Central air conditioner condenser automatic pickling integrated machine

Abstract

The utility model discloses a central air conditioning condenser automatic pickling integrated machine, including small trolley, the pickling tank of being evenly arranged on small trolley, pickling agent tank, acid -resistant pump, control mechanism, and the whole pickling tank is "L" type, and acid -resistant pump and pickling tank horizontal section outside side -by -side arrangement, and pickling agent tank is arranged on the horizontal section of pickling tank, and control mechanism is located acid -resistant pump top, and pickling agent tank top surface is equipped with pickling agent injection port, and bottom front side is equipped with pickling agent outlet, and acid -resistant pump bottom front side is equipped with acid -resistant pump pumping outlet, and bottom rear side is equipped with acid -resistant pump water outlet, and pickling tank water outlet, acid -resistant pump pumping outlet, pickling agent outlet are connected through the three -way pipeline of being equipped with three -way valve, and acid -resistant pump water outlet, pickling tank backwater all are equipped with pH value concentration sensor, the utility model has the advantages of nimble and timely call, integrated space layout is reasonable, accurate pickling agent amount adds, operation step is simple and fast, and work safety is improved.

Description

Technical Field

[0001] This utility model belongs to the field of automatic acid cleaning technology for condensers, and specifically relates to an integrated automatic acid cleaning machine for central air conditioning condensers. Background Technology

[0002] As the core heat exchange component of air conditioning and refrigeration systems, the condenser is prone to scale, rust, and other impurities adhering to its inner wall after long-term operation, leading to a decrease in heat exchange efficiency. According to statistics, for every 1mm increase in scale thickness, the heat exchange efficiency decreases by 8%-12%, requiring regular acid washing to remove it. However, the current process has the following drawbacks: 1) High difficulty in acidity control; the acid washing process requires precise control of the acid washing agent, such as the concentration of nitric acid, citric acid, phosphoric acid, etc., and the ratio of neutralizing solution. Ordinary maintenance personnel lack professional testing capabilities, and excessive acidity can easily lead to corrosion of condenser pipes, resulting in thinner copper pipe walls and increased leakage risk, or insufficient acidity can lead to incomplete cleaning; 2) Existing cleaning requires outsourcing to professional cleaning companies, which not only has a long service response cycle but also high single cleaning costs. The cost for a single cleaning of small and medium-sized units exceeds 2,000 yuan, which is difficult to meet the maintenance party's demand for "rapid response and low-cost cleaning"; 3) Cumbersome operation process; traditional acid washing requires manual addition of water, preparation of cleaning agents, and multiple acidity tests. The operation steps are complex, involving more than 10 procedures, and there are safety hazards such as acid leakage and personnel contact corrosion. Utility Model Content

[0003] This utility model aims to provide an integrated automatic acid washing machine for central air conditioning condensers, which is simple to operate, accurately controls acidity, and has low cleaning costs. It solves the problems of high acidity control, the need to entrust professional cleaning companies to operate, and cumbersome operation procedures in traditional acid washing processes.

[0004] Therefore, the technical solution adopted by this utility model is as follows: an integrated automatic acid cleaning machine for central air conditioning condensers, including a trolley, an acid cleaning tank, an acid cleaning agent tank, an acid-resistant pump, and a control mechanism, all mounted on the trolley. The acid cleaning tank is generally L-shaped. The acid-resistant pump is arranged side by side with the outer side of the horizontal section of the acid cleaning tank. The acid cleaning agent tank is placed on the horizontal section of the acid cleaning tank. The control mechanism is located above the acid-resistant pump. A water inlet is installed on the front side of the upper part of the vertical section of the acid cleaning tank, a foam outlet is provided on the top surface of the vertical section, a water return outlet is provided on the rear side of the top of the vertical section, and a drain outlet is provided on the left side of the bottom of the vertical section. The pickling tank has an outlet at the bottom front, a pickling agent inlet at the top, and a pickling agent outlet at the bottom front. The acid-resistant pump has an inlet at the bottom front and an outlet at the bottom rear. The pickling tank outlet, the acid-resistant pump inlet, and the pickling agent outlet are connected by a three-way pipe equipped with a three-way valve. Both the acid-resistant pump outlet and the pickling tank return outlet are equipped with pH concentration sensors. When the data from the pH concentration sensor deviates from the set value, the control mechanism adjusts the opening of the three-way valve in the three-way pipe according to preset parameters to regulate the amount of pickling agent added to the pickling tank.

