WO2023092866A1

WO2023092866A1 - Refrigerant circulation amount adjusting method and apparatus, and refrigeration system

Info

Publication number: WO2023092866A1
Application number: PCT/CN2022/076588
Authority: WO
Inventors: 刘畅; 苏国琰; 肖浩
Original assignee: 维谛技术有限公司
Priority date: 2021-11-26
Filing date: 2022-02-17
Publication date: 2023-06-01
Also published as: AU2022397588A1; CN116182443A

Abstract

A refrigerant circulation amount adjusting method and apparatus, and a refrigeration system. The method comprises: during operation of a refrigeration system, determining the circulation amount of a refrigerant in the refrigeration system; determining the operating state of the refrigeration system according to the circulation amount of the refrigerant; and controlling the opening and closing state of a first on-off valve and a second on-off valve according to the operating state of the refrigeration system, so as to adjust the circulation amount of the refrigerant in the refrigeration system.

Description

Method and device for adjusting refrigerant circulation volume, refrigeration system

This application claims the priority of the Chinese patent application with the application number 202111425003.6 and the title of the invention "method and device for adjusting refrigerant circulation volume, refrigeration system" submitted to the China Patent Office on November 26, 2021, the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the technical field of information processing, and in particular, relates to a method and device for adjusting refrigerant circulation volume, and a refrigeration system.

Background technique

With the continuous development of the data center computer room, the volume of various equipment in the computer room is continuously reduced, and the amount of information transmitted, stored and calculated is continuously increasing, so the heat generation density of the data center is also gradually increasing. In response to the national call for energy conservation and emission reduction and the requirements of relevant standards, the renovation of existing computer rooms or the construction of new computer rooms are gradually increasing their interior design temperature. Under the same heat load, an increase in the indoor design temperature can increase the cooling capacity of the single compressor, reduce the investment in refrigeration equipment, and also increase the evaporation temperature of the unit, making the compressor more energy efficient, thus improving the system in many ways. energy efficiency.

The increase in indoor design temperature also provides an opportunity for the natural cooling of the computer room. The driving force of natural cooling utilization comes from the indoor and outdoor temperature difference or the heat exchange between indoor temperature and outdoor evaporatively cooled air, so as to utilize natural cooling. Higher indoor temperatures make it easier to establish a higher indoor-outdoor temperature difference, which makes it easier to take advantage of natural cooling.

In the current related technologies, there are many forms of natural cooling utilization, each with its own advantages and disadvantages. Fresh air cooling in related technologies is the most direct way to utilize natural cooling, but it is difficult to accurately control the quality of fresh air, and it may also bring humidity load to the computer room. If it is accurately controlled, it is necessary to increase investment in fresh air treatment; and fresh air related equipment It occupies a large area and will damage the building structure of the computer room; therefore, it is generally not recommended to use fresh air systems in computer rooms. In addition, in the current related technologies, indirect evaporative cooling is also a kind of natural cold source; it directly uses outdoor low-temperature air (or outdoor air after evaporative cooling) to reduce the indoor air temperature through an air-to-air heat exchanger, thereby achieving The purpose of energy saving; however, the structure of this system is complex, and mechanical refrigeration supplementary cooling needs to be designed; the structure of the unit is complex, the structure of the heat exchanger is complex, and the indoor or outdoor air path requires strict sealing, so the design, production and maintenance costs are relatively high. In the current related technologies, heat pipe air conditioners can also effectively use natural cooling; gravity heat pipes can produce cooling effects under indoor and outdoor temperature differences without even requiring an additional power cycle, but the power is unstable.

Therefore, it is more commonly used in the related art at present to drive the pump to circulate through the refrigerant pump. When the natural cooling capacity is not enough, it should be supplemented by increasing the mechanical refrigeration of the compressor. Through the design of the system pipeline, the two can be combined together, that is, a refrigeration system has both a compressor and a fluorine pump. The pump mode is used when the natural cold source is used; when the cooling capacity does not meet the heat load demand, the compressor mode is used. The above-mentioned fluorine pump system can operate in the compressor refrigeration mode or in the fluorine pump refrigeration mode, but the demand for refrigerant in these two modes is very different, and the refrigerant charge required in the fluorine pump mode will be much larger In the compressor mode, in order to balance the difference in the charging amount of the two modes, this system usually connects a liquid storage tank to buffer the difference of the refrigerant in the two modes. However, this liquid storage tank will bring corresponding negative effects. One is that the liquid storage tank is connected in series in the system. The saturated refrigerant in the tank will cause the lack of subcooling before the valve in compressor mode, and the refrigerant in front of the expansion valve will easily Filled with a large number of air bubbles, on the one hand, the flow area of the expansion valve will decrease, and the capacity of the valve will decrease significantly; As a result, liquid return will occur in the refrigeration system, or the risk of low pressure alarm in the refrigeration system will occur.

Aiming at the problem in the related art that the adjustment effect of the refrigerant circulation volume in the refrigeration system is not good, no effective solution has been proposed yet.

Contents of the invention

The main purpose of the present application is to provide a method and device for adjusting the amount of refrigerant circulation, and a refrigeration system, so as to solve the problem in the related art that the adjustment effect of the refrigerant circulation amount in the refrigeration system is not good.

In order to achieve the above purpose, according to another aspect of the present application, a refrigeration system is provided. The system includes: a liquid storage tank, a condenser, a compressor, and an evaporator connected in sequence through pipelines; wherein, a bypass pipe 1 is set between the pipeline connected to the liquid storage tank and the condenser, and the A switch valve 1 is set on the bypass tube 1; a bypass tube 2 is set between the liquid storage tank and the pipeline behind the target expansion valve, and a switch valve 2 is set on the bypass tube 2, wherein the switch The second valve has a throttling function, and the target expansion valve is set on the inlet pipeline of the evaporator.

In order to achieve the above purpose, according to one aspect of the present application, a method for adjusting the amount of refrigerant circulation is provided. The method includes: when the refrigeration system is running, determining the refrigerant circulation amount in the refrigeration system; determining the operating state of the refrigeration system according to the refrigerant circulation amount; and controlling the refrigeration system according to the operating state of the refrigeration system. Switching the opening states of the switching valve 1 and the switching valve 2 is used to adjust the circulation amount of the refrigerant in the refrigeration system.

