Regulation and control method and regulation and control device of air conditioning system and air conditioning system

Abstract

The invention relates to a regulation and control method and device of an air conditioning system and the air conditioning system.The air conditioning system comprises a plurality of energy accumulators connected in parallel, and the regulation and control method comprises the following steps that when the air conditioning system is in a cold accumulation mode, any energy accumulator in the energy accumulators serves as a target energy accumulator, and the target energy accumulator is connected with the target energy accumulator; whether the phase change material in the target energy accumulator is solidified or not is judged, an unsolidified state and a solidified state are distinguished, and the refrigerant circulation amount of the target energy accumulator is regulated and controlled; or when the air conditioning system is in the cold release mode, any one of the multiple energy accumulators serves as a target energy accumulator, whether the solidified phase change material in the target energy accumulator is completely liquefied or not is judged, the state is distinguished from the incomplete liquefaction state and the complete liquefaction state, and the refrigerant circulation amount of the target energy accumulator is regulated and controlled. The embodiment of the invention is used for relieving the problem that the refrigerant circulation amount of each energy accumulator of the air conditioning system is unbalanced.

Description

Technical Field

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

[0002] When an air-conditioning system has multiple accumulators and the accumulators work simultaneously, the following problems will occur: when the installation positions of the accumulators have a large height difference, for the low-position accumulator, due to the large liquid pipe drop, the refrigerant pressure is different from that of the high-level accumulator; when the connection pipes have different lengths, for the accumulator with a longer connection pipe, the refrigerant flow resistance is large, and the refrigerant circulation volume will be less than that of the accumulator with a shorter connection pipe, and liquid accumulation is also likely to occur. The above problems and other reasons will all lead to uneven refrigerant circulation volumes of the accumulators in the air-conditioning system. Summary of the Invention

[0003] Some embodiments of the present disclosure provide a control method, a control device, and an air-conditioning system for an air-conditioning system, which are used to alleviate the uneven refrigerant circulation volumes of the accumulators in the air-conditioning system.

[0004] In one aspect of the present disclosure, there is provided a control method for an air-conditioning system, where the air-conditioning system includes a plurality of accumulators connected in parallel, and the control method includes the following steps:

[0005] In the cold storage mode of the air-conditioning system, any one of the plurality of accumulators is used as a target accumulator, it is determined whether the phase change material in the target accumulator is solidified, and the refrigerant circulation volume of the target accumulator is regulated by distinguishing between the uncured state and the cured state; or

[0006] In the cold release mode of the air-conditioning system, any one of the plurality of accumulators is used as a target accumulator, it is determined whether the solidified phase change material in the target accumulator is completely liquefied, and the refrigerant circulation volume of the target accumulator is regulated by distinguishing between the incompletely liquefied state and the completely liquefied state.

[0007] In some embodiments, when regulating the refrigerant circulation volume of the target accumulator in the uncured state, it includes: regulating the refrigerant circulation volume of the target accumulator according to the relationship between the heat exchange rate of the target accumulator and the average heat exchange rate of all accumulators.

[0008] In some embodiments, regulating the refrigerant circulation volume of the target accumulator according to the relationship between the heat exchange rate of the target accumulator and the average heat exchange rate of all accumulators includes:

[0009] If the heat exchange rate of the target accumulator is less than the average heat exchange rate of all accumulators, then adjust to increase the refrigerant circulation volume of the target cold storage device;

[0010] If the heat exchange rate of the target energy accumulator is greater than the average heat exchange rate of all energy accumulators, then adjust and reduce the refrigerant circulation amount of the target cold storage device.

[0011] In some embodiments, the relationship between the heat exchange rate of the target energy accumulator and the average heat exchange rate of all energy accumulators is obtained by the following method:

[0012] Compare the temperature of the phase change material in the target energy accumulator with the average value of the temperatures of the phase change materials in all energy accumulators.

[0013] In some embodiments, comparing the temperature of the phase change material in the target energy accumulator with the average value of the temperatures of the phase change materials in all energy accumulators includes:

[0014] If the temperature of the phase change material in the target energy accumulator is greater than the sum of the average value of the temperatures of the phase change materials in all energy accumulators and the temperature change value, then it is determined that the heat exchange rate of the target energy accumulator is less than the average heat exchange rate of all energy accumulators; or

[0015] If the temperature of the phase change material in the target energy accumulator is less than the difference between the average value of the temperatures of the phase change materials in all energy accumulators and the temperature change value, then it is determined that the heat exchange rate of the target energy accumulator is greater than the average heat exchange rate of all energy accumulators;

[0016] Wherein, the temperature change value is a set value.

[0017] In some embodiments, according to the relationship between the heat exchange rate of the target energy accumulator and the average heat exchange rate of all energy accumulators, to regulate the refrigerant circulation amount of the target energy accumulator, includes:

[0018] If the heat exchange rate of the target energy accumulator is equal to the average heat exchange rate of all energy accumulators, then further regulate the refrigerant circulation amount of the target energy accumulator according to the relationship between the outlet pipe temperature of the target energy accumulator and the outlet pipe temperatures of all energy accumulators;

[0019] Wherein, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the energy accumulator through the first port of the energy accumulator, and then flows from the second port of the energy accumulator to the outdoor unit gas pipe, and the pipeline connected to the second port of the energy accumulator is the outlet pipe of the energy accumulator.

[0020] In some embodiments, to regulate the refrigerant circulation amount of the target energy accumulator according to the relationship between the outlet pipe temperature of the target energy accumulator and the outlet pipe temperatures of all energy accumulators, includes:

[0021] If the outlet pipe temperature of the target energy accumulator is greater than the sum of the average value of the outlet pipe temperatures of all energy accumulators and the temperature change value, then the refrigerant distribution amount of the target energy accumulator is less than the average refrigerant distribution amount of all energy accumulators, and adjust to increase the refrigerant distribution amount of the target energy accumulator; or

[0022] If the outlet pipe temperature of the target accumulator is less than the difference between the average of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant distribution amount of the target accumulator is more than the average refrigerant distribution amount of all accumulators, and the refrigerant distribution amount of the target accumulator is adjusted to decrease;

[0023] Among them, the temperature change value is a set value.

[0024] In some embodiments, in the cold storage mode, the refrigerant transported by the external unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows out of the accumulator from the second port to the external unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the external unit liquid pipe;

[0025] The implementation methods for adjusting and increasing the refrigerant circulation amount of the target cold storage device include:

[0026] When the opening degree of the cold storage regulating valve of the target cold storage device has not reached the maximum opening degree, by reducing the target superheat degree of the target accumulator to increase the opening degree of the cold storage regulating valve of the target cold storage device; or

[0027] When the opening degree of the cold storage regulating valve of the target cold storage device has reached the maximum opening degree, then by increasing the target superheat degree of the other accumulators except the target accumulator to reduce the opening degree of the cold storage regulating valves of the other accumulators.

[0028] In some embodiments, in the cold storage mode, the refrigerant transported by the external unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows out of the accumulator from the second port to the external unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the external unit liquid pipe;

[0029] The implementation methods for adjusting and reducing the refrigerant circulation amount of the target cold storage device include:

[0030] By increasing the target superheat degree of the target accumulator to reduce the opening degree of the cold storage regulating valve of the target accumulator.

[0031] In some embodiments, in the solidification state, the regulation of the refrigerant circulation amount of the target accumulator includes: according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, to regulate the refrigerant circulation amount of the target accumulator.

[0032] In some embodiments, according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, to regulate the refrigerant circulation amount of the target accumulator, including:

[0033] If the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, then adjust and reduce the refrigerant circulation amount of the target cold storage device;

[0034] If the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators, adjust and increase the refrigerant circulation volume of the target accumulator.

[0035] In some embodiments, the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators is obtained by the following method:

[0036] Compare the inlet pipe temperature in the target accumulator with the average value of the inlet pipe temperatures in all accumulators;

[0037] Wherein, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows from the second port of the accumulator to the outdoor unit gas pipe. The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator.

[0038] In some embodiments, comparing the inlet pipe temperature in the target accumulator with the average value of the inlet pipe temperatures in all accumulators includes:

[0039] If the inlet pipe temperature in the target accumulator is greater than the sum of the average value of the inlet pipe temperatures in all accumulators and the temperature change value, it is determined that the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators; or

[0040] If the inlet pipe temperature in the target accumulator is less than the difference between the average value of the inlet pipe temperatures in all accumulators and the temperature change value, it is determined that the refrigerant pressure loss of the target accumulator is more than the average refrigerant pressure loss of all accumulators;

[0041] Wherein, the temperature change value is a set value.

[0042] In some embodiments, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows from the second port of the accumulator to the outdoor unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the outdoor unit liquid pipe;

[0043] The implementation method of adjusting and increasing the refrigerant circulation volume of the target accumulator includes:

[0044] By reducing the target superheat degree of the target accumulator to increase the opening degree of the cold storage regulating valve of the target accumulator.

[0045] In some embodiments, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows from the second port of the accumulator to the outdoor unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the outdoor unit liquid pipe:

[0046] The implementation method of adjusting and reducing the refrigerant circulation volume of the target accumulator includes:

[0047] When the opening degree of the cold storage regulating valve of the target cold storage device has not reached the minimum opening degree, increase the target superheat degree of the target energy storage device to reduce the opening degree of the cold storage regulating valve of the target cold storage device; or

[0048] When the opening degree of the cold storage regulating valve of the target cold storage device has reached the minimum opening degree, reduce the target superheat degree of the energy storage devices other than the target energy storage device to increase the opening degree of the cold storage regulating valves of the other energy storage devices.

[0049] In some embodiments, when in an incompletely liquefied state, the refrigerant circulation amount of the target energy storage device is regulated, including: regulating the refrigerant circulation amount of the target energy storage device according to the relationship between the refrigerant pressure loss of the target energy storage device and the average refrigerant pressure loss of all energy storage devices.

[0050] In some embodiments, regulating the refrigerant circulation amount of the target energy storage device according to the relationship between the refrigerant pressure loss of the target energy storage device and the average refrigerant pressure loss of all energy storage devices includes:

[0051] If the refrigerant pressure loss of the target energy storage device is less than the average refrigerant pressure loss of all energy storage devices, then regulate to reduce the refrigerant circulation amount of the target cold storage device;

[0052] If the refrigerant pressure loss of the target energy storage device is greater than the refrigerant pressure loss of all energy storage devices, then regulate to increase the refrigerant circulation amount of the target cold storage device.

[0053] In some embodiments, the relationship between the refrigerant pressure loss of the target energy storage device and the average refrigerant pressure loss of all energy storage devices is obtained by the following method:

[0054] Compare the outlet pipe temperature in the target energy storage device with the average value of the outlet pipe temperatures in all energy storage devices;

[0055] Wherein, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the energy storage device through the second port of the energy storage device, and then flows from the first port of the energy storage device to the indoor unit liquid pipe. Among them, the pipeline connected to the second port of the energy storage device is the outlet pipe of the energy storage device.

[0056] In some embodiments, comparing the outlet pipe temperature in the target energy storage device with the average value of the outlet pipe temperatures in all energy storage devices includes:

[0057] If the outlet pipe temperature in the target energy storage device is greater than the sum of the average value of the outlet pipe temperatures in all energy storage devices and the temperature change value, then the refrigerant pressure loss of the target energy storage device is less than the refrigerant pressure loss of all energy storage devices; or

[0058] If the outlet pipe temperature in the target accumulator is less than the difference between the average of the outlet pipe temperatures in all accumulators and the temperature change value, the refrigerant pressure loss in the target accumulator is greater than the refrigerant pressure loss in all accumulators;

[0059] Wherein, the temperature change value is a set value.

[0060] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe;

[0061] The implementation methods for adjusting and increasing the refrigerant circulation volume of the target cold accumulator include:

[0062] When the opening degree of the cold release regulating valve of the target cold accumulator has not reached the maximum opening degree, adjust and increase the opening degree of the cold release regulating valve of the target cold accumulator; or

[0063] When the opening degree of the cold release regulating valve of the target cold accumulator has reached the maximum opening degree, then adjust and decrease the opening degree of the cold release regulating valves of the other accumulators except the target accumulator.

[0064] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe;

[0065] The implementation methods for adjusting and decreasing the refrigerant circulation volume of the target cold accumulator include:

[0066] Decrease the opening degree of the cold release regulating valve of the target accumulator.

[0067] In some embodiments, in the fully liquefied state, the regulation of the refrigerant circulation volume of the target accumulator includes: regulating the refrigerant circulation volume of the target accumulator according to the relationship between the cold quantity release of the target accumulator and the average cold quantity release of all accumulators.

[0068] In some embodiments, regulating the refrigerant circulation volume of the target accumulator according to the relationship between the cold quantity release of the target accumulator and the average cold quantity release of all accumulators includes:

[0069] If the cold quantity release of the target accumulator is greater than the average cold quantity release of all accumulators, then adjust and decrease the refrigerant circulation volume of the target cold accumulator;

[0070] If the cold quantity release of the target accumulator is less than the average cold quantity release of all accumulators, then adjust and increase the refrigerant circulation volume of the target cold accumulator.

[0071] In some embodiments, the relationship between the cooling capacity release of the target accumulator and the average cooling capacity release of all accumulators is obtained by the following method:

[0072] Compare the temperature of the phase change material in the target accumulator with the average temperature of the phase change materials in all accumulators.

[0073] In some embodiments, comparing the temperature of the phase change material in the target accumulator with the average temperature of the phase change materials in all accumulators includes:

[0074] If the temperature of the phase change material in the target accumulator is greater than the sum of the average temperature of the phase change materials in all accumulators and the temperature change value, it is determined that the cooling capacity release of the target accumulator is greater than the average cooling capacity release of all accumulators; or

[0075] If the temperature of the phase change material in the target accumulator is less than the difference between the average temperature of the phase change materials in all accumulators and the temperature change value, the cooling capacity release of the target accumulator is less than the average cooling capacity release of all accumulators;

[0076] wherein the temperature change value is a set value.

