Method, device and medium for installation detection of gas-liquid separator and air conditioner

Abstract

The application discloses a kind of installation detection method, device, medium and air conditioner of gas-liquid separator, by obtaining and comparing the change of friction power after compressor is not carried out oil return operation and carries out oil return operation, utilize the characteristics that friction power directly represents the lubrication state in compressor, accurately judge whether gas-liquid separator is reversed, to solve the prior art lack of gas-liquid separator installation direction detection means, effectively avoid the damage of equipment caused by installation failure, significantly improve the operation reliability and security of air conditioning system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an installation and testing method, device, medium, and air conditioner for a gas-liquid separator. Background Technology

[0002] The function of an air conditioner's gas-liquid separator is to separate the liquid and gaseous components in the refrigerant returning from the evaporator, ensuring that only pure gaseous refrigerant enters the compressor and storing any excess liquid refrigerant.

[0003] If the gas-liquid separator is installed backwards and goes undetected, it will affect the normal operation of the compressor, causing problems such as poor oil return, liquid return, and ultimately liquid slugging in the compressor. Summary of the Invention

[0004] Therefore, it is necessary to provide installation and testing methods, devices, media, and air conditioners for gas-liquid separators to solve the problem that existing technologies cannot detect whether gas-liquid separators are installed backwards.

[0005] In a first aspect, embodiments of this application provide an installation and testing method for a gas-liquid separator, the method comprising: Obtain the first friction power and the second friction power of the compressor; wherein, the first friction power represents the friction power without oil return operation, and the second friction power represents the friction power after oil return operation; If the first friction power and the second friction power meet the first abnormal oil return condition, then it is determined that the gas-liquid separator is installed backwards; wherein, the first abnormal oil return condition represents the condition that the compressor cannot perform normal oil return lubrication.

[0006] In some embodiments of this application, the method for determining the first abnormal return oil condition includes: If the number of times the first friction power and the second friction power satisfy the first condition is greater than the number threshold, then the first oil return abnormal condition is determined to be satisfied; wherein, the first condition is that the second friction power is greater than the first friction power.

[0007] In some embodiments of this application, after obtaining the first frictional power and the second frictional power of the compressor, the method further includes: Obtain the compressor's discharge temperature, heat exchanger temperature, and ambient temperature; If, at the same compressor frequency, the changes in exhaust temperature, heat exchanger temperature, ambient temperature, and friction power satisfy the second abnormal oil return condition, then the gas-liquid separator is determined to be installed in reverse; wherein, the change in friction power includes the change between the first friction power, the change between the second friction power, and the change between the first friction power and the second friction power.

[0008] In some embodiments of this application, the step of determining that the gas-liquid separator is installed backwards if, at the same compressor frequency, the changes in the exhaust temperature, the heat exchanger temperature, the ambient temperature, and the friction power satisfy the second oil return anomaly condition includes: If, at different sampling times under the same compressor frequency, the difference in exhaust temperature is less than a first temperature difference threshold, the difference in heat exchanger temperature is less than a second temperature difference threshold, the difference in ambient temperature is less than a third temperature difference threshold, and the increase in friction power is greater than a proportional threshold, then the gas-liquid separator is determined to be installed backwards.

[0009] In some embodiments of this application, after obtaining the first frictional power and the second frictional power of the compressor, the method further includes: Based on the frictional power at different compressor frequencies, the current frictional power characteristic curves are constructed. The correlation coefficient is obtained by comparing the current friction power characteristic curve with the standard friction power characteristic curve. If the correlation coefficient is less than the correlation coefficient threshold, the gas-liquid separator is determined to be installed backwards; wherein, the standard friction power characteristic curve characterizes the relationship between the friction power of the compressor and the frequency under normal lubrication when the gas-liquid separator is installed correctly.

[0010] In some embodiments of this application, the method for obtaining friction power includes: Obtain the compressor's current input power, current compression power, and volumetric efficiency; The friction power is obtained by subtracting the ratio between the current compression power and the volumetric efficiency from the current input power.