Further, determining the operating state of the refrigeration system according to the amount of refrigerant circulation includes: if it is judged that the amount of refrigerant circulation is less than a first preset amount of refrigerant circulation, then determining that the operating state of the refrigeration system is that the liquid storage tank releases the refrigerant 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 the second preset refrigerant circulation amount, then it is determined that the operating state of the refrigeration system is a cooling state; if it is judged that the refrigerant circulation If the amount is greater than or equal to the second preset refrigerant circulation amount, it is determined that the operating state of the refrigeration system is the state of recovering refrigerant from the liquid storage tank.

Further, according to the operating state of the refrigeration system, controlling the opening states of the on-off valve 1 and the on-off valve 2 to adjust the circulation amount of refrigerant in the refrigeration system includes: if the operation of the refrigeration system If the state is cooling state, control the switch valve 1 and the switch valve 2 to be in the closed state; if the operation state of the refrigeration system is the liquid storage tank releases the refrigerant state, control the switch valve 1 to be in the closed state, the The switch valve 2 is in the open state; if the operation state of the refrigeration system is the liquid storage tank recovering refrigerant, the switch valve 1 is controlled to be in the open state, and the switch valve 2 is in the closed state.

Further, the method further includes: if the operating state of the refrigeration system is a cooling state, detecting the subcooling degree of the refrigerant before the target expansion valve, wherein the target expansion valve is arranged on the inlet pipeline of the evaporator ; Determine the operating state of the refrigeration system based on the subcooling degree of the refrigerant.

Further, determining the operating state of the refrigeration system based on the refrigerant subcooling degree includes: judging whether the refrigerant supercooling degree is within the range of the first preset refrigerant subcooling degree and the second preset refrigerant subcooling degree, Wherein, the second preset refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree; when the refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree and less than the second preset refrigerant When the subcooling degree of the refrigerant is set, the operation state of the refrigeration system is controlled to maintain the refrigeration state.

Further, determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is less than or equal to a first preset refrigerant subcooling degree, controlling the refrigeration system to enter the liquid storage tank to release the refrigerant State, control the switch valve 1 to be in the closed state, the switch valve 2 to be in the open state, and detect whether the refrigerant supercooling degree is greater than the third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree The cooling 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, then control the operation state of the refrigeration system to continue to keep the liquid storage tank released Refrigerant state: if the refrigerant subcooling degree is greater than the third preset refrigerant subcooling degree, control the refrigeration system to enter the cooling 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 subcooling degree, controlling the refrigeration system to enter the liquid storage tank to recover the refrigerant State, control the switching valve 1 to be in the open state, the switching valve 2 to be in the closed state, and detect whether the refrigerant supercooling degree is less than the fourth preset refrigerant supercooling degree, wherein the fourth preset refrigerant supercooling degree The cooling 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, then the operating state of the refrigeration system is controlled to continue to be liquid storage tank recovery Refrigerant state: if the refrigerant subcooling degree is less than the fourth preset refrigerant subcooling degree, control the refrigeration system to enter the cooling state.

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

In order to achieve the above object, according to another aspect of the present application, a device for adjusting the amount of refrigerant circulation is provided. The device includes: a first determination unit, configured to determine the amount of refrigerant circulation in the refrigeration system when the refrigeration system is running; a second determination unit, configured to determine the operation of the refrigeration system according to the amount of refrigerant circulation State: a first control unit, configured to control the opening states of the on-off valve 1 and the on-off valve 2 according to the operating state of the refrigerating system, so as to adjust the amount of refrigerant circulation in the refrigerating system.

Further, the second determination unit includes: a first processing module, configured to determine that if the refrigerant circulation amount is less than a first preset refrigerant circulation amount, then determine that the operating state of the refrigeration system is the refrigerant release state of the liquid storage tank ; A second processing module, configured to determine that 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, then determine that the refrigeration system is in a cooling state; The third processing module is configured to determine that if the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, then determine that the operation state of the refrigeration system is a state of recovering refrigerant from a liquid storage tank.

Further, the first control unit includes: a first control module, configured to control both the on-off valve 1 and the on-off valve 2 to be closed if the operating state of the refrigeration system is a cooling state; module, used to control the on-off valve one to be closed and the on-off valve two to be opened if the operating state of the refrigeration system is the liquid storage tank releasing refrigerant; the third control module is used to control The operating state of the system is the state where the liquid storage tank is recovering refrigerant, and the switch valve 1 is controlled to be in the open state, and the switch valve 2 is controlled to be in the closed state.

Further, the device further includes: a first detection unit, configured to detect the subcooling degree of the refrigerant before the target expansion valve if the operating state of the refrigeration system is a cooling state, wherein the target expansion valve is set at the On the inlet pipeline of the evaporator; a third determining unit, configured to determine the operating state of the refrigeration system based on the subcooling degree of the refrigerant.

Further, the third determination unit includes: a first judging module, configured to judge whether the degree of subcooling of the refrigerant is within the range of the first preset degree of subcooling of the refrigerant and the second preset degree of subcooling of the refrigerant, wherein, The second preset refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree; the fourth control module is used for when the refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree and less than When the second preset refrigerant subcooling degree is reached, the operating state of the refrigeration system is controlled to remain in a cooling state.

Further, the third determination unit further includes: a fourth processing module, configured to control the refrigeration system to enter the state of releasing the refrigerant from the liquid storage tank if the refrigerant subcooling degree is less than or equal to the first preset refrigerant subcooling degree, Control the switch valve 1 to be in the closed state, the switch valve 2 to be in the 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 less than the first preset refrigerant subcooling degree; the fifth control module is used to control the operation state of the refrigeration system to continue to maintain if the refrigerant subcooling degree is not greater than the third preset refrigerant subcooling degree The liquid storage tank releases the refrigerant state; the sixth control module is configured to control the refrigeration system to enter the cooling state if the refrigerant subcooling degree is greater than the third preset refrigerant subcooling degree.

