Control method and device of refrigerating system, refrigerator and computer readable storage medium

Abstract

The invention provides a control method and device of a refrigeration system, a refrigerator and a storage medium, in the refrigeration system, the refrigerant amount distributed by a refrigeration evaporator can be larger than the refrigerant amount distributed by a freezing evaporator, and an adjusting assembly is used for adjusting the proportion of the refrigerant amount entering the refrigeration evaporator to the refrigerant amount entering the freezing evaporator; the control method comprises the steps that when a compressor is shut down, the first real-time temperature of a refrigeration chamber and the second real-time temperature of a freezing chamber are obtained; when the first real-time temperature reaches the refrigeration starting point temperature and / or the second real-time temperature reaches the freezing starting point temperature, a first thermal load of a refrigeration chamber and a second thermal load of a freezing chamber are obtained; according to the first thermal load and the second thermal load, the refrigerant distribution ratio of a liquid separator and the operation duration of a compressor are determined; and according to the refrigerant distribution ratio, the control adjusting assembly adjusts the amount of the refrigerant entering the refrigeration evaporator and the amount of the refrigerant entering the freezing evaporator according to the refrigerant distribution ratio.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and particularly to a control method and device for a refrigeration system, a refrigerator, and a computer-readable storage medium. Background Art

[0002] Dual-system refrigerators have the function of preventing odor cross-talk and are favored by users. A dual-system refrigerator includes two independently cooled refrigerating evaporators and freezing evaporators; the refrigerating evaporator supplies cold to the refrigerating compartment alone, and the freezing evaporator supplies cold to the freezing compartment alone. In the prior art, the refrigerating evaporator and the freezing evaporator are respectively connected to different outlets of a three-way valve; when both the refrigerating compartment and the freezing compartment are being cooled, the refrigerant flows through different outlets of the three-way valve to the refrigerating evaporator and the freezing evaporator, but there is a problem of uneven distribution of the refrigerant. Especially in a high-temperature environment, the refrigerating evaporator obtains less flow rate, resulting in poor refrigeration effect in the refrigerating compartment, and further making it difficult for the refrigeration system to meet the refrigeration requirements of freezing and refrigeration. Summary of the Invention

[0003] The present application provides a control method and device for a refrigeration system, a refrigerator, and a computer-readable storage medium, aiming to solve the technical problem that in the prior art, the refrigerating evaporator obtains less flow rate, resulting in poor refrigeration effect in the refrigerating compartment, and further making it difficult for the refrigeration system to meet the refrigeration requirements of freezing and refrigeration.

[0004] In a first aspect, the present application proposes a control method for a refrigeration system. The refrigeration system includes a compressor, a condenser, a liquid distributor, a refrigerating evaporator, and a freezing evaporator; the compressor, the condenser, and the liquid distributor are sequentially connected, the liquid distributor is connected to the refrigerating evaporator and the freezing evaporator, and enables the amount of refrigerant distributed to the refrigerating evaporator to be greater than the amount of refrigerant distributed to the freezing evaporator. The refrigerating evaporator and the freezing evaporator are connected to the compressor, and the liquid distributor includes an adjustment component for adjusting the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator; the control method includes:

[0005] When the compressor stops running, obtain the first real-time temperature of the refrigerating compartment and the second real-time temperature of the freezing compartment; wherein, the refrigerating evaporator is configured to provide cold to the refrigerating compartment, and the freezing evaporator is configured to provide cold to the freezing compartment;

[0006] When the first real-time temperature reaches the refrigerating start-up point temperature and / or the second real-time temperature reaches the freezing start-up point temperature, obtain the first heat load of the refrigerating compartment and the second heat load of the freezing compartment;

[0007] According to the first heat load and the second heat load, determine the refrigerant distribution ratio of the liquid distributor and the running duration of the compressor;

[0008] According to the refrigerant distribution ratio, control the regulating component to adjust the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the refrigerant distribution ratio;

[0009] Control the compressor to start up, and after running for the running duration, control the compressor to shut down.

[0010] Optionally, before obtaining the first heat load of the refrigerating compartment and the second heat load of the freezing compartment, the control method includes:

[0011] Obtain the ambient temperature, the refrigerating shutdown point temperature, and the freezing shutdown point temperature;

[0012] Determine the first heat load according to the first real-time temperature, the refrigerating shutdown point temperature, and the ambient temperature;

[0013] Determine the second heat load according to the second real-time temperature, the freezing shutdown point temperature, and the ambient temperature.

[0014] Optionally, the control method further includes:

[0015] Obtain the refrigeration gear;

[0016] The determining the refrigerant distribution ratio of the liquid distributor and the running duration of the compressor according to the first heat load and the second heat load includes:

[0017] Determine the running duration of the compressor according to the refrigeration gear, the first heat load, and the second heat load.

[0018] Optionally, determining the refrigerant distribution ratio of the liquid distributor and the running duration of the compressor according to the refrigeration gear, the first heat load, and the second heat load includes:

[0019] Determine the running speed of the compressor according to the refrigeration gear;

[0020] Determine the running duration of the compressor according to the first heat load, the second heat load, and the running speed.

[0021] Optionally, the control method further includes: when the first real-time temperature reaches the refrigerating startup point temperature and at the same time the second real-time temperature reaches the freezing startup point temperature, control the compressor to run for a preset duration, and control the regulating component to adjust the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the initial refrigerant distribution ratio.