[0011] In some embodiments of this application, the method for obtaining the current compression power includes: The difference between the first enthalpy value and the second enthalpy value is multiplied by the compressor's suction refrigerant density and theoretical gas delivery capacity to obtain the current compression power. The first enthalpy value represents the enthalpy value corresponding to the current discharge pressure and the current condensing temperature in the pressure-enthalpy diagram, and the second enthalpy value represents the enthalpy value corresponding to the current suction pressure and the current evaporation temperature in the pressure-enthalpy diagram.

[0012] Secondly, embodiments of this application also provide an installation detection device for a gas-liquid separator, the installation detection device for the gas-liquid separator comprising: The power acquisition module is used to acquire the first friction power and the second friction power of the compressor; wherein, the first friction power represents the friction power before oil return operation, and the second friction power represents the friction power after oil return operation. The detection module is installed to determine that the gas-liquid separator is installed backwards if the first friction power and the second friction power meet the first abnormal oil return condition; wherein, the first abnormal oil return condition indicates that the compressor cannot perform normal oil return lubrication.

[0013] Thirdly, this application also provides an air conditioner, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps in the above-described gas-liquid separator installation and detection method.

[0014] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps in the above-described gas-liquid separator installation and testing method.

[0015] Fifthly, embodiments of this application also provide a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in the various optional implementations described in embodiments of this application.

[0016] This invention provides a method, device, medium, and air conditioner for detecting the installation of a gas-liquid separator. By acquiring and comparing the change in friction power of the compressor before and after oil return operation, and utilizing the characteristic that friction power directly characterizes the internal lubrication state of the compressor, it accurately determines whether the gas-liquid separator is installed backwards. This solves the problem of the lack of detection methods for the installation direction of gas-liquid separators in the prior art, effectively avoids equipment damage caused by installation errors, and significantly improves the operational reliability and safety of the air conditioning system. Attached Figure Description

[0017] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] in: Figure 1 A schematic diagram showing the normal installation of a gas-liquid separator; Figure 2 A schematic diagram showing a gas-liquid separator installed backwards; Figure 3A schematic flowchart illustrating the installation and testing method for the gas-liquid separator provided in the first embodiment of this application; Figure 4 This is a schematic diagram illustrating the installation and testing process of the gas-liquid separator provided in the second embodiment of this application. Figure 5 This is a schematic diagram of the installation and testing device for a gas-liquid separator. Figure 6 This is a structural block diagram of an air conditioner. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0021] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] This invention provides a method, apparatus, medium, and air conditioner for the installation and testing of a gas-liquid separator. In some embodiments of this application, the provided method for the installation and testing of a gas-liquid separator can be applied to an air conditioner. Specifically, the air conditioner can be applied to different scenarios, including but not limited to industrial air conditioners or household air conditioners. In some embodiments of this application, the air conditioner can be a single unit, such as a cabinet air conditioner or a wall-mounted air conditioner. In some embodiments of this application, the air conditioner can also be a central air conditioning system composed of multiple air conditioner units, such as a multi-split air conditioner, an air-cooled heat pump system, or an air conditioning system with heat recovery function.

[0023] The function of an air conditioner's gas-liquid separator is to separate the liquid and gaseous components of the refrigerant returning from the evaporator, ensuring that only pure gaseous refrigerant enters the compressor and storing excess liquid refrigerant. For example... Figure 1 As shown, the gas-liquid separator is installed in the forward direction: the port of short pipe 10 is the refrigerant inlet, and the port of long pipe 20 is the outlet leading to the compressor. Long pipe 20 has an oil return hole 21. The downward arrow represents the gas-liquid mixture of refrigerant flowing from short pipe 10 into the separator cylinder on the evaporator side, and the upward arrow represents the separated dry saturated gaseous refrigerant being discharged from long pipe 20 to the compressor. The working process of the gas-liquid separator when installed in the forward direction is as follows: after the gas-liquid mixture enters the cylinder from short pipe 10, the flow rate slows down. The liquid refrigerant and oil settle at the bottom of the cylinder due to gravity, while the gaseous refrigerant floats on the upper part of the cylinder. The upper end of long pipe 20 is located in the gas phase zone, where only pure gas is drawn and sent to the compressor. The oil return hole 21 at the bottom of the cylinder can slowly draw in accumulated oil to ensure compressor lubrication. The liquid refrigerant is temporarily stored in the cylinder and then discharged with the gas phase after vaporization.

