Control methods and devices for refrigeration systems, and computer-readable storage media

Abstract

This disclosure relates to a control method and apparatus for a refrigeration system, and a computer-readable storage medium, and relates to the field of air conditioning technology. The control method for the refrigeration system includes: measuring pressure information inside the refrigeration system, wherein the refrigeration system includes a compressor; determining a first duration for heating a working medium inside the compressor based on the pressure information; and, before starting the refrigeration system, causing a heating device to heat the working medium inside the compressor for the first duration.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning technology, and in particular to control methods and devices for refrigeration systems, and computer-readable storage media. Background Technology

[0002] When the outdoor unit of an air conditioner is operating at extremely low outdoor temperatures (e.g., -40°C), the refrigerant within the system will liquefy due to the low temperature once the system is completely shut down. The liquefied refrigerant will mix with the lubricating oil in the compressor, forming a miscible state. In this state, when the air conditioning system restarts, the liquefied refrigerant will carry the lubricating oil out of the compressor and into the refrigeration cycle system.

[0003] This situation can lead to a lack of necessary lubrication inside the compressor, increasing the risk of wear and tear and affecting the system's efficiency. Summary of the Invention

[0004] According to a first aspect of this disclosure, a method for controlling a refrigeration system is provided, comprising:

[0005] Measure the pressure information inside the refrigeration system, wherein the refrigeration system includes a compressor;

[0006] Based on the pressure information, a first duration for heating the working medium inside the compressor is determined;

[0007] Before the refrigeration system is started, the heating device heats the working medium inside the compressor for the first duration.

[0008] In some embodiments, determining a first duration for heating the working medium within the compressor based on the pressure information includes:

[0009] The current temperature of the working medium is determined based on the second duration during which the refrigeration system has stopped operating;

[0010] The first duration is determined based on the pressure information and the current temperature of the working medium.

[0011] In some embodiments, determining the current temperature of the working medium based on a second duration during which the refrigeration system has stopped operating includes:

[0012] If the second duration does not exceed the duration threshold, the temperature of the working medium when the refrigeration system stops operating is determined as the current temperature of the working medium.

[0013] In some embodiments, determining the current temperature of the working medium based on a second duration during which the refrigeration system has stopped operating includes:

[0014] If the second duration exceeds the duration threshold, the current ambient temperature is determined as the current temperature of the working medium.

[0015] In some embodiments, determining the first duration for heating the working medium inside the compressor based on the pressure information includes:

[0016] Based on the pressure information, the superheat of the working medium is determined;

[0017] The target temperature of the working medium is determined based on the superheat of the working medium.

[0018] The first duration is determined based on the current temperature of the working medium and the target temperature.

[0019] In some embodiments, determining the first duration based on the current temperature of the working medium and the target temperature includes:

[0020] Based on the current temperature and target temperature of the working medium, the amount of lubricating oil injected, and the specific heat capacity of the lubricating oil, determine the amount of heat required to heat the working medium to the target temperature.

[0021] The heat loss is determined based on the current temperature of the working medium, the temperature measured by the exhaust temperature sensor, the convective heat transfer coefficient of the compressor surface, and the surface area of ​​the compressor.

[0022] Determine the sum of the required heat and the heat loss, and then determine the first duration.

[0023] In some embodiments, the refrigeration system further includes an evaporator, and the measurement of pressure information inside the refrigeration system includes:

[0024] The pressure information inside the refrigeration system is measured using a pressure sensor, wherein the pressure sensor is located at the outlet of the evaporator.

[0025] According to a second aspect of this disclosure, a control device for a refrigeration system is provided, comprising:

[0026] A measurement module is configured to measure pressure information inside a refrigeration system, wherein the refrigeration system includes a compressor;

[0027] The determining module is configured to determine a first duration for heating the working medium inside the compressor based on the pressure information;

[0028] The heating module is configured to heat the working medium inside the compressor for the first duration before the refrigeration system is started.

