CN116182443A

CN116182443A - Refrigerant circulation quantity adjusting method and device and refrigeration system

Info

Publication number: CN116182443A
Application number: CN202111425003.6A
Authority: CN
Inventors: 刘畅; 苏国琰; 肖浩
Original assignee: Vertiv Tech Co Ltd
Current assignee: Vertiv Tech Co Ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2023-05-30
Also published as: AU2022397588A1; WO2023092866A1

Abstract

The application discloses a method and device for adjusting refrigerant circulation quantity and a refrigeration system. The method comprises the following steps: determining the refrigerant circulation quantity in a refrigeration system when the refrigeration system is in operation; determining the running state of the refrigerating system according to the circulation quantity of the refrigerant; and controlling the opening states of the first switch valve and the second switch valve according to the running state of the refrigerating system so as to regulate the refrigerant circulation quantity in the refrigerating system. Through the application, the problem of poor regulation effect on the refrigerant circulation quantity in the refrigeration system in the related art is solved.

Description

Refrigerant circulation quantity adjusting method and device and refrigeration system

Technical Field

The present invention relates to the field of information processing technologies, and in particular, to a method and an apparatus for adjusting a refrigerant circulation amount, and a refrigeration system.

Background

Along with the continuous development of a data center machine room, the volumes of various devices in the machine room are continuously reduced, and the information quantity of transmission, storage and calculation is continuously improved, so that the heat productivity density of the data center is gradually increased. In order to respond to the requirements of national energy conservation and emission reduction calls and related standards, the existing machine room is modified or newly built to gradually increase the 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 refrigerating equipment, and simultaneously improve the evaporation temperature of the unit, so that the operation energy efficiency of the compressor is higher, and the energy efficiency of the system is improved in multiple aspects.

The improvement of indoor design temperature also provides a opportunity for the natural cold utilization of the machine room. The driving force for natural cooling is derived from the indoor and outdoor temperature difference or the heat exchange between the indoor temperature and the air after the outdoor evaporative cooling, so that the natural cooling is utilized. The higher indoor temperature makes it easier to establish a higher indoor-outdoor temperature difference, so that natural cooling can be more easily utilized.

In the prior art, the natural cold utilization forms are also numerous, and each form has advantages and disadvantages. Fresh air refrigeration in the prior art is the most direct mode of natural cold utilization, but fresh air quality is difficult to control accurately, and wet load is possibly brought to a machine room, and if the fresh air is controlled accurately, investment is necessarily increased in fresh air treatment; the occupied area of the fresh air related equipment is large, and the building structure of a machine room and the like can be damaged; therefore, the computer room generally does not recommend a fresh air system. In addition, in the related art, indirect evaporation cooling is also one of utilizing natural cold sources; the air-air heat exchanger directly utilizes outdoor low-temperature air (or the outdoor air after evaporative cooling) to reduce the indoor air temperature, thereby achieving the purpose of energy conservation; however, the system has a complex structure and needs to be designed for mechanical refrigeration and cold compensation; the unit structure is complex, the heat exchanger structure is complex, and the indoor or outdoor air passage is required to be tightly sealed, so that the design production and maintenance cost is relatively high. In the related art, the heat pipe type air conditioner can effectively utilize natural cooling; the gravity heat pipe can generate refrigeration effect under indoor and outdoor temperature difference even without additional power circulation, but the power is unstable.

Therefore, it is relatively common in the related art to push the pump cycle by the refrigerant pump. When the natural cooling capacity is insufficient, the natural cooling capacity is supplemented by adding mechanical refrigeration of a compressor, and the natural cooling capacity and the mechanical refrigeration of the compressor can be combined together through the design of a system pipeline, namely, a compressor and a fluorine pump are arranged in one refrigerating system, and a pump mode is adopted when the natural cooling capacity can be utilized; in the case where the cooling capacity does not meet the heat load demand, the compressor mode is employed. The above-mentioned fluorine pump system can operate in a compressor refrigeration mode and also can operate in a fluorine pump refrigeration mode, but the two modes have very different requirements for the refrigerant, the refrigerant filling quantity required in the fluorine pump mode can be far greater than that in the compressor mode, and in order to balance the difference of the filling quantity in the two modes, the system is usually connected with a liquid storage tank in series to buffer the two differences of the refrigerant in the two modes. However, this kind of liquid storage pot can bring corresponding negative effect, one of them is that the liquid storage pot is established ties in the system, and the refrigerant of saturation state in the jar makes the supercooling degree before the valve lack under the compressor mode, and the refrigerant before the expansion valve is full of a large amount of bubbles easily, leads to the expansion valve flow area to descend on the one hand, and the ability of valve obviously attenuates, and on the other hand can make the system flow become very unstable, and the expansion valve constantly makes a round trip to adjust, leads to the condition that refrigerating system produced low pressure fluctuation to can make refrigerating system produce the liquid return, perhaps can make refrigerating system appear the risk of low pressure warning.

Aiming at the problem of poor regulation effect on the refrigerant circulation quantity in a refrigeration system in the related art, no effective solution is proposed at present.

Disclosure of Invention

The main purpose of the present application is to provide a method and a device for adjusting the circulation amount of a refrigerant, and a refrigeration system, so as to solve the problem of poor adjustment effect on the circulation amount of a refrigerant in a refrigeration system in the related art.

To achieve the above object, according to another aspect of the present application, there is provided a refrigeration system. The system comprises: the liquid storage tank, the condenser, the compressor and the evaporator are sequentially connected through pipelines; a bypass pipe I is arranged between pipelines connected with the liquid storage tank and the condenser, and a switch valve I is arranged on the bypass pipe I; a second bypass pipe is arranged between the liquid storage tank and a pipeline behind the target expansion valve, and a second switching valve is arranged on the second bypass pipe, wherein the second switching valve has a throttling function, and the target expansion valve is arranged on an inlet pipeline of the evaporator.

