Metal corrosion electrochemical testing system for refrigerator refrigerating system
By designing a metal corrosion electrochemical test system for refrigerator refrigeration systems, the detection problem of corrosion risks of refrigeration parts materials in refrigerator refrigeration systems is solved, real-time detection and analysis of electrochemical corrosion information of refrigeration parts is realized, detection accuracy and efficiency are improved, and detection costs are reduced.
Patent Information
- Application Number
- CN202421002086.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In refrigerator refrigeration systems, due to the temperature changes of the refrigerant and the complex corrosion environment, there is a risk of corrosion during use of the refrigeration part materials, and it is difficult for the prior art to effectively detect and evaluate the corrosion situation.
A metal corrosion electrochemical test system for refrigerator refrigeration system is designed, including an electrochemical test device and a self-assembled electrode test device. By setting test electrodes, reference electrodes and auxiliary electrodes at different locations in the refrigerator refrigeration cycle circuit and connecting them with the electrochemical test device, real-time detection of corrosion electrochemical information of refrigeration parts is achieved.
Real-time detection of electrochemical corrosion information of refrigeration parts at different locations in the refrigerator refrigeration system is realized, and key parameter information is provided for researching corrosion mechanisms and cost reduction and material replacement, which improves detection accuracy and efficiency, and at the same time reduces detection costs.
Smart Images
Figure CN222882555U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal corrosion and electrochemical testing, in particular to a metal corrosion electrochemical testing system for a refrigerator refrigeration system. Background Art
[0002] The refrigeration principle of the refrigerator is based on the heat absorption when the refrigerant vaporizes from liquid to gas and the heat release when the gas liquefies to liquid. The compressor compresses the refrigerant into high-temperature and high-pressure superheated steam and discharges it into the condenser. The condenser dissipates the heat and cools the refrigerant steam into the air and turns it into a high-temperature and medium-pressure liquid. The high-pressure liquid passes through the capillary throttling, causing the pressure to drop sharply and enter the evaporator. The refrigerant that has passed the capillary throttling expands, boils, and absorbs heat in the evaporator to achieve refrigeration. Under normal working conditions of the refrigerator, the temperature of the condenser can be 50℃~60℃, and the temperature of the evaporator can reach -25℃, which is far from the ambient temperature of the normal use of the refrigerator. Therefore, there is a temperature difference between the inside and outside of the refrigeration pipe. In addition, the state of the refrigerant in the pipe is changeable, and the corrosion environment is very complex, which requires high corrosion resistance of the material. Usually, the pipes used for refrigeration parts are copper pipes, aluminum pipes, steel pipes, etc. Although the material itself has certain corrosion resistance, there are many corrosion influencing factors, and the various corrosion influencing factors affect and promote each other, resulting in a certain corrosion risk of the material.
[0003] Therefore, it is urgent to propose a metal corrosion electrochemical testing system for refrigerator refrigeration systems to achieve accurate measurement of the electrochemical corrosion information of refrigeration parts under working conditions. Utility Model Content
[0004] The utility model aims to solve the above-mentioned problems and provides a metal corrosion electrochemical testing system for a refrigerator refrigeration system, which realizes real-time detection of electrochemical corrosion information of refrigeration parts at different positions of the refrigerator refrigeration system, and provides key parameter information for studying the corrosion mechanism at different parts of the refrigerator refrigeration system and cost reduction and material replacement.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A metal corrosion electrochemical testing system for a refrigerator refrigeration system comprises an electrochemical testing device and a self-assembled electrode testing device. The self-assembled electrode testing device is connected to a testing pipeline of the refrigerator refrigeration system. A reference electrode and an auxiliary electrode are arranged in the self-assembled electrode testing device. The refrigerator refrigeration system is provided with a testing electrode. The reference electrode, the auxiliary electrode and the testing electrode are respectively connected to the electrochemical testing device.
[0007] Preferably, the self-assembled electrode testing device comprises a front test piece and a rear test piece, and the front test piece and the rear test piece are connected by bolts.
[0008] Preferably, the front test piece and the rear test piece are symmetrically arranged, and both the front test piece and the rear test piece are provided with a locking piece and a sleeve, the locking piece is a truncated cone structure with a hollow interior, one end of the locking piece is connected to the standard pipeline, and the other end is connected to the sleeve, and a sleeve groove is provided in the sleeve;
[0009] A reference electrode and an auxiliary electrode are arranged on the outer wall of the sleeve of the front test piece, and the test electrodes in the refrigerator refrigeration system test pipeline are placed in the sleeve grooves of the front test piece and the rear test piece. The reference electrode, the auxiliary electrode and the test electrode are respectively connected to the electrochemical testing device through wires.
