A cooling energy-saving control method and system for a magnetic suspension phase change air conditioning system

Abstract

The invention discloses a cooling energy-saving control method and system for a magnetic suspension phase change air-conditioning system, and relates to the technical field of air-conditioning control, comprising: firstly, performing a cooling test on the air-conditioning system to obtain a temperature-pressure balance curve and an imbalance temperature and an imbalance time point; obtaining an efficiency amplitude curve; obtaining an imbalance heat dissipation temperature and a variable amplitude heat dissipation temperature; and controlling the rotation speed of an exhaust fan in a condenser based on the imbalance heat dissipation temperature and the variable amplitude heat dissipation temperature. The invention is used to solve the problem in the prior art that, during the cooling process of the magnetic suspension phase change air-conditioning, if the pressure in the compressor is too large, the cooling efficiency of the magnetic suspension phase change air-conditioning will be reduced and the heat dissipation efficiency of waste heat cannot be effectively improved, thereby causing the magnetic suspension phase change air-conditioning to do more ineffective work and reduce energy utilization efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning control, and in particular to a cooling energy-saving control method and system for a magnetic suspension phase change air conditioning system. Background Art

[0002] The magnetic levitation phase change air conditioning system is an air conditioning system that uses magnetic levitation technology. Its core is to use magnetic levitation technology to achieve efficient operation of the compressor. Magnetic levitation technology uses magnetic bearings and positioning sensors to suspend the moving parts of the compressor on the magnetic lining to achieve frictionless movement, thereby greatly reducing energy loss and improving the efficiency and stability of the unit; during the operation of the magnetic levitation air conditioning system, it is difficult to recover and utilize waste heat, which to a certain extent limits its energy utilization efficiency.

[0003] Existing methods for energy-saving control of magnetic levitation phase-changing air-conditioning systems are usually improvements in automatic control of magnetic levitation phase-changing air-conditioning systems. By ensuring that the magnetic levitation air-conditioning system operates according to control parameters, when the ambient temperature is consistent with the target ambient temperature, the working frequency of the magnetic levitation compressor is adjusted to make the magnetic levitation air-conditioning system energy-saving, thereby reducing the power consumption of the magnetic levitation phase-changing air-conditioning system. Although this improved method can make the magnetic levitation air-conditioning system energy-saving, it can only regulate the magnetic levitation phase-changing air-conditioning system when the ambient temperature is consistent with the target ambient temperature. If the pressure in the compressor is too high during the cooling process of the magnetic levitation phase-changing air-conditioning system, the cooling efficiency of the magnetic levitation phase-changing air-conditioning system will be reduced and the heat dissipation efficiency of the waste heat will not be effectively improved, thereby reducing the recovery and utilization rate of the waste heat, resulting in a large amount of ineffective work done by the magnetic levitation phase-changing air-conditioning system and a reduced energy utilization efficiency. For example, in the patent application publication number CN118328480A In the patent application, a magnetic levitation air-conditioning control method and system are disclosed. The scheme realizes automatic control of the magnetic levitation air-conditioning so that the magnetic levitation air-conditioning can adapt to scenarios with various functional requirements, and when the target ambient temperature is reached, the magnetic levitation air-conditioning can be operated in an energy-saving manner, thereby reducing the power consumption of the magnetic levitation air-conditioning. Other improvements in energy-saving control for magnetic levitation disguised air-conditioning systems are usually improvements in improving the service life of the air-conditioning system and reducing the failure rate. They still cannot solve the problem that if the pressure in the compressor is too high during the cooling process of the magnetic levitation disguised air-conditioning, the cooling efficiency of the magnetic levitation disguised air-conditioning will be reduced and the heat dissipation efficiency of the waste heat will not be effectively improved, thereby reducing the recovery and utilization rate of the waste heat, resulting in a large amount of ineffective work and reduced energy utilization efficiency of the magnetic levitation disguised air-conditioning. In view of this, it is necessary to improve the existing energy-saving control method for magnetic levitation disguised air-conditioning systems. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the prior art to at least a certain extent. It proposes a cooling energy-saving control method and system for a magnetic levitation phase change air-conditioning system to solve the problem in the existing energy-saving control method for a magnetic levitation phase change air-conditioning system that if the pressure in the compressor is too large during the cooling process of the magnetic levitation phase change air-conditioning, the cooling efficiency of the magnetic levitation phase change air-conditioning will be reduced and the heat dissipation efficiency of the waste heat will not be effectively improved, thereby reducing the recovery and utilization rate of the waste heat, resulting in a large amount of ineffective work and reduced energy utilization efficiency of the magnetic levitation phase change air-conditioning.

[0005] To achieve the above objectives, in a first aspect, the present application provides a cooling energy-saving control method for a magnetic suspension phase change air conditioning system, comprising the following steps:

[0006] Use a temperature sensor and a pressure sensor to perform a cooling test on the air conditioning system, and obtain a temperature-pressure balance curve of the air conditioning system based on the results of the cooling test, and analyze the temperature-pressure balance curve to obtain an imbalance temperature and an imbalance time point based on the analysis results;

[0007] Based on big data, the cooling efficiency of the air-conditioning system in the cooling test process under ideal conditions and the cooling efficiency of the air-conditioning system in the cooling test process in actual tests are obtained, and the efficiency amplitude curve is obtained; based on the temperature-pressure balance curve and the efficiency amplitude curve, the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature are obtained;

[0008] When the air conditioning system is actually used, the speed of the exhaust fan in the condenser is controlled based on the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature.

[0009] Furthermore, the cooling test of the air conditioning system using the temperature sensor and the pressure sensor includes:

[0010] Place the magnetic levitation disguised phase air conditioner in an empty room, and place a temperature sensor in the empty room, and record the detection result of the temperature sensor as the indoor temperature; record the indoor temperature when the magnetic levitation disguised phase air conditioner is not started as the initial temperature; place a pressure sensor in the compressor of the magnetic levitation disguised phase air conditioner, and record the detection result of the pressure sensor as the compressor pressure value; and perform a cooling test on the air-conditioning system of the magnetic levitation disguised phase air conditioner.