In order to achieve the above object, according to one aspect of the present application, there is provided a method of adjusting a refrigerant circulation amount. The method comprises the following steps: determining the refrigerant circulation quantity in the refrigerating system when the refrigerating system is in operation; determining the running state of the refrigerating system according to the refrigerant circulation quantity; and controlling the opening states of the first switch valve and the second switch valve according to the running state of the refrigerating system so as to regulate the refrigerant circulation quantity in the refrigerating system.

Further, determining the operation state of the refrigeration system according to the refrigerant circulation amount includes: if the refrigerant circulation quantity is smaller than the first preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a state that the liquid storage tank releases the refrigerant; if the refrigerant circulation quantity is larger than or equal to the first preset refrigerant circulation quantity and smaller than the second preset refrigerant circulation quantity, determining that the operation state of the refrigerating system is a refrigerating state; and if the refrigerant circulation quantity is larger than or equal to the second preset refrigerant circulation quantity, determining the running state of the refrigerating system to be the state that the liquid storage tank recovers the refrigerant.

Further, according to the operation state of the refrigeration system, controlling the opening states of the first switch valve and the second switch valve to regulate the refrigerant circulation amount in the refrigeration system includes: if the running state of the refrigerating system is a refrigerating state, controlling the first switching valve and the second switching valve to be in a closing state; if the running state of the refrigerating system is that the liquid storage tank releases the refrigerant, the first switching valve is controlled to be in a closed state, and the second switching valve is controlled to be in an open state; and if the running state of the refrigerating system is that the liquid storage tank recovers the refrigerant, controlling the first switching valve to be in an open state and controlling the second switching valve to be in a closed state.

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

Further, determining the operating state of the refrigeration system based on the refrigerant subcooling degree includes: judging whether the refrigerant supercooling degree is in a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree; and when the refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree and smaller than the second preset refrigerant supercooling degree, controlling the running state of the refrigerating system to be kept in a refrigerating state.

Further, determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is smaller than or equal to a first preset refrigerant supercooling degree, controlling the refrigerating system to enter a state that the liquid storage tank releases the refrigerant, controlling the first switching valve to be in a closed state, controlling the second switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is larger than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is smaller than the first preset refrigerant supercooling degree; if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the liquid storage tank releases the refrigerant; and if the supercooling degree of the refrigerant is larger than the third preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

Further, determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is greater than or equal to a second preset refrigerant supercooling degree, controlling the refrigerating system to enter a state of recovering the refrigerant in the liquid storage tank, controlling the first switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is smaller 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 supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the refrigerant is recovered by the liquid storage tank; and if the supercooling degree of the refrigerant is smaller than the fourth preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

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

In order to achieve the above object, according to another aspect of the present application, there is provided a refrigerant circulation amount adjusting device. The device comprises: a first determining unit for determining a refrigerant circulation amount in the refrigeration system when the refrigeration system is operated; the second determining unit is used for determining the running state of the refrigerating system according to the refrigerant circulation quantity; and the first control unit is used for controlling the opening states of the first switch valve and the second switch valve according to the running state of the refrigerating system so as to regulate the refrigerant circulation quantity in the refrigerating system.

Further, the second determining unit includes: the first processing module is used for judging that if the refrigerant circulation quantity is smaller than a first preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a state that the liquid storage tank releases the refrigerant; the second processing module is used for judging that the running state of the refrigerating system is a refrigerating state if the refrigerant circulation amount is larger than or equal to the first preset refrigerant circulation amount and smaller than the second preset refrigerant circulation amount; and the third processing module is used for judging that the running state of the refrigerating system is the state of recovering the refrigerant from the liquid storage tank if the refrigerant circulation amount is larger than or equal to the second preset refrigerant circulation amount.

Further, the first control unit includes: the first control module is used for controlling the first switching valve and the second switching valve to be in a closed state if the running state of the refrigerating system is a refrigerating state; the second control module is used for controlling the first switch valve to be in a closed state and controlling the second switch valve to be in an open state if the running state of the refrigerating system is that the liquid storage tank releases the refrigerant; and the third control module is used for controlling the first switch valve to be in an open state and controlling the second switch valve to be in a closed state if the running state of the refrigerating system is that the refrigerant is recovered from the liquid storage tank.

Further, the apparatus further comprises: the first detection unit is used for detecting the supercooling degree of the refrigerant before the target expansion valve if the running state of the refrigerating system is a refrigerating state, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and the third determining unit is used for determining the running state of the refrigerating system based on the refrigerant supercooling degree.

Further, the third determination unit includes: the first judging module is used for judging whether the refrigerant supercooling degree is in the range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree; and the fourth control module is used for controlling the running state of the refrigerating system to be kept in a refrigerating state when the supercooling degree of the refrigerant is larger than the first preset supercooling degree of the refrigerant and smaller than the second preset supercooling degree of the refrigerant.

Further, the third determining unit further includes: the fourth processing module is used for controlling the refrigerating system to enter a state of releasing the refrigerant in the liquid storage tank if the refrigerant supercooling degree is smaller than or equal to a first preset refrigerant supercooling degree, controlling the first switch valve to be in a closed state, controlling the second switch valve to be in an open state and detecting whether the refrigerant supercooling degree is larger than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is smaller than the first preset refrigerant supercooling degree; a fifth control module, configured to control the operation state of the refrigeration system to continue to be maintained in a state in which the liquid storage tank releases the refrigerant if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant; and the sixth control module is used for controlling the refrigerating system to enter a refrigerating state if the supercooling degree of the refrigerant is larger than the third preset supercooling degree of the refrigerant.