[0077] In some embodiments, according to the relationship between the cooling capacity release of the target accumulator and the average cooling capacity release of all accumulators, the refrigerant circulation amount of the target accumulator is regulated, including:

[0078] If the cooling capacity release of the target accumulator is equal to the average cooling capacity release of all accumulators, further regulate the refrigerant circulation amount of the target accumulator according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators.

[0079] In some embodiments, according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, the refrigerant circulation amount of the target accumulator is regulated, including:

[0080] If the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, adjust and reduce the refrigerant circulation amount of the target cooler;

[0081] If the refrigerant pressure loss of the target accumulator is more than the average refrigerant pressure loss of all accumulators, adjust and increase the refrigerant circulation amount of the target cooler.

[0082] In some embodiments, the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators is obtained by the following method:

[0083] Compare the outlet pipe temperature of the target accumulator with the average of the outlet pipe temperatures of all accumulators;

[0084] Among them, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. Among them, the pipe connected to the second port of the accumulator is the outlet pipe of the accumulator.

[0085] In some embodiments, comparing the outlet pipe temperature of the target accumulator with the average value of the outlet pipe temperatures of all accumulators includes:

[0086] If the outlet pipe temperature of the target accumulator is greater than the sum of the average value of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators; or

[0087] If the outlet pipe temperature of the target accumulator is less than the difference between the average value of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant pressure loss of the target accumulator is more than the average refrigerant pressure loss of all accumulators;

[0088] Among them, the temperature change value is a set value.

[0089] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipe connecting the accumulator and the indoor unit liquid pipe;

[0090] The implementation methods for adjusting and increasing the refrigerant circulation volume of the target cold storage device include:

[0091] If the opening degree of the cold release regulating valve of the target cold storage device has not reached the maximum opening degree, then adjust and increase the opening degree of the cold release regulating valve of the target cold storage device; or

[0092] If the opening degree of the cold release regulating valve of the target cold storage device has reached the maximum opening degree, then adjust and decrease the opening degree of the cold release regulating valves of the other accumulators except the target accumulator.

[0093] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipe connecting the accumulator and the indoor unit liquid pipe:

[0094] The implementation methods for adjusting and decreasing the refrigerant circulation volume of the target cold storage device include:

[0095] Adjust and decrease the opening degree of the cold release regulating valve of the target accumulator.

[0096] In some embodiments, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the energy accumulator through the first port of the energy accumulator, and then flows from the second port of the energy accumulator to the outdoor unit gas pipe. The pipe connected to the first port of the energy accumulator is the inlet pipe of the energy accumulator, and the pipe connected to the second port of the energy accumulator is the outlet pipe of the energy accumulator. According to at least one of the following three comparison results, the refrigerant circulation volume of the target energy accumulator is regulated:

[0097] Comparison of the temperature of the phase change material in the target energy accumulator with the average value of the temperatures of the phase change materials in all energy accumulators;

[0098] Comparison of the outlet pipe temperature of the target energy accumulator with the average value of the outlet pipe temperatures in all energy accumulators; and

[0099] Comparison of the inlet pipe temperature of the target energy accumulator with the average value of the inlet pipe temperatures in all energy accumulators.

[0100] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the energy accumulator through the second port of the energy accumulator, and then flows from the first port of the energy accumulator to the indoor unit liquid pipe. Among them, the pipe connected to the second port of the energy accumulator is the outlet pipe of the energy accumulator. According to at least one of the following two comparison results, the refrigerant circulation volume of the target energy accumulator is regulated:

[0101] Comparison of the temperature of the phase change material in the target energy accumulator with the average value of the temperatures of the phase change materials in all energy accumulators; and

[0102] Comparison of the outlet pipe temperature of the target energy accumulator with the average value of the outlet pipe temperatures in all energy accumulators.

[0103] In some embodiments, each energy accumulator among multiple energy accumulators is used as the target energy accumulator to monitor the refrigerant circulation volume once. If the refrigerant circulation volumes of all energy accumulators meet the requirements, then after an interval of the first preset time, each energy accumulator among the multiple energy accumulators is used as the target energy accumulator to monitor the refrigerant circulation volume once again. If the refrigerant circulation volume of any one of the multiple energy accumulators does not meet the requirements, then the refrigerant circulation volume of this energy accumulator is regulated. After the regulation is completed and the second preset time is reached, each energy accumulator among the multiple energy accumulators is used as the target energy accumulator to monitor the refrigerant circulation volume once again; wherein, the second preset time is greater than the first preset time.

[0104] In one aspect of the present disclosure, a regulation device for an air conditioning system is provided, including,

[0105] One or more modules that execute the above-mentioned regulation method of the air conditioning system.

[0106] In one aspect of the present disclosure, there is provided a control device for an air conditioning system, including: a memory; and a processor coupled to the memory, the processor being configured to execute the above-described control method for the air conditioning system based on instructions stored in the memory.

[0107] In one aspect of the present disclosure, there is provided a computer-readable storage medium having computer instructions stored thereon, and when the computer instructions are executed by a processor, the above-described control method for the air conditioning system is implemented.

[0108] In one aspect of the present disclosure, there is provided a computer program product including computer instructions, and when the computer instructions are executed by a processor, the above-described control method for the air conditioning system is implemented.

[0109] In one aspect of the present disclosure, there is provided an air conditioning system including the above-described control device for the air conditioning system, or the above-described computer-readable storage medium, or the above-described computer program product.

[0110] Based on the above technical solutions, the present disclosure has at least the following beneficial effects:

[0111] In some embodiments, the control method is divided into the control of the cold storage mode and the control of the cold release mode, and the air conditioning system is further divided into the control of the uncured state and the cured state in the cold storage mode, and the air conditioning system is further divided into the control of the incompletely liquefied state and the completely liquefied state in the cold release mode. Therefore, it is possible to specifically determine whether the refrigerant is evenly distributed, and perform control in the case of uneven distribution, so as to promote the improvement of the balanced distribution performance of the refrigerant in the cold storage mode and the cold release mode of the air conditioning system with multiple accumulators, enable each accumulator to have a good heat exchange effect, achieve better cold storage energy efficiency and cold release energy efficiency, and reduce the probability of liquid accumulation, thereby improving the system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0112] The drawings described herein are used to provide a further understanding of the present disclosure, and constitute a part of the present disclosure. The illustrative embodiments and descriptions thereof of the present disclosure are used to explain the present disclosure, and do not constitute an improper limitation to the present disclosure. In the drawings:

[0113] Figure 1 is a schematic diagram of an air conditioning system provided according to some embodiments of the present disclosure;

[0114] Figure 2 is a schematic diagram of an accumulator provided according to some embodiments of the present disclosure;

[0115] Figure 3 is a schematic diagram of the accumulator in the cold storage mode provided according to some embodiments of the present disclosure;

[0116] Figure 4Schematic diagram of an accumulator in the cold release mode provided according to some embodiments of the present disclosure;

[0117] Figure 5 Schematic diagram of the regulation process of an air conditioning system in the non - frozen state during the cold storage mode provided according to some embodiments of the present disclosure;

[0118] Figure 6 Schematic diagram of the regulation process of an air conditioning system in the frozen state during the cold storage mode provided according to some embodiments of the present disclosure;

[0119] Figure 7 Schematic diagram of the regulation process of an air conditioning system in the non - ice - melting state during the cold release mode provided according to some embodiments of the present disclosure;

[0120] Figure 8 Schematic diagram of the regulation process of an air conditioning system in the ice - melting state during the cold release mode provided according to some embodiments of the present disclosure.

[0121] The descriptions of the reference numerals in the drawings are as follows:

[0122] 1 - Outdoor unit; 2 - Energy storage device; 3 - Indoor unit; 4 - Outdoor unit liquid pipe; 5 - Outdoor unit gas pipe; 6 - Indoor unit liquid pipe; 7 - Indoor unit gas pipe; 10 - First pipeline; 20 - Second pipeline; 30 - Third pipeline; 40 - Fourth pipeline; 50 - Fifth pipeline; 60 - Sixth pipeline; 101 - Accumulator; 102 - Cold storage expansion valve; 103 - Cold release solenoid valve; 104 - Cold storage solenoid valve; 105 - Outlet pipe temperature sensing element; 106 - Liquid side main pipe solenoid valve; 107 - Cold release expansion valve; 108 - Inlet pipe temperature sensing element; 109 - Internal temperature sensing element.

[0123] It should be understood that the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. In addition, the same or similar reference numerals represent the same or similar components. Detailed implementation manners

[0124] Now, various exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps, the compositions of the materials, the numerical expressions and values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0125] As used in this disclosure, the terms "first", "second" and similar terms do not denote any order, quantity or importance, but are only used to distinguish different parts. Terms such as "comprising" or "including" mean that the elements before the term cover the elements listed after the term, and do not exclude the possibility of also covering other elements. Terms such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0126] In this disclosure, when it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When it is described that a specific device is connected to other devices, the specific device may be directly connected to the other devices without an intermediate device, or may not be directly connected to the other devices but have an intermediate device.

[0127] All terms used in this disclosure (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those in a general dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0128] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the specification.

[0129] Reference Figure 1 , the air conditioning system includes an outdoor unit 1, a plurality of energy storage devices 2, an indoor unit 3, an outdoor unit liquid pipe 4, an outdoor unit gas pipe 5, an indoor unit liquid pipe 6 and an indoor unit gas pipe 7.

[0130] The outdoor unit 1 is connected in parallel with a plurality of energy storage devices 2 through the outdoor unit liquid pipe 4, and the outdoor unit 1 is also connected in parallel with a plurality of energy storage devices 2 through the outdoor unit gas pipe 5 (only three energy storage devices 2 are shown in the figure as an example). The indoor unit 3 is connected in parallel with a plurality of energy storage devices 2 through the indoor unit liquid pipe 6, and the indoor unit 3 is also connected in parallel with a plurality of energy storage devices 2 through the indoor unit gas pipe 7.

[0131] Reference Figure 2, the energy storage device 2 includes an accumulator 101. The outdoor unit liquid pipe 4 is connected in parallel to the first pipeline 10 and the second pipeline 20. The first pipeline 10 is also connected in parallel to the third pipeline 30 and the fourth pipeline 40. The third pipeline 30 is connected to the first port of the accumulator 101. The fourth pipeline 40 is connected to the indoor unit liquid pipe 6. The second pipeline 20 is connected to the indoor unit liquid pipe 6. The outdoor unit gas pipe 5 is connected to the indoor unit gas pipe 7. The second port of the accumulator 101 is connected to the indoor unit gas pipe 7 through a fifth pipeline 50. The fifth pipeline 50 and the first pipeline 10 are connected through a sixth pipeline 60. A cold storage expansion valve 102 is provided on the first pipeline 10, a liquid side main pipe solenoid valve 106 is provided on the second pipeline 20, a cold release expansion valve 107 is provided on the fourth pipeline 40, a cold storage solenoid valve 104 is provided on the fifth pipeline 50, and a cold release solenoid valve 103 is provided on the sixth pipeline 60. The cold storage solenoid valve 104 is farther from the second port of the accumulator 101 relative to the connection point of the sixth pipeline 60 and the fifth pipeline 50.

[0132] An inlet pipe temperature sensing element 108 is arranged on the pipe wall of the third pipeline 30 connected to the first port of the accumulator 101. An outlet pipe temperature sensing element 105 is arranged on the pipe wall of the fifth pipeline 50 connected to the second port of the accumulator 101. Water or other phase change materials are loaded inside the accumulator 101 for cold storage and cold release (the following description is based on water as the cold storage material). An internal temperature sensing element 109 is buried in the water. Definition: The pipeline connected to the first port of the accumulator 101 is the inlet pipe of the accumulator, and the pipeline connected to the second port of the accumulator 101 is the outlet pipe of the accumulator.

[0133] Reference Figure 3 , in the cold storage mode, the refrigerant transported from the outdoor unit 1 flows along the outdoor unit liquid pipe 4, enters the first pipeline 10, passes through the cold storage expansion valve 102 on the first pipeline 10, enters the third pipeline 30, passes through the third pipeline 30 and enters the accumulator 101, exchanges heat with the water in the accumulator 101, stores the cold in the accumulator 101, and then the refrigerant flows from the accumulator 101 to the fifth pipeline 50, passes through the cold storage solenoid valve 104 on the fifth pipeline 50, and returns to the outdoor unit 1 along the outdoor unit gas pipe 5.

[0134] Reference Figure 4 , in the cold release mode, the refrigerant transported from the outdoor unit 1 flows along the outdoor unit liquid pipe 4 into the first pipeline 10, then enters the sixth pipeline 60, passes through the cold release solenoid valve 103 on the sixth pipeline 60 and enters the fifth pipeline 50, then enters the accumulator 101, exchanges heat with the water in the accumulator 101, absorbs the cold stored in the accumulator 101, and then the refrigerant enters the third pipeline 30 from the accumulator 101, then flows to the fourth pipeline 40, passes through the cold release expansion valve 107 on the fourth pipeline 40, enters the indoor unit liquid pipe 6, and enters the indoor unit 3 for refrigeration along the indoor unit liquid pipe 6. The refrigerant that has completed refrigeration enters the outdoor unit gas pipe 5 along the indoor unit gas pipe 7 and returns to the outdoor unit 1.

[0135] Since there is a problem of uneven refrigerant distribution among accumulators in the cold storage mode and the cold release mode of the air conditioning system, based on this, the embodiments of the present disclosure provide a control method for an air conditioning system to adjust the refrigerant balance among accumulators.

