Method and device for adjusting refrigerant circulation amount, and refrigeration system

Abstract

The application discloses a refrigerant circulation quantity adjusting method and device and a refrigeration system. The method comprises the following steps: determining the refrigerant circulation quantity in the refrigeration system when the refrigeration system is running; determining the running state of the refrigeration system according to the refrigerant circulation quantity; and controlling the opening state of switch valve one and switch valve two according to the running state of the refrigeration system, so as to adjust the refrigerant circulation quantity in the refrigeration system. Through the application, the problem of poor adjustment effect of the refrigerant circulation quantity in the refrigeration system in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of information processing, in particular to a refrigerant circulation amount adjustment method and device and a refrigeration system. BACKGROUND

[0002] With the continuous development of data center rooms, the volume of various equipment in the data center rooms is continuously reduced, the amount of information transmission, storage and calculation is continuously improved, and therefore the heat density of the data center is gradually increased. In order to respond to the call of national energy saving and emission reduction and the requirements of relevant standards, the existing data center rooms are gradually improved or newly built data center rooms are gradually improved in indoor design temperature. Under the same heat load, the improvement of the indoor design temperature can improve the refrigerating capacity of the single machine compressor, reduce the investment of the refrigeration equipment, and also improve the evaporation temperature of the unit, so that the operation energy efficiency of the compressor is higher, thereby improving the energy efficiency of the system in many aspects.

[0003] The improvement of the indoor design temperature also provides an opportunity for the natural cooling utilization of the data center rooms. The driving force of the natural cooling utilization is derived from the indoor and outdoor temperature difference or the heat exchange between the indoor temperature and the outdoor air after evaporation cooling, so as to utilize the natural cooling. The higher indoor temperature makes it easier to establish a higher indoor and outdoor temperature difference, so that the natural cooling can be more easily utilized.

[0004] At present, there are many forms of natural cooling utilization in the related art, and each has advantages and disadvantages. The fresh air refrigeration in the related art is the most direct way of natural cooling utilization, but the quality of the fresh air is difficult to accurately control, and it may also bring wet load to the data center room. If accurate control is required, it is necessary to increase investment in fresh air treatment; moreover, the fresh air related equipment occupies a large area and also damages the building structure of the data center room; therefore, the fresh air system is generally not recommended for computer data center rooms. In addition, in the related art, indirect evaporative cooling is also a kind of natural cooling source; it directly utilizes the outdoor low-temperature air (or the outdoor air after evaporation cooling) through an air-air heat exchanger to reduce the indoor air temperature, so as to achieve the purpose of energy saving; but the system structure is complex, and mechanical refrigeration supplement is also required; the unit structure is complex, the heat exchanger structure is complex, and the indoor or outdoor air duct requires strict sealing, so the design, production and maintenance costs are relatively high. In the related art, the heat pipe type air conditioner can also effectively utilize the natural cooling; the gravity heat pipe does not need additional power circulation to produce refrigeration effect under the indoor and outdoor temperature difference, but the power is unstable.

[0005] Therefore, in the prior art, the pump cycle is commonly used by pushing the refrigerant pump. When the natural cold source is insufficient, the mechanical refrigeration of the compressor is increased to supplement the refrigeration capacity. Through the design of the system pipeline, the compressor and the fluorine pump can be combined in one refrigeration system. The pump mode is used when the natural cold source can be used. The compressor mode is used when the refrigeration capacity cannot meet the heat load demand. The fluorine pump system described above can operate in the compressor refrigeration mode and the fluorine pump refrigeration mode. However, the demand for refrigerant is quite different in the two modes. The refrigerant charge required in the fluorine pump mode is much larger than that in the compressor mode. In order to balance the difference in the charge amount in the two modes, a liquid storage tank is usually connected in series to buffer the difference in the refrigerant in the two modes. However, the liquid storage tank has a corresponding negative impact. Firstly, the liquid storage tank is connected in series in the system. The saturated refrigerant in the tank causes the lack of supercooling degree before the valve in the compressor mode. The refrigerant before the expansion valve is easy to fill with a large number of bubbles. On the one hand, the flow area of the expansion valve is reduced, and the capacity of the valve is obviously attenuated. On the other hand, the system flow becomes very unstable, and the expansion valve is constantly adjusted, which causes the low pressure fluctuation of the refrigeration system, thereby causing the refrigeration system to produce liquid return or the risk of low pressure alarm.

[0006] At present, there is no effective solution to the problem of poor refrigerant circulation adjustment effect in the related art. SUMMARY

[0007] The main purpose of the present application is to provide a refrigerant circulation adjustment method and device and a refrigeration system to solve the problem of poor refrigerant circulation adjustment effect in the related art.

[0008] In order to achieve the above purpose, according to another aspect of the present application, a refrigeration system is provided. The system comprises a liquid storage tank, a condenser, a compressor and an evaporator connected in series through pipelines. A bypass pipe one is arranged between the pipeline connecting the liquid storage tank and the condenser, and a switch valve one is arranged on the bypass pipe one. A bypass pipe two is arranged between the liquid storage tank and the pipeline after the target expansion valve, and a switch valve two is arranged on the bypass pipe two. The switch valve two has a throttling function. The target expansion valve is arranged on the inlet pipeline of the evaporator.

[0009] In order to achieve the above purpose, according to one aspect of the present application, a refrigerant circulation adjustment method is provided. The method comprises: determining the refrigerant circulation amount in the refrigeration system when the refrigeration system is running; determining the running state of the refrigeration system according to the refrigerant circulation amount; and controlling the opening state of the switch valve one and the switch valve two according to the running state of the refrigeration system, so as to adjust the refrigerant circulation amount in the refrigeration system.

[0010] Further, determining the operation state of the refrigeration system according to the refrigerant circulation amount comprises: if it is determined that the refrigerant circulation amount is less than a first preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a liquid accumulator releasing refrigerant state; if it is determined that the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than a second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a refrigeration state; and if it is determined that the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a liquid accumulator recovering refrigerant state.

[0011] Further, controlling the opening state of the switch valve one and the switch valve two according to the operation state of the refrigeration system to adjust the refrigerant circulation amount in the refrigeration system comprises: if the operation state of the refrigeration system is the refrigeration state, controlling the switch valve one and the switch valve two to be in a closed state; if the operation state of the refrigeration system is the liquid accumulator releasing refrigerant state, controlling the switch valve one to be in a closed state and the switch valve two to be in an open state; and if the operation state of the refrigeration system is the liquid accumulator recovering refrigerant state, controlling the switch valve one to be in an open state and the switch valve two to be in a closed state.