[0005] As a preferred embodiment of the above solution, the water inlet is equipped with a water inlet float valve, which uses the buoyancy of the float to control the opening and closing of the valve, maintaining a stable water level in the pickling tank. The water outlet of the pickling tank is equipped with an electric valve, which can automatically open and close the water outlet through a control mechanism. This allows the neutralized water to be automatically discharged after cleaning and replenished with fresh clean water through the water inlet to enter the circulation until the discharged water reaches neutrality. This ensures that all chemical residues are completely removed and the equipment can be safely restored to operation. The design is reasonable and easy to operate.

[0006] Further preferably, the pickling tank has dimensions of 550mm-650mm (length) × 350mm-450mm (width) × 650mm-750mm (height), a volume of 80L-90L, and is made of polypropylene. The diameter of the froth outlet φ is 160mm-180mm. The dimensions are reasonably designed and the capacity is appropriate. Both the pickling tank return water inlet and the pickling tank outlet are equipped with DN32 connecting pipes. The diameter of the pickling tank drain outlet φ is 50mm-60mm, which is larger than that of the return water inlet and the outlet, facilitating the rapid discharge of the mixed water after cleaning.

[0007] Further preferably, the pickling agent tank has dimensions of 250mm~350mm (length) × 350mm~450mm (width) × 550mm~650mm (height), a volume of 50L~70L, and is made of polytetrafluoroethylene (PTFE). The material selection is reasonable and it is compatible with all strong acids. The diameter φ of the pickling agent injection port is 65mm~75mm, and the pickling agent outlet is provided with a DN15mm connecting pipe. The size design is reasonable.

[0008] Preferably, the acid-resistant pump is fitted with a protective housing. The protective housing has dimensions of 150mm-250mm (width) to 350mm-450mm (height) and 200mm-300mm (width). The dimensions are reasonably designed. The protective housing has pre-reserved pipe openings with a diameter greater than φ32mm at the front and rear corresponding to the acid-resistant pump outlet and inlet. The acid-resistant pump outlet and inlet are at the same height, so as not to affect the water output. The acid-resistant pump outlet is used to achieve a self-cleaning mode by connecting with the acid washing tank return water port or to the condenser inlet, which can be flexibly switched according to different cleaning modes.

[0009] More preferably, the control mechanism includes an electrical control box arranged above the acid-resistant pump and side-by-side with the pickling agent tank, and a control panel located on top of the electrical control box. The control panel is used to monitor and verify the pH values ​​transmitted by the pH concentration sensor from the acid-resistant pump outlet, the pickling tank return outlet, and the water tank return outlet. It also has upper and lower limit protection values. If the limit is exceeded, an alarm will be triggered and the dosing will be stopped. The control panel has a manual / automatic dosing function and records the pH value change curve for query and trend analysis. When the detected value deviates from the set threshold, the opening of the three-way valve is automatically controlled to add the pickling agent dosage proportionally.

[0010] A further preferred embodiment is that the trolley body is equipped with a circumferential guardrail to prevent the equipment from being moved out.

[0011] The beneficial effects of this utility model are:

[0012] (1) Compared with the traditional pickling process, which has high acidity control difficulty, requires professional cleaning company operation and has complicated operation process, this application adopts an integrated automatic pickling method, which integrates the pickling tank, pickling agent tank, acid-resistant pump and control mechanism on a trolley, which can be called up flexibly and in time. At the same time, the pickling tank is designed in an "L" shape, with the acid-resistant pump and the outside of the horizontal section of the pickling tank arranged side by side, the pickling agent tank placed on the horizontal section of the pickling tank, and the electrical control box placed above the acid-resistant pump and arranged side by side with the pickling agent tank. The control screen is located on the top of the electrical control box, which is convenient for the staff to operate. The tanks are properly arranged, which does not affect the use and reduces the space occupied. It is suitable for multiple scenarios and the space layout is reasonable.