[0136] In some embodiments, the air conditioning system includes a plurality of accumulators connected in parallel.

[0137] In the cold storage mode, the refrigerant delivered by the outdoor unit liquid pipe 4 is sent to the accumulator 2 through the first port of the accumulator 2, and then flows from the second port of the accumulator 2 to the outdoor unit gas pipe 7. A cold storage regulating valve is provided on the pipeline connecting the accumulator 2 and the outdoor unit liquid pipe 6. Definition: The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator, and the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator.

[0138] The cold storage regulating valve can be a throttling element or an expansion valve. For example: The cold storage regulating valve is Figure 3 the cold storage expansion valve 102 in

[0139] In the cold release mode, the refrigerant delivered by the outdoor unit liquid pipe 4 enters the accumulator 2 through the second port of the accumulator 2, and then flows from the first port of the accumulator 2 to the indoor unit liquid pipe 6. A cold release regulating valve is provided on the pipeline connecting the accumulator 2 and the indoor unit liquid pipe 6. Definition: The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator, and the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator.

[0140] The cold release regulating valve can be a throttling element or an expansion valve. For example: The cold release regulating valve is Figure 4 the cold release expansion valve 107 in

[0141] In some embodiments, the control method of the air conditioning system includes the following steps:

[0142] In the cold storage mode of the air conditioning system, any one of the plurality of accumulators is used as the target accumulator, and it is judged whether the phase change material in the target accumulator is solidified, and the refrigerant circulation amount of the target accumulator is regulated by distinguishing between the non-solidified state and the solidified state.

[0143] In some embodiments, the control method of the air conditioning system includes the following steps:

[0144] In the cold release mode of the air conditioning system, any one of the plurality of accumulators is used as the target accumulator, and it is judged whether the solidified phase change material in the target accumulator is completely liquefied, and the refrigerant circulation amount of the target accumulator is regulated by distinguishing between the non-completely liquefied state and the completely liquefied state.

[0145] In the embodiments of the present disclosure, the phase change material provided in the accumulator serves as the energy storage material of the accumulator. The phase change material may include inorganic phase change materials such as water or hydrates, or may also include organic phase change materials such as ethylene glycol and glycerol.

[0146] Since the phase change material can have various types, for the sake of simplicity in description, water is used as the phase change material in the accumulator in the embodiments of the present disclosure for illustration. When the phase change material is water, the solidification of the phase change material corresponds to the freezing of water, and the liquefaction of the phase change material corresponds to the melting of ice into water.

[0147] In the cold storage mode of the air-conditioning system, since the refrigerant state of the inlet and outlet pipes of the accumulator varies greatly before and after the water in the accumulator freezes. Among them, when the water has not frozen, the refrigerant exchanges heat with the water, and the heat exchange effect is good. Therefore, the outlet pipe of the accumulator has superheat, and it is possible to judge whether the refrigerant in each accumulator is balanced based on the inlet pipe temperature and outlet pipe temperature of the refrigerant in each accumulator. At the same time, the change in water temperature can also be used as an indicator. However, once the water starts to freeze, the heat exchange between the refrigerant and the ice is poor, and the temperature difference between the refrigerant in the inlet and outlet pipes of the accumulator is small. Therefore, the outlet pipe of the accumulator refrigerant does not have superheat, and at the same time, the water temperature is always at 0°C and cannot be used as a judgment indicator. Therefore, it is necessary to distinguish and judge according to whether the water starts to freeze and propose respective measures to adjust the refrigerant balance.

[0148] Similarly, in the cold release mode of the air-conditioning system, different judgment methods and regulation measures are also adopted before and after the ice completely melts.

[0149] Based on this, the regulation method provided in this application is divided into the regulation of the cold storage mode and the regulation of the cold release mode. Moreover, in the cold storage mode of the air-conditioning system, it is further divided into the regulation of the uncured state and the cured state. In the cold release mode of the air-conditioning system, it is further divided into the regulation of the incompletely liquefied state and the completely liquefied state. Therefore, it is possible to specifically judge whether the refrigerant is evenly distributed, and perform regulation in the case of uneven distribution, so as to promote the air-conditioning system with multiple accumulators to improve the even distribution performance of the refrigerant in the cold storage mode and the cold release mode, enable each accumulator to have a good heat exchange effect, achieve better cold storage energy efficiency and cold release energy efficiency, and reduce the occurrence probability of liquid accumulation, thereby improving the system reliability.

[0150] In some embodiments, in the uncured state, to judge whether the refrigerant distribution of each accumulator in the air-conditioning system is balanced, it can be determined by judging whether the heat exchange rate of the target accumulator is equal to the average heat exchange rate of all accumulators. If the heat exchange rate of the target accumulator is equal to the average heat exchange rate of all accumulators, it indicates that the refrigerant distribution of each accumulator in the air-conditioning system is balanced.

[0151] In some embodiments, in the solidified state and the state of not being completely liquefied, to determine whether the refrigerant distribution of each accumulator in the air-conditioning system is balanced, it can be determined by whether the refrigerant pressure loss of the target accumulator is equal to the average refrigerant pressure loss of all accumulators. If the refrigerant pressure loss of the target accumulator is equal to the average refrigerant pressure loss of all accumulators, it indicates that the refrigerant distribution of each accumulator in the air-conditioning system is balanced.

[0152] In some embodiments, in the completely liquefied state, to determine whether the refrigerant distribution of each accumulator in the air-conditioning system is balanced, it can be determined by whether the cooling capacity release of the target accumulator is equal to the average cooling capacity release of all accumulators. If the cooling capacity release of the target accumulator is equal to the average cooling capacity release of all accumulators, it indicates that the refrigerant distribution of each accumulator in the air-conditioning system is balanced.

[0153] In some embodiments, when the phase change material is water, to determine whether the water in the target accumulator freezes, the water temperature T of the water in the accumulator 水i can be compared with 1°C. When T 水i is greater than or equal to 1°C, it is determined to be in the unfrozen state, that is, the non-solidified state, and thus enter the non-solidified control process. When T 水i is less than 1°C, it is determined to be in the frozen state, that is, the solidified state, and thus enter the solidified control process.

[0154] In some embodiments, in the non-solidified state, to regulate the refrigerant circulation volume of the target accumulator, it includes: regulating the refrigerant circulation volume of the target accumulator according to the relationship between the heat exchange speed of the target accumulator and the average heat exchange speed of all accumulators.

[0155] In the above embodiments, the heat exchange speed of the accumulator refers to the amount of heat that the accumulator can absorb or release per unit time. Through the relationship between the heat exchange speed of the target accumulator and the average heat exchange speed of all accumulators, the heat exchange performance of each accumulator can be effectively evaluated, and the refrigerant circulation volume of the target accumulator can be regulated in a targeted manner, so as to balance the refrigerant distribution of each accumulator in the entire system and improve the heat exchange performance and reliability of the system.

[0156] In some embodiments, regulating the refrigerant circulation volume of the target accumulator according to the relationship between the heat exchange speed of the target accumulator and the average heat exchange speed of all accumulators includes:

[0157] If the heat exchange speed of the target accumulator is less than the average heat exchange speed of all accumulators, then adjust to increase the refrigerant circulation volume of the target cold storage;

[0158] If the heat exchange speed of the target accumulator is greater than the average heat exchange speed of all accumulators, then adjust to decrease the refrigerant circulation volume of the target cold storage.

[0159] In the above embodiments, if the heat exchange rate of the target accumulator is less than the average heat exchange rate of all accumulators, it indicates that the refrigerant distribution amount of the target accumulator is less than the average value. Therefore, it is necessary to adjust and increase the refrigerant circulation amount of the target accumulator to improve the heat exchange effect of the target accumulator, which is beneficial to the balanced refrigerant distribution of all accumulators in the whole system. If the heat exchange rate of the target accumulator is greater than the average heat exchange rate of all accumulators, it indicates that the refrigerant distribution amount of the target accumulator is more than the average value. Therefore, it is necessary to adjust and decrease the refrigerant circulation amount of the target accumulator to improve the heat exchange effect of other accumulators, which is beneficial to the balanced refrigerant distribution of all accumulators in the whole system.

[0160] In some embodiments, the relationship between the heat exchange rate of the target accumulator and the average heat exchange rate of all accumulators is obtained by the following method:

[0161] Compare the temperature of the phase change material in the target accumulator with the average value of the temperatures of the phase change materials in all accumulators.

[0162] In the above embodiments, the comparison between the temperature of the phase change material in the target accumulator and the average value of the temperatures of the phase change materials in all accumulators can intuitively reflect the heat exchange rate of the target accumulator, and the temperature of the phase change material is relatively easy to obtain and the operation is convenient.

[0163] In some embodiments, comparing the temperature of the phase change material in the target accumulator with the average value of the temperatures of the phase change materials in all accumulators includes:

[0164] If the temperature of the phase change material in the target accumulator is greater than the sum of the average value of the temperatures of the phase change materials in all accumulators and the temperature change value, it is determined that the heat exchange rate of the target accumulator is less than the average heat exchange rate of all accumulators; or

[0165] If the temperature of the phase change material in the target accumulator is less than the difference between the average value of the temperatures of the phase change materials in all accumulators and the temperature change value, it is determined that the heat exchange rate of the target accumulator is greater than the average heat exchange rate of all accumulators;

[0166] Wherein, the temperature change value is a set value.

[0167] In some embodiments, the setting range of the temperature change value is 1°C to 5°C. Optionally, the temperature change value is set to 2°C.

[0168] In the above embodiments, if the temperature of the phase change material in the target energy storage device is greater than the sum of the average temperature of the phase change materials in all energy storage devices and the temperature change value, it is determined that the heat exchange rate of the target energy storage device is less than the average heat exchange rate of all energy storage devices, and the refrigerant circulation volume of the target energy storage device is small, then the refrigerant circulation volume of the target cold storage device is adjusted to increase; if the temperature of the phase change material in the target energy storage device is less than the difference between the average temperature of the phase change materials in all energy storage devices and the temperature change value, it is determined that the heat exchange rate of the target energy storage device is greater than the average heat exchange rate of all energy storage devices, and the refrigerant circulation volume of the target energy storage device is large, then the refrigerant circulation volume of the target cold storage device is adjusted to decrease.

[0169] In the above embodiments, by setting a temperature change value, a certain margin can be provided for the comparison between temperatures, making the comparison result more adaptable and reliable. And when the temperature of the phase change material in the target energy storage device is less than or equal to the sum of the average temperature of the phase change materials in all energy storage devices and the temperature change value, and the temperature of the phase change material in the target energy storage device is greater than or equal to the difference between the average temperature of the phase change materials in all energy storage devices and the temperature change value, it indicates that the refrigerant distribution volume of the target energy storage device is equivalent to the average refrigerant distribution volume of all energy storage devices, and no refrigerant adjustment is required.

[0170] In some embodiments, according to the relationship between the heat exchange rate of the target energy storage device and the average heat exchange rate of all energy storage devices, to regulate the refrigerant circulation volume of the target energy storage device, further includes:

[0171] If the heat exchange rate of the target energy storage device is equal to the average heat exchange rate of all energy storage devices, then further according to the relationship between the outlet pipe temperature of the target energy storage device and the outlet pipe temperatures of all energy storage devices, to regulate the refrigerant circulation volume of the target energy storage device.

[0172] Among them, in the cold storage mode, the refrigerant transported by the external machine liquid pipe is sent to the energy storage device through the first port of the energy storage device, and then flows from the second port of the energy storage device to the external machine gas pipe. The pipe connected to the second port of the energy storage device is the outlet pipe of the energy storage device.

[0173] In the above embodiments, the heat exchange rate of the target energy storage device is equal to the average heat exchange rate of all energy storage devices, and the temperatures of the phase change materials in each energy storage device are similar. On this basis, further determine whether the outlet pipe temperatures of all energy storage devices are balanced, so as to prevent the situation that the temperature of the phase change material in the energy storage device is different due to the different refrigerant circulation volumes appearing again.

[0174] In some embodiments, according to the relationship between the outlet pipe temperature of the target energy storage device and the outlet pipe temperatures of all energy storage devices, to regulate the refrigerant circulation volume of the target energy storage device, includes:

[0175] If the outlet pipe temperature of the target accumulator is greater than the sum of the average value of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant distribution amount of the target accumulator is less than the average refrigerant distribution amount of all accumulators, and the refrigerant distribution amount of the target accumulator is adjusted to increase; or

[0176] If the outlet pipe temperature of the target accumulator is less than the difference between the average value of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant distribution amount of the target accumulator is greater than the average refrigerant distribution amount of all accumulators, and the refrigerant distribution amount of the target accumulator is adjusted to decrease.

[0177] Wherein, the temperature change value is a set value.

[0178] In some embodiments, the setting range of the temperature change value is 1°C to 5°C. Optionally, the temperature change value is set to 2°C.

[0179] In the above embodiments, by setting a temperature change value, a certain margin can be provided for temperature comparison, making the comparison result more adaptable and reliable. And when the outlet pipe temperature of the target accumulator is less than or equal to the sum of the average value of the outlet pipe temperatures of all accumulators and the temperature change value, and the outlet pipe temperature of the target accumulator is greater than or equal to the difference between the average value of the outlet pipe temperatures of all accumulators and the temperature change value, it indicates that the refrigerant distribution amount of the target accumulator is equivalent to the average refrigerant distribution amount of all accumulators, and no refrigerant adjustment is required.

[0180] In some embodiments, in the cold storage mode, the refrigerant transported by the external machine liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows from the second port of the accumulator to the external machine gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the external machine liquid pipe. The cold storage regulating valve is the cold storage regulating valve corresponding to the accumulator.