Further, the third determination unit further includes: a fifth processing module, configured to control the refrigeration system to enter the state of recovering refrigerant from the liquid storage tank if the refrigerant subcooling degree is greater than or equal to the second preset refrigerant subcooling degree, Control the switch valve one to be in the open state, the switch valve two to be in the 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 greater than the second preset refrigerant subcooling degree; the seventh control module is used to control the operation state of the refrigeration system to continue to maintain if the refrigerant subcooling degree is not less than the fourth preset refrigerant subcooling degree The state of recovering refrigerant for the liquid storage tank; the eighth control module is used to control the refrigeration system to enter the cooling state if the degree of subcooling of the refrigerant is less than the fourth preset degree of subcooling of the refrigerant.

Further, the first determining unit includes: a first monitoring module, configured to monitor the subcooling degree of the refrigerant at the outlet of the condenser; a second determining module, configured to determine based on the subcooling degree of the refrigerant at the outlet of the condenser The refrigerant circulation volume.

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

In order to achieve the above object, according to another aspect of the present application, a storage medium is provided, the storage medium includes a stored program, wherein, when the program is running, the adjustment of the refrigerant circulation amount described in any one of the above is performed method.

Through this application, the following steps are adopted: when the refrigeration system is running, determine the refrigerant circulation amount in the refrigeration system; determine the operating state of the refrigeration system according to the refrigerant circulation amount; control the on-off valve 1 and the on-off valve according to the operating state of the refrigeration system The open state of the two is used to adjust the refrigerant circulation amount in the refrigeration system, which solves the problem of poor adjustment effect on the refrigerant circulation amount in the refrigeration system in the related art. The operating state of the refrigeration system is determined according to the amount of refrigerant circulation in the refrigeration system, and the refrigerant circulation in the refrigeration system can be accurately controlled by controlling the opening or closing of the switching valve 1 and the switching valve 2 according to the operating state of the refrigeration system. The amount is adjusted to ensure the stable operation of the refrigeration system, thereby improving the effect of adjusting the refrigerant circulation in the refrigeration system.

Description of drawings

The drawings constituting a part of the application are used to provide further understanding of the application, and the schematic embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation to the application. In the attached picture:

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 amount of refrigerant circulation provided according to an embodiment of the present application;

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

Fig. 4 is a schematic diagram of a device for adjusting the amount of refrigerant circulation provided according to an embodiment of the present application.

Detailed ways

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

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for the embodiments of the application described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product 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 Figure 1, the system includes the following:

A liquid storage tank, a condenser, a compressor and an evaporator connected in sequence by pipelines. Among them, a bypass pipe 1 is set between the pipeline connected to the liquid storage tank and the condenser, and a switch valve 1 is set on the bypass pipe 1; a bypass pipe is set between the liquid storage tank and the pipeline behind the target expansion valve Second, set on-off valve two on the bypass pipe two, wherein the on-off valve two has a throttling function, and the target expansion valve is set on the inlet pipeline of the evaporator.

In the refrigeration system provided by the embodiment of this application, on the basis of the common compressor fluorine pump system, the position of the liquid storage tank in the system is changed, and the liquid storage tank connected in series in the system is changed to be connected in parallel in the refrigeration system. Specifically, a bypass pipe one is added between the liquid storage tank and the liquid pipe (that is, the pipeline connected to the condenser), and a switch valve one is added on the bypass pipe one. In addition, it is necessary to add a second bypass pipe between the liquid storage tank and the pipeline after the target expansion valve, and add a switch valve two to the second bypass pipe. It should be noted that the target expansion valve is placed on the inlet pipeline of the evaporator, and the pipeline behind the target expansion valve is a low-pressure pipeline, and a bypass pipe 2 can be added between the liquid storage tank and the suction pipe of the compressor. Alternatively, a second bypass pipe is added between the liquid storage tank and the inlet pipe of the evaporator behind the target expansion valve. By adding bypass channel 1 and bypass channel 2 in the pipelines connecting the liquid storage tank, condenser, compressor and evaporator, the stable operation of the refrigeration system is ensured, and the adjustment effect of the refrigerant circulation in the refrigeration system is improved. .

It should be noted that FIG. 1 only shows the structure shown in the principle diagram of the refrigeration system provided by the embodiment of the present application, and the structure may have many variations. For example, switch valves are added in front of the compressor, throttling components are connected in parallel with switch valves, and maintenance valves, protection devices, sensors and other devices are added in the pipeline.

In addition, the liquid storage tank provided by this application is connected in parallel in the system, and the pipeline and valve design are used, and the pressure difference between the switch of the valve and the system itself is used to realize the storage, release and retention of the refrigerant from the system to the liquid storage tank, etc. The functional technology is also applicable to heat pump systems with different cooling/heating operating modes.

According to an embodiment of the present application, a method for adjusting the circulating amount of refrigerant is also provided, and the method for adjusting the circulating amount of refrigerant provided by the embodiment of the present application can be applied to the above-mentioned refrigeration system.

Fig. 2 is a flow chart of a method for adjusting a refrigerant circulation amount according to an embodiment of the present application. As shown in Figure 2, the method includes the following steps:

Step S101, when the refrigeration system is running, determine the amount of refrigerant circulation in the refrigeration system.

There are many ways to determine the amount of refrigerant circulation in the refrigeration system. For example, monitor the refrigerant subcooling degree at the condenser outlet; determine the refrigerant circulation amount based on the refrigerant subcooling degree at the condenser outlet. Through the above method, the circulation amount of the refrigerant in the refrigeration system can be obtained accurately and quickly.

In step S102, the operating state of the refrigeration system is determined according to the circulation amount of the refrigerant.

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 too much refrigerant or too little refrigerant. The operating state of the refrigeration system can be determined according to the amount of refrigerant circulation.

Step S103, according to the operating state of the refrigeration system, control the open state of the on-off valve 1 and the on-off valve 2, so as to adjust the circulation amount of the refrigerant in the refrigerating system.

When the refrigeration system is running, according to the operating state of the refrigeration system, and using the pressure difference between the switch valve and the refrigeration system itself, the storage, release and maintenance of the refrigerant from the refrigeration system to the liquid storage tank can be realized, so that it can be convenient Quickly adjust the refrigerant circulation in the refrigeration system.

