How is a qualified air source heat pump produced?In recent years, as the demand for air source heat pumps has increased, more and more customers have begun to seek efficient and reliable air source heat pump production lines and testing equipment to improve production efficiency and quality. The whole air source heat pump is no longer unfamiliar to many people, but a qualified heat pump product has to go through the system testing from assembly to leaving the factory. Except for professional air source heat pump manufacturers, most people may not And know.
The main processes of air source heat pump production include assembly, heat exchanger detection for large leaks, system vacuum, refrigerant filling, leak detection (water inspection), performance testing, etc., only through the strict inspection of these processes, can it be called one Qualified heat pump products. Below we give a detailed introduction to several key processes of heat pump production.
1. Assembly conveyor line
When dealers understand an air source heat pump factory, they will always hear the manufacturer introduce "how many production lines there are", because the production line represents the production capacity of an enterprise, but the design of different production lines brings production efficiency. Is totally different. At present, the heat pump assembly line is divided into two types: power line and unpowered line. Under normal circumstances, 3-10P models use more automatic lines, while models above 10P have lower production capacity and larger units. Use manual line.
At present, the industry's professional air source heat pump production equipment manufacturers can design reliable, durable and beautiful power or unpowered transmission lines according to customer layout and product specifications, including roller lines, chain plates, and differential lines. From the compressor chassis on the line, intermediate processes, quality control points to packaging and offline and production line layout, to the planning of all inspection equipment such as semi-finished products, incoming materials, materials, tools, etc., the most professional services are required. Is the most basic.
2. The heat exchanger detects large leaks
When assembling heat pump components, the connection between the compressor's intake and exhaust parts and the evaporator and the connection of the four-way valve need to be welded, but during the welding process, false welding, false welding and welding may occur In the case of insecurity, this requires the first inspection of heat pump products to detect large leaks.
In order to ensure the welding reliability of the heat exchanger, it is usually necessary to use 3.5MPa (35 kg) high-pressure nitrogen that exceeds the actual operating pressure of the heat pump to detect large leaks. The purpose is to detect the weak and micro holes generated by the welding and avoid the equipment during transportation. Or after being put into use, due to the impact of the refrigerant pressure (1.5MPa), the leakage rate increases and the product quality becomes problematic.
3. Vacuum the system
After the large-leak detection process is completed, the system evaporator pipeline is filled with nitrogen, and some water vapor and volatile oil produced during the manufacturing process. If the gas in the system is not eliminated, it will affect the energy efficiency of the heat pump and the service life of the equipment. In order to ensure the cleanliness of the equipment and make it operate normally, and at the same time to test the sealing degree of the system, in preparation for filling the refrigerant, the heat pump product must be vacuum tested.
Vacuum pumping is divided into initial pumping and fine pumping. The first pumping is pumped from the standard atmospheric pressure to 300Pa, and then the fine pumping is performed after reaching the requirement, from 300Pa to 25Pa, and then the pressure is maintained, to see if the vacuum value reaches the return within the specified time. Bomb value. At present, most vacuum equipment can be matched with a variety of vacuum gauges and a variety of vacuum detection methods. From the most basic vacuum gauge display value → programmed vacuum value → the most advanced automatic scan code to automatically call the set vacuum value → automatic tripping and other 7 levels of vacuum equipment to meet the different needs of customers.
4. Refrigerant filling
Refrigerant filling is one of the most critical links in the manufacturing process of air source heat pumps. To achieve mass production, the accuracy and speed of filling are important. In this regard, the explosion-proof charging machine can charge explosive refrigerants such as R22, R134a, R407c, R410a, R600a, R32, R290, R1234YF, etc. The ordinary filling machine can charge R22, R134a, R407c, R410a refrigerant. In addition, refrigerant charging machines are mostly controlled by microcomputers, with very high accuracy, just like gas station refueling machines, no matter what refrigerant, set the charging value, you can fill it quantitatively.
5. Air source heat pump commodity inspection
After the refrigerant filling is completed, the heat pump unit must be equipped with components such as fan, electric control, wiring, etc., install the entire system, and then conduct safety testing. When the safety of the product is qualified, the heat pump product will be sent to the inspection room for final commodity inspection. Commodity inspection equipment mainly realizes the detection of various performances of the heat pump, including the water flow, electrical parameters (current, voltage, frequency) of the test product, the pressure difference between the inlet and outlet water, the temperature difference between the inlet and outlet water, the system pressure, the calculation of the COP, the configuration, etc. Through the touch screen display of the test station, the manufacturer can completely see the real-time test data and the comparison of the change curve of various parameters with the standard data, and will obtain the result sound and light alarm prompts, and the data will be automatically uploaded to the host computer for storage and printing, forming a special Some barcodes. The heat pump that finally passed the commodity inspection is a qualified product, and the rest is packaged and shipped out. Of course, this process should not be underestimated. After all, cotton-bonded heat preservation is also a matter of concern to a unit.
Alright, come here first today! Today is the last day of 2020, and 2021 is coming soon. There are also many private messages to me from small partners, and I know many seniors. We must do our best to literacy and solve problems for everyone.
The air source heat pump industry has developed for decades, but the general public is still a little-known product for air energy. This is a good energy-saving and environmentally friendly product, and the national government is also vigorously promoting it. Leomon just wants to do his best, and only hopes to provide a little help for everyone to understand the air source heat pump.