[0013] (2) When the data from the pH concentration sensor deviates from the set value, the control mechanism controls the opening of the three-way valve in the three-way pipeline according to the preset parameters to adjust the amount of pickling agent added to the pickling agent tank. During the operation, the acidity of the solution is continuously monitored in real time to achieve accurate addition of pickling agent dosage. The operation steps are simple and fast, ensuring that the pickling solution is always in the best reaction state. When the pH value change at the return water port of the pickling tank slows down (≥3h), the completion standard is reached.

[0014] (3) Ordinary maintenance personnel do not need to master acidity detection and mixing knowledge. The equipment can automatically adjust the concentration of cleaning agent, avoiding pipeline corrosion and incomplete cleaning. It reduces maintenance costs, saves the service fees of professional cleaning companies, reduces the cost of a single cleaning by more than 60%, and can start cleaning at any time, shortening the inefficient operation cycle of the equipment, improving work safety, and fully automated operation, reducing direct contact between personnel and acid. At the same time, the sealed mixing tank design avoids acid leakage and environmental pollution. It simplifies the operation process, simplifying the traditional more than 10 manual procedures through the control mechanism, greatly reducing the operation intensity of maintenance personnel. It ensures the cleanliness of the equipment. The integrated machine has a self-cleaning function. After the cleaning operation is completed, it automatically starts the flushing and sewage discharge process to thoroughly remove residual acid and sediment impurities in the tank, ensuring the mixing accuracy for the next use, extending the service life of the equipment, and avoiding residual pollution from affecting the cleaning effect.

[0015] In summary, this utility model has the advantages of flexible and timely deployment, reasonable integrated spatial layout, precise addition of pickling dosage, simple and quick operation steps, and improved work safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 A structural diagram from another perspective. Detailed Implementation

[0018] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0019] Combination Figure 1 — Figure 2 As shown, an automatic acid cleaning machine for central air conditioning condensers consists of a trolley 1, an acid cleaning tank 2 mounted on the trolley 1, an acid cleaning agent tank 3, an acid-resistant pump 4, and a control mechanism.

[0020] The trolley 1 has a circumferential guardrail 11.

[0021] Pickling tank 2 is L-shaped.

[0022] The acid-resistant pump 4 is installed side by side with the pickling tank 2 on the outer side of the horizontal section.

[0023] Pickling agent tank 3 is placed on the horizontal section of pickling tank 2.

[0024] The control mechanism is located above the acid-resistant pump 4.

[0025] The pickling tank 2 has a water inlet 25 installed on the front side of the upper part of the vertical section, a foam outlet 24 on the top surface of the vertical section, a water return outlet 21 on the rear side of the top of the vertical section, a water drain outlet 22 on the left side of the bottom of the vertical section, and a water outlet 23 on the front side of the bottom of the horizontal section.

[0026] The pickling agent tank 3 has a pickling agent inlet 31 on the top surface and a pickling agent outlet 32 ​​on the bottom front side.

[0027] The acid-resistant pump 4 has an acid-resistant pump inlet 41 on the front side of its bottom and an acid-resistant pump outlet 42 on the rear side of its bottom.

[0028] The pickling tank outlet 23, the acid-resistant pump inlet 41, and the pickling agent outlet 32 ​​are connected by a three-way pipe 7 equipped with a three-way valve.

[0029] Both the acid-resistant pump outlet 42 and the acid washing tank return outlet 21 are equipped with pH concentration sensors.

[0030] When the data from the pH concentration sensor deviates from the set value, the control mechanism adjusts the opening of the three-way valve in the three-way pipeline 7 according to preset parameters to regulate the amount of pickling agent added to the pickling agent tank 3.

[0031] The water inlet 25 is equipped with a water inlet float valve.

[0032] The pickling tank drain outlet 22 is equipped with an electric valve.

[0033] The pickling tank 2 is preferably 550mm~650mm long × 350mm~450mm wide × 650mm~750mm high, with a volume of 80L~90L, and is preferably made of polypropylene.

[0034] The diameter φ of the foam outlet 24 is preferably 160mm to 180mm.

[0035] Both the pickling tank return water inlet 21 and the pickling tank outlet 23 are equipped with DN32 connecting pipes.

[0036] The diameter φ of the drain outlet 22 of the pickling tank is preferably 50mm to 60mm.

[0037] The pickling agent tank 3 is preferably 250mm~350mm long × 350mm~450mm wide × 550mm~650mm high, with a volume of 50L~70L, and is preferably made of polytetrafluoroethylene.

[0038] The diameter φ of the pickling agent injection port 31 is preferably 65mm to 75mm.

[0039] The pickling agent outlet 32 ​​has a pre-installed DN15mm connecting pipe.

[0040] The acid-resistant pump 4 is equipped with a protective casing.

[0041] The protective housing is preferably 150mm~250mm wide × 350mm~450mm high × 200mm~300mm in size. The front and rear of the protective housing are reserved with pipe openings larger than φ32mm in diameter corresponding to the acid-resistant pump outlet 42 and the acid-resistant pump inlet 41. The acid-resistant pump outlet 42 and the acid-resistant pump inlet 41 are flush in height.

[0042] The acid-resistant pump outlet 42 is used to achieve a self-cleaning mode with the pickling tank return water outlet 21 or to connect with the condenser inlet.

[0043] The control mechanism consists of an electrical control box 5 located above the acid-resistant pump 4 and arranged side by side with the pickling agent tank 3, and a control panel 6 located on top of the electrical control box 5.

[0044] The control panel 6 is used to monitor and verify the pH values ​​transmitted by the pH concentration sensor from the acid-resistant pump outlet 42, the pickling tank return outlet 21, and the water tank return outlet. It also has upper and lower limit protection values. If the limit is exceeded, an alarm will be triggered and the dosing will be stopped. The control panel 6 has a manual / automatic dosing function and records the pH value change curve for query and trend analysis.

[0045] Fill the pickling tank 2 with sufficient clean water, then connect the acid-resistant pump outlet 42 to the condenser inlet, connect the condenser outlet to the pickling tank return water inlet 21, and close the pickling tank drain outlet 22 to form a closed internal circulation system.

[0046] The initial injection of pickling solution rapidly lowers the pH value of the acid-resistant pump outlet 42 to 3, allowing it to enter the condenser and react with the scale.

[0047] When the scale is in the rapid consumption stage, if the pH value rises from 3 to 4 in ≤30 minutes, it indicates that the acid reaction rate is fast and there is a lot of scale residue. The automatic adjustment of the acid cleaning agent outlet in the three-way valve to 32 degrees will replenish the pH value to 3.0.

[0048] When the scale is in the medium-speed consumption stage, it takes 30 to 60 minutes for the pH value to rise from 3 to 4. The scale is reduced and the acid reaction rate is moderate. The automatic adjustment of the acid pickling agent outlet in the three-way valve to 32 degrees will replenish the pH value to 3.5.

[0049] When the pH value rises from 3.5 to 5 in ≤60 minutes, the scale continues to decrease, the acid consumption is slow, and the acid replenishment endpoint is maintained at 3.5;

[0050] When the scale is in the low-speed consumption stage and is close to being removed, if the time taken for the pH value to rise from 3.5 to 5 is >60 minutes, adjust the acid replenishment endpoint to 4.0; if the time taken for the pH value to rise from 4 to 5 is ≤120 minutes, maintain the acid replenishment endpoint at 4.0; if the time taken for the pH value to rise from 4 to 5 is >120 minutes, the cleaning is considered complete and the acid replenishment operation is terminated.

[0051] The threshold time for each stage can be adjusted according to the initial thickness of the acidity and the type of scale.

[0052] Finally, when the pH value rises to 5 within ≥120 minutes, the curve tends to flatten out, at which point the addition of more pH is stopped and the pickling process ends.

[0053] The overall process is a dynamic equilibrium process combining reaction consumption and supplementation. Its characteristic is that the pH value fluctuates within a set range, and the fluctuation period gradually lengthens as the reaction progresses.

[0054] After cleaning, the acid pickling tank drain outlet 22 and the water replenishment float valve will be opened automatically, and a large amount of clean water will be added into the system for repeated rinsing until the discharged water reaches neutral, ensuring that all chemical residues are completely removed and the equipment is safely restored to operation.

[0055] When internal cleaning of the pickling tank 2 is required, simply connect the acid-resistant pump outlet 42 to the pickling tank return water outlet 21, and automatically open the pickling tank drain outlet 22 and the water replenishment float valve to automatically add a large amount of clean water into the system for repeated rinsing.