Further, the third determining unit further includes: the fifth processing module is used for controlling the refrigerating system to enter a state of recovering the refrigerant in the liquid storage tank if the refrigerant supercooling degree is larger than or equal to a second preset refrigerant supercooling degree, controlling the first switch valve to be in an open state, controlling the second switch valve to be in a close state, and detecting whether the refrigerant supercooling degree is smaller than a fourth preset refrigerant supercooling degree, wherein the fourth preset refrigerant supercooling degree is larger than the second preset refrigerant supercooling degree; a seventh control module, configured to control an operation state of the refrigeration system to continue to be maintained as a state of recovering the refrigerant in the liquid storage tank if the supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant; and the eighth control module is used for controlling the refrigerating system to enter a refrigerating state if the supercooling degree of the refrigerant is smaller than the fourth preset supercooling degree of the refrigerant.

Further, the first determination unit includes: the first monitoring module is used for monitoring the supercooling degree of the refrigerant at the outlet of the condenser; and the second determining module is used for determining the refrigerant circulation quantity based on the refrigerant supercooling degree of the condenser outlet.

In order to achieve the above object, according to another aspect of the present application, there is provided a processor for running a program, wherein the program runs to perform the method for adjusting the refrigerant circulation amount as described in any one of the above.

In order to achieve the above object, according to another aspect of the present application, there is provided a storage medium including a stored program, wherein the program, when run, performs the method of adjusting the refrigerant circulation amount as described in any one of the above.

Through the application, the following steps are adopted: determining the refrigerant circulation quantity in a refrigeration system when the refrigeration system is in operation; determining the running state of the refrigerating system according to the circulation quantity of the refrigerant; according to the running state of the refrigerating system, the opening states of the first switch valve and the second switch valve are controlled to adjust the refrigerant circulation quantity in the refrigerating system, and the problem that the refrigerant circulation quantity in the refrigerating system is poor in adjusting effect in the related art is solved. The operation state of the refrigerating system is determined according to the refrigerant circulation quantity in the refrigerating system, and the refrigerant circulation quantity in the refrigerating system can be accurately regulated by controlling the opening or closing of the first switching valve and the second switching valve according to the operation state in the refrigerating system, so that the stable operation of the refrigerating system is ensured, and the effect of regulating the refrigerant circulation quantity in the refrigerating system is further improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:

FIG. 1 is a schematic diagram of a refrigeration system provided according to an embodiment of the present application;

FIG. 2 is a flow chart of a method for adjusting the refrigerant circulation amount according to an embodiment of the present application;

FIG. 3 is a schematic view of a method for adjusting the circulation amount of a refrigerant according to an embodiment of the present application;

fig. 4 is a schematic view of a device for adjusting a refrigerant circulation amount according to an embodiment of the present application.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

According to an embodiment of the present application, a refrigeration system is provided.

Fig. 1 is a schematic diagram of a refrigeration system provided according to an embodiment of the present application. As shown in fig. 1, the system includes the following:

the liquid storage tank, the condenser, the compressor and the evaporator are sequentially connected through pipelines. A bypass pipe I is arranged between pipelines connected with the liquid storage tank and the condenser, and a switch valve I is arranged on the bypass pipe I; a bypass pipe II is arranged between the liquid storage tank and a pipeline behind the target expansion valve, and a switch valve II is arranged on the bypass pipe II, wherein the switch valve II has a throttling function, and the target expansion valve is arranged on an inlet pipeline of the evaporator.

In the refrigerating system provided by the embodiment of the application, the position of the liquid storage tank in the system is changed on the basis of a common compressor fluorine pump system, and the liquid storage tank connected in series in the system is changed into a liquid storage tank connected in parallel in the refrigerating system. Specifically, a bypass pipe I is added between the liquid storage tank and the liquid pipe (namely, a pipeline connected with the condenser), and a switch valve I is added on the bypass pipe I. In addition, a second bypass pipe is additionally arranged between the liquid storage tank and the pipeline behind the target expansion valve, and a second switching valve is additionally arranged on the second bypass pipe. It should be noted that, the target expansion valve is disposed on the inlet pipe of the evaporator, the pipe behind the target expansion valve is a low-pressure pipe, and the bypass pipe II may be added between the liquid storage tank and the air suction pipe of the compressor, or the bypass pipe II may be added between the liquid storage tank and the inlet pipe of the evaporator behind the target expansion valve. By adding the bypass channel I and the bypass channel II in the pipelines connected with the liquid storage tank, the condenser, the compressor and the evaporator, the stable operation of the refrigerating system is ensured, and the effect of adjusting the refrigerant circulation quantity in the refrigerating system is further improved.

It should be noted that fig. 1 only illustrates a schematic structure of the refrigeration system according to the embodiment of the present application, and many variations of the structure are possible. For example, a switch valve element is added in front of the compressor, a throttling element is connected with the switch valve element in parallel, and a maintenance valve element, a protection device, a sensor and other devices are added in a pipeline.

In addition, the liquid storage tank is connected in parallel in the system, the pipeline and the valve are utilized, and the pressure difference between the switch of the valve and the system is utilized, so that the technology of realizing the functions of storing, releasing, maintaining and the like of the refrigerant from the system to the liquid storage tank is also suitable for the heat pump system with different refrigerating/heating operation modes.

According to the embodiment of the application, a method for adjusting the circulation amount of the refrigerant is further provided, and the method for adjusting the circulation amount of the refrigerant provided by the embodiment of the application can be applied to the refrigerating system.

Fig. 2 is a flowchart of a method for adjusting the refrigerant circulation amount according to an embodiment of the present application. As shown in fig. 2, the method comprises the steps of:

step S101, determining a refrigerant circulation amount in the refrigeration system when the refrigeration system is in operation.

There are various ways in which the amount of refrigerant circulation in a refrigeration system can be determined, wherein, for example, the degree of supercooling of the refrigerant at the condenser outlet is monitored; and determining the refrigerant circulation amount based on the refrigerant supercooling degree of the condenser outlet. By the mode, the refrigerant circulation quantity in the refrigerating system can be accurately and rapidly obtained.

