Monitoring device, probe, corrosion rate monitoring method and air conditioner testing system

Abstract

The invention discloses a monitoring device, a probe, a corrosion rate monitoring method and an air conditioner testing system, and relates to the technical field of corrosion monitoring. The monitoring device comprises a data processor and at least one probe, the probe comprises an insulating substrate, a first comb tooth electrode and a second comb tooth electrode, comb teeth of the first comb tooth electrode and comb teeth of the second comb tooth electrode are arranged in a staggered mode and form tooth seams, and the width of the tooth seams is smaller than or equal to 0.1 mm. According to the invention, the comb tooth electrode structure is adopted and the tooth seam width of the comb tooth electrode is strictly limited, so that the measurement precision is obviously improved; according to the monitoring device, a multi-channel independent acquisition circuit is adopted, the data acquisition efficiency is improved, the multi-point monitoring requirement is met, and the dynamic real-time measurement precision is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of corrosion monitoring, and particularly relates to a monitoring device, a probe, a corrosion rate monitoring method and an air conditioner test system. BACKGROUND

[0002] Corrosion monitoring technology mainly realizes real-time monitoring of corrosion state through an electrochemical sensor. When applied to a household air conditioner outdoor unit, it is beneficial to intelligently monitor the corrosion rate and corrosion condition of the air conditioner outdoor unit under different weather conditions and climate conditions, so as to facilitate targeted corrosion prevention design for different climate conditions. In a corrosion monitoring system of the related art, electrode structure design, signal acquisition and transmission system are key factors affecting monitoring effect. In the related art, a comb electrode is used as the main structure of the electrode, but the structure of the comb electrode has defects leading to low measurement accuracy. In another related art, a single-channel acquisition mode is generally used in a corrosion monitoring system, and in a dynamic interference environment, potential test accuracy is insufficient, signal acquisition efficiency is low, and the demand for simultaneous monitoring of multiple monitoring points cannot be met. In addition, the corrosion monitoring system in the related art lacks effective remote monitoring capability and cannot realize real-time data transmission and analysis. SUMMARY

[0003] The main purpose of the present application is to develop an air conditioner test system with higher measurement accuracy, capable of meeting the requirements of simultaneous multi-point monitoring, remote monitoring and real-time monitoring of corrosion conditions.

[0004] The technical solution in the present application designs a monitoring device, which comprises a data processor and at least one probe. The probe comprises an insulating substrate, a first comb electrode arranged on one surface of the insulating substrate, and a second comb electrode arranged on the same surface of the insulating substrate as the first comb electrode. The teeth of the first comb electrode and the teeth of the second comb electrode are staggered and form a tooth gap, and the width of the tooth gap is less than or equal to 0.1 mm and greater than 0 mm.

[0005] In an embodiment, the length of the teeth of the first comb electrode is greater than or equal to 2 mm, the width of the teeth of the first comb electrode is greater than or equal to 0.2 mm, the spacing between adjacent teeth of the first comb electrode is less than or equal to 0.1 mm and greater than 0 mm, and the first comb electrode comprises at least two groups of teeth.

[0006] In an embodiment, the length of the teeth of the second comb electrode is greater than or equal to 2 mm, the width of the teeth of the second comb electrode is greater than or equal to 0.2 mm, and the spacing between the teeth of the second comb electrode is less than or equal to 0.1 mm and greater than 0 mm; and the second comb electrode comprises at least two groups of teeth.

[0007] In an embodiment, the thickness of the first comb electrode is less than or equal to 20 mm; and / or, the thickness of the second comb electrode is less than or equal to 20 mm; and / or, the thickness of the insulating substrate is less than or equal to 50 mm.

[0008] In an embodiment, the comb shape of the first comb electrode is selected from any one of a square, a trapezoid, a triangle, a wave, a sector, and an arc; the comb shape of the second comb electrode is intermeshed with the comb shape of the first comb electrode, and the comb shape of the second comb electrode is selected from any one of a square, a trapezoid, a triangle, a wave, a sector, and an arc.

[0009] In an embodiment, the shape of the probe is consistent with the shape of the insulating substrate, and the shape of the insulating substrate is selected from a column, including a cylinder or a prism.

[0010] In an embodiment, the first comb electrode and the second comb electrode are made of the same material; the material of the first comb electrode and the second comb electrode is selected from any one of copper and copper alloy, aluminum and aluminum alloy, and stainless steel, or the surface of the first comb electrode is plated with any one of copper and copper alloy, aluminum and aluminum alloy, and stainless steel.

[0011] In an embodiment, the monitoring device includes at least four probes.

[0012] The present application also provides a probe, which includes an insulating substrate, a first comb electrode arranged on a surface of the insulating substrate, and a second comb electrode arranged on the same surface of the insulating substrate on which the first comb electrode is arranged; wherein the combs of the first comb electrode and the combs of the second comb electrode are staggered and form tooth gaps, and the width of the tooth gaps is less than or equal to 0.1 mm and greater than 0 mm.

[0013] The present application also provides a corrosion rate monitoring method using the monitoring device, which includes the following steps: The data processor receives the electrochemical signals fed back by the probe and processes electrochemical impedance data; and forms corrosion state information of the outdoor unit of the air conditioner according to the electrochemical impedance data.

[0014] In an embodiment, the corrosion rate monitoring method of the monitoring device specifically includes the following steps: S1, the probe contacts the corrosion information of the air conditioner and feeds back electrochemical signals; S2, the electrochemical signals are processed by the data processor to obtain electrochemical impedance data, and are transmitted to a cloud server; S3, the cloud server forms corrosion state information of the outdoor unit of the air conditioner according to the electrochemical impedance data.

[0015] The application further provides an air conditioner testing system, which comprises: an air conditioner, and a monitoring device, wherein a probe in the monitoring device is installed in an operation environment of a component to be tested of the air conditioner.

[0016] In an embodiment, the component to be tested comprises an outdoor unit heat exchanger of the air conditioner.

[0017] In an embodiment, an electrode working surface of the probe is arranged towards an air inlet direction of the outdoor unit heat exchanger.

[0018] In an embodiment, the data processor is installed outside a body of an outdoor unit of the air conditioner, and the probe is installed inside the body; and the data processor and the probe are electrically connected through an electrode lead wire.

[0019] The monitoring device and the monitoring method of the application significantly improve the measurement accuracy by adopting the comb electrode structure and strictly limiting the tooth gap width of the comb electrode; the application adopts the multi-channel independent acquisition circuit to improve the data acquisition efficiency by more than 400%, which can meet the multi-point monitoring requirement; the dynamic real-time measurement accuracy of the monitoring device of the application is high, and the measurement error is only 0.12%; in addition, the monitoring device of the application also integrates the 4G / WiFi dual-mode communication and data caching mechanism, realizes the remote monitoring and data visualization, and is convenient for real-time monitoring of the corrosion condition. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the 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 constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0021] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the probe of the application; Figure 2 FIG. 2 is a structural schematic diagram of another embodiment of the probe of the application; Figure 3 FIG. 3 is a structural schematic diagram of another embodiment of the probe of the application; Figure 4 FIG. 4 is a sectional view of an embodiment of the air conditioner testing system of the application; Figure 5 FIG. 5 is a comparison diagram of the impedance modulus-frequency curves of the same air conditioner outdoor unit measured by the embodiment 1 and a foreign instrument under the same humid environment at the same time; Figure 6Fig. 4 is a comparison chart of the phase angle-frequency curves measured by the foreign instrument and the instrument of the present application under the same dry environment at the same time on the same air conditioner outdoor unit; Figure 7 Fig. 5 is a comparison chart of the impedance modulus-frequency curves measured by the foreign instrument and the instrument of the present application under the same dry environment at the same time on the same air conditioner outdoor unit; Figure 8 Fig. 6 is a comparison chart of the phase angle-frequency curves measured by the foreign instrument and the instrument of the present application under the same dry environment at the same time on the same air conditioner outdoor unit; Reference numerals: 1, probe; 11, first comb electrode; 12, second comb electrode; 13, tooth gap; 14, insulating substrate; 15, electrode lead; 2, data processor; 3, air conditioner outdoor unit; 31, air inlet of air conditioner outdoor unit; 4, clamp; The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0023] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0024] In addition, if the embodiments of the present application involve the description of “first”, “second” and the like, the description of “first”, “second” and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel schemes are included, taking “A and / or B” as an example, including A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0025] The technical problem addressed in this application is that in corrosion monitoring systems of related technologies, electrode structure design and signal acquisition and transmission systems are key factors affecting monitoring effectiveness. Related technologies use comb-tooth electrodes as the main electrode structure, but structural flaws in comb-tooth electrodes lead to low measurement accuracy. In another related technology, corrosion monitoring systems generally adopt a single-channel acquisition mode, and under dynamic interference environments, potential testing accuracy is insufficient, signal acquisition efficiency is low, and it is difficult to meet the needs of simultaneous monitoring at multiple points. Furthermore, some corrosion monitoring systems in related technologies lack effective remote monitoring capabilities, making real-time data transmission and analysis impossible.

