Device and method for testing high-temperature compatibility of refrigerating machine oil and material

Abstract

The invention provides a refrigerating machine oil and material high-temperature compatibility testing device and a testing method, relates to the field of refrigerating machine oil testing, and aims to solve the problems that the testing precision is influenced by a temperature difference area in a container, a sample is polluted by a heating medium, and the testing precision is influenced by interference analysis during a compatibility test at present. A testing device comprising a pressure-resistant container and a drying oven is adopted, the drying oven is provided with a heating cavity for containing the pressure-resistant container, air in the heating cavity serves as a heat transfer medium, a testing cavity is formed in the pressure-resistant container, and the pressure-resistant container and a pressure gauge and a control valve which are attached to the pressure-resistant container can be integrally arranged in the heating cavity; the influence of the temperature difference of the necking position of the end cover on the test precision and the result accuracy is avoided, in addition, the drying oven is used for heating, air is used as a heat transfer medium, the pollution risk caused by the fact that an oil bath medium is attached to the surface of a container like a constant-temperature oil bath system is avoided, the high-temperature compatibility test of refrigerating machine oil and materials can be more accurately carried out, and the test efficiency is improved. And the test accuracy and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the field of testing refrigeration oils, and particularly to a testing device and method for the high-temperature compatibility of refrigeration oils and materials. Background Art

[0002] In a hermetic motor-compressor, the electrical insulation materials and systems inside should be mutually compatible with the refrigerant and oil used in the compressor, and they should also be compatible with each other. And they should also be compatible with other materials inside the housing. When using alternative samples of the same materials as the components of the insulation system, short-term system tests need to be carried out, including infrared analysis, thermal analysis or insulation withstand voltage analysis, to determine whether their performance is the same as the original substances. Therefore, it is necessary to evaluate the compatibility of refrigeration oils, refrigerants and materials. The low-temperature refrigerant inhaled into the compressor cylinder becomes high-temperature and high-pressure after compression. When the compatibility of the refrigeration oil, refrigerant and materials in the cylinder is poor, impurities and other substances will be precipitated, and reactions will occur under high-temperature conditions, resulting in the cracking of the refrigeration oil to form gum carbide. The gum carbide continuously accumulates at the valve plate position in the cylinder, ultimately causing the compressor to seize; in addition, when the compatibility of the refrigerant, refrigeration oil and the internal components of the compressor is poor, impurities will also be precipitated and deposited at the bottom of the oil sump. When the compressor operates, the deposited impurities pose a risk of blocking the oil suction pipe, resulting in problems such as insufficient lubrication of the compressor and induced seizure.

[0003] Chinese Patent (Publication No. CN109991376A, Publication Date: July 9, 2019) discloses a compatibility test system for a quasi-explosion-proof non-metallic insulation material in a refrigeration system. The evacuation and filling system and the pressure vessel form a connection for vacuum pumping and liquid filling; the constant-temperature oil bath system includes an oil bath tank, and the pressure vessel is placed in the oil bath tank; the constant-temperature oil bath system is placed in a quasi-explosion-proof environment system; the measurement and control system monitors and controls and adjusts the environmental parameters of the quasi-explosion-proof environment system; the measurement and control system and the pressure vessel form a data transmission connection for pressure and temperature; the regulation and control of the set temperature are realized through the constant-temperature oil bath system. Although it adopts an end cover necking design to reduce heat leakage at the upper end, there is still a flow channel at the end cover necking position, and lubricating oil and samples still remain inside, and there is still a temperature difference with the oil bath position, affecting the test accuracy; in addition, since it uses oil bath heating, if the entire pressure vessel is placed in the oil bath medium for heating, the surface of the pressure vessel will be attached with the oil bath medium after heating, and there is a risk of contamination when taking out the test sample. The remaining due to the cut-off will interfere with the detection and analysis of the test sample, affecting the accuracy of the test results. Summary of the Invention

[0004] The object of the present invention is to provide a high-temperature compatibility test device and method for refrigeration oil and materials in view of the defects existing in the prior art. The test device includes a pressure-resistant container and an oven. The oven is provided with a heating chamber for accommodating the pressure-resistant container, and the air in the heating chamber is used as the heat transfer medium. A test chamber is formed inside the pressure-resistant container. The pressure-resistant container and the attached pressure gauge and control valve can be integrally placed in the heating chamber, avoiding the influence of the temperature difference at the necking position of the end cover on the test accuracy and result accuracy. In addition, by using the oven for heating and the air as the heat transfer medium, the pollution risk caused by the attachment of the oil bath medium to the container surface like in the constant-temperature oil bath system is avoided, and the high-temperature compatibility test of refrigeration oil and materials can be carried out more accurately, improving the accuracy and reliability of the test.