[0012] Further, the method further comprises: if the operation state of the refrigeration system is the refrigeration state, detecting a refrigerant supercooling degree before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and determining the operation state of the refrigeration system based on the refrigerant supercooling degree.

[0013] Further, determining the operation state of the refrigeration system based on the refrigerant supercooling degree comprises: determining whether the refrigerant supercooling degree is within a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree; and when the refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree and less than the second preset refrigerant supercooling degree, controlling the operation state of the refrigeration system to remain in the refrigeration state.

[0014] Further, determining the operation state of the refrigeration system based on the supercooling degree of the refrigerant further comprises: if the supercooling degree of the refrigerant is less than or equal to a first preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a liquid accumulator refrigerant releasing state, controlling the first switch valve to be in a closed state and the second switch valve to be in an open state, and detecting whether the supercooling degree of the refrigerant is greater than a third preset supercooling degree of the refrigerant, wherein the third preset supercooling degree of the refrigerant is less than the first preset supercooling degree of the refrigerant; if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the operation state of the refrigeration system to continue to be the liquid accumulator refrigerant releasing state; and if the supercooling degree of the refrigerant is greater than the third preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a refrigeration state.

[0015] Further, determining the operation state of the refrigeration system based on the supercooling degree of the refrigerant further comprises: if the supercooling degree of the refrigerant is less than or equal to a first preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a liquid accumulator refrigerant releasing state, controlling the first switch valve to be in a closed state and the second switch valve to be in an open state, and detecting whether the supercooling degree of the refrigerant is greater than a third preset supercooling degree of the refrigerant, wherein the third preset supercooling degree of the refrigerant is less than the first preset supercooling degree of the refrigerant; if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the operation state of the refrigeration system to continue to be the liquid accumulator refrigerant releasing state; and if the supercooling degree of the refrigerant is greater than the third preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a refrigeration state.

[0016] Further, determining the circulation amount of the refrigerant in the refrigeration system comprises: monitoring the supercooling degree of the refrigerant at the outlet of the condenser; and determining the circulation amount of the refrigerant based on the supercooling degree of the refrigerant at the outlet of the condenser.

[0017] To achieve the above object, according to another aspect of the present application, a device for adjusting the circulation amount of refrigerant is provided. The device comprises: a first determining unit configured to determine the circulation amount of refrigerant in the refrigeration system when the refrigeration system is running; a second determining unit configured to determine the operation state of the refrigeration system according to the circulation amount of refrigerant; and a first control unit configured to control the opening state of the first switch valve and the second switch valve according to the operation state of the refrigeration system, so as to adjust the circulation amount of refrigerant in the refrigeration system.

[0018] Further, the second determining unit comprises: a first processing module, configured to determine that the operation state of the refrigeration system is a liquid tank releasing refrigerant state if the refrigerant circulation amount is less than a first preset refrigerant circulation amount; a second processing module, configured to determine that the operation state of the refrigeration system is a refrigeration state if the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than a second preset refrigerant circulation amount; and a third processing module, configured to determine that the operation state of the refrigeration system is a liquid tank recovering refrigerant state if the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount.

[0019] Further, the first control unit comprises: a first control module, configured to control the switch valve one and the switch valve two to be in a closed state if the operation state of the refrigeration system is the refrigeration state; a second control module, configured to control the switch valve one to be in a closed state and the switch valve two to be in an open state if the operation state of the refrigeration system is the liquid tank releasing refrigerant state; and a third control module, configured to control the switch valve one to be in an open state and the switch valve two to be in a closed state if the operation state of the refrigeration system is the liquid tank recovering refrigerant state.

[0020] Further, the device further comprises: a first detecting unit, configured to detect a refrigerant supercooling degree before a target expansion valve if the operation state of the refrigeration system is the refrigeration state, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and a third determining unit, configured to determine the operation state of the refrigeration system based on the refrigerant supercooling degree.

[0021] Further, the third determining unit comprises: a first judging module, configured to judge whether the refrigerant supercooling degree is within a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree; and a fourth control module, configured to control the operation state of the refrigeration system to remain in the refrigeration state when the refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree and less than the second preset refrigerant supercooling degree.

[0022] Further, the third determining unit further comprises: a fourth processing module, configured to, if the refrigerant supercooling degree is less than or equal to a first preset refrigerant supercooling degree, control the refrigeration system to enter a liquid accumulator refrigerant releasing state, control the first switch valve to be in a closed state and the second switch valve to be in an open state, and detect whether the refrigerant supercooling degree is greater than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is less than the first preset refrigerant supercooling degree; a fifth control module, configured to, if the refrigerant supercooling degree is not greater than the third preset refrigerant supercooling degree, control the operation state of the refrigeration system to continue to be maintained as the liquid accumulator refrigerant releasing state; and a sixth control module, configured to, if the refrigerant supercooling degree is greater than the third preset refrigerant supercooling degree, control the refrigeration system to enter a refrigeration state.

[0023] Further, the third determining unit further comprises: a fifth processing module, configured to, if the refrigerant supercooling degree is greater than or equal to a second preset refrigerant supercooling degree, control the refrigeration system to enter a liquid accumulator refrigerant recovering state, control the first switch valve to be in an open state and the second switch valve to be in a closed state, and detect whether the refrigerant supercooling degree is less than a fourth preset refrigerant supercooling degree, wherein the fourth preset refrigerant supercooling degree is greater than the second preset refrigerant supercooling degree; a seventh control module, configured to, if the refrigerant supercooling degree is not less than the fourth preset refrigerant supercooling degree, control the operation state of the refrigeration system to continue to be maintained as the liquid accumulator refrigerant recovering state; and an eighth control module, configured to, if the refrigerant supercooling degree is less than the fourth preset refrigerant supercooling degree, control the refrigeration system to enter the refrigeration state.

[0024] Further, the first determining unit comprises: a first monitoring module, configured to monitor the refrigerant supercooling degree of the condenser outlet; and a second determining module, configured to determine the refrigerant circulation amount based on the refrigerant supercooling degree of the condenser outlet.

[0025] In order to achieve the above object, according to another aspect of the present application, a processor is provided, which is used for running a program, wherein the program performs the refrigerant circulation amount adjustment method of any one of the above aspects when running.

[0026] In order to achieve the above object, according to another aspect of the present application, a storage medium is provided, which comprises a stored program, wherein the program performs the refrigerant circulation amount adjustment method of any one of the above aspects when running.

[0027] The application provides a refrigeration system and a refrigerant circulation amount adjusting method thereof, and belongs to the technical field of refrigeration systems. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein in conjunction with the description of the application. The drawings are as follows:

[0029] Figure 1 is a schematic diagram of a refrigeration system according to an embodiment of the application;

[0030] Figure 2 is a flow chart of a refrigerant circulation amount adjusting method according to an embodiment of the application;

[0031] Figure 3 is a schematic diagram of a refrigerant circulation amount adjusting method according to an embodiment of the application;

[0032] Figure 4 is a schematic diagram of a refrigerant circulation amount adjusting device according to an embodiment of the application. DETAILED DESCRIPTION

[0033] It should be noted that the embodiments and features in the application can be combined with each other without conflict. The application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] In order to enable those skilled in the art to better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the application.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and in the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0036] According to the embodiments of the present application, a refrigeration system is provided.

[0037] Figure 1 is a schematic diagram of the refrigeration system provided according to the embodiments of the present application. As shown in the figure, the system includes the following: Figure 1

[0038] The liquid storage tank, the condenser, the compressor and the evaporator are connected in sequence by pipelines. A bypass pipe one is arranged between the pipeline connecting the liquid storage tank and the condenser, and a switch valve one is arranged on the bypass pipe one. A bypass pipe two is arranged between the pipeline connecting the liquid storage tank and the target expansion valve, and a switch valve two is arranged on the bypass pipe two, wherein the switch valve two has a throttling function. The target expansion valve is arranged on the inlet pipeline of the evaporator.

[0039] In the refrigeration system provided in the embodiments of the present application, on the basis of the ordinary compressor fluorine pump system, the position of the liquid storage tank in the system is changed, and the liquid storage tank in series in the system is changed to be in parallel in the refrigeration system. Specifically, a bypass pipe one is added between the liquid storage tank and the liquid pipe (i.e. the pipeline connecting the condenser), and a switch valve one is added on the bypass pipe one. In addition, a bypass pipe two is also added between the liquid storage tank and the pipeline after the target expansion valve, and a switch valve two is added on the bypass pipe two. It should be noted that the target expansion valve is arranged on the inlet pipeline of the evaporator, and the pipeline after the target expansion valve is a low-pressure pipeline. The bypass pipe two can be added between the liquid storage tank and the suction pipe of the compressor, or the bypass pipe two can be added between the liquid storage tank and the inlet pipeline of the evaporator after the target expansion valve. By adding the bypass pipe one and the bypass pipe two in the pipeline connecting the liquid storage tank, the condenser, the compressor and the evaporator, the stable operation of the refrigeration system is ensured, and the adjustment effect of the refrigerant circulation amount in the refrigeration system is improved.

[0040] It should be noted that Figure 1 ​The structure shown in the schematic diagram of the refrigeration system provided by the embodiment of the present application can also have various variants. For example, a switch valve is added before the compressor, the throttling element is connected in parallel with the switch valve, and a maintenance valve, a protection element, a sensor, or the like is added in the pipeline.

[0041] In addition, the technology of connecting the liquid storage tank in parallel with the system and using the pipeline and valve design to realize the functions of storing, releasing, and maintaining the refrigerant from the system to the liquid storage tank by using the opening and closing of the valve and the pressure difference of the system itself is also applicable to a heat pump system having different operation modes of refrigeration and heating.

[0042] According to the embodiment of the present application, a refrigerant circulation amount adjusting method is also provided. The refrigerant circulation amount adjusting method provided by the embodiment of the present application can be applied to the refrigeration system described above.

[0043] Figure 2 is a flowchart of the refrigerant circulation amount adjusting method according to the embodiment of the present application. As shown in Figure 2 , the method comprises the following steps:

[0044] Step S101: determining the refrigerant circulation amount in the refrigeration system when the refrigeration system is running.

[0045] When determining the refrigerant circulation amount in the refrigeration system, there can be various ways, for example, monitoring the refrigerant supercooling degree at the outlet of the condenser; and determining the refrigerant circulation amount based on the refrigerant supercooling degree at the outlet of the condenser. Through the above-mentioned ways, the refrigerant circulation amount in the refrigeration system can be accurately and quickly obtained.

[0046] Step S102: determining the operation state of the refrigeration system according to the refrigerant circulation amount.

[0047] When the refrigeration system is running, the refrigerant circulation amount is detected in real time, and based on the refrigerant circulation amount, it can be determined whether the refrigeration system is in a state of excessive refrigerant or insufficient refrigerant at this time. According to the amount of the refrigerant circulation amount, the operation state of the refrigeration system can be determined.

[0048] Step S103: controlling the opening state of the switch valve one and the switch valve two according to the operation state of the refrigeration system, so as to adjust the refrigerant circulation amount in the refrigeration system.

[0049] When the refrigeration system is running, according to the operation state of the refrigeration system and by using the opening and closing of the switch valve and the pressure difference of the refrigeration system itself, the functions of storing, releasing, and maintaining the refrigerant from the refrigeration system to the liquid storage tank can be realized, so that the refrigerant circulation amount in the refrigeration system can be conveniently and quickly adjusted.

[0050] In summary, by the steps S101-S103, the operation state of the refrigeration system is determined by the refrigerant circulation amount in the refrigeration system, and the refrigerant circulation amount in the refrigeration system is adjusted according to the operation state of the refrigeration system and by controlling the opening and closing of the two switch valves. Thus, the stable operation of the refrigeration system is ensured, and the adjustment effect of the refrigerant circulation amount in the refrigeration system is improved.

[0051] Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiments of the present application, determining the operation state of the refrigeration system according to the refrigerant circulation amount comprises: if it is determined that the refrigerant circulation amount is less than the first preset refrigerant circulation amount, determining that the operation state of the refrigeration system is the liquid accumulator releasing refrigerant state; if it is determined that the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than the second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is the refrigeration state; and if it is determined that the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is the liquid accumulator recovering refrigerant state.

[0052] In the operation of the refrigeration system, the refrigerant circulation amount is detected in real time, and the operation state of the refrigeration system is determined according to the detection and comparison of the refrigerant circulation amount. For example, if the refrigerant circulation amount is less than the first preset refrigerant circulation amount, the refrigeration system is controlled to enter the liquid accumulator releasing refrigerant state until the refrigerant amount is appropriate; if the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than the second preset refrigerant circulation amount, the refrigeration system is controlled to enter the refrigeration state; and if the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, the refrigeration system is controlled to enter the liquid accumulator recovering refrigerant state until the refrigerant amount is appropriate.

[0053] According to the detection and comparison of the refrigerant circulation amount in the refrigeration system, the operation state of the refrigeration system at this time can be determined accurately and quickly.

[0054] Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiments of the present application, according to the operation state of the refrigeration system, the opening and closing states of the switch valve one and the switch valve two are controlled to adjust the refrigerant circulation amount in the refrigeration system, which comprises: if the operation state of the refrigeration system is the refrigeration state, the switch valve one and the switch valve two are controlled to be in the closed state; if the operation state of the refrigeration system is the liquid accumulator releasing refrigerant state, the switch valve one is controlled to be in the closed state and the switch valve two is controlled to be in the open state; and if the operation state of the refrigeration system is the liquid accumulator recovering refrigerant state, the switch valve one is controlled to be in the open state and the switch valve two is controlled to be in the closed state.

[0055] When the refrigeration system is in the refrigeration state, the compressor or the refrigerant pump operates normally, and the control switch valve one and the control switch valve two are both in the closed state. Therefore, the liquid storage tank and the refrigeration cycle pipeline are isolated at this time, and the liquid storage tank does not affect the refrigeration system at this time, so that the problem of supercooling degree loss does not occur in the refrigeration system.

[0056] When the refrigeration system is in the refrigerant release state of the liquid storage tank, the compressor in the refrigeration system can still operate normally, the control switch valve one is in the closed state, and the control switch valve two is in the open state. At this time, the refrigerant in the liquid storage tank is sucked out by the operating compressor and discharged into the refrigerant circulation loop of the refrigeration system, so as to achieve the effect of supplementing the refrigerant in the refrigeration cycle.

[0057] When the refrigeration system is in the refrigerant recovery state of the liquid storage tank, the compressor or the pump in the refrigeration system operates normally, the control switch valve two is in the closed state, and the control switch valve one is in the open state. At this time, the refrigerant in the liquid storage tank is at the saturation pressure corresponding to the ambient temperature, and the outlet of the condenser is at the saturation pressure corresponding to the condensing temperature. Since the ambient temperature is lower than the condensing temperature, the pressure in the liquid storage tank is lower than the condensing fluid pressure at the outlet of the condenser. Therefore, the refrigerant in the condenser enters the liquid storage tank to achieve the effect of recovering the refrigerant in the liquid storage tank.

[0058] Through the above scheme, the opening state of the two switch valves can be controlled according to the operating state of the refrigeration system, so that the refrigerant circulation amount in the refrigeration system can be adjusted conveniently and quickly, thereby ensuring the stable operation of the refrigeration system, and improving the adjustment effect of the refrigerant circulation amount in the refrigeration system.

[0059] Optionally, in the refrigerant circulation amount adjustment method provided in the embodiments of the present application, the method further includes: if the operating state of the refrigeration system is the refrigeration state, detecting the refrigerant supercooling degree before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of an evaporator; and determining the operating state of the refrigeration system based on the refrigerant supercooling degree.

[0060] By detecting the supercooling degree before the expansion valve of the inlet pipeline of the evaporator in the refrigeration system, the operating state of the refrigeration system can be accurately and quickly determined according to the detected refrigerant supercooling degree before the target expansion valve.

[0061] Optionally, in the refrigerant circulation amount adjustment method provided in the embodiments of the present application, determining the operating state of the refrigeration system based on the refrigerant supercooling degree includes: judging whether the refrigerant supercooling degree is within a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree; and when the refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree and less than the second preset refrigerant supercooling degree, the operating state of the refrigeration system is kept in the refrigeration state.

[0062] First, set the lower limit of the supercooling degree Ta (corresponding to the first preset refrigerant supercooling degree described above) and the upper limit value Tb (corresponding to the second preset refrigerant supercooling degree described above), wherein Tb is greater than Ta, and the two values can be flexibly set according to the actual situation of the refrigeration system. When the refrigeration system is in the refrigeration state, the supercooling degree before the expansion valve is detected in real time. If the supercooling degree before the expansion valve is between Ta and Tb, the refrigeration state is continued.

[0063] In the above scheme, after the refrigeration system is in the refrigeration state, by continuing to monitor whether the refrigerant supercooling degree is within the range of the first preset refrigerant supercooling degree and the second preset refrigerant supercooling degree, it can be accurately judged whether the refrigeration system continues to maintain the refrigeration state.

[0064] Optionally, in the refrigerant circulation amount adjustment method provided in the embodiments of the present application, determining the operating state of the refrigeration system based on the refrigerant supercooling degree further includes: if the refrigerant supercooling degree is less than or equal to the first preset refrigerant supercooling degree, controlling the refrigeration system to enter a liquid tank refrigerant release state, controlling the on-off valve one to be in a closed state and the on-off valve two to be in an open state, and detecting whether the refrigerant supercooling degree is greater than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is less than the first preset refrigerant supercooling degree; if the refrigerant supercooling degree is not greater than the third preset refrigerant supercooling degree, controlling the operating state of the refrigeration system to continue to maintain the liquid tank refrigerant release state; and if the refrigerant supercooling degree is greater than the third preset refrigerant supercooling degree, controlling the refrigeration system to enter the refrigeration state.

[0065] If the refrigerant supercooling degree is not within the range of the first preset refrigerant supercooling degree and the second preset refrigerant supercooling degree, it is judged whether the supercooling degree before the valve is less than or equal to Ta (corresponding to the first preset refrigerant supercooling degree described above). If yes, it indicates that the refrigeration cycle refrigerant is insufficient, and the refrigeration system may be in a liquid supply insufficient condition, and the refrigeration system is controlled to enter a liquid tank release state to supplement the refrigerant in the liquid tank in the refrigeration cycle. In this state, it is continuously detected and judged whether the supercooling degree before the valve is greater than Ta+1K (corresponding to the third preset refrigerant supercooling degree described above). It should be noted that the 1 degree is a designed hysteresis to maintain stability. If the judgment result is yes, it indicates that the refrigerant is sufficient, and the refrigeration system is controlled to enter the refrigeration state. If the judgment result is no, it indicates that the refrigerant is insufficient, and the refrigeration system still needs to be maintained in the liquid tank release state.

