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

Abstract

The invention relates to a control method and device of a refrigerating system and a computer readable storage medium, and relates to the technical field of air conditioners. The control method of the refrigerating system comprises the steps that pressure intensity information in the refrigerating system is measured, and the refrigerating system comprises a compressor; according to the pressure intensity information, first duration for heating a working medium in the compressor is determined; and before the refrigeration system is started, the heating device heats the working medium in the compressor for the first duration.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and in particular to a control method and device for a refrigeration system, and a computer-readable storage medium. Background Art

[0002] When the air conditioner outdoor unit is running under extremely low outdoor temperature conditions (e.g. -40°C), once the system is completely shut down, the refrigerant in the system will liquefy due to the low temperature. The liquefied refrigerant will mix with the lubricating oil in the compressor to form a miscible state. In this state, when the air conditioning system is started again, the liquefied refrigerant will bring the lubricating oil out of the compressor and enter the refrigeration cycle system.

[0003] This situation will lead to a lack of necessary lubrication inside the compressor, which will increase the risk of wear and affect the efficiency of the system. Summary of the invention

[0004] According to a first aspect of the present disclosure, a control method for a refrigeration system is provided, comprising:

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

[0006] Determining a first duration for heating the working medium in the compressor according to the pressure information;

[0007] Before the refrigeration system is started, the heating device is enabled to heat the working medium in the compressor for the first time period.

[0008] In some embodiments, determining a first duration for heating the working medium in the compressor according to the pressure information includes:

[0009] determining a current temperature of the working medium according to a second duration of time during which the refrigeration system stops operating;

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

[0011] In some embodiments, determining the current temperature of the working medium according to the second duration of the refrigeration system stopping operation includes:

[0012] When the second time period does not exceed a time period 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 according to the second duration of the refrigeration system stopping operation includes:

[0014] When the second time period exceeds a time period threshold, the current ambient temperature is determined as the current temperature of the working medium.

[0015] In some embodiments, determining a first duration for heating the working medium in the compressor according to the pressure information includes:

[0016] Determining the superheat of the working medium according to the pressure information;

[0017] Determining a target temperature of the working medium according to the superheat of the working medium;

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

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

[0020] Determining the amount of heat required to heat the working medium to the target temperature according to the current temperature and the target temperature of the working medium, the injection amount of the lubricating oil, and the specific heat capacity of the lubricating oil;

[0021] determining heat loss according to the current temperature of the working medium and the temperature measured by the exhaust temperature sensor, the convection heat transfer coefficient of the compressor surface, and the surface area of ​​the compressor;

[0022] The sum of the required heat and the heat loss is determined to determine the first duration.

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

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

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

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

[0027] a determination module configured to determine a first duration for heating the working medium in the compressor according to the pressure information;

[0028] The heating module is configured to enable the heating device to heat the working medium in the compressor for the first time period before the refrigeration system is started.

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

[0030] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the instructions are executed by a processor, a control method for a refrigeration system according to some embodiments of the present disclosure is implemented.

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

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

[0033] A 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 the present disclosure, there is provided an air conditioning system, comprising:

[0038] A refrigeration system according to some embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0040] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0041] Figure 1 A flow chart showing a method for controlling a refrigeration system according to some embodiments of the present disclosure;

[0042] Figure 2 A schematic diagram showing a refrigeration system according to some embodiments of the present disclosure;

[0043] Figure 3 A block diagram showing a control device for a refrigeration system according to some embodiments of the present disclosure;

[0044] Figure 4 A block diagram showing a control device for a refrigeration system according to other embodiments of the present disclosure;

[0045] Figure 5 A block diagram showing a computer system for implementing some embodiments of the present disclosure;

[0046] Figure 6 A block diagram of a refrigeration system for implementing some embodiments of the present disclosure is shown;

[0047] Figure 7 A block diagram of an air conditioning system for implementing some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0048] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0049] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0051] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0052] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0053] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0054] When the system is shut down, the refrigerant will liquefy in a low temperature environment and mix with the lubricating oil in the compressor. When the system is restarted, this mixture will be carried out of the compressor by the refrigerant and enter the refrigeration cycle system. This not only reduces the amount of lubricating oil in the compressor, causing increased wear of the compressor, but also affects the normal circulation of the refrigerant in the system, thereby reducing the refrigeration efficiency.

