Corrosion monitoring and repairing device for condenser

Abstract

According to the corrosion monitoring and repairing device for the condenser, the condenser comprises a copper pipe, a coating is arranged on the surface of the copper pipe, a polymer microcapsule is doped in the coating, and the polymer microcapsule comprises a wall material capable of being broken along with breakage of the copper pipe and a core material arranged in the wall material. The core material comprises a fluorescent agent which can be released when the wall material is in a broken state and a repairing agent which can be cured when encountering water so as to repair the damaged area of the copper pipe, and an image recognition device which can recognize the released fluorescent agent is installed outside the condenser. According to the corrosion monitoring and repairing device for the condenser, when the copper pipe is corroded and broken, the fluorescent agent is released in the corroded area, the image recognition device monitors the fluorescence phenomenon so as to monitor the corrosion condition of the copper pipe of the condenser, and the coating and the microcapsule are also broken; hexamethylene diisocyanate is released in the damaged area and spontaneously reacts with water on the surface of the condenser to form a curing material, and the material can automatically fill and repair the damaged area of the copper pipe, so that the damaged copper pipe of the condenser is repaired.

Description

Technical Field

[0001] This utility model relates to heat exchangers, and more particularly to a corrosion monitoring and repair device for condensers. Background Technology

[0002] A condenser is a type of heat exchanger that converts gas or vapor into liquid, transferring heat from the tubes to the surrounding air. Most air-cooled condensers are exposed to harsh environments like wind and sun for extended periods, and some, to achieve specific functions, are in prolonged contact with water, making them highly susceptible to corrosion. Currently, the following solutions address condenser corrosion: One solution is to increase the thickness of the copper tubes, making them less prone to corrosion and leakage. However, this solution has the drawback of reducing the heat transfer coefficient of the copper tubes, affecting cooling / heating performance. Another solution is to add galvanized edge plates to the condenser to delay corrosion, but these plates can gradually promote corrosion during the process, potentially exacerbating it. A third solution involves salt spray testing to determine if the condenser will function properly after a certain period in this environment. However, this solution has the drawback of not being able to cover all user scenarios during salt spray testing, and even if the salt spray test is passed, it cannot guarantee that the condenser copper tubes will not corrode to the point of leakage after several years of use. In addition, existing technologies also disclose methods for repairing corrosion of condensers, such as the Chinese invention patent No. 202010170413.X (authorization announcement No. CN 111451709 B) which discloses "A Method for Replacing and Repairing the Integrated Gas Bag of a Condenser Shell". This method involves using an electric grinder to cut an incision on the outer edge of the damaged integrated gas bag, inserting fire-retardant material into the condenser shell through the incision to cover the copper tubes inside, and then gradually cutting away the damaged integrated gas bag using a pneumatic cutter. The cut on the condenser shell after removing the integrated gas bag is then smoothed. A new gas bag is fabricated and welded to the original location where the integrated gas bag was cut away. A fastening band is fabricated with through holes drilled in it, and the fastening band is rolled and fitted onto the outer edge of the new gas bag. A plunger matching the size of the through holes is fabricated and welded to the through holes. Finally, the condenser's sealing performance is tested. The repair method is quite complex and cannot provide real-time monitoring of the corrosion status of the condenser. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a method that can detect the corrosion of condenser copper tubes in real time, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a corrosion monitoring and repair device for a condenser, wherein the condenser includes a copper tube, characterized in that: the surface of the copper tube is provided with a coating, the coating is incorporating polymer microcapsules, the polymer microcapsules include a wall material that can break along with the copper tube and a core material disposed inside the wall material, the core material includes a fluorescent agent that can be released when the wall material breaks and a repair agent that can be cured by water to repair the damaged area of ​​the copper tube, and an image recognition device that can identify the released fluorescent agent is installed on the outside of the condenser.

[0005] Preferably, the repair agent is hexamethylene diisocyanate.

[0006] Further preferably, the hexamethylene diisocyanate reacts with water to form a polyurea repair block, which is then filled into the damaged area of ​​the copper pipe to achieve copper pipe repair.

[0007] The wall material can be made of a variety of materials, and preferably, the wall material is polyurea-formaldehyde.

[0008] The fluorescent agent can be of various types; preferably, it is a fluorescent agent with aggregation-induced emission effect. Further, the fluorescent agent can be TPE-1NO2, TPE-1NH2, etc.

[0009] In order to deliver condensate to the surface of the condenser, the exterior of the condenser is provided with a condensate delivery device for distributing water to the surface of the copper tubes of the condenser.

[0010] More preferably, the coating is an epoxy coating.

[0011] As a preferred embodiment of any of the above solutions, the condenser is provided with a mounting base on its exterior, and the image recognition device is mounted on the mounting base.