Claims

1. An integrated automatic acid cleaning machine for central air conditioning condensers, characterized in that: The system includes a trolley (1), a pickling tank (2) mounted on the trolley (1), a pickling agent tank (3), an acid-resistant pump (4), and a control mechanism. The pickling tank (2) is L-shaped. The acid-resistant pump (4) is arranged side by side with the outside of the horizontal section of the pickling tank (2). The pickling agent tank (3) is located on the horizontal section of the pickling tank (2). The control mechanism is located above the acid-resistant pump (4). The pickling tank (2) has a water inlet (25) installed on the front side of the upper part of the vertical section, a foam outlet (24) on the top surface of the vertical section, a water return outlet (21) on the rear side of the top of the vertical section, a water drain outlet (22) on the left side of the bottom of the vertical section, and a water outlet (23) on the front side of the bottom of the horizontal section. The pickling agent tank (3) has a pickling agent injection port (31) on the top surface and a pickling agent outlet (32) on the bottom front side. The acid-resistant pump (4) has an acid-resistant pump suction port (41) on the bottom front side and an acid-resistant pump outlet (42) on the bottom rear side. The pickling tank outlet (23), the acid-resistant pump suction port (41), and the pickling agent outlet (32) are connected by a three-way pipe (7) equipped with a three-way valve. The acid-resistant pump outlet (42) and the pickling tank return port (21) are both equipped with pH concentration sensors. When the data transmitted by the pH concentration sensor deviates from the set value, the control mechanism controls the opening of the three-way valve in the three-way pipe (7) according to the preset parameters to adjust the amount of pickling agent added to the pickling agent tank (3).

2. The integrated automatic acid cleaning machine for central air conditioning condensers according to claim 1, characterized in that: The water inlet (25) is equipped with a water inlet float valve, and the pickling tank drain outlet (22) is equipped with an electric valve.

3. The integrated automatic acid cleaning machine for central air conditioning condensers according to claim 2, characterized in that: The pickling tank (2) has a length of 550mm to 650mm, a width of 350mm to 450mm, a height of 650mm to 750mm, a volume of 80L to 90L, and is made of polypropylene. The diameter φ of the foam outlet (24) is 160mm to 180mm. The pickling tank return water inlet (21) and the pickling tank outlet (23) are both reserved with a DN32 connecting pipe. The diameter φ of the pickling tank drain outlet (22) is 50mm to 60mm.

4. The integrated automatic acid cleaning machine for central air conditioning condensers according to claim 1, characterized in that: The pickling agent tank (3) has a length of 250mm to 350mm, a width of 350mm to 450mm, a height of 550mm to 650mm, a volume of 50L to 70L, and is made of polytetrafluoroethylene. The pickling agent injection port (31) has a diameter of φ of 65mm to 75mm, and the pickling agent outlet (32) is reserved with a connecting pipe of size DN15mm.

5. The integrated automatic acid cleaning machine for central air conditioning condensers according to claim 1, characterized in that: The acid-resistant pump (4) is fitted with a protective housing. The protective housing has dimensions of 150mm~250mm×width 350mm~450mm×height 200mm~300mm. The front and rear of the protective housing have reserved pipe openings with a diameter greater than φ32mm for the acid-resistant pump outlet (42) and the acid-resistant pump inlet (41). The acid-resistant pump outlet (42) and the acid-resistant pump inlet (41) are flush. The acid-resistant pump outlet (42) is used to achieve a self-cleaning mode with the acid washing tank return water inlet (21) or to connect with the condenser inlet.

6. The integrated automatic acid cleaning machine for central air conditioning condensers according to claim 1, characterized in that: The control mechanism includes an electrical control box (5) arranged above the acid-resistant pump (4) and side by side with the pickling agent tank (3), and a control panel (6) located on top of the electrical control box (5). The control panel (6) is used to monitor the pH values ​​transmitted by the pH concentration sensor at the acid-resistant pump outlet (42), the pickling tank return water outlet (21), and the water tank return water outlet, and to perform data verification. It also has upper and lower limit protection values. If the limit is exceeded, an alarm will be triggered and the dosing will be stopped. The control panel (6) has a manual / automatic dosing function and records the pH value change curve for query and trend analysis.

7. The integrated automatic acid cleaning machine for central air conditioning condensers according to claim 1, characterized in that: The trolley (1) has a circumferential fence (11) around its body.

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