[0029] According to a third aspect of this disclosure, a control device for a refrigeration system is provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute a control method for the refrigeration system according to some embodiments of this disclosure based on instructions stored in the memory.

[0030] According to a fourth aspect of this disclosure, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement a control method for a refrigeration system according to some embodiments of this disclosure.

[0031] According to a fifth aspect of this disclosure, a computer program product is provided, including computer program instructions that, when executed by a processor, implement a control method for a refrigeration system according to some embodiments of this disclosure.

[0032] According to a sixth aspect of this disclosure, a refrigeration system is provided, comprising:

[0033] Control device for a refrigeration system according to some embodiments of the present disclosure;

[0034] compressor;

[0035] Pressure sensor; and

[0036] Heating device.

[0037] According to a seventh aspect of this disclosure, an air conditioning system is provided, comprising:

[0038] Refrigeration systems according to some embodiments of this disclosure. Attached Figure Description

[0039] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0040] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description.

[0041] in:

[0042] Figure 1 A flowchart illustrating a control method for a refrigeration system according to some embodiments of the present disclosure;

[0043] Figure 2 A schematic diagram of a refrigeration system according to some embodiments of the present disclosure is shown;

[0044] Figure 3 A block diagram of a control device for a refrigeration system according to some embodiments of the present disclosure is shown;

[0045] Figure 4A block diagram of a control device for a refrigeration system according to other embodiments of the present disclosure is shown;

[0046] Figure 5 A block diagram of a computer system for implementing some embodiments of the present disclosure is shown;

[0047] Figure 6 A block diagram is shown for implementing some embodiments of the present disclosure of a refrigeration system;

[0048] Figure 7 A block diagram is shown for an air conditioning system used to implement some embodiments of the present disclosure. Detailed Implementation

[0049] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0050] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0051] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0052] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0053] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0054] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0055] When the system shuts down, the refrigerant liquefies at low temperatures and mixes with the lubricating oil in the compressor. When the system restarts, this mixture is carried out of the compressor by the refrigerant and enters the refrigeration cycle. This not only reduces the amount of lubricating oil in the compressor, leading to increased compressor wear, but also affects the normal circulation of the refrigerant in the system, thus reducing refrigeration efficiency.

[0056] Whether the refrigeration system is restarted after a complete shutdown or after running for a period of time, refrigerant liquefaction may occur inside the system. This phenomenon not only leads to a decrease in the cooling efficiency of the air conditioning system but also increases the overall energy consumption of the system.

[0057] In related technologies, air conditioning systems are equipped with gas-liquid separators and oil-liquid separators. The gas-liquid separator separates the liquid refrigerant from the gaseous refrigerant, ensuring that the refrigerant entering the compressor is primarily gaseous, thereby reducing the impact of liquid refrigerant on the compressor. The oil-liquid separator recovers the lubricating oil carried away by the refrigerant and returns it to the compressor to maintain sufficient lubricating oil levels within the compressor.

[0058] While gas-liquid separators and oil separators alleviate the problems caused by refrigerant liquefaction to some extent, at extremely low ambient temperatures, parts of the refrigeration system may still be below the refrigerant's boiling point (i.e., the minimum temperature required for the refrigerant to change from a liquid to a gaseous state). When this occurs, the refrigerant will liquefy inappropriately, leading to increased compressor wear regardless of whether a gas-liquid or oil separator is used. This will affect the normal circulation of the refrigerant in the system and reduce refrigeration efficiency.

[0059] This disclosure presents a control method and apparatus for a refrigeration system, as well as a computer-readable storage medium, which helps maintain the system's operating efficiency.

[0060] Figure 1 A flowchart illustrating a control method for a refrigeration system according to some embodiments of the present disclosure is shown.

[0061] like Figure 1 As shown, the control method for the refrigeration system includes steps S1-S3. In some embodiments, the control method for the refrigeration system is executed by the control device of the refrigeration system.