[0181] The implementation methods for adjusting and increasing the refrigerant circulation amount of the target cold storage device include:

[0182] When the opening degree of the cold storage regulating valve corresponding to the target cold storage device has not reached the maximum opening degree, by reducing the target superheat degree of the target accumulator to increase the opening degree of the corresponding cold storage regulating valve of the target cold storage device; or

[0183] When the opening degree of the cold storage regulating valve corresponding to the target cold storage device has reached the maximum opening degree, then by increasing the target superheat degree of the other accumulators except the target accumulator to reduce the opening degree of the cold storage regulating valves of the other accumulators.

[0184] In the above embodiment, in the cold storage mode, the opening of the cold storage regulating valve of the target accumulator is not directly adjusted, but the opening of the cold storage regulating valve is indirectly adjusted by adjusting the target superheat of the target accumulator, which can alleviate the conflict between the opening adjustment of the cold storage regulating valve and the superheat control process built into the air-conditioning control program, so that the system dynamically adjusts the opening of the cold storage regulating valve according to the set target superheat and changes in actual operating conditions, thereby improving the flexibility and adaptability of the response and enhancing the stability of the system.

[0185] In some embodiments, in the cold storage mode, the refrigerant transported by the external machine liquid pipe is delivered to the accumulator through the first port of the accumulator, and then flows from the second port of the accumulator to the external machine air pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the external machine liquid pipe.

[0186] The implementation methods of adjusting and reducing the refrigerant circulation amount of the target cold storage device include:

[0187] By increasing the target superheat of the target accumulator, the opening degree of the cold storage regulating valve corresponding to the target accumulator is reduced.

[0188] In the above embodiment, in the cold storage mode, the opening of the cold storage regulating valve corresponding to the target accumulator is not directly adjusted, but the opening of the cold storage regulating valve is indirectly adjusted by adjusting the target superheat of the target accumulator, which can alleviate the problem of conflict between the opening adjustment of the cold storage regulating valve and the superheat control process built into the air-conditioning control program, so that the system dynamically adjusts the opening of the cold storage regulating valve according to the set target superheat and changes in actual operating conditions, thereby improving the flexibility and adaptability of the response and enhancing the stability of the system.

[0189] In the above embodiment, in the unsolidified stage in the cold storage mode, firstly, it is judged whether the temperature of the phase change material in the target accumulator is near the average temperature. If the temperature is significantly different, it is judged that the refrigerant is unbalanced and corresponding adjustments are made. After determining that the temperature of the phase change material of the target accumulator is near the average temperature, further judgment is made based on whether the outlet pipe temperature is near the average outlet pipe temperature to alleviate the problem of significant temperature differences of the phase change material of the target accumulator and improve the balance of refrigerant distribution.

[0190] In some embodiments, in the solidified state, regulating the refrigerant circulation amount of the target accumulator includes regulating the refrigerant circulation amount of the target accumulator according to a relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators.

[0191] In the above embodiments, in a refrigeration system, the flow of refrigerant will generate a certain pressure loss, and this pressure loss is usually related to the refrigerant circulation volume. Therefore, by monitoring the pressure loss of the accumulator, the refrigerant circulation volume of the accumulator can be indirectly understood for regulating the refrigerant circulation volume of the target accumulator.

[0192] In some embodiments, according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, to regulate the refrigerant circulation volume of the target accumulator, it includes:

[0193] If the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, then adjust to reduce the refrigerant circulation volume of the target cold storage device;

[0194] If the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators, then adjust to increase the refrigerant circulation volume of the target cold storage device.

[0195] In the above embodiments, if the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, it means that the refrigerant flow resistance in the target accumulator is small, and the refrigerant circulation volume of the target accumulator is relatively high compared to its heat exchange demand. Therefore, by reducing the refrigerant circulation volume of the target cold storage device, the distribution of the refrigerant is adjusted to make it more in line with the actual heat exchange demand, ensuring that the refrigerant flow of the entire system is more balanced, improving the overall heat exchange efficiency and optimizing the system performance. If the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators, it means that the refrigerant flow resistance in the target accumulator is large, and the refrigerant circulation volume of the target accumulator is relatively low compared to its heat exchange demand. Therefore, by increasing the refrigerant circulation volume of the target cold storage device, the distribution of the refrigerant is adjusted to make it more in line with the actual heat exchange demand, ensuring that the refrigerant flow of the entire system is more balanced, improving the overall heat exchange efficiency and optimizing the system performance.

[0196] In some embodiments, the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators is obtained by the following method:

[0197] Compare the inlet pipe temperature in the target accumulator with the average value of the inlet pipe temperatures in all accumulators.

[0198] Among them, in the cold storage mode, the refrigerant transported by the external machine liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows out of the accumulator from the second port to the external machine gas pipe. The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator.

[0199] In the above embodiment, in the cold storage mode, the refrigerant will experience a pressure drop after passing through the cold storage regulating valve (such as a throttling element, an expansion valve, etc.), thereby causing the refrigerant temperature to drop. Therefore, the change in the inlet pipe temperature of the accumulator is related to the pressure drop experienced by the refrigerant: the greater the pressure loss, the more obvious the temperature drop; and vice versa. Therefore, by detecting the actual temperature of the refrigerant at the inlet pipe of the accumulator, the refrigerant pressure loss on this path can be indirectly obtained.

[0200] In some embodiments, comparing the inlet pipe temperature in the target accumulator with the average of the inlet pipe temperatures in all accumulators includes:

[0201] If the inlet pipe temperature in the target accumulator is greater than the sum of the average value of the inlet pipe temperatures in all accumulators and the temperature change value, it is determined that the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators; or

[0202] If the inlet pipe temperature in the target accumulator is less than the difference between the average value of the inlet pipe temperatures in all accumulators and the temperature change value, it is determined that the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators.

[0203] Among them, the temperature change value is the set value.

[0204] In some embodiments, the temperature change value is set in a range of 1° C. to 5° C. Optionally, the temperature change value is set to 2° C.

[0205] In the above embodiment, if the inlet pipe temperature of the target accumulator is greater than the sum of the average value of the inlet pipe temperatures in all accumulators and the temperature change value, it means that the refrigerant of the target accumulator has experienced a smaller pressure drop, and there may be a problem of excessive flow; if the inlet pipe temperature of the target accumulator is less than the difference between the average value of the inlet pipe temperatures in all accumulators and the temperature change value, it means that the refrigerant of the target accumulator has experienced a larger pressure drop, and there may be a problem of excessive flow; therefore, the inlet pipe temperature of the accumulator can be used as a feedback signal to dynamically adjust the refrigerant distribution of each accumulator to achieve system flow balance and performance optimization.

[0206] In the above embodiment, by setting a temperature change value, the temperature comparison can have a certain margin, making the comparison result more adaptable and reliable. And when the inlet pipe temperature in the target accumulator is less than or equal to the sum of the average value of the inlet pipe temperatures in all accumulators and the temperature change value, and the inlet pipe temperature in the target accumulator is greater than or equal to the difference between the average value of the inlet pipe temperatures in all accumulators and the temperature change value, it means that the refrigerant distribution amount of the target accumulator is equivalent to the average refrigerant distribution amount of all accumulators, and no refrigerant adjustment is required.

[0207] In some embodiments, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the energy accumulator through the first port of the energy accumulator, and then flows from the second port of the energy accumulator to the outdoor unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the energy accumulator and the outdoor unit liquid pipe;

[0208] The implementation methods for adjusting and increasing the refrigerant circulation volume of the target cold storage device include:

[0209] By reducing the target superheat degree of the target energy accumulator to increase the opening degree of the cold storage regulating valve of the target energy accumulator.

[0210] In the above embodiments, in the cold storage mode, instead of directly adjusting the opening degree of the cold storage regulating valve of the target energy accumulator, the opening degree of the cold storage regulating valve is indirectly adjusted by adjusting the target superheat degree of the target energy accumulator, which can alleviate the problem of conflict between the opening degree adjustment of the cold storage regulating valve and the built-in superheat degree control process in the air-conditioning control program, enabling the system to dynamically adjust the opening degree of the cold storage regulating valve according to the set target superheat degree and the changes in the actual operating conditions, thereby improving the flexibility and adaptability of the response and enhancing the stability of the system.

[0211] In some embodiments, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the energy accumulator through the first port of the energy accumulator, and then flows from the second port of the energy accumulator to the outdoor unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the energy accumulator and the outdoor unit liquid pipe.

[0212] The implementation methods for adjusting and reducing the refrigerant circulation volume of the target cold storage device include:

[0213] When the opening degree of the cold storage regulating valve of the target cold storage device has not reached the minimum opening degree, by increasing the target superheat degree of the target energy accumulator to reduce the opening degree of the cold storage regulating valve of the target cold storage device; or

[0214] When the opening degree of the cold storage regulating valve of the target cold storage device has reached the minimum opening degree, then by reducing the target superheat degree of the energy accumulators other than the target energy accumulator to increase the opening degree of the cold storage regulating valves of the other energy accumulators.

[0215] In the above embodiments, in the cold storage mode, instead of directly adjusting the opening degree of the cold storage regulating valve of the target energy accumulator, the opening degree of the cold storage regulating valve is indirectly adjusted by adjusting the target superheat degree of the target energy accumulator, which can alleviate the problem of conflict between the opening degree adjustment of the cold storage regulating valve and the built-in superheat degree control process in the air-conditioning control program, enabling the system to dynamically adjust the opening degree of the cold storage regulating valve according to the set target superheat degree and the changes in the actual operating conditions, thereby improving the flexibility and adaptability of the system response and enhancing the stability of the system.

[0216] In some embodiments, when in an incompletely liquefied state, the refrigerant circulation volume of the target accumulator is regulated, including: regulating the refrigerant circulation volume of the target accumulator according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators.

[0217] In the above embodiments, in the refrigeration system, the flow of the refrigerant will generate a certain pressure loss, and this pressure loss is related to the refrigerant circulation volume. Therefore, by monitoring the pressure loss of the accumulator, the refrigerant circulation volume of the accumulator can be indirectly understood for regulating the refrigerant circulation volume of the target accumulator.

[0218] In some embodiments, regulating the refrigerant circulation volume of the target accumulator according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators includes:

[0219] If the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, then adjust to reduce the refrigerant circulation volume of the target cold storage device;

[0220] If the refrigerant pressure loss of the target accumulator is greater than the refrigerant pressure loss of all accumulators, then adjust to increase the refrigerant circulation volume of the target cold storage device.

[0221] In the above embodiments, if the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, it means that the flow resistance of the refrigerant in the target accumulator is small, and the refrigerant circulation volume of the target accumulator is relatively high compared to its heat exchange demand. Therefore, by reducing the refrigerant circulation volume of the target cold storage device, the distribution of the refrigerant is adjusted to make it more in line with the actual heat exchange demand, ensuring that the refrigerant flow rate of the entire system is more balanced, improving the overall heat exchange efficiency and optimizing the system performance. If the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators, it means that the flow resistance of the refrigerant in the target accumulator is large, and the refrigerant circulation volume of the target accumulator is relatively low compared to its heat exchange demand. Therefore, by increasing the refrigerant circulation volume of the target cold storage device, the distribution of the refrigerant is adjusted to make it more in line with the actual heat exchange demand, ensuring that the refrigerant flow rate of the entire system is more balanced, improving the overall heat exchange efficiency and optimizing the system performance.

[0222] In some embodiments, the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators is obtained by the following method:

[0223] Compare the outlet pipe temperature in the target accumulator with the average value of the outlet pipe temperatures in all accumulators.

[0224] Among them, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. Among them, the pipe connected to the second port of the accumulator is the outlet pipe of the accumulator.

[0225] In the above embodiment, in the cold release mode, the refrigerant flows from the outlet pipe of the accumulator to the accumulator. The pressure of the refrigerant flowing to the accumulator drops during the flow process, resulting in a decrease in the refrigerant temperature. Therefore, the temperature change of the outlet pipe of the accumulator is related to the pressure drop experienced by the refrigerant: the greater the pressure loss, the more obvious the temperature decrease; vice versa. Therefore, by detecting the actual temperature of the refrigerant at the outlet pipe of the accumulator, the pressure loss of the refrigerant on this path can be indirectly obtained.

[0226] In some embodiments, comparing the outlet pipe temperature in the target accumulator with the average value of the outlet pipe temperatures in all accumulators includes:

[0227] If the outlet pipe temperature in the target accumulator is greater than the sum of the average value of the outlet pipe temperatures in all accumulators and the temperature change value, the refrigerant pressure loss in the target accumulator is less than the refrigerant pressure loss in all accumulators; or

[0228] If the outlet pipe temperature in the target accumulator is less than the difference between the average value of the outlet pipe temperatures in all accumulators and the temperature change value, the refrigerant pressure loss in the target accumulator is more than the refrigerant pressure loss in all accumulators.

[0229] Among them, the temperature change value is a set value.

[0230] In some embodiments, the setting range of the temperature change value is 1°C to 5°C. Optionally, the temperature change value is set to 2°C.

[0231] In the above embodiment, if the outlet pipe temperature of the target accumulator is greater than the sum of the average value of the outlet pipe temperatures in all accumulators and the temperature change value, it indicates that the refrigerant in the target accumulator has experienced a small pressure drop, and there may be a problem of excessive flow; if the outlet pipe temperature of the target accumulator is less than the difference between the average value of the outlet pipe temperatures in all accumulators and the temperature change value, it indicates that the refrigerant in the target accumulator has experienced a large pressure drop, and there may be a problem of insufficient flow; therefore, the outlet pipe temperature of the accumulator can be used as a feedback signal to dynamically adjust the refrigerant distribution of each accumulator, realizing system flow balance and performance optimization.