To sum up, through the above steps S101 to S103, the operating state of the refrigeration system is determined by the amount of refrigerant circulation in the refrigeration system, and then the refrigerant in the refrigeration system is adjusted according to the operating state of the refrigeration system and by controlling the opening and closing of the two on-off valves. The circulation volume is adjusted. Therefore, the stable operation of the refrigeration system can be ensured, thereby improving the effect of adjusting the circulation amount of the refrigerant in the refrigeration system.

Optionally, in the method for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, determining the operating state of the refrigeration system according to the amount of refrigerant circulation includes: if it is judged that the amount of refrigerant circulation is less than the first preset amount of refrigerant circulation, then determining the operating state of the refrigeration system The operating state is the state where the liquid storage tank releases the refrigerant; if it is judged 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, it is determined that the refrigeration system is in the cooling state; if it is judged that the refrigerant circulation If the amount is greater than or equal to the second preset refrigerant circulation amount, it is determined that the operating state of the refrigeration system is the state of recovering refrigerant from the liquid storage tank.

When the refrigeration system is running, the refrigerant circulation volume is detected in real time, and the operating state of the refrigeration system is determined according to the detection and comparison of the refrigerant circulation volume. 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 storage tank to release the refrigerant 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 If the refrigerant circulation amount is preset, the refrigeration system is controlled to enter the refrigeration state; 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 storage tank recovery refrigerant state until the refrigerant amount is appropriate.

Through the above solution, based on the detection and comparison of the refrigerant circulation volume in the refrigeration system, it is possible to accurately and quickly determine which operating state the refrigeration system is in at this time.

Optionally, in the method for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, according to the operating state of the refrigeration system, controlling the open state of the on-off valve 1 and the on-off valve 2, so as to adjust the amount of refrigerant circulation in the refrigeration system includes : If the operating state of the refrigerating system is cooling, the control on-off valve 1 and on-off valve 2 are both in the closed state; Open state; if the operating state of the refrigeration system is the liquid storage tank recovering refrigerant state, the control switch valve 1 is in the open state, and the switch valve 2 is in the closed state.

When the refrigerating system is in the refrigerating state, the compressor or the refrigerant pump operates normally to refrigerate, and the control switch valve 1 and switch valve 2 are both in the closed state. Therefore, the liquid storage tank and the refrigeration cycle pipeline will be isolated at this time, and the liquid storage tank at this time will not have any impact on the refrigeration system, so the common problem of loss of subcooling will not occur in the refrigeration system.

When the refrigeration system is in the state where the liquid storage tank releases the refrigerant, the compressor in the refrigeration system can still operate normally at this time, and the control switch valve 1 is in the closed state and the switch valve 2 is in the open state. At this time, the running compressor will suck out the refrigerant in the liquid storage tank and discharge it into the refrigerant circulation loop of the refrigeration system, so as to achieve the effect of replenishing the refrigerant in the refrigeration cycle.

When the refrigeration system is in the state of recovering refrigerant from the liquid storage tank, the compressor or pump in the refrigeration system is running normally, and the switch valve 2 is controlled to be closed and the switch valve 1 is opened. At this time, the refrigerant in the liquid storage tank is at the saturation pressure corresponding to the ambient temperature, and the condenser outlet is at the saturation pressure corresponding to the condensation temperature. Since the ambient temperature must be lower than the condensation temperature, the pressure in the liquid storage tank will be lower than the condensation at the condenser outlet. Fluid pressure, so the refrigerant in the condenser will flow into the liquid storage tank to achieve the effect of the liquid storage tank recovering the refrigerant.

Through the above scheme, the opening states of the two on-off valves can be controlled respectively according to the operating status of the refrigeration system, and the refrigerant circulation volume in the refrigeration system can be adjusted conveniently and quickly, thereby ensuring the stable operation of the refrigeration system and improving the efficiency of the refrigeration system. Adjust the refrigerant circulation in the refrigeration system.

Optionally, in the method for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, the method further includes: if the operating state of the refrigeration system is a cooling state, detecting the subcooling degree of the refrigerant in front of the target expansion valve, wherein the target expansion valve The valve is set on the inlet pipeline of the evaporator; the operating state of the refrigeration system is determined based on the subcooling degree of the refrigerant.

By detecting the subcooling degree in front of the expansion valve on 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 subcooling degree of the refrigerant in front of the target expansion valve.

Optionally, in the method for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, determining the operating state of the refrigeration system based on the refrigerant subcooling degree includes: judging whether the refrigerant supercooling degree is between the first preset refrigerant subcooling degree and the second preset refrigerant subcooling degree. Within the range of the preset refrigerant subcooling degree, wherein, the second preset refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree; when the refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree and less than the second preset When the subcooling degree of the refrigerant is set, the operating state of the refrigeration system is controlled to remain in the cooling state.

First, set the lower limit of subcooling degree Ta (corresponding to the above-mentioned first preset refrigerant subcooling degree) and the upper limit of subcooling degree Tb (corresponding to the above-mentioned second preset refrigerant subcooling degree), wherein, Tb is greater than Ta, these two Each value can be flexibly set according to the actual situation of the refrigeration system. When the refrigeration system is in the cooling state, the subcooling degree in front of the expansion valve is detected in real time. Detect whether the subcooling degree in front of the expansion valve is between Ta and Tb, if so, continue to maintain the refrigeration state.

In the above solution, after the refrigeration system is in the cooling state, by continuing to monitor whether the refrigerant subcooling degree is within the range of the first preset refrigerant supercooling degree and the second preset refrigerant Continue to keep cool.

Optionally, in the method for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant subcooling degree is less than or equal to the first preset refrigerant subcooling degree, controlling The refrigeration system enters the state of releasing the refrigerant from the liquid storage tank, the control switch valve 1 is in the closed state, and the switch valve 2 is in the open state, and detects whether the refrigerant supercooling degree is greater than the third preset refrigerant supercooling degree, wherein the third preset refrigerant supercooling degree The cooling degree is less than the first preset refrigerant subcooling degree; if the refrigerant subcooling degree is not greater than the third preset refrigerant supercooling degree, then the operating state of the control refrigeration system will continue to be in the state where the liquid storage tank releases the refrigerant; if the refrigerant supercooling degree If it is greater than the third preset refrigerant subcooling degree, the refrigeration system is controlled to enter the refrigeration state.