[0055] Whether the refrigeration system is restarted after a complete shutdown or restarted after running for a period of time, the refrigerant may liquefy inside the system. This phenomenon will not only reduce the refrigeration efficiency of the air conditioning system, but also increase the overall energy consumption of the system.

[0056] In the related art, the air conditioning system is equipped with a gas-liquid separator and an oil-liquid separator. The gas-liquid separator separates the liquid refrigerant from the gaseous refrigerant, so that the refrigerant entering the compressor is mainly in the gaseous state, thereby reducing the impact of the liquid refrigerant on the compressor. The oil-liquid separator can recover the lubricating oil carried by the refrigerant and return it to the compressor to keep the lubricating oil in the compressor sufficient.

[0057] Although gas-liquid separators and oil-liquid separators can alleviate the problems caused by refrigerant liquefaction to a certain extent, at extremely low ambient temperatures, some structures of the refrigeration system will still be lower than the boiling point of the refrigerant (i.e., the minimum temperature required for the refrigerant to change from liquid to gas). When this happens, the refrigerant will be improperly liquefied, and whether or not a gas-liquid separator or oil-liquid separator is used, it will still cause increased wear on the compressor, affect the normal circulation of the refrigerant in the system, and reduce refrigeration efficiency.

[0058] The present disclosure provides a control method and device for a refrigeration system, and a computer-readable storage medium, which are helpful to maintain the working efficiency of the system.

[0059] Figure 1 A flow chart showing a method for controlling a refrigeration system according to some embodiments of the present disclosure is shown.

[0060] like Figure 1 As shown, the control method of the refrigeration system includes steps S1 to S3. In some embodiments, the control method of the refrigeration system is executed by a control device of the refrigeration system.

[0061] In step S1 , pressure information inside a refrigeration system is measured, wherein the refrigeration system includes a compressor.

[0062] For example, by measuring the pressure information inside the refrigeration system, the saturation temperature and superheat of the working medium under the pressure are obtained. The working medium includes, for example, refrigerant (i.e., coolant) and lubricating oil. Superheat refers to the difference between the actual temperature of the working medium at the outlet of the evaporator and its saturation temperature (i.e., the temperature at which it starts to boil under the same pressure). Superheat is an important parameter that reflects whether the working medium is completely evaporated in the evaporator.

[0063] Figure 2 A schematic diagram of a refrigeration system according to some embodiments of the present disclosure is shown.

[0064] like Figure 2 As 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 outlet of the evaporator.

[0065] Compared with other positions, by setting 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 and reduce the measurement error caused by the flow pressure drop, thereby more accurately calculating the heating time.

[0066] By calculating the heating time more accurately, on the one hand, the risk of overheating can be reduced, thereby reducing the energy consumption and startup time of the system; on the other hand, the risk of insufficient heating can be reduced, so that the refrigerant can be fully vaporized and the risk of lubricating oil being carried out of the compressor by the refrigerant can be reduced, thereby helping to maintain the refrigeration efficiency of the system.

[0067] In some embodiments, before step S2, it is determined whether to use the heating device to heat the working medium in the compressor according to 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 gauge to determine whether it is in a liquid or gaseous state. If it is in a liquid state, the heating device needs to be involved to heat the system.

[0068] The gas-oil separator can also be used to determine whether lubricating oil has been taken out of the compressor. If the lubricating oil is detected to have left the compressor, the heating device (such as a heating belt) can be activated for heating. However, it is difficult to obtain the actual pressure of the refrigerant in the system and control the heating time by relying solely on the gas-oil separator.