[0232] In the above embodiments, by setting a temperature change value, the temperature comparison can have a certain margin, making the comparison result more adaptable and reliable. And if the outlet pipe temperature in the target accumulator is less than or equal to the sum of the average outlet pipe temperature of all accumulators and the temperature change value, and the outlet pipe temperature in the target accumulator is greater than or equal to the difference between the average outlet pipe temperature of all accumulators and the temperature change value, it indicates that the refrigerant distribution amount in the target accumulator is equivalent to the average refrigerant distribution amount of all accumulators, and no refrigerant adjustment is required.

[0233] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe.

[0234] The implementation methods for adjusting and increasing the refrigerant circulation amount of the target cold accumulator include:

[0235] When the opening degree of the cold release regulating valve of the target cold accumulator has not reached the maximum opening degree, adjust and increase the opening degree of the cold release regulating valve of the target cold accumulator; or

[0236] When the opening degree of the cold release regulating valve of the target cold accumulator has reached the maximum opening degree, then adjust and decrease the opening degree of the cold release regulating valves of the other accumulators except the target accumulator.

[0237] In the above embodiments, in the cold release mode, there is no control process for the superheat or subcooling degree of the accumulator in the air conditioner control program. Therefore, the opening degree of the cold release regulating valve can be directly adjusted to balance the refrigerant circulation amounts of each accumulator.

[0238] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe.

[0239] The implementation methods for adjusting and decreasing the refrigerant circulation amount of the target cold accumulator include:

[0240] Decrease the opening degree of the cold release regulating valve of the target accumulator.

[0241] In the above embodiments, in the cold release mode, there is no control process for the superheat or subcooling degree of the accumulator in the air conditioner control program. Therefore, the opening degree of the cold release regulating valve can be directly adjusted to balance the refrigerant circulation amounts of each accumulator.

[0242] In some embodiments, in the fully liquefied state, the regulation of the refrigerant circulation amount of the target accumulator includes: regulating the refrigerant circulation amount of the target accumulator according to the relationship between the cold quantity release amount of the target accumulator and the average cold quantity release amount of all accumulators.

[0243] In the above process, during the process of the refrigerant flowing through the accumulator, the phase change material in the accumulator releases the stored cooling capacity to the refrigerant. By according to the relationship between the cooling capacity release of the target accumulator and the average cooling capacity release of all accumulators, the performance of each accumulator can be effectively evaluated, and the refrigerant circulation volume of the target accumulator can be regulated targeted, so as to balance the refrigerant distribution of each accumulator in the whole system and improve the heat exchange performance and reliability of the system.

[0244] In some embodiments, according to the relationship between the cooling capacity release of the target accumulator and the average cooling capacity release of all accumulators, to regulate the refrigerant circulation volume of the target accumulator, including:

[0245] If the cooling capacity release of the target accumulator is greater than the average cooling capacity release of all accumulators, then adjust to reduce the refrigerant circulation volume of the target cold storage device;

[0246] If the cooling capacity release of the target accumulator is less than the average cooling capacity release of all accumulators, then adjust to increase the refrigerant circulation volume of the target cold storage device.

[0247] In the above embodiments, if the cooling capacity release of the target accumulator is greater than the average cooling capacity release of all accumulators, it is determined that the refrigerant circulation volume in the target accumulator is larger, then adjust to reduce the refrigerant circulation volume of the target cold storage device. If the cooling capacity release of the target accumulator is less than the average cooling capacity release of all accumulators, it is determined that the refrigerant circulation volume in the target accumulator is smaller, then adjust to increase the refrigerant circulation volume of the target cold storage device, so as to facilitate the balance of the refrigerant distribution of each accumulator in the whole system.

[0248] In some embodiments, the relationship between the cooling capacity release of the target accumulator and the average cooling capacity release of all accumulators is obtained by the following method:

[0249] Compare the temperature of the phase change material in the target accumulator with the average value of the temperatures of the phase change materials in all accumulators.

[0250] In the above embodiments, the comparison of the temperature of the phase change material in the target accumulator with the average value of the temperatures of the phase change materials in all accumulators can relatively intuitively reflect the cooling capacity release of the target accumulator, and the temperature acquisition of the phase change material is relatively easy and the operation is convenient.

[0251] In some embodiments, comparing the temperature of the phase change material in the target accumulator with the average value of the temperatures of the phase change materials in all accumulators includes:

[0252] If the temperature of the phase change material in the target accumulator is greater than the sum of the average temperature of the phase change materials in all accumulators and the temperature change value, it is determined that the cooling capacity release of the target accumulator is greater than the average cooling capacity release of all accumulators; or

[0253] If the temperature of the phase change material in the target accumulator is less than the difference between the average temperature of the phase change materials in all accumulators and the temperature change value, the cooling capacity release of the target accumulator is less than the average cooling capacity release of all accumulators.

[0254] Wherein, the temperature change value is a set value.

[0255] In some embodiments, the setting range of the temperature change value is 1°C to 5°C. Optionally, the temperature change value is set to 2°C.

[0256] In the above embodiments, if the temperature of the phase change material in the target accumulator is greater than the sum of the average temperature of the phase change materials in all accumulators and the temperature change value, it is determined that the cooling capacity release of the target accumulator is greater than the average cooling capacity release of all accumulators, and the refrigerant circulation amount in the target accumulator is relatively large, then the refrigerant circulation amount of the target accumulator should be reduced; if the temperature of the phase change material in the target accumulator is less than the difference between the average temperature of the phase change materials in all accumulators and the temperature change value, the cooling capacity release of the target accumulator is less than the average cooling capacity release of all accumulators, and the refrigerant circulation amount in the target accumulator is relatively small, then the refrigerant circulation amount of the target accumulator should be increased.

[0257] In the above embodiments, by setting a temperature change value, a certain margin can be provided for the comparison between temperatures, making the comparison result more adaptable and reliable. And if the temperature of the phase change material in the target accumulator is less than or equal to the sum of the average temperature of the phase change materials in all accumulators and the temperature change value, and the temperature of the phase change material in the target accumulator is greater than or equal to the difference between the average temperature of the phase change materials in all accumulators and the temperature change value, it indicates that the refrigerant distribution amount of the target accumulator is equivalent to the average refrigerant distribution amount of all accumulators, and no refrigerant adjustment is required.

[0258] In some embodiments, according to the relationship between the cooling capacity release of the target accumulator and the average cooling capacity release of all accumulators, the refrigerant circulation amount of the target accumulator is regulated, including:

[0259] If the cooling capacity release of the target accumulator is equal to the average cooling capacity release of all accumulators, then further according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, the refrigerant circulation amount of the target accumulator is regulated.

[0260] In the above embodiments, in the refrigeration system, the flow of the refrigerant will generate a certain pressure loss, and this pressure loss is usually related to the refrigerant circulation volume. Therefore, by monitoring the pressure loss of the accumulator, the refrigerant circulation volume of the accumulator can be indirectly understood for regulating the refrigerant circulation volume of the target accumulator.

[0261] In some embodiments, according to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, to regulate the refrigerant circulation volume of the target accumulator, it includes:

[0262] If the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, then adjust to reduce the refrigerant circulation volume of the target cold storage device;

[0263] If the refrigerant pressure loss of the target accumulator is more than the average refrigerant pressure loss of all accumulators, then adjust to increase the refrigerant circulation volume of the target cold storage device.

[0264] In the above embodiments, if the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, it means that the flow resistance of the refrigerant in the target accumulator is small, and the refrigerant circulation volume of the target accumulator is relatively high compared to its heat exchange demand. Therefore, by reducing the refrigerant circulation volume of the target cold storage device, the distribution of the refrigerant is adjusted to make it more in line with the actual heat exchange demand, ensuring that the refrigerant flow rate of the entire system is more balanced, improving the overall heat exchange efficiency and optimizing the system performance. If the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators, it means that the flow resistance of the refrigerant in the target accumulator is large, and the refrigerant circulation volume of the target accumulator is relatively low compared to its heat exchange demand. Therefore, by increasing the refrigerant circulation volume of the target cold storage device, the distribution of the refrigerant is adjusted to make it more in line with the actual heat exchange demand, ensuring that the refrigerant flow rate of the entire system is more balanced, improving the overall heat exchange efficiency and optimizing the system performance.

[0265] In some embodiments, the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators is obtained by the following method:

[0266] Compare the outlet pipe temperature of the target accumulator with the average value of the outlet pipe temperatures of all accumulators;

[0267] Wherein, in the cold release mode, the refrigerant transported by the external unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the internal unit liquid pipe. Among them, the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator.

[0268] In the above embodiment, in the cold release mode, the refrigerant flows from the outlet pipe of the accumulator to the accumulator. The refrigerant flowing to the accumulator experiences a pressure drop during the flow, which causes the refrigerant temperature to drop. Therefore, the change in the outlet pipe temperature of the accumulator is related to the pressure drop experienced by the refrigerant: the greater the pressure loss, the more obvious the temperature drop; and vice versa. Therefore, by detecting the actual temperature of the refrigerant at the outlet pipe of the accumulator, the refrigerant pressure loss on the path can be indirectly obtained.

[0269] In some embodiments, comparing the outlet pipe temperature of the target accumulator with the average of the outlet pipe temperatures of all accumulators includes:

[0270] If the outlet pipe temperature of the target accumulator is greater than the sum of the average value of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators; or

[0271] If the outlet pipe temperature of the target accumulator is less than the difference between the average value of the outlet pipe temperatures in all accumulators and the temperature change value, the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators.

[0272] Among them, the temperature change value is the set value.

[0273] In some embodiments, the temperature change value is set in a range of 1° C. to 5° C. Optionally, the temperature change value is set to 2° C.

[0274] In the above embodiment, if the outlet pipe temperature of the target accumulator is greater than the sum of the average value of the outlet pipe temperatures in all accumulators and the temperature change value, it means that the refrigerant of the target accumulator has experienced a small pressure drop, and there may be a problem of too large a flow rate; if the outlet pipe temperature of the target accumulator is less than the difference between the average value of the outlet pipe temperatures in all accumulators and the temperature change value, it means that the refrigerant of the target accumulator has experienced a large pressure drop, and there may be a problem of too small a flow rate; therefore, the outlet pipe temperature of the accumulator can be used as a feedback signal to dynamically adjust the refrigerant distribution of each accumulator to achieve system flow balance and performance optimization.

[0275] In the above embodiment, by setting a temperature change value, the temperature comparison can have a certain margin, making the comparison result more adaptable and reliable. And if the outlet pipe temperature in the target accumulator is less than or equal to the sum of the average value of the outlet pipe temperatures in all accumulators and the temperature change value, and the outlet pipe temperature in the target accumulator is greater than or equal to the difference between the average value of the outlet pipe temperatures in all accumulators and the temperature change value, it means that the refrigerant distribution amount of the target accumulator is equivalent to the average refrigerant distribution amount of all accumulators, and no refrigerant adjustment is required.

[0276] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe.

[0277] The implementation methods for adjusting and increasing the refrigerant circulation volume of the target accumulator include:

[0278] If the opening degree of the cold release regulating valve of the target accumulator has not reached the maximum opening degree, then adjust and increase the opening degree of the cold release regulating valve of the target accumulator; or

[0279] If the opening degree of the cold release regulating valve of the target accumulator has reached the maximum opening degree, then adjust and decrease the opening degree of the cold release regulating valves of the other accumulators except the target accumulator.

[0280] In the above embodiments, in the cold release mode, there is no control process for the superheat or subcooling degree of the accumulator in the air conditioner control program. Therefore, the opening degree of the cold release regulating valve can be directly adjusted to balance the refrigerant circulation volume of each accumulator.

[0281] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe:

[0282] The implementation methods for adjusting and decreasing the refrigerant circulation volume of the target accumulator include:

[0283] Adjust and decrease the opening degree of the cold release regulating valve of the target accumulator.

[0284] In the above embodiments, in the cold release mode, there is no control process for the superheat or subcooling degree of the accumulator in the air conditioner control program. Therefore, the opening degree of the cold release regulating valve can be directly adjusted to balance the refrigerant circulation volume of each accumulator.

[0285] In some embodiments, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows from the second port of the accumulator to the outdoor unit gas pipe. The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator, and the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator. According to at least one of the following three comparison results, the refrigerant circulation volume of the target accumulator is regulated:

[0286] Comparison of the temperature of the phase change material in the target accumulator with the average value of the temperatures of the phase change materials in all accumulators;

[0287] Comparison of the outlet pipe temperature of the target accumulator with the average value of the outlet pipe temperatures in all accumulators; and

[0288] The inlet pipe temperature of the target accumulator is compared with the average value of the inlet pipe temperatures in all accumulators.

[0289] In the above embodiments, the temperature of the phase change material in the target accumulator, the outlet pipe temperature of the target accumulator, and the inlet pipe temperature of the target accumulator can be easily obtained. By comparing the respective parameter temperatures of the target accumulator with the average temperature, the refrigerant circulation amount of the target accumulator can be reflected, which is conducive to regulating the refrigerant circulation amount of the target accumulator, making the refrigerant flow of the entire system more balanced, improving the overall heat exchange efficiency, and optimizing the system performance.

[0290] In some embodiments, in the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. Among them, the pipe connected to the second port of the accumulator is the outlet pipe of the accumulator. According to at least one of the following two comparison results, the refrigerant circulation amount of the target accumulator is regulated:

[0291] The comparison of the temperature of the phase change material in the target accumulator with the average value of the temperatures of the phase change materials in all accumulators; and

[0292] The comparison of the outlet pipe temperature of the target accumulator with the average value of the outlet pipe temperatures in all accumulators.

[0293] In the above embodiments, the temperature of the phase change material in the target accumulator and the outlet pipe temperature of the target accumulator can be easily obtained. By comparing the respective parameter temperatures of the target accumulator with the average temperature, the refrigerant circulation amount of the target accumulator can be reflected, which is conducive to regulating the refrigerant circulation amount of the target accumulator, making the refrigerant flow of the entire system more balanced, improving the overall heat exchange efficiency, and optimizing the system performance.

