tube 90, and an ice maker 10.

Illustratively, the flow direction of the refrigerant at this time is: second compressor 30→condenser 50→second ice making capillary 90→ice maker 10→second compressor 30. The circuit realizes the independent refrigeration of the ice maker.

Specifically, in combination with the three refrigeration circuits, the controller is further configured to: acquiring the ice storage temperature of the ice storage box; when the ice storage temperature is greater than or equal to a preset temperature threshold value, starting the first compressor and controlling the second refrigeration loop to operate; when the ice storage temperature is smaller than the temperature threshold value, starting the first compressor and controlling the first refrigeration loop to operate; and when the weight before turning ice is equal to the ice-free weight of the ice storage box when ice is not present, starting the second compressor and controlling the third refrigeration circuit to operate.

Referring to fig. 9, fig. 9 is a third workflow diagram of a controller in a refrigerator according to an embodiment of the present invention, the controller further configured to perform steps S21 to S26:

s21, acquiring an ice storage temperature T of the ice storage box, the weight M4 before turning ice and a pre-measured ice-free weight M of the ice storage box when ice is absent, and then simultaneously entering steps S22 and S25.

S22, judging whether the ice storage temperature T is greater than or equal to a preset temperature threshold Tmax or not, namely, meeting the condition that T is greater than or equal to Tmax, if yes, entering a step S23, and if not, entering a step S24.

S23, when T is more than or equal to Tmax, starting the first compressor, and controlling the second refrigeration loop to operate.

S24, when T < Tmax, starting the first compressor and controlling the first refrigeration loop to operate;

and S25, judging whether the weight M4 before ice turning is equal to the ice-free weight M, namely meeting M4=M, if yes, entering a step S26, and if not, entering a step S22.

And S26, if M4=M, starting the second compressor and controlling the third refrigeration loop to operate.

Illustratively, the temperature sensing head temperature in the ice bank is checked, the first compressor is started when the ice bank temperature is detected to be higher than a temperature threshold Tmax, and the second refrigeration circuit is operated when the temperature in the ice bank is higher, and the ice maker needs to be refrigerated in order to avoid melting ice cubes. When the ice storage temperature is detected to be lower than the temperature threshold Tmax, the electromagnetic valve is controlled to be switched to a second refrigeration loop (the first compressor is kept in an operation state), the temperature of the ice storage box is low enough at the moment, the ice maker does not need to be refrigerated, and when the refrigeration temperature reaches the set requirement, the first compressor stops operating, and refrigeration is stopped. It should be noted that the temperature threshold Tmax may be set according to an empirical value, and is not particularly limited herein.

For example, when m4=m, it means that the ice bank is in a state of no ice, i.e., the user takes more ice at a time, and the ice is taken out. The first compressor and the second compressor are started at the moment, and the first refrigeration circuit and the third refrigeration circuit can be operated at the same time, or the second refrigeration circuit and the third refrigeration circuit can be operated at the same time. The refrigeration of the two channels can greatly reduce the time required by ice making and improve the ice making efficiency. Meanwhile, the display equipment of the refrigerator displays the ice-free state mark in real time at the moment, so that a user can clearly know the ice quantity.

Further, the controller is further configured to: when the weight before ice turning is larger than or equal to a preset ice full weight threshold value, controlling the first compressor to run at a preset low rotating speed; when the weight before ice turning is smaller than the ice full weight threshold and is larger than or equal to a preset sub-ice full weight threshold, controlling the first compressor to run at a preset intermediate speed; and when the weight before turning ice is smaller than the threshold value of the weight of the secondary full ice and is larger than the ice-free weight of the ice storage box when ice is not present, controlling the first compressor to operate at a preset high rotating speed.

Referring to fig. 10, fig. 10 is a fourth operation flowchart of a controller in a refrigerator according to an embodiment of the present invention, the controller further configured to perform steps S31 to S34:

s31, acquiring the weight M4 before ice turning, the ice-free weight M, the ice-full weight threshold M3 and the sub-full weight threshold M2, and then proceeding to the steps S32, S33 or S34.