[0069] In step S2, a first duration for heating the working medium in the compressor is determined according to the pressure information.

[0070] For example, whether the system is shut down for a long time or for a short time, the system pressure is used to determine whether there is liquefaction in the system, and the power and heating time of the compressor external heating package are adjusted to enable the system to start smoothly in a low temperature environment. It is also possible to comprehensively determine whether there is liquefaction in the system based on the system pressure and the measurement results of the exhaust temperature sensor, and then adjust the power and heating time of the compressor external heating package.

[0071] In some embodiments, the first duration for heating the working medium in the compressor is determined based on the pressure information, including: determining the current temperature of the working medium based on the second duration when the refrigeration system stops operating; determining the first duration based on the pressure information and the current temperature of the working medium.

[0072] For example, timing the time when the refrigeration system stops running (shutdown). The state of the working medium is different under different downtimes. If the system downtime 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 working state, reducing startup time and energy consumption.

[0073] If the system is shut down for a long time, the temperature of the refrigerant and lubricating oil has dropped to a low level. In this case, a longer heating time is required to make the refrigerant more fully gasified, so that the refrigerant state meets the requirements of the refrigeration cycle at startup, reduce mechanical wear at startup, and protect the compressor.

[0074] By distinguishing the downtime, different situations can be handled differently and the first duration in different situations can be calculated more accurately.

[0075] In some instances, the current temperature of the working medium is determined based on a second duration when the refrigeration system stops operating, including: when 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.

[0076] For example, if the downtime is short, the exhaust temperature of the compressor is recorded after the last shutdown as the current temperature T of the working medium. out .

[0077] Because the downtime is short and the temperature of the working medium does not change much, the temperature at the time of downtime is directly used as the current temperature to avoid unnecessary heating time. This allows the system to start up faster and enter normal working state.

[0078] In some embodiments, determining the current temperature of the working medium according to the second duration of the refrigeration system stopping operation includes: when the second duration exceeds a duration threshold, determining the current ambient temperature as the current temperature of the working medium.

[0079] For example, if the downtime is long, the ambient temperature (e.g. room temperature) is used as the current temperature T of the working medium. out .

[0080] When the system is shut down for a long time, the exhaust temperature of the compressor will gradually drop to the same as the ambient temperature. If the ambient temperature is low at this time, the temperature of the refrigerant is usually lower than its saturation temperature, which means that the refrigerant is in a supercooled state. If the system is started under such conditions, the refrigerant will leave the compressor in liquid form, and there is a risk of bringing out the lubricant. By using the current ambient temperature as the current temperature of the working medium, the system has enough heating time before starting, so that the refrigerant is fully vaporized, reducing the risk of the refrigerant carrying lubricant and protecting the compressor.

[0081] In some embodiments, a first duration for heating the working medium in the compressor is determined based on pressure information, including: determining a superheat of the working medium based on the 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.

[0082] For example, before restarting after a period of downtime, first measure the internal pressure P of the system. S According to the pressure-temperature diagram, it can be determined that the working medium is at a pressure P S The saturation temperature T S According to the temperature T after the working medium is heated S and pressure P S , determine the superheat T of the working medium O According to T S and T O The target temperature T that the refrigerant and the compressor lubricant need to be heated to can be calculated by adding Set .

[0083] Superheat is the value of the working medium after heating above the saturation temperature corresponding to its saturation pressure. Superheat is a key indicator to measure whether the refrigerant is completely gasified at the outlet of the evaporator. If the superheat is insufficient, it means that some liquid refrigerant still exists. If liquid refrigerant enters the compressor, it will damage the compressor.

[0084] By accurately determining the superheat based on the pressure information and determining the target temperature based on the superheat, more accurate superheat control can be achieved, so that the refrigerant has sufficient superheat when leaving the compressor, avoiding the refrigerant from entering the compressor in liquid form, thereby protecting the compressor and increasing the service life of the refrigeration system.

[0085] In some embodiments, a first duration is determined based on a current temperature and a target temperature of the working medium, including: determining 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 filled, and the specific heat capacity of the lubricating oil; determining 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; determining the sum of the required heat and the heat loss to determine the first duration.

[0086] For example, when assembling the system, record the amount of lubricating oil injected, m. The specific heat capacity is the constant pressure specific heat capacity, which corresponds to the pressure one by one. S , and the constant pressure specific heat capacity, C P (During the heating process, the specific heat capacity is assumed to be a constant and a conservative calculation is performed).

[0087] Based on the following heat absorption formula of the object, calculate the heat required to heat the working medium to the target temperature.

[0088] Q=C P m(T Set -T out ) (1)

[0089] Among them, Q is the heating amount required for the lubricating oil in the system. In the case of long-term shutdown, T out is the ambient temperature. In the case of a short shutdown, T out is the exhaust temperature when the machine is shut down.

[0090] At the same time, during the heating process, there is also a convective heat exchange process with the environment, and the heat loss calculation formula is as follows.

[0091] Q loss =HA(T OIL -T out ) (2)

[0092] Where H is the convective heat transfer coefficient of the compressor surface, and A is the surface area of ​​the compressor. In the case of long-term shutdown, T out is the ambient temperature. In the case of a short shutdown, T out is the exhaust temperature when the machine is shut down. OIL is the temperature of the oil during the heating process, T OIL For example, it is measured by an exhaust gas temperature sensor when the refrigeration system is operating normally.

[0093] The total amount of heat provided by the heating device is Q total The calculation is as follows.

[0094] Q total =Q+Q loss (3)

[0095] Given the power P of the heating device, the heating time t of the heating device can be calculated according to the following formula.

[0096] Q total =Pt (4)

[0097] After obtaining the heating time t, according to t and Q loss , calculate the heat loss P of the convection heat exchange between the system and the external environment per unit time loss For the same type of refrigeration system, P loss Calculation of heat loss Q loss , thereby improving the computational efficiency.

[0098] By comprehensively considering the heat loss of environmental heat exchange and the heat that the working medium needs to absorb, the actual required heating energy can be calculated more accurately, and thus the heating time can be calculated more accurately. Because the heat loss of environmental heat exchange is taken into account, it is possible to reduce the situation where the working medium does not absorb enough heat and fails to fully gasify due to environmental heat exchange, thereby maintaining the working efficiency of the system.

[0099] According to some embodiments of the present disclosure, the pressure of the refrigeration system is measured before starting, and a heating device is added. The first duration of heating the working medium in the compressor is determined based on the pressure information inside the refrigeration system; before the refrigeration system is started, the heating device heats the working medium in the compressor for the first duration.

[0100] By adding a heating device, the compressor is heated before it is started, so that the refrigerant can be fully vaporized, reducing the presence of liquid refrigerant inside the system when it is started, and reducing the risk of the refrigerant bringing the compressor lubricating oil into the system when it is started in a low-temperature environment.

[0101] At the same time, the heating time can be controlled more accurately according to the pressure information. On the one hand, it can reduce the risk of overheating, thereby reducing the energy consumption and startup time of the system. On the other hand, it can also reduce the risk of insufficient heating, so that the refrigerant can be fully vaporized and reduce the risk of lubricating oil being carried out of the compressor by the refrigerant, thereby helping to maintain the refrigeration efficiency of the system.

[0102] Figure 3 A block diagram showing a control device for a refrigeration system according to some embodiments of the present disclosure is shown.

[0103] like Figure 3 As shown, the control device 3 of the refrigeration system includes a measuring module 31 , a determining module 32 , and a heating module 33 .

[0104] The measuring module 31 is configured to measure the pressure information inside the refrigeration system, wherein the refrigeration system includes a compressor, for example, Figure 1 Step S1 is shown.

