A method and system for measuring and adjusting snow stock inventory

Abstract

The present application relates to the technical field of snow adjustment and measurement, and particularly relates to a method and system for measuring and adjusting snow stock, wherein the method for measuring snow stock comprises the following steps: S1: obtaining a target operating temperature value of an air conditioner; S2: obtaining a target operating state according to a temperature value of an indoor room where the air conditioner is located and the target operating temperature value; S3: obtaining a target temperature range, a target pressure range and a target object form of the snow according to a reasonable stock value of the snow in a snow storage and each target operating state; S4: when the air conditioner adjusts the temperature value of the indoor room, sequentially judging whether the snow in the snow storage is too much or too little according to the target temperature range, the target pressure range and the target object form in sequence; and S5: adding or extracting a certain amount of snow stock in the snow storage according to a comparison value of the target temperature range, the target pressure range, the target object form and a snow state at an outlet.

Description

Technical Field

[0001] This invention relates to the field of refrigerant adjustment and measurement technology, and in particular to a method and system for measuring and adjusting refrigerant levels. Background Technology

[0002] In the maintenance of existing air conditioning equipment, it is usually necessary to determine the refrigerant level to ensure the air conditioning system functions properly. Repair technicians in the industry use pressure gauges to check the pressure inside the refrigerant tank, thus indirectly estimating the refrigerant level. While this method is effective, most household users lack the tools or ability to directly monitor the refrigerant level and can only rely on repair personnel for inspection. Therefore, once an air conditioner malfunctions, professional repair services are required to determine whether refrigerant needs to be added. Traditional methods rely on the experience of repair personnel and manual operation, and users typically judge the refrigerant level by feeling the air conditioner's outlet temperature, the outdoor unit temperature, and observing whether the indoor unit leaks water. Therefore, traditional methods have a certain degree of error and lag. Summary of the Invention

[0003] To address the aforementioned shortcomings, the present invention aims to provide a method and system for measuring and adjusting refrigerant levels, thereby overcoming the lag and complexity of traditional refrigerant measurement methods and enabling timely adjustment of air conditioning refrigerant levels when they are abnormal.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A method for measuring and adjusting refrigerant inventory, wherein the method for measuring refrigerant inventory is applied to an air conditioner, the air conditioner including a refrigerant controller, a refrigerant storage device, a compressor, a condenser, an expansion valve, and an evaporator, the refrigerant controller being used to add refrigerant to or remove refrigerant from the refrigerant storage device, and the method for measuring refrigerant inventory comprising the following steps:

[0006] S1: Obtain the target operating temperature value of the air conditioner;

[0007] S2: Based on the indoor temperature value where the air conditioner is located and the target operating temperature value, the target operating state of the compressor, condenser, expansion valve and evaporator is obtained;

[0008] S3: Based on the reasonable refrigerant storage value in the refrigerant storage and the operating states of each target, obtain the target temperature range, target pressure range, and target object shape of the refrigerant at the outlet of the compressor, condenser, expansion valve, and evaporator;

[0009] S4: When the air conditioner adjusts the indoor temperature, the refrigerant status at the outlet of the compressor, condenser, expansion valve and evaporator is obtained, and the refrigerant in the refrigerant storage is determined in the order of compressor, condenser and expansion valve and evaporator according to one or more of the target temperature range, target pressure range and target object shape.

[0010] The refrigerant state includes one or more of the refrigerant's temperature, pressure, and object shape;

[0011] S5: When there is too much or too little refrigerant in the refrigerant storage, the refrigerant controller adds or removes a certain amount of refrigerant from the refrigerant storage based on one or more of the target temperature range, target pressure range, and target object shape, compared with the refrigerant status at the outlet of the compressor, condenser, expansion valve, and evaporator.

[0012] Preferably, in step S4, when the air conditioner is cooling:

[0013] Obtain the temperature and pressure of the refrigerant at the compressor inlet;

[0014] The first temperature difference and the first pressure difference at the compressor inlet and outlet are calculated based on the temperature and pressure of the refrigerant at the compressor inlet and outlet.

[0015] If the temperature of the refrigerant at the compressor outlet is lower than the minimum of the target temperature range of the refrigerant at the compressor outlet and / or the pressure of the refrigerant at the compressor outlet is lower than the minimum of the target pressure range of the pressure at the compressor outlet, then it is determined whether the first temperature difference is less than the minimum difference between the target temperature range of the refrigerant at the compressor outlet and the target temperature range of the refrigerant at the compressor inlet and / or whether the first pressure difference is less than the minimum difference between the target pressure range of the refrigerant at the compressor outlet and the target pressure range of the refrigerant at the compressor inlet. If so, then there is too little refrigerant in the refrigerant memory.

[0016] If the temperature of the refrigerant at the compressor outlet is higher than the maximum value of the target temperature range of the refrigerant at the compressor outlet and / or the pressure of the refrigerant at the compressor outlet is higher than the maximum value of the target pressure range of the pressure at the compressor outlet, then it is determined whether the first temperature difference is greater than the maximum difference between the target temperature range of the refrigerant at the compressor outlet and the target temperature range of the refrigerant at the compressor inlet. If so, then there is too much refrigerant in the refrigerant memory.

[0017] Preferably, step S4 further includes determining whether there is too much or too little refrigerant in the refrigerant storage based on the compressor's operating current;

[0018] The target operating current of the compressor is obtained based on the target operating state of the compressor;

[0019] If the compressor's operating current is less than the target operating current and the difference between the two is greater than the first threshold, then there is too little refrigerant in the refrigerant storage.

[0020] If the compressor's operating current is greater than the target operating current and the difference between the two operating currents is greater than the second threshold, then there is too much refrigerant in the refrigerant storage.

[0021] Preferably, in step S4, when the air conditioner is cooling:

[0022] If the temperature of the refrigerant at the outlet of the condenser is higher than the maximum value of the target temperature range of the refrigerant at the outlet of the condenser, then there is too little refrigerant in the refrigerant storage.

[0023] If the temperature of the refrigerant at the condenser outlet is lower than the minimum value of the target temperature range for the refrigerant at the condenser outlet, then there is too much refrigerant in the refrigerant storage.

[0024] Preferably, in step S4, when the air conditioner is cooling:

[0025] Obtain the gas to liquid ratio at the expansion valve outlet, and determine the target object shape ratio range based on the target object shape at the expansion valve outlet.

[0026] If the gas-to-liquid ratio at the expansion valve outlet is higher than the maximum value of the target object shape ratio range, then there is too little refrigerant in the refrigerant storage.

[0027] If the gas-to-liquid ratio at the expansion valve outlet is lower than the minimum value of the target object's shape ratio range, then there is too much refrigerant in the refrigerant storage.

[0028] Preferably, in step S4, when the air conditioner is cooling:

[0029] Obtain the temperature and pressure of the refrigerant at the outlet of the expansion valve;

[0030] The second temperature difference and the second pressure difference at the inlet and outlet of the expansion valve are calculated based on the temperature and pressure of the refrigerant at the inlet and outlet of the expansion valve.

[0031] If the temperature of the refrigerant at the outlet of the expansion valve is higher than the maximum value of the target temperature range of the refrigerant at the outlet of the expansion valve and / or the pressure of the refrigerant at the outlet of the expansion valve is higher than the maximum value of the target pressure range of the pressure at the outlet of the expansion valve, then it is determined whether the second temperature difference is greater than the maximum difference between the target temperature range of the refrigerant at the outlet of the expansion valve and the target temperature range of the refrigerant at the inlet of the expansion valve and / or whether the second pressure difference is greater than the maximum difference between the target pressure range of the refrigerant at the outlet of the expansion valve and the target pressure range of the refrigerant at the inlet of the expansion valve. If so, then there is too little refrigerant in the refrigerant memory.

[0032] If the temperature of the refrigerant at the outlet of the expansion valve is less than the minimum of the target temperature range of the refrigerant at the outlet of the expansion valve and / or the pressure of the refrigerant at the outlet of the expansion valve is less than the minimum of the target pressure range of the pressure at the outlet of the expansion valve, then it is determined whether the second temperature difference is less than the minimum difference between the target temperature range of the refrigerant at the outlet of the expansion valve and the target temperature range of the refrigerant at the inlet of the expansion valve and / or whether the second pressure difference is less than the minimum difference between the target pressure range of the refrigerant at the outlet of the expansion valve and the target pressure range of the refrigerant at the inlet of the expansion valve. If so, then there is too much refrigerant in the refrigerant memory.

[0033] Preferably, if the air conditioner is in heating mode, in step S4, the refrigerant in the refrigerant storage is determined in sequence according to one or more of the target temperature range, target pressure range, and target object shape, based on the compressor, evaporator, expansion valve, and condenser.

[0034] Preferably, a certain amount of refrigerant is added to or removed from the refrigerant storage device based on a comparison value between one or more of the target temperature range, target pressure range, and target object shape and the refrigerant state at the outlet of the compressor, condenser, expansion valve, and evaporator, satisfying the following relationship:

[0035] Δm=k1·ΔT+k2·ΔP+k3·Δh+β1(ΔT) 2 +β2(ΔP) 2 +β3(Δh) 2 ;

[0036]

[0037] Wherein, Δm represents the amount of refrigerant extracted or added, k1 represents the sensitivity of temperature control to refrigerant quantity adjustment, k2 represents the sensitivity of pressure control to refrigerant quantity adjustment, k3 represents the sensitivity of object shape ratio control to refrigerant quantity adjustment, ΔT represents the difference between the temperature at the outlet of the compressor, condenser, or expansion valve and the maximum or minimum value of the target temperature range, ΔP represents the difference between the pressure at the outlet of the compressor, condenser, or expansion valve and the maximum or minimum value of the target pressure range, and Δh represents the difference between the gas-to-liquid ratio at the expansion valve outlet and the maximum or minimum value of the target object shape ratio range. This indicates the ratio of gas to liquid at the outlet of the expansion valve. β1, β2, and β3 represent the maximum or minimum value of the target object's shape proportion range, respectively, and represent the secondary effects of temperature, pressure, and gas-liquid ratio on the refrigerant inventory adjustment.

[0038] A system for measuring and adjusting refrigerant levels, wherein the system is applied to the method for measuring and adjusting refrigerant levels as described above, and the method for measuring and adjusting refrigerant levels is applied to an air conditioner, the air conditioner including a refrigerant controller, a refrigerant storage device, a compressor, a condenser, an expansion valve, and an evaporator, the refrigerant controller being used to add refrigerant to or remove refrigerant from the refrigerant storage device, and the system for measuring and adjusting refrigerant levels comprising:

[0039] The target temperature acquisition module is used to acquire the target operating temperature value of the air conditioner;

[0040] The operating status calculation module is used to obtain the target operating status of the compressor, condenser, expansion valve and evaporator based on the indoor temperature value where the air conditioner is located and the target operating temperature value;

[0041] The target state setting module is used to obtain the target temperature range, target pressure range, and target object shape of the refrigerant at the outlet of the compressor, condenser, expansion valve, and evaporator based on the reasonable refrigerant storage value in the refrigerant storage and the target operating states of each target.

[0042] The refrigerant storage measurement module is used to obtain the refrigerant status at the outlet of the compressor, condenser, expansion valve and evaporator when the air conditioner adjusts the indoor temperature value, and to determine whether there is too much or too little refrigerant in the refrigerant storage according to one or more of the target temperature range, target pressure range and target object shape in the order of compressor, condenser and expansion valve and evaporator.

[0043] The refrigerant state includes one or more of the refrigerant's temperature, pressure, and object shape;

[0044] The refrigerant storage adjustment module is used to add or remove a certain amount of refrigerant from the refrigerant storage when there is too much or too little refrigerant in the refrigerant storage. This is done by the refrigerant controller based on one or more of the target temperature range, target pressure range, and target object shape, compared with the refrigerant status at the outlet of the compressor, condenser, expansion valve, and evaporator.

[0045] One of the above technical solutions has the following advantages or beneficial effects:

[0046] This invention intelligently monitors the temperature, pressure, and physical state changes of various air conditioner components (such as the compressor, condenser, expansion valve, and evaporator) in real time, automatically detecting and adjusting the refrigerant level. This avoids traditional detection methods that rely on manual experience and specialized tools, improving the operating efficiency and stability of the air conditioner. For users, no professional operating skills or testing equipment are required; the air conditioner can automatically detect and adjust the refrigerant level, greatly simplifying the use and maintenance process. Because it can precisely control the amount of refrigerant used, the air conditioner can maintain efficient cooling / heating while effectively reducing losses caused by too much or too little refrigerant, extending the service life of the air conditioning equipment, and reducing costs caused by frequent maintenance. At the same time, it simplifies the user experience, making the air conditioner more intelligent, convenient, and efficient, increasing its practicality. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0048] Figure 1 This is a flowchart of the method for measuring and adjusting refrigerant stock provided in an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the system for measuring and adjusting refrigerant levels provided in an embodiment of the present invention;

[0050] Figure 3 This is a schematic diagram of the refrigeration system structure of the air conditioner in cooling mode, based on the method for measuring and adjusting refrigerant inventory provided in this embodiment of the invention.

[0051] Figure 4 This is a schematic diagram of the refrigeration system structure of an air conditioner in heating mode, based on the method for measuring and adjusting refrigerant inventory provided in this embodiment of the invention. Detailed Implementation

[0052] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0053] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] In the maintenance of existing air conditioning equipment, it is usually necessary to determine the refrigerant level to ensure the air conditioning system functions properly. Repair technicians in the industry use pressure gauges to check the pressure inside the refrigerant tank, thus indirectly estimating the refrigerant level. While this method is effective, most household users lack the tools or ability to directly monitor the refrigerant level and can only rely on repair personnel for inspection. Therefore, once an air conditioner malfunctions, professional repair services are required to determine whether refrigerant needs to be added. Traditional methods rely on the experience of repair personnel and manual operation, and users typically judge the refrigerant level by feeling the air conditioner's outlet temperature, the outdoor unit temperature, and observing whether the indoor unit leaks water. Therefore, traditional methods have a certain degree of error and lag.

[0055] Therefore, a method for measuring and adjusting refrigerant levels is proposed. This method is applied to an air conditioner, which includes a refrigerant controller, a refrigerant storage unit, a compressor, a condenser, an expansion valve, and an evaporator. The refrigerant controller is used to add or remove refrigerant from the storage unit. Figure 1 As shown, in a preferred embodiment of the present invention, the method for measuring refrigerant inventory includes the following steps:

[0056] S1: Obtain the target operating temperature value of the air conditioner;

[0057] The target operating temperature is the ideal temperature that the air conditioner user wants the air conditioner to adjust to. It is set by the user on the air conditioner remote control or by the air conditioner's automatic adjustment system based on environmental needs. The air conditioner determines whether to start cooling or heating mode by comparing the actual indoor temperature with the target temperature. Various components of the air conditioner (such as the compressor, condenser, expansion valve, and evaporator) need to adjust their working status according to the set target temperature to achieve efficient cooling or heating.

[0058] S2: Based on the indoor temperature value where the air conditioner is located and the target operating temperature value, the target operating state of the compressor, condenser, expansion valve and evaporator is obtained;

[0059] During operation, the difference between the indoor temperature and the target temperature determines how the air conditioner adjusts its working state. If the indoor temperature is higher than the target value, the air conditioner will switch to cooling mode; conversely, if the indoor temperature is lower than the target value, it will switch to heating mode. The air conditioner's control system adjusts the compressor's output power, the condenser's workload, and the responses of the expansion valve and evaporator based on the temperature difference. This allows the air conditioner to adjust the operating modes of each component as needed, thereby maintaining an efficient heat exchange and air conditioning process.

[0060] In practical applications, the specific method involves collecting the current indoor temperature value through the air conditioner's built-in temperature sensor and comparing it with the user-set target temperature. The air conditioner's control system then determines whether to activate cooling or heating mode based on this temperature difference. When the temperature difference is large, the air conditioner will accelerate the activation of its cooling or heating function; when the temperature difference is small, it can adjust the compressor's power or operating speed to more accurately approach the target temperature. By continuously monitoring the indoor temperature and adjusting the air conditioner's operating status in real time (such as compressor frequency, condenser operating mode, etc.), the system ensures that the temperature remains stable near the user-set target value.

[0061] S3: Based on the reasonable refrigerant storage value in the refrigerant storage and the operating states of each target, obtain the target temperature range, target pressure range, and target object shape of the refrigerant at the outlet of the compressor, condenser, expansion valve, and evaporator;

[0062] The amount of refrigerant in the refrigerant reservoir must be within a reasonable range to ensure the normal operation of the air conditioner. Refrigerant, also known as coolant or refrigerant medium, is specified by the air conditioner manufacturer based on the system's requirements. A reasonable refrigerant level affects the system's operating efficiency and stability. Under target operating conditions (such as set temperature value, actual temperature difference, etc.), the air conditioning system sets target ranges for the temperature, pressure, and physical state at the outlets of various components (compressor, condenser, expansion valve, evaporator) according to their operational needs. For example, in cooling mode, the compressor should output a certain pressure and temperature, the condenser should convert high-temperature gas into liquid, and the expansion valve and evaporator should regulate the refrigerant state to ensure normal cooling.

[0063] In practical applications, determining the operating status of each component based on the target operating state involves the linkage between the air conditioning control system and multiple sensors and actuators. The air conditioning system monitors sensors (such as pressure sensors and temperature sensors) to obtain relevant data on the refrigerant level under reasonable conditions, and then calculates the operating status of each component (compressor, expansion valve, condenser, evaporator) under normal refrigerant levels. For example, when the air conditioner is in cooling mode, the compressor needs to compress the refrigerant at a certain power, the condenser needs to effectively dissipate heat and liquefy the refrigerant, and the expansion valve needs to regulate the refrigerant flow to control the refrigerant pressure in the evaporator, enabling the air conditioner to perform efficient heat exchange. Based on these requirements, the air conditioning control system precisely adjusts the operating parameters of each component through actuators, such as the temperature and pressure range of the refrigerant after the compressor compresses the refrigerant, or the ratio of gaseous to liquid refrigerant after the expansion valve processes the refrigerant.

[0064] S4: When the air conditioner adjusts the indoor temperature, the refrigerant status at the outlet of the compressor, condenser, expansion valve and evaporator is obtained, and the refrigerant in the refrigerant storage is determined in the order of compressor, condenser and expansion valve and evaporator according to one or more of the target temperature range, target pressure range and target object shape.

[0065] The refrigerant state includes one or more of the refrigerant's temperature, pressure, and object shape;

[0066] The reason for determining the refrigerant's path based on the order of compressor, condenser, expansion valve, and evaporator is that during refrigeration, the refrigerant's flow is from compressor to condenser to expansion valve to evaporator. Figure 3 As shown, if the compressor is sufficient to determine whether there is a shortage or excess of refrigerant, no further judgment is needed. If the compressor cannot detect a shortage of refrigerant, it can be determined from the condenser, expansion valve, or evaporator. Detecting refrigerant by following its direction can reduce the complexity of the detection process and increase convenience.

[0067] During operation, air conditioners continuously monitor the working status of the compressor, condenser, expansion valve, and evaporator using sensors, particularly the temperature, pressure, and changes in the physical state (gas, liquid, or gas-liquid mixture) at these components. This data helps determine if the refrigerant level is appropriate. If the refrigerant is too low, the compressor's output pressure and temperature will be below normal values; if the refrigerant is too high, the pressure and temperature at the condenser and expansion valve may exceed expected ranges. Specifically, insufficient refrigerant pressure detected at the compressor indicates too little refrigerant; excessively low temperature at the condenser indicates too much refrigerant. By collecting data from different locations, the air conditioner can determine whether refrigerant adjustment is needed.

[0068] S5: When there is too much or too little refrigerant in the refrigerant storage, the refrigerant controller adds or removes a certain amount of refrigerant from the refrigerant storage based on one or more of the target temperature range, target pressure range, and target object shape, compared with the refrigerant status at the outlet of the compressor, condenser, expansion valve, and evaporator.

[0069] When the air conditioner detects an abnormal refrigerant level (too much or too little), the refrigerant controller adjusts the refrigerant level in the refrigerant storage device based on real-time monitored temperature, pressure, and physical state data. If the refrigerant is too low, the air conditioner initiates a refrigerant adding process, with the refrigerant controller injecting new refrigerant into the storage device through pipes. If the refrigerant is too high, the refrigerant controller initiates an extraction process to remove the excess refrigerant. During the adjustment process, the refrigerant controller precisely compares the target temperature range, target pressure range, and target physical state range of the compressor, condenser, expansion valve, and evaporator to ensure that the refrigerant level remains within a reasonable range, preventing insufficient or excessive refrigerant from affecting the air conditioner's operating efficiency.

[0070] By intelligently monitoring the temperature, pressure, and physical state changes of various air conditioning components (such as the compressor, condenser, expansion valve, and evaporator) in real time, the system automatically detects and adjusts the refrigerant level, avoiding traditional methods that rely on manual experience and specialized tools. This improves the operating efficiency and stability of the air conditioner. For users, no professional operating skills or testing equipment are required; the air conditioner can automatically detect and adjust the refrigerant level, greatly simplifying the use and maintenance process. Because it can precisely control the amount of refrigerant used, the air conditioner can maintain efficient cooling / heating while effectively reducing losses caused by too much or too little refrigerant, extending the service life of the air conditioning equipment, and reducing costs caused by frequent maintenance. At the same time, it simplifies the user experience, making the air conditioner more intelligent, convenient, and efficient, and increasing its practicality.

[0071] Preferably, in step S4, when the air conditioner is cooling:

[0072] Obtain the temperature and pressure of the refrigerant at the compressor inlet;

[0073] The first temperature difference and the first pressure difference at the compressor inlet and outlet are calculated based on the temperature and pressure of the refrigerant at the compressor inlet and outlet.

[0074] If the temperature of the refrigerant at the compressor outlet is lower than the minimum of the target temperature range of the refrigerant at the compressor outlet and / or the pressure of the refrigerant at the compressor outlet is lower than the minimum of the target pressure range of the pressure at the compressor outlet, then it is determined whether the first temperature difference is less than the minimum difference between the target temperature range of the refrigerant at the compressor outlet and the target temperature range of the refrigerant at the compressor inlet and / or whether the first pressure difference is less than the minimum difference between the target pressure range of the refrigerant at the compressor outlet and the target pressure range of the refrigerant at the compressor inlet. If so, then there is too little refrigerant in the refrigerant memory.

[0075] If the temperature of the refrigerant at the compressor outlet is higher than the maximum value of the target temperature range of the refrigerant at the compressor outlet and / or the pressure of the refrigerant at the compressor outlet is higher than the maximum value of the target pressure range of the pressure at the compressor outlet, then it is determined whether the first temperature difference is greater than the maximum difference between the target temperature range of the refrigerant at the compressor outlet and the target temperature range of the refrigerant at the compressor inlet. If so, then there is too much refrigerant in the refrigerant memory.

[0076] In the air conditioner's cooling mode, the compressor is responsible for compressing the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas. The temperature and pressure of the refrigerant at the compressor inlet reflect the state of the refrigerant entering the compressor. The temperature and pressure of the refrigerant at the inlet are the basis for calculating whether the refrigerant is sufficient and within the target range. If the temperature or pressure of the refrigerant deviates from the normal value, it may affect the compressor's working efficiency or cause equipment damage.

[0077] Based on the refrigerant temperature and pressure data at the compressor inlet and outlet, the temperature difference (the difference between the refrigerant temperature at the compressor outlet and inlet) and pressure difference (the difference between the refrigerant pressure at the compressor outlet and inlet) can be calculated. These values ​​reflect the compressor's influence on refrigerant compression and temperature changes. If the compressor is operating normally, these two differences should be within a certain range, determined by the indoor temperature and the target set temperature.

[0078] When there is insufficient refrigerant, the amount of gas entering the compressor is insufficient, resulting in lower compressor suction pressure and temperature. Due to the insufficient refrigerant, the compressor's compression efficiency decreases, and the temperature rise of the compressed gas is smaller, leading to a lower compressor outlet temperature. Simultaneously, insufficient refrigerant reduces the compressor's workload, resulting in lower outlet pressure. The pressure and temperature differences between the compressor's inlet and outlet are lower than normal, failing to reach the high-pressure range required for normal operation. In this situation, the air conditioner's cooling effect deteriorates, and the compressor and other system components operate unstablely. Therefore, if there is insufficient refrigerant, the compressor cannot effectively compress the gas, leading to a weakening of the overall cooling effect of the air conditioner, a significant decrease in cooling efficiency, and even a complete failure to cool.

[0079] Conversely, excessive refrigerant leads to a problem when there is too much refrigerant. This results in an excessive amount of gas entering the compressor, causing excessively high pressure and temperature on the suction side. The compressor is overloaded when compressing this excess gas, reducing its efficiency and increasing the temperature and pressure of the compressed gas. Too much refrigerant also causes excessively high compressor discharge pressure, potentially exceeding design limits and leading to malfunctions. Furthermore, excess refrigerant can overload components such as the condenser and expansion valve, further affecting the air conditioner's stability and cooling performance.

[0080] Preferably, step S4 further includes determining whether there is too much or too little refrigerant in the refrigerant storage based on the compressor's operating current;

[0081] The target operating current of the compressor is obtained based on the target operating state of the compressor;

[0082] If the compressor's operating current is less than the target operating current and the difference between the two is greater than the first threshold, then there is too little refrigerant in the refrigerant storage.

[0083] If the compressor's operating current is greater than the target operating current and the difference between the two operating currents is greater than the second threshold, then there is too much refrigerant in the refrigerant storage.

[0084] Specifically, the compressor operates based on the process of drawing in refrigerant vapor and compressing it. When the refrigerant charge is insufficient, the amount of gas drawn into the compressor decreases, leading to a drop in refrigerant pressure and temperature compared to normal conditions. Because of the smaller gas intake, the compressor requires less energy to complete the compression process, thus reducing its operating current. Insufficient refrigerant also results in less gas in the compressor, reducing its load. Since the compressor's working principle is to compress the drawn-in gas into high-pressure gas, a smaller gas volume means the compressor needs less power to complete the compression, leading to a decrease in operating current. Because the compressor itself experiences wear and tear during prolonged operation, its operating current may fluctuate. Therefore, a first threshold is set as a buffer value for whether the compressor is operating normally. Only when the current is less than the target operating current and exceeds the first threshold is it considered that the refrigerant in the refrigerant storage is too low. The target operating current is derived from the compressor's target operating state, determined in step S2 by the indoor temperature, the target operating temperature value, and the model of the air conditioner's refrigeration system. Conversely, if the actual operating current is greater than the target operating current, and the difference between the two is greater than a second threshold, it can be determined that there is too much refrigerant in the refrigerant storage.

[0085] Assuming the compressor's target operating current is 10 amps, the first threshold is 1.5 amps, and the second threshold is 2.0 amps, if the actual operating current is less than the target current but the difference is greater than the first threshold, it indicates insufficient refrigerant. For example, when the compressor's actual operating current is 8 amps, the calculated difference from the target current is 2 amps (10 amps minus 8 amps). Since the difference is greater than the first threshold of 1.5 amps and the actual current is less than the target current, it can be determined that the refrigerant is insufficient. If the actual operating current is greater than the target current and the difference is greater than the second threshold, it indicates excessive refrigerant. For example, when the compressor's actual operating current is 12 amps, the calculated difference from the target current is 2 amps (12 amps minus 10 amps). Since the difference is equal to the second threshold of 2.0 amps and the actual current is greater than the target current, it can be determined that the refrigerant is excessive. If the difference between the actual operating current and the target current is less than the threshold, it indicates that the refrigerant level is within the normal range.

[0086] Preferably, in step S4, when the air conditioner is cooling:

[0087] If the temperature of the refrigerant at the outlet of the condenser is higher than the maximum value of the target temperature range of the refrigerant at the outlet of the condenser, then there is too little refrigerant in the refrigerant storage.

[0088] If the temperature of the refrigerant at the condenser outlet is lower than the minimum value of the target temperature range for the refrigerant at the condenser outlet, then there is too much refrigerant in the refrigerant storage.

[0089] In the refrigeration cycle, refrigerant is compressed by the compressor and enters the condenser. In the condenser, the refrigerant absorbs heat from the surrounding environment and gradually cools down. If there is too little refrigerant, the condenser cannot fully perform its heat dissipation function, causing the refrigerant temperature to fail to drop to the normal value within the target range, and the temperature will be too high. When there is insufficient refrigerant to absorb and transfer heat, the refrigeration system efficiency of the air conditioner will decrease, which is manifested as the temperature at the condenser outlet being higher than the maximum value of the expected target range, thus indicating that there is too little refrigerant in the refrigerant storage.

[0090] The refrigerant in the condenser should be maintained within a certain temperature range. This range is based on normal operating conditions, allowing the refrigerant to effectively release heat while preventing excessive liquid refrigerant from remaining in the condenser. If there is too much refrigerant, the refrigerant will not completely vaporize in the condenser, resulting in excessively low temperatures when the liquid refrigerant enters the evaporator, causing the refrigerant temperature at the condenser outlet to be below the lower limit of the normal range. Too much refrigerant will reduce normal refrigeration efficiency and may cause liquid refrigerant to enter the compressor, adversely affecting it. Therefore, when the condenser outlet temperature is lower than the minimum of the target temperature range, it can be determined that there is too much refrigerant in the refrigerant storage. Since the gas entering the condenser is high-temperature and high-pressure, and becomes low-temperature and high-pressure condensate after being processed by the condenser, the ratio of refrigerant gas content to liquid content at the condenser outlet can also be detected to determine the result of the condenser processing and thus whether there is too much refrigerant. If there is too much refrigerant, the condenser does not have enough time and space for the refrigerant to completely change from a gaseous state to a liquid state. Thus, some refrigerant may still remain in a gaseous state, or even a liquid-gas mixture. Therefore, when there is too much refrigerant, a gas-liquid mixture may appear at the condenser outlet.

[0091] Preferably, in step S4, when the air conditioner is cooling:

[0092] Obtain the gas to liquid ratio at the expansion valve outlet, and determine the target object shape ratio range based on the target object shape at the expansion valve outlet.

[0093] If the gas-to-liquid ratio at the expansion valve outlet is higher than the maximum value of the target object shape ratio range, then there is too little refrigerant in the refrigerant storage.

[0094] If the gas-to-liquid ratio at the expansion valve outlet is lower than the minimum value of the target object's shape ratio range, then there is too much refrigerant in the refrigerant storage.

[0095] The target object shape ratio range is a reasonable range set in the air conditioner design based on the physical properties of the refrigerant and cooling requirements. It indicates that the gas-liquid ratio of the refrigerant at the expansion valve outlet should be within an optimal range. Within this range, the liquid-gas mixture of the refrigerant can efficiently complete the evaporation and heat absorption process, ensuring maximum cooling effect. If the liquid-gas ratio is too high or too low, it may lead to unstable air conditioner performance or damage to the equipment. Therefore, maintaining the gas-liquid ratio at the expansion valve outlet within the target object shape ratio range is crucial to ensuring the normal operation of the air conditioner.

[0096] When the gas-to-liquid ratio at the expansion valve outlet exceeds the maximum value of the target refrigerant ratio range, it means that most of the refrigerant at the outlet is in a gaseous state, with a very low proportion of liquid refrigerant. This results in insufficient liquid refrigerant injected into the evaporator and an excessively high proportion of gaseous refrigerant. In a normal refrigeration system, the expansion valve should control the liquid-to-gas ratio of the refrigerant, keeping it within an appropriate range to ensure that the liquid refrigerant can fully evaporate, absorb heat from the indoor air, and achieve a cooling effect. If the refrigerant charge is too low, there will be insufficient liquid refrigerant, causing gas to dominate at the expansion valve outlet. This indicates that the refrigerant level in the refrigerant reservoir is too low, which will weaken the cooling effect.

[0097] When the gas-to-liquid ratio at the expansion valve outlet is lower than the minimum value within the target refrigerant ratio range, it indicates that most of the refrigerant at the outlet is in a liquid state, with a low proportion of gaseous refrigerant. This means the amount of liquid refrigerant input to the expansion valve is too high, resulting in incomplete vaporization and an insufficient gas ratio. If there is too much liquid refrigerant at the expansion valve outlet, the liquid refrigerant entering the evaporator cannot fully vaporize and effectively absorb heat, reducing the cooling effect. Furthermore, excessive liquid refrigerant may flow into the compressor, posing a risk of liquid slugging. Therefore, when the gas-to-liquid ratio at the expansion valve outlet is lower than the minimum value within the target refrigerant ratio range, it indicates that there is too much refrigerant in the refrigerant reservoir, requiring adjustment.

[0098] Preferably, in step S4, when the air conditioner is cooling:

[0099] Obtain the temperature and pressure of the refrigerant at the outlet of the expansion valve;

[0100] The second temperature difference and the second pressure difference at the inlet and outlet of the expansion valve are calculated based on the temperature and pressure of the refrigerant at the inlet and outlet of the expansion valve.

[0101] If the temperature of the refrigerant at the outlet of the expansion valve is higher than the maximum value of the target temperature range of the refrigerant at the outlet of the expansion valve and / or the pressure of the refrigerant at the outlet of the expansion valve is higher than the maximum value of the target pressure range of the pressure at the outlet of the expansion valve, then it is determined whether the second temperature difference is greater than the maximum difference between the target temperature range of the refrigerant at the outlet of the expansion valve and the target temperature range of the refrigerant at the inlet of the expansion valve and / or whether the second pressure difference is greater than the maximum difference between the target pressure range of the refrigerant at the outlet of the expansion valve and the target pressure range of the refrigerant at the inlet of the expansion valve. If so, then there is too little refrigerant in the refrigerant memory.

[0102] If the temperature of the refrigerant at the outlet of the expansion valve is less than the minimum of the target temperature range of the refrigerant at the outlet of the expansion valve and / or the pressure of the refrigerant at the outlet of the expansion valve is less than the minimum of the target pressure range of the pressure at the outlet of the expansion valve, then it is determined whether the second temperature difference is less than the minimum difference between the target temperature range of the refrigerant at the outlet of the expansion valve and the target temperature range of the refrigerant at the inlet of the expansion valve and / or whether the second pressure difference is less than the minimum difference between the target pressure range of the refrigerant at the outlet of the expansion valve and the target pressure range of the refrigerant at the inlet of the expansion valve. If so, then there is too much refrigerant in the refrigerant memory.

[0103] The second temperature difference refers to the difference between the temperature at the outlet and the inlet of the expansion valve, and the second pressure difference refers to the difference between the pressure at the outlet and the inlet of the expansion valve. Assuming that a certain model of air conditioner is performing a cooling task, the temperature at the inlet of the expansion valve is -5℃ and the pressure is 1.5MPa, while the target temperature range at the outlet of the expansion valve is -10℃ to -8℃ and the target pressure range is 1.2MPa to 1.4MPa. Assuming that the actual temperature at the outlet of the expansion valve is -7℃ and the pressure is 1.45MPa, based on these data, the second temperature difference and the second pressure difference are calculated as follows: The second temperature difference is the expansion valve outlet temperature minus the expansion valve inlet temperature, i.e., -7℃ - (-5℃) = -2℃; the second pressure difference is the expansion valve outlet pressure minus the expansion valve inlet pressure, i.e., 1.45MPa - 1.5MPa = -0.05MPa.

[0104] Next, determine if there is too little or too much refrigerant. First, the temperature at the expansion valve outlet (-7℃) is greater than the maximum value of the target temperature range (-10℃ to -8℃), and the pressure (1.45MPa) exceeds the target range (1.2MPa to 1.4MPa). Assuming the maximum difference between the target temperature range of the refrigerant at the expansion valve outlet and the target temperature range of the refrigerant at the expansion valve inlet is 1℃, and the maximum difference between the target pressure range of the refrigerant at the expansion valve outlet and the target pressure range of the refrigerant at the expansion valve inlet is 0.03MPa, the second temperature difference (2℃) is greater than the maximum difference between the target temperature range of the refrigerant at the expansion valve outlet and the target temperature range of the refrigerant at the expansion valve inlet (1℃). At the same time, the second pressure difference (0.05MPa) is greater than the maximum difference between the target pressure range of the refrigerant at the expansion valve outlet and the target pressure range of the refrigerant at the expansion valve inlet (0.03MPa). This indicates that there is too little refrigerant in the air conditioner, and therefore the refrigerant controller needs to add refrigerant to the refrigerant memory.

[0105] Preferably, if the air conditioner is in heating mode, such as Figure 4 As shown, Figure 4To determine the flow of refrigerant in the air conditioner's refrigeration system during a single refrigeration cycle, step S4 involves sequentially judging whether there is too much or too little refrigerant in the refrigerant storage device based on one or more of the target temperature range, target pressure range, and target object shape, following the order of compressor, evaporator, expansion valve, and condenser.

[0106] Because the cooling and heating cycles of an air conditioning system need to switch operating modes, in cooling mode, the condenser is responsible for cooling the high-temperature, high-pressure refrigerant gas and releasing heat, while the evaporator absorbs heat from the room and evaporates the refrigerant into gas. However, in heating mode, heat from the outside air needs to be transferred to the room. Therefore, the compressor and expansion valve operate in reverse, causing the condenser, which was originally used to cool the air, to become the evaporator, which is used to release heat. The evaporator, which was originally used to absorb heat from the room, becomes the condenser, releasing the heat heated by the compressor to heat the indoor air. Through this reversal, the air conditioner can achieve heating function in winter using the heat pump principle.

[0107] Preferably, a certain amount of refrigerant is added to or removed from the refrigerant storage device based on a comparison value between one or more of the target temperature range, target pressure range, and target object shape and the refrigerant state at the outlet of the compressor, condenser, expansion valve, and evaporator, satisfying the following relationship:

[0108] Δm=k1·ΔT+k2·ΔP+k3·Δh+β1(ΔT) 2 +β2(ΔP) 2 +β3(Δh) 2 ;

[0109]

[0110] Wherein, Δm represents the amount of refrigerant extracted or added, k1 represents the sensitivity of temperature control to refrigerant quantity adjustment, k2 represents the sensitivity of pressure control to refrigerant quantity adjustment, k3 represents the sensitivity of object shape ratio control to refrigerant quantity adjustment, ΔT represents the difference between the temperature at the outlet of the compressor, condenser, or expansion valve and the maximum or minimum value of the target temperature range, ΔP represents the difference between the pressure at the outlet of the compressor, condenser, or expansion valve and the maximum or minimum value of the target pressure range, and Δh represents the difference between the gas-to-liquid ratio at the expansion valve outlet and the maximum or minimum value of the target object shape ratio range. This indicates the ratio of gas to liquid at the outlet of the expansion valve. β1, β2, and β3 represent the maximum or minimum value of the target object's shape proportion range, respectively, and represent the secondary effects of temperature, pressure, and gas-liquid ratio on the refrigerant inventory adjustment.