[0011] Further, the cooling test is:

[0012] The lowest temperature that the air conditioning system can cool is recorded as the baseline temperature; the magnetic levitation phase-changing air conditioner, temperature sensor and pressure sensor are started to adjust the cooling temperature to the baseline temperature; a plane rectangular coordinate system is established, recorded as the temperature-pressure analysis coordinate system, where the unit of the X-axis of the temperature-pressure analysis coordinate system is time, and the value represented by the Y-axis is Among them, f is the compressor pressure value, t0 is the initial temperature, and t1 is the indoor temperature; the value of the initial temperature minus the bottom line temperature is recorded as the maximum temperature difference, and the compressor pressure value when the magnetic levitation phase-changing air conditioner is started is divided by the value of the maximum temperature difference is recorded as the ideal temperature and pressure value; the straight line where Y = ideal temperature and pressure value in the temperature and pressure analysis coordinate system is recorded as the ideal temperature and pressure line.

[0013] Furthermore, the cooling test also includes:

[0014] When the magnetic suspension phase-changing air conditioner is started and the indoor temperature is lower than the initial temperature, a corresponding curve is drawn in the temperature-pressure analysis coordinate system based on the detected compressor pressure value and the indoor temperature, and the obtained curve is recorded as the temperature-pressure balance curve; a straight line parallel to the y-axis is used to divide the temperature-pressure balance curve into k parts, and each part is recorded from left to right as temperature-pressure sub-curve WZ1 to temperature-pressure sub-curve WZ k ;

[0015] For any temperature-barometric subcurve WZ k1 , get the temperature-barometric subcurve WZ k1 The slope of all points in the temperature-barometric valley is the slope with the smallest absolute value; the temperature-barometric valley curve WZ k1 The coordinates of the leftmost point and the rightmost point are recorded as (x1, y1) and (x2, y2) respectively; the temperature-pressure subcurve WZ is obtained using the subcurve algorithm k1 The corresponding curve reduction, sub-curve algorithm is: Wherein, G is the curve drop value, g1 is the temperature-pressure valley slope; obtain the curve drop values ​​corresponding to all temperature-pressure sub-curves WZ, and record the temperature-pressure sub-curve WZ corresponding to the smallest curve drop value as the imbalance curve, wherein, when there are multiple temperature-pressure sub-curves WZ with the smallest curve drop value, the leftmost temperature-pressure sub-curve WZ among the temperature-pressure sub-curves WZ with the smallest curve drop value is recorded as the imbalance curve;

[0016] The midpoint of the imbalance curve is recorded as the imbalance analysis point, the indoor temperature in the ordinate of the imbalance analysis point is recorded as the imbalance temperature, and the abscissa of the imbalance analysis point is marked as the imbalance time point A.

[0017] Furthermore, based on big data, the cooling efficiency of the air conditioning system during the cooling test under ideal conditions and the cooling efficiency of the air conditioning system during the cooling test in actual tests are obtained, and the efficiency range curve is obtained, including:

[0018] A plane rectangular coordinate system is established, which is recorded as a temperature reduction analysis coordinate system, wherein the abscissa of the temperature reduction analysis coordinate system is time, and the ordinate is temperature;

[0019] Based on big data, the air-conditioning system of the magnetic levitation phase change air conditioner in the ideal state is obtained in the environment where the cooling test is carried out. After the magnetic levitation phase change air conditioner is started, the indoor temperature change data in the process of the indoor temperature dropping from the initial temperature to the bottom line temperature is obtained, and the corresponding curve is drawn in the cooling analysis coordinate system, which is recorded as the ideal cooling curve, wherein the ideal state is the state in which the air-conditioning system of the magnetic levitation phase change air conditioner is not affected by the pressure change and temperature change inside the air conditioner;

[0020] The horizontal coordinate of the rightmost point of the ideal cooling curve is marked as the cooling end point, the point with the imbalance temperature as the vertical coordinate in the ideal cooling curve is marked as the ideal imbalance point, and the horizontal coordinate of the ideal imbalance point is marked as the imbalance time point B.

[0021] Furthermore, based on big data, the cooling efficiency of the air conditioning system during the cooling test under ideal conditions and the cooling efficiency of the air conditioning system during the cooling test in actual tests are obtained, and the efficiency range curve is obtained, which also includes:

[0022] Based on the detection data of the temperature sensor after the magnetic suspension air conditioner is started in the cooling test, a curve is drawn in the cooling analysis coordinate system, which is recorded as the test cooling curve, and the curve whose horizontal coordinate is greater than the cooling end point in the test cooling curve is removed;

[0023] For any point (x3, y3) in the test cooling curve, mark the vertical coordinate of the point with the horizontal coordinate x3 in the ideal cooling curve as y4, and mark the point (x3, ) is recorded as the amplitude point, and |y3-y4| is recorded as the amplitude value; the amplitude points of all points in the cooling test curve are obtained, and the curve fitted by all the amplitude points is recorded as the efficiency amplitude curve; the horizontal coordinate of the amplitude point corresponding to the maximum amplitude value is marked as the maximum amplitude change time.

[0024] Further, obtaining the unbalanced heat dissipation temperature and the variable-amplitude heat dissipation temperature based on the temperature-pressure balance curve and the efficiency amplitude curve includes:

[0025] The point whose horizontal coordinate in the efficiency amplitude curve is the maximum amplitude time is recorded as the maximum amplitude point; the point whose horizontal coordinate in the efficiency amplitude curve is the imbalance time point A and the imbalance time point B is recorded as the imbalance point A and the imbalance point B;

[0026] The closed curve formed by the unbalanced time point A and the maximum amplitude point in the efficiency amplitude curve is recorded as the primary amplitude curve; the closed curve formed by the unbalanced time point B and the maximum amplitude point in the efficiency amplitude curve is recorded as the secondary amplitude curve; the closed curve formed by the unbalanced time point A and the unbalanced time point B is recorded as the unbalanced amplitude curve; the point with the smallest absolute value of the slope in the primary amplitude curve is recorded as the primary amplitude point; the point with the smallest absolute value of the slope in the secondary amplitude curve is recorded as the secondary amplitude point; the point with the smallest absolute value of the slope in the unbalanced amplitude curve is recorded as the unbalanced amplitude point;

[0027] The vertical coordinates of the first-level amplitude change point and the second-level amplitude change point are marked as the amplitude change heat dissipation temperature; the vertical coordinates of the unbalanced amplitude change point are marked as the unbalanced heat dissipation temperature.