[0024] If the gas-liquid separator is installed backwards and goes undetected, it will affect the normal operation of the compressor, causing poor oil return, liquid return, and ultimately leading to problems such as liquid slugging in the compressor. Figure 2 As shown, the long pipe 20 becomes the air inlet, and the short pipe 10 becomes the air outlet; the downward arrow indicates the direction of refrigerant flow, and the upward arrow indicates the direction of fluid flow. The gas-liquid mixture reaches the bottom of the cylinder below the liquid surface through the long pipe 20. The airflow directly entrains the liquid refrigerant and oil accumulated at the bottom, and a large amount of it is rushed into the compressor through the short pipe 10. The oil return hole 21 becomes ineffective, the compressor suffers from oil shortage and wear, and continuous liquid slugging will severely damage the internal components.

[0025] Please see Figure 3 , Figure 3 This is a flowchart illustrating the installation and testing method for a gas-liquid separator provided in the first embodiment of this application. Although the logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown in the figures. Specifically, the specific flow of the installation and testing method for a gas-liquid separator provided in the first embodiment of this application is as follows: S101, obtain the first friction power and the second friction power of the compressor.

[0026] The first frictional power represents the frictional power without oil return operation, and the second frictional power represents the frictional power after oil return operation. Frictional power represents the power consumed by the compressor to overcome the frictional resistance between moving parts.

[0027] Optionally, the first friction power and the second friction power of the compressor can be determined by the no-load motoring method, which comprises: placing the compressor in a no-load motoring state (no refrigerant compression load, and only the motor drives the mechanical components to operate), and when oil return operation is not performed and the lubrication state is poor, the measured pure mechanical friction power is the first friction power; after completing the specified oil return operation and fully lubricating each friction pair, no-load motoring is performed again at the same rotational speed / frequency, and the measured pure mechanical friction power is the second friction power.

[0028] In some embodiments of the present application, the acquisition method of friction power (including the first friction power and the second friction power, and the difference only lies in the parameter calculation stage) specifically comprises the following steps: acquiring the current input power, the current compression power and the volumetric efficiency of the compressor. The friction power is obtained by subtracting the ratio of the current compression power to the volumetric efficiency from the current input power.

[0029] Optionally, the current input power can be directly detected and obtained by a power detection module matched with the compressor. The current compression power is calculated by a corresponding compression calculation method. In addition, the actual gas delivery volume and the theoretical gas delivery volume during the operation of the compressor are collected, and the ratio obtained by dividing the actual gas delivery volume by the theoretical gas delivery volume is the volumetric efficiency.

[0030] Optionally, the calculation formula of friction power is expressed as:

[0031] In the above formula, is friction power; is the current input power; is compression power; is volumetric efficiency.

[0032] It can be understood that in the above formula, the current input power of the compressor ultimately has only two destinations: one part is the compression power actually used for compressing refrigerant gas, and the other part is the friction power consumed in the friction of moving parts such as bearings and pistons. At the same time, due to physical phenomena such as gas leakage inside the compressor, the theoretical compression power cannot directly reflect the actual energy conversion in the cylinder, so volumetric efficiency is also introduced for correction.

[0033] In some embodiments of the present application, the acquisition method of the current compression power specifically comprises the following steps: multiplying the difference between the first enthalpy value and the second enthalpy value by the suction refrigerant density and the theoretical gas delivery volume of the compressor to obtain the current compression power.