S32, when the weight before ice turning is greater than or equal to a preset full ice weight threshold, namely M4 is more than or equal to M3, controlling the first compressor to run at a preset low rotating speed.

For example, when M4 is greater than or equal to M3, i.e. the ice storage box is full of ice, no ice making is required at this time, and ice making is finished, in order to ensure that ice cubes in the ice storage chamber are below-6 degrees, it is ensured that the ice cubes cannot melt, and the system needs to maintain a low-efficiency refrigeration mode. At the moment, only the temperature of ice cubes is maintained, ice making is not needed, the ice making load of the system is small, and the first compressor runs at a low rotating speed, so that low noise and energy conservation are realized. Meanwhile, the display equipment of the refrigerator displays the full ice state mark in real time at the moment, so that a user can clearly know the ice quantity. It is worth noting that it is necessary to determine whether to operate the first refrigeration circuit or the second refrigeration circuit according to the ice storage temperature.

S33, when the weight before ice turning is smaller than the ice full weight threshold and is larger than or equal to a preset sub-ice full weight threshold, namely M2 is smaller than or equal to M4 and is smaller than M3, controlling the first compressor to run at a preset intermediate speed.

When M2 is less than or equal to M4 and less than M3, the ice storage box is in a state of being in secondary full of ice, and the rotating speed of the first compressor is set to be a medium rotating speed at the moment, so that the refrigerating of the ice machine is realized, the refrigerating requirement is met, and meanwhile, the system is in the medium rotating speed, so that the noise is low and the energy is saved; meanwhile, the display equipment of the refrigerator displays the sign of the sub-full ice state in real time at the moment, so that a user can clearly know the ice quantity. It is worth noting that it is necessary to determine whether to operate the first refrigeration circuit or the second refrigeration circuit according to the ice storage temperature.

And S34, when the weight before turning ice is smaller than the threshold value of the weight of the secondary full ice and is larger than the ice-free weight of the ice storage box when ice is not present, namely M is less than or equal to M4 and less than M2, controlling the first compressor to operate at a preset high rotating speed.

When M is smaller than M4 and smaller than or equal to M2, the ice storage box is in a low-ice state, the rotating speed of the first compressor is increased to a high rotating speed mode, the rotating speed of the compressor is high, the refrigerating capacity is high, the refrigerating speed is greatly increased, and the common ice making requirement of a user is met. Meanwhile, the display equipment of the refrigerator displays the ice state mark in real time, so that a user can clearly know the ice amount.

It should be noted that the high rotation speed, the medium rotation speed and the low rotation speed of the first compressor may be set according to empirical values, which are not particularly limited herein.

Compared with the prior art, the refrigerator 100 disclosed by the embodiment of the invention has the advantages that the weight sensor component is arranged at the bottom of the ice storage box, the single-time ice making amount is calculated by calculating the flow and the water injection time of the pump, and whether the ice making grid has residual ice blocks or not is judged by comparing the actual ice making amount with the preset value of the single-time ice making amount, so that the ice turning failure is solved by adopting corresponding measures, and the phenomenon that the next water injection overflows due to the fact that the ice blocks remain in the ice box, the ice blocks are adhered and the ice taking of a user is influenced is avoided. Meanwhile, the weight sensor can detect the ice storage amount of the ice storage box, so that different ice making modes can be adopted according to different ice amounts, the ice making speed and different compressor operating frequencies can be adjusted, the ice making on demand can be realized, the noise is reduced, meanwhile, the efficient ice making and energy saving are realized, and the user experience is greatly improved.

Referring to fig. 11, fig. 11 is a flowchart of a method for controlling ice making of a refrigerator according to an embodiment of the present invention. The ice making control method of the refrigerator is implemented by a controller in the refrigerator, an ice maker is arranged in the refrigerator, and the ice maker comprises an ice making grid, an ice storage box, a weight sensor arranged at the bottom of the ice storage box and a heating wire arranged at the bottom of the ice making grid; the ice making grid is used for making ice cubes after each water injection, and performing ice turning operation after ice making is completed, the ice storage box is used for storing the ice cubes, the weight sensor is used for detecting weight, and the heating wire is used for heating the ice making grid; the ice-making control method of the refrigerator includes:

S1, acquiring a water injection weight range during each water injection, the weight of the ice storage box before the ice making grid performs the ice turning operation, and the weight of the ice storage box after the ice making grid performs the ice turning operation;

s2, calculating a first weight difference value between the weight after ice turning and the weight before ice turning;

and S3, when the first weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period.

Specifically, in step S1, the ice-making tray needs to freeze water placed on the ice-making tray into ice cubes each time after water injection is completed. The water injection weight range comprises a high water injection weight threshold value m+a and a low water injection weight threshold value m-a, m is the weight of each water injection amount, the unit time flow of the water pump is set to be s, the water injection time of each ice making is t, and the weight m=st of each water injection amount. Before each ice turning/scraping is finished, the controller collects the current weight M4 of the ice storage box through the weight sensor, when the ice turning/scraping is finished, ice cubes of the ice grid fall into the ice storage box, the weight of the ice storage box is increased, and under normal conditions, the increased weight of the ice storage box is equal to the weight m+/-a of each water injection amount (a is a preset error value).

Specifically, in step S2, when the ice-turning/scraping is finished, the water injection is performed again before the ice-turning is performed by comparing the ice bank weight M5 after the ice-turning with the ice bank weight M4 before the ice-turning.

Specifically, in step S3, the first weight difference M5-M4 is smaller than the low water injection weight threshold M-a, which indicates that the ice is turned over/scraped at this time, and the ice cubes remain in the ice making grid, and at this time, a heating wire preset at the bottom of the ice making grid is started, and the remaining ice cubes are separated from the ice grid by heating. The operation time of the heating wire cannot be too long or too short, the ice cubes in the ice making grid can be melted due to the too long operation time, the whole ice cubes are smaller, meanwhile, the melted water can drop into the ice storage box to be contacted with the rest ice cubes when the ice making grid performs the ice turning operation again, and the ice cubes in the ice storage box can be further frozen to be adhered; too short a running time can cause insufficient heating of the heating wire, and when the ice making grid performs the ice turning operation again, ice cubes still adhere to the ice grid and do not fall off. For example, the preset time period is 2s.

Further, the ice making control method further includes:

and when the first weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid turns ice normally.

For example, if M-a is less than or equal to M5-M4 is less than or equal to m+a, the ice making grid ice turning is judged to be normal. At the moment, no residual ice blocks exist in the ice making grid, and the next water injection operation can be normally performed.

In the embodiment of the invention, the weight sensor component is arranged at the bottom of the ice storage box, the single ice making amount is calculated by calculating the flow rate and the water injection time of the pump, and whether the ice making grid has residual ice blocks or not is judged by comparing the actual ice making amount with the preset value of the single ice making amount, so that the ice turning failure is solved by adopting corresponding measures, and the problem that the ice blocks are adhered due to the overflow of the next water injection caused by the residual ice blocks in the ice storage box and the ice taking of a user is influenced is avoided.

The ice making control method of the refrigerator further comprises the following steps: after the ice making grid is controlled to execute the ice turning operation again, acquiring the weight of the ice storage box after the secondary ice turning operation; calculating a second weight difference value between the weight after the secondary ice turning and the weight before the ice turning; when the second weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period; and when the second weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid ice turning is normal.

The first heating wire heats the ice-making grid, the ice-making grid may not always turn all the ice cubes in the ice-making grid into the ice-box when the ice-making grid turns over again, and there may be some ice cubes remaining in the ice-making grid after the first heating wire heats the ice-making grid, at this time, the weight of the ice-box after the second ice-turning over and the weight of the ice-box before the first ice-turning over are subjected to a difference to obtain a second weight difference value, and according to the second weight difference value, it may be known whether there are any ice cubes remaining in the ice-making grid after the second ice-turning over operation, if there are any remaining ice cubes remaining, the heating wire heating operation is repeatedly performed until the second weight difference value is within a reasonable range, which indicates that there is no ice cubes remaining in the ice-making grid.