[0028] Further, controlling the speed of the exhaust fan in the condenser based on the unbalanced heat dissipation temperature and the variable heat dissipation temperature includes:

[0029] When the air conditioning system of the magnetic levitation phase change air conditioner is actually used, the temperature of the room where the magnetic levitation phase change air conditioner is located is obtained in real time. When the indoor temperature is equal to the unbalanced heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value.

[0030] Further, controlling the speed of the exhaust fan in the condenser based on the unbalanced heat dissipation temperature and the variable heat dissipation temperature also includes:

[0031] When the air-conditioning system of the magnetic levitation phase change air conditioner is actually used, the temperature of the room where the magnetic levitation phase change air conditioner is located is obtained in real time. When the indoor temperature is equal to any variable amplitude heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value and the power of the compressor is adjusted to the rated power.

[0032] In a second aspect, the present application also provides a cooling energy-saving control system for a magnetic suspension phase change air conditioning system, including an imbalance analysis module, a temperature drop analysis module and a system adjustment module;

[0033] The imbalance analysis module is used to perform a cooling test on the air conditioning system using a temperature sensor and a pressure sensor, and obtain a temperature-pressure balance curve of the air conditioning system based on the result of the cooling test, and analyze the temperature-pressure balance curve, and obtain an imbalance temperature and an imbalance time point based on the analysis result;

[0034] The cooling analysis module is used to obtain the cooling efficiency of the air conditioning system during the cooling test under ideal conditions and the cooling efficiency of the air conditioning system during the cooling test in actual tests based on big data, and obtain the efficiency amplitude curve; obtain the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature based on the temperature-pressure balance curve and the efficiency amplitude curve;

[0035] The system adjustment module is used to control the speed of the exhaust fan in the condenser based on the unbalanced heat dissipation temperature and the variable heat dissipation temperature when the air conditioning system is actually used.

[0036] Beneficial effects of the present invention: The present application first performs a cooling test on the air-conditioning system, and obtains the temperature-pressure balance curve of the air-conditioning system based on the result of the cooling test, and analyzes the temperature-pressure balance curve, and obtains the imbalance temperature and imbalance time point based on the analysis result. The advantage of this is that by performing a cooling test and obtaining the temperature-pressure balance curve, the relationship between the indoor temperature change and the pressure value in the compressor during the refrigeration period of the magnetic levitation phase-changing air-conditioning system can be obtained, thereby obtaining the time point when the pressure value in the compressor is the largest and the cooling efficiency is the lowest, that is, the imbalance time point, and the imbalance temperature at this time can be obtained, which is helpful to obtain the control time point when the magnetic levitation phase-changing air-conditioning system is subsequently controlled, thereby improving the control efficiency and ensuring that the control of the magnetic levitation phase-changing air-conditioning is effectively regulated;

[0037] The present application also obtains the cooling efficiency of the air-conditioning system during the cooling test under ideal conditions and the cooling efficiency of the air-conditioning system during the cooling test in actual tests based on big data, and obtains the efficiency amplitude curve; obtains the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature based on the temperature-pressure balance curve and the efficiency amplitude curve; finally, when the air-conditioning system is actually used, the speed of the exhaust fan in the condenser is controlled based on the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature. The advantage of this is that by obtaining the efficiency amplitude curve and obtaining the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature, the temperature of the environment in which the air-conditioning system is located can be obtained when the pressure in the compressor is too high, the cooling efficiency of the magnetic levitation phase-changing air conditioner is reduced, and the heat dissipation efficiency of the waste heat cannot be effectively improved, thereby enabling effective energy-saving control of the air-conditioning system, increasing the exhaust rate of the condenser and reducing the pressure value in the compressor, thereby preventing the problem of more ineffective work and reduced energy utilization efficiency of the magnetic levitation phase-changing air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a functional block diagram of the system of the present invention;

[0039] Figure 2 is a flow chart of the steps of the method of the present invention;

[0040] Figure 3 It is a schematic diagram of the temperature-pressure equilibrium curve of the present invention;

[0041] Figure 4 is a schematic diagram of the efficiency amplitude curve of the present invention;

[0042] Figure 5 It is a schematic structural diagram of the electronic device of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1, please refer to Figure 1 As shown, the present application provides a cooling energy-saving control system for a magnetic suspension phase change air conditioning system, including an imbalance analysis module, a temperature drop analysis module and a system adjustment module;

[0045] The imbalance analysis module is used to perform a cooling test on the air conditioning system using a temperature sensor and a pressure sensor, and obtain a temperature-pressure balance curve of the air conditioning system based on the result of the cooling test, and analyze the temperature-pressure balance curve, and obtain an imbalance temperature and an imbalance time point based on the analysis result; the imbalance analysis module includes an imbalance analysis unit, and the imbalance analysis unit is configured with an imbalance analysis strategy;

[0046] The imbalance analysis strategy includes: placing the magnetic levitation phase-changing air conditioner in an empty room, placing a temperature sensor in the empty room, and recording the detection result of the temperature sensor as the indoor temperature; recording the indoor temperature when the magnetic levitation phase-changing air conditioner is not started as the initial temperature; placing a pressure sensor in the compressor of the magnetic levitation phase-changing air conditioner, and recording the detection result of the pressure sensor as the compressor pressure value; in the specific implementation process, in this embodiment, because this embodiment controls the condenser, the pressure sensor is used to detect the pressure value of the high pressure in the air-conditioning system, that is, the compressor pressure value is the pressure value of the high pressure area;

[0047] The air conditioning system of the magnetic levitation phase-changing air conditioner is subjected to a cooling test; in the specific implementation process, the magnetic levitation phase-changing air conditioning system has the problem of being unable to effectively recover waste heat during refrigeration, which will cause the pressure value in the air conditioning system to be too large, thereby affecting the working efficiency of the compressor. Therefore, in order to ensure that the waste heat can be fully recovered, this embodiment obtains the time point and temperature when the cooling efficiency of the magnetic levitation phase-changing air conditioning system is the lowest and the compressor pressure value is the largest during the cooling period through a cooling test, and then accurately regulates the air conditioning system. The cooling test is:

[0048] The lowest temperature that the air conditioning system can cool is recorded as the baseline temperature; the magnetic levitation phase-changing air conditioner, temperature sensor and pressure sensor are started to adjust the cooling temperature to the baseline temperature; a plane rectangular coordinate system is established, recorded as the temperature-pressure analysis coordinate system, where the unit of the X-axis of the temperature-pressure analysis coordinate system is time, and the value represented by the Y-axis is Wherein, f is the compressor pressure value, t0 is the initial temperature, and t1 is the indoor temperature; the value of the initial temperature minus the bottom line temperature is recorded as the maximum temperature difference, and the value of the compressor pressure value when the magnetic levitation phase-changing air conditioner is started divided by the maximum temperature difference is recorded as the ideal temperature and pressure value; the straight line Y=ideal temperature and pressure value in the temperature and pressure analysis coordinate system is recorded as the ideal temperature and pressure line; in the specific implementation process, for example, in a data processing, the bottom line temperature is 16°C, the initial temperature is 25°C, the maximum temperature difference is 9°C, and the compressor pressure value when the magnetic levitation phase-changing air conditioner is started is 1.3MPa, then the ideal temperature and pressure value can be calculated to be about 0.14;

[0049] When the magnetic suspension phase-changing air conditioner is started and the indoor temperature is lower than the initial temperature, a corresponding curve is drawn in the temperature-pressure analysis coordinate system based on the detected compressor pressure value and the indoor temperature, and the obtained curve is recorded as the temperature-pressure balance curve; a straight line parallel to the y-axis is used to divide the temperature-pressure balance curve into k parts, and each part is recorded from left to right as temperature-pressure sub-curve WZ1 to temperature-pressure sub-curve WZ k In the specific implementation process, based on the data obtained in this embodiment, the temperature-pressure balance curve obtained can be found in Figure 3 As shown, curve QQ1 is a temperature-pressure balance curve; in actual implementation, the value of k can be set to the minimum value according to actual analysis to ensure that the obtained value is more accurate. In this implementation, the value of k is set to 5, and curve WZ1 is a temperature-pressure sub-curve WZ in curve QQ1. Through analysis, it is found that the ordinate YY1 of the left point in curve WZ1 is 0.28, and the abscissa XX1 is 5; the ordinate YY2 of the left point in curve WZ1 is 0.2, and the abscissa XX2 is 10, and the value of point YY3 is 0.14; through analysis, it is found that the slope with the smallest absolute value of all points in curve WZ1 is 0.018; then, by using the sub-curve algorithm, it can be calculated that the curve drop value of curve WZ1 is 0.02025; by obtaining the curve drop value, the point with the lowest temperature drop rate in the cooling process of the magnetic suspension phase-changing air-conditioning system can be obtained, which is helpful for the subsequent precise control of the air-conditioning system;

[0050] For any temperature-barometric subcurve WZ k1 , get the temperature-barometric subcurve WZ k1 The slope of all points in the temperature-barometric valley is the slope with the smallest absolute value; the temperature-barometric valley curve WZ k1 The coordinates of the leftmost point and the rightmost point are recorded as (x1, y1) and (x2, y2) respectively; the temperature-pressure subcurve WZ is obtained using the subcurve algorithm k1 The corresponding curve reduction, sub-curve algorithm is: Wherein, G is the curve drop value, g1 is the temperature-pressure valley slope; obtain the curve drop values ​​corresponding to all temperature-pressure sub-curves WZ, and record the temperature-pressure sub-curve WZ corresponding to the smallest curve drop value as the imbalance curve, wherein, when there are multiple temperature-pressure sub-curves WZ with the smallest curve drop value, the leftmost temperature-pressure sub-curve WZ among the temperature-pressure sub-curves WZ with the smallest curve drop value is recorded as the imbalance curve;

[0051] In the specific implementation process, the smaller the curve drop value is, the lower the temperature reduction rate is in the temperature-pressure sub-curve WZ corresponding to the curve drop value. Therefore, by recording the temperature-pressure sub-curve WZ at this time as an imbalance curve, and obtaining the imbalance temperature and the imbalance time point A, the timing of control can be determined when the air-conditioning system is used for cooling in the future; through the temperature-pressure balance curve in this embodiment, the imbalance curve is obtained as curve WZ1, and the midpoint of the curve WZ is recorded as the imbalance analysis point, and the coordinates of the imbalance analysis point are (7.5, 0.24); by analyzing the imbalance analysis point, it is obtained that the imbalance temperature is 20°C and the imbalance time A is 7.5min;

[0052] The midpoint of the imbalance curve is recorded as the imbalance analysis point, the indoor temperature in the ordinate of the imbalance analysis point is recorded as the imbalance temperature, and the abscissa of the imbalance analysis point is marked as the imbalance time point A.

[0053] The cooling analysis module is used to obtain the cooling efficiency of the air conditioning system during the cooling test under ideal conditions and the cooling efficiency of the air conditioning system during the cooling test in actual tests based on big data, and obtain the efficiency amplitude curve; obtain the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature based on the temperature-pressure balance curve and the efficiency amplitude curve;

[0054] The cooling analysis module includes a cooling analysis unit, and the cooling analysis unit is configured with a cooling analysis strategy, and the cooling analysis strategy includes: establishing a plane rectangular coordinate system, recorded as the cooling analysis coordinate system, wherein the horizontal coordinate of the cooling analysis coordinate system is time, and the vertical coordinate is temperature; obtaining the indoor temperature change data of the air-conditioning system of the magnetic levitation phase change air conditioner in the environment of the cooling test under an ideal state based on big data, and in the process of the indoor temperature dropping from the initial temperature to the bottom line temperature after the magnetic levitation phase change air conditioner is started, and drawing a corresponding curve in the cooling analysis coordinate system, recorded as an ideal cooling curve, wherein the ideal state is a state in which the air-conditioning system of the magnetic levitation phase change air conditioner is not affected by the pressure change and temperature change inside the air conditioner;

[0055] In the specific implementation process, in actual implementation, after obtaining the air conditioning system data of the magnetic levitation phase change air conditioner under the ideal state through big data, the operation of the magnetic levitation phase change air conditioner can be simulated using a computer or AI, and the corresponding simulation data can be obtained, so as to obtain the ideal cooling curve; by obtaining the ideal cooling curve, the cooling data of the magnetic levitation phase change air conditioner under the ideal state can be obtained, and by comparing the data with the actual cooling data, it is helpful to obtain the time point when the cooling efficiency changes the most during actual cooling, so as to make a more accurate point judgment in combination with the imbalance time point A and the imbalance temperature;

[0056] In addition, since the cooling efficiency is related to the change in the pressure value in the compressor, that is, the lower the cooling efficiency, the greater the pressure value in the compressor, so obtaining the time point when the cooling efficiency changes the most can also obtain the time point when the pressure in the compressor is the largest, so that the pressure in the compressor can be regulated while regulating the temperature in the air-conditioning system to ensure that the problem of more ineffective work and lower energy utilization efficiency of the magnetic levitation phase-changing air conditioner is prevented;

[0057] The rightmost point of the ideal cooling curve is marked as the cooling end point; the point with the imbalance temperature as the ordinate in the ideal cooling curve is marked as the ideal imbalance point, and the horizontal coordinate of the ideal imbalance point is marked as the imbalance time point B;

[0058] Based on the detection data of the temperature sensor after the magnetic suspension air conditioner is started in the cooling test, a curve is drawn in the cooling analysis coordinate system, which is recorded as the test cooling curve, and the curve whose horizontal coordinate is greater than the cooling end point in the test cooling curve is removed;

[0059] For any point (x3, y3) in the test cooling curve, mark the vertical coordinate of the point with the horizontal coordinate x3 in the ideal cooling curve as y4, and mark the point (x3, ) is recorded as the amplitude point, and |y3-y4| is recorded as the amplitude value; the amplitude points of all points in the cooling test curve are obtained, and the curve fitted by all the amplitude points is recorded as the efficiency amplitude curve; the horizontal coordinate of the amplitude point corresponding to the maximum amplitude value is marked as the maximum amplitude change time;

[0060] In the specific implementation process, for example, in a data processing process, the efficiency amplitude curve obtained is as follows: Figure 4 As shown, curve DD2 is the efficiency amplitude curve. Through analysis, point DD3 is the amplitude point corresponding to the maximum amplitude value, and XX3 is the maximum amplitude change time;

[0061] The point whose horizontal coordinate in the efficiency amplitude curve is the maximum amplitude time is recorded as the maximum amplitude point; the point whose horizontal coordinate in the efficiency amplitude curve is the imbalance time point A and the imbalance time point B is recorded as the imbalance point A and the imbalance point B;

[0062] The closed curve formed by the unbalanced time point A and the maximum amplitude point in the efficiency amplitude curve is recorded as the primary amplitude curve; the closed curve formed by the unbalanced time point B and the maximum amplitude point in the efficiency amplitude curve is recorded as the secondary amplitude curve; the closed curve formed by the unbalanced time point A and the unbalanced time point B is recorded as the unbalanced amplitude curve; the point with the smallest absolute value of the slope in the primary amplitude curve is recorded as the primary amplitude point; the point with the smallest absolute value of the slope in the secondary amplitude curve is recorded as the secondary amplitude point; the point with the smallest absolute value of the slope in the unbalanced amplitude curve is recorded as the unbalanced amplitude point;

[0063] In the specific implementation process, by obtaining the primary amplitude variation curve, the secondary amplitude variation curve and the primary unbalanced amplitude variation curve, and then obtaining the primary amplitude variation point, the secondary amplitude variation point and the unbalanced amplitude variation point; all of them are to obtain the data corresponding to the maximum variation of the cooling efficiency and the maximum pressure in the compressor during the refrigeration process of the air-conditioning system, that is, the amplitude heat dissipation temperature and the unbalanced heat dissipation temperature;

[0064] The vertical coordinates of the first-level amplitude change point and the second-level amplitude change point are marked as the amplitude change heat dissipation temperature; the vertical coordinates of the unbalanced amplitude change point are marked as the unbalanced heat dissipation temperature.

[0065] The system adjustment module is used to control the speed of the exhaust fan in the condenser based on the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature when the air conditioning system is actually used; the system adjustment module includes a system adjustment unit, and the system adjustment unit is used to obtain the temperature of the room where the magnetic levitation phase change air conditioner is located in real time when the air conditioning system of the magnetic levitation phase change air conditioner is actually used, and when the indoor temperature is equal to the unbalanced heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value;

[0066] In the specific implementation process, for example, in a data analysis, the obtained variable amplitude heat dissipation temperature and unbalanced heat dissipation temperature are both 20°C. Then, when the magnetic levitation phase-changing air conditioner is used and the indoor temperature is equal to 20°C, the speed of the exhaust fan in the condenser should be adjusted to the maximum value to ensure that the waste heat generated is fully removed. At the same time, the speed of the exhaust fan in the condenser should be adjusted to the maximum value and the power of the compressor should be adjusted to the rated power to prevent the compressor power from being too large and the pressure in the environment where the compressor is located from being too high, resulting in more ineffective work of the magnetic levitation phase-changing air conditioner;

[0067] When the indoor temperature is equal to any variable-amplitude heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value and the power of the compressor is adjusted to the rated power.

[0068] Example 2, please refer to Figure 2 As shown, the present application also provides a cooling energy-saving control method for a magnetic suspension phase change air conditioning system, comprising the following steps:

[0069] Step S1, using a temperature sensor and a pressure sensor to perform a cooling test on the air conditioning system, and obtaining a temperature-pressure balance curve of the air conditioning system based on the result of the cooling test, and analyzing the temperature-pressure balance curve, and obtaining an imbalance temperature and an imbalance time point based on the analysis result;

[0070] Step S1 includes: step S101, placing the magnetic levitation phase-changing air conditioner in an empty room, placing a temperature sensor in the empty room, and recording the detection result of the temperature sensor as the indoor temperature; recording the indoor temperature when the magnetic levitation phase-changing air conditioner is not started as the initial temperature; placing a pressure sensor in the compressor of the magnetic levitation phase-changing air conditioner, and recording the detection result of the pressure sensor as the compressor pressure value; performing a cooling test on the air conditioning system of the magnetic levitation phase-changing air conditioner; the cooling test is:

[0071] Step S1011, record the lowest temperature that the air conditioning system can cool as the baseline temperature; start the magnetic suspension phase-changing air conditioner, temperature sensor and pressure sensor, and adjust the cooling temperature to the baseline temperature; establish a plane rectangular coordinate system, recorded as the temperature and pressure analysis coordinate system, where the unit of the X-axis of the temperature and pressure analysis coordinate system is time, and the value represented by the Y-axis is Wherein, f is the compressor pressure value, t0 is the initial temperature, and t1 is the indoor temperature; the value of the initial temperature minus the bottom line temperature is recorded as the maximum temperature difference, and the value of the compressor pressure value when the magnetic suspension phase-changing air conditioner is started divided by the maximum temperature difference is recorded as the ideal temperature and pressure value; the straight line Y=ideal temperature and pressure value in the temperature and pressure analysis coordinate system is recorded as the ideal temperature and pressure line;

[0072] Step S1012, when the magnetic suspension phase-changing air conditioner is started and the indoor temperature is lower than the initial temperature, a corresponding curve is drawn in the temperature-pressure analysis coordinate system based on the detected compressor pressure value and the indoor temperature, and the obtained curve is recorded as the temperature-pressure balance curve; the temperature-pressure balance curve is divided into k parts by a straight line parallel to the y-axis, and each part is recorded from left to right as temperature-pressure sub-curve WZ1 to temperature-pressure sub-curve WZ k ;

[0073] Step S1013, for any temperature-pressure sub-curve WZ k1 , get the temperature-barometric subcurve WZ k1 The slope of all points in the temperature-barometric valley is the slope with the smallest absolute value; the temperature-barometric valley curve WZ k1 The coordinates of the leftmost point and the rightmost point are recorded as (x1, y1) and (x2, y2) respectively; the temperature-pressure subcurve WZ is obtained using the subcurve algorithm k1 The corresponding curve reduction, sub-curve algorithm is: Wherein, G is the curve drop value, g1 is the temperature-pressure valley slope; obtain the curve drop values ​​corresponding to all temperature-pressure sub-curves WZ, and record the temperature-pressure sub-curve WZ corresponding to the smallest curve drop value as the imbalance curve, wherein, when there are multiple temperature-pressure sub-curves WZ with the smallest curve drop value, the leftmost temperature-pressure sub-curve WZ among the temperature-pressure sub-curves WZ with the smallest curve drop value is recorded as the imbalance curve;

[0074] Step S1014: record the midpoint of the imbalance curve as the imbalance analysis point, record the indoor temperature in the ordinate of the imbalance analysis point as the imbalance temperature, and mark the abscissa of the imbalance analysis point as the imbalance time point A.

[0075] Step S2, based on the big data, obtain the cooling efficiency of the air-conditioning system during the cooling test under an ideal state and the cooling efficiency of the air-conditioning system during the cooling test in the actual test, and obtain the efficiency amplitude curve; obtain the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature based on the temperature-pressure balance curve and the efficiency amplitude curve;

[0076] Step S2 includes: step S201, establishing a plane rectangular coordinate system, recorded as a cooling analysis coordinate system, wherein the horizontal coordinate of the cooling analysis coordinate system is time, and the vertical coordinate is temperature; obtaining the indoor temperature change data of the air-conditioning system of the magnetic levitation phase change air conditioner in the ideal state in the environment where the cooling test is located, after the magnetic levitation phase change air conditioner is started, in the process of the indoor temperature dropping from the initial temperature to the bottom line temperature, based on big data, and drawing a corresponding curve in the cooling analysis coordinate system, recorded as an ideal cooling curve, wherein the ideal state is a state in which the air-conditioning system of the magnetic levitation phase change air conditioner is not affected by the pressure change and temperature change inside the air conditioner;

[0077] Step S202, marking the rightmost point of the ideal cooling curve as the cooling end point; marking the point with the imbalance temperature as the ideal imbalance point in the ideal cooling curve, and marking the ideal imbalance point as the imbalance time point B;

[0078] Step S203, based on the detection data of the temperature sensor after the magnetic suspension phase-changing air conditioner is started in the cooling test, a curve is drawn in the cooling analysis coordinate system, recorded as a test cooling curve, and the curve whose horizontal coordinate in the test cooling curve is greater than the cooling end point is removed;

[0079] Step S204: for any point (x3, y3) in the test cooling curve, mark the vertical coordinate of the point with the horizontal coordinate x3 in the ideal cooling curve as y4, and mark the point (x3, ) is recorded as the amplitude point, and |y3-y4| is recorded as the amplitude value; the amplitude points of all points in the cooling test curve are obtained, and the curve fitted by all the amplitude points is recorded as the efficiency amplitude curve; the horizontal coordinate of the amplitude point corresponding to the maximum amplitude value is marked as the maximum amplitude change time;

[0080] Step S205, record the point whose horizontal coordinate is the maximum amplitude time in the efficiency amplitude curve as the maximum amplitude point; record the point whose horizontal coordinate is the imbalance time point A and the imbalance time point B in the efficiency amplitude curve as the imbalance point A and the imbalance point B;

[0081] Step S206, record the closed curve formed by the unbalanced time point A and the maximum amplitude point in the efficiency amplitude curve as the primary amplitude curve; record the closed curve formed by the unbalanced time point B and the maximum amplitude point in the efficiency amplitude curve as the secondary amplitude curve; record the closed curve formed by the unbalanced time point A and the unbalanced time point B as the unbalanced amplitude curve; record the point with the smallest absolute value of the slope in the primary amplitude curve as the primary amplitude point; record the point with the smallest absolute value of the slope in the secondary amplitude curve as the secondary amplitude point; record the point with the smallest absolute value of the slope in the unbalanced amplitude curve as the unbalanced amplitude point;

[0082] Step S207, marking the vertical coordinates of the primary amplitude variation point and the secondary amplitude variation point as the amplitude variation heat dissipation temperature; marking the vertical coordinates of the unbalanced amplitude variation point as the unbalanced heat dissipation temperature.

[0083] Step S3, when the air conditioning system is actually used, the speed of the exhaust fan in the condenser is controlled based on the unbalanced heat dissipation temperature and the variable heat dissipation temperature; Step S3 includes:

[0084] Step S301, when the air conditioning system of the magnetic levitation phase change air conditioner is actually used, the temperature of the room where the magnetic levitation phase change air conditioner is located is obtained in real time, and when the indoor temperature is equal to the unbalanced heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value;

[0085] Step S302, when the air-conditioning system of the magnetic levitation phase change air conditioner is actually used, the temperature of the room where the magnetic levitation phase change air conditioner is located is obtained in real time. When the indoor temperature is equal to any variable amplitude heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value and the power of the compressor is adjusted to the rated power.