[0034] The first enthalpy value represents the enthalpy corresponding to the current discharge pressure and the current condensing temperature in the pressure-enthalpy diagram, corresponding to the energy carried by the refrigerant before entering the compressor. The second enthalpy value represents the enthalpy corresponding to the current suction pressure and the current evaporating temperature in the pressure-enthalpy diagram, corresponding to the energy level of the refrigerant after compression.

[0035] Optionally, the formula for calculating the current compression power is expressed as:

[0036] In the above formula, The density of the suction refrigerant is determined by the suction pressure and evaporation temperature. The theoretical gas delivery capacity is equal to the compressor displacement multiplied by the compressor's current frequency. This is the first enthalpy value; This is the second enthalpy value.

[0037] It is understandable that in the above formula The calculation is for the refrigerant mass flow rate (i.e., how many kilograms of gas the compressor moves per second). This represents the energy (enthalpy difference) required to compress a unit mass of refrigerant from low pressure to high pressure. Multiplying the two yields the current compression power that the compressor must consume purely for compressing the gas, without considering mechanical friction and motor losses.

[0038] S102, if the first friction power and the second friction power meet the first abnormal oil return condition, then it is determined that the gas-liquid separator is installed backwards.

[0039] The first abnormal oil return condition indicates that the compressor cannot perform normal oil return lubrication.

[0040] In some embodiments of this application, the method for determining the first abnormal oil return condition in S102 includes: if the number of times the first friction power and the second friction power satisfy the first condition is greater than the number threshold, then it is determined that the first abnormal oil return condition is satisfied.

[0041] The first condition is that the second friction power is greater than the first friction power.

[0042] For example, the number of times threshold can be set to 3. Continuously collect N (N>1) first friction power and second friction power, compare the maximum value of the N second friction power with the maximum value of the N first friction power, determine whether the first condition is met, and count the total number of times the first condition is met. When the total number of times exceeds the preset number of times threshold, it can be determined that the gas-liquid separator is installed backwards.

[0043] Understandably, when the gas-liquid separator is installed correctly, the return oil operation allows lubricating oil to smoothly enter the compressor, improving lubrication and making the second friction power less than or equal to the first friction power. If the gas-liquid separator is installed backwards, the return oil path will be abnormal, the lubricating oil cannot be supplied to the compressor normally, the lubrication effect will be poor, and the mechanical friction loss will continue to increase, which will manifest as the second friction power being greater than the first friction power. By sampling and statistically analyzing multiple times, misjudgments caused by single data fluctuations can be avoided, thus improving the accuracy and reliability of the test results.

[0044] The above embodiments, by acquiring and comparing the changes in friction power of the compressor before and after oil return operation, utilize the characteristic that friction power directly characterizes the internal lubrication state of the compressor to accurately determine whether the gas-liquid separator is installed backwards. This solves the problem of the lack of detection methods for the installation direction of the gas-liquid separator in the prior art, effectively avoids equipment damage caused by installation errors, and significantly improves the operational reliability and safety of the air conditioning system.

[0045] Please see Figure 4 , Figure 4 This is a flowchart illustrating the installation and testing method for a gas-liquid separator provided in the second embodiment of this application. Although the logical sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown in the figures. Specifically, the specific flow of the installation and testing method for a gas-liquid separator provided in the second embodiment of this application is as follows: S201, obtain the first friction power and the second friction power of the compressor.

[0046] S202, if the first friction power and the second friction power meet the first oil return abnormality condition, then it is determined that the gas-liquid separator is installed backwards.

[0047] In some embodiments of this application, the logic of S201-S202 is basically the same as that of S101-S102 in the gas-liquid separator installation and testing method provided in the first embodiment of this application, so it will not be described again.

[0048] S203 obtains the compressor's discharge temperature, heat exchanger temperature, and ambient temperature.

[0049] Optionally, the exhaust temperature is detected using an exhaust temperature sensor, which is fixedly installed at the compressor exhaust pipe and can collect the temperature signal of the compressor exhaust pipe in real time and convert it into a usable exhaust temperature. The heat exchanger temperature is detected using a condenser temperature sensor, which is fixedly installed at the outdoor heat exchanger outlet and can collect the temperature signal at the outdoor heat exchanger outlet in real time and convert it into a usable heat exchanger temperature. The ambient temperature is detected using an outdoor ambient temperature sensor, which is fixedly installed in the return air area of ​​the outdoor heat exchanger and can accurately collect the air temperature around the outdoor heat exchanger and convert it into a usable ambient temperature.

[0050] S204. If, under the same compressor frequency, the changes in exhaust temperature, heat exchanger temperature, ambient temperature, and friction power satisfy the second abnormal oil return condition, then the gas-liquid separator is determined to be installed backwards.

[0051] The change in friction power includes the change between the first friction power, the change between the second friction power, and the change between the first friction power and the second friction power.

[0052] Optionally, the parameters may include, but are not limited to, the parameter difference at different sampling times at the same frequency, the parameter fluctuation amplitude, and the parameter change rate, which are not limited here.

[0053] In some embodiments of this application, if the changes in exhaust temperature, heat exchanger temperature, ambient temperature, and friction power in step S204 satisfy the second abnormal oil return condition under the same compressor frequency, then the gas-liquid separator is determined to be installed backwards. Specifically, this includes the following steps: if, at different sampling times under the same compressor frequency, the difference in exhaust temperature is less than a first temperature difference threshold, the difference in heat exchanger temperature is less than a second temperature difference threshold, the difference in ambient temperature is less than a third temperature difference threshold, and the increase ratio of friction power is greater than a proportional threshold, then the gas-liquid separator is determined to be installed backwards.

[0054] For example, the first, second, and third temperature difference thresholds are all set to 1.5℃, and the proportional threshold is set to 5%. Of course, the above thresholds can also be adjusted to other values ​​according to actual needs. Keeping the compressor operating frequency constant, the exhaust temperature, heat exchanger temperature, ambient temperature, and friction power are recorded at multiple different sampling times. The differences in exhaust temperature, heat exchanger temperature, and ambient temperature between different sampling times are calculated. When the differences in exhaust temperature, heat exchanger temperature, and ambient temperature are all less than the preset temperature difference threshold, and the increase ratio of friction power between the corresponding sampling times is greater than the preset proportional threshold, it can be determined that the gas-liquid separator is installed backwards.

[0055] Understandably, if the exhaust temperature, heat exchanger temperature, and ambient temperature remain relatively stable with minimal fluctuations at the same compressor frequency, it indicates that the system operating conditions have not changed significantly, thus eliminating interference from external conditions on the test results. If the friction power increases significantly at this time, it means that the internal lubrication of the compressor is deteriorating, directly reflecting an abnormal oil return process. The reverse installation of the gas-liquid separator is a typical cause of poor oil return and deteriorated lubrication, which can accurately determine the installation abnormality.

[0056] S205, based on the friction power at different compressor frequencies, constructs the current friction power characteristic curve.

[0057] Friction power data of the compressor at multiple different operating frequencies were collected. The operating frequency was used as the abscissa and the friction power as the ordinate for fitting processing to construct the friction power characteristic curve under the current operating state.

[0058] S206, perform correlation calculation between the current friction power characteristic curve and the standard friction power characteristic curve to obtain the correlation coefficient.

[0059] Alternatively, correlation can be calculated using algorithms such as Pearson correlation coefficient algorithm or Euclidean distance normalization algorithm.

[0060] S207, if the correlation coefficient is less than the correlation coefficient threshold, then the gas-liquid separator is determined to be installed backwards.

[0061] The standard friction power characteristic curve characterizes the relationship between the friction power of the compressor and frequency under normal lubrication conditions when the gas-liquid separator is correctly installed.

