A new energy automobile electric scroll compressor lubricating oil quantity calibration method

Abstract

The present application relates to the technical field of compressor lubricating oil, and particularly relates to a new energy automobile electric scroll compressor lubricating oil quantity calibration method, comprising the following steps: obtaining an oil quantity calibration test device by building a real vehicle system test bench; using the enthalpy difference method to test and calculate the oil quantity calibration device and record data, and obtaining system refrigerating capacity; setting the suction and discharge temperature and pressure of the compressor; based on the system refrigerating capacity, the suction and discharge temperature and the suction and discharge pressure, setting different working conditions to test the oil quantity calibration test device, and obtaining test data; drawing the test data into a curve graph to obtain inflection point data; and determining the result of lubricating oil quantity according to the inflection point data, the present application designs a lubricating oil calibration method suitable for electric compressors, and solves the problem of low product quality caused by inaccurate lubricating oil quantity of electric compressors.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor lubricating oil, in particular to a new energy vehicle electric scroll compressor lubricating oil oil quantity calibration method. BACKGROUND

[0002] The electric compressor as a vehicle heat system part plays an increasingly important role in the key capabilities of new energy vehicle power battery thermal safety, vehicle endurance mileage, cabin driving comfort, etc., and puts forward higher requirements for the stable work of the electric compressor. During the working process of the compressor, the refrigeration oil has the functions of lubrication, sealing, heat dissipation, noise reduction and adjustment of mechanical power energy.

[0003] However, insufficient refrigeration oil filling amount will increase the movement friction between the internal mechanisms of the compressor, even cause dry grinding and impact noise, reduce the service life, reliability, safety and refrigeration performance of the compressor, and excessive filling amount will reduce the refrigeration capacity of the compressor, increase the power consumption of the compressor, and at the same time increase the cost of the compressor and reduce the product competitiveness. Therefore, as the lubricant of the entire air conditioning system, the refrigeration oil filling amount is a key influencing factor of the air conditioning performance. SUMMARY

[0004] The purpose of the present application is to provide a new energy vehicle electric scroll compressor lubricating oil oil quantity calibration method, which aims to solve the product quality problems caused by inaccurate lubricating oil filling amount of the electric compressor, reduce the risk of abnormal wear and tear, and improve the refrigeration and heating capacity of the air conditioning system.

[0005] To achieve the above purpose, in a first aspect, the present application provides a new energy vehicle electric scroll compressor lubricating oil oil quantity calibration method, comprising the following steps:

[0006] An oil quantity calibration test device is obtained by building a real vehicle system test bench;

[0007] The oil quantity calibration device is tested and calculated using the enthalpy difference method and the data is recorded to obtain the system refrigeration capacity;

[0008] The suction and discharge temperatures and pressures of the compressor are set;

[0009] Based on the system refrigeration capacity, the suction and discharge temperatures and pressures, different working conditions are set for the oil quantity calibration test device to obtain test data;

[0010] The test data is plotted into a curve graph to obtain inflection point data;

[0011] The result of the lubricating oil filling amount is determined according to the inflection point data.

[0012] The building of the real vehicle system test bench to obtain the oil quantity calibration test device comprises:

[0013] Design can read back oil port position liquid level height of compressor;

[0014] According to the actual vehicle state using the original vehicle air conditioning system to build the actual vehicle system test bench.

[0015] Wherein, the use of enthalpy difference method for oil calibration device test calculation and record data, get system refrigeration capacity includes:

[0016] The relationship between the heat transfer amount of the evaporator air side and the oiling amount is used as a determination reference, and the heat transfer amount of the evaporator air side is calculated using the enthalpy difference method to obtain the system refrigeration capacity.

[0017] Wherein, the different working conditions include working condition one, working condition two and working condition three;

[0018] The working condition one includes: according to the actual vehicle system use, confirm the use of the lowest speed value, according to the parking state, set the compressor exhaust pressure, evaporator fan given 2-3 gear wind, test;

[0019] The working condition two includes: according to the actual use, determine the most commonly used compressor speed, the compressor exhaust pressure is set to the commonly used higher pressure value, the evaporator fan is given 2-3 gear wind, test;

[0020] The working condition three includes: according to the compressor use strategy, confirm the highest running speed, the compressor exhaust pressure is set to the commonly used higher pressure value, the evaporator fan is given 2-3 gear wind, test.

