Deep cleaning of air conditioners in Tiexi District, Shenyang: Transformation from “health killer” to “air steward”
In Tiexi District, Shenyang, many families and businesses have encountered the same trouble. That is, after the air conditioner has been used for several years, its cooling and heating effects have become poor, and the wind blowing out has a musty smell. This is not just due to the lack of fluorine, the more critical problem is the deep pollution inside the air conditioner. As a senior housekeeper, I have witnessed too many respiratory problems caused by neglect of cleaning. Today, we will take a three-bedroom and one-living room in an old community in Tiexi District as an example to deeply analyze the complete air-conditioning in-depth cleaning and maintenance process.
Precise diagnosis and tool selection: Dimension reduction attack with professional equipment
After receiving the repair notification from the customer, our work team rushed to the place where the incident occurred immediately. The customer said that the cabinet refrigeration equipment in the living room was cooling slowly and there was a strange smell. We did not take immediate action, but started to repair the disease first. To diagnose the disease, a pressure gauge was used to test the pressure of the appliance system. It was noticed that the pressure was lower than normal, and it was initially speculated that there was a slight leak. At the same time, an endoscope was used to inspect the deeper parts of the evaporator, and a large number of thick mold spots and dust accumulation were seen.
In response to this situation, we have prepared a complete set of tools. In addition to the basic screwdrivers and wrenches, the important equipment is a high-temperature steam cleaner, a professional-grade air-conditioning cleaner with neutral and non-corrosive properties, a long-bristled brush, a high-pressure spray can and a fluoride kit. It should be noted that household washing powder and dishwashing liquid are strictly prohibited because they will corrode the hydrophilic coating on the surface of the fins, making the fins more susceptible to dust.
Refined disassembly and protection: reject “violent repair”
Many are not professional cleaning, just simply flushing the filter. We are different. First, cut off the power supply. This is an ironclad rule. Then, carefully remove the panel, air deflector, and filter. For common wall-mounted machines and cabinet machines in Tiexi District, we will use special protective covers to cover the walls and floors below to prevent sewage from splashing around during the cleaning process.
The most critical step is to disassemble the wind wheel and volute. This is the "hardest hit area" for dust and bacteria. If you don't dismantle it, you won't be able to clean it thoroughly. We used special tools to dismantle it and saw the black, sticky sludge attached to it. All customers were amazed.
High-temperature steam and deep cleaning: a visible “detoxification” process
Start the formal cleaning step, rinse the filter with clean water and let it dry. Then start cleaning the evaporator, spray neutral cleaning agent evenly on it, and wait for a few minutes to encourage the foam to fully disintegrate stubborn dirt. At this moment, focus on the wind wheel, which is soaked separately in warm water containing special detergent, and carefully scrub each fan blade with a brush until the fan blades are exposed to their original plastic color.
The "high-temperature steam cleaning machine" has appeared. High-temperature steam upwards of 120°C carries out deep cleaning towards the evaporator, air duct and water tray. This can not only dissolve oil stains, but also kill germs, viruses and mold hidden in them. Looking at the dark brown sewage flowing out of the drain pan, the customer immediately understood why the air conditioner always had a strange smell. The entire cleaning process strictly followed the principle of "inspect first, then quote, and repair in person", allowing the customer to supervise the entire process.
Detail processing and fluoridation operation: ensuring optimal working conditions
Once the cleaning was complete, we began to address the diagnosed fluorine deficiency. Reinstall the cleaned filter screen, wind wheel and other parts according to the original route. At this point, connect the fluoride kit. With the experience of the master, he first closed the refrigerant bottle valve body and tested the current pressure. It was indeed 4 pressures lower than the standard value.
The refrigerant bottle is opened, and when the air conditioner is in cooling operation, quantitative filling is carried out from the fluoride port of the low-pressure pipe (thick pipe). We use an electronic scale to measure accurately, instead of just looking at the pressure gauge, which is more scientific. When adding fluoride, observe the pressure gauge pointer. When the pointer stabilizes between 4 and 5 pressures, the valve is closed, and then the air conditioner is run for 15 minutes. Use a thermometer to measure the temperature difference between the inlet and outlet. It reaches above 12°C, far exceeding the standard 10°C. The effect is quickly apparent.
Pitfall avoidance guide and effect comparison: Make every penny worth it
During the service process, the customer also told about his past experience of being attracted by the low price. As a result, the other party only performed a simple filter cleaning operation, and also claimed to charge fluoridation fees based on pressure. Here I must give a reminder to all my friends in Tiexi District:
Pitfall 1: There is such a trap as "no startup fee". We always insist on clear price tags, and will issue a formal price list after maintenance. There is no hidden consumption. Those who claim that they do not charge a startup fee often rip people off in terms of accessories and Freon.
2. Avoid Pitfall 2: It is unreasonable to charge according to "pressure" for adding fluoride : There is a fixed amount of fluorine for an air conditioner to be filled up. It is very easy to be cheated if you charge according to pressure. In this regard, we have always insisted on quoting by "time" or "station", so that it is transparent and fair.
3. Avoid pitfall 3: The cleaning water temperature should not exceed 5℃? There is a clerical error here from the original text, which should be "not to exceed 50°C". Overheated water will cause damage to the filter, but there is no need to use water that is close to freezing point, just normal temperature water.
The comparison of the final results is shocking. Before cleaning, the air outlet had a musty smell, the cooling speed was slow, and the power consumption was high. After cleaning and fluoridation, the wind speed was very fast, the air appeared fresh, and the temperature difference was significant. We filled out the warranty form for the customer, made a one-year warranty commitment, and provided formal documents. Seeing the customer's satisfied smile, we understood that what we were protecting was not just an air conditioner, but also the respiratory health of the family.