[0111] Specifically, assuming that the refrigerant level measured at the compressor or condenser is too high or too low, then Δh does not need to be considered, and Δm = k1·ΔT + k2·ΔP + β1(ΔT). 2 +β2(ΔP) 2 k1, k2, and k3 are calculated based on years of engineering experience and the operating rules of air conditioning refrigeration systems. β1, β2, and β3 are obtained through multiple experiments, curve fitting, or regression analysis to find the quadratic relationship between parameters and response. When it is determined at the expansion valve that refrigerant needs to be added, assuming k1 = 0.05, k2 = 0.8, k3 = 1.2, β1 = 0.05, β2 = 0.2, β3 = 0.3, Δh = 0.05, ΔP = 0.3 MPa, and ΔT = 2℃, then Δm = 0.1 + 0.24 + 0.06 + 0.113 = 0.513 kg, indicating that 0.5113 kg of refrigerant needs to be added to the refrigerant storage tank.

[0112] A system for measuring and adjusting refrigerant levels is disclosed. This system is applied to a method for measuring and adjusting refrigerant levels as described above. The method for measuring and adjusting refrigerant levels is applied to an air conditioner. The air conditioner includes a refrigerant controller, a refrigerant storage unit, a compressor, a condenser, an expansion valve, and an evaporator. The refrigerant controller is used to add refrigerant to or remove refrigerant from the refrigerant storage unit. Figure 2 As shown, the system for measuring and adjusting refrigerant levels includes:

[0113] The target temperature acquisition module is used to acquire the target operating temperature value of the air conditioner;

[0114] The operating status calculation module is used to obtain the target operating status of the compressor, condenser, expansion valve and evaporator based on the indoor temperature value where the air conditioner is located and the target operating temperature value;

[0115] The target state setting module is used to obtain the target temperature range, target pressure range, and target object shape of the refrigerant at the outlet of the compressor, condenser, expansion valve, and evaporator based on the reasonable refrigerant storage value in the refrigerant storage and the target operating states of each target.

[0116] The refrigerant storage measurement module is used to obtain the refrigerant status at the outlet of the compressor, condenser, expansion valve and evaporator when the air conditioner adjusts the indoor temperature value, and to determine whether there is too much or too little refrigerant in the refrigerant storage according to one or more of the target temperature range, target pressure range and target object shape in the order of compressor, condenser and expansion valve and evaporator.

[0117] The refrigerant state includes one or more of the refrigerant's temperature, pressure, and object shape;

[0118] The refrigerant storage adjustment module is used to add or remove a certain amount of refrigerant from the refrigerant storage when there is too much or too little refrigerant in the refrigerant storage. This is done by the refrigerant controller based on one or more of the target temperature range, target pressure range, and target object shape, compared with the refrigerant status at the outlet of the compressor, condenser, expansion valve, and evaporator.

[0119] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0120] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for measuring and adjusting refrigerant inventory, the method being applied to an air conditioner, the air conditioner comprising a refrigerant controller, a refrigerant storage device, a compressor, a condenser, an expansion valve, and an evaporator, wherein the refrigerant controller is used to add refrigerant to or remove refrigerant from the refrigerant storage device, characterized in that... The method for measuring and adjusting refrigerant levels includes the following steps: S1: Obtain the target operating temperature value of the air conditioner; S2: Based on the indoor temperature value where the air conditioner is located and the target operating temperature value, the target operating state of the compressor, condenser, expansion valve and evaporator is obtained; S3: Based on the reasonable refrigerant storage value in the refrigerant storage and the operating states of each target, obtain the target temperature range, target pressure range, and target object shape of the refrigerant at the outlet of the compressor, condenser, expansion valve, and evaporator; S4: When the air conditioner adjusts the indoor temperature, the refrigerant status at the outlet of the compressor, condenser, expansion valve and evaporator is obtained, and the refrigerant in the refrigerant storage is determined in the order of compressor, condenser and expansion valve and evaporator according to one or more of the target temperature range, target pressure range and target object shape. The refrigerant state includes one or more of the refrigerant's temperature, pressure, and object shape; S5: When there is too much or too little refrigerant in the refrigerant storage, the refrigerant controller adds or removes a certain amount of refrigerant from the refrigerant storage based on one or more of the target temperature range, target pressure range, and target object shape compared with the refrigerant status at the outlet of the compressor, condenser, expansion valve, and evaporator. In step S4, when the air conditioner is cooling: Obtain the gas to liquid ratio at the expansion valve outlet, and determine the target object shape ratio range based on the target object shape at the expansion valve outlet. If the gas-to-liquid ratio at the expansion valve outlet is higher than the maximum value of the target object shape ratio range, then there is too little refrigerant in the refrigerant storage. If the gas-to-liquid ratio at the expansion valve outlet is lower than the minimum value of the target object's shape ratio range, then there is too much refrigerant in the refrigerant storage.

2. The method for measuring and adjusting refrigerant inventory according to claim 1, characterized in that, In step S4, when the air conditioner is cooling: Obtain the temperature and pressure of the refrigerant at the compressor inlet; The first temperature difference and the first pressure difference at the compressor inlet and outlet are calculated based on the temperature and pressure of the refrigerant at the compressor inlet and outlet. If the temperature of the refrigerant at the compressor outlet is lower than the minimum of the target temperature range of the refrigerant at the compressor outlet and / or the pressure of the refrigerant at the compressor outlet is lower than the minimum of the target pressure range of the pressure at the compressor outlet, then it is determined whether the first temperature difference is less than the minimum difference between the target temperature range of the refrigerant at the compressor outlet and the target temperature range of the refrigerant at the compressor inlet and / or whether the first pressure difference is less than the minimum difference between the target pressure range of the refrigerant at the compressor outlet and the target pressure range of the refrigerant at the compressor inlet. If so, then there is too little refrigerant in the refrigerant memory. If the temperature of the refrigerant at the compressor outlet is higher than the maximum value of the target temperature range of the refrigerant at the compressor outlet and / or the pressure of the refrigerant at the compressor outlet is higher than the maximum value of the target pressure range of the pressure at the compressor outlet, then it is determined whether the first temperature difference is greater than the maximum difference between the target temperature range of the refrigerant at the compressor outlet and the target temperature range of the refrigerant at the compressor inlet. If so, then there is too much refrigerant in the refrigerant memory.