[0005] The first object of the present invention is to provide a high-temperature compatibility test device for refrigeration oil and materials, adopting the following scheme:

[0006] It includes a pressure-resistant container and an oven. The oven is provided with a heating chamber for accommodating the pressure-resistant container. A test chamber is formed inside the pressure-resistant container. A pressure gauge and a control valve are installed on the container wall of the pressure-resistant container. The pressure gauge is used to measure the pressure in the test chamber. One end of the control valve is communicated with the test chamber, and the other end forms a joint for filling the refrigerant and evacuating the test chamber. The air in the heating chamber is used as the heat transfer medium.

[0007] Further, the main body of the pressure-resistant container is of a cylindrical structure. One end of the cylindrical structure is blocked as the blocking end, and the other end is fitted with a plug cover.

[0008] Further, the plug cover is fitted to one end of the cylindrical structure by threads and forms a seal after fitting.

[0009] Further, the pressure gauge and the control valve are respectively installed on the side wall of the pressure-resistant container, and the pressure gauge and the control valve are arranged at intervals.

[0010] Further, a temperature sensor is installed in the heating chamber of the oven for measuring the ambient temperature of the heating chamber.

[0011] Further, a bracket is installed in the oven, and the bracket supports the pressure-resistant container in the heating chamber.

[0012] The second object of the present invention is to provide a high-temperature compatibility test method for refrigeration oil and materials, using the high-temperature compatibility test device for refrigeration oil and materials provided in the first object, including:

[0013] The compressor parts to be tested and the refrigeration oil are placed in the test chamber of the pressure-resistant container and the test chamber is closed. The test chamber is evacuated through the control valve.

[0014] Then, a refrigerant is filled into the test chamber through the control valve, and the pressure in the test chamber is measured through the pressure gauge to make the pressure meet the set requirements.

[0015] The pressure-resistant container is placed in the heating chamber of the oven, and the pressure-resistant container is heated by the oven and kept warm for a set time before being taken out;

[0016] Take out the compressor parts and refrigeration oil, and analyze the compressor parts.

[0017] Furthermore, after taking out the pressure-resistant container from the oven, the refrigerant inside is first released through the control valve.

[0018] Furthermore, one end of the pressure-resistant container is equipped with a plugging cover for sealing the test cavity, and the plugging cover is opened to place the refrigeration oil and the compressor parts into the test cavity or take them out from the test cavity.

[0019] Furthermore, before placing the pressure-resistant container into the oven, the heating chamber of the oven is preheated.

[0020] Compared with the prior art, the present invention has the following advantages and positive effects:

[0021] In view of the problems that the test accuracy is affected by the temperature difference area in the container and the heating medium contaminates the sample and interferes with the analysis during the current compatibility test, a testing device including a pressure-resistant container and an oven is used. The oven is provided with a heating chamber for accommodating the pressure-resistant container. The air in the heating chamber is used as the heat transfer medium. A test chamber is formed in the pressure-resistant container, and the pressure container and the attached pressure gauge and control valve can be placed in the heating chamber as a whole, avoiding the influence of the temperature difference at the necking position of the end cover on the test accuracy and the accuracy of the results. In addition, the use of oven heating and air as the heat transfer medium avoids the risk of contamination caused by the oil bath medium adhering to the surface of the container like a constant temperature oil bath system, and can more accurately perform high-temperature compatibility tests of refrigeration oil and materials, thereby improving the accuracy and reliability of the test.

[0022] The plugging cover is matched with the cylindrical structure through threads to form a seal. The threaded connection is easy to operate and easy to install and disassemble. When conducting a test, the plugging cover can be easily opened to put in or take out the test sample, refrigeration oil and refrigerant, etc. Moreover, the sealing design can effectively prevent the leakage of refrigerant during the test, ensure the stability of the test environment, avoid inaccurate test data or test failure due to leakage, and ensure the reliability of the test results.

[0023] The pressure gauge and control valve are installed on the side wall of the pressure vessel and arranged at intervals, which is convenient for operators to observe the pressure value and perform control operations. The interval arrangement can avoid mutual interference during operation and improve the accuracy and convenience of operation. The operator can read the pressure data intuitively and adjust the pressure in the test chamber through the control valve in time according to the test requirements to ensure that the test is carried out under the set pressure conditions, which helps to improve the accuracy and efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings of the specification, which form a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0025] Figure 1 It is a schematic structural diagram of a high-temperature compatibility test device for refrigeration oil and materials in one or more embodiments of the present invention.

[0026] Among them, 1, pressure gauge; 2, control valve; 3, pressure-resistant container; 4, plug; 5, oven. Detailed implementation manners

[0027] Embodiment 1

[0028] In a typical embodiment of the present invention, as Figure 1 shown, a high-temperature compatibility test device for refrigeration oil and materials is provided.

[0029] In the existing non-metallic insulation material compatibility test system for refrigeration systems, the temperature difference at the necking position of the end cap affects the test accuracy, and after oil bath heating, the oil bath medium attached to the surface of the container will contaminate the test sample and interfere with the detection and analysis, affecting the accuracy and reliability of the test. Based on this, this embodiment provides a high-temperature compatibility test device for refrigeration oil and materials. The oven 5 is provided with a heating chamber for accommodating the pressure-resistant container 3, and the air in the heating chamber is used as the heat transfer medium. A test chamber is formed inside the pressure-resistant container 3, and a pressure gauge 1 and a control valve 2 are installed on the container wall, which are respectively used to measure the pressure in the test chamber, fill the refrigerant, and evacuate the test chamber. The pressure-resistant container 3 can be entirely placed in the heating chamber to be heated, thus avoiding the temperature difference distribution of the pressure-resistant container 3 and reducing the interference of temperature factors on the test accuracy. Using the oven 5 for heating and the air as the heat transfer medium, it avoids the pollution risk caused by the attachment of the oil bath medium on the surface of the container like the constant-temperature oil bath system, ensuring that the test sample is not contaminated, thereby improving the accuracy and reliability of the test.

[0030] As Figure 1 shown, the high-temperature compatibility test device for refrigeration oil and materials mainly consists of two major parts: a pressure-resistant container 3 and an oven 5. A pressure gauge 1 and a control valve 2 are installed on the pressure-resistant container 3. The inside of the pressure-resistant container 3 is evacuated through the joint on the control valve 2 to access an external negative pressure device, or a refrigerant source can be accessed through the joint on the control valve 2 to fill the refrigerant into the pressure-resistant container 3, and they cooperate with each other to achieve a high-precision and pollution-free compatibility test.

[0031] The test chamber inside the pressure-resistant container 3 is used to place the material samples to be tested and the refrigeration oil. The pressure-resistant container 3 is a steel container capable of withstanding high pressure. After filling with refrigerant and evacuating, it together with the material samples and the refrigeration oil constitutes a test environment. During the entire test process, the pressure-resistant container 3 continuously bears the internal pressure to ensure the stability of the test environment. The test chamber of the pressure-resistant container 3 provides a closed space that can withstand a certain pressure for the refrigeration oil, materials, and refrigerant, simulating the pressure environment inside the compressor, so as to conduct high-temperature compatibility tests under this environment, ensure that the test is carried out in a stable pressure environment, prevent the leakage of test substances, and ensure the safety and accuracy of the test.

[0032] During the test, the pressure gauge 1 is always connected to the test chamber, senses the pressure inside the test chamber, and presents the pressure value in an intuitive way (such as pointer indication or digital display). By monitoring the pressure change inside the test chamber in real time through the pressure gauge 1, pressure data is provided for the operator to judge whether the test is carried out within the predetermined pressure range, enabling the operator to timely grasp the pressure state inside the test chamber. When the pressure is abnormal, it can be adjusted in time to ensure the accuracy of the test conditions, thereby improving the reliability of the test results.

[0033] One end of the control valve 2 is connected to the test chamber, and the other end is connected to an external vacuum pump and a refrigerant storage device. Before the test, the test chamber is first evacuated to a predetermined vacuum degree through the control valve 2, and then an appropriate amount of refrigerant is filled. During the test, the pressure inside the test chamber can also be finely adjusted through the control valve 2 as needed.

[0034] By connecting to the test chamber through the control valve 2, the evacuation operation of the test chamber is realized. After the evacuation is completed, the control valve 2 is closed and waiting for the refrigerant to be filled. After the refrigerant is filled, the control valve 2 is closed to isolate the test chamber from the outside world. By connecting one end joint of the control valve 2 to different external devices or apparatuses, impurities such as air inside the chamber can be removed and the refrigerant can be filled to achieve the purpose of simulating the actual working conditions, accurately controlling the gas composition and the initial pressure state inside the test chamber, ensuring that the test environment meets the test requirements, and improving the accuracy and repeatability of the test.

[0035] After the oven 5 is turned on, the heating elements inside it work to raise the temperature of the air in the heating chamber. Since the pressure-resistant container 3 is placed in the heating chamber, the air transfers heat to the pressure-resistant container 3, thereby heating the test substances inside. The temperature inside the heating chamber is kept stable throughout the process by the temperature control system of the oven 5.

[0036] The oven 5 can provide a stable high-temperature environment. Using the heated air in the chamber as the heat transfer medium, it heats the pressure vessel 3 and the test substance inside it, simulating the high-temperature working conditions inside the compressor, while avoiding the pollution problem caused by oil bath heating. It meets the requirement for the test to be carried out under the set high-temperature conditions, and avoids affecting the test results due to the pollution of the test sample by the heating medium, improving the accuracy and reliability of the test.

[0037] The main body of the pressure vessel 3 adopts a cylindrical structure, with one end sealed and the other end provided with a plug 4, which is convenient for manufacturing and maintenance, and at the same time convenient for placing and taking out the test sample. The plug 4 is sealed by screw thread, which can ensure the sealing performance of the pressure vessel 3, prevent the refrigerant from leaking during the test, and maintain a stable test environment. When preparing for the test, the pressure vessel 3 is opened by rotating the plug 4, and the refrigerating oil, material sample and refrigerant are put in, and then the plug 4 is tightened to form a sealed space. During the test, the plug 4 fits tightly with the cylindrical structure, bears the internal pressure and prevents leakage. The cylindrical structure has uniform stress and can better bear the internal pressure, ensuring the safety of the test. The plug 4 with screw thread seal is easy to operate and has good sealing performance, improving the reliability and repeatability of the test.

[0038] The pressure gauge 1 and the control valve 2 are installed on the side wall of the pressure vessel 3 and arranged at intervals, which is convenient for the operator to observe the pressure data and operate the control valve 2 simultaneously during the test, avoiding interference with each other during operation, and improving the accuracy and convenience of operation. During the test, the pressure gauge 1 monitors the pressure in the test chamber in real time and displays the data. According to the pressure data, the operator operates the control valve 2 to evacuate the test chamber, fill the refrigerant or adjust the pressure, etc. The operator can obtain the pressure information intuitively and in a timely manner, and quickly adjust the pressure in the test chamber according to the need to ensure that the test is carried out under the set pressure conditions, which helps to improve the accuracy and efficiency of the test.

[0039] The temperature sensor is installed in the oven 5 to accurately measure the environmental temperature in the heating chamber, so as to monitor and control the temperature of the oven 5 in real time and ensure that the test is carried out under the set temperature conditions. The temperature sensor continuously collects the temperature data in the heating chamber and transmits the data to the temperature control system of the oven 5. When the temperature deviates from the set value, the temperature control system automatically adjusts the power of the heating element to keep the temperature in the heating chamber stable. It can detect temperature anomalies in a timely manner, ensure the stability of the temperature in the heating chamber through feedback regulation, improve the accuracy and reliability of the test, and avoid affecting the test results due to temperature fluctuations.

[0040] The bracket mounts the pressure-resistant container 3 in the heating chamber, enabling uniform air circulation around the pressure-resistant container 3 to ensure uniform heating. At the same time, it prevents the pressure-resistant container 3 from directly contacting the bottom of the oven 5, avoiding local overheating or uneven heat transfer. During the heating process of the oven 5, the bracket supports the pressure-resistant container 3, allowing air to freely flow around the pressure-resistant container 3 and evenly transfer heat to the pressure-resistant container 3, achieving uniform heating. This improves the heating efficiency and temperature uniformity, reduces test errors, and ensures more reliable and accurate test results.

[0041] Embodiment 2

[0042] In another typical embodiment of the present invention, as Figure 1 shown, a test method for a test device for the high-temperature compatibility of refrigeration oil and materials is given.