[0010] Preferably, a plurality of bolt holes are evenly spaced on the outer wall of the sleeve of the front test piece, and a plurality of bolt holes are correspondingly arranged on the outer wall of the sleeve of the rear test piece. The bolts are passed through the bolt holes and fixed with nuts to fix the front test piece and the rear test piece.
[0011] Preferably, the locking member and the sleeve are interference fit.
[0012] Preferably, a sealing ring is provided between the locking member and the sleeve.
[0013] Preferably, the reference electrode is configured as an Ag / AgCl electrode, and the auxiliary electrode is a titanium-based noble metal oxide anode.
[0014] Preferably, the test electrode is a metal pipe arranged in an evaporator, a condenser or a capillary tube of a refrigerator refrigeration system; silicone gaskets are sleeved at both ends of the test electrode to seal the test electrode and the sleeve.
[0015] Preferably, the front test piece and the rear test piece are both polytetrafluoroethylene injection molded parts.
[0016] Preferably, the inner diameter of the sleeve is larger than the inner diameter of the test electrode and smaller than the inner diameter of the test pipe, the inner diameter of the top end of the locking piece is smaller than the inner diameter of the bottom end, and the inner diameter of the tail end of the locking piece is equal to the inner diameter of the sleeve and smaller than the inner diameter of the test pipe.
[0017] Beneficial technical effects brought by the utility model:
[0018] The utility model proposes a metal corrosion electrochemical testing system for a refrigerator refrigeration system. The self-assembled electrode testing device in the metal corrosion electrochemical testing system is set according to the actual pipe size of the refrigerator refrigeration cycle loop, and the self-assembled electrode testing device is tightly combined with the pipe to be tested. The self-assembled electrode testing device is freely spliced at different positions of the refrigerator refrigeration cycle loop for simultaneous measurement, which not only realizes the long-term detection of the metal corrosion electrochemical information of the refrigerator refrigeration cycle loop, but also effectively reduces the cost required for the detection of the metal corrosion electrochemical information of the refrigerator refrigeration system, and improves the accuracy and efficiency of the metal corrosion electrochemical testing system in the detection of the refrigerator refrigeration system.
[0019] The self-assembled electrode test device proposed in the utility model provides a sealing ring between the locking member and the sleeve, and rotates and locks the locking member and the sleeve to seal, thereby effectively preventing leakage of refrigerant in the refrigerator refrigeration cycle during the detection process. The locking member and the sleeve in the self-assembled electrode test device have an interference fit, and are tightly connected by a rotating sleeve, which is easy to operate and install. At the same time, silicone gaskets are provided at both ends of the test electrode, and the front test piece and the rear test piece of the self-assembled electrode test device are fixed by bolts, which not only firmly fixes the self-assembled electrode test device on the test pipeline of the refrigerator refrigeration cycle, but also achieves a close fit between the test electrode and the silicone gasket, further improving the overall sealing of the self-assembled electrode test device. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 The utility model is a schematic diagram of a metal corrosion electrochemical testing system for a refrigerator refrigeration system.
[0021] Figure 2 It is a schematic diagram of the metal corrosion electrochemical testing system in the utility model.
[0022] Figure 3 It is a schematic diagram of the self-assembled electrode testing device in the utility model.
[0023] Figure 4 It is a schematic diagram of the front test piece in the self-assembled electrode testing device of the utility model.
[0024] In the figure: 1. compressor, 2. condenser, 3. drying filter, 4. capillary, 5. evaporator, 6. standard pipeline, 7-1. locking piece, 7-2. sleeve, 8. test electrode, 9. reference electrode, 10. auxiliary electrode, 11. bolt, 12. nut, 13. electrochemical test device, 14. sealing ring, 15. silicone gasket. DETAILED DESCRIPTION
[0025] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0027] In the present invention, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention. They do not specifically refer to any part or element in the present invention and cannot be understood as limitations on the present invention.
[0028] In the present utility model, terms such as "connected" and "connection" should be understood in a broad sense, indicating that the connection can be fixed, integral or detachable; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meaning of the above terms in the present utility model can be determined according to specific circumstances, and it cannot be understood as a limitation of the present utility model.