[0294] In some embodiments, each accumulator among multiple accumulators is used as the target accumulator to monitor the refrigerant circulation amount once. If the refrigerant circulation amounts of all accumulators meet the requirements, then after an interval of the first preset time, each accumulator among the multiple accumulators is used as the target accumulator to monitor the refrigerant circulation amount once again. If the refrigerant circulation amount of any one of the multiple accumulators does not meet the requirements, then the refrigerant circulation amount of this accumulator is regulated. After the regulation is completed and the second preset time is reached, each accumulator among the multiple accumulators is used as the target accumulator to monitor the refrigerant circulation amount once again; wherein, the second preset time is greater than the first preset time.

[0295] In the above embodiments, by setting the first preset time, the problem of overly frequent detection and excessive data reading and writing can be avoided.

[0296] In the above embodiments, by setting a second preset time, and the second preset time being greater than the first preset time, after each adjustment operation of the regulating valve, a certain reaction time can be given, so that the change in the opening degree of the regulating valve can be fully reflected in the change in the refrigerant flow state.

[0297] In some embodiments, the values of the first preset time and the second preset time are set manually. The value range of the first preset time can be 10S to 80s. Optionally, the first preset time is taken as 40s. The value range of the second preset time is 1min to 10min. Optionally, the first preset time is taken as 5min.

[0298] The following will Figure 4 be described in detail in conjunction with the attached Figure 7 drawings the control method of the air conditioning system.

[0299] The control method of the air conditioning system provided by the embodiments of the present disclosure is divided into the control of the cold storage mode and the control of the cold release mode.

[0300] For the cold storage mode, distinguishing between the uncured situation and the cured situation of the phase change material in the accumulator, methods for judging whether the refrigerant is evenly distributed among the accumulators and adjustment methods are respectively proposed.

[0301] For the cold release mode, distinguishing between the unliquefied situation and the liquefied situation of the phase change material in the accumulator, methods for judging whether the refrigerant is evenly distributed among the accumulators and adjustment methods are respectively proposed.

[0302] According to the control method of the air conditioning system provided by the embodiments of the present disclosure, it is possible to promote the even distribution of the refrigerant among the accumulators, each accumulator can have a good heat exchange effect, achieve better cold storage energy efficiency and cold release energy efficiency, and reduce the occurrence probability of liquid accumulation, thereby improving the system reliability.

[0303] The control method of the air conditioning system provided by the embodiments of the present disclosure specifically includes the following steps.

[0304] Any one of the multiple accumulators is used as the target accumulator, and the number of the target accumulator is the i-th accumulator. During the working process, the judgment and control of steps S101 to S407 are sequentially performed on each accumulator.

[0305] The judgment of steps S101 to S407 is a periodic cyclic judgment. It is detected once every interval of a first preset time t1 and enters the corresponding control. During the detection process, if any control command (such as changing the opening degree of the regulating valve) is entered, then after the regulation according to the control command is completed, it enters the next detection cycle after an interval of a second preset time t2. If no control command is entered, it enters the next detection cycle after an interval of the first preset time t1.

[0306] In the above embodiments, by setting the first preset time t1, the problems of overly frequent detection and excessive data reading and writing are avoided.

[0307] In the above embodiments, by setting the second preset time t2, after each adjustment action of the regulating valve, a certain reaction time can be given, so that the change in the opening of the regulating valve can be fully reflected in the change in the refrigerant flow state.

[0308] In some embodiments, the values of the first preset time t1 and the second preset time t2 are both set manually. The value range of the first preset time t1 can be 10S to 80s. Optionally, the first preset time t1 is taken as 40s. The value range of the second preset time t2 is 0 to 10 min. Optionally, the second preset time t2 is taken as 5 min.

[0309] In the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows out of the second port of the accumulator to the outdoor unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the outdoor unit liquid pipe. Definition: The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator, and the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator.

[0310] The cold storage regulating valve can be a throttling element or an expansion valve. For example: the cold storage regulating valve is Figure 3 the cold storage expansion valve 102 in

[0311] In the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe. Definition: The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator, and the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator.

[0312] The cold release regulating valve can be a throttling element or an expansion valve. For example: the cold release regulating valve is Figure 4 the cold release expansion valve 107 in

[0313] The following regulation process is described by taking the phase change material in the accumulator as water as an example. To determine whether the water in the target accumulator freezes, the water temperature T of the water in the accumulator 水i can be compared with 1°C. When T 水i is greater than or equal to 1°C, it is judged as the unfrozen state, that is, the uncured state, and enters the unfrozen control process. When T 水i is less than 1°C, it is judged as the frozen state, that is, the cured state, and enters the frozen control process.

[0314] An internal temperature sensing element 109 is provided inside the energy storage device, and the internal temperature sensing element 109 is used to detect the water temperature inside the energy storage device. An inlet pipe temperature sensing element 108 is provided at the inlet pipe of the energy storage device, and the inlet pipe temperature sensing element 108 is used to detect the temperature of the inlet pipe of the energy storage device. An outlet pipe temperature sensing element 105 is provided at the outlet pipe of the energy storage device, and the outlet pipe temperature sensing element 105 is used to detect the temperature of the outlet pipe of the energy storage device.

[0315] 1. The air conditioning system is in the chilled water storage mode

[0316] When in the chilled water storage mode, it is judged whether the water in the energy storage device 2 freezes according to the measured temperature of the internal temperature sensing element 109. Step S101 is performed to judge whether T 水i is greater than or equal to 1 °C. Considering that the measured temperature in the water is in a fluctuating state, whether the measured temperature T 水i is not less than 1 °C is used as the judgment criterion. When T 水i ≥ 1 °C, it is judged that the water in the energy storage device does not freeze, and the non-freezing control process is executed; when T 水i < 1 °C, it is judged that the water in the energy storage device freezes, and the freezing control process is executed.

[0317] 1.1 Non-freezing control process (refer to Figure 5 )

[0318] Proceed from step S101 to step S102. Calculate the average temperature T 水均 of the water temperatures in all operating energy storage devices, and perform the judgment in step S102. Compare the water temperature T 水i of the i-th energy storage device with T 水均 to judge whether T 水i is greater than T 水均 + ΔT1.

[0319] If T 水i > T 水均 + ΔT1, it means that the water temperature of the i-th energy storage device is significantly higher than the average water temperature, the heat exchange rate of the i-th energy storage device is less than the average heat exchange rate, and the refrigerant distribution amount is less than the average value. Therefore, it is necessary to increase its refrigerant circulation amount to enhance its heat exchange. Among them, ΔT1 is a change value set artificially, and its value range can be 1 °C to 5 °C. Optionally, the value of ΔT1 is 2 °C.

[0320] If the judgment in step S102 is "yes", proceed to step S103 to judge whether the chilled water expansion valve opening EEV i of the i-th energy storage device is equal to the maximum expansion valve opening EEV max . Compare the chilled water expansion valve opening EEV i of the i-th energy storage device with the maximum expansion valve opening EEV max . If at this time EEV i ≠ EEV max, it indicates that the cold storage expansion valve of the i-th accumulator has not been fully opened yet, and the opening of the cold storage expansion valve of the i-th accumulator can be further increased to increase the refrigerant circulation volume. During the cold storage process, the expansion valve opening is not directly adjusted, but by changing the target superheat DT of the accumulator i to achieve this. Therefore, reduce the target superheat of the i-th accumulator, making DT i = DT i -ΔDT1, and the opening of the expansion valve will increase accordingly. If at this time EEV i = EEV max， it indicates that the cold storage expansion valve has been fully opened and cannot be further increased to increase the refrigerant circulation volume. Then, it is necessary to reduce the opening of the cold storage expansion valves of all other accumulators (denoted by subscript j) to achieve refrigerant balance. Therefore, make DT j = DT j +ΔDT1. Among them, ΔDT1 is a manually set change value, and its value range is 1°C to 5°C. Optionally, ΔDT1 can be taken as 2°C.

[0321] If the judgment in step S102 is "no", then it enters step S104 to judge whether T 水i is less than T 水均 -ΔT1. Step S104 compares the water temperature T 水i of the i-th accumulator with T 水均 again. If T 水i < T 水均 -ΔT1, it indicates that the water temperature of the i-th accumulator is significantly lower than the average water temperature, the heat exchange rate of the i-th accumulator is higher than the average level, and the refrigerant distribution volume is more than the average value. Therefore, it is necessary to reduce its refrigerant circulation volume. Therefore, increase the target superheat DT i of the i-th accumulator, making DT i = DT i +ΔDT1, and the opening of the expansion valve will decrease accordingly. (In the non-freezing stage, the minimum opening EEV min can be not set, and the expansion valve opening does not need to be compared with the minimum opening. Because according to experience, the expansion valve opening is always large at this time and will not reach the lower limit.)

[0322] If the judgment in step S104 is still "no", it indicates that the water temperatures of all accumulators are similar. On this basis, judge whether the outlet pipe temperatures of the accumulators are balanced to prevent the situation where the refrigerant circulation volumes are different again due to the water temperatures of the accumulators, resulting in temperature differences.

[0323] Enter step S105 to compare the outlet pipe temperature T 出i of the i-th accumulator with the average outlet pipe temperature T 出均 of all accumulators. If the judgment in step S105 is "yes", that is, T 出i > T 出均+ΔT2, it indicates that the refrigerant distribution amount of the i-th energy accumulator is less than the average value. Therefore, it is necessary to increase its refrigerant circulation amount to enhance its heat exchange. Among them, ΔT2 is a change value set artificially, and its value range is 1°C to 5°C. Optionally, ΔT2 can be taken as 2°C.

[0324] Proceed to step S106. Open the cold storage expansion valve EEV of the i-th energy accumulator i Compare it with the maximum opening degree EEV of the expansion valve max If at this time EEV i ≠EEV max , it indicates that the cold storage expansion valve of the i-th energy accumulator has not been opened to the maximum, and it can be continuously increased to increase the refrigerant circulation amount. Then, reduce the target superheat DT of the i-th energy accumulator i , let DT i = DT i -ΔDT2 to increase the opening degree of the expansion valve. If at this time EEV i = EEV max， It indicates that the cold storage expansion valve has been opened to the maximum and cannot be continuously increased to increase the refrigerant circulation amount. Then, it is necessary to reduce the cold storage expansion valves of the other energy accumulators. Therefore, let DT j = DT j +ΔDT2. Among them, ΔDT2 is a change value set artificially, and its value range is 1°C to 5°C. Optionally, ΔDT2 can be taken as 2°C.

[0325] If the judgment in step S105 is "no", then proceed to step S107. Compare the outlet pipe temperature T of the i-th energy accumulator 出i with the average outlet pipe temperature T of all operating energy accumulators 出均 . If the judgment in step S107 is "yes", that is, T 出i < T 出均 -ΔT2, it indicates that the outlet pipe temperature of the i-th energy accumulator is significantly low. Then, let DT i = DT i +ΔDT2 to reduce the opening degree of its expansion valve and reduce the refrigerant circulation amount.

[0326] 1.2 Ice formation control process (refer to Figure 6 )

[0327] When the judgment in step S101 is "no", proceed to step S202. Since the water is in the ice formation state at this time, regardless of whether the refrigerant circulation amounts are consistent, the temperatures of all energy accumulators are always at 0°C, and T 水i cannot be used as a criterion for judging whether the refrigerant circulation amounts are balanced. Therefore, use the inlet pipe temperature T of the i-th energy accumulator as the criterion, that is, compare T 进i with the average value T of the inlet pipe temperatures of all operating energy accumulators 进i 进均 进i . If T 进i > T进均 +ΔT3, it indicates that the inlet pipe pressure loss is small, and the expansion valve opening can be reduced. Proceed to step S204 to compare the expansion valve opening EEV of the i-th accumulator i with the lower limit of the expansion valve opening EEV min . If EEV i =EEV min , it means that the expansion valve opening has been reduced to the lower limit and cannot be further reduced. Then, by reducing the target superheat degree of other accumulators, i.e., DT j =DT j -ΔDT3, the expansion valve of other accumulators is increased. If EEV i ≠EEV min , the expansion valve opening is reduced by increasing the superheat degree of the i-th accumulator, i.e., DT i =DT i +ΔDT3. Among them, ΔDT3 is a manually set change value, and its value range is 1°C to 5°C. Optionally, ΔDT3 can be taken as 2°C. Different from the non-icing stage, at this time, the expansion valve is easily touched to the lower limit of the opening. Therefore, it is necessary to compare the expansion valve opening EEV of the i-th accumulator i with the lower limit of the expansion valve opening EEV min .

[0328] When the judgment in step S202 is "no", proceed to step S203. Judge and compare T 进i and T 进均 again. If T 进i <T 进均 -ΔT3, it indicates that the inlet pipe pressure loss is large, and the expansion valve opening needs to be increased to improve the refrigerant circulation volume. Therefore, DT i =DT i -ΔDT3.

[0329] 2. The air-conditioning system is in the cold release mode

[0330] During cold release, first enter step S301 to judge whether the ice has completely melted. If the water temperature does not satisfy T 水i ≥1°C, it means that it is still in the state of ice-water mixture, and the water temperature cannot be used as the criterion for judging whether the refrigerant is balanced. Therefore, enter the un-melted ice control process (incomplete liquefaction state).