[0043] The test method for the test device for the high-temperature compatibility of refrigeration oil and materials utilizes the test device for the high-temperature compatibility of refrigeration oil and materials as in Embodiment 1, and specifically includes the following steps:

[0044] The compressor parts to be tested and the refrigeration oil are placed in the test chamber of the pressure-resistant container 3 and the test chamber is closed, and the inside of the test chamber is evacuated through the control valve 2;

[0045] Then, a refrigerant is filled into the test chamber through the control valve 2, and the pressure in the test chamber is measured by the pressure gauge 1 to make the pressure meet the set requirements;

[0046] The pressure-resistant container 3 is placed in the heating chamber of the oven 5, and the pressure-resistant container 3 is heated by the oven 5 and taken out after being kept warm for a set time;

[0047] The compressor parts and the refrigeration oil are taken out, and the compressor parts are analyzed.

[0048] Specifically, in combination with Embodiment 1 and Figure 1 , the test method is described in detail.

[0049] Preparation stage:

[0050] By opening the plug cover 4 of the pressure-resistant container 3, the compressor parts and the refrigeration oil are put into the test chamber, and then the plug cover 4 is sealed. Then, the control valve 2 is used to connect to an external vacuum device to perform a vacuum operation on the test chamber until the set vacuum degree requirement is reached.

[0051] The compressor parts to be tested and the refrigeration oil are placed in the test chamber of the pressure-resistant container 3 and closed, and then evacuated to remove impurities such as air in the test chamber, simulating a relatively pure working environment inside the compressor, avoiding interference of air components on the test results. Ensure the accuracy and purity of the test environment, improve the reliability of the test results, and reduce abnormal reactions or test errors caused by the presence of impurities.

[0052] Refrigerant Charging and Pressure Regulation

[0053] Connect the refrigerant storage device through the control valve 2 and charge an appropriate amount of refrigerant into the test chamber. During the charging process, closely observe the value of the pressure gauge 1. When the pressure reaches the set requirement, stop charging. If the pressure is too high or too low, fine-tune it through the control valve 2.

[0054] Charge the refrigerant and adjust the pressure to the set requirement to simulate the internal pressure and medium environment during the actual operation of the compressor, making the test conditions more in line with the real working conditions, so as to accurately detect the compatibility between the refrigeration oil and the materials in this environment. Ensure the consistency between the test environment and the actual working environment, making the test results more valuable for reference and being able to effectively reflect the real performance of the refrigeration oil and the materials in the compressor.

[0055] Heating Test Stage

[0056] Place the pressure-resistant container 3 that has been sealed and charged with refrigerant into the heating chamber of the preheated oven 5, start the heating program of the oven 5, and keep the oven 5 at the set temperature and maintain the temperature for a certain period. The temperature sensor in the oven 5 monitors the temperature in real time to ensure the temperature stability.

[0057] Place the pressure-resistant container 3 in the oven 5 for heating and insulation to simulate the high-temperature environment during the operation of the compressor, observe the interaction between the refrigeration oil and the materials of the compressor parts at high temperature, and detect their compatibility. Preheating the oven 5 is to ensure that the pressure-resistant container 3 can quickly reach and stabilize at the set temperature after being placed, reducing the influence of temperature fluctuations on the test results. By simulating the high-temperature working conditions, discover the possible problems that may occur between the refrigeration oil and the compressor parts at high temperature, such as chemical reactions and performance changes, to meet the needs of evaluating their compatibility. Preheating the oven 5 can improve the test efficiency and ensure the accuracy of the test results.

[0058] Post-Test Processing and Analysis

[0059] After taking out the pressure-resistant container 3 from the oven 5, slowly release the internal refrigerant through the control valve 2. After the refrigerant is discharged, open the plug 4 and take out the compressor parts and the refrigeration oil. Use analysis equipment and methods to detect the compressor parts, such as observing the appearance changes and analyzing the composition changes, etc., to evaluate the compatibility.

[0060] After the test, first release the refrigerant, and then take out the parts for analysis to avoid the influence of refrigerant residue on the subsequent analysis, ensuring that the analysis results accurately reflect the compatibility between the refrigeration oil and the materials. Ensure the accuracy of the analysis results, which can clearly judge the compatibility performance between the refrigeration oil and the materials in the high-temperature environment, providing reliable data support for product R & D and quality control.