[0021] Wherein, the result of determining the lubricating oil filling amount according to the inflection point data includes:

[0022] Take the overlapping section of the first inflection point to the second inflection point of the compressor exhaust temperature and the refrigeration capacity balance section in the inflection point data as the reference area, take the middle value of the overlapping section as the ideal filling amount, consider the influence of leakage and error factors, increase +10ml lubricating oil on the basis of the preset filling amount as the final determination result of the lubricating oil filling amount

[0023] The application discloses a new energy automobile electric scroll compressor lubricating oil oil quantity calibration method. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 is a flow chart of a new energy automobile electric scroll compressor lubricating oil oil quantity calibration method provided by the application.

[0026] Figure 2 is a test flow block diagram of a new energy automobile electric scroll compressor lubricating oil oil quantity calibration method provided by the application.

[0027] Figure 3 is a test device structure diagram.

[0028] Figure 4 is a schematic diagram of an original vehicle air conditioning system. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] Please refer to Figure 1 , in a first aspect, the application provides a new energy automobile electric scroll compressor lubricating oil oil quantity calibration method, comprising the following steps:

[0031] S1, a real vehicle system test bench is built to obtain an oil quantity calibration test device;

[0032] Specifically,

[0033] S11 design can read back oil port position liquid level height of compressor;

[0034] Specifically,

[0035] In order to read the minimum oil level of new energy vehicle scroll compressor, it is convenient to judge whether the oil level submerges the back oil port, and ensure the reliability of the compressor in operation.

[0036] S12 according to the actual vehicle state using the original vehicle air conditioning system to build the actual vehicle system test bench;

[0037] Use innovative small modular suction and exhaust pressure and suction and exhaust temperature integrated test conversion module, the internal pipeline volume is small, and has little influence on the refrigerant and oil filling amount of the actual vehicle system, and can not damage the pipeline, reduce the welding processing measuring point work, can be reused, and is convenient to install.

[0038] S13 set the suction and exhaust temperature and suction and exhaust pressure of the compressor.

[0039] S2 test calculation and data recording are carried out on the oil quantity calibration device using enthalpy difference method, and system refrigerating capacity is obtained;

[0040] Specifically,

[0041] S21 the relationship between the heat transfer amount of the evaporator air side and the oil filling amount is used as a judgment reference;

[0042] S22 calculate the heat transfer amount of the evaporator air side, and obtain the system refrigerating capacity

[0043] Specifically, the heat transfer amount calculation formula is as follows:

[0044] qtci=Qmi(ha1-ha2) / [νn(1+Wn)]

[0045] qtci evaporator refrigerating capacity, unit W

[0046] Qmi nominal working condition air supply, unit m3 / s

[0047] ha1 the enthalpy of air entering the evaporator side, unit J / kg

[0048] ha2 the enthalpy of air leaving the evaporator side, unit J / kg

[0049] νn the specific volume of air at the nozzle, unit m3 / kg

[0050] Wn the moisture content of air at the nozzle, unit kg / kg

[0051] S3 sets the suction and discharge temperature and the suction and discharge pressure of the compressor;

[0052] S4 sets different working conditions based on the system refrigeration capacity, the suction and discharge temperature and the suction and discharge pressure, and tests the oil quantity calibration test device to obtain test data;

[0053] Specifically,

[0054] S41 the different working conditions include: working condition one, working condition two and working condition three;

[0055] S42 the working condition one includes: confirming the lowest rotation speed value according to the actual vehicle system use, setting the compressor discharge pressure according to the parking state, and setting the evaporator fan to 2-3 gear wind volume for testing;

[0056] S43 the working condition two includes: determining the most commonly used compressor rotation speed according to the actual use, setting the compressor discharge pressure to a commonly used higher pressure value, and setting the evaporator fan to 2-3 gear wind volume for testing;

[0057] S44 the working condition three includes: confirming the highest running rotation speed according to the compressor use strategy, setting the compressor discharge pressure to a commonly used higher pressure value, and setting the evaporator fan to 2-3 gear wind volume for testing;

[0058] S45 collects and records the test data of the different working conditions to obtain test data.