[0022] Optionally, the control method further includes:

[0023] Obtain the operating state of the refrigerator;

[0024] When the operating state is a stable state, adjust the refrigeration start point temperature and the freezing start point temperature so that when the first real-time temperature reaches the refrigeration start point temperature, the second real-time temperature reaches the freezing start point temperature.

[0025] Optionally, during the operation of the compressor, the control method further includes:

[0026] Obtain the first real-time heat load of the refrigerated compartment and the second real-time heat load of the frozen compartment;

[0027] Adjust the refrigerant distribution ratio of the distributor according to the first real-time heat load, the second real-time heat load, and the operation duration;

[0028] Control the regulating component to adjust the refrigerant amount entering the refrigeration evaporator and the refrigerant amount entering the freezing evaporator according to the adjusted refrigerant distribution ratio.

[0029] In a second aspect, the present application also proposes a control device for a refrigeration system. The refrigeration system includes a compressor, a condenser, a distributor, a refrigeration evaporator, and a freezing evaporator; the compressor, the condenser, and the distributor are sequentially connected, the distributor communicates with the refrigeration evaporator and the freezing evaporator, and enables the refrigerant amount distributed to the refrigeration evaporator to be greater than the refrigerant amount distributed to the freezing evaporator, the refrigeration evaporator and the freezing evaporator are connected to the compressor, and the distributor includes a regulating component for regulating the refrigerant amount entering the refrigeration evaporator and the refrigerant amount entering the freezing evaporator; the control device includes:

[0030] An acquisition module configured to obtain a first real-time temperature of a refrigerated compartment and a second real-time temperature of a frozen compartment when the compressor stops; wherein, the refrigeration evaporator is configured to provide cold energy to the refrigerated compartment, and the freezing evaporator is configured to provide cold energy to the frozen compartment;

[0031] The acquisition module obtains a first heat load of the refrigerated compartment and a second heat load of the frozen compartment when the first real-time temperature reaches the refrigeration start point temperature and / or the second real-time temperature reaches the freezing start point temperature;

[0032] A determination module for determining the refrigerant distribution ratio of the distributor and the operation duration of the compressor according to the first heat load and the second heat load;

[0033] A control module controls the regulating component to adjust the refrigerant amount entering the refrigeration evaporator and the refrigerant amount entering the freezing evaporator according to the refrigerant distribution ratio;

[0034] The control module controls the compressor to start up, and after running for the running duration, controls the compressor to shut down.

[0035] In a third aspect, the present application further provides a refrigerator, which includes a controller configured to execute the control method of the refrigeration system as described above.

[0036] In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program is loaded by a processor to execute the steps of the control method of the refrigeration system as described above.

[0037] In the technical solution of the embodiment of the present application, more refrigerant is allocated to the refrigerating evaporator, which can improve the refrigerating capacity of the refrigeration system for the refrigerator compartment under high ambient temperature conditions; on this basis, through the control method of the embodiment of the present application, the refrigeration requirements of both the refrigerator compartment and the freezer compartment are satisfied at the same time; specifically, when the compressor starts and stops, both the refrigerator compartment and the freezer compartment start to warm up. When at least one of them rises to the corresponding start-up point temperature, the first heat load of the refrigerator compartment and the second heat load of the freezer compartment are obtained, so as to determine the distribution ratio of the refrigerant distributed by the distributor and the running duration of the compressor. The adjusting component adjusts the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the refrigerant distribution ratio, so as to distribute the refrigerant amount to adapt to the first heat load of the refrigerator compartment and the second heat load of the freezer compartment, so that after the compressor runs for the running duration, both the freezer compartment and the refrigerator compartment can meet the corresponding refrigeration requirements. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 is a schematic structural diagram of the refrigeration system provided in the embodiment of the present application;

[0040] Figure 2 is a schematic structural diagram of the refrigerator provided in the embodiment of the present application;

[0041] Figure 3 is a schematic structural diagram of the distributor provided in the embodiment of the present application;

[0042] Figure 4 is a schematic flow chart of the refrigeration method of the refrigeration system provided in the embodiment of the present application;

[0043] Figure 5It is another schematic flowchart of the refrigeration method of the refrigeration system provided in the embodiments of the present application;

[0044] Figure 6 It is another schematic flowchart of the refrigeration method of the refrigeration system provided in the embodiments of the present application;

[0045] Figure 7 is Figure 6 The sub-step schematic diagram of step S510 in;

[0046] Figure 8 It is a schematic structural diagram of the control device of the refrigeration system provided in the embodiments of the present application.

[0047] List of reference numerals

[0048] 10 Liquid distributor 50 Freezing evaporator 11 Refrigerant inlet 60 Compressor 12 Cavity 70 Condenser 13 Wall of the device 80 Drier filter 20 First throttling element 110 Refrigerated compartment 21 First pipe interface 120 Freezer compartment 30 Second throttling element 100 Refrigerator 31 Second pipe interface 01 Acquisition module 32 Movable sleeve 02 Control module 40 Refrigerated evaporator 03 Adjustment module Detailed implementation manners

[0049] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0051] In this application, the term "exemplary" is used to mean "serving as an example, instance, or illustration". Any embodiment described as "exemplary" in this application is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the present invention. In the following description, details are set forth for purposes of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be practiced without these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in this application.

[0052] Embodiments of this application provide a control method, device, refrigerator, and computer-readable storage medium for a refrigeration system, which will be described in detail below.