[0062] In step S1, the pressure information inside the refrigeration system is measured, wherein the refrigeration system includes a compressor.

[0063] For example, by measuring the pressure inside the refrigeration system, the saturation temperature and superheat of the working medium at that pressure can be obtained. The working medium may include, for example, refrigerant (i.e., cooling medium) and lubricating oil. Superheat refers to the difference between the actual temperature of the working medium at the evaporator outlet and its saturation temperature (i.e., the temperature at which it begins to boil under the same pressure). Superheat is an important parameter reflecting whether the working medium has completely evaporated in the evaporator.

[0064] Figure 2 A schematic diagram of a refrigeration system according to some embodiments of the present disclosure is shown.

[0065] like Figure 2As shown, in some embodiments, the refrigeration system further includes an evaporator, and measuring the pressure information inside the refrigeration system includes: measuring the pressure information inside the refrigeration system using a pressure sensor, wherein the pressure sensor is located at the evaporator outlet.

[0066] Compared to other locations, by placing the pressure sensor at the evaporator outlet, the measured pressure value can more accurately reflect the state of the refrigerant at the evaporator outlet. For example, it can more accurately calculate the superheat, reduce measurement errors caused by flow pressure drop, and thus more accurately calculate the heating time.

[0067] By calculating the heating time more accurately, the risk of overheating is reduced, thereby reducing system energy consumption and start-up time. On the other hand, the risk of insufficient heating is also reduced, allowing the refrigerant to fully vaporize and reducing the risk of lubricating oil being carried out of the compressor by the refrigerant, thus helping to maintain the system's cooling efficiency.

[0068] In some embodiments, before step S2, it is determined whether to use a heating device to heat the working medium inside the compressor based on the pressure information. For example, the temperature of the refrigerant before the air conditioner is started can be determined by observing the reading of the pressure sensor, and whether it is in a liquid or gaseous state. If it is in a liquid state, the intervention of the heating device is required to heat the system.

[0069] The gas-oil separator can also be used to determine if lubricating oil is being carried out of the compressor. If lubricating oil is detected leaving the compressor, a heating device (such as a heating belt) can be activated for heating. However, relying solely on the gas-oil separator makes it difficult to obtain the actual pressure of the refrigerant within the system, thus making it difficult to control the heating time.

[0070] In step S2, the first duration for heating the working medium inside the compressor is determined based on the pressure information.

[0071] For example, whether after a prolonged or short system shutdown, the system pressure is used to determine if liquefaction exists within the system, and the power and heating duration of the compressor's external heating element are adjusted accordingly to ensure smooth system startup in low-temperature environments. Alternatively, the system pressure and exhaust temperature sensor readings can be used together to determine if liquefaction exists within the system, and the power and heating duration of the compressor's external heating element can be adjusted accordingly.

[0072] In some embodiments, determining a first duration for heating the working medium inside the compressor based on pressure information includes: determining the current temperature of the working medium based on a second duration during which the refrigeration system stops operating; and determining the first duration based on the pressure information and the current temperature of the working medium.

[0073] For example, timing the duration of refrigeration system shutdown. The state of the working medium differs depending on the shutdown duration. If the system shutdown time is short, the temperature of the refrigerant and lubricating oil may not drop significantly. In this case, a shorter heating time is used to quickly restore the system to normal operating conditions, reducing startup time and energy consumption.

[0074] If the system is shut down for an extended period, the refrigerant and lubricating oil temperatures will have dropped to a low level. In this case, a longer heating time is required to ensure the refrigerant vaporizes more fully, guaranteeing that the refrigerant state meets the requirements of the refrigeration cycle during startup, reducing mechanical wear during startup, and protecting the compressor.

[0075] By differentiating downtime, different situations can be handled differently, and the first duration under different circumstances can be calculated more accurately.