If the subcooling degree of the refrigerant is not within the range between the first preset refrigerant subcooling degree and the second preset refrigerant subcooling degree, it is judged whether the pre-valve subcooling degree is less than or equal to Ta (corresponding to the above-mentioned first preset refrigerant subcooling degree degree), if it is, it means that the refrigerant in the refrigeration cycle is not enough, and the refrigeration system may be in a situation of insufficient liquid supply, then control the refrigeration system to enter the release state of the liquid storage tank, and replenish the refrigerant in the liquid storage tank in the refrigeration cycle. In this state, it continuously detects and judges whether the subcooling degree before the valve is greater than Ta+1K (corresponding to the third preset refrigerant subcooling degree above). Poor, if the judgment result is yes, it means that the refrigerant is sufficient, and then control the refrigeration system to enter the refrigeration state. If the judgment result is no, it means that the refrigerant is not enough, and the refrigeration system still needs to be kept in the state of releasing the liquid storage tank.

In the above scheme, after the refrigeration system is in the cooling state, the subcooling degree of the refrigerant is continuously monitored, and the operating state of the refrigeration system is adjusted in real time according to the subcooling degree of the refrigerant, thereby ensuring the stable operation of the refrigeration system and improving the efficiency of the refrigeration system. The effect of adjusting the amount of refrigerant circulation.

Optionally, in the method for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant subcooling degree is greater than or equal to the second preset refrigerant subcooling degree, controlling The refrigeration system enters the state of recovering refrigerant from the liquid storage tank, the control switch valve 1 is in the open state, and the switch valve 2 is in the closed state, and detects whether the refrigerant supercooling degree is less than the fourth preset refrigerant supercooling degree, wherein the fourth preset refrigerant supercooling degree The cooling degree is greater than the second preset refrigerant subcooling degree; if the refrigerant subcooling degree is not less than the fourth preset refrigerant supercooling degree, then the operating state of the control refrigeration system will continue to be in the state of liquid storage tank recovering refrigerant; if the refrigerant supercooling degree If it is less than the fourth preset refrigerant subcooling degree, the refrigeration system is controlled to enter the refrigeration state.

Determine whether the subcooling degree before the valve is greater than or equal to Tb (corresponding to the second preset refrigerant subcooling degree above), if yes, 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 recovery state of the liquid storage tank means that the refrigerant in the liquid storage tank is discharged into the liquid storage tank. In this state, continuously detect and judge whether the subcooling degree before the valve is less than Tb-1K (corresponding to the fourth preset refrigerant subcooling degree mentioned above). Poor, if the judgment result is yes, it means that the amount of refrigerant has not exceeded, and then control the refrigeration system to enter the refrigeration state. If the judgment result is no, it means that the amount of refrigerant is still too much, and the refrigeration system still needs to be kept in the recovery state of the liquid storage tank.

The control flow diagram of the refrigeration system in the refrigeration state is shown in Figure 3. The above-mentioned first preset refrigerant subcooling degree is Ta in the figure, the second preset refrigerant supercooling degree is Tb in the figure, the third preset refrigerant subcooling degree is Ta+1K in the figure, and the fourth preset refrigerant subcooling degree is Ta+1K in the figure. Let the subcooling degree of the refrigerant be Tb-1K in the figure.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

The embodiment of the present application also provides a device for adjusting the amount of refrigerant circulation. It should be noted that the device for adjusting the amount of refrigerant circulation in the embodiment of the present application can be used to perform the adjustment for the amount of refrigerant circulation provided in the embodiment of the present application. method. The device for adjusting the circulation amount of refrigerant provided by the embodiments of the present application is introduced below.

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

Specifically, the first determination unit 401 is configured to determine the refrigerant circulation amount in the refrigeration system when the refrigeration system is running;

The second determination unit 402 is configured to determine the operating state of the refrigeration system according to the circulation amount of the refrigerant;

The first control unit 403 is configured to control the opening states of the on-off valve 1 and the on-off valve 2 according to the operating state of the refrigerating system, so as to adjust the circulation amount of the refrigerant in the refrigerating system.

To sum up, the adjusting device of the refrigerant circulation amount provided by the embodiment of the present application uses the first determination unit 401 to determine the refrigerant circulation amount in the refrigeration system when the refrigeration system is running; the second determination unit 402 determines the refrigerant circulation amount of the refrigeration system according to the refrigerant circulation amount. Operating state: the first control unit 403 controls the opening state of switch valve 1 and switch valve 2 according to the operating state of the refrigeration system, so as to adjust the circulation amount of refrigerant in the refrigeration system, which solves the problem of refrigerant in the refrigeration system in the related art. For the problem of poor adjustment effect of the circulation volume, the operating state of the refrigeration system is determined according to the refrigerant circulation volume in the refrigeration system, and the opening or closing of the switching valve 1 and the switching valve 2 is controlled according to the operating state of the refrigeration system. The refrigerant circulation amount in the refrigeration system can be accurately adjusted, thereby ensuring the stable operation of the refrigeration system, and further improving the effect of adjusting the refrigerant circulation amount in the refrigeration system.

Optionally, in the adjusting device for the amount of refrigerant circulation provided in the embodiment of the present application, the second determination unit includes: a first processing module, configured to determine that if the amount of refrigerant circulation is less than the first preset amount of refrigerant circulation, then determine the refrigeration system The operating state is the state of the liquid storage tank releasing the refrigerant; the second processing module is used to determine the operating state of the refrigeration system 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 It is a refrigeration state; the third processing module is used to determine that if the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, then it is determined that the operation state of the refrigeration system is the refrigerant recovery state of the liquid storage tank.