[0331] 2.1 Un-melted ice control process (refer to Figure 7 )

[0332] Enter step S302 from step S301. Since in the cold release mode, the refrigerant enters the energy storage device from the outlet pipe of the accumulator, the outlet pipe temperature is used as the criterion. Compare the outlet pipe temperature T 出i of the i-th accumulator and the average value T 出均 of the outlet pipe temperatures of each accumulator. If it satisfies T出i >T 出均 + ΔT4, it indicates that the refrigerant pressure loss entering the i - th energy storage device is significantly small, and the opening degree of the cold - releasing expansion valve 107, i.e., EEV i , can be reduced i = EEV i −ΔEEV4, where ΔEEV4 is the change in the expansion valve opening degree set artificially, and its value range is from 1 step to 50 steps. Optionally, ΔEEV4 can be taken as 20 steps. ΔT4 is a change value set artificially, and its value range is from 1 °C to 5 °C. Optionally, ΔT4 can be taken as 2 °C.

[0333] If the judgment in step S302 is "no", then it enters step S303 to compare T 出i and T 出均 . If T 出i < T 出均 −ΔT4, it indicates that the outlet pipe temperature of the i - th energy storage device is significantly low and the pressure loss is large. Therefore, it is necessary to increase the expansion valve opening degree to increase the refrigerant circulation volume. Enter step S304 to compare the cold - releasing expansion valve opening degree EEV i of the i - th energy storage device with the upper limit of the expansion valve opening degree EEV max . If EEV i = EEV max , it indicates that the expansion valve opening degree has reached the upper limit and cannot be increased anymore. Then, by reducing the cold - releasing expansion valve opening degrees of other energy storage devices, i.e., EEV j = EEV j −ΔEEV4, the refrigerant circulation volume of the i - th energy storage device is increased. If the judgment in step S304 is "no", then increase the cold - releasing expansion valve opening degree EEV i of the i - th energy storage device, i.e., EEV i = EEV i +ΔEEV4.

[0334] 2.2 Ice - melting control process (refer to Figure 8 )

[0335] In step S301, if the water temperature satisfies T 水i ≥1 °C, it enters the ice - melting control process (fully liquefied state), step S402, to judge the relationship between the water temperature T 水i of the i - th energy storage device and the average water temperature T 水均 of all operating energy storage devices. If it satisfies T 水i > T 水均 +ΔT5, it indicates that the cold release of the i - th energy storage device is significantly excessive. Therefore, reduce the cold - releasing expansion valve opening degree EEV i of the i - th energy storage device, i.e., EEV i = EEV i −ΔEEV5. If T 水i>T 水均 + ΔT5, then proceed to step S403, and judge the water temperature T again 水i and the average water temperature T 水均 whether it satisfies T 水i < T 水均 -ΔT5. If this condition is satisfied, further proceed to step S404 to judge whether the expansion valve has been opened to the maximum at this time. If it does not satisfy EEV i =EEV max , then increase the opening of the cold release expansion valve of the i-th accumulator, that is, EEV i =EEV i + ΔEEV5. If it satisfies EEV i =EEV max , it means that the expansion valve has been opened to the maximum. Then, by reducing the opening of the cold release expansion valves of other accumulators, that is, EEV j =EEV j -ΔEEV5, to balance the refrigerant flow rates of each accumulator. Among them, ΔEEV5 is the change amount of the expansion valve opening set artificially, and its value range is from 1 step to 50 steps. Optionally, ΔEEV5 takes the value of 20 steps.

[0336] If the judgment in step S403 is "No", it means that the water temperatures of each accumulator are similar at this time. On this basis, it is necessary to judge whether the outlet pipe temperatures of each accumulator are balanced to prevent the situation that the refrigerant circulation amounts are different again due to the water temperatures of the accumulators, resulting in water temperature differences. Then proceed to step S405 to judge the outlet pipe temperature T 出i of the i-th accumulator and the average outlet pipe temperature T 出均 of each operating accumulator. If it satisfies T 出i > T 出均 + ΔT6, it means that the pressure loss of the refrigerant in the i-th accumulator is significantly small and the refrigerant circulation amount is significantly large, and it is necessary to reduce the opening of its cold release expansion valve EEV i , that is, EEV i =EEV i -ΔEEV6. Among them, ΔEEV6 is the change amount of the expansion valve opening set artificially, and its value range is from 1 step to 50 steps. Optionally, ΔEEV6 takes the value of 20 steps.

[0337] If the judgment in step S405 is "No", then proceed to step S406. If it satisfies T 出i < T 出均 -ΔT6, it means that the pressure loss of the refrigerant in the i-th accumulator is significantly large and the refrigerant circulation amount is significantly small, and it is necessary to increase the opening of the expansion valve. Then proceed to step S407 to judge whether the expansion valve has been opened to the maximum at this time. If the judgment is "No", then increase the opening of the cold release expansion valve EEV i of the i-th accumulator, that is, EEV i =EEV i+ΔEEV6. If the judgment in step S407 is "yes", it indicates that the expansion valve opening has reached the maximum, and it is necessary to balance the refrigerant circulation volume by reducing the opening of the cold release expansion valve EEV of the remaining operating accumulators, that is, EEV j to be equal to EEV j minus ΔEEV6. j

[0338] Based on the descriptions of the above various embodiments, the control method of the multi-connection system provided by the present disclosure monitors the operation of the energy storage multi-connected unit in four stages: the non-icing stage of the cold storage process, the icing stage of the cold storage process, the non-melting ice stage of the cold release process, and the melting ice stage of the cold release process, and respectively formulates a judgment method for distinguishing whether the refrigerant is evenly distributed.

[0339] In the non-icing stage of the cold storage process, first judge whether the water temperature of the accumulator is near the average water temperature. If the water temperatures are significantly different, it is judged that the refrigerant is unbalanced and corresponding adjustments are made. After determining that the water temperature of the accumulator is near the average water temperature, further judgment is made based on whether the outlet pipe temperature is near the average outlet pipe temperature to prevent the problem of significant differences in the water temperature of the accumulator. In the icing stage, no water temperature judgment is made, and the inlet pipe temperature is directly judged. The non-melting ice stage and the melting ice stage of the cold release process are also judged in a similar manner.

[0340] During the cold storage process, the opening of the expansion valve is not directly adjusted to avoid conflicts with the superheat control process built into the air conditioner control program. Instead, the opening of the expansion valve is indirectly changed by changing the target superheat. During the cold release process, there is no accumulator superheat or subcooling control process in the air conditioner control program, so the opening of the expansion valve is directly adjusted to balance the refrigerant circulation.

[0341] Some embodiments of the present disclosure also provide a control device for an air conditioning system, which includes:

[0342] One or more modules that execute the control method of the air conditioning system in any of the above embodiments.

[0343] Some embodiments of the present disclosure also provide a control device for an air conditioning system, including: a memory; and a processor coupled to the memory, the processor being configured to execute the control method of the air conditioning system in any of the above embodiments based on instructions stored in the memory.

[0344] Some embodiments of the present disclosure also provide a computer-readable storage medium, on which computer instructions are stored, and when the computer instructions are executed by a processor, the control method of the air conditioning system in any of the above embodiments is implemented.

[0345] ​Some embodiments of the present disclosure also provide a computer program product, including computer instructions which, when executed by a processor, implement the control method of the air conditioning system in any of the above embodiments.

[0346] Some embodiments of the present disclosure also provide an air conditioning system, including the control device of the above air conditioning system, or the above computer-readable storage medium, or the above computer program product.

[0347] The above air conditioning system includes a multi-split air conditioning system.

[0348] Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present disclosure can take the form of a computer program product implemented on one or more (non-transitory) computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, cloud storage, etc.) containing computer program code. A computer program product should be understood as a software product that mainly realizes its solution through a computer program.

[0349] The present disclosure is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the specified function in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0350] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the specified function in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0351] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are executed on the computer or other programmable apparatus to generate a computer-implemented process, thereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one process Figure 1 one process or more processes and / or blocks Figure 1 or steps for implementing the functions specified in one block or more blocks.

[0352] Based on the above-described embodiments of the present disclosure, in the absence of an express negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.

[0353] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or partial technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A control method for an air conditioning system, the air conditioning system including a plurality of energy accumulators connected in parallel, characterized in that, The control method includes the following steps: In the cold storage mode of the air conditioning system, any one of the multiple energy storage devices is used as the target energy storage device, and it is judged whether the phase change material in the target energy storage device is solidified. Depending on the non-solidified state and the solidified state, the refrigerant circulation amount of the target energy storage device is regulated; or In the cold release mode of the air conditioning system, any one of the multiple energy storage devices is used as the target energy storage device, and it is judged whether the solidified phase change material in the target energy storage device is completely liquefied. Depending on the non-completely liquefied state and the completely liquefied state, the refrigerant circulation amount of the target energy storage device is regulated.

2. The control method of the air conditioning system according to claim 1, characterized in that, When regulating the refrigerant circulation amount of the target energy storage device in the non-solidified state, it includes: regulating the refrigerant circulation amount of the target energy storage device according to the relationship between the heat exchange rate of the target energy storage device and the average heat exchange rate of all energy storage devices.

3. The control method of the air conditioning system according to claim 2, characterized in that, Regulating the refrigerant circulation amount of the target energy storage device according to the relationship between the heat exchange rate of the target energy storage device and the average heat exchange rate of all energy storage devices includes: If the heat exchange rate of the target energy storage device is less than the average heat exchange rate of all energy storage devices, then adjust to increase the refrigerant circulation amount of the target cold storage device; If the heat exchange rate of the target energy storage device is greater than the average heat exchange rate of all energy storage devices, then adjust to decrease the refrigerant circulation amount of the target cold storage device.

4. The control method of the air conditioning system according to claim 3, wherein, The relationship between the heat exchange rate of the target energy storage device and the average heat exchange rate of all energy storage devices is obtained by the following method: Compare the temperature of the phase change material in the target energy storage device with the average value of the temperatures of the phase change materials in all energy storage devices.

5. The control method of the air conditioning system according to claim 4, characterized in that, Comparing the temperature of the phase change material in the target energy storage device with the average value of the temperatures of the phase change materials in all energy storage devices includes: If the temperature of the phase change material in the target energy storage device is greater than the sum of the average value of the temperatures of the phase change materials in all energy storage devices and the temperature change value, then it is judged that the heat exchange rate of the target energy storage device is less than the average heat exchange rate of all energy storage devices; or If the temperature of the phase change material in the target energy storage device is less than the difference between the average value of the temperatures of the phase change materials in all energy storage devices and the temperature change value, then it is judged that the heat exchange rate of the target energy storage device is greater than the average heat exchange rate of all energy storage devices; Wherein, the temperature change value is a set value.

6. The control method of the air conditioning system according to claim 2, characterized in that, Regulating the refrigerant circulation amount of the target energy storage device according to the relationship between the heat exchange rate of the target energy storage device and the average heat exchange rate of all energy storage devices includes: If the heat exchange rate of the target energy storage device is equal to the average heat exchange rate of all energy storage devices, then further regulate the refrigerant circulation amount of the target energy storage device according to the relationship between the outlet pipe temperature of the target energy storage device and the outlet pipe temperatures of all energy storage devices; Wherein, in the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the energy storage device through the first port of the energy storage device, and then flows out from the second port of the energy storage device to the outdoor unit gas pipe. The pipe connected to the second port of the energy storage device is the outlet pipe of the energy storage device.

7. The control method of the air conditioning system according to claim 6, wherein, Adjust the refrigerant circulation volume of the target accumulator according to the relationship between the outlet pipe temperature of the target accumulator and the outlet pipe temperatures of all accumulators, including: If the outlet pipe temperature of the target accumulator is greater than the sum of the average value of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant distribution volume of the target accumulator is less than the average refrigerant distribution volume of all accumulators, and adjust to increase the refrigerant distribution volume of the target accumulator; or If the outlet pipe temperature of the target accumulator is less than the difference between the average value of the outlet pipe temperatures of all accumulators and the temperature change value, the refrigerant distribution volume of the target accumulator is more than the average refrigerant distribution volume of all accumulators, and adjust to decrease the refrigerant distribution volume of the target accumulator; Wherein, the temperature change value is a set value.

8. The control method of the air conditioning system according to claim 3 or 7, characterized in that, In the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows out from the second port of the accumulator to the outdoor unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the outdoor unit liquid pipe; The implementation method of adjusting to increase the refrigerant circulation volume of the target cold storage device includes: When the opening degree of the cold storage regulating valve of the target cold storage device has not reached the maximum opening degree, by reducing the target superheat degree of the target accumulator to increase the opening degree of the cold storage regulating valve of the target cold storage device; or When the opening degree of the cold storage regulating valve of the target cold storage device has reached the maximum opening degree, then by increasing the target superheat degree of the other accumulators except the target accumulator to reduce the opening degree of the cold storage regulating valves of the other accumulators.

9. The control method of the air conditioning system according to claim 3 or 7, characterized in that, In the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows out from the second port of the accumulator to the outdoor unit gas pipe. A cold storage regulating valve is provided on the pipeline connecting the accumulator and the outdoor unit liquid pipe; The implementation method of adjusting to decrease the refrigerant circulation volume of the target cold storage device includes: By increasing the target superheat degree of the target accumulator to reduce the opening degree of the cold storage regulating valve of the target accumulator.

10. The control method of the air conditioning system according to claim 1, characterized in that, In the solidification state, adjust the refrigerant circulation volume of the target accumulator, including: According to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, to adjust the refrigerant circulation volume of the target accumulator.

11. The control method of the air conditioning system according to claim 10, characterized in that, According to the relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators, to adjust the refrigerant circulation volume of the target accumulator, including: If the refrigerant pressure loss of the target accumulator is less than the average refrigerant pressure loss of all accumulators, then adjust to decrease the refrigerant circulation volume of the target cold storage device; If the refrigerant pressure loss of the target accumulator is greater than the average refrigerant pressure loss of all accumulators, then adjust to increase the refrigerant circulation volume of the target cold storage device.