Step S102, determining the running state of the refrigerating system according to the refrigerant circulation quantity.

When the refrigerating system is in operation, the refrigerant circulation quantity is detected in real time, and whether the refrigerating system is in a state with too much refrigerant or too little refrigerant at the moment can be determined based on the refrigerant circulation quantity. The running state of the refrigerating system can be determined according to the quantity of the refrigerant circulation quantity.

Step S103, according to the running state of the refrigerating system, the opening states of the first switch valve and the second switch valve are controlled so as to regulate the refrigerant circulation quantity in the refrigerating system.

When the refrigerating system is operated, according to the operation state of the refrigerating system and by utilizing the pressure difference between the switch of the switch valve and the refrigerating system, the functions of storing, releasing, maintaining and the like of the refrigerant from the refrigerating system to the liquid storage tank can be realized, so that the circulation quantity of the refrigerant in the refrigerating system can be conveniently and rapidly regulated.

In summary, through the steps S101 to S103, the operation state of the refrigeration system is determined by using the refrigerant circulation amount in the refrigeration system, and then 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 opening and closing valves. Therefore, the stable operation of the refrigerating system can be ensured, and the effect of adjusting the refrigerant circulation quantity in the refrigerating system is further improved.

Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiment of the present application, determining the operation state of the refrigeration system according to the refrigerant circulation amount includes: if the refrigerant circulation quantity is less than the first preset refrigerant circulation quantity, determining that the operation state of the refrigeration system is a state that the liquid storage tank releases the refrigerant; if the refrigerant circulation quantity is larger than or equal to the first preset refrigerant circulation quantity and smaller than the second preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a refrigerating state; and if the refrigerant circulation quantity is larger than or equal to the second preset refrigerant circulation quantity, determining the running state of the refrigerating system to be the state of recovering the refrigerant from the liquid storage tank.

When the refrigerating system is in operation, the refrigerant circulation quantity is detected in real time, and the operation state of the refrigerating system is determined according to the detection and comparison of the refrigerant circulation quantity. For example, if the refrigerant circulation amount is smaller than the first preset refrigerant circulation amount, controlling the refrigerating system to enter the liquid storage tank to release the refrigerant until the refrigerant amount is proper; if the refrigerant circulation quantity is larger than or equal to the first preset refrigerant circulation quantity and smaller than the second preset refrigerant circulation quantity, controlling the refrigerating system to enter a refrigerating state; and if the refrigerant circulation quantity is larger than or equal to the second preset refrigerant circulation quantity, controlling the refrigerating system to enter the liquid storage tank to recover the refrigerant until the refrigerant quantity is proper.

By the scheme, the operation state of the refrigerating system can be accurately and rapidly determined according to detection and comparison of the refrigerant circulation quantity in the refrigerating system.

Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiment of the present application, according to an operation state of the refrigeration system, controlling an open state of the first switch valve and the second switch valve to adjust the refrigerant circulation amount in the refrigeration system includes: if the running state of the refrigerating system is a refrigerating state, the first switch valve and the second switch valve are controlled to be in a closed state; if the running state of the refrigerating system is that the liquid storage tank releases the refrigerant, the first switching valve is controlled to be in a closed state, and the second switching valve is controlled to be in an open state; if the running state of the refrigerating system is that the liquid storage tank recovers the refrigerant, the first control switch valve is in an open state, and the second control switch valve is in a closed state.

When the refrigerating system is in a refrigerating state, the compressor or the refrigerant pump operates normally for refrigerating, and the first switch valve and the second switch valve are controlled to be in a closed state. Therefore, the liquid storage tank and the refrigeration cycle pipeline are isolated, and the liquid storage tank does not have any influence on the refrigeration system, so that the common supercooling degree loss problem in the refrigeration system does not occur.

When the refrigerating system is in a state that the liquid storage tank releases the refrigerant, the compressor in the refrigerating system can still normally operate, and the first control switch valve is in a closed state and the second control switch valve is in an open state. At this time, the compressor in operation sucks out the refrigerant in the liquid storage tank and discharges the refrigerant into the refrigerant circulation loop of the refrigerating system so as to achieve the effect of supplementing the refrigerant into the refrigerating cycle.

When the refrigerating system is in a state that the liquid storage tank recovers the refrigerant, the compressor or the pump in the refrigerating system normally operates at the moment, and the switching valve II is controlled to be in a closed state and the switching valve I is controlled to be in an 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 condensation temperature, and because the ambient temperature is lower than the condensation temperature, the pressure in the liquid storage tank is lower than the condensation fluid pressure at the outlet of the condenser, so the refrigerant in the condenser can enter the liquid storage tank to achieve the effect of recovering the refrigerant in the liquid storage tank.

Through the scheme, the opening states of the two switching valves can be controlled respectively according to the running state of the refrigerating system, and the refrigerant circulation quantity in the refrigerating system can be conveniently and rapidly regulated, so that the stable running of the refrigerating system can be ensured, and the regulating effect on the refrigerant circulation quantity in the refrigerating system is improved.

Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiment of the present application, the method further includes: if the running state of the refrigerating system is a refrigerating state, detecting the supercooling degree of the refrigerant before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and determining the running state of the refrigerating system based on the supercooling degree of the refrigerant.

By detecting the supercooling degree of the evaporator in the refrigerating system before the expansion valve, the running state of the refrigerating system can be accurately and rapidly determined according to the detected supercooling degree of the refrigerant before the target expansion valve.

Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiment of the present application, determining the operation state of the refrigeration system based on the refrigerant supercooling degree includes: judging whether the supercooling degree of the refrigerant is in the range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree; when the supercooling degree of the refrigerant is larger than the first preset supercooling degree of the refrigerant and smaller than the second preset supercooling degree of the refrigerant, the operation state of the refrigerating system is controlled to be kept in a refrigerating state.