[0086] Example 3, please refer to Figure 5 As shown, Figure 5The structural schematic diagram of an electronic device is illustrated, and the electronic device may include: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus. The memory stores computer-readable instructions, and the processor can call the instructions in the memory. When the computer-readable instructions are executed by the processor, the steps in a cooling energy-saving control method for a magnetic suspension phase change air-conditioning system are executed to achieve the following functions: first, a cooling test is performed on the air-conditioning system, and a temperature-pressure balance curve of the air-conditioning system is obtained based on the result of the cooling test, and the temperature-pressure balance curve is analyzed, and the imbalance temperature and the imbalance time point are obtained based on the analysis result, and the cooling efficiency of the air-conditioning system in the cooling test process under an ideal state and the cooling efficiency of the air-conditioning system in the cooling test process in an actual test are obtained based on big data, and the efficiency amplitude curve is obtained; the imbalance heat dissipation temperature and the variable amplitude heat dissipation temperature are obtained based on the temperature-pressure balance curve and the efficiency amplitude curve; finally, when the air-conditioning system is actually used, the speed of the exhaust fan in the condenser is controlled based on the imbalance heat dissipation temperature and the variable amplitude heat dissipation temperature.

[0087] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0088] Embodiment 4, the present application also provides a computer-readable storage medium, the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by the processor, the steps in the cooling and energy-saving control method of the magnetic levitation phase change air-conditioning system as mentioned above are executed to achieve the following functions: first, a cooling test is performed on the air-conditioning system, and a temperature-pressure balance curve of the air-conditioning system is obtained based on the result of the cooling test, and the temperature-pressure balance curve is analyzed, and the imbalance temperature and the imbalance time point are obtained based on the analysis result, and the cooling efficiency of the air-conditioning system in the cooling test process under ideal conditions and the cooling efficiency of the air-conditioning system in the cooling test process in actual tests are obtained based on big data, and the efficiency amplitude curve is obtained; the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature are obtained based on the temperature-pressure balance curve and the efficiency amplitude curve; finally, when the air-conditioning system is actually used, the speed of the exhaust fan in the condenser is controlled based on the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature.