According to the embodiment of the invention, through the operation, whether the ice making grid turns over ice or scrapes ice abnormally or not can be recognized at maximum, and ice blocks remain; the water injection exceeds the water surface of the original ice making grid or overflows the ice making grid when the water injection is performed next time due to the fact that the ice blocks remain, the ice blocks made next time are bonded, the ice making reliability can be improved, and user experience is greatly improved.

In the prior art, the ice storage amount of the ice maker of the refrigerator is judged, whether the ice storage amount is full or not is generally detected by a pair of infrared probes or an ice detection rod, when the ice is full, the ice making is stopped, and when the ice is not full, the ice making is continued, the ice making in the mode is relatively single, and the energy saving and efficient ice making cannot be achieved by using a single operation frequency at the same annular temperature. To solve this problem, a refrigerator having three refrigeration circuits is provided in an embodiment of the present invention.

The refrigerator further comprises a refrigerating system, wherein the refrigerating system is arranged in the refrigerator body of the refrigerator and comprises a first compressor, a second compressor, a freezing evaporator, a condenser, an electromagnetic valve with three ports, a freezing capillary tube, a first ice making capillary tube and a second ice making capillary tube; wherein, the refrigerating system comprises the following three refrigerating loops:

a first refrigeration circuit comprising a first compressor, a condenser, a solenoid valve, a freezing capillary tube and a freezing evaporator; the first end and the second end of the electromagnetic valve are communicated, and the third end of the electromagnetic valve is closed;

the second refrigeration loop comprises a first compressor, a condenser, an electromagnetic valve, a first ice making capillary tube, an ice maker and a freezing evaporator; the first end and the third end of the electromagnetic valve are communicated, and the second end of the electromagnetic valve is closed;

a third refrigeration circuit comprising a second compressor, a condenser, a second ice-making capillary tube and an ice maker;

the refrigerating system comprises three refrigerating loops, namely a first refrigerating loop, a second refrigerating loop and a third refrigerating loop, wherein the first refrigerating loop and the second refrigerating loop can be operated alternatively, and the third refrigerating loop can be operated simultaneously with the first refrigerating loop or the second refrigerating loop.

Illustratively, the flow direction of the refrigerant in the first refrigeration circuit is: first compressor→condenser→solenoid valve→freezing capillary→freezing evaporator→first compressor. The refrigerating evaporator is a single loop, the refrigerating of the freezing chamber (refrigerating chamber/air cooling) is realized by the single loop, the refrigerating chamber and the freezing chamber are subjected to cold air circulation through an air duct, the refrigerating of the two chambers can be realized by the refrigerating agent passing through the refrigerating evaporator under the control of an air door, and the refrigerating of the two chambers is the traditional air cooling box principle. The circuit is shortest, and the independent closing refrigeration of the ice machine is realized.

Illustratively, the flow direction of the refrigerant in the second refrigeration circuit is: first compressor, condenser, solenoid valve, first ice making capillary, ice maker, freezing evaporator, first compressor. The circuit realizes the refrigeration of the ice maker and the refrigeration (refrigeration). After the refrigerant enters the ice machine for refrigeration through capillary throttling, the refrigerant enters the freezing evaporator to realize refrigeration of the freezing chamber (refrigerating chamber/air cooling).

Illustratively, the flow direction of the refrigerant in the third refrigeration circuit is: second compressor→condenser→second ice making capillary→ice maker→second compressor. The circuit realizes the independent refrigeration of the ice maker.

Specifically, in combination with the three refrigeration loops, the ice making control method of the refrigerator further comprises the following steps: acquiring the ice storage temperature of the ice storage box; when the ice storage temperature is greater than or equal to a preset temperature threshold value, starting the first compressor and controlling the second refrigeration loop to operate; when the ice storage temperature is smaller than the temperature threshold value, starting the first compressor and controlling the first refrigeration loop to operate; and when the weight before turning ice is equal to the ice-free weight of the ice storage box when ice is not present, starting the second compressor and controlling the third refrigeration circuit to operate.

Illustratively, the temperature sensing head temperature in the ice bank is checked, the first compressor is started when the ice bank temperature is detected to be higher than a temperature threshold Tmax, and the second refrigeration circuit is operated when the temperature in the ice bank is higher, and the ice maker needs to be refrigerated in order to avoid melting ice cubes. When the ice storage temperature is detected to be lower than the temperature threshold Tmax, the electromagnetic valve is controlled to be switched to a second refrigeration loop (the first compressor is kept in an operation state), the temperature of the ice storage box is low enough at the moment, the ice maker does not need to be refrigerated, and when the refrigeration temperature reaches the set requirement, the first compressor stops operating, and refrigeration is stopped. It should be noted that the temperature threshold Tmax may be set according to an empirical value, and is not particularly limited herein.

For example, when m4=m, it means that the ice bank is in a state of no ice, i.e., the user takes more ice at a time, and the ice is taken out. The first compressor and the second compressor are started at the moment, and the first refrigeration circuit and the third refrigeration circuit can be operated at the same time, or the second refrigeration circuit and the third refrigeration circuit can be operated at the same time. The refrigeration of the two channels can greatly reduce the time required by ice making and improve the ice making efficiency. Meanwhile, the display equipment of the refrigerator displays the ice-free state mark in real time at the moment, so that a user can clearly know the ice quantity.

Further, the ice making control method of the refrigerator further comprises the following steps: when the weight before ice turning is larger than or equal to a preset ice full weight threshold value, controlling the first compressor to run at a preset low rotating speed; when the weight before ice turning is smaller than the ice full weight threshold and is larger than or equal to a preset sub-ice full weight threshold, controlling the first compressor to run at a preset intermediate speed; and when the weight before turning ice is smaller than the threshold value of the weight of the secondary full ice and is larger than the ice-free weight of the ice storage box when ice is not present, controlling the first compressor to operate at a preset high rotating speed.

For example, when M4 is greater than or equal to M3, i.e. the ice storage box is full of ice, no ice making is required at this time, and ice making is finished, in order to ensure that ice cubes in the ice storage chamber are below-6 degrees, it is ensured that the ice cubes cannot melt, and the system needs to maintain a low-efficiency refrigeration mode. At the moment, only the temperature of ice cubes is maintained, ice making is not needed, the ice making load of the system is small, and the first compressor runs at a low rotating speed, so that low noise and energy conservation are realized. Meanwhile, the display equipment of the refrigerator displays the full ice state mark in real time at the moment, so that a user can clearly know the ice quantity. It is worth noting that it is necessary to determine whether to operate the first refrigeration circuit or the second refrigeration circuit according to the ice storage temperature.

When M2 is less than or equal to M4 and less than M3, the ice storage box is in a state of being in secondary full of ice, and the rotating speed of the first compressor is set to be a medium rotating speed at the moment, so that the refrigerating of the ice machine is realized, the refrigerating requirement is met, and meanwhile, the system is in the medium rotating speed, so that the noise is low and the energy is saved; meanwhile, the display equipment of the refrigerator displays the sign of the sub-full ice state in real time at the moment, so that a user can clearly know the ice quantity. It is worth noting that it is necessary to determine whether to operate the first refrigeration circuit or the second refrigeration circuit according to the ice storage temperature.

When M is smaller than M4 and smaller than or equal to M2, the ice storage box is in a low-ice state, the rotating speed of the first compressor is increased to a high rotating speed mode, the rotating speed of the compressor is high, the refrigerating capacity is high, the refrigerating speed is greatly increased, and the common ice making requirement of a user is met. Meanwhile, the display equipment of the refrigerator displays the ice state mark in real time, so that a user can clearly know the ice amount.

It should be noted that the high rotation speed, the medium rotation speed and the low rotation speed of the first compressor may be set according to empirical values, which are not particularly limited herein.