First, setting a lower supercooling degree limit Ta (corresponding to the first preset refrigerant supercooling degree) and an upper supercooling degree limit Tb (corresponding to the second preset refrigerant supercooling degree), 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 refrigerating system is in a refrigerating state, the supercooling degree before the expansion valve is detected in real time. And detecting whether the supercooling degree before the expansion valve is between Ta and Tb, and if so, continuously maintaining the refrigeration state.

In the above scheme, after the refrigeration system is in the refrigeration state, whether the refrigeration system is in the refrigeration state can be accurately judged by continuously monitoring whether the supercooling degree of the refrigerant is in the range of the first preset supercooling degree of the refrigerant and the second preset supercooling degree of the refrigerant.

Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiment of the present application, determining the operation state of the refrigeration system based on the refrigerant supercooling degree further includes: if the refrigerant supercooling degree is smaller than or equal to a first preset refrigerant supercooling degree, controlling the refrigerating system to enter a state that the liquid storage tank releases the refrigerant, controlling the first switching valve to be in a closed state, controlling the second switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is larger than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is smaller than the first preset refrigerant supercooling degree; if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the liquid storage tank releases the refrigerant; and if the supercooling degree of the refrigerant is larger than the third preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

If the supercooling degree of the refrigerant is not in the range of the first preset supercooling degree of the refrigerant and the second preset supercooling degree of the refrigerant, judging whether the pre-valve supercooling degree is smaller than or equal to Ta (corresponding to the first preset supercooling degree of the refrigerant), if so, indicating that the refrigerant of the refrigeration cycle is insufficient, and controlling the refrigeration system to enter a liquid storage tank release state to supplement the refrigerant in the liquid storage tank in the refrigeration cycle under the condition that the refrigeration system is possibly insufficient in liquid supply. In this state, it is continuously detected and judged whether the pre-valve supercooling degree is greater than ta+1k (corresponding to the third preset refrigerant supercooling degree described above), and it is to be noted that 1 degree is a return difference designed to maintain stability, and if the judgment result is yes, it is indicated that the refrigerant is sufficient, and the refrigeration system is controlled to enter the refrigeration state. If the judgment result is negative, the refrigerant is insufficient, and the refrigerating system still needs to be kept in the releasing state of the liquid storage tank.

In the scheme, after the refrigeration system is in the refrigeration state, the supercooling degree of the refrigerant is continuously monitored, and the running state of the refrigeration system is adjusted in real time according to the supercooling degree of the refrigerant, so that the stable running of the refrigeration system is ensured, and the effect of adjusting the circulation quantity of the refrigerant in the refrigeration system is further improved.

Optionally, in the method for adjusting the refrigerant circulation amount provided in the embodiment of the present application, determining the operation state of the refrigeration system based on the refrigerant supercooling degree further includes: if the refrigerant supercooling degree is greater than or equal to a second preset refrigerant supercooling degree, controlling the refrigerating system to enter a state of recovering the refrigerant in the liquid storage tank, controlling the first switching valve to be in an open state, controlling the second switching valve to be in a close state, and detecting whether the refrigerant supercooling degree is smaller 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 supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept as the state of recovering the refrigerant in the liquid storage tank; and if the supercooling degree of the refrigerant is smaller than the fourth preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

Judging whether the pre-valve supercooling degree is greater than or equal to Tb (corresponding to the second preset refrigerant supercooling degree), if so, the fact that the refrigerant in the refrigeration cycle is too much and the effective heat exchange area of the condenser is insufficient, so that the system enters a liquid storage tank recovery state, namely, the refrigerant in the liquid storage tank is discharged into the liquid storage tank. In this state, whether the pre-valve supercooling degree is smaller than Tb-1K (corresponding to the fourth preset refrigerant supercooling degree) is continuously detected and judged, and it is to be noted that 1 degree is a return difference designed for maintaining stability, and if the judgment result is yes, it is noted that the refrigerant amount is not excessive, and the refrigerating system is controlled to enter the refrigerating state. If the judgment result is negative, the refrigerant quantity is excessive, and the refrigeration system still needs to be kept in the liquid storage tank recovery state.

A control flow diagram of the refrigeration system in a refrigerated state is shown in fig. 3. The first preset refrigerant supercooling degree is Ta in the diagram, the second preset refrigerant supercooling degree is Tb in the diagram, the third preset refrigerant supercooling degree is Ta+1K in the diagram, and the fourth preset refrigerant supercooling degree is Tb-1K in the diagram.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.

The embodiment of the application also provides a device for adjusting the circulation amount of the refrigerant, and it should be noted that the device for adjusting the circulation amount of the refrigerant in the embodiment of the application can be used for executing the method for adjusting the circulation amount of the refrigerant provided in the embodiment of the application. The following describes a device for adjusting the circulation amount of the refrigerant provided in the embodiment of the present application.

Fig. 4 is a schematic view of a refrigerant circulation amount adjusting device according to an embodiment of the present application. As shown in fig. 4, the apparatus includes: a first determination unit 401, a second determination unit 402, and a first control unit 403.

Specifically, the first determining unit 401 is configured to determine a refrigerant circulation amount in the refrigeration system when the refrigeration system is in operation;

a second determining unit 402 for determining an operation state of the refrigeration system according to the refrigerant circulation amount;

the first control unit 403 is configured to control the opening states of the first switch valve and the second switch valve according to the operation state of the refrigeration system, so as to adjust the refrigerant circulation amount in the refrigeration system.