[0076] In some instances, the current temperature of the working medium is determined based on a second duration during which the refrigeration system has stopped operating, including: if the second duration does not exceed a duration threshold, determining the temperature of the working medium when the refrigeration system has stopped operating as the current temperature of the working medium.

[0077] For example, if the downtime is short, record the compressor's discharge temperature after the last shutdown as the current temperature T of the working medium. out .

[0078] Because the downtime is short and the temperature change of the working medium is minimal, the temperature at the time of shutdown can be directly used as the current temperature, avoiding unnecessary heating time. This allows the system to start up and enter normal operating condition more quickly.

[0079] In some embodiments, determining the current temperature of the working medium based on a second duration during which the refrigeration system has stopped operating includes: if the second duration exceeds a duration threshold, determining the current ambient temperature as the current temperature of the working medium.

[0080] For example, if the downtime is long, the ambient temperature (e.g., room temperature) can be used as the current temperature T of the working medium. out .

[0081] When a system has been shut down for an extended period, the compressor's discharge temperature gradually drops to match the ambient temperature. If the ambient temperature is low at this time, the refrigerant temperature is typically below its saturation temperature, meaning the refrigerant is in a subcooled state. Starting the system under such conditions would cause the refrigerant to leave the compressor in liquid form, posing a risk of carrying lubricating oil with it. By using the current ambient temperature as the current temperature of the working medium, the system is given sufficient warming time before startup, allowing the refrigerant to fully vaporize, reducing the risk of lubricating oil being carried away by the refrigerant, and protecting the compressor.

[0082] In some embodiments, determining a first duration for heating the working medium inside the compressor based on pressure information includes: determining the superheat of the working medium based on pressure information; determining a target temperature of the working medium based on the superheat of the working medium; and determining the first duration based on the current temperature and the target temperature of the working medium.

[0083] For example, before restarting the system after a period of downtime, measure the internal pressure P of the system at that time. S Based on the pressure-temperature diagram, the working medium at pressure P can be determined. S The saturation temperature T below S Based on the temperature T of the working medium after it is heated. S and pressure P S Determine the superheat T of the working medium. O According to T S and T O By summing the values ​​of T and T, we can calculate the target temperature T that the refrigerant and compressor lubricating oil need to be heated. Set .

[0084] Superheat is the value by which the working medium, after heating, exceeds its saturation temperature corresponding to its saturation pressure. Superheat is a key indicator of whether the refrigerant has completely vaporized at the evaporator outlet. Insufficient superheat indicates the presence of some liquid refrigerant. If liquid refrigerant enters the compressor, it will damage the compressor.

[0085] By accurately determining the superheat based on pressure information, and then determining the target temperature based on the superheat, more accurate superheat control is achieved. This ensures that the refrigerant has sufficient superheat when leaving the compressor, preventing the refrigerant from entering the compressor in liquid form, thereby protecting the compressor and extending the service life of the refrigeration system.

[0086] In some embodiments, determining a first duration based on the current temperature and target temperature of the working medium includes: determining the amount of heat required to heat the working medium to the target temperature based on the current temperature and target temperature of the working medium, the amount of lubricating oil injected, and the specific heat capacity of the lubricating oil; determining the heat loss based on the current temperature of the working medium, the temperature measured by the exhaust temperature sensor, the convective heat transfer coefficient of the compressor surface, and the surface area of ​​the compressor; and determining the sum of the required heat and the heat loss to determine the first duration.

[0087] For example, record the amount of lubricating oil (m) injected during system assembly. Specific heat capacity is the isobaric specific heat capacity, which corresponds one-to-one with pressure, based on pressure P. S It can also determine the specific heat capacity at constant pressure and C of the lubricating oil at this moment. P (During the heating process, it is assumed that the specific heat capacity is constant, and conservative calculations are performed.)

[0088] Calculate the amount of heat required to heat the working medium to the target temperature based on the following heat absorption formula for an object.