[0053] As Figure 1 shown, embodiments of this application propose a refrigeration system. The refrigeration system includes a compressor 60, a condenser 70, a liquid distributor 10, a refrigerating evaporator 40, and a freezing evaporator 50. The compressor 60, the condenser 70, and the liquid distributor 10 are sequentially connected in communication. The liquid distributor 10 is connected in communication with the refrigerating evaporator 40 and the freezing evaporator 50, and enables the amount of refrigerant distributed to the refrigerating evaporator 40 to be greater than the amount of refrigerant distributed to the freezing evaporator 50. The refrigerating evaporator 40 and the freezing evaporator 50 are connected in communication with the compressor 60. The liquid distributor 10 includes an adjustment assembly for adjusting the amount of refrigerant entering the refrigerating evaporator 40 and the amount of refrigerant entering the freezing evaporator 50.

[0054] In an embodiment, the liquid distributor 10 distributes the refrigerant into the first throttling element 20 and the second throttling element 30 for temperature reduction and pressure reduction, and then flows into the refrigerating evaporator 40 and the freezing evaporator 50 respectively for refrigeration. The first pipe interface 21 of the first throttling element 20 communicating with the liquid distributor 10 is arranged lower than the second pipe interface 31 of the second throttling element 30 communicating with the liquid distributor 10, so that the amount of refrigerant distributed to the refrigerating evaporator 40 can be greater than the amount of refrigerant distributed to the freezing evaporator 50, and more refrigerant is distributed to the refrigerating evaporator 40, improving the refrigerating effect of the refrigeration system under high ambient temperature conditions. In the above embodiment, the first throttling element 20 and the second throttling element 30 can be one of a capillary tube or an expansion valve. For example, the first throttling element 20 and the second throttling element 30 are capillary tubes; that is, the first throttling element 20 is a first capillary tube and the second throttling element 30 is a second capillary tube. For another example, the first throttling element 20 and the second throttling element 30 are expansion valves; for another example, one of the first throttling element 20 and the second throttling element 30 is a capillary tube and the other is an expansion valve.

[0055] In some embodiments, both the first pipe interface 21 and the second pipe interface 31 extend into the cavity 12 of the liquid distributor 10, and the first pipe interface 21 is arranged lower than the second pipe interface 31. The adjusting assembly includes a movable sleeve 32 configured to slide along the extending direction of at least one of the first pipe interface 21 and the second pipe interface 31, and one of the first pipe interface 21 and the second pipe interface 31 is in communication with the inside of the cavity 12 through the movable sleeve 32. In the embodiment, by setting the movable sleeve 32, the height difference between the first pipe interface 21 or the second pipe interface 31 and the refrigerant liquid level can be adjusted, and thus the distribution ratio of the refrigerant can be adjusted. The adjusting assembly further includes a motor and a linear motion mechanism, and the movement of the movable sleeve 32 is provided by the motor. For example, the motor drives the movable sleeve 32 to move through the linear transmission mechanism.

[0056] The refrigeration principle of the refrigeration system provided by the embodiments of the present application is as follows: The compressor 60 compresses the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant enters the condenser 70 through the pipeline. In the condenser 70, the high-temperature and high-pressure gaseous refrigerant is condensed and then enters the liquid distributor 10 (it can also enter the dryer filter 80 first and then enter the liquid distributor 10). Since the first pipe interface 21 is lower than the second pipe interface 31, the pressure at the first pipe interface 21 is greater, so that more refrigerant is distributed to the refrigerating evaporator 40. The refrigerant after passing through the first capillary tube enters the refrigerating evaporator 40, absorbs heat and evaporates in the refrigerating evaporator 40, providing a refrigeration effect for the refrigerating compartment 110. The refrigerant after passing through the second capillary tube enters the freezing evaporator 50, absorbs heat and evaporates in the freezing evaporator 50, providing a refrigeration effect for the freezing compartment 120. The gaseous refrigerant evaporated in the refrigerating evaporator 40 and the freezing evaporator 50 returns to the compressor 60 through the refrigerant branch, completing a refrigeration cycle. According to the actual refrigeration demand, the distribution ratio of the refrigerant can be adjusted by adjusting the adjustment component.

[0057] In some embodiments, as Figure 3 shown, the first pipe interface 21 is provided at the bottom of the wall 13, and the second pipe interface 31 extends into the cavity 12 of the liquid distributor 10. A movable sleeve 32 is sleeved outside the second pipe interface 31. The movable sleeve 32 is configured to slide along the extending direction of the second pipe interface 31, and the second pipe interface 31 is in communication with the inside of the cavity 12 through the movable sleeve 32. In the embodiment, by setting the movable sleeve 32, the height difference between the second pipe interface 31 and the refrigerant liquid level can be adjusted, and thus the distribution ratio of the refrigerant can be adjusted. The adjustment component further includes a motor and a linear motion mechanism. The movement of the movable sleeve 32 is provided by the motor. For example, the motor drives the movable sleeve 32 to move through the linear transmission mechanism.

[0058] In some embodiments, the first pipe interface 21 is provided at the bottom of the wall 13, and the second pipe interface 31 extends into the cavity 12 of the liquid distributor 10. A valve plate is provided at the first pipe interface 21, and the distribution ratio of the refrigerant is adjusted by adjusting the opening degree of the valve plate. The valve plate can be connected to the first pipe interface 21 through a hinge, so that the valve plate can rotate around the hinge. The valve plate can be configured to have multiple angles, thereby adjusting the refrigerant distribution ratio.

[0059] As Figure 2As shown, the refrigeration system is applied to the dual-system refrigerator 100. The dual-system refrigerator 100 is a dual-air-cooled refrigerator 100, and the air-cooled refrigerator 100 includes a refrigerating air blower and a freezing air blower. The installation structures of the refrigerating air blower and the freezing air blower and the corresponding air duct structures are not the key points of improvement in this application, so the structures in the prior art can be adopted. In this embodiment, the refrigerating air blower is configured to supply the cold quantity of the refrigerating evaporator 40 to the refrigerating compartment 110, that is, to drive the air in the refrigerating compartment 110 to exchange heat with the refrigerating evaporator 40, so as to reduce the temperature in the refrigerating compartment 110. The freezing air blower is configured to supply the cold quantity of the freezing evaporator 50 to the freezing compartment 120, that is, to drive the air in the freezing compartment 120 to exchange heat with the freezing evaporator 50, so as to reduce the temperature in the freezing compartment 120.

[0060] In some other embodiments, the refrigerator 100 can also be a direct-cooled refrigerator 100, such as Figure 2 shown, that is, the refrigerating evaporator 40 and the freezing evaporator 50 are respectively fixed on the wall surfaces of the refrigerating compartment 110 and the freezing compartment 120 to cool the refrigerating compartment 110 and the freezing compartment 120 respectively.

[0061] In some other embodiments, the refrigerator 100 can include only the refrigerating air blower, while the freezing compartment 120 is directly cooled. That is, the refrigerating air blower is configured to supply the cold quantity of the refrigerating evaporator 40 to the refrigerating compartment 110, that is, to drive the air in the refrigerating compartment 110 to exchange heat with the refrigerating evaporator 40, so as to reduce the temperature in the refrigerating compartment 110; while the freezing evaporator 50 is fixed on the wall surface of the freezing compartment 120 to cool the freezing compartment 120 respectively.

[0062] In some other embodiments, the refrigerator 100 can include only the freezing air blower, while the refrigerating compartment 110 is directly cooled. That is: the freezing air blower is configured to supply the cold quantity of the freezing evaporator 50 to the freezing compartment 120, that is, to drive the air in the freezing compartment 120 to exchange heat with the freezing evaporator 50, so as to reduce the temperature in the freezing compartment 120. And the refrigerating evaporator 40 is fixed on the wall surface of the refrigerating compartment 110 to cool the refrigerating compartment 110 respectively.

[0063] Such as Figure 3 shown, the distributor 10 includes a wall 13, a refrigerant inlet 11 and a cavity 12 defined by the wall 13. The first pipe interface 21 is provided at the bottom of the wall 13, and the refrigerant inlet 11 is provided at the top of the wall 13. The second pipe interface 31 extends into the cavity 12 and is slidably connected with a movable sleeve 32. The movable sleeve 32 can be driven by a motor through a linear motion mechanism to adjust the refrigerant distribution ratio. Combining the refrigeration system of the above embodiments and as Figure 4 shown, the embodiment of the present application proposes a control method for the refrigeration system. Such as Figure 4As shown, the control method includes:

[0064] S100, when the compressor stops, obtaining the first real-time temperature of the refrigerated compartment and the second real-time temperature of the frozen compartment; wherein, the refrigeration evaporator is configured to provide cooling capacity to the refrigerated compartment, and the freezing evaporator is configured to provide cooling capacity to the frozen compartment;

[0065] S300, when the first real-time temperature reaches the refrigeration startup point temperature and / or the second real-time temperature reaches the freezing startup point temperature, obtaining the first heat load of the refrigerated compartment and the second heat load of the frozen compartment;

[0066] S500, determining the refrigerant distribution ratio of the distributor and the operation duration of the compressor according to the first heat load and the second heat load;

[0067] S600, controlling the regulating component to adjust the refrigerant amount entering the refrigeration evaporator and the refrigerant amount entering the freezing evaporator according to the refrigerant distribution ratio;

[0068] S700, controlling the compressor to start up, and after running for the operation duration, controlling the compressor to stop.

[0069] In the technical solution of the embodiment of the present application, more refrigerant is allocated to the refrigeration evaporator, which can improve the refrigeration capacity of the refrigeration system of the refrigerator under high ambient temperature conditions; on this basis, through the control method of the embodiment of the present application, the refrigeration requirements of both the refrigerated compartment and the frozen compartment are satisfied at the same time; specifically, when the compressor stops and starts, both the refrigerated compartment and the frozen compartment start to warm up. When at least one of them rises to the corresponding startup point temperature, the first heat load of the refrigerated compartment and the second heat load of the frozen compartment are obtained, so as to determine the distribution ratio of the refrigerant distributed by the distributor and the operation duration of the compressor. The regulating component adjusts the refrigerant amount entering the refrigeration evaporator and the refrigerant amount entering the freezing evaporator according to the refrigerant distribution ratio, so as to distribute the refrigerant amount to adapt to the first heat load of the refrigerated compartment and the second heat load of the frozen compartment, so that after the compressor starts up and runs for the operation duration, both the refrigerated compartment and the frozen compartment can meet the corresponding refrigeration requirements.

[0070] It should be noted that in the technical solution of the embodiment of the present application, more refrigerant is allocated to the refrigeration evaporator, which is the initial state set when the refrigerator is in a steady-state operation. This is mainly considered that it is easier for the refrigerator to start refrigerating when the first real-time temperature reaches the refrigeration startup point temperature; and under high ambient temperature, more refrigerant is allocated to the refrigeration evaporator, which is more likely to meet the refrigeration requirements of the refrigeration system.

[0071] In the control method, the refrigerant amount can be redistributed based on the first heat load and the second heat load, so that after the compressor operates for the operation duration, both the refrigerating compartment and the freezing compartment can meet their corresponding refrigeration requirements.

[0072] For example, in an embodiment, when the first real-time temperature reaches the refrigerating startup point temperature and the second real-time temperature simultaneously reaches the freezing startup point temperature, the first heat load at this time is the first set heat load, the second heat load is the second set heat load, and the refrigerant distribution ratio of the liquid distributor is 1:n (the refrigerant amount distributed to the refrigerating evaporator: the refrigerant amount distributed to the freezing evaporator, where n is a positive number less than 1). At this time, the refrigerant amount obtained by the refrigerating evaporator is the refrigerant amount when the adjustment component does not adjust the refrigerant distribution ratio.

[0073] In some embodiments, when the first real-time temperature reaches the refrigerating startup point temperature and the second real-time temperature does not reach the freezing startup point temperature, the first heat load at this time is the first set heat load, and the second heat load is reduced compared to the second set heat load, indicating that the cooling demand of the freezing compartment is relatively reduced. Then, the refrigerant distribution ratio can be adjusted to increase (i.e., n becomes smaller), so that the refrigerant amount of the refrigerating evaporator increases and the refrigerant amount of the freezing evaporator decreases.

[0074] In some embodiments, when the first real-time temperature does not reach the refrigerating startup point temperature and the second real-time temperature reaches the freezing startup point temperature, the first heat load is smaller than the first set heat load, and the second heat load is the second set heat load, indicating that the cooling demand of the freezing compartment is relatively increased. Then, the refrigerant distribution ratio can be adjusted to decrease (i.e., n becomes larger), so that the refrigerant amount of the refrigerating evaporator decreases and the refrigerant amount of the freezing evaporator increases.

[0075] In the above embodiments, when the first real-time temperature reaches the refrigerating startup point temperature and the second real-time temperature simultaneously reaches the freezing startup point temperature, the operation duration of the compressor is T. When the first real-time temperature reaches the refrigerating startup point temperature and the second real-time temperature does not reach the freezing startup point temperature, due to the overall reduction of the heat load, the operation duration of the compressor is shorter compared to when both temperatures reach the startup point simultaneously. When the first real-time temperature does not reach the refrigerating startup point temperature and the second real-time temperature reaches the freezing startup point temperature, due to the overall reduction of the heat load, the operation duration of the compressor is shortened due to the overall reduction of the heat load.

[0076] In the above embodiments, step S600 and step S700 can be carried out synchronously or successively.

[0077] As an alternative implementation of the above embodiment, such as Figure 5As shown, before obtaining the first heat load of the refrigerated compartment and the second heat load of the frozen compartment, the control method includes:

[0078] S210, obtaining the ambient temperature, the refrigerated shutdown point temperature, and the frozen shutdown point temperature;

[0079] S220, determining the first heat load according to the first real-time temperature, the refrigerated shutdown point temperature, and the ambient temperature;

[0080] S230, determining the second heat load according to the second real-time temperature, the frozen shutdown point temperature, and the ambient temperature.

[0081] In this embodiment, in the technical solution of the embodiment of the present application, the first heat load is determined according to the first real-time temperature, the refrigerated shutdown point temperature, and the ambient temperature; the second heat load is determined according to the second real-time temperature, the frozen shutdown point temperature, and the ambient temperature. The first heat load is positively correlated with the temperature difference between the first real-time temperature and the refrigerated shutdown point temperature, and is positively correlated with the ambient temperature. The second heat load is positively correlated with the temperature difference between the second real-time temperature and the frozen shutdown point temperature, and is positively correlated with the ambient temperature. In some embodiments, a performance test is performed on the refrigeration system to determine a formula for calculating the first heat load based on the first real-time temperature, the refrigerated shutdown point temperature, and the ambient temperature, and to determine a formula for calculating the second heat load based on the second real-time temperature, the frozen shutdown point temperature, and the ambient temperature.

[0082] In this embodiment, when the ambient temperature changes, both the first heat load and the second heat load will change, so the refrigerant distribution ratio of the distributor and the operating duration of the compressor will be adjusted synchronously. Specifically, determining the refrigerant distribution ratio of the distributor and the operating duration of the compressor according to the first heat load and the second heat load includes:

[0083] Determining the operating duration of the compressor according to the total value of the first heat load and the second heat load;

[0084] Determining the load ratio according to the first heat load and the second heat load;

[0085] When the first heat load and the second heat load increase compared with the first set heat load and the second set heat load respectively, if the load ratio is less than the set load ratio, the initial refrigerant distribution ratio is adjusted to become smaller; it means that the second heat load increases more, and the frozen evaporator needs to distribute more refrigerant.

[0086] When the first heat load and the second heat load are respectively increased compared with the first set heat load and the second set heat load, if the load ratio is greater than the set load ratio, the initial refrigerant distribution ratio is adjusted to increase. This indicates that the first heat load increases more, and the refrigerating evaporator needs to distribute more refrigerant.

[0087] When the first heat load and the second heat load are respectively decreased compared with the first set heat load and the second set heat load, if the load ratio is less than the set load ratio, the initial refrigerant distribution ratio is adjusted to increase; this indicates that the second heat load decreases less, and the freezing evaporator requires more refrigerant.