In summary, in the refrigerant circulation amount adjusting device provided in the embodiment of the present application, when the refrigeration system operates, the refrigerant circulation amount in the refrigeration system is determined by the first determining unit 401; the second determining unit 402 determines an operation state of the refrigeration system according to the refrigerant circulation amount; the first control unit 403 controls the opening states of the first switch valve and the second switch valve according to the operation state of the refrigeration system, so as to adjust the refrigerant circulation amount in the refrigeration system, solve the problem of poor adjustment effect on the refrigerant circulation amount in the refrigeration system in the related art, determine the operation state of the refrigeration system according to the refrigerant circulation amount in the refrigeration system, and accurately adjust the refrigerant circulation amount in the refrigeration system by controlling the opening or closing of the first switch valve and the second switch valve according to the operation state of the refrigeration system, thereby ensuring the stable operation of the refrigeration system and further improving the adjustment effect on the refrigerant circulation amount in the refrigeration system.

Optionally, in the adjusting device for refrigerant circulation amount provided in the embodiment of the present application, the second determining unit includes: the first processing module is used for judging that if the refrigerant circulation quantity is smaller than a first preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a state that the liquid storage tank releases the refrigerant; the second processing module is used for judging that the running state of the refrigerating system is a refrigerating state if the refrigerant circulation amount is larger than or equal to the first preset refrigerant circulation amount and smaller than the second preset refrigerant circulation amount; and the third processing module is used for judging that the running state of the refrigerating system is the state of recovering the refrigerant from the liquid storage tank if the refrigerant circulation amount is larger than or equal to the second preset refrigerant circulation amount.

Optionally, in the apparatus for adjusting a refrigerant circulation amount provided in the embodiment of the present application, the first control unit includes: the first control module is used for controlling the first switch valve and the second switch valve to be in a closed state if the running state of the refrigerating system is a refrigerating state; the second control module is used for controlling the first switching valve to be in a closed state and the second switching valve to be in an open state if the running state of the refrigerating system is that the liquid storage tank releases the refrigerant; and the third control module is used for controlling the first switching valve to be in an open state and the second switching valve to be in a closed state if the running state of the refrigerating system is that the refrigerant is recovered from the liquid storage tank.

Optionally, in the device for adjusting the circulation amount of the refrigerant provided in the embodiment of the present application, the device further includes: the first detection unit is used for detecting the supercooling degree of the refrigerant before the target expansion valve if the running state of the refrigerating system is a refrigerating state, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and the third determining unit is used for determining the running state of the refrigerating system based on the supercooling degree of the refrigerant.

Optionally, in the adjusting device for refrigerant circulation amount provided in the embodiment of the present application, the third determining unit includes: the first judging module is used for judging whether the refrigerant supercooling degree is in the range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree; and the fourth control module is used for controlling the running state of the refrigerating system to be kept in a refrigerating state when the supercooling degree of the refrigerant is larger than the first preset supercooling degree of the refrigerant and smaller than the second preset supercooling degree of the refrigerant.

Optionally, in the adjusting device for refrigerant circulation amount provided in the embodiment of the present application, the third determining unit further includes: the fourth processing module is used for controlling the refrigerating system to enter a state of releasing the refrigerant in the liquid storage tank if the refrigerant supercooling degree is smaller than or equal to a first preset refrigerant supercooling degree, controlling the first switch valve to be in a closed state, controlling the second switch valve to be in an open state and detecting whether the refrigerant supercooling degree is larger than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is smaller than the first preset refrigerant supercooling degree; a fifth control module, configured to control the operation state of the refrigeration system to continue to be maintained in a state in which the liquid storage tank releases the refrigerant if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant; and the sixth control module is used for controlling the refrigerating system to enter a refrigerating state if the supercooling degree of the refrigerant is larger than the third preset supercooling degree of the refrigerant.

Optionally, in the adjusting device for refrigerant circulation amount provided in the embodiment of the present application, the third determining unit further includes: the fifth processing module is used for controlling the refrigerating system to enter a state of recovering the refrigerant in the liquid storage tank if the refrigerant supercooling degree is larger than or equal to a second preset refrigerant supercooling degree, controlling the first switch valve to be in an open state, controlling the second switch valve to be in a close state, and detecting whether the refrigerant supercooling degree is smaller than a fourth preset refrigerant supercooling degree, wherein the fourth preset refrigerant supercooling degree is larger than the second preset refrigerant supercooling degree; a seventh control module, configured to control an operation state of the refrigeration system to continue to be maintained as a state of recovering the refrigerant in the liquid storage tank if the supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant; and the eighth control module is used for controlling the refrigerating system to enter a refrigerating state if the supercooling degree of the refrigerant is smaller than the fourth preset supercooling degree of the refrigerant.

Optionally, in the adjusting device for refrigerant circulation amount provided in the embodiment of the present application, the first determining unit includes: the first monitoring module is used for monitoring the supercooling degree of the refrigerant at the outlet of the condenser; and the second determining module is used for determining the refrigerant circulation quantity based on the refrigerant supercooling degree of the outlet of the condenser.

The refrigerant circulation amount adjusting device includes a processor and a memory, the first determining unit 401, the second determining unit 402, the first control unit 403, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one, and the effect of adjusting the refrigerant circulation quantity in the refrigerating system is realized by adjusting the inner core parameters.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.

The embodiment of the invention provides a storage medium, wherein a program is stored on the storage medium, and the program realizes the method for regulating the refrigerant circulation quantity when being executed by a processor.

The embodiment of the invention provides a processor which is used for running a program, wherein the program runs to execute the method for regulating the circulation quantity of the refrigerant.

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes the following steps when executing the program: determining the refrigerant circulation quantity in the refrigerating system when the refrigerating system is in operation; determining the running state of the refrigerating system according to the refrigerant circulation quantity; and controlling the opening states of the first switch valve and the second switch valve according to the running state of the refrigerating system so as to regulate the refrigerant circulation quantity in the refrigerating system.