[0105] The determination module 32 is configured to determine a first duration for heating the working medium in the compressor according to the pressure information, for example, by performing the following steps: Figure 1 Step S2 is shown.

[0106] The heating module 33 is configured to make the heating device heat the working medium in the compressor for the first time period before the refrigeration system is started, for example, Figure 1 Step S3 shown.

[0107] In some embodiments, the determination module 32 is further configured to: determine the current temperature of the working medium according to the second duration of the refrigeration system stopping operation; and determine the first duration according to the pressure information and the current temperature of the working medium.

[0108] In some embodiments, the determination module 32 is further configured to: determine the current temperature of the working medium based on the second time length when the refrigeration system stops operating, including: when the second time length does not exceed a time length threshold, determine the temperature of the working medium when the refrigeration system stops operating as the current temperature of the working medium.

[0109] In some embodiments, the determination module 32 is further configured to: when the second time period exceeds a time period threshold, determine the current ambient temperature as the current temperature of the working medium.

[0110] In some embodiments, the determination module 32 is further configured to: determine the superheat of the working medium according to the pressure information; determine the target temperature of the working medium according to the superheat of the working medium; determine the first duration according to the current temperature of the working medium and the target temperature.

[0111] In some embodiments, the determination module 32 is further configured to: determine the heat required to heat the working medium to the target temperature based on the current temperature of the working medium and the target temperature, the injection amount of the lubricating oil, 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; determine the sum of the required heat and the heat loss to determine the first duration.

[0112] In some embodiments, the measuring 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 outlet of the evaporator.

[0113] Figure 4 A block diagram showing a control device for a refrigeration system according to other embodiments of the present disclosure is shown.

[0114] 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, and the memory 41 is used to store instructions for executing the control method of the refrigeration system. The processor 42 is configured to execute the control method of the refrigeration system in any of some embodiments of the present disclosure based on the instructions stored in the memory 41.

[0115] Figure 5 A block diagram of a computer system for implementing some embodiments of the present disclosure is shown.

[0116] like Figure 5As shown, the computer system 50 may be embodied in the form of a general purpose computing device. The computer system 50 includes a memory 510, a processor 520, and a bus 500 that connects the various system components.

[0117] The memory 510 may include, for example, a system memory, a non-volatile storage medium, etc. The system memory may store, for example, an operating system, an application program, a boot loader, and other programs. The system memory may include a volatile storage medium, such as a random access memory (RAM) and / or a cache memory. The non-volatile storage medium may store, for example, instructions for executing the control method of the refrigeration system in any of the embodiments of the present disclosure. The non-volatile storage medium includes, but is not limited to, a disk memory, an optical memory, a flash memory, etc.

[0118] The processor 520 may be implemented by 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 gates or transistors, and other discrete hardware components. Accordingly, each module such as the judgment module and the determination module may be implemented by a central processing unit (CPU) running instructions in a memory that execute corresponding steps, or may be implemented by a dedicated circuit that executes corresponding steps.

[0119] The bus 500 may use any of a variety of bus architectures, including, but not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, and a Peripheral Component Interconnect (PCI) bus.

[0120] The computer system 50 may also include an input / output interface 530, a network interface 540, a storage interface 550, etc. These interfaces 530, 540, 550, the memory 510, and the processor 520 may be connected via a bus 500. The input / output interface 530 may provide a connection interface for input / output devices such as a display, a mouse, and a keyboard. The network interface 540 may provide a connection interface for various networked devices. The storage interface 550 may provide a connection interface for external storage devices such as a floppy disk, a USB flash drive, and an SD card.

[0121] Here, various aspects of the present disclosure are described with reference to flowcharts and / or block diagrams of methods, devices, and computer program products according to embodiments of the present disclosure. It should be understood that each frame of the flowchart and / or block diagram and the combination of frames can be implemented by computer-readable program instructions.

[0122] These computer-readable program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable device to produce a machine, so that the processor executes the instructions to produce means for implementing the functions specified in one or more blocks in the flowchart and / or block diagram.