[0089] Q = C P m(T Set -T out (1)

[0090] Where Q represents the amount of heat required for the lubricating oil in the system, and T represents the amount of heat required during long-term shutdown. out For ambient temperature, under short-term shutdown conditions, T out This is the exhaust temperature when the machine is shut down.

[0091] Meanwhile, during the heating process, there is also a convective heat transfer process with the environment, and the heat loss calculation formula is as follows.

[0092] Q loss =HA(T) OIL -T out (2)

[0093] Where H is the convective heat transfer coefficient of the compressor surface, and A is the surface area of ​​the compressor. Under long-term shutdown conditions, T out For ambient temperature, under short-term shutdown conditions, T out T represents the exhaust temperature when the machine is shut down. OIL T represents the oil temperature during the heating process. OIL For example, the temperature was measured by an exhaust temperature sensor when the refrigeration system was working normally.

[0094] The total heat Q provided by the heating device total The calculation is as follows.

[0095] Q total =Q+Q loss (3)

[0096] Given the power P of the heating device, the heating time t of the heating device can be calculated according to the following formula.

[0097] Q total =Pt (4)

[0098] After obtaining the heating time t, based on t and Q loss Calculate the heat loss P caused by convective heat transfer between the system and the external environment per unit time. loss For the same type of refrigeration system, P can also be used subsequently. loss Calculate heat loss Q loss This improves computational efficiency.

[0099] By comprehensively considering both the heat loss from environmental heat exchange and the heat that the working medium itself needs to absorb, the actual heating energy required can be calculated more accurately, thus allowing for a more precise calculation of the heating time. Because the heat loss from environmental heat exchange is taken into account, situations where insufficient heat absorption by the working medium or incomplete vaporization due to environmental heat exchange can be reduced, thereby maintaining the system's operating efficiency.

[0100] According to some embodiments of this disclosure, the pressure of the refrigeration system is measured before startup, and a heating device is added. Based on the pressure information inside the refrigeration system, a first duration for heating the working medium inside the compressor is determined. Before the refrigeration system is started, the heating device heats the working medium inside the compressor for a first duration.

[0101] By adding a heating device to heat the compressor before it starts, the refrigerant is fully vaporized, reducing the presence of liquid refrigerant inside the system during startup and reducing the risk of the refrigerant carrying compressor lubricating oil into the system when starting in a low-temperature environment.

[0102] At the same time, by controlling the heating time more accurately based on the pressure information, the risk of overheating is reduced, thereby reducing the system's energy consumption and start-up time. On the other hand, the risk of insufficient heating is also reduced, allowing the refrigerant to fully vaporize and reducing the risk of lubricating oil being carried out of the compressor by the refrigerant, thus helping to maintain the system's refrigeration efficiency.

[0103] Figure 3 A block diagram of a control device for a refrigeration system according to some embodiments of the present disclosure is shown.

[0104] like Figure 3 As shown, the control device 3 of the refrigeration system includes a measurement module 31, a determination module 32, and a heating module 33.

[0105] Measurement module 31 is configured to measure pressure information inside a refrigeration system, wherein the refrigeration system includes a compressor, for example, performing... Figure 1 Step S1 is shown.

[0106] The determining module 32 is configured to determine a first duration for heating the working medium inside the compressor based on the pressure information, for example, by performing... Figure 1 Step S2 is shown.

[0107] Heating module 33 is configured to heat the working medium inside the compressor for the first duration before the refrigeration system is started, for example, by performing... Figure 1 Step S3 is shown.

[0108] In some embodiments, the determining module 32 is further configured to: determine the current temperature of the working medium based on a second duration during which the refrigeration system stops operating; and determine the first duration based on the pressure information and the current temperature of the working medium.

[0109] In some embodiments, the determining module 32 is further configured to: determine the current temperature of the working medium based on a second duration during which the refrigeration system stops operating, including: if the second duration does not exceed a duration threshold, determining the temperature of the working medium when the refrigeration system stops operating as the current temperature of the working medium.