3. The method for measuring and adjusting refrigerant inventory according to claim 1, characterized in that, Step S4 also includes determining whether there is too much or too little refrigerant in the refrigerant storage based on the compressor's operating current; The target operating current of the compressor is obtained based on the target operating state of the compressor; If the compressor's operating current is less than the target operating current and the difference between the two is greater than the first threshold, then there is too little refrigerant in the refrigerant storage. If the compressor's operating current is greater than the target operating current and the difference between the two operating currents is greater than the second threshold, then there is too much refrigerant in the refrigerant storage.

4. The method for measuring and adjusting refrigerant inventory according to claim 1, characterized in that, In step S4, when the air conditioner is cooling: If the temperature of the refrigerant at the outlet of the condenser is higher than the maximum value of the target temperature range of the refrigerant at the outlet of the condenser, then there is too little refrigerant in the refrigerant storage. If the temperature of the refrigerant at the condenser outlet is lower than the minimum value of the target temperature range for the refrigerant at the condenser outlet, then there is too much refrigerant in the refrigerant storage.

5. The method for measuring and adjusting refrigerant inventory according to claim 1, characterized in that, In step S4, when the air conditioner is cooling: Obtain the temperature and pressure of the refrigerant at the outlet of the expansion valve; The second temperature difference and the second pressure difference at the inlet and outlet of the expansion valve are calculated based on the temperature and pressure of the refrigerant at the inlet and outlet of the expansion valve. If the temperature of the refrigerant at the outlet of the expansion valve is higher than the maximum value of the target temperature range of the refrigerant at the outlet of the expansion valve and / or the pressure of the refrigerant at the outlet of the expansion valve is higher than the maximum value of the target pressure range of the pressure at the outlet of the expansion valve, then it is determined whether the second temperature difference is greater than the maximum difference between the target temperature range of the refrigerant at the outlet of the expansion valve and the target temperature range of the refrigerant at the inlet of the expansion valve and / or whether the second pressure difference is greater than the maximum difference between the target pressure range of the refrigerant at the outlet of the expansion valve and the target pressure range of the refrigerant at the inlet of the expansion valve. If so, then there is too little refrigerant in the refrigerant memory. If the temperature of the refrigerant at the outlet of the expansion valve is less than the minimum of the target temperature range of the refrigerant at the outlet of the expansion valve and / or the pressure of the refrigerant at the outlet of the expansion valve is less than the minimum of the target pressure range of the pressure at the outlet of the expansion valve, then it is determined whether the second temperature difference is less than the minimum difference between the target temperature range of the refrigerant at the outlet of the expansion valve and the target temperature range of the refrigerant at the inlet of the expansion valve and / or whether the second pressure difference is less than the minimum difference between the target pressure range of the refrigerant at the outlet of the expansion valve and the target pressure range of the refrigerant at the inlet of the expansion valve. If so, then there is too much refrigerant in the refrigerant memory.

6. The method for measuring and adjusting refrigerant inventory according to claim 1, characterized in that, If the air conditioner is in heating mode, in step S4, the compressor, evaporator, expansion valve and condenser are sequentially judged according to one or more of the target temperature range, target pressure range and target object shape to determine whether there is too much or too little refrigerant in the refrigerant storage.

7. The method for measuring and adjusting refrigerant inventory according to claim 1, characterized in that, Based on a comparison of one or more of the target temperature range, target pressure range, and target object shape with the refrigerant state at the outlet of the compressor, condenser, expansion valve, and evaporator, a certain amount of refrigerant is added to or removed from the refrigerant storage, satisfying the following relationship: in, This indicates the amount of refrigerant extracted or added. This indicates the sensitivity of temperature control to refrigerant quantity adjustment. This indicates the sensitivity of pressure control to refrigerant quantity adjustment. This indicates the sensitivity of adjusting the refrigerant quantity to controlling the proportions of the object's shape. This indicates the difference between the outlet temperature of the compressor, condenser, or expansion valve and the maximum or minimum value of the target temperature range. This indicates the difference between the pressure at the outlet of the compressor, condenser, or expansion valve and the maximum or minimum value of the target pressure range. This indicates the difference between the maximum or minimum value of the gas-to-liquid ratio at the expansion valve outlet and the proportion of the target object's shape. This indicates the ratio of gas to liquid at the outlet of the expansion valve. This indicates the maximum or minimum value within the range of the target object's shape proportions. , and These represent the secondary effects of temperature, pressure, and gas-liquid ratio on refrigerant inventory adjustment, respectively.

8. A system for measuring and adjusting refrigerant inventory, wherein the system for measuring and adjusting refrigerant inventory is applied to the method for measuring and adjusting refrigerant inventory as described in any one of claims 1-7, and the method for measuring and adjusting refrigerant inventory is applied to an air conditioner, the air conditioner comprising a refrigerant controller, a refrigerant storage device, a compressor, a condenser, an expansion valve, and an evaporator, wherein the refrigerant controller is used to add refrigerant to or remove refrigerant from the refrigerant storage device, characterized in that... The system for measuring and adjusting refrigerant levels includes: The target temperature acquisition module is used to acquire the target operating temperature value of the air conditioner; The operating status calculation module is used to obtain the target operating status of the compressor, condenser, expansion valve and evaporator based on the indoor temperature value where the air conditioner is located and the target operating temperature value; The target state setting module is used to obtain the target temperature range, target pressure range, and target object shape of the refrigerant at the outlet of the compressor, condenser, expansion valve, and evaporator based on the reasonable refrigerant storage value in the refrigerant storage and the target operating states of each target. The refrigerant storage measurement module is used to obtain the refrigerant status at the outlet of the compressor, condenser, expansion valve and evaporator when the air conditioner adjusts the indoor temperature value, and to determine whether there is too much or too little refrigerant in the refrigerant storage according to one or more of the target temperature range, target pressure range and target object shape in the order of compressor, condenser and expansion valve and evaporator. The refrigerant state includes one or more of the refrigerant's temperature, pressure, and object shape; The refrigerant storage adjustment module is used to add or remove a certain amount of refrigerant from the refrigerant storage when there is too much or too little refrigerant in the refrigerant storage. This is done by the refrigerant controller based on one or more of the target temperature range, target pressure range, and target object shape, compared with the refrigerant status at the outlet of the compressor, condenser, expansion valve, and evaporator.

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