Factors affecting the service life of high and low temperature integrated machines

According to the temperature and medium, the high and low temperature integrated machine can be divided into oil-cooled high and low temperature integrated machine and water-cooled high and low temperature integrated machine. The service life of the high and low temperature all-in-one machine is generally 5-10 years, and there are many reasons that affect its aging and reduce the service life. Let's briefly understand the following points.

1. Working temperature: As the machine operation will generate high temperature and the surrounding temperature will rise, which will increase the intensity of light and the degree of destruction. Therefore, when working with high and low temperature equipment, it is necessary to grasp the application range of temperature.

2. Humid and cold environment: General humidity, precipitation, dew, etc. are all factors that cause dampness and coldness of machinery and equipment. Dewdrops produced by moisture are the key factors for outdoor dampness and coldness. Natural ventilation should be considered, otherwise it will cause severe damp and cold digestion and absorption.

3. Seal failure: Seal failure is caused by corrosion, heat loss, wear, installation, operation and other reasons. After the autoclave mechanical seal is removed, the sealing surface is not scratched or worn, so physical damage to the sealing surface can be ruled out. According to the various manifestations of crystallization, fouling and mechanical seal failure in the sealed inner cavity, it is preliminarily determined that the easy crystallization and corrosion of the conveying medium are the main reasons for the seal failure.

Air-cooled chiller and water-cooled chiller

 Chiller is an energy-saving machine that achieves cooling effