Industrial water chiller has been widely used in the current industrial production. The actual effect of industrial water chiller can greatly improve the productivity. In addition, it can reasonably ensure the quality of goods and maximize the benefits of industrial production.
The chiller is a refrigerant compressor that reduces the refrigerant circulation system to cool. The refrigerant reduced by the refrigeration compressor becomes the steam medium with ultra high pressure. After the refrigeration of the heat pipe radiator, it becomes the steam body with medium temperature and high pressure. The refrigeration part is called the cooler. Generally, the refrigeration method of the chiller is divided into two types. The first is the air cooler, According to the air power of centrifugal fan rotating out, it is the refrigerant in the fin built-in cooler. The second is water cooler. The water cooler uses the refrigeration in the closed cooling tower of the circulation system according to the shell and tube heat exchanger and the refrigerant refrigeration. Both of the two cooling methods have advantages, which can be used according to the applicable standards and regional natural environment standards.
That is to say, after understanding the basic principle of refrigeration of chillers, we can analyze the causes of common high-pressure faults of chillers and how to remove them.
Common faults of working pressure of air cooler and water cooler:
The refrigeration of the air cooler is the refrigeration of the gas and the refrigerant in the water chiller system software. If there is a common fault of high pressure in the air cooler and the water chiller, the first step is to make sure that the motor fan is in normal operation. If the centrifugal fan is in normal operation, then inquire about the working temperature of that day. The main thing is to master the gas temperature extracted by the centrifugal fan and some conditions Under normal conditions, the working temperature of the air-cooled chiller is not high, but the air-cooled chiller is installed in the room or in the machine room with small indoor space. The temperature inside is generally very high. Under all normal conditions, the air cooling temperature exceeds 40 ℃.
If the above two points of the refrigeration gas are all normal, then we can first make sure that the hardware configuration of the centrifugal fan and the natural environment are all normal. Then we can check the air pressure gauge of the air cooler and the water cooler to see if the working pressure is under 25kg. In this step, we can determine whether the working pressure is really in an alarm value, or just control it Incorrect alarm in plate making. Above is the air cooler common fault alarm several reasons.
So know the reason, we will purposely clear this common fault.
If the centrifugal fan doesn't work or runs abnormally at low speed, the first thing to do is to check with an galvanometer whether the working voltage at the inlet and outlet wiring parts of the AC contactor of the centrifugal fan is in line with the scope of the application switching power supply of the equipment. If the current is normal, the motor of the centrifugal fan is damaged and replaced.
If the alarm of air cooler and water cooler installed in the room is caused by too high working temperature, first open all the windows in the machine room, or install several centrifugal fans on the wall of the machine room to reduce the room temperature. Summary: the common faults of air-cooled chillers are only due to the hardware configuration problems of heat removal parts (the hardware configuration includes: centrifugal fan, AC contactor, pressure controller) or environmental factors. Find the root of the problem, and then purposeful processing is OK.
The cooling method of the water cooler is the cooling circulating water in the glass fiber reinforced plastic cooling tower of the circulating system. Then, just like the air cooler above, we should first check whether the important hardware configuration is normal.
1. Refrigeration centrifugal pump: is everything in normal operation,
2. FRP cooling tower motor fan: is everything working properly,
3. All the mechanical parts are normal. Check the cooling circulating water pipe again to see if it is abnormal. Check the cooling water flow. This water flow can distinguish whether the water flow from the centrifugal pump is sufficient or whether the pipe is blocked by debris.
4. When everything is normal, you must check whether the inner part of the shell and tube multi cooler is too thick due to dirt, which is harmful to heat removal. According to the manufacturing industry that I have worked in for many years, in areas with poor water body and large sand and dust, it is very likely that the fouling of the cooler is a common fault of high pressure of the water cooler.
Turn off the centrifugal water pump and FRP cooling tower, remove the front cover of shell and tube refrigeration, you can see the honeycomb like heat discharge hole. If you can see the dirt on the wall thickness, you must clean the cooler.
First, drain half of the water in the FRP cooling tower, and then pour it into the descaling agent, which can be purchased at will in the market.
The scale remover is added according to the proportion of 20:1, and then the refrigeration centrifugal water pump and FRP cooling tower are operated. During this period, the chiller does not have to be started. In this way, the centrifugal water pump of FRP cooling tower is operated for 20 hours, and then the water is discharged. The cooler and FRP cooling tower are washed one by one with professional small soft brush. In the end, with the cold water cooler and refrigerant two or three times above, the foam plastic coming to the cooling water circulation is not very small, so new cooling water can be added again to start the application again.
Nanjing RICOM Refrigeration Equipment Co.,Ltd is an industry-trade integrated manufacturers for 20 years,who is engaged in the industrial temperature control technology,implements the modern quality management system ISO9001:2008 and ISO14001 environment system:2004 standard,to ensure enterprise team in technology innovation,we pay attention to customers' sense of use and satisfaction, and get the consistent recognition of the industry and customers;obtained AAA credit rating certification.In 2016, it was awarded as a contract abiding and trustworthy enterprise.In 2013,the company established the production base of chiller and mould tempering machine in Chuzhou RICOM plastic technology Co.,Ltd.