[0088] When the first heat load and the second heat load are respectively decreased compared with the first set heat load and the second set heat load, if the load ratio is greater than the set load ratio, the initial refrigerant distribution ratio is adjusted to decrease; this indicates that the first heat load decreases less, and the refrigerating evaporator requires more refrigerant.

[0089] In this embodiment, the set load ratio is the ratio between the first set heat load and the second set heat load at the set ambient temperature; the initial refrigerant distribution ratio is 1:n (the refrigerant amount distributed by the refrigerating evaporator: the refrigerant amount distributed by the freezing evaporator, where n is a positive number less than 1). At this time, the refrigerant amount obtained by the refrigerating evaporator is the refrigerant amount when the adjustment component does not adjust the refrigerant distribution ratio.

[0090] As Figure 6 shown, as an alternative implementation of the above embodiment, the control method further includes:

[0091] S400, obtaining the refrigeration gear;

[0092] The determining the refrigerant distribution ratio of the liquid separator and the operation duration of the compressor according to the first heat load and the second heat load includes:

[0093] S510, determining the operation duration of the compressor according to the refrigeration gear, the first heat load, and the second heat load.

[0094] In the embodiment, different refrigeration gears result in different compressor powers and thus different refrigeration efficiencies. Therefore, the operation duration of the compressor is determined according to the refrigeration gear, the first heat load, and the second heat load, so that the temperatures of the refrigerated compartment and the frozen compartment can reach the required refrigeration temperatures at different refrigeration gears. As an alternative implementation of the above embodiment, the determining the refrigerant distribution ratio of the liquid separator and the operation duration of the compressor according to the refrigeration gear, the first heat load, and the second heat load includes:

[0095] S511, determining the operation speed of the compressor according to the refrigeration gear;

[0096] S512. Determine the operating duration of the compressor according to the first heat load, the second heat load, and the operating speed.

[0097] In this embodiment, the refrigeration gear is adapted to the operating speed of the compressor. For example, the higher the refrigeration gear, the faster the operating speed. In the case of the same first heat load and the second heat load, the operating duration is shortened, which can prevent the refrigerated compartment or the frozen compartment from being overcooled.

[0098] As an alternative embodiment of the above embodiment, the control method further includes: when the first real-time temperature reaches the refrigeration start point temperature and the second real-time temperature reaches the freezing start point temperature simultaneously, control the compressor to operate for a preset duration, and control the regulating component to adjust the refrigerant amounts entering the refrigeration evaporator and the freezing evaporator according to the initial refrigerant distribution ratio. That is, in the embodiment, when the temperatures in the refrigerated compartment and the frozen compartment reach the corresponding start point temperatures respectively, which conforms to the initial setting state of the refrigeration system at this time, the regulating component adjusts the refrigerant amounts entering the refrigeration evaporator and the freezing evaporator according to the initial refrigerant distribution ratio, and there is no need to determine the refrigerant distribution ratio through the first heat load and the second heat load, so that the refrigeration system can be quickly started.

[0099] As an alternative embodiment of the above embodiment, the control method further includes:

[0100] Obtain the operating state of the refrigerator;

[0101] If the operating state is a stable state, then adjust the refrigeration start point temperature and the freezing start point temperature so that when the first real-time temperature reaches the refrigeration start point temperature, the second real-time temperature reaches the freezing start point temperature simultaneously.

[0102] That is, in some embodiments, when the refrigerator is operating in a steady state, the refrigeration start point temperature and the freezing start point temperature can be adjusted so that when the first real-time temperature reaches the refrigeration start point temperature, the second real-time temperature reaches the freezing start point temperature simultaneously, thereby enabling the refrigeration cycle of the refrigeration system.

[0103] As an alternative embodiment of the above embodiment, during the operation of the compressor, the control method further includes:

[0104] Obtain the first real-time heat load of the refrigerated compartment and the second real-time heat load of the frozen compartment;

[0105] Adjust the refrigerant distribution ratio of the liquid separator according to the first real-time heat load, the second real-time heat load, and the operating duration;

[0106] Control the regulating assembly to adjust the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the adjusted refrigerant distribution ratio.

[0107] In this embodiment, by real-time feedback of the first heat load and the second heat load, it is judged whether the temperatures of the refrigerating compartment and the freezing compartment can reach their respective refrigeration requirements synchronously during the operation of the compressor within the operation duration; if within the operation duration, the temperatures of the refrigerating compartment and the freezing compartment cannot reach their respective refrigeration requirements synchronously, the refrigerant distribution ratio can be adjusted in real time to adjust the refrigerant of the refrigerating evaporator and the freezing evaporator. For example, if the ratio of the first real-time heat load to the second real-time heat load becomes larger, the amount required by the refrigerating evaporator needs to be increased; if the ratio of the first real-time heat load to the second real-time heat load becomes smaller, the amount required by the freezing evaporator needs to be increased.