[0062] Understandably, if the gas-liquid separator is installed correctly and the compressor lubrication is stable, the current friction power characteristic curve will be highly consistent with the standard curve, and the correlation coefficient will remain at a high level. If the gas-liquid separator is installed backwards, it will cause abnormal oil return, and the lubrication status will change significantly with frequency, causing the current curve to deviate from the standard curve and the correlation coefficient to decrease significantly. This can help to reliably identify whether the installation is incorrect.

[0063] To facilitate better implementation of the gas-liquid separator installation and testing method of this application, this application also provides a gas-liquid separator installation and testing device based on the above-described gas-liquid separator installation and testing method. The meanings of the terms used are the same as in the above-described gas-liquid separator installation and testing method, and specific implementation details can be found in the descriptions in the method embodiments.

[0064] Please see Figure 5 , Figure 5 This is a schematic diagram of the installation and testing device for the gas-liquid separator provided in the embodiments of this application, which may specifically include: The power acquisition module is used to acquire the first friction power and the second friction power of the compressor; wherein, the first friction power represents the friction power without oil return operation, and the second friction power represents the friction power after oil return operation. The detection module is installed to determine that the gas-liquid separator is installed backwards if the first friction power and the second friction power meet the first abnormal oil return condition; wherein, the first abnormal oil return condition indicates that the compressor cannot perform normal oil return lubrication.

[0065] In the above embodiment, the power acquisition module is used to acquire the frictional power of the compressor before and after oil return operation, and the installation detection module is used to compare the changes in frictional power to determine whether the gas-liquid separator is installed backwards. This embodiment utilizes the characteristic that frictional power directly characterizes the internal lubrication state of the compressor to accurately determine whether the gas-liquid separator is installed backwards, thereby solving the problem of the lack of existing technology for detecting the installation direction of the gas-liquid separator, effectively avoiding equipment damage caused by installation errors, and significantly improving the operational reliability and safety of the air conditioning system.

[0066] In some embodiments of this application, the method for determining the first abnormal return oil condition includes: If the number of times the first friction power and the second friction power satisfy the first condition is greater than the number threshold, then the first oil return anomaly condition is determined to be satisfied; wherein, the first condition is that the second friction power is greater than the first friction power.

[0067] In some embodiments of this application, after the power acquisition module acquires the first frictional power and the second frictional power of the compressor, the installation detection module is further used for: Obtain the compressor's discharge temperature, heat exchanger temperature, and ambient temperature; If, at the same compressor frequency, the changes in exhaust temperature, heat exchanger temperature, ambient temperature, and friction power satisfy the second abnormal oil return condition, then the gas-liquid separator is determined to be installed in reverse; wherein, the change in friction power includes the change between the first friction power, the change between the second friction power, and the change between the first friction power and the second friction power.

[0068] In some embodiments of this application, if the installation detection module determines that the gas-liquid separator is installed backwards when the changes in exhaust temperature, heat exchanger temperature, ambient temperature, and friction power meet the second oil return anomaly conditions at the same compressor frequency, the following is included: If, at different sampling times under the same compressor frequency, the difference in exhaust temperature is less than a first temperature difference threshold, the difference in heat exchanger temperature is less than a second temperature difference threshold, the difference in ambient temperature is less than a third temperature difference threshold, and the increase in friction power is greater than a proportional threshold, then the gas-liquid separator is determined to be installed backwards.

[0069] In some embodiments of this application, after the power acquisition module acquires the first frictional power and the second frictional power of the compressor, the installation detection module is further used for: Based on the frictional power at different compressor frequencies, the current frictional power characteristic curves are constructed. The correlation coefficient is obtained by comparing the current friction power characteristic curve with the standard friction power characteristic curve. If the correlation coefficient is less than the correlation coefficient threshold, the gas-liquid separator is determined to be installed backwards; among them, the standard friction power characteristic curve characterizes the relationship between the friction power of the compressor and the frequency under normal lubrication when the gas-liquid separator is installed correctly.