[0061] Since the oven 5 has more uniform temperature control, when the pressure-resistant container 3 is placed in the heating chamber of the oven 5 for heating, it can better ensure that the refrigeration oil, compressor parts, and refrigerant in the test chamber are in a stable and uniform high-temperature environment. When preheating the heating chamber of the oven 5 before heating, the preheating temperature can be controlled more precisely, so that the temperature fluctuation of the oven 5 is smaller after reaching the set temperature. During the heating process, the temperature sensor feeds back the real-time monitored temperature data to the temperature control system of the oven. If the temperature deviates, the heating power can be quickly adjusted through the temperature control system of the oven 5 to ensure that the temperature in the test chamber remains stable near the set value throughout the entire test process, avoiding deviation of the test results caused by uneven temperature, thereby making the test results more accurate.

[0062] When using a steel container as the pressure-resistant container 3 for the test, when placing the compressor parts and refrigeration oil to be tested into the test chamber of the pressure-resistant container 3, the operator does not need to worry about the risk of container rupture.

[0063] It can be understood that multiple groups of pressure-resistant containers 3 can be placed in the heating chamber of the oven 5 at the same time, and multiple groups of experiments can be carried out simultaneously. When an enterprise conducts R & D verification, multiple identical pressure-resistant containers 3 can be prepared, filled with different compressor part samples or different types of refrigeration oil samples respectively, and then placed in the heating chamber of the oven 5 for testing at the same time. In this way, multiple groups of test data can be obtained within the same time, greatly shortening the R & D verification cycle of the enterprise. Through the comparative analysis of multiple groups of data, the enterprise can more comprehensively and deeply understand the compatibility of refrigeration oil with different materials, and quickly screen out excellent material combinations, thereby improving product quality.

[0064] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-temperature compatibility test device for refrigeration oil and materials, characterized in that, It includes a pressure-resistant container and an oven. The oven is provided with a heating chamber for accommodating the pressure-resistant container. A test chamber is formed inside the pressure-resistant container. A pressure gauge and a control valve are installed on the container wall of the pressure-resistant container. The pressure gauge is used to measure the pressure in the test chamber. One end of the control valve is connected to the test chamber, and the other end forms a connector for filling the refrigerant and evacuating the test chamber. The air in the heating chamber serves as the heat transfer medium.

2. The high-temperature compatibility test device for refrigeration oil and materials according to claim 1, characterized in that, The main body of the pressure-resistant container is of a cylindrical structure. One end of the cylindrical structure is blocked as the blocking end, and the other end is fitted with a plug cover.

3. The high-temperature compatibility test device for refrigeration oil and materials according to claim 2, characterized in that, The plug cover is fitted to one end of the cylindrical structure through threads and forms a seal after fitting.

4. The high-temperature compatibility test device for refrigeration oil and materials according to claim 2 or 3, characterized in that, The pressure gauge and the control valve are respectively installed on the side wall of the pressure-resistant container, and the pressure gauge and the control valve are arranged at intervals.

5. The high-temperature compatibility test device for refrigeration oil and materials according to claim 1, characterized in that, A temperature sensor is installed in the heating chamber of the oven for measuring the ambient temperature of the heating chamber.

6. The high-temperature compatibility test device for refrigeration oil and materials according to claim 1 or 5, characterized in that, A bracket is installed in the oven, and the bracket mounts the pressure-resistant container in the heating chamber.

7. A testing method for a high-temperature compatibility testing device of refrigeration oil and materials, characterized in that, Using the test device for high-temperature compatibility of refrigeration oil and materials according to any one of claims 1-6, it includes: The compressor parts to be tested and the refrigeration oil are placed in the test chamber of the pressure-resistant container and the test chamber is closed. The test chamber is evacuated through the control valve. Then, refrigerant is filled into the test chamber through the control valve. The pressure in the test chamber is measured by the pressure gauge to make the pressure meet the set requirements. The pressure-resistant container is placed in the heating chamber of the oven. After the oven heats the pressure-resistant container and keeps it warm for a set period of time, it is taken out. The compressor parts and the refrigeration oil are taken out and the compressor parts are analyzed.

8. The test method of the test device for high-temperature compatibility of refrigeration oil and materials according to claim 7, characterized in that, After taking out the pressure-resistant container from the oven, first release the internal refrigerant through the control valve.

9. The test method of the test device for the high-temperature compatibility of refrigeration oil and materials according to claim 7, characterized in that, One end of the pressure-resistant container is fitted with a plug cover for blocking the test chamber. The plug cover is opened to place the refrigeration oil and the compressor parts into the test chamber or take them out of the test chamber.

10. The test method of the test device for high-temperature compatibility of refrigeration oil and materials according to claim 9, characterized in that, Before placing the pressure-resistant container into the oven, preheat the heating chamber of the oven.

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