[0026] To address the aforementioned technical problems, this invention proposes a monitoring device, such as... Figure 4 As shown, the monitoring device includes a data processor 2 and at least one probe 1. Figure 1 As shown, the probe 1 includes an insulating substrate 14; and a first comb electrode 11 and a second comb electrode 12 distributed on the same surface of the insulating substrate 14. The comb teeth of the first comb electrode 11 and the comb teeth of the second comb electrode 12 are arranged alternately to form a tooth gap 13. The width of the tooth gap 13 is less than or equal to 0.1 mm and greater than 0 mm. The first comb electrode 11 and the second comb electrode 12 are electrically connected to the data processor 2 through electrode leads 15, respectively.

[0027] It is understandable that the width of the tooth gap 13 refers to the minimum distance between adjacent teeth of the first comb electrode 11 and the second comb electrode 12 in the same group of comb electrodes.

[0028] It should be noted that, in the initial state, the teeth of the first comb electrode 11 and the second comb electrode 12 in the probe of the present invention are arranged alternately and do not directly contact each other. The first comb electrode 11 and the second comb electrode 12 are separated by an insulating substrate 14, such as ceramic, glass, organic polymer, or other materials, thereby forming a tooth gap 13. Therefore, in the initial state, the circuit inside the probe is not conductive, and the impedance between the first comb electrode 11 and the second comb electrode 12 is extremely high, approaching infinity. When the probe is exposed to a corrosive environment such as humid air or electrolyte solution, corrosion products will continuously be generated on the exposed surfaces of the first comb electrode 11 and the second comb electrode 12. The corrosion products will gradually accumulate on the surface of the metal comb electrode. When there are enough corrosion products, they will form a "corrosion product bridge" in the tiny gap between the teeth of the two comb electrodes, connecting the originally insulated tooth gap 13. The impedance between the teeth will be significantly reduced. By analyzing the monitored impedance spectrum, i.e., the relationship between impedance value and frequency, the nature of the corrosion products, the formation rate, and the type of corrosion can be evaluated.

[0029] It is also noted that the smaller the gap 13 between the first comb electrode 11 and the second comb electrode 12, the more sensitive the probe is to the initial stage of corrosion, and the probe can detect the signal of the beginning of corrosion before the material has a significant thickness loss. In atmospheric corrosion, the amount of corrosive substance deposited is usually small, and the small gap structure can capture these trace deposits and amplify and detect the corrosion effect through impedance changes.

[0030] In a preferred embodiment, the width of the gap 13 can be any one of 0.01 mm, 0.02 mm, 0.03 mm, 0.05 mm, 0.1 mm.

[0031] In an embodiment, the length of the comb teeth of the first comb electrode 11 is greater than or equal to 2 mm, the width of the comb teeth of the first comb electrode 11 is greater than or equal to 0.2 mm, the distance between adjacent comb teeth of the first comb electrode 11 is less than or equal to 0.1 mm and greater than 0 mm, and the first comb electrode 11 includes at least two groups of comb teeth.

[0032] It is noted that the length of the comb teeth of the comb electrode refers to the effective distance between the root and the tip end of the comb teeth of the comb electrode; the width of the comb teeth of the comb electrode refers to the dimension of the comb teeth in the direction perpendicular to the length of the comb teeth.

[0033] In a preferred embodiment, the first comb electrode 11 is a rectangular comb tooth, the length of the comb teeth is 8 mm, the width of the comb teeth of the first comb electrode 11 is 2 mm, the distance between adjacent comb teeth of the first comb electrode 11 is 0.1 mm, and the first comb electrode 11 includes 5 groups of comb teeth.

[0034] In another embodiment, the length of the comb teeth of the second comb electrode 12 is greater than or equal to 2 mm, the width of the comb teeth of the second comb electrode 12 is greater than or equal to 0.2 mm, the distance between adjacent comb teeth of the second comb electrode 12 is less than or equal to 0.1 mm and greater than 0 mm, and the second comb electrode 12 includes at least two groups of comb teeth.

[0035] In another preferred embodiment, the length of the comb teeth of the second comb electrode 12 is 8 mm, the width of the comb teeth of the second comb electrode 12 is 2 mm, the distance between adjacent comb teeth of the second comb electrode 12 is 0.1 mm, and the second comb electrode 12 includes 5 groups of comb teeth.