The processor also realizes the following steps when executing the program: determining the operation state of the refrigeration system according to the refrigerant circulation quantity comprises: if the refrigerant circulation quantity is smaller than the first preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a state that the liquid storage tank releases the refrigerant; if the refrigerant circulation quantity is larger than or equal to the first preset refrigerant circulation quantity and smaller than the second preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a common refrigerating state; and if the refrigerant circulation quantity is larger than or equal to the second preset refrigerant circulation quantity, determining the running state of the refrigerating system to be the state that the liquid storage tank recovers the refrigerant.

The processor also realizes the following steps when executing the program: according to the operation state of the refrigerating system, controlling the opening states of the first switch valve and the second switch valve to regulate the refrigerant circulation amount in the refrigerating system comprises: if the running state of the refrigerating system is a common refrigerating state, controlling the first switching valve and the second switching valve to be in a closed state; if the running state of the refrigerating system is that the liquid storage tank releases the refrigerant, the first switching valve is controlled to be in a closed state, and the second switching valve is controlled to be in an open state; and if the running state of the refrigerating system is that the liquid storage tank recovers the refrigerant, controlling the first switching valve to be in an open state and controlling the second switching valve to be in a closed state.

The processor also realizes the following steps when executing the program: the method further comprises the steps of: if the running state of the refrigerating system is a common refrigerating state, detecting the supercooling degree of the refrigerant before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and determining the running state of the refrigerating system based on the refrigerant supercooling degree.

The processor also realizes the following steps when executing the program: determining the operating state of the refrigeration system based on the refrigerant subcooling degree includes: judging whether the refrigerant supercooling degree is in a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree; and when the refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree and smaller than the second preset refrigerant supercooling degree, controlling the running state of the refrigerating system to be kept in a refrigerating state.

The processor also realizes the following steps when executing the program: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is smaller than or equal to a first preset refrigerant supercooling degree, controlling the refrigerating system to enter a state that the liquid storage tank releases the refrigerant, controlling the first switching valve to be in a closed state, controlling the second switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is larger than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is smaller than the first preset refrigerant supercooling degree; if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the liquid storage tank releases the refrigerant; and if the supercooling degree of the refrigerant is larger than the third preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

The processor also realizes the following steps when executing the program: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is greater than or equal to a second preset refrigerant supercooling degree, controlling the refrigerating system to enter a state of recovering the refrigerant in the liquid storage tank, controlling the first switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is smaller 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 supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the refrigerant is recovered by the liquid storage tank; and if the supercooling degree of the refrigerant is smaller than the fourth preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

The processor also realizes the following steps when executing the program: determining a refrigerant circulation amount in the refrigeration system includes: monitoring the supercooling degree of the refrigerant at the outlet of the condenser; and determining the refrigerant circulation amount based on the refrigerant supercooling degree of the condenser outlet.

The present application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of: determining the refrigerant circulation quantity in the refrigerating system when the refrigerating system is in operation; determining the running state of the refrigerating system according to the refrigerant circulation quantity; and controlling the opening states of the first switch valve and the second switch valve according to the running state of the refrigerating system so as to regulate the refrigerant circulation quantity in the refrigerating system.

When executed on a data processing device, is further adapted to carry out a program initialized with the method steps of: determining the operation state of the refrigeration system according to the refrigerant circulation quantity comprises: if the refrigerant circulation quantity is smaller than the first preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a state that the liquid storage tank releases the refrigerant; if the refrigerant circulation quantity is larger than or equal to the first preset refrigerant circulation quantity and smaller than the second preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a common refrigerating state; and if the refrigerant circulation quantity is larger than or equal to the second preset refrigerant circulation quantity, determining the running state of the refrigerating system to be the state that the liquid storage tank recovers the refrigerant.

When executed on a data processing device, is further adapted to carry out a program initialized with the method steps of: according to the operation state of the refrigerating system, controlling the opening states of the first switch valve and the second switch valve to regulate the refrigerant circulation amount in the refrigerating system comprises: if the running state of the refrigerating system is a common refrigerating state, controlling the first switching valve and the second switching valve to be in a closed state; if the running state of the refrigerating system is that the liquid storage tank releases the refrigerant, the first switching valve is controlled to be in a closed state, and the second switching valve is controlled to be in an open state; and if the running state of the refrigerating system is that the liquid storage tank recovers the refrigerant, controlling the first switching valve to be in an open state and controlling the second switching valve to be in a closed state.

When executed on a data processing device, is further adapted to carry out a program initialized with the method steps of: the method further comprises the steps of: if the running state of the refrigerating system is a common refrigerating state, detecting the supercooling degree of the refrigerant before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator; and determining the running state of the refrigerating system based on the refrigerant supercooling degree.

When executed on a data processing device, is further adapted to carry out a program initialized with the method steps of: determining the operating state of the refrigeration system based on the refrigerant subcooling degree includes: judging whether the refrigerant supercooling degree is in a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree; and when the refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree and smaller than the second preset refrigerant supercooling degree, controlling the running state of the refrigerating system to be kept in a refrigerating state.

When executed on a data processing device, is further adapted to carry out a program initialized with the method steps of: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is smaller than or equal to a first preset refrigerant supercooling degree, controlling the refrigerating system to enter a state that the liquid storage tank releases the refrigerant, controlling the first switching valve to be in a closed state, controlling the second switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is larger than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is smaller than the first preset refrigerant supercooling degree; if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the liquid storage tank releases the refrigerant; and if the supercooling degree of the refrigerant is larger than the third preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

When executed on a data processing device, is further adapted to carry out a program initialized with the method steps of: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is greater than or equal to a second preset refrigerant supercooling degree, controlling the refrigerating system to enter a state of recovering the refrigerant in the liquid storage tank, controlling the first switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is smaller 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 supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the refrigerant is recovered by the liquid storage tank; and if the supercooling degree of the refrigerant is smaller than the fourth preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

When executed on a data processing device, is further adapted to carry out a program initialized with the method steps of: determining a refrigerant circulation amount in the refrigeration system includes: monitoring the supercooling degree of the refrigerant at the outlet of the condenser; and determining the refrigerant circulation amount based on the refrigerant supercooling degree of the condenser outlet.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may 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 flow or flows and/or block diagram block or blocks.