Optionally, in the device for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, the first control unit includes: a first control module, configured to control the on-off valve 1 and the on-off valve 2 if the operating state of the refrigeration system is the cooling state. Both are in the closed state; the second control module is used to control the on-off valve one to be closed and the on-off valve two to be on if the operating state of the refrigeration system is the liquid storage tank releasing refrigerant; the third control module is used to The operating state of the system is the state of the liquid storage tank recovering the refrigerant, the control switch valve 1 is in the open state, and the switch valve 2 is in the closed state.

Optionally, in the device for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, the device further includes: a first detection unit, configured to detect the refrigerant excess in front of the target expansion valve if the operating state of the refrigeration system is the cooling state. The cooling degree, wherein the target expansion valve is arranged on the inlet pipeline of the evaporator; the third determination unit is used to determine the operating state of the refrigeration system based on the subcooling degree of the refrigerant.

Optionally, in the device for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, the third determination unit includes: a first judging module, configured to judge whether the refrigerant subcooling degree is between the first preset refrigerant supercooling degree and Within the range of the second preset refrigerant subcooling degree, wherein, the second preset refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree; the fourth control module is used for when the refrigerant supercooling degree When it is greater than the first preset refrigerant subcooling degree and less than the second preset refrigerant subcooling degree, the operating state of the refrigeration system is controlled to remain in the cooling state.

Optionally, in the device for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, the third determination unit further includes: a fourth processing module, configured to if the degree of subcooling of the refrigerant is less than or equal to the first preset degree of subcooling of the refrigerant , controlling the refrigeration system to enter the state of releasing the refrigerant from the liquid storage tank, controlling the switch valve 1 to be in the closed state, and the switch valve 2 to be in the open state, and detecting whether the degree of supercooling of the refrigerant is greater than the third preset refrigerant supercooling degree, wherein, the third preset refrigerant subcooling degree is less than the first preset refrigerant subcooling degree; the fifth control module is configured to coldness, then control the operation state of the refrigeration system to continue to maintain the state where the liquid storage tank releases the refrigerant; the sixth control module is used to control if the refrigerant subcooling degree is greater than the third preset refrigerant subcooling degree The refrigeration system enters a refrigeration state.

Optionally, in the device for adjusting the amount of refrigerant circulation provided in the embodiment of the present application, the third determination unit further includes: a fifth processing module, configured to if the degree of subcooling of the refrigerant is greater than or equal to the second preset degree of subcooling of the refrigerant , controlling the refrigeration system to enter the state of recovering refrigerant from the liquid storage tank, controlling the switch valve 1 to be in the open state, and the switch valve 2 to be in the closed state, and detecting whether the degree of supercooling of the refrigerant is less than the fourth preset refrigerant supercooling degree, wherein, the fourth preset refrigerant subcooling degree is greater than the second preset refrigerant subcooling degree; the seventh control module is configured to coldness, then control the operating state of the refrigeration system to continue to maintain the refrigerant recovery state of the liquid storage tank; the eighth control module is used to control if the refrigerant supercooling degree is less than the fourth preset refrigerant supercooling degree The refrigeration system enters a refrigeration state.

Optionally, in the adjusting device for the amount of refrigerant circulation provided in the embodiment of the present application, the first determination unit includes: a first monitoring module, configured to monitor the degree of subcooling of the refrigerant at the outlet of the condenser; a second determination module, configured based on The subcooling degree of the refrigerant at the outlet of the condenser determines the amount of refrigerant circulation.

The adjusting device for the amount of refrigerant circulation includes a processor and a memory. The above-mentioned first determination unit 401, second determination unit 402, and first control unit 403 are all stored in the memory as program units, and are executed by the processor and stored in the memory. The above-mentioned program unit realizes the corresponding function.

The processor includes a kernel, and the kernel fetches corresponding program units from the memory. One or more cores can be set, and the effect of adjusting the refrigerant circulation in the refrigeration system can be realized by adjusting the core parameters.

Memory may include non-permanent memory in computer-readable media, in the form of random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM), memory including at least one memory chip.

An embodiment of the present invention provides a storage medium on which a program is stored, and when the program is executed by a processor, the method for adjusting the circulation amount of the refrigerant is realized.

An embodiment of the present invention provides a processor, and the processor is used to run a program, wherein the method for adjusting the amount of refrigerant circulation is executed when the program is running.

An embodiment of the present invention provides a device. The device includes a processor, a memory, and a program stored in the memory and operable on the processor. When the processor executes the program, the following steps are implemented: when the refrigeration system is running, determine the The amount of refrigerant circulation in the refrigeration system; the operating state of the refrigeration system is determined according to the refrigerant circulation amount; according to the operating state of the refrigeration system, the opening state of the switching valve 1 and the switching valve 2 is controlled to Regulate the circulation volume of the refrigerant in the refrigeration system.

When the processor executes the program, the following steps are also implemented: determining the operating state of the refrigeration system according to the refrigerant circulation amount includes: if it is judged that the refrigerant circulation amount is less than the first preset refrigerant circulation amount, then determining the operation state of the refrigeration system The state is the refrigerant release state of the liquid storage tank; if it is judged 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, it is determined that the operation state of the refrigeration system is normal refrigeration State refrigeration state; if it is judged that the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, then it is determined that the operation state of the refrigeration system is the liquid storage tank recovering refrigerant state.

When the processor executes the program, the following steps are also implemented: according to the operating state of the refrigeration system, controlling the opening states of the on-off valve 1 and the on-off valve 2, so as to adjust the amount of refrigerant circulation in the refrigeration system includes: If the operating state of the refrigeration system is the normal cooling state, control the on-off valve one and the on-off valve two to be in the closed state; The on-off valve one is in the closed state, and the on-off valve two is in the open state; if the operation state of the refrigeration system is the state of the liquid storage tank recovering refrigerant, the on-off valve one is controlled to be in the open state, and the on-off valve two is in the closed state. state.

When the processor executes the program, the following steps are also implemented: the method further includes: if the operating state of the refrigeration system is a normal cooling state, detecting the subcooling degree of the refrigerant in front of the target expansion valve, wherein the target expansion valve It is arranged on the inlet pipeline of the evaporator; and the operating state of the refrigeration system is determined based on the subcooling degree of the refrigerant.