Compared with the prior art, the ice making control method of the refrigerator disclosed by the embodiment of the invention has the advantages that the weight sensor component is arranged at the bottom of the ice storage box, the single ice making amount is calculated by calculating the flow and the water injection time of the pump, and whether the ice making grid has residual ice cubes is judged by comparing the actual ice making amount with the preset value of the single ice making amount, so that the ice turning fault is solved by adopting corresponding measures, and the phenomenon that the next water injection overflows due to the fact that the ice cubes remain in the ice storage box, the ice cubes are adhered and the ice taking of a user is influenced is avoided. Meanwhile, the weight sensor can detect the ice storage amount of the ice storage box, so that different ice making modes can be adopted according to different ice amounts, the ice making speed and different compressor operating frequencies can be adjusted, the ice making on demand can be realized, the noise is reduced, meanwhile, the efficient ice making and energy saving are realized, and the user experience is greatly improved.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (10)

1. A refrigerator, comprising:

the ice maker is arranged in the refrigerator body of the refrigerator and comprises,

making ice trays;

an ice bank;

the weight sensor is arranged at the bottom of the ice storage box;

the heating wire is arranged at the bottom of the ice making grid;

the ice making grid is used for making ice cubes after each water injection, and performing ice turning operation after ice making is completed, the ice storage box is used for storing the ice cubes, the weight sensor is used for detecting weight, and the heating wire is used for heating the ice making grid;

the controller is used for acquiring the water injection weight range during each water injection, the weight of the ice storage box before the ice making grid performs the ice turning operation, and the weight of the ice storage box after the ice making grid performs the ice turning operation;

wherein the water injection weight range includes a high water injection weight threshold and a low water injection weight threshold;

calculating a first weight difference between the weight after ice turning and the weight before ice turning;

when the first weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period.

2. The refrigerator of claim 1, wherein the controller is further configured to:

when the first weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid turns ice normally;

after the ice making grid is controlled to execute the ice turning operation again, acquiring the weight of the ice storage box after the secondary ice turning operation;

calculating a second weight difference value between the weight after the secondary ice turning and the weight before the ice turning;

when the second weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period;

and when the second weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid ice turning is normal.

3. The refrigerator of claim 1, further comprising:

the refrigerating system is arranged in the refrigerator body of the refrigerator and comprises a first compressor, a second compressor, a freezing evaporator, a condenser, an electromagnetic valve with three ports, a freezing capillary tube, a first ice making capillary tube and a second ice making capillary tube; wherein, the refrigerating system comprises the following three refrigerating loops:

A first refrigeration circuit comprising a first compressor, a condenser, a solenoid valve, a freezing capillary tube and a freezing evaporator; the first end and the second end of the electromagnetic valve are communicated, and the third end of the electromagnetic valve is closed;

the second refrigeration loop comprises a first compressor, a condenser, an electromagnetic valve, a first ice making capillary tube, an ice maker and a freezing evaporator; the first end and the third end of the electromagnetic valve are communicated, and the second end of the electromagnetic valve is closed;

the third refrigeration loop comprises a second compressor, a condenser, a second ice making capillary tube and an ice maker.

4. The refrigerator of claim 3, wherein the controller is further configured to:

acquiring the ice storage temperature of the ice storage box;

when the ice storage temperature is greater than or equal to a preset temperature threshold value, starting the first compressor and controlling the second refrigeration loop to operate;

when the ice storage temperature is smaller than the temperature threshold value, starting the first compressor and controlling the first refrigeration loop to operate;

and when the weight before turning ice is equal to the ice-free weight of the ice storage box when ice is not present, starting the second compressor and controlling the third refrigeration circuit to operate.

5. The refrigerator of claim 4, wherein the controller is further configured to:

when the weight before ice turning is larger than or equal to a preset ice full weight threshold value, controlling the first compressor to run at a preset low rotating speed;

when the weight before ice turning is smaller than the ice full weight threshold and is larger than or equal to a preset sub-ice full weight threshold, controlling the first compressor to run at a preset intermediate speed;

and when the weight before turning ice is smaller than the threshold value of the weight of the secondary full ice and is larger than the ice-free weight of the ice storage box when ice is not present, controlling the first compressor to operate at a preset high rotating speed.