12. The control method of the air conditioning system according to claim 11, characterized in that, The relationship between the refrigerant pressure loss of the target accumulator and the average refrigerant pressure loss of all accumulators is obtained by the following method: Compare the inlet pipe temperature in the target accumulator with the average value of the inlet pipe temperatures in all accumulators; In the cold storage mode, the refrigerant transported by the external machine's liquid pipe is sent to the energy accumulator through the first port of the energy accumulator, and then flows from the second port of the energy accumulator to the external machine's gas pipe. The pipe connected to the first port of the energy accumulator is the inlet pipe of the energy accumulator.

13. The control method of the air conditioning system according to claim 12, characterized in that, Comparing the inlet pipe temperature in the target energy accumulator with the average value of the inlet pipe temperatures in all the energy accumulators includes: If the inlet pipe temperature in the target energy accumulator is greater than the sum of the average value of the inlet pipe temperatures in all the energy accumulators and the temperature change value, it is determined that the refrigerant pressure loss in the target energy accumulator is less than the average refrigerant pressure loss in all the energy accumulators; or If the inlet pipe temperature in the target energy accumulator is less than the difference between the average value of the inlet pipe temperatures in all the energy accumulators and the temperature change value, it is determined that the refrigerant pressure loss in the target energy accumulator is more than the average refrigerant pressure loss in all the energy accumulators; Wherein, the temperature change value is a set value.

14. The control method of the air conditioning system according to claim 11, wherein In the cold storage mode, the refrigerant transported by the external machine's liquid pipe is sent to the energy accumulator through the first port of the energy accumulator, and then flows from the second port of the energy accumulator to the external machine's gas pipe. A cold storage regulating valve is provided on the pipe connecting the energy accumulator and the external machine's liquid pipe; The implementation method of adjusting and increasing the refrigerant circulation volume of the target cold storage device includes: By reducing the target superheat degree of the target energy accumulator to increase the opening degree of the cold storage regulating valve of the target energy accumulator.

15. The control method of the air conditioning system according to claim 11, characterized in that, In the cold storage mode, the refrigerant transported by the external machine's liquid pipe is sent to the energy accumulator through the first port of the energy accumulator, and then flows from the second port of the energy accumulator to the external machine's gas pipe. A cold storage regulating valve is provided on the pipe connecting the energy accumulator and the external machine's liquid pipe: The implementation method of adjusting and reducing the refrigerant circulation volume of the target cold storage device includes: When the opening degree of the cold storage regulating valve of the target cold storage device has not reached the minimum opening degree, by increasing the target superheat degree of the target energy accumulator to reduce the opening degree of the cold storage regulating valve of the target cold storage device; or When the opening degree of the cold storage regulating valve of the target cold storage device has reached the minimum opening degree, by reducing the target superheat degree of the energy accumulators other than the target energy accumulator to increase the opening degree of the cold storage regulating valves of the other energy accumulators.

16. The control method of the air conditioning system according to claim 1, characterized in that, In the incompletely liquefied state, regulating the refrigerant circulation volume of the target energy accumulator includes: regulating the refrigerant circulation volume of the target energy accumulator according to the relationship between the refrigerant pressure loss of the target energy accumulator and the average refrigerant pressure loss of all the energy accumulators.

17. The control method of the air conditioning system according to claim 16, characterized in that, Regulating the refrigerant circulation volume of the target energy accumulator according to the relationship between the refrigerant pressure loss of the target energy accumulator and the average refrigerant pressure loss of all the energy accumulators includes: If the refrigerant pressure loss of the target energy accumulator is less than the average refrigerant pressure loss of all the energy accumulators, then adjust and reduce the refrigerant circulation volume of the target cold storage device; If the refrigerant pressure loss of the target energy accumulator is greater than the refrigerant pressure loss of all the energy accumulators, then adjust and increase the refrigerant circulation volume of the target cold storage device.

18. The control method of the air conditioning system according to claim 17, characterized in that, The relationship between the refrigerant pressure loss of the target energy accumulator and the average refrigerant pressure loss of all the energy accumulators is obtained by the following method: Compare the outlet pipe temperature in the target accumulator with the average value of the outlet pipe temperatures in all the accumulators; In the cooling mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. Among them, the pipe connected to the second port of the accumulator is the outlet pipe of the accumulator.

19. The control method of the air conditioning system according to claim 18, characterized in that, Comparing the outlet pipe temperature in the target accumulator with the average value of the outlet pipe temperatures in all the accumulators includes: If the outlet pipe temperature in the target accumulator is greater than the sum of the average value of the outlet pipe temperatures in all the accumulators and the temperature change value, then the refrigerant pressure loss in the target accumulator is less than the refrigerant pressure loss in all the accumulators; or If the outlet pipe temperature in the target accumulator is less than the difference between the average value of the outlet pipe temperatures in all the accumulators and the temperature change value, then the refrigerant pressure loss in the target accumulator is greater than the refrigerant pressure loss in all the accumulators; Among them, the temperature change value is a set value.

20. The control method of the air conditioning system according to claim 17, characterized in that, In the cooling mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cooling regulating valve is provided on the pipe connecting the accumulator and the indoor unit liquid pipe; The implementation method for adjusting and increasing the refrigerant circulation volume of the target cold storage accumulator includes: When the opening degree of the cooling regulating valve of the target cold storage accumulator has not reached the maximum opening degree, adjust and increase the opening degree of the cooling regulating valve of the target cold storage accumulator; Or When the opening degree of the cooling regulating valve of the target cold storage accumulator has reached the maximum opening degree, then adjust and decrease the opening degree of the cooling regulating valves of the other accumulators except the target accumulator.

21. The control method of the air conditioning system according to claim 17, characterized in that, In the cooling mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cooling regulating valve is provided on the pipe connecting the accumulator and the indoor unit liquid pipe; The implementation method for adjusting and decreasing the refrigerant circulation volume of the target cold storage accumulator includes: Decrease the opening degree of the cooling regulating valve of the target accumulator.

22. The control method of the air conditioning system according to claim 1, wherein, In the fully liquefied state, regulating the refrigerant circulation volume of the target accumulator includes: According to the relationship between the cold quantity release amount of the target accumulator and the average cold quantity release amount of all the accumulators, to regulate the refrigerant circulation volume of the target accumulator.

23. The control method of the air-conditioning system according to claim 22, wherein According to the relationship between the cold quantity release amount of the target accumulator and the average cold quantity release amount of all the accumulators, to regulate the refrigerant circulation volume of the target accumulator includes: If the cold quantity release amount of the target accumulator is greater than the average cold quantity release amount of all the accumulators, then adjust and decrease the refrigerant circulation volume of the target cold storage accumulator; If the cold quantity release amount of the target accumulator is less than the average cold quantity release amount of all the accumulators, then adjust and increase the refrigerant circulation volume of the target cold storage accumulator.

24. The control method of the air conditioning system according to claim 23, characterized in that, The relationship between the cold quantity release amount of the target accumulator and the average cold quantity release amount of all the accumulators is obtained by the following method: Compare the temperature of the phase change material in the target energy storage device with the average temperature of the phase change materials in all the energy storage devices.

25. The control method of the air conditioning system according to claim 24, wherein Comparing the temperature of the phase change material in the target energy storage device with the average temperature of the phase change materials in all the energy storage devices includes: If the temperature of the phase change material in the target energy storage device is greater than the sum of the average temperature of the phase change materials in all the energy storage devices and the temperature change value, it is determined that the cooling capacity released by the target energy storage device is greater than the average cooling capacity released by all the energy storage devices; or If the temperature of the phase change material in the target energy storage device is less than the difference between the average temperature of the phase change materials in all the energy storage devices and the temperature change value, the cooling capacity released by the target energy storage device is less than the average cooling capacity released by all the energy storage devices; wherein, the temperature change value is a set value.

26. The control method of the air conditioning system according to claim 22, wherein, According to the relationship between the cooling capacity released by the target energy storage device and the average cooling capacity released by all the energy storage devices, to regulate the refrigerant circulation amount of the target energy storage device, including: If the cooling capacity released by the target energy storage device is equal to the average cooling capacity released by all the energy storage devices, further regulate the refrigerant circulation amount of the target energy storage device according to the relationship between the refrigerant pressure loss of the target energy storage device and the average refrigerant pressure loss of all the energy storage devices.

27. The control method of the air conditioning system according to claim 26, characterized in that, According to the relationship between the refrigerant pressure loss of the target energy storage device and the average refrigerant pressure loss of all the energy storage devices, to regulate the refrigerant circulation amount of the target energy storage device, including: If the refrigerant pressure loss of the target energy storage device is less than the average refrigerant pressure loss of all the energy storage devices, adjust and reduce the refrigerant circulation amount of the target cold storage device; If the refrigerant pressure loss of the target energy storage device is more than the average refrigerant pressure loss of all the energy storage devices, adjust and increase the refrigerant circulation amount of the target cold storage device.

28. The control method of the air conditioning system according to claim 27, characterized in that, The relationship between the refrigerant pressure loss of the target energy storage device and the average refrigerant pressure loss of all the energy storage devices is obtained by the following method: Compare the outlet pipe temperature of the target energy storage device with the average of the outlet pipe temperatures of all the energy storage devices; Wherein, in the cooling mode, the refrigerant transported by the outdoor unit liquid pipe enters the energy storage device through the second port of the energy storage device, and then flows from the first port of the energy storage device to the indoor unit liquid pipe. Among them, the pipeline connected to the second port of the energy storage device is the outlet pipe of the energy storage device.

29. The control method of the air conditioning system according to claim 28, wherein Comparing the outlet pipe temperature of the target energy storage device with the average of the outlet pipe temperatures of all the energy storage devices includes: If the outlet pipe temperature of the target energy storage device is greater than the sum of the average of the outlet pipe temperatures of all the energy storage devices and the temperature change value, the refrigerant pressure loss of the target energy storage device is less than the average refrigerant pressure loss of all the energy storage devices; or If the outlet pipe temperature of the target energy storage device is less than the difference between the average of the outlet pipe temperatures of all the energy storage devices and the temperature change value, the refrigerant pressure loss of the target energy storage device is more than the average refrigerant pressure loss of all the energy storage devices; wherein, the temperature change value is a set value.

30. The control method of the air conditioning system according to claim 23 or 27, characterized in that, In the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe; The implementation methods for adjusting and increasing the refrigerant circulation volume of the target accumulator include: If the opening degree of the cold release regulating valve of the target accumulator has not reached the maximum opening degree, then adjust and increase the opening degree of the cold release regulating valve of the target accumulator; Or If the opening degree of the cold release regulating valve of the target accumulator has reached the maximum opening degree, then adjust and decrease the opening degree of the cold release regulating valves of the other accumulators except the target accumulator.

31. The control method of the air conditioning system according to claim 23 or 27, characterized in that, In the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. A cold release regulating valve is provided on the pipeline connecting the accumulator and the indoor unit liquid pipe: The implementation methods for adjusting and decreasing the refrigerant circulation volume of the target accumulator include: Adjust and decrease the opening degree of the cold release regulating valve of the target accumulator.

32. The control method of the air conditioning system according to claim 1, characterized in that, In the cold storage mode, the refrigerant transported by the outdoor unit liquid pipe is sent to the accumulator through the first port of the accumulator, and then flows from the second port of the accumulator to the outdoor unit gas pipe. The pipeline connected to the first port of the accumulator is the inlet pipe of the accumulator, and the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator. According to at least one of the following three comparison results, the refrigerant circulation volume of the target accumulator is regulated: The comparison between the temperature of the phase change material in the target accumulator and the average value of the temperatures of the phase change materials in all accumulators; The comparison between the outlet pipe temperature of the target accumulator and the average value of the outlet pipe temperatures of all accumulators; and The comparison between the inlet pipe temperature of the target accumulator and the average value of the inlet pipe temperatures of all accumulators.

33. The control method of the air conditioning system according to claim 1, wherein In the cold release mode, the refrigerant transported by the outdoor unit liquid pipe enters the accumulator through the second port of the accumulator, and then flows from the first port of the accumulator to the indoor unit liquid pipe. Among them, the pipeline connected to the second port of the accumulator is the outlet pipe of the accumulator. According to at least one of the following two comparison results, the refrigerant circulation volume of the target accumulator is regulated: The comparison between the temperature of the phase change material in the target accumulator and the average value of the temperatures of the phase change materials in all accumulators; and The comparison between the outlet pipe temperature of the target accumulator and the average value of the outlet pipe temperatures of all accumulators.

34. The control method of the air conditioning system according to claim 1, characterized in that Monitor the refrigerant circulation volume of each accumulator among the multiple accumulators as the target accumulator once. If the refrigerant circulation volumes of all accumulators meet the requirements, then after an interval of the first preset time, monitor the refrigerant circulation volume of each accumulator among the multiple accumulators as the target accumulator again. If the refrigerant circulation volume of any one of the multiple accumulators does not meet the requirements, then adjust the refrigerant circulation volume of this accumulator. After the adjustment is completed and the second preset time is reached, monitor the refrigerant circulation volume of each accumulator among the multiple accumulators as the target accumulator again; wherein, the second preset time is greater than the first preset time.

35. A control device for an air conditioning system, characterized in that Comprising: One or more modules for executing the air-conditioning system control method according to any one of claims 1 to 34.

36. A control device for an air conditioning system, comprising: A memory; And a processor coupled to the memory, wherein the processor is configured to execute the air-conditioning system control method according to any one of claims 1 to 34 based on instructions stored in the memory.

37. A computer-readable storage medium having computer instructions stored thereon, characterized in that, When the computer instructions are executed by the processor, the air-conditioning system control method according to any one of claims 1 to 34 is implemented.

38. A computer program product comprising computer instructions, characterized in that, When the computer instructions are executed by the processor, the air-conditioning system control method according to any one of claims 1 to 34 is implemented.

39. An air conditioning system, characterized in that, Comprising the air-conditioning system control device according to claim 35 or 36, or the computer-readable storage medium according to claim 37, or the computer program product according to claim 38.

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