[0066] In the above scheme, after the refrigeration system is in the refrigeration state, the refrigerant supercooling degree is continuously monitored, and the operating state of the refrigeration system is adjusted in real time according to the refrigerant supercooling degree, so as to ensure the stable operation of the refrigeration system, and thereby improve the adjustment effect of the refrigerant circulation amount in the refrigeration system.

[0067] Optionally, in the refrigerant circulation amount adjustment method provided in the embodiment of the present application, the operation state of the refrigeration system is determined based on the refrigerant supercooling degree, and the method further comprises: if the refrigerant supercooling degree is greater than or equal to the second preset refrigerant supercooling degree, controlling the refrigeration system to enter a liquid accumulator recovery refrigerant state, controlling the on-off valve one to be in an open state and the on-off valve two to be in a closed state, and detecting whether the refrigerant supercooling degree is less than a fourth preset refrigerant supercooling degree, wherein the fourth preset refrigerant supercooling degree is greater than the second preset refrigerant supercooling degree; if the refrigerant supercooling degree is not less than the fourth preset refrigerant supercooling degree, controlling the operation state of the refrigeration system to continue to be the liquid accumulator recovery refrigerant state; and if the refrigerant supercooling degree is less than the fourth preset refrigerant supercooling degree, controlling the refrigeration system to enter a refrigeration state.

[0068] If the supercooling degree before the valve is greater than or equal to Tb (corresponding to the second preset refrigerant supercooling degree described above), it means that there is too much refrigerant in the refrigeration cycle, and the effective heat exchange area of the condenser is not enough, so the system will enter the liquid accumulator recovery state, that is, the refrigerant in the liquid accumulator is discharged into the liquid accumulator. In this state, the supercooling degree before the valve is continuously detected and determined whether it is less than Tb-1K (corresponding to the fourth preset refrigerant supercooling degree described above). It should be noted that 1K is a designed hysteresis to maintain stability. If the determination result is yes, it means that the amount of refrigerant is not excessive, and the refrigeration system enters the refrigeration state. If the determination result is no, it means that the amount of refrigerant is still excessive, and the refrigeration system still needs to be kept in the liquid accumulator recovery state.

[0069] In the above scheme, after the refrigeration system is in the refrigeration state, the refrigerant supercooling degree is continuously monitored, and the operation state of the refrigeration system is adjusted in real time according to the refrigerant supercooling degree, so as to ensure the stable operation of the refrigeration system, and thus improve the adjustment effect of the refrigerant circulation amount in the refrigeration system.

[0070] The control flow chart of the refrigeration system in the refrigeration state is shown in FIG. 4. Figure 3 The first preset refrigerant supercooling degree is Ta in the figure, the second preset refrigerant supercooling degree is Tb in the figure, the third preset refrigerant supercooling degree is Ta+1K in the figure, and the fourth preset refrigerant supercooling degree is Tb-1K in the figure.

[0071] It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flow chart, in some cases, the steps shown or described can be executed in an order different from that herein.

[0072] The embodiment of the present application also provides a refrigerant circulation amount adjustment device. It should be noted that the refrigerant circulation amount adjustment device of the embodiment of the present application can be used to execute the refrigerant circulation amount adjustment method provided in the embodiment of the present application. The refrigerant circulation amount adjustment device provided in the embodiment of the present application is introduced as follows.

[0073] Figure 4 is a schematic diagram of a refrigerant circulation amount adjusting device according to an embodiment of the present application. As shown in the figure, the device comprises a first determination unit 401, a second determination unit 402 and a first control unit 403. Figure 4

[0074] Specifically, the first determination unit 401 is configured to determine the refrigerant circulation amount in the refrigeration system when the refrigeration system is running.

[0075] The second determination unit 402 is configured to determine the running state of the refrigeration system according to the refrigerant circulation amount.

[0076] The first control unit 403 is configured to control the opening state of the switch valve one and the switch valve two according to the running state of the refrigeration system, so as to adjust the refrigerant circulation amount in the refrigeration system.

[0077] In summary, the refrigerant circulation amount adjusting device provided by the embodiment of the present application determines the refrigerant circulation amount in the refrigeration system through the first determination unit 401 when the refrigeration system is running, determines the running state of the refrigeration system according to the refrigerant circulation amount through the second determination unit 402, and adjusts the refrigerant circulation amount in the refrigeration system according to the running state of the refrigeration system through the first control unit 403, which solves the problem of poor adjustment effect of the refrigerant circulation amount in the refrigeration system in the related art, determines the running state of the refrigeration system according to the refrigerant circulation amount in the refrigeration system, and adjusts the refrigerant circulation amount in the refrigeration system according to the opening or closing of the switch valve one and the switch valve two, so as to ensure the stable running of the refrigeration system and improve the adjustment effect of the refrigerant circulation amount in the refrigeration system.

[0078] Optionally, in the refrigerant circulation amount adjusting device provided by the embodiment of the present application, the second determination unit comprises a first processing module configured to determine that the running state of the refrigeration system is the liquid tank refrigerant releasing state if the refrigerant circulation amount is less than a first preset refrigerant circulation amount; a second processing module configured to determine that the running state of the refrigeration system is the refrigeration state if the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than a second preset refrigerant circulation amount; and a third processing module configured to determine that the running state of the refrigeration system is the liquid tank refrigerant recycling state if the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount.

[0079] ​Optionally, in the refrigerant circulation amount adjusting device provided by the embodiment of the present application, the first control unit comprises: a first control module, configured to control the switch valve one and the switch valve two to be in the closed state if the operation state of the refrigeration system is the refrigeration state; a second control module, configured to control the switch valve one to be in the closed state and the switch valve two to be in the open state if the operation state of the refrigeration system is the liquid tank refrigerant releasing state; and a third control module, configured to control the switch valve one to be in the open state and the switch valve two to be in the closed state if the operation state of the refrigeration system is the liquid tank refrigerant recycling state.

[0080] Optionally, in the refrigerant circulation amount adjusting device provided by the embodiment of the present application, the device further comprises: a first detection unit, configured to detect the refrigerant supercooling degree before the target expansion valve if the operation state of the refrigeration system is the refrigeration state, wherein the target expansion valve is arranged on the inlet pipeline of the evaporator; and a third determination unit, configured to determine the operation state of the refrigeration system based on the refrigerant supercooling degree.