[0108] To better implement the control method of the refrigeration system in the embodiments of the present application, based on the control method of the refrigeration system, an apparatus for controlling a refrigeration system is further provided in the embodiments of the present application, as Figure 8 shown, the apparatus for controlling the refrigeration system includes:

[0109] An acquisition module 01 configured to acquire the first real-time temperature of the refrigerating compartment and the second real-time temperature of the freezing compartment when the compressor stops; wherein, the refrigerating evaporator is configured to provide cooling capacity to the refrigerating compartment, and the freezing evaporator is configured to provide cooling capacity to the freezing compartment;

[0110] The acquisition module 01 acquires the first heat load of the refrigerating compartment and the second heat load of the freezing compartment when the first real-time temperature reaches the refrigerating start point temperature and / or the second real-time temperature reaches the freezing start point temperature;

[0111] A determination module 02 for determining the refrigerant distribution ratio of the liquid separator and the operation duration of the compressor according to the first heat load and the second heat load;

[0112] A control module 03 controls the regulating assembly to adjust the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the refrigerant distribution ratio;

[0113] The control module 03 controls the compressor to start, and after running for the operation duration, controls the compressor to stop.

[0114] The embodiments of the present application also propose a control system of a refrigeration system, including: one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the control method of the refrigeration system as described above.

[0115] Generally, usually, the control system of the refrigeration system includes: at least one processor, at least one memory, and a control program of the control system of the refrigeration system stored on the memory and operable on the processor. The control program of the control system of the refrigeration system is configured to implement the steps of the control method as described above.

[0116] The processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array). The processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the wake state, also known as the CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor may be integrated with a GPU (Graphics Processing Unit), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. The processor may also include an AI (Artificial Intelligence) processor, which is used to process the operations of the control method of the control system of the refrigeration system, so that the control method model of the control system of the refrigeration system can autonomously train and learn to improve efficiency and accuracy.

[0117] The memory may include one or more computer-readable storage media, and the computer-readable storage media may be non-transitory. The memory may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash storage devices. In some embodiments, the non-transitory computer-readable storage media in the memory is used to store at least one instruction, and the at least one instruction is used to be executed by the processor to implement the control method of the refrigeration system provided in the method embodiments of the present application.

[0118] When the compressor stops, obtain the first real-time temperature of the refrigerated compartment and the second real-time temperature of the frozen compartment; wherein, the refrigerated evaporator is configured to provide cooling capacity to the refrigerated compartment, and the frozen evaporator is configured to provide cooling capacity to the frozen compartment;

[0119] When the first real-time temperature reaches the refrigeration start-up point temperature and / or the second real-time temperature reaches the freezing start-up point temperature, obtain the first heat load of the refrigerated compartment and the second heat load of the frozen compartment;

[0120] According to the first heat load and the second heat load, determine the refrigerant distribution ratio of the distributor and the operation duration of the compressor;

[0121] According to the refrigerant distribution ratio, control the regulating component to adjust the refrigerant amount entering the refrigeration evaporator and the refrigerant amount entering the freezing evaporator according to the refrigerant distribution ratio;

[0122] Control the compressor to start up, and after running for the operation duration, control the compressor to shut down.

[0123] As an optional implementation manner of the above embodiment, before obtaining the first heat load of the refrigerated compartment and the second heat load of the frozen compartment, the control method includes:

[0124] Obtain the ambient temperature, the refrigeration shutdown point temperature and the freezing shutdown point temperature;

[0125] According to the first real-time temperature, the refrigeration shutdown point temperature and the ambient temperature, determine the first heat load;

[0126] According to the second real-time temperature, the freezing shutdown point temperature and the ambient temperature, determine the second heat load.

[0127] As an optional implementation manner of the above embodiment, the control method further includes:

[0128] Obtain the refrigeration gear;

[0129] The determining the refrigerant distribution ratio of the distributor and the operation duration of the compressor according to the first heat load and the second heat load includes:

[0130] According to the refrigeration gear, the first heat load and the second heat load, determine the operation duration of the compressor.

[0131] As an optional implementation manner of the above embodiment, determining the refrigerant distribution ratio of the distributor and the operation duration of the compressor according to the refrigeration gear, the first heat load and the second heat load includes:

[0132] S511, according to the refrigeration gear, determine the operating speed of the compressor;

[0133] S512, according to the first heat load, the second heat load and the operating speed, determine the operation duration of the compressor.

[0134] As an alternative implementation of the above embodiment, the control method further includes: when the first real-time temperature reaches the refrigeration start-up point temperature and the second real-time temperature reaches the freezing start-up point temperature at the same time, controlling the compressor to operate for a preset duration, and controlling the adjustment component to adjust the refrigerant amounts flowing into the refrigeration evaporator and the freezing evaporator according to the initial refrigerant distribution ratio.

[0135] As an alternative implementation of the above embodiment, the control method further includes:

[0136] Obtaining the operating state of the refrigerator;

[0137] If the operating state is a stable state, adjusting the refrigeration start-up point temperature and the freezing start-up point temperature so that when the first real-time temperature reaches the refrigeration start-up point temperature, the second real-time temperature reaches the freezing start-up point temperature at the same time.

[0138] As an alternative implementation of the above embodiment, during the operation of the compressor, the control method further includes:

[0139] Obtaining the first real-time heat load of the refrigerating compartment and the second real-time heat load of the freezing compartment;

[0140] Adjusting the refrigerant distribution ratio of the liquid distributor according to the first real-time heat load, the second real-time heat load and the operation duration;

[0141] Controlling the adjustment component to adjust the refrigerant amounts flowing into the refrigeration evaporator and the freezing evaporator according to the adjusted refrigerant distribution ratio.