[0059] S5 draws the test data into a curve graph to obtain inflection point data;

[0060] S6 determines the result of the lubricating oil quantity according to the inflection point data.

[0061] Specifically,

[0062] S61 takes the overlapping section between the first inflection point and the second inflection point of the compressor discharge temperature and the refrigeration capacity balance section in the inflection point data as the reference area, takes the middle value of the overlapping section as the ideal filling quantity, considers the influence of leakage and error factors, and increases +10ml of lubricating oil quantity based on the preset filling quantity as the final determination result of the lubricating oil filling quantity.

[0063] Beneficial effects:

[0064] 1. The calibration test method of the lubricating oil filling quantity of the electric compressor is provided, which is beneficial to accurately quantifying the oil quantity of the lubricating oil.

[0065] 2. The lubricating oil filling quantity of the electric compressor is reduced, the refrigeration capacity of the electric compressor is optimized, and the mechanical wear under high speed operation is reduced.

[0066] The above disclosed is only a preferred embodiment of the new energy automobile electric scroll compressor lubricating oil oil quantity calibration method of the application, of course, cannot limit the scope of the application, and those skilled in the art can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of the application still belong to the scope covered by the application.

Claims

1. A new energy automobile electric scroll compressor lubricating oil quantity calibration method, characterized in that, Comprising An oil quantity calibration test device is obtained by building a real vehicle system test bench; An enthalpy difference method is used to test and calculate the oil quantity calibration test device and record data, and system refrigeration capacity is obtained; The suction and discharge temperatures and pressures of the compressor are set; Different working conditions are set based on the system refrigeration capacity, the suction and discharge temperatures, and the suction and discharge pressures, and the oil quantity calibration test device is tested, and test data is obtained; The test data is plotted into a curve graph, and inflection point data is obtained; The inflection point data is used to determine the result of the lubricating oil quantity; The oil quantity calibration test device is obtained by building a real vehicle system test bench, and the oil quantity calibration test device comprises: A compressor capable of reading the liquid level of the oil return port is designed; The real vehicle system test bench is built by using the original vehicle air conditioning system according to the real vehicle state; The test data is plotted into a curve graph, and inflection point data is obtained; The relationship between the heat exchange capacity of the evaporator air side and the oil quantity is used as a judgment reference, and the heat exchange capacity of the evaporator air side is calculated using the enthalpy difference method, and the system refrigeration capacity is obtained; The inflection point data is used to determine the result of the lubricating oil quantity, and the determination result comprises: The overlapping section between the first inflection point and the second inflection point of the compressor discharge temperature and the refrigeration capacity balance section in the inflection point data is taken as a reference area, the middle value of the overlapping section is taken as an ideal filling quantity, the influence of leakage and error factors is considered, and +10ml of lubricating oil is added to the preset filling quantity as the final determination result of the lubricating oil filling quantity.

2. The new energy vehicle electric scroll compressor lubricating oil quantity calibration method of claim 1, wherein The different working conditions comprise working condition one, working condition two, and working condition three; The working condition one comprises: according to the use of the real vehicle system, confirming the lowest speed value, setting the compressor discharge pressure according to the parking state, and setting the evaporator fan to 2-3 gear wind volume for testing; The working condition two comprises: according to the actual use, determining the most commonly used compressor speed, setting the compressor discharge pressure to a commonly used higher pressure value, and setting the evaporator fan to 2-3 gear wind volume for testing; The working condition three comprises: according to the compressor use strategy, confirming the highest running speed, setting the compressor discharge pressure to a commonly used higher pressure value, and setting the evaporator fan to 2-3 gear wind volume for testing.

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