When the processor executes the program, the following steps are also implemented: determining the operating state of the refrigeration system based on the refrigerant subcooling degree includes: judging whether the refrigerant supercooling degree is between the first preset refrigerant subcooling degree and the second preset refrigerant subcooling degree Within the range of subcooling degree, wherein, the second preset refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree; when the refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree, And when it is less than the second preset refrigerant subcooling degree, the operating state of the refrigeration system is controlled to remain in the refrigeration state.

When the processor executes the program, the following steps are also implemented: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant subcooling degree is less than or equal to a first preset refrigerant subcooling degree, controlling the cooling The system enters the state of releasing the refrigerant from the liquid storage tank, controls the switch valve 1 to be in the closed state, and the switch valve 2 to be in the open state, and detects whether the refrigerant supercooling degree is greater than the third preset refrigerant supercooling degree, wherein, the 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, then control the operating state of the refrigeration system Continue to maintain the refrigerant release state for the liquid storage tank; if the refrigerant subcooling degree is greater than the third preset refrigerant subcooling degree, control the refrigeration system to enter the cooling state.

When the processor executes the program, the following steps are also implemented: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant subcooling degree is greater than or equal to a second preset refrigerant subcooling degree, controlling the cooling The system enters the state of recovering refrigerant from the liquid storage tank, controls the switch valve 1 to be in the open state, and the switch valve 2 to be in the closed state, and detects whether the refrigerant supercooling degree is less than the fourth preset refrigerant supercooling degree, wherein the 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, then control the operating state of the refrigeration system Continue to maintain the state of recovering refrigerant for the liquid storage tank; if the subcooling degree of the refrigerant is less than the fourth preset refrigerant subcooling degree, control the refrigeration system to enter the cooling state.

When the processor executes the program, the following steps are also implemented: determining the amount of refrigerant circulation in the refrigeration system includes: monitoring the refrigerant subcooling degree at the condenser outlet; determining the refrigerant subcooling degree based on the refrigerant supercooling degree at the condenser outlet circulation volume.

The present application also provides a computer program product, which, when executed on a data processing device, is adapted to execute a program initialized with the following method steps: when the refrigeration system is running, determine the amount of refrigerant circulation in the refrigeration system; Determine the operating state of the refrigeration system according to the refrigerant circulation amount; according to the operating state of the refrigeration system, control the open state of the on-off valve 1 and the on-off valve 2 to circulate the refrigerant in the refrigeration system volume is adjusted.

When executed on the data processing equipment, it is also suitable for executing the initialization program with the following method steps: determining the operating state of the refrigeration system according to the refrigerant circulation amount includes: if it is judged that the refrigerant circulation amount is less than the first preset refrigerant If it is judged 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, then Determining that the operating state of the refrigeration system is a normal cooling state; if it is determined that the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, then determining that the operating state of the refrigeration system is a liquid storage tank recovery refrigerant state .

When executed on a data processing device, it is also suitable for executing a program initialized with the following method steps: according to the operating state of the refrigeration system, controlling the opening states of the on-off valve 1 and the on-off valve 2 to control the Adjusting the amount of refrigerant circulation in the refrigeration system includes: if the operation state of the refrigeration system is a normal refrigeration state, controlling the on-off valve 1 and the on-off valve 2 to be in a closed state; The state is the state of the liquid storage tank releasing the refrigerant, 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 state of the liquid storage tank to recover the refrigerant, control the switch valve one to In the open state, the switch valve two is in the closed state.

When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: the method also includes: if the operating state of the refrigeration system is a normal refrigeration state refrigeration state, detecting the refrigerant in front of the target expansion valve The degree of subcooling, wherein the target expansion valve is arranged on the inlet pipeline of the evaporator; the operating state of the refrigeration system is determined based on the degree of subcooling of the refrigerant.

When executed on a data processing device, it is also suitable for executing a program initialized with the following method steps: determining the operating state of the refrigeration system based on the refrigerant subcooling degree includes: judging whether the refrigerant supercooling degree is in a first preset Set the refrigerant subcooling degree within the range of the second preset refrigerant subcooling degree, wherein the second preset refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree; when the refrigerant supercooling degree is greater than When the first preset refrigerant subcooling degree is less than the second preset refrigerant subcooling degree, the operating state of the refrigeration system is controlled to remain in the cooling state.

When executed on a data processing device, it is also suitable for executing a program initialized with the following method steps: determining the operating state of the refrigeration system based on the refrigerant subcooling degree further includes: if the refrigerant supercooling degree is less than or equal to the first Preset the supercooling degree of the refrigerant, control the refrigeration system to enter the liquid storage tank to release the refrigerant, control the on-off valve one to be in the closed state, and the on-off valve two to be in the open state, and detect whether the refrigerant supercooling degree is greater than the first Three preset refrigerant subcooling degrees, 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 supercooling degree If the refrigerant subcooling degree is greater than the third preset refrigerant subcooling degree, control the refrigeration system to enter the cooling state.

When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: 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 the second Preset the supercooling degree of the refrigerant, control the refrigeration system to enter the state of recovering refrigerant from the liquid storage tank, control the switch valve 1 to be in the open state, and the switch valve 2 to be in the closed state, and detect whether the refrigerant supercooling degree is less than the first Four preset refrigerant subcooling degrees, 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 supercooling degree If the refrigerant subcooling degree is lower than the fourth preset refrigerant subcooling degree, control the refrigeration system to enter the cooling state.

When executed on a data processing device, it is also suitable for executing a program initialized with the following method steps: determining the amount of refrigerant circulation in the refrigeration system includes: monitoring the refrigerant subcooling degree at the outlet of the condenser; The subcooling degree of the refrigerant at the outlet determines the circulation amount of the refrigerant.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. 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, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow diagram procedure or procedures and/or block diagram procedures or blocks.

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

Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and/or nonvolatile memory such as read only memory (ROM) or flash RAM. The memory is an example of a computer readable medium.

Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, 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 technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridge, tape magnetic disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media excludes transitory computer-readable media, such as modulated data signals and carrier waves.