6. The ice making control method of the refrigerator is characterized in that an ice making machine is arranged in the refrigerator and comprises an ice making grid, an ice storage box, a weight sensor arranged at the bottom of the ice storage box and a heating wire arranged at the bottom of the ice making grid; the ice making grid is used for making ice cubes after each water injection, and performing ice turning operation after ice making is completed, the ice storage box is used for storing the ice cubes, the weight sensor is used for detecting weight, and the heating wire is used for heating the ice making grid; the ice-making control method of the refrigerator includes:

acquiring a water injection weight range during each water injection, the weight of the ice storage box before the ice making grid performs the ice turning operation, and the weight of the ice storage box after the ice making grid performs the ice turning operation; wherein the water injection weight range includes a high water injection weight threshold and a low water injection weight threshold;

Calculating a first weight difference between the weight after ice turning and the weight before ice turning;

when the first weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period.

7. The ice-making control method for a refrigerator as claimed in claim 6, wherein said ice-making control method for a refrigerator further comprises:

when the first weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid turns ice normally;

after the ice making grid is controlled to execute the ice turning operation again, acquiring the weight of the ice storage box after the secondary ice turning operation;

calculating a second weight difference value between the weight after the secondary ice turning and the weight before the ice turning;

when the second weight difference value is smaller than the low water injection weight threshold value, judging that the ice making grid turns over the ice abnormally, and controlling the ice making grid to execute the ice turning operation again after controlling the operation of the heating wire in a preset time period;

and when the second weight difference value is larger than or equal to the low water injection weight threshold value and smaller than or equal to the high water injection weight threshold value, judging that the ice making grid ice turning is normal.

8. The ice-making control method for a refrigerator according to claim 6, wherein the refrigerator further comprises a refrigerating system, wherein the refrigerating system is arranged in the refrigerator body of the refrigerator and comprises a first compressor, a second compressor, a freezing evaporator, a condenser, a solenoid valve with three ports, a freezing capillary tube, a first ice-making capillary tube and a second ice-making capillary tube; wherein, the refrigerating system comprises the following three refrigerating loops:

a first refrigeration circuit comprising a first compressor, a condenser, a solenoid valve, a freezing capillary tube and a freezing evaporator; the first end and the second end of the electromagnetic valve are communicated, and the third end of the electromagnetic valve is closed;

the second refrigeration loop comprises a first compressor, a condenser, an electromagnetic valve, a first ice making capillary tube, an ice maker and a freezing evaporator; the first end and the third end of the electromagnetic valve are communicated, and the second end of the electromagnetic valve is closed;

the third refrigeration loop comprises a second compressor, a condenser, a second ice making capillary tube and an ice maker.

9. The ice-making control method for a refrigerator according to claim 8, further comprising:

acquiring the ice storage temperature of the ice storage box;

When the ice storage temperature is greater than or equal to a preset temperature threshold value, starting the first compressor and controlling the second refrigeration loop to operate;

when the ice storage temperature is smaller than the temperature threshold value, starting the first compressor and controlling the first refrigeration loop to operate;

and when the weight before turning ice is equal to the ice-free weight of the ice storage box when ice is not present, starting the second compressor and controlling the third refrigeration circuit to operate.

10. The ice-making control method for a refrigerator according to claim 9, further comprising:

when the weight before ice turning is larger than or equal to a preset ice full weight threshold value, controlling the first compressor to run at a preset low rotating speed;

when the weight before ice turning is smaller than the ice full weight threshold and is larger than or equal to a preset sub-ice full weight threshold, controlling the first compressor to run at a preset intermediate speed;

and when the weight before turning ice is smaller than the threshold value of the weight of the secondary full ice and is larger than the ice-free weight of the ice storage box when ice is not present, controlling the first compressor to operate at a preset high rotating speed.