[0036] In an embodiment, the thickness of the first comb electrode 11 is less than or equal to 20 mm; and / or, the thickness of the second comb electrode 12 is less than or equal to 20 mm; and / or, the thickness of the insulating substrate 14 is less than or equal to 50 mm.

[0037] In a preferred embodiment, the thickness of the first comb electrode 11 is 3 mm; the thickness of the second comb electrode 12 is 3 mm; and the thickness of the insulating substrate 14 is 5 mm.

[0038] It should be noted that the first comb electrode 11 and the second comb electrode 12 are two meshing electrodes, and their physical parameters should generally be kept consistent to ensure the accuracy of the measurement. Limiting the thickness of the insulating substrate helps to prevent the electric field environment of the air conditioner from interfering with or affecting the comb electrode, which helps to improve the spatial resolution and independence of the measurement, and allows for a more focused monitoring of the corrosion process occurring on the electrode surface without being affected by the environment behind it.

[0039] In one embodiment, the shape of the comb teeth of the first comb electrode 11 is selected from any one of square, trapezoidal, triangular, wavy, fan-shaped, and bow-shaped; the shape of the comb teeth of the second comb electrode 12 meshes with the shape of the comb teeth of the first comb electrode 11, and the shape of the comb teeth of the second comb electrode 12 is selected from any one of square, trapezoidal, triangular, wavy, fan-shaped, and bow-shaped.

[0040] In one embodiment, such as Figure 1 As shown, the comb teeth of the first comb electrode 11 are square, and the comb teeth of the second comb electrode 12 mesh with the comb teeth of the first comb electrode, and the comb teeth of the second comb electrode are also square.

[0041] In one embodiment, such as Figure 2 As shown, the comb teeth of the first comb electrode 11 are triangular in shape, and the comb teeth of the second comb electrode 12 mesh with the comb teeth of the first comb electrode 11, and the comb teeth of the second comb electrode 12 are also triangular in shape.

[0042] In one embodiment, such as Figure 3 As shown, the comb teeth of the first comb electrode 11 are wavy, and the comb teeth of the second comb electrode 12 are different from those of the first comb electrode 11 but are interlocked, and are wavy in another shape.

[0043] In one embodiment, the probe 1 has a shape consistent with that of the insulating substrate 14, which is selected from a cylindrical shape, including a cylinder or a prism. It is understood that the probe embeds the electrode connected to the electrode lead 15 into the insulating substrate 14 while keeping the electrode surface exposed to the outside environment.

[0044] In one embodiment, the first comb electrode 11 and the second comb electrode 12 are made of the same material; the material of the first comb electrode 11 and the second comb electrode 12 is selected from any one of copper and copper alloys, aluminum and aluminum alloys, and stainless steel, or the surfaces of the first comb electrode 11 and the second comb electrode 12 are plated with any one of copper and copper alloys, aluminum and aluminum alloys, and stainless steel.

[0045] It can be understood that the probe adopts two comb electrodes with the same material, so as to ensure that the responses of the two to environmental factors such as temperature, humidity and stress are synchronous and consistent, and the instrument can better eliminate common-mode interference and improve the signal-to-noise ratio through differential measurement or average processing.

[0046] In a specific embodiment, the monitoring device of the present application specifically comprises: At least one probe for receiving an excitation signal and generating a corresponding electrochemical signal.

[0047] The data processor comprises a probe electrochemical signal acquisition, temporary storage and transmission device.

[0048] The probe electrochemical signal acquisition, temporary storage and transmission device is integrated with: a probe electrochemical signal acquisition module for applying an excitation signal, receiving and measuring the electrochemical signal generated by the probe, and calculating and analyzing to obtain electrochemical impedance spectrum data; a data temporary storage module for original data storage and caching of the electrochemical impedance spectrum data; and a data transmission module for sending the electrochemical impedance spectrum data to a cloud server and accepting remote instructions from the cloud server.

[0049] In an embodiment, the data processor can directly analyze the electrochemical impedance spectrum data to obtain corrosion state information; in another embodiment, the data processor can also send the electrochemical impedance spectrum data to a cloud server, and the cloud server analyzes the electrochemical impedance spectrum data to obtain corrosion state information and issues remote instructions to the data processor.

[0050] In an embodiment, the probe electrochemical signal acquisition module comprises: a signal excitation unit for applying a sinusoidal alternating excitation signal to the loop of the first comb electrode and the second comb electrode; and a signal receiving unit for receiving an electrochemical response signal generated by the loop of the first comb electrode and the second comb electrode based on the sinusoidal alternating excitation signal.