[0070] In some embodiments of this application, the method for obtaining friction power includes: Obtain the compressor's current input power, current compression power, and volumetric efficiency; The friction power is obtained by subtracting the ratio between the current compression power and the volumetric efficiency from the current input power.

[0071] In some embodiments of this application, the current compression power is obtained in the following ways: The difference between the first enthalpy value and the second enthalpy value is multiplied by the compressor's suction refrigerant density and theoretical gas delivery capacity to obtain the current compression power. The first enthalpy value represents the enthalpy value corresponding to the current discharge pressure and the current condensing temperature in the pressure-enthalpy diagram, and the second enthalpy value represents the enthalpy value corresponding to the current suction pressure and the current evaporation temperature in the pressure-enthalpy diagram.

[0072] In addition, this application also provides an air conditioner, such as Figure 6 As shown, it illustrates the structural diagram of the air conditioner involved in this application, specifically: The air conditioner may include components such as a processor 401 with one or more processing cores, a memory 402 with one or more computer-readable storage media, a power supply 403, and an input unit 404. Those skilled in the art will understand that... Figure 6 The air conditioner structure shown does not constitute a limitation on the air conditioner and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein: The processor 401 is the control center of the air conditioner. It connects to various parts of the air conditioner via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 402, and by calling data stored in the memory 402, it performs various functions and processes data, thereby providing overall monitoring of the air conditioner. Optionally, the processor 401 may include one or more processing cores; preferably, the processor 401 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 401.

[0073] The memory 402 can be used to store software programs and modules. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402. The memory 402 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function, etc.; the data storage area may store data created based on the use of the air conditioner, etc. In addition, the memory 402 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 402 may also include a memory controller to provide the processor 401 with access to the memory 402.

[0074] The air conditioner also includes a power supply 403 that supplies power to the various components. Preferably, the power supply 403 can be logically connected to the processor 401 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 403 may also include one or more DC or AC power supplies, recharging systems, power equipment debugging circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0075] The air conditioner may also include an input unit 404, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0076] Although not shown, the air conditioner may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 401 in the air conditioner will load the executable files corresponding to the processes of one or more application programs into the memory 402 according to the following instructions, and the processor 401 will run the application programs stored in the memory 402, thereby realizing the steps in the installation detection method of any gas-liquid separator provided in the embodiments of this application: obtaining the first friction power and the second friction power of the compressor; wherein, the first friction power represents the friction power without oil return operation, and the second friction power represents the friction power after oil return operation; if the first friction power and the second friction power meet the first oil return abnormal condition, it is determined that the gas-liquid separator is installed backwards; wherein, the first oil return abnormal condition represents the condition that the compressor cannot perform normal oil return lubrication.

[0077] The above embodiments, by acquiring and comparing the changes in friction power of the compressor before and after oil return operation, utilize the characteristic that friction power directly characterizes the internal lubrication state of the compressor to accurately determine whether the gas-liquid separator is installed backwards. This solves the problem of the lack of detection methods for the installation direction of the gas-liquid separator in the prior art, effectively avoids equipment damage caused by installation errors, and significantly improves the operational reliability and safety of the air conditioning system.

[0078] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0079] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0080] Therefore, this application provides a computer-readable storage medium storing a computer program that can be loaded by a processor to execute the steps in any of the gas-liquid separator installation and testing methods provided in this application.

[0081] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0082] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0083] Since the instructions stored in the computer-readable storage medium can execute the steps in any of the gas-liquid separator installation and testing methods provided in this application, the beneficial effects that any of the gas-liquid separator installation and testing methods provided in this application can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0084] The above provides a detailed description of the installation and testing method, apparatus, air conditioner, and computer-readable storage medium for a gas-liquid separator provided in this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for installing and testing a gas-liquid separator, characterized in that, The method includes: Obtain the first friction power and the second friction power of the compressor; wherein, the first friction power represents the friction power without oil return operation, and the second friction power represents the friction power after oil return operation; If the first friction power and the second friction power meet the first abnormal oil return condition, then it is determined that the gas-liquid separator is installed backwards; wherein, the first abnormal oil return condition characterizes the condition that the compressor cannot perform normal oil return lubrication.