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

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer 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 technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that the terms "comprises," "comprising," or any other variation 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 include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. A refrigeration system, comprising:

the liquid storage tank, the condenser, the compressor and the evaporator are sequentially connected through pipelines;

a bypass pipe I is arranged between pipelines connected with the liquid storage tank and the condenser, and a switch valve I is arranged on the bypass pipe I; a second bypass pipe is arranged between the liquid storage tank and a pipeline behind the target expansion valve, and a second switching valve is arranged on the second bypass pipe, wherein the second switching valve has a throttling function, and the target expansion valve is arranged on an inlet pipeline of the evaporator.

2. A method for adjusting the circulation amount of a refrigerant, wherein the method is applied to the refrigeration system according to claim 1, and comprises the steps of:

determining the refrigerant circulation quantity in the refrigerating system when the refrigerating system is in operation;

determining the running state of the refrigerating system according to the refrigerant circulation quantity;

and controlling the opening states of the first switch valve and the second switch valve according to the running state of the refrigerating system so as to regulate the refrigerant circulation quantity in the refrigerating system.

3. The method of claim 2, wherein determining the operating condition of the refrigeration system based on the refrigerant circulation amount comprises:

if the refrigerant circulation quantity is smaller than the first preset refrigerant circulation quantity, determining that the running state of the refrigerating system is a state that the liquid storage tank releases the refrigerant;

if the refrigerant circulation quantity is larger than or equal to the first preset refrigerant circulation quantity and smaller than the second preset refrigerant circulation quantity, determining that the operation state of the refrigerating system is a refrigerating state;

and if the refrigerant circulation quantity is larger than or equal to the second preset refrigerant circulation quantity, determining the running state of the refrigerating system to be the state that the liquid storage tank recovers the refrigerant.

4. The method of claim 2, wherein controlling the open states of the first and second switching valves to adjust the refrigerant circulation amount in the refrigeration system according to the operation state of the refrigeration system comprises:

if the running state of the refrigerating system is a refrigerating state, controlling the first switching valve and the second switching valve to be in a closing state;

if the running state of the refrigerating system is that the liquid storage tank releases the refrigerant, the first switching valve is controlled to be in a closed state, and the second switching valve is controlled to be in an open state;

and if the running state of the refrigerating system is that the liquid storage tank recovers the refrigerant, controlling the first switching valve to be in an open state and controlling the second switching valve to be in a closed state.

5. The method according to claim 4, wherein the method further comprises:

if the running state of the refrigerating system is a refrigerating state, detecting the supercooling degree of the refrigerant before a target expansion valve, wherein the target expansion valve is arranged on an inlet pipeline of the evaporator;

and determining the running state of the refrigerating system based on the refrigerant supercooling degree.

6. The method of claim 5, wherein determining an operating state of the refrigeration system based on the refrigerant subcooling degree comprises:

Judging whether the refrigerant supercooling degree is in a range of a first preset refrigerant supercooling degree and a second preset refrigerant supercooling degree, wherein the second preset refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree;

and when the refrigerant supercooling degree is larger than the first preset refrigerant supercooling degree and smaller than the second preset refrigerant supercooling degree, controlling the running state of the refrigerating system to be kept in a refrigerating state.

7. The method of claim 6, wherein determining an operating condition of the refrigeration system based on the refrigerant subcooling degree further comprises:

if the refrigerant supercooling degree is smaller than or equal to a first preset refrigerant supercooling degree, controlling the refrigerating system to enter a state that the liquid storage tank releases the refrigerant, controlling the first switching valve to be in a closed state, controlling the second switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is larger than a third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree is smaller than the first preset refrigerant supercooling degree;

if the supercooling degree of the refrigerant is not greater than the third preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the liquid storage tank releases the refrigerant;

And if the supercooling degree of the refrigerant is larger than the third preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

8. The method of claim 6 or 7, wherein determining an operating condition of the refrigeration system based on the refrigerant subcooling degree further comprises:

if the refrigerant supercooling degree is greater than or equal to a second preset refrigerant supercooling degree, controlling the refrigerating system to enter a state of recovering the refrigerant in the liquid storage tank, controlling the first switching valve to be in an open state, and detecting whether the refrigerant supercooling degree is smaller 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 supercooling degree of the refrigerant is not less than the fourth preset supercooling degree of the refrigerant, controlling the running state of the refrigerating system to be kept in a state that the refrigerant is recovered by the liquid storage tank;

and if the supercooling degree of the refrigerant is smaller than the fourth preset supercooling degree of the refrigerant, controlling the refrigerating system to enter a refrigerating state.

9. The method of claim 2, wherein determining an amount of refrigerant circulation in the refrigeration system comprises:

monitoring the supercooling degree of the refrigerant at the outlet of the condenser;

And determining the refrigerant circulation amount based on the refrigerant supercooling degree of the condenser outlet.

10. A refrigerant circulation amount adjusting device, wherein the device is applied to the refrigeration system according to claim 1, and comprises:

a first determining unit for determining a refrigerant circulation amount in the refrigeration system when the refrigeration system is operated;

the second determining unit is used for determining the running state of the refrigerating system according to the refrigerant circulation quantity;

and the first control unit is used for controlling the opening states of the first switch valve and the second switch valve according to the running state of the refrigerating system so as to regulate the refrigerant circulation quantity in the refrigerating system.

11. A processor for running a program, wherein the program runs to execute the method for adjusting the refrigerant circulation amount according to any one of claims 2 to 9.

12. A storage medium comprising a stored program, wherein the program performs the method for adjusting the refrigerant circulation amount according to any one of claims 2 to 9.