[0142] The control method, device, refrigerator and computer-readable storage medium of the refrigeration system provided by the embodiments of the present application have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A control method for a refrigeration system, characterized in that: The refrigeration system comprises a compressor, a condenser, a liquid separator, a refrigerated evaporator and a frozen evaporator; the compressor, the condenser and the liquid separator are connected in sequence, the liquid separator is connected to the refrigerated evaporator and the frozen evaporator, and the amount of refrigerant distributed by the refrigerated evaporator is greater than the amount of refrigerant distributed by the frozen evaporator, the refrigerated evaporator and the frozen evaporator are connected to the compressor, the liquid separator comprises a regulating component, and the regulating component is used to regulate the amount of refrigerant entering the refrigerated evaporator and the amount of refrigerant entering the frozen evaporator; The control method comprises: When the compressor is stopped, a first real-time temperature of the refrigerating compartment and a second real-time temperature of the freezing compartment are obtained; wherein the refrigerating evaporator is configured to provide cooling to the refrigerating compartment, and the freezing evaporator is configured to provide cooling to the freezing compartment; When the first real-time temperature reaches a refrigeration start-up point temperature and / or the second real-time temperature reaches a freezing start-up point temperature, obtaining a first heat load of the refrigeration compartment and a second heat load of the freezing compartment; Determining a refrigerant distribution ratio of the liquid distributor and a running time of the compressor according to the first heat load and the second heat load; According to the refrigerant distribution ratio, controlling the regulating component to regulate the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the refrigerant distribution ratio; The compressor is controlled to start up, and after running for the running time, the compressor is controlled to stop.

2. The control method according to claim 1, characterized in that: Before obtaining the first heat load of the refrigerating compartment and the second heat load of the freezing compartment, the control method includes: Obtain the ambient temperature, the refrigeration stop point temperature and the freezing stop point temperature; determining a first heat load according to the first real-time temperature, the refrigeration shutdown point temperature, and the ambient temperature; A second heat load is determined according to the second real-time temperature, the refrigeration shutdown point temperature and the ambient temperature.

3. The control method according to claim 1, characterized in that: The control method further comprises: Get the cooling gear; The step of determining the refrigerant distribution ratio of the liquid distributor and the operating time of the compressor according to the first heat load and the second heat load comprises: The operating time of the compressor is determined according to the cooling gear, the first heat load, and the second heat load.

4. The control method according to claim 3, characterized in that: Determining the refrigerant distribution ratio of the liquid distributor and the operating time of the compressor according to the refrigeration gear, the first heat load, and the second heat load includes: Determining the operating speed of the compressor according to the refrigeration gear; An operating time of the compressor is determined according to the first heat load, the second heat load and the operating speed.

5. The control method according to claim 1, characterized in that: The control method also includes: when the first real-time temperature reaches the refrigeration start-up point temperature, the second real-time temperature reaches the freezing start-up point temperature, then the compressor is controlled to run and run for a preset time, and the regulating component is controlled to adjust the amount of refrigerant entering the refrigeration evaporator and the amount of refrigerant entering the freezing evaporator according to the initial refrigerant distribution ratio.

6. The control method according to claim 5, characterized in that: The control method further comprises: Get the operating status of the refrigerator; If the operating state is a stable state, the refrigeration start-up point temperature and the freezing start-up point temperature are adjusted so that the first real-time temperature reaches the refrigeration start-up point temperature while the second real-time temperature reaches the freezing start-up point temperature.

7. The control method according to claim 1, characterized in that: During the operation of the compressor, the control method further includes: Acquire a first real-time heat load of the refrigerating compartment and a second real-time heat load of the freezing compartment; adjusting the refrigerant distribution ratio of the liquid distributor according to the first real-time heat load, the second real-time heat load and the operation time; The regulating component is controlled to regulate the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the adjusted refrigerant distribution ratio.

8. A control device for a refrigeration system, characterized in that: The refrigeration system comprises a compressor, a condenser, a liquid separator, a refrigerated evaporator and a frozen evaporator; the compressor, the condenser and the liquid separator are connected in sequence, the liquid separator is connected to the refrigerated evaporator and the frozen evaporator, and the amount of refrigerant distributed by the refrigerated evaporator is greater than the amount of refrigerant distributed by the frozen evaporator, the refrigerated evaporator and the frozen evaporator are connected to the compressor, the liquid separator comprises a regulating component, and the regulating component is used to regulate the amount of refrigerant entering the refrigerated evaporator and the amount of refrigerant entering the frozen evaporator; The control device comprises: an acquisition module, configured to acquire a first real-time temperature of the refrigerating compartment and a second real-time temperature of the freezing compartment when the compressor is stopped; wherein the refrigerating evaporator is configured to provide cooling to the refrigerating compartment, and the freezing evaporator is configured to provide cooling to the freezing compartment; The acquisition module acquires a first heat load of the refrigerating compartment and a second heat load of the freezing compartment when the first real-time temperature reaches a refrigerating start-up point temperature and / or the second real-time temperature reaches a freezing start-up point temperature; a determination module, configured to determine a refrigerant distribution ratio of the liquid distributor and a running time of the compressor according to the first heat load and the second heat load; A control module controls the regulating component to regulate the amount of refrigerant entering the refrigerating evaporator and the amount of refrigerant entering the freezing evaporator according to the refrigerant distribution ratio; The control module controls the compressor to start up, and after running for the running time, controls the compressor to stop.

9. A refrigerator, characterized in that: The refrigerator includes a controller configured to execute to implement the control method of the refrigeration system according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps of the control method of a refrigeration system according to any one of claims 1 to 7.

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