2. The installation and testing method for a gas-liquid separator according to claim 1, characterized in that, The method for determining the first abnormal return oil condition includes: If the number of times the first friction power and the second friction power satisfy the first condition is greater than the number threshold, then the first oil return abnormal condition is determined to be satisfied; wherein, the first condition is that the second friction power is greater than the first friction power.

3. The installation and testing method for a gas-liquid separator according to claim 1, characterized in that, After obtaining the first friction power and the second friction power of the compressor, the method further includes: Obtain the compressor's discharge temperature, heat exchanger temperature, and ambient temperature; If, at the same compressor frequency, the changes in exhaust temperature, heat exchanger temperature, ambient temperature, and friction power satisfy the second abnormal oil return condition, then the gas-liquid separator is determined to be installed backwards; the change in friction power includes the change between the first friction power, the change between the second friction power, and the change between the first friction power and the second friction power.

4. The installation and testing method for the gas-liquid separator according to claim 3, characterized in that, If, under the same compressor frequency, the changes in exhaust temperature, heat exchanger temperature, ambient temperature, and friction power satisfy the second abnormal oil return condition, then it is determined that the gas-liquid separator is installed backwards, including: If, at different sampling times under the same compressor frequency, the difference in exhaust temperature is less than a first temperature difference threshold, the difference in heat exchanger temperature is less than a second temperature difference threshold, the difference in ambient temperature is less than a third temperature difference threshold, and the increase in friction power is greater than a proportional threshold, then the gas-liquid separator is determined to be installed backwards.

5. The installation and testing method for a gas-liquid separator according to claim 1, characterized in that, After obtaining the first friction power and the second friction power of the compressor, the method further includes: Based on the frictional power at different compressor frequencies, the current frictional power characteristic curves are constructed. The correlation coefficient is obtained by comparing the current friction power characteristic curve with the standard friction power characteristic curve. If the correlation coefficient is less than the correlation coefficient threshold, the gas-liquid separator is determined to be installed backwards; wherein, the standard friction power characteristic curve characterizes the relationship between the friction power of the compressor and the frequency under normal lubrication when the gas-liquid separator is installed correctly.

6. The installation and testing method for a gas-liquid separator according to claim 1, characterized in that, Methods for obtaining frictional power include: Obtain the compressor's current input power, current compression power, and volumetric efficiency; The friction power is obtained by subtracting the ratio between the current compression power and the volumetric efficiency from the current input power.

7. The installation and testing method for a gas-liquid separator according to claim 6, characterized in that, The method for obtaining the current compression power includes: The difference between the first enthalpy value and the second enthalpy value is multiplied by the compressor's suction refrigerant density and theoretical gas delivery capacity to obtain the current compression power. The first enthalpy value represents the enthalpy value corresponding to the current discharge pressure and the current condensing temperature in the pressure-enthalpy diagram, and the second enthalpy value represents the enthalpy value corresponding to the current suction pressure and the current evaporation temperature in the pressure-enthalpy diagram.

8. An installation and testing device for a gas-liquid separator, characterized in that, The installation and testing device for the gas-liquid separator includes: The power acquisition module is used to acquire the first friction power and the second friction power of the compressor; wherein, the first friction power represents the friction power before oil return operation, and the second friction power represents the friction power after oil return operation. The detection module is installed to determine that the gas-liquid separator is installed backwards if the first friction power and the second friction power meet the first abnormal oil return condition; wherein, the first abnormal oil return condition indicates that the compressor cannot perform normal oil return lubrication.

9. A computer-readable storage medium, characterized in that, The device stores a computer program that, when executed by a processor, causes the processor to perform the steps of the method as described in any one of claims 1 to 7.

10. An air conditioner, characterized in that, It includes a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method as described in any one of claims 1 to 7.

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