[0110] In some embodiments, the determining module 32 is further configured to: determine the current ambient temperature as the current temperature of the working medium if the second duration exceeds a duration threshold.

[0111] In some embodiments, the determining module 32 is further configured to: determine the superheat of the working medium based on the pressure information; determine the target temperature of the working medium based on the superheat of the working medium; and determine the first duration based on the current temperature of the working medium and the target temperature.

[0112] In some embodiments, the determining module 32 is further configured to: determine the amount of heat required to heat the working medium to the target temperature based on the current temperature and the target temperature of the working medium, the amount of lubricating oil injected, and the specific heat capacity of the lubricating oil; determine the heat loss based on the current temperature of the working medium and the temperature measured by the exhaust temperature sensor, the convective heat transfer coefficient of the compressor surface, and the surface area of ​​the compressor; and determine the first duration by determining the sum of the required heat and the heat loss.

[0113] In some embodiments, the measurement module 31 is further configured to: measure the pressure information inside the refrigeration system using a pressure sensor, wherein the pressure sensor is located at the evaporator outlet.

[0114] Figure 4 A block diagram of a control device for a refrigeration system according to other embodiments of the present disclosure is shown.

[0115] like Figure 4 As shown, the control device 4 of the refrigeration system includes a memory 41 and a processor 42 coupled to the memory 41. The memory 41 is used to store instructions for executing control methods of the refrigeration system. The processor 42 is configured to execute control methods of the refrigeration system in any of the embodiments of this disclosure based on the instructions stored in the memory 41.

[0116] Figure 5A block diagram of a computer system for implementing some embodiments of the present disclosure is shown.

[0117] like Figure 5 As shown, the computer system 50 can be represented in the form of a general computing device. The computer system 50 includes a memory 510, a processor 520, and a bus 500 connecting different system components.

[0118] The memory 510 may include, for example, system memory, non-volatile storage media, etc. The system memory may store, for example, an operating system, application programs, a boot loader, and other programs. The system memory may include volatile storage media, such as random access memory (RAM) and / or cache memory. The non-volatile storage media may store, for example, instructions for executing the control methods of the cooling system in any of the embodiments of this disclosure. Non-volatile storage media include, but are not limited to, disk storage, optical storage, flash memory, etc.

[0119] The processor 520 can be implemented using a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete hardware components such as discrete gates or transistors. Accordingly, each module, such as the decision module and the determination module, can be implemented by executing instructions in the central processing unit (CPU) memory to perform the corresponding steps, or by implementing dedicated circuitry to perform the corresponding steps.

[0120] Bus 500 can use any of the various bus architectures. For example, bus architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MCA) bus, and Peripheral Component Interconnect (PCI) bus.

[0121] The computer system 50 may also include an input / output interface 530, a network interface 540, and a storage interface 550. These interfaces 530, 540, and 550, as well as the memory 510 and processor 520, can be connected via a bus 500. The input / output interface 530 provides a connection interface for input / output devices such as a monitor, mouse, and keyboard. The network interface 540 provides a connection interface for various networked devices. The storage interface 550 provides a connection interface for external storage devices such as floppy disks, USB flash drives, and SD cards.

[0122] Various aspects of this disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus, and computer program products according to embodiments of this disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations thereof, can be implemented by computer-readable program instructions.

[0123] These computer-readable program instructions are provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable device to produce a machine, such that execution of the instructions by the processor produces means for implementing the functions specified in one or more boxes of the flowchart and / or block diagram.

[0124] These computer-readable program instructions are also readablely stored in a computer-readable storage medium. These instructions cause a computer to work in a particular manner to produce an article of manufacture, including instructions that implement the functions specified in one or more boxes in a flowchart and / or block diagram.

[0125] Figure 6 A block diagram is shown for implementing some embodiments of the present disclosure of a refrigeration system.