[0089] Through the description of the above implementation methods, the embodiments of the present invention can be provided as methods, systems or computer program products. Based on such an understanding, the above technical solutions can be essentially or partly contributed to the prior art in the form of software products, which can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and include several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0090] In the embodiments provided in the present application, it should be understood that the disclosed system or method can be implemented in other ways. The embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or units can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of systems, modules and units can be electrical, mechanical or other forms.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cooling energy-saving control method for a magnetic suspension phase change air conditioning system, characterized in that: The steps include: Use a temperature sensor and a pressure sensor to perform a cooling test on the air conditioning system, and obtain a temperature-pressure balance curve of the air conditioning system based on the results of the cooling test, and analyze the temperature-pressure balance curve to obtain an imbalance temperature and an imbalance time point based on the analysis results; Based on big data, the cooling efficiency of the air-conditioning system in the cooling test process under ideal conditions and the cooling efficiency of the air-conditioning system in the cooling test process in actual tests are obtained, and the efficiency amplitude curve is obtained; based on the temperature-pressure balance curve and the efficiency amplitude curve, the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature are obtained; When the air conditioning system is actually used, the speed of the exhaust fan in the condenser is controlled based on the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature; The cooling test of the air conditioning system using temperature sensors and pressure sensors includes: Place the magnetic levitation disguised phase air conditioner in an empty room, and place a temperature sensor in the empty room, and record the detection result of the temperature sensor as the indoor temperature; record the indoor temperature when the magnetic levitation disguised phase air conditioner is not started as the initial temperature; place a pressure sensor in the compressor of the magnetic levitation disguised phase air conditioner, and record the detection result of the pressure sensor as the compressor pressure value; perform a cooling test on the air conditioning system of the magnetic levitation disguised phase air conditioner; The cooling test is: The lowest temperature that the air conditioning system can cool is recorded as the baseline temperature; the magnetic levitation phase-changing air conditioner, temperature sensor and pressure sensor are started to adjust the cooling temperature to the baseline temperature; a plane rectangular coordinate system is established, recorded as the temperature-pressure analysis coordinate system, where the unit of the X-axis of the temperature-pressure analysis coordinate system is time, and the value represented by the Y-axis is , where f is the compressor pressure value, t0 is the initial temperature, and t1 is the indoor temperature; the value of the initial temperature minus the bottom line temperature is recorded as the maximum temperature difference, and the compressor pressure value when the magnetic suspension phase-changing air conditioner is started is divided by the value of the maximum temperature difference as the ideal temperature and pressure value; the straight line Y=ideal temperature and pressure value in the temperature and pressure analysis coordinate system is recorded as the ideal temperature and pressure line; Cooling tests also include: When the magnetic suspension phase-changing air conditioner is started and the indoor temperature is lower than the initial temperature, a corresponding curve is drawn in the temperature-pressure analysis coordinate system based on the detected compressor pressure value and the indoor temperature, and the obtained curve is recorded as the temperature-pressure balance curve; a straight line parallel to the y-axis is used to divide the temperature-pressure balance curve into k parts, and each part is recorded from left to right as temperature-pressure sub-curve WZ1 to temperature-pressure sub-curve WZ k ; For any temperature-barometric subcurve WZ k1 , get the temperature-barometric subcurve WZ k1 The slope of all points in the temperature-barometric valley is the slope with the smallest absolute value; the temperature-barometric valley curve WZ k1 The coordinates of the leftmost point and the rightmost point are recorded as (x1, y1) and (x2, y2) respectively; use the sub-curve algorithm to obtain the temperature-pressure sub-curve WZ k1 The corresponding curve reduction, sub-curve algorithm is: , where G is the curve drop value, and g1 is the temperature-pressure valley slope; obtain the curve drop values ​​corresponding to all temperature-pressure sub-curves WZ, and record the temperature-pressure sub-curve WZ corresponding to the smallest curve drop value as the imbalance curve, where, when there are multiple temperature-pressure sub-curves WZ with the smallest curve drop value, the leftmost temperature-pressure sub-curve WZ among the temperature-pressure sub-curves WZ with the smallest curve drop value is recorded as the imbalance curve; The midpoint of the imbalance curve is recorded as the imbalance analysis point, the indoor temperature in the ordinate of the imbalance analysis point is recorded as the imbalance temperature, and the abscissa of the imbalance analysis point is marked as the imbalance time point A; Based on big data, the cooling efficiency of the air conditioning system in the cooling test process under ideal conditions and the cooling efficiency of the air conditioning system in the cooling test process in actual tests are obtained, and the efficiency range curve is obtained, including: A plane rectangular coordinate system is established, which is recorded as a temperature reduction analysis coordinate system, wherein the abscissa of the temperature reduction analysis coordinate system is time, and the ordinate is temperature; Based on big data, the air-conditioning system of the magnetic levitation phase change air conditioner in the ideal state is obtained in the environment where the cooling test is carried out. After the magnetic levitation phase change air conditioner is started, the indoor temperature change data in the process of the indoor temperature dropping from the initial temperature to the bottom line temperature is obtained, and the corresponding curve is drawn in the cooling analysis coordinate system, which is recorded as the ideal cooling curve, wherein the ideal state is the state in which the air-conditioning system of the magnetic levitation phase change air conditioner is not affected by the pressure change and temperature change inside the air conditioner; The rightmost point of the ideal cooling curve is marked as the cooling end point, the point with the imbalance temperature as the ordinate in the ideal cooling curve is marked as the ideal imbalance point, and the horizontal coordinate of the ideal imbalance point is marked as the imbalance time point B; Based on big data, the cooling efficiency of the air conditioning system in the cooling test process under ideal conditions and the cooling efficiency of the air conditioning system in the cooling test process in actual tests are obtained, and the efficiency range curve is obtained, which also includes: Based on the detection data of the temperature sensor after the magnetic suspension air conditioner is started in the cooling test, a curve is drawn in the cooling analysis coordinate system, which is recorded as the test cooling curve, and the curve whose horizontal coordinate is greater than the cooling end point in the test cooling curve is removed; For any point (x3, y3) in the test cooling curve, mark the vertical coordinate of the point with the horizontal coordinate x3 in the ideal cooling curve as y4, and mark the point Record as the amplitude point, record |y3-y4| as the amplitude value; obtain the amplitude points of all points in the cooling test curve, and record the curve fitted by all amplitude points as the efficiency amplitude curve; mark the horizontal coordinate of the amplitude point corresponding to the maximum amplitude value as the maximum amplitude change time; Obtaining the unbalanced heat dissipation temperature and variable heat dissipation temperature based on the temperature-pressure balance curve and the efficiency amplitude curve includes: The point whose horizontal coordinate in the efficiency amplitude curve is the maximum amplitude time is recorded as the maximum amplitude point; the point whose horizontal coordinate in the efficiency amplitude curve is the imbalance time point A and the imbalance time point B is recorded as the imbalance point A and the imbalance point B; The closed curve formed by the unbalanced time point A and the maximum amplitude point in the efficiency amplitude curve is recorded as the primary amplitude curve; the closed curve formed by the unbalanced time point B and the maximum amplitude point in the efficiency amplitude curve is recorded as the secondary amplitude curve; the closed curve formed by the unbalanced time point A and the unbalanced time point B is recorded as the unbalanced amplitude curve; the point with the smallest absolute value of the slope in the primary amplitude curve is recorded as the primary amplitude point; the point with the smallest absolute value of the slope in the secondary amplitude curve is recorded as the secondary amplitude point; the point with the smallest absolute value of the slope in the unbalanced amplitude curve is recorded as the unbalanced amplitude point; The vertical coordinates of the first-level amplitude change point and the second-level amplitude change point are marked as the amplitude change heat dissipation temperature; the vertical coordinates of the unbalanced amplitude change point are marked as the unbalanced heat dissipation temperature.

2. The cooling energy-saving control method of a magnetic suspension phase change air conditioning system according to claim 1, characterized in that: Controlling the speed of the exhaust fan in the condenser based on the unbalanced heat dissipation temperature and the variable heat dissipation temperature includes: When the air conditioning system of the magnetic levitation phase change air conditioner is actually used, the temperature of the room where the magnetic levitation phase change air conditioner is located is obtained in real time. When the indoor temperature is equal to the unbalanced heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value.

3. The cooling energy-saving control method of a magnetic suspension phase change air conditioning system according to claim 2 is characterized in that: Controlling the speed of the exhaust fan in the condenser based on the unbalanced heat dissipation temperature and the variable heat dissipation temperature also includes: When the air-conditioning system of the magnetic levitation phase change air conditioner is actually used, the temperature of the room where the magnetic levitation phase change air conditioner is located is obtained in real time. When the indoor temperature is equal to any variable amplitude heat dissipation temperature, the speed of the exhaust fan in the condenser is adjusted to the maximum value and the power of the compressor is adjusted to the rated power.

4. A cooling energy-saving control system for a magnetic levitation phase change air conditioning system, used to implement a cooling energy-saving control method for a magnetic levitation phase change air conditioning system according to any one of claims 1 to 3, characterized in that: Including imbalance analysis module, cooling analysis module and system adjustment module; The imbalance analysis module is used to perform a cooling test on the air conditioning system using a temperature sensor and a pressure sensor, and obtain a temperature-pressure balance curve of the air conditioning system based on the result of the cooling test, and analyze the temperature-pressure balance curve, and obtain an imbalance temperature and an imbalance time point based on the analysis result; The cooling analysis module is used to obtain the cooling efficiency of the air-conditioning system during the cooling test under ideal conditions and the cooling efficiency of the air-conditioning system during the cooling test in actual tests based on big data, and obtain the efficiency amplitude curve; obtain the unbalanced heat dissipation temperature and the variable amplitude heat dissipation temperature based on the temperature-pressure balance curve and the efficiency amplitude curve; The system adjustment module is used to control the speed of the exhaust fan in the condenser based on the unbalanced heat dissipation temperature and the variable heat dissipation temperature when the air conditioning system is actually used.

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