[0012] Compared with the prior art, the advantages of this utility model are as follows: The corrosion monitoring and repair device for the condenser adds a coating with a fluorescent agent to the surface of the copper tube of the condenser. When the copper tube corrodes and cracks, the fluorescent agent is released in the corroded area, and the image recognition device detects the fluorescence phenomenon to monitor the corrosion of the copper tube of the condenser. In addition, by adding hexamethylene diisocyanate (HDI) as the core material in the polymer microcapsules, when the copper tube corrodes and cracks, the coating and microcapsules also rupture, and HDI is released in the damaged area. HDI can spontaneously react with water on the surface of the condenser to form a solidified material. This material can automatically fill and repair the damaged area of ​​the copper tube, thereby realizing the repair of the damaged copper tube of the condenser. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the detection device according to an embodiment of the present invention;

[0014] Figure 2 for Figure 1 A schematic diagram of the detection device from another angle;

[0015] Figure 3 This is a cross-sectional view of the copper tube before corrosion in this embodiment;

[0016] Figure 4 This is a cross-sectional view of the copper tube after corrosion in this embodiment;

[0017] Figure 5 This is a cross-sectional view of the copper pipe after repair in this embodiment. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 and Figure 2 As shown, the corrosion detection and repair device for the condenser in this embodiment has a mounting base 5 on the outside of the condenser, and an image recognition device 4 is mounted on the mounting base 5. The condenser has a copper tube 1, and the surface of the copper tube 1 is coated with a coating 2, preferably an epoxy coating. Polymer microcapsules are incorporated into the coating 2, and the polymer microcapsules are distributed throughout the entire coating, serving as a self-sensing luminescent coating for the condenser copper tube 2. Specifically, the polymer microcapsules include a wall material and a core material, with the core material encapsulated inside the wall material. In this embodiment, the wall material is polyurea-formaldehyde, and the core material includes a fluorescent agent and a repair agent. The fluorescent agent is an aggregation-induced emission fluorescent agent, i.e., an AIE fluorescent agent, such as TPE-1NO2 or TPE-1NH2. The repair agent is hexamethylene diisocyanate, i.e., HDI, which can spontaneously react with water to form a polyurea solid material.

[0020] The condenser is equipped with an external condenser delivery device (not shown in the figure) to deliver condensate to the surface of the copper tube 1 of the condenser, so that the condensate is distributed on the coating 2 on the outside of the copper tube 1. For example, in existing refrigeration range hoods, air conditioner condensate is collected and delivered to the condenser to dissipate heat and improve its heat exchange efficiency.

[0021] like Figure 3 As shown, when the copper tube 1 is intact, the coating 2 covers the outer surface of the copper tube 1. Figure 4 As shown, when copper pipe 1 corrodes and cracks, coating 2 and polymer microcapsules also rupture, i.e., the wall material cracks. The AIE fluorescent agent inside the microcapsules is released into the corroded area. Due to the accumulation of AIE fluorescent agent in this area, it emits strong fluorescence. Image recognition device 4 can emit ultraviolet light to monitor the fluorescence phenomenon. When fluorescence is detected, the machine reports a malfunction, reminding the user that there is a risk of leakage in the condenser copper pipe. Figure 5As shown, at the same time, HDI is released in the damaged area 11. HDI can spontaneously react with water on the condenser surface to form polyurea solid material, that is, polyurea solid material forms polyurea repair block 3. Polyurea repair block 3 automatically fills and repairs the damaged area 11 of the copper tube, thereby realizing the repair of the damaged condenser copper tube 1.

Claims

1. A corrosion monitoring and repair device for a condenser, the condenser comprising a copper tube (1), characterized in that: The surface of the copper tube (1) is provided with a coating (2), and polymer microcapsules are incorporated into the coating (2). The polymer microcapsules include a wall material that can break as the copper tube (1) breaks and a core material disposed inside the wall material. The core material includes a fluorescent agent that can be released when the wall material breaks and a repair agent that can be cured by water to repair the damaged area (11) of the copper tube (1). An image recognition device (4) that can identify the released fluorescent agent is installed on the outside of the condenser.

2. The corrosion monitoring and repair device for condensers according to claim 1, characterized in that: The repair agent is hexamethylene diisocyanate.

3. The corrosion monitoring and repair device for condensers according to claim 2, characterized in that: The hexamethylene diisocyanate reacts with water to form a polyurea repair block (3), which is then filled into the damaged area (11) of the copper tube (1) to repair the copper tube (1).

4. The corrosion monitoring and repair device for condensers according to claim 1, characterized in that: The wall material is polyurea-formaldehyde.

5. The corrosion monitoring and repair device for condensers according to claim 1, characterized in that: The fluorescent agent is a fluorescent agent with aggregation-induced emission effect.

6. The corrosion monitoring and repair device for condensers according to claim 1, characterized in that: The condenser is externally provided with a condensate delivery device for distributing water to the surface of the copper tube (1) of the condenser.

7. The corrosion monitoring and repair device for condensers according to claim 1, characterized in that: The coating (2) is an epoxy coating.

8. The corrosion monitoring and repair device for condensers according to any one of claims 1 to 7, characterized in that: The condenser is provided with a mounting base (5) on its exterior, and the image recognition device (4) is mounted on the mounting base (5).

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