[0123] These computer-readable program instructions can also be readable and stored in a computer-readable memory, which cause the computer to work in a specific manner to produce a product, including instructions for implementing the functions specified in one or more blocks in the flowchart and / or block diagram.

[0124] Figure 6 A block diagram of a refrigeration system for implementing some embodiments of the present disclosure is shown.

[0125] 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.

[0126] Figure 7 A block diagram of an air conditioning system for implementing some embodiments of the present disclosure is shown.

[0127] like Figure 7 As shown, the air conditioning system 1000 includes: a refrigeration system 600 .

[0128] The present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects.

[0129] The control method and device of the refrigeration system and the computer-readable storage medium in the above-mentioned embodiments help to maintain the working efficiency of the system.

[0130] So far, the control method and device of the refrigeration system and the computer-readable storage medium according to the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

Claims

1. A control method for a refrigeration system, comprising: Measuring pressure information inside a refrigeration system, wherein the refrigeration system includes a compressor; Determining a first duration for heating the working medium in the compressor according to the pressure information; Before the refrigeration system is started, the heating device is enabled to heat the working medium in the compressor for the first time period.

2. The control method of the refrigeration system according to claim 1, wherein: The step of determining a first duration for heating the working medium in the compressor according to the pressure information includes: determining a current temperature of the working medium according to a second duration of time during which the refrigeration system stops operating; The first duration is determined according to the pressure information and the current temperature of the working medium.

3. The control method of the refrigeration system according to claim 2, wherein: The determining the current temperature of the working medium according to the second duration of the refrigeration system stopping operation includes: When the second time period does not exceed a time period 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 of the refrigeration system according to claim 2, wherein: The determining the current temperature of the working medium according to the second duration of the refrigeration system stopping operation includes: When the second time period exceeds a time period threshold, the current ambient temperature is determined as the current temperature of the working medium.

5. The control method of a refrigeration system according to claim 1, wherein: The step of determining a first duration for heating the working medium in the compressor according to the pressure information includes: Determining the superheat of the working medium according to the pressure information; Determining a target temperature of the working medium according to the superheat of the working medium; The first duration is determined according to the current temperature of the working medium and the target temperature.

6. The control method of the refrigeration system according to claim 5, wherein: The determining the first duration according to the current temperature of the working medium and the target temperature includes: Determining the amount of heat required to heat the working medium to the target temperature according to the current temperature and the target temperature of the working medium, the injection amount of lubricating oil, and the specific heat capacity of the lubricating oil; determining heat loss according to the current temperature of the working medium and the temperature measured by the exhaust temperature sensor, the convection heat transfer coefficient of the compressor surface, and the surface area of ​​the compressor; The sum of the required heat and the heat loss is determined to determine the first duration.

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

8. A control device for a refrigeration system, comprising: A measuring module, configured to measure pressure information inside a refrigeration system, wherein the refrigeration system includes a compressor; a determination module configured to determine a first duration for heating the working medium in the compressor according to the pressure information; The heating module is configured to enable the heating device to heat the working medium in the compressor for the first time period before the refrigeration system is started.

9. A control device for a refrigeration system, comprising: Memory; as well as A processor coupled to the memory, wherein the processor is configured to execute the control method of the refrigeration system according to any one of claims 1 to 7 based on instructions stored in the memory.

10. A computer-readable storage medium having computer program instructions stored thereon, wherein when the instructions are executed by a processor, the control method of the refrigeration system according to any one of claims 1 to 7 is implemented.

11. A computer program product, comprising computer program instructions, which, when executed by a processor, implement the control method of a refrigeration system according to any one of claims 1 to 7.

12. A refrigeration system comprising: The control device for a refrigeration system according to claim 8 or 9; compressor; Pressure sensor; as well as Heating device.

13. An air conditioning system, comprising: The refrigeration system of claim 12.

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