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes Other elements not expressly listed, or elements inherent in the process, method, commodity, or apparatus are also included. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems or computer program products. 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 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, etc.) having computer-usable program code embodied therein.

The above are only examples of the present application, and are not intended to limit the present application. For those skilled in the art, various modifications and changes may occur in this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

A refrigeration system, characterized in that, comprising:

Liquid storage tank, condenser, compressor and evaporator connected in sequence through pipelines;

Wherein, a bypass pipe 1 is set between the pipeline connected to the liquid storage tank and the condenser, and a switch valve 1 is set on the bypass pipe 1; the pipe after the liquid storage tank and the target expansion valve A bypass pipe 2 is set between the pipelines, and a switching valve 2 is set on the bypass pipe 2, wherein the switching valve 2 has the function of throttling, and the target expansion valve is set on the inlet pipeline of the evaporator .
A method for adjusting the amount of refrigerant circulation, characterized in that the method is applied in the refrigeration system according to claim 1, comprising:

When the refrigerating system is running, determine the amount of refrigerant circulation in the refrigerating system;

determining the operating state of the refrigeration system according to the circulation amount of the refrigerant;

According to the operating state of the refrigeration system, the opening states of the on-off valve 1 and the on-off valve 2 are controlled to adjust the circulation amount of refrigerant in the refrigeration system.
The method according to claim 2, wherein determining the operating state of the refrigeration system according to the circulation amount of the refrigerant comprises:

If it is judged that the refrigerant circulation volume is less than the first preset refrigerant circulation volume, then it is determined that the operating state of the refrigeration system is the state where the liquid storage tank releases the refrigerant;

If it is judged 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, then it is determined that the refrigeration system is in a cooling state;

If it is judged that the refrigerant circulation amount is greater than or equal to the second preset refrigerant circulation amount, it is determined that the operating state of the refrigeration system is the state of the liquid storage tank recovering refrigerant.
The method according to claim 2, characterized in that, according to the operating state of the refrigeration system, the opening states of the on-off valve 1 and the on-off valve 2 are controlled, so as to adjust the amount of refrigerant circulation in the refrigeration system. Adjustments include:

If the operating state of the refrigeration system is a refrigeration state, control the switch valve one and the switch valve two to be in a closed state;

If the operating state of the refrigeration system is the state where the liquid storage tank releases the refrigerant, the switch valve 1 is controlled to be in the closed state, and the switch valve 2 is controlled to be in the open state;

If the operating state of the refrigerating system is the liquid storage tank recovering the refrigerant, the on-off valve one is controlled to be in an open state, and the on-off valve two is controlled to be in a closed state.
The method according to claim 4, characterized in that the method further comprises:

If the operating state of the refrigeration system is a cooling state, detecting the subcooling degree of the refrigerant in front of the target expansion valve, wherein the target expansion valve is arranged on the inlet pipeline of the evaporator;

The operating state of the refrigeration system is determined based on the degree of subcooling of the refrigerant.
The method according to claim 5, wherein determining the operating state of the refrigeration system based on the degree of subcooling of the refrigerant comprises:

judging whether the refrigerant subcooling degree is within the range of a first preset refrigerant subcooling degree and a second preset refrigerant subcooling degree, wherein the second preset refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree supercooling;

When the refrigerant subcooling degree is greater than the first preset refrigerant subcooling degree and smaller than the second preset refrigerant subcooling degree, the operating state of the refrigeration system is controlled to remain in a cooling state.
The method according to claim 6, wherein determining the operating state of the refrigeration system based on the degree of subcooling of the refrigerant further comprises:

If the subcooling degree of the refrigerant is less than or equal to the first preset refrigerant subcooling degree, control the refrigeration system to enter the state of releasing the refrigerant from the liquid storage tank, control the switch valve 1 to be in the closed state, and the switch valve 2 to be in the open state, And detecting whether the degree of subcooling of the refrigerant is greater than a third preset degree of subcooling of the refrigerant, wherein the third degree of subcooling of the preset refrigerant is smaller than the first preset degree of subcooling of the refrigerant;

If the degree of subcooling of the refrigerant is not greater than the third preset degree of subcooling of the refrigerant, the operation state of the refrigeration system is controlled to continue to be the state where the liquid storage tank releases the refrigerant;

If the subcooling degree of the refrigerant is greater than the third preset subcooling degree of the refrigerant, the refrigeration system is controlled to enter a cooling state.
The method according to claim 6 or 7, wherein determining the operating state of the refrigeration system based on the degree of subcooling of the refrigerant further comprises:

If the subcooling degree of the refrigerant is greater than or equal to the second preset refrigerant subcooling degree, control the refrigeration system to enter the state of recovering refrigerant from the liquid storage tank, control the switch valve 1 to be in the open state, and the switch valve 2 to be in the 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 degree of subcooling of the refrigerant is not less than the fourth preset degree of subcooling of the refrigerant, the operation state of the refrigeration system is controlled to continue to be in the state of recovering refrigerant from the liquid storage tank;

If the subcooling degree of the refrigerant is less than the fourth preset subcooling degree of the refrigerant, the refrigeration system is controlled to enter a cooling state.
The method according to claim 2, wherein determining the amount of refrigerant circulation in the refrigeration system comprises:

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

The refrigerant circulation amount is determined based on the degree of subcooling of the refrigerant at the outlet of the condenser.
A device for adjusting refrigerant circulation, characterized in that said device is applied in the refrigeration system according to claim 1, comprising:

a first determination unit, configured to determine the amount of refrigerant circulation in the refrigeration system when the refrigeration system is running;

a second determination unit, configured to determine the operating state of the refrigeration system according to the refrigerant circulation amount;

The first control unit is configured to control the opening states of the on-off valve 1 and the on-off valve 2 according to the operating state of the refrigerating system, so as to adjust the circulation amount of refrigerant in the refrigerating system.
A processor, characterized in that the processor is used to run a program, wherein the method for adjusting the circulation amount of refrigerant according to any one of claims 2 to 9 is executed when the program is running.
A storage medium, characterized in that the storage medium includes a stored program, wherein the program executes the method for adjusting the circulation amount of refrigerant according to any one of claims 2-9.