[0126] like Figure 6 As shown, the refrigeration system 600 includes a control device 3; a compressor 7; a pressure sensor 8; and a heating device 9.

[0127] Figure 7 A block diagram is shown for an air conditioning system used to implement some embodiments of the present disclosure.

[0128] like Figure 7 As shown, the air conditioning system 1000 includes: a refrigeration system 600.

[0129] This disclosure may take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects.

[0130] The control method and apparatus for the refrigeration system and the computer-readable storage medium in the above embodiments help maintain the system's operating efficiency.

[0131] The control method and apparatus for the refrigeration system according to this disclosure, as well as the computer-readable storage medium, have been described in detail above. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

Claims

1. A control method for a refrigeration system, comprising: Measure the pressure information inside the refrigeration system, wherein the refrigeration system includes a compressor; Determining a first duration for heating the working medium inside the compressor based on the pressure information includes: determining the superheat of the working medium based on the pressure information; determining the target temperature of the working medium based on the superheat of the working medium; and determining the first duration based on the current temperature of the working medium and the target temperature. Before the refrigeration system is started, the heating device heats the working medium inside the compressor for the first duration.

2. The control method for the refrigeration system according to claim 1, wherein, Determining the first duration of heating the working medium inside the compressor based on the pressure information includes: The current temperature of the working medium is determined based on the second duration during which the refrigeration system has stopped operating.

3. The control method for the refrigeration system according to claim 2, wherein, Determining the current temperature of the working medium based on the second duration during which the refrigeration system has stopped operating includes: If the second duration does not exceed the duration threshold, the temperature of the working medium when the refrigeration system stops operating is determined as the current temperature of the working medium.

4. The control method for the refrigeration system according to claim 2, wherein, Determining the current temperature of the working medium based on the second duration during which the refrigeration system has stopped operating includes: If the second duration exceeds the duration threshold, the current ambient temperature is determined as the current temperature of the working medium.

5. The control method for the refrigeration system according to claim 1, wherein, Determining the first duration based on the current temperature of the working medium and the target temperature includes: Based on the current temperature and target temperature of the working medium, the amount of lubricating oil injected, and the specific heat capacity of the lubricating oil, determine the amount of heat required to heat the working medium to the target temperature; The heat loss is determined based on the current temperature of the working medium and the temperature measured by the exhaust temperature sensor, the convective heat transfer coefficient of the compressor surface, and the surface area of ​​the compressor. Determine the sum of the required heat and the heat loss, and then determine the first duration.

6. The control method for the refrigeration system according to any one of claims 1 to 5, wherein, The refrigeration system also includes an evaporator, and the pressure information measured inside the refrigeration system includes: The pressure information inside the refrigeration system is measured using a pressure sensor, wherein the pressure sensor is located at the outlet of the evaporator.

7. A control device for a refrigeration system, comprising: A measurement module is configured to measure pressure information inside a refrigeration system, wherein the refrigeration system includes a compressor; The determining module is configured to determine a first duration for heating the working medium inside the compressor based on the pressure information, including: determining the superheat of the working medium based on the pressure information; determining the target temperature of the working medium based on the superheat of the working medium; and determining the first duration based on the current temperature of the working medium and the target temperature. The heating module is configured to heat the working medium inside the compressor for the first duration before the refrigeration system is started.

8. A control device for a refrigeration system, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the control method of the refrigeration system according to any one of claims 1 to 6 based on instructions stored in the memory.

9. A computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the control method of the refrigeration system according to any one of claims 1 to 6.

10. A computer program product comprising computer program instructions that, when executed by a processor, implement the control method of the refrigeration system according to any one of claims 1 to 6.

11. A refrigeration system, comprising: Control device for the refrigeration system according to claim 7 or 8; compressor; Pressure sensor; as well as Heating device.

12. An air conditioning system, comprising: The refrigeration system according to claim 11.

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