[0081] Optionally, in the refrigerant circulation amount adjusting device provided by the embodiment of the present application, the third determination unit comprises: a first judgment module, configured to judge whether the refrigerant supercooling degree is within the range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree; and a fourth control module, configured to control the operation state of the refrigeration system to remain in the refrigeration state when the refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree and less than the second preset refrigerant supercooling degree.

[0082] Optionally, in the refrigerant circulation amount adjusting device provided by the embodiment of the present application, the third determination unit further comprises: a fourth processing module, configured to control the refrigeration system to enter the liquid tank refrigerant releasing state, control the switch valve one to be in the closed state and the switch valve two to be in the open state, and detect whether the refrigerant supercooling degree is greater than a third preset refrigerant supercooling degree if the refrigerant supercooling degree is less than or equal to the first preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is less than the first preset refrigerant supercooling degree; a fifth control module, configured to control the operation state of the refrigeration system to continue to remain in the liquid tank refrigerant releasing state if the refrigerant supercooling degree is not greater than the third preset refrigerant supercooling degree; and a sixth control module, configured to control the refrigeration system to enter the refrigeration state if the refrigerant supercooling degree is greater than the third preset refrigerant supercooling degree.

[0083] Optionally, in the refrigerant circulation amount adjusting device provided by the embodiment of the present application, the third determining unit further comprises: a fifth processing module, configured to: if the refrigerant supercooling degree is greater than or equal to the second preset refrigerant supercooling degree, control the refrigeration system to enter a liquid accumulator refrigerant recovery state, control the first switch valve to be in an open state and the second switch valve to be in a closed state, and detect whether the refrigerant supercooling degree is less than a fourth preset refrigerant supercooling degree, wherein the fourth preset refrigerant supercooling degree is greater than the second preset refrigerant supercooling degree; a seventh control module, configured to: if the refrigerant supercooling degree is not less than the fourth preset refrigerant supercooling degree, control the operation state of the refrigeration system to continue to be maintained as the liquid accumulator refrigerant recovery state; and an eighth control module, configured to: if the refrigerant supercooling degree is less than the fourth preset refrigerant supercooling degree, control the refrigeration system to enter a refrigeration state.

[0084] Optionally, in the refrigerant circulation amount adjusting device provided by the embodiment of the present application, the first determining unit comprises: a first monitoring module, configured to monitor the refrigerant supercooling degree at the outlet of the condenser; and a second determining module, configured to determine the refrigerant circulation amount based on the refrigerant supercooling degree at the outlet of the condenser.

[0085] The refrigerant circulation amount adjusting device comprises a processor and a memory, and the first determining unit 401, the second determining unit 402 and the first control unit 403 are all stored in the memory as program units, and the corresponding functions are realized by the processor executing the program units stored in the memory.

[0086] The processor comprises a core, and the core retrieves the corresponding program units from the memory. The core can be set as one or more, and the effect of adjusting the refrigerant circulation amount in the refrigeration system is realized by adjusting the core parameters.

[0087] The memory can comprise a non-permanent memory in a computer readable medium, a random access memory (RAM) and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory comprises at least one memory chip.

[0088] The embodiment of the present application provides a storage medium, which stores a program, and the program is executed by a processor to realize the refrigerant circulation amount adjusting method.

[0089] The embodiment of the present application provides a processor, which is used to run a program, and the program is executed to realize the refrigerant circulation amount adjusting method.

[0090] The embodiment of the present application provides a device, which comprises a processor, a memory, and a program stored in the memory and executable on the processor, and the processor implements the following steps when executing the program: determining a refrigerant circulation amount in the refrigeration system when the refrigeration system is running; determining an operation state of the refrigeration system according to the refrigerant circulation amount; and controlling opening states of the switch valve one and the switch valve two according to the operation state of the refrigeration system, so as to adjust the refrigerant circulation amount in the refrigeration system.

[0091] The processor further implements the following steps when executing the program: the step of determining the operation state of the refrigeration system according to the refrigerant circulation amount comprises: if it is judged that the refrigerant circulation amount is less than a first preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a liquid accumulator refrigerant releasing state; if it is judged that the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than a second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a normal refrigeration state; and if it is judged that the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a liquid accumulator refrigerant recovering state.

[0092] The processor further implements the following steps when executing the program: the step of controlling the opening states of the switch valve one and the switch valve two according to the operation state of the refrigeration system, so as to adjust the refrigerant circulation amount in the refrigeration system comprises: if the operation state of the refrigeration system is the normal refrigeration state, controlling the switch valve one and the switch valve two to be in a closed state; if the operation state of the refrigeration system is the liquid accumulator refrigerant releasing state, controlling the switch valve one to be in a closed state and the switch valve two to be in an open state; and if the operation state of the refrigeration system is the liquid accumulator refrigerant recovering state, controlling the switch valve one to be in an open state and the switch valve two to be in a closed state.

[0093] The processor further implements the following steps when executing the program: the method further comprises: if the operation state of the refrigeration system is the normal refrigeration state, detecting a refrigerant supercooling degree before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and determining the operation state of the refrigeration system based on the refrigerant supercooling degree.

[0094] The processor further implements the following steps when executing the program: the step of determining the operation state of the refrigeration system based on the refrigerant supercooling degree comprises: judging whether the refrigerant supercooling degree is within a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree; and when the refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree and less than the second preset refrigerant supercooling degree, controlling the operation state of the refrigeration system to remain in the normal refrigeration state.

[0095] The processor, when executing the program, further implements the following steps: determining the operation state of the refrigeration system based on the supercooling degree of the refrigerant further comprises: if the supercooling degree of the refrigerant is less than or equal to a first preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a liquid accumulator refrigerant releasing state, controlling the first on-off valve to be in a closed state and the second on-off valve to be in an open state, and detecting whether the supercooling degree of the refrigerant is greater than a third preset supercooling degree of the refrigerant, wherein the third preset supercooling degree of the refrigerant is less than the first preset supercooling degree of the refrigerant; if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the operation state of the refrigeration system to continue to be maintained as the liquid accumulator refrigerant releasing state; and if the supercooling degree of the refrigerant is greater than the third preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a refrigeration state.