[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0030] The utility model proposes a metal corrosion electrochemical testing system for refrigerator refrigeration system, which is applied to Figure 1 In the refrigerator refrigeration system shown, the refrigerator refrigeration system includes a compressor 1, a condenser 2, a drying filter 3, a capillary tube 4 and an evaporator 5. The outflow end of the compressor is connected to the inflow ends of the condenser, the drying filter, the capillary tube and the evaporator in sequence through a refrigeration system circulation pipeline, and then the outflow end of the evaporator is connected to the inflow end of the compressor to form a refrigerator refrigeration cycle loop. Refrigerant flows in the refrigerator refrigeration cycle loop. The refrigerant exists in the refrigerator refrigeration cycle loop in the form of liquid phase, gas phase or gas-liquid two-phase form. The refrigerant used in the refrigerator refrigeration cycle system in this embodiment is R600a refrigerant.
[0031] This embodiment proposes a metal corrosion electrochemical testing system for a refrigerator refrigeration system, which can measure the corrosion electrochemical information of refrigeration parts at different positions of the refrigerator refrigeration system in a working state. The metal corrosion electrochemical testing system includes an electrochemical testing device 13 and a self-assembled electrode testing device, such as Figure 2 and Figure 3 As shown, the self-assembled electrode testing device is connected to the test pipeline of the refrigerator refrigeration system, a reference electrode 9 and an auxiliary electrode 10 are arranged in the self-assembled electrode testing device, a test electrode 8 is arranged in the refrigerator refrigeration system, and the reference electrode 9, the auxiliary electrode 10 and the test electrode 8 are respectively connected to the electrochemical testing device.
[0032] The self-assembled electrode testing device includes a front test piece and a rear test piece, which are symmetrically arranged and made of high-temperature resistant insulating plastic. In this embodiment, the front test piece and the rear test piece are made of polytetrafluoroethylene, which has excellent high-temperature resistance and corrosion resistance as well as good insulation. It can be safely used at a high temperature of 260°C and will not melt or deform during use.
[0033] In this embodiment, the structures of the front test piece and the rear test piece both include a locking piece 7-1 and a sleeve 7-2. The locking piece is a truncated cone-shaped structure with a hollow interior. One end of the locking piece 7-1 is connected to the standard pipe 6, and the other end is connected to the sleeve 7-2. A sleeve groove is provided in the sleeve. Figure 4 As shown, the locking piece and the sleeve are interference fit, and the two are tightened by sleeve connection and rotation, which is simple to operate and easy to install; at the same time, in order to ensure the sealing between the locking piece and the sleeve, a sealing ring 14 is also provided between the locking piece and the sleeve. The front test piece and the rear test piece are connected by bolts 11, and a plurality of bolt holes are fixed at equal intervals on the outer wall of the sleeve of the front test piece, and a plurality of bolt holes are provided on the outer wall of the sleeve of the rear test piece correspondingly. The bolts 11 are passed through the corresponding bolt holes on the front test piece and the rear test piece in turn and then fixed by nuts 12, so as to fix the front test piece and the rear test piece. A reference electrode and an auxiliary electrode are provided on the outer wall of the sleeve of the front test piece, and the test electrodes in the test pipeline of the refrigerator refrigeration system are placed in the sleeve grooves of the front test piece and the rear test piece, and the reference electrode, the auxiliary electrode and the test electrode are respectively connected to the electrochemical test device through pipelines.
[0034] In this embodiment, a reference electrode and an auxiliary electrode are arranged on the outer wall of the sleeve of the front test piece, the reference electrode is set to be an Ag / AgCl electrode, the auxiliary electrode is a titanium-based precious metal oxide anode, and the test electrodes in the refrigerator refrigeration system test pipeline are placed in the sleeve grooves of the front test piece and the rear test piece. The test electrodes are metal pipelines in the evaporator, condenser or capillary of the refrigerator refrigeration system. Silicone gaskets 15 are provided at both ends of the test electrode to seal with the sleeve, and the reference electrode, auxiliary electrode and test electrode are respectively connected to the electrochemical testing device through wires.
[0035] This embodiment also proposes a metal corrosion electrochemical testing method for a refrigerator refrigeration system, using the above metal corrosion electrochemical testing system, specifically including the following steps:
[0036] Step 1: According to the pipe size of the refrigerator refrigeration cycle loop, a self-assembled electrode test device in a metal corrosion electrochemical test system is manufactured and assembled.