[0051] In an embodiment, the probe electrochemical signal acquisition module is further integrated with a multi-channel independent acquisition circuit, and the electrochemical response signal received by the signal receiving unit enters the multi-channel independent acquisition circuit, which is provided with a mutually independent signal conditioning circuit including an operational amplifier and an analog-to-digital converter corresponding to each probe.

[0052] In a specific embodiment, the operational amplifier comprises: a preamplification module for amplifying the electrochemical response signal received by the signal receiving unit so that the useful signal is significantly higher than the system noise floor; a filtering module for screening out signals with a frequency range of 0.01 Hz-100 kHz after the preamplification module as the electrochemical signal; and a gain control module for dynamically adjusting the electrochemical signal after the filtering module to the best range of the analog-to-digital converter and obtaining more accurate digitized results.

[0053] In a specific embodiment, an analog-to-digital converter is used to quantize the electrochemical signal processed by the operational amplifier into a digital signal.

[0054] In an embodiment, the probe electrochemical signal acquisition module is further integrated with a digital signal processor, which is used to calculate and analyze the digital signal quantized by the analog-to-digital converter through a Fourier transform algorithm, to obtain impedance data of the equivalent circuit between the first and second comb electrodes in the probe, and to analyze the impedance data at multiple frequency points to obtain electrochemical impedance spectrum data.

[0055] It should be noted that the digital signal data processor measures the impedance data corresponding to a single frequency point in the range from high frequency 100 kHz to low frequency 0.01 Hz at the same monitoring point at the same time, and further obtains a complete set of electrochemical impedance spectrum data through frequency scanning; then the electrochemical impedance spectrum data of different monitoring points at the same time are integrated to calculate the polarization resistance of different monitoring points, and further to calculate the corrosion rate of different monitoring points, so as to help researchers master the overall corrosion condition of the air conditioner outdoor unit.

[0056] In an embodiment, the data transmission module is integrated with a dual-mode communication module of a 4G communication module and a WiFi module; the 4G communication module supports multiple frequency bands to ensure stable connection of data network and stable transmission of electrochemical spectrum data in various complex environments; the WiFi module supports 2.4 GHz and 5 GHz dual bands, and is compatible with 802.11a / b / g / n / ac standards.

[0057] In an embodiment, the data storage module is built-in with a flash memory chip to provide data caching space, which can store 20,000 complete measurement records.

[0058] The application further provides an electrochemical corrosion rate monitoring method, which comprises the following steps: The data processor receives the electrochemical signal fed back by the probe and processes the electrochemical impedance data; and forms the corrosion state information of the air conditioner outdoor unit according to the electrochemical impedance data.

[0059] In a specific embodiment, the electrochemical corrosion rate monitoring method comprises the following steps: S1, the probe contacts the corrosion information of the air conditioner and feeds back the electrochemical signal; S2, the electrochemical signal is processed by the data processor to obtain the electrochemical impedance data, and is transmitted to the cloud server; S3, the cloud server forms the corrosion state information of the air conditioner outdoor unit according to the electrochemical impedance data.

[0060] Specifically, in step S1, the probe and the data processor are respectively installed at designated positions of the outdoor unit of the air conditioner, the data processor is electrically connected with the electrode lead of the probe, the power supply is connected, and the monitoring device is synchronously operated with the air conditioner.

[0061] In step S2, the probe electrochemical signal acquisition, temporary storage and transmission device applies an excitation signal to the probe through the probe electrochemical signal acquisition module, and receives the electrochemical response signal generated by the probe; the electrochemical response signal is converted into a digital signal through the probe electrochemical signal acquisition module, and electrochemical impedance spectrum data is obtained through calculation and analysis.

[0062] When the network is normally connected, the electrochemical impedance spectrum data is continuously transmitted to the cloud server through the data transmission module; when the network is interrupted, the electrochemical impedance spectrum data is automatically saved in the data temporary storage module, and after the network is restored, the electrochemical impedance spectrum data is automatically transmitted to the data transmission module and transmitted to the cloud server; the cloud server can calculate and analyze the electrochemical impedance spectrum data, continuously monitor the electrochemical impedance spectrum data of the probe of the outdoor unit of the air conditioner, and calculate the corrosion state information of the material.

[0063] The corrosion state information includes information representing the real-time corrosion state of the component to be measured at one or more time points and / or information representing the corrosion state of the component to be measured at one time period or different air conditioner operation time periods. Further, the corrosion state information includes corrosion behavior information, which can include whether corrosion occurs, the time when corrosion occurs, the time when the corrosion rate is greater than a preset rate, and the like.

[0064] In a preferred embodiment, the digital signal data processor can synchronously calculate and analyze multiple digital signals from different signal conditioning circuits and obtain electrochemical impedance spectrum data of different monitoring points at the same time, so as to realize synchronous monitoring of the corrosion conditions of multiple monitoring points of the outdoor unit of the air conditioner.

[0065] In a preferred embodiment, the monitoring device in the embodiment includes four probes, and four independent acquisition circuits are correspondingly arranged in the probe electrochemical signal acquisition, temporary storage and transmission device, each probe is configured with an independent electrochemical signal transmission channel, and each channel is equipped with an independent signal conditioning circuit including a preamplifier, a filter and a gain control module, so as to ensure the independence and accuracy of signal acquisition of each channel. In addition, the signal conditioning circuit adopts low-noise elements and anti-interference measures, so that the system can maintain good signal quality in the low frequency band of 0.01 Hz to the high frequency band of 100 kHz, and synchronous monitoring of the corrosion conditions of multiple monitoring points of the outdoor unit of the air conditioner is realized.

[0066] The application also provides an air conditioner testing system, which comprises an air conditioner and a monitoring device, wherein the probe of the monitoring device is installed in the operating environment of the component to be measured of the air conditioner.

[0067] In an embodiment, the component to be tested comprises an outdoor unit heat exchanger of an air conditioner. In a specific embodiment, the electrode working surface of the probe is arranged close to the surface of the condenser pipe and / or the fin of the heat exchanger. It should be noted that the electrode working surface of the probe in the present embodiment refers to the part of the first comb-shaped electrode and the second comb-shaped electrode exposed to the test environment.

[0068] In a specific embodiment, the electrode working surface of the probe is arranged towards the air inlet direction of the outdoor unit heat exchanger. When the airflow flows through the probe under the driving action of the fan, the impurities such as condensed water or corrosion products on the electrode working surface of the probe can be blown off, which is conducive to improving the response sensitivity of the probe.

[0069] In a specific embodiment, as shown in Figure 4 The monitoring device in the present embodiment is arranged as follows: the clamp 4 is fixed to the side plate at the air inlet of the outdoor unit 3 of the air conditioner, at least one probe 1 is fixedly installed in the clamp 4, and the electrode working surface of the probe 1 is arranged towards the air inlet 31 of the outdoor unit of the air conditioner; the data processor is fixedly installed at the top cover of the outdoor unit 3 of the air conditioner, the four probes 1 are electrically connected to the data processor 2 through the electrode lead 15, the data processor 2 is electrically connected to the outdoor unit 3 of the air conditioner, and the monitoring device operates synchronously with the air conditioner to monitor the data and transmit the data to the cloud server.

[0070] In a specific embodiment, the clamp 4 can also be fixed to the refrigerant pipe of the heat exchanger, at least one probe 1 is fixedly installed in the clamp 4, and the electrode working surface of the probe 1 is arranged towards the air inlet direction of the heat exchanger.

[0071] It should be noted that the electrode working surface of the probe 1 is arranged towards the air inlet direction of the heat exchanger, and further, the electrode working surface of the probe 1 is kept in a vertical state, which can further avoid the accumulation of condensed water, dust or corrosion products on the electrode working surface to affect the collection of corrosion information.

[0072] The present application is further described below through specific embodiments: Embodiment 1 The probe 1 used in the monitoring device in Embodiment 1 is shown in Figure 1 The probe 1 used in the monitoring device in Embodiment 1 is shown in

[0073] The material of the insulating substrate is polyimide, the shape of the teeth of the first comb-shaped electrode 11 and the second comb-shaped electrode 12 is square, and the material of the teeth is pure copper.

[0074] The comb tooth length of the first comb tooth electrode 11 and the second comb tooth electrode 12 is 50 mm, the comb tooth width of the first comb tooth electrode 11 and the second comb tooth electrode 12 is 0.54 mm, and the thickness of the first comb tooth electrode 11 and the second comb tooth electrode 12 is 10 mm; the first comb tooth electrode 11 and the second comb tooth electrode 12 include 10 groups of comb teeth; and the thickness of the insulating substrate is 20 mm.

[0075] The surface area of the electrode working surface of the probe 1 in Embodiment 1 is about 12 cm 2 .