[0096] The processor, when executing the program, further implements the following steps: determining the operation state of the refrigeration system based on the supercooling degree of the refrigerant further comprises: if the supercooling degree of the refrigerant is greater than or equal to a second preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a liquid accumulator refrigerant recovering state, controlling the first on-off valve to be in an open state and the second on-off valve to be in a closed state, and detecting whether the supercooling degree of the refrigerant is less than a fourth preset supercooling degree of the refrigerant, wherein the fourth preset supercooling degree of the refrigerant is greater than the second preset supercooling degree of the refrigerant; if the supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant, controlling the operation state of the refrigeration system to continue to be maintained as the liquid accumulator refrigerant recovering state; and if the supercooling degree of the refrigerant is less than the fourth preset supercooling degree of the refrigerant, controlling the refrigeration system to enter a refrigeration state.

[0097] The processor, when executing the program, further implements the following steps: determining the circulation amount of the refrigerant in the refrigeration system comprises: monitoring the supercooling degree of the refrigerant at the outlet of the condenser; and determining the circulation amount of the refrigerant based on the supercooling degree of the refrigerant at the outlet of the condenser.

[0098] The application further provides a computer program product, which is adapted to execute the program with the following steps when executed on a data processing device: determining the circulation amount of the refrigerant in the refrigeration system when the refrigeration system is running; determining the operation state of the refrigeration system according to the circulation amount of the refrigerant; and controlling the open states of the first on-off valve and the second on-off valve according to the operation state of the refrigeration system to adjust the circulation amount of the refrigerant in the refrigeration system.

[0099] When executed on a data processing device, the program is further adapted to execute the method steps of: determining the operation state of the refrigeration system according to the refrigerant circulation amount comprises: if it is determined that the refrigerant circulation amount is less than a first preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a liquid accumulator releasing refrigerant state; if it is determined that the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than a second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a normal refrigeration state; and if it is determined that the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, determining that the operation state of the refrigeration system is a liquid accumulator recovering refrigerant state.

[0100] When executed on a data processing device, the program is further adapted to execute the method steps of: controlling the opening state of the switch valve one and the switch valve two according to the operation state of the refrigeration system to adjust the refrigerant circulation amount in the refrigeration system comprises: if the operation state of the refrigeration system is a normal refrigeration state, controlling the switch valve one and the switch valve two to be in a closed state; if the operation state of the refrigeration system is a liquid accumulator releasing refrigerant state, controlling the switch valve one to be in a closed state and the switch valve two to be in an open state; and if the operation state of the refrigeration system is a liquid accumulator recovering refrigerant state, controlling the switch valve one to be in an open state and the switch valve two to be in a closed state.

[0101] When executed on a data processing device, the program is further adapted to execute the method steps of: the method further comprises: if the operation state of the refrigeration system is a normal refrigeration state, detecting a refrigerant supercooling degree before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and determining the operation state of the refrigeration system based on the refrigerant supercooling degree.

[0102] When executed on a data processing device, the program is further adapted to execute the method steps of: determining the operation state of the refrigeration system based on the refrigerant supercooling degree comprises: determining whether the refrigerant supercooling degree is within a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree; and when the refrigerant supercooling degree is greater than the first preset refrigerant supercooling degree and less than the second preset refrigerant supercooling degree, controlling the operation state of the refrigeration system to remain in a refrigeration state.

[0103] When executed on the data processing apparatus, the program is further adapted to perform the method steps of: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further comprises: if the refrigerant subcooling degree is less than or equal to a first preset refrigerant subcooling degree, controlling the refrigeration system to enter a liquid accumulator refrigerant releasing state, controlling the first on-off valve to be in a closed state and the second on-off valve to be in an open state, and detecting whether the refrigerant subcooling degree is greater than a third preset refrigerant subcooling degree, wherein the third preset refrigerant subcooling degree is less than the first preset refrigerant subcooling degree; if the refrigerant subcooling degree is not greater than the third preset refrigerant subcooling degree, controlling the operating state of the refrigeration system to continue to be the liquid accumulator refrigerant releasing state; and if the refrigerant subcooling degree is greater than the third preset refrigerant subcooling degree, controlling the refrigeration system to enter a refrigeration state.

[0104] When executed on the data processing apparatus, the program is further adapted to perform the method steps of: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further comprises: if the refrigerant subcooling degree is greater than or equal to a second preset refrigerant subcooling degree, controlling the refrigeration system to enter a liquid accumulator refrigerant recovering state, controlling the first on-off valve to be in an open state and the second on-off valve to be in a closed state, and detecting whether the refrigerant subcooling degree is less than a fourth preset refrigerant subcooling degree, wherein the fourth preset refrigerant subcooling degree is greater than the second preset refrigerant subcooling degree; if the refrigerant subcooling degree is not less than the fourth preset refrigerant subcooling degree, controlling the operating state of the refrigeration system to continue to be the liquid accumulator refrigerant recovering state; and if the refrigerant subcooling degree is less than the fourth preset refrigerant subcooling degree, controlling the refrigeration system to enter a refrigeration state.

[0105] When executed on the data processing apparatus, the program is further adapted to perform the method steps of: determining the refrigerant circulation amount in the refrigeration system comprises: monitoring the refrigerant subcooling degree at the outlet of the condenser; and determining the refrigerant circulation amount based on the refrigerant subcooling degree at the outlet of the condenser.

[0106] Those skilled in the art will appreciate that embodiments of the present application can be supplied as a method, a system, or a computer program product. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage media, etc.) embodying computer readable program code thereon.

[0107] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0108] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0109] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0110] In one typical configuration, the computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0111] The memory can include non-persistent memory and / or volatile memory, such as a random access memory (RAM) including a cache area for the temporary storage of data. The memory can also include non-volatile memory, such as read only memory (ROM) for storing structural information and / or instruction code to boot an operating system. Access and / or storage of information on the memory can be performed by one or more memory controllers. The memory can also include other volatile memory and / or non-volatile memory, such as flash memory, magnetic computer storage media, optical computer storage media, tape, and / or soft or hard disk drives.

[0112] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0113] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements does not only include those elements, but can also include other elements not expressly listed or inherent to such process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0114] Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system or computer program product. Accordingly, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) containing computer usable program code.