[0037] Step 2, select a test pipe on the refrigerator refrigeration cycle loop, cut the test pipe and connect it to the self-assembled electrode test device, sleeve the locking piece on the standard pipe, and sleeve the locking piece on the sleeve, so that the locking piece and the sleeve are sealed, place the test pipe in the sleeve groove, place silicone gaskets at both ends of the test pipe and seal it with the sleeve, and then fix the front test piece and the rear test piece of the self-assembled electrode test device with long bolts to complete the installation of the self-assembled electrode test device. After the installation is completed, the test electrode, reference electrode and auxiliary electrode in the metal corrosion electrochemical test system are all in the same working environment, and the reference electrode, auxiliary electrode and test electrode are respectively connected to the electrochemical test device through wires to perform metal corrosion electrochemical testing of the refrigerator refrigeration system.
[0038] Step 3, turning on the refrigerator refrigeration system, so that the refrigerator refrigeration system is in working state, and the reference electrode, the auxiliary electrode and the test electrode are all in a refrigeration working environment.
[0039] Step 4: Use the metal corrosion electrochemical test system in the refrigeration system environment to characterize the electrochemical information distribution and obtain the corrosion potential and electrochemical AC impedance information. When the open circuit potential is within 300s and the fluctuation does not exceed 5mV, record the corrosion potential and start measuring the electrochemical AC impedance. The AC excitation signal amplitude is 10mV and the frequency range is 100kHz~0.01Hz.
[0040] Step 5, adjust the operating temperature of the refrigerator refrigeration system, set multiple working environment temperatures, and repeat the above test at different working environment temperatures.
[0041] In this embodiment, the operating temperatures of the refrigerator refrigeration system are set to 16°C, 32°C and 43°C, respectively. By conducting metal corrosion electrochemical tests on the refrigerator refrigeration system under different operating temperature conditions, the electrochemical spectra at different times are obtained and compared, so as to determine the change pattern of the electrochemical information of the corrosion process with time and space, and obtain the influence of environmental conditions, time, etc. on the corrosion behavior of the material.
[0042] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A metal corrosion electrochemical testing system for refrigerator refrigeration system, characterized in that: It includes an electrochemical testing device and a self-assembled electrode testing device. The self-assembled electrode testing device is connected to a testing pipeline of a refrigerator refrigeration system. A reference electrode and an auxiliary electrode are arranged in the self-assembled electrode testing device. A testing electrode is arranged in the refrigerator refrigeration system. The reference electrode, the auxiliary electrode and the testing electrode are respectively connected to the electrochemical testing device.
2. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 1, characterized in that: The self-assembled electrode testing device comprises a front test piece and a rear test piece, and the front test piece and the rear test piece are connected by bolts.
3. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 2, characterized in that: The front test piece and the rear test piece are symmetrically arranged, and both the front test piece and the rear test piece are provided with a locking piece and a sleeve, wherein the locking piece is a truncated cone-shaped structure with a hollow interior, one end of the locking piece is connected to the standard pipeline, and the other end is connected to the sleeve, and a sleeve groove is provided in the sleeve; A reference electrode and an auxiliary electrode are arranged on the outer wall of the sleeve of the front test piece, and the test electrodes in the refrigerator refrigeration system test pipeline are placed in the sleeve grooves of the front test piece and the rear test piece. The reference electrode, the auxiliary electrode and the test electrode are respectively connected to the electrochemical testing device through wires.
4. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 3, characterized in that: A plurality of bolt holes are fixed at equal intervals on the outer wall of the sleeve of the front test piece, and a plurality of bolt holes are correspondingly arranged on the outer wall of the sleeve of the rear test piece. The bolts are passed through the bolt holes and fixed with nuts to fix the front test piece and the rear test piece.
5. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 3, characterized in that: The locking piece and the sleeve are interference fit.
6. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 5, characterized in that: A sealing ring is arranged between the locking piece and the sleeve.
7. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 1, characterized in that: The reference electrode is set as an Ag / AgCl electrode, and the auxiliary electrode is a titanium-based noble metal oxide anode.
8. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 1, characterized in that: The test electrode is a metal pipeline arranged in the evaporator, condenser or capillary of the refrigerator refrigeration system; silicone gaskets are sleeved at both ends of the test electrode to seal and connect the test electrode with the sleeve.
9. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 3, characterized in that: The front test piece and the rear test piece are both polytetrafluoroethylene injection molded parts.
10. The metal corrosion electrochemical testing system for refrigerator refrigeration system according to claim 3, characterized in that: The inner diameter of the sleeve is larger than the inner diameter of the test electrode and smaller than the inner diameter of the test pipe. The inner diameter of the top end of the locking piece is smaller than the inner diameter of the bottom end. The inner diameter of the tail end of the locking piece is equal to the inner diameter of the sleeve and smaller than the inner diameter of the test pipe.