[0076] The monitoring device in Embodiment 1 comprises: four probes and one data processor. The four probes are respectively connected to the data processor through four groups of electrode leads. The data processor comprises a probe electrochemical signal acquisition, temporary storage and transmission device, which is integrated with a probe electrochemical signal acquisition module, a data temporary storage module and a data transmission module.

[0077] The probe electrochemical signal acquisition module is integrated with a signal excitation unit, a signal receiving unit, a multi-channel independent acquisition circuit and a digital signal data processor; the data temporary storage module is internally provided with a flash memory chip; and the data transmission module is integrated with a dual-mode communication module of a 4G communication module and a WiFi module.

[0078] The multi-channel independent acquisition circuit comprises a plurality of independent signal conditioning circuits, which are sequentially provided with an operational amplifier and an analog-to-digital converter, and the operational amplifier is sequentially provided with a preamplification module, a filtering module and a gain control module.

[0079] As shown in Figure 4 the four probes 1 in the monitoring device in Embodiment 1 are installed and fixed in the clamp 4, the clamp 4 is fixed on the upper part of the side plate at the left air inlet of the air conditioner outdoor unit 3 of the split air conditioner, and the bottom surface of the cylindrical probe is fitted with the inner wall of the air conditioner outdoor unit 3; the probe electrochemical signal acquisition, temporary storage and transmission device is installed and fixed at the left side position of the top cover of the air conditioner outdoor unit 3, and the four probes 1 are respectively connected to the probe electrochemical signal acquisition, temporary storage and transmission device through electrode leads 15. The monitoring device operates synchronously with the air conditioner, synchronously monitors the data, and transmits the data to the cloud server.

[0080] The air conditioner outdoor unit corrosion rate monitoring method in Embodiment 1 comprises the following steps: S1, installing the probe and the probe electrochemical signal acquisition, temporary storage and transmission device at the specified positions of the air conditioner outdoor unit respectively, connecting the electrode leads of the probe electrochemical signal acquisition, temporary storage and transmission device and the probe, connecting the power supply, and making the monitoring device operate synchronously with the air conditioner; S2, the probe electrochemical signal acquisition module applies an excitation signal to the probe and receives the electrochemical response signal generated by the probe; S3, the electrochemical response signal is converted into a digital signal via the probe electrochemical signal acquisition module and electrochemical impedance spectroscopy data is obtained through calculation and analysis; S4, when the network is normally connected, the electrochemical impedance spectroscopy data is continuously transmitted to the terminal via the data transmission module; when the network is interrupted, the electrochemical impedance spectroscopy data is automatically saved in the data temporary storage module, and after the network is restored, the electrochemical impedance spectroscopy data is automatically transmitted to the data transmission module and transmitted to the terminal; S5, the electrochemical impedance spectroscopy data is measured and calculated using the terminal, the electrochemical impedance spectroscopy data of the air conditioner outdoor unit probe is monitored without interruption, and the corrosion rate of the material is calculated based on the high and low frequency impedance values obtained by monitoring, so as to understand the material corrosion of the air conditioner outdoor unit in different time periods.

[0081] The static resistance test was performed on the same air conditioner outdoor unit using the monitoring device in Example 1 and the foreign instrument GAMRY 600 at the same time, and the results are shown in Table 1; the dynamic corrosion test was performed in a humid environment (water content 20%) and a dry environment (water content 0%) respectively, and the results are shown in Figures 5-8 .

[0082] Table 1

[0083] Through analysis of Table 1, it can be seen that the measurement error and average deviation of the monitoring device in Example 1 are extremely small compared with the commercially available monitoring device GAMRY 600, which proves that the core measurement accuracy and stability have reached the international level, and the difference is extremely small, which proves that it has the ability of high-precision measurement.

[0084] Figures 5-8 In the figure, the blue curve is the curve measured by the monitoring device in Example 1, and the red curve is the curve measured by the corrosion monitoring device with model number GAMRY 600. Through analysis of Figure 5 and Figure 6 , it can be seen that the measurement stability and accuracy of the monitoring device in Example 1 and GAMRY 600 in the humid environment with water content of 20% are close; through analysis of Figure 7 and Figure 8 , it can be seen that in the dry environment, GAMRY 600 frequently appears irregular protrusions on the curve, while the monitoring device in Example 1 is a normal curve, so it can be seen that the monitoring device in the application has higher stability in the dry environment.

[0085] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, within the technical concept of the present application, and based on the content of the present application and the accompanying drawings, are included in the patent protection scope of the present application.