[0115] The above merely provides embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A method for adjusting the refrigerant circulation volume, characterized in that, The method is applied in a refrigeration system, which includes a liquid receiver, a condenser, a compressor, and an evaporator connected sequentially by pipelines. A bypass pipe is provided between the liquid receiver and the condenser, and a switching valve is installed on the bypass pipe. A second bypass pipe is provided between the liquid receiver and the pipeline downstream of the target expansion valve, and a second switching valve is installed on the second bypass pipe. The second switching valve has a throttling function. The target expansion valve is located on the inlet pipe of the evaporator. The method includes: During the operation of the refrigeration system, the refrigerant circulation volume in the refrigeration system is determined; The operating status of the refrigeration system is determined based on the refrigerant circulation volume; Based on the operating status of the refrigeration system, the opening states of the first and second switching valves are controlled to adjust the refrigerant circulation volume in the refrigeration system. Determining the operating status of the refrigeration system based on the refrigerant circulation volume includes: If it is determined that the refrigerant circulation volume is less than the first preset refrigerant circulation volume, then the operating state of the refrigeration system is determined to be the state of the liquid tank releasing refrigerant. If it is determined that the refrigerant circulation volume is greater than or equal to the first preset refrigerant circulation volume and less than the second preset refrigerant circulation volume, then the operating state of the refrigeration system is determined to be the refrigeration state. If the refrigerant circulation volume is determined to be greater than or equal to the second preset refrigerant circulation volume, then the operating state of the refrigeration system is determined to be the refrigerant recovery state of the liquid storage tank.

2. The method according to claim 1, characterized in that, Based on the operating status of the refrigeration system, controlling the opening states of the first and second switching valves to adjust the refrigerant circulation volume in the refrigeration system includes: If the refrigeration system is in refrigeration mode, both switch valve one and switch valve two are controlled to be in the closed state. If the refrigeration system is in the state of releasing refrigerant from the liquid storage tank, control the first switch valve to be in the closed state and the second switch valve to be in the open state; If the refrigeration system is in the state of refrigerant recovery from the liquid storage tank, the first switch valve is controlled to be in the open state and the second switch valve is controlled to be in the closed state.

3. The method according to claim 2, characterized in that, The method further includes: If the refrigeration system is in refrigeration mode, the refrigerant subcooling degree before the target expansion valve is detected, wherein the target expansion valve is installed on the inlet pipe of the evaporator; The operating status of the refrigeration system is determined based on the refrigerant subcooling.

4. The method according to claim 3, characterized in that, Determining the operating status of the refrigeration system based on the refrigerant subcooling includes: Determine whether the refrigerant subcooling is within the range of a first preset refrigerant subcooling and a second preset refrigerant subcooling, wherein the second preset refrigerant subcooling is greater than the first preset refrigerant subcooling; When the refrigerant subcooling is greater than the first preset refrigerant subcooling and less than the second preset refrigerant subcooling, the refrigeration system is controlled to maintain its operating state as a refrigeration state.

5. The method according to claim 4, characterized in that, Determining the operating status of the refrigeration system based on the refrigerant subcooling also includes: If the refrigerant subcooling is less than or equal to the first preset refrigerant subcooling, the refrigeration system is controlled to enter the refrigerant release state from the liquid storage tank, the first switch valve is controlled to be in the closed state, the second switch valve is controlled to be in the open state, and it is detected whether the refrigerant subcooling is greater than the third preset refrigerant subcooling, wherein the third preset refrigerant subcooling is less than the first preset refrigerant subcooling. If the refrigerant subcooling is not greater than the third preset refrigerant subcooling, then the operating state of the refrigeration system is controlled to continue to be the state of releasing refrigerant from the liquid storage tank. If the refrigerant subcooling degree is greater than the third preset refrigerant subcooling degree, then the refrigeration system is controlled to enter the refrigeration state.

6. The method according to claim 4 or 5, characterized in that, Determining the operating status of the refrigeration system based on the refrigerant subcooling also includes: If the refrigerant subcooling is greater than or equal to the second preset refrigerant subcooling, the refrigeration system is controlled to enter the refrigerant recovery state in the liquid storage tank, the first switch valve is controlled to be in the open state, the second switch valve is controlled to be in the closed state, and it is detected whether the refrigerant subcooling is less than the fourth preset refrigerant subcooling, wherein the fourth preset refrigerant subcooling is greater than the second preset refrigerant subcooling. If the refrigerant subcooling degree is not less than the fourth preset refrigerant subcooling degree, then the operating state of the refrigeration system is controlled to continue to be the state of refrigerant recovery from the liquid storage tank. If the refrigerant subcooling degree is less than the fourth preset refrigerant subcooling degree, then the refrigeration system is controlled to enter the refrigeration state.

7. The method according to claim 1, characterized in that, Determining the refrigerant circulation volume in the refrigeration system includes: Monitor the refrigerant subcooling at the outlet of the condenser; The refrigerant circulation rate is determined based on the refrigerant subcooling at the condenser outlet.

8. A device for regulating the amount of refrigerant circulating, characterized in that, The device is used in a refrigeration system, which includes a liquid receiver, a condenser, a compressor, and an evaporator connected sequentially by pipelines. A bypass pipe is provided between the liquid receiver and the condenser, and a switching valve is installed on the bypass pipe. A second bypass pipe is provided between the liquid receiver and the pipeline after the target expansion valve, and a second switching valve is installed on the second bypass pipe. The second switching valve has a throttling function. The target expansion valve is located on the inlet pipe of the evaporator. The device includes: The first determining unit is used to determine the amount of refrigerant circulating in the refrigeration system during operation. The second determining unit is used to determine the operating status of the refrigeration system based on the refrigerant circulation volume. The first control unit is used to control the opening state of the first switch valve and the second switch valve according to the operating state of the refrigeration system, so as to adjust the amount of refrigerant circulating in the refrigeration system. The second determining unit includes: a first processing module, configured to determine the operating state of the refrigeration system as a refrigerant release state if the refrigerant circulation amount is less than a first preset refrigerant circulation amount; a second processing module, configured to determine the operating state of the refrigeration system as a refrigeration state if the refrigerant circulation amount is greater than or equal to the first preset refrigerant circulation amount and less than a second preset refrigerant circulation amount; and a third processing module, configured to determine the operating state of the refrigeration system as a refrigerant recovery state if the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount.

9. A processor, characterized in that, The processor is used to run a program, wherein the program executes the refrigerant circulation volume adjustment method according to any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium includes a stored program, wherein the program executes the refrigerant circulation rate adjustment method according to any one of claims 1 to 7.

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