Claims

1. A monitoring device, characterized in that, The monitoring device includes a data processor and at least one probe; the probe includes: Insulating substrate; A first comb-tooth electrode is disposed on one surface of the insulating substrate; The second comb electrode is disposed on the same surface of the insulating substrate on which the first comb electrode is disposed; The teeth of the first comb electrode and the teeth of the second comb electrode are arranged alternately to form a tooth gap, and the width of the tooth gap is less than or equal to 0.1 mm and greater than 0 mm.

2. The monitoring device as described in claim 1, characterized in that, The length of the comb teeth of the first comb electrode is greater than or equal to 2 mm, the width of the comb teeth of the first comb electrode is greater than or equal to 0.2 mm, the spacing between adjacent comb teeth of the first comb electrode is less than or equal to 0.1 mm and greater than 0 mm, and the first comb electrode includes at least two sets of comb teeth. And / or, the length of the comb teeth of the second comb electrode is greater than or equal to 2 mm, the width of the comb teeth of the second comb electrode is greater than or equal to 0.2 mm, and the spacing of the comb teeth of the second comb electrode is less than or equal to 0.1 mm and greater than 0 mm; the second comb electrode includes at least two sets of comb teeth.

3. The monitoring device as described in claim 1, characterized in that, The thickness of the first comb electrode is less than or equal to 20 mm; And / or, the thickness of the second comb electrode is less than or equal to 20 mm; And / or, the thickness of the insulating substrate is less than or equal to 50 mm.

4. The monitoring device as described in claim 1, characterized in that, The shape of the comb teeth of the first comb electrode is selected from any one of square, trapezoidal, triangular, wavy, fan-shaped, or bow-shaped. The comb tooth shape of the second comb electrode meshes with the comb tooth shape of the first comb electrode, and the comb tooth shape of the second comb electrode is selected from any one of square, trapezoidal, triangular, wavy, fan-shaped, and bow-shaped.

5. The monitoring device as described in claim 1, characterized in that, The shape of the insulating substrate is selected from that of a column, including a cylinder or a prism.

6. The monitoring device as described in claim 1, characterized in that, The first comb electrode and the second comb electrode are made of the same material.

7. The monitoring device as described in claim 1, characterized in that, The material of the first comb electrode is selected from any one of copper and copper alloys, aluminum and aluminum alloys, and stainless steel; or, the surface of the first comb electrode is plated with any one of copper and copper alloys, aluminum and aluminum alloys, and stainless steel.

8. The monitoring device as described in claim 1, characterized in that, The monitoring device includes at least four probes.

9. A probe, characterized in that, The probe includes: Insulating substrate; A first comb-tooth electrode is disposed on one surface of the insulating substrate; The second comb electrode is disposed on the same surface of the insulating substrate on which the first comb electrode is disposed; The teeth of the first comb electrode and the teeth of the second comb electrode are arranged alternately to form a tooth gap, and the width of the tooth gap is less than or equal to 0.1 mm and greater than 0 mm.

10. A corrosion rate monitoring method using the monitoring device according to any one of claims 1 to 8, characterized in that, The corrosion rate monitoring method includes the following steps: The data processor receives the electrochemical signal fed back by the probe and processes it to obtain electrochemical impedance data; it then generates corrosion state information based on the electrochemical impedance data.

11. The corrosion rate monitoring method as described in claim 10, characterized in that, The corrosion rate monitoring method includes the following steps: S1. The probe contacts the corrosion information of the air conditioner and feeds back an electrochemical signal; S2. The electrochemical signal is processed by a data processor to obtain electrochemical impedance data, which is then transmitted to a cloud server. S3. The cloud server generates corrosion status information of the air conditioner based on the electrochemical impedance data.

12. An air conditioner testing system, characterized in that, The air conditioner testing system includes: Air conditioner; and The monitoring device according to any one of claims 1 to 8, wherein the probe in the monitoring device is installed in the operating environment of the component under test of the air conditioner.

13. The air conditioner testing system as described in claim 12, characterized in that, The component to be tested includes the outdoor unit heat exchanger of the air conditioner.

14. The air conditioner testing system as described in claim 13, characterized in that, The electrode working surface of the probe is positioned facing the air inlet direction of the outdoor unit heat exchanger.

15. The air conditioner testing system as described in claim 12, characterized in that, The data processor is installed on the outside of the outdoor unit of the air conditioner, and the probe is installed inside the unit. The data processor and the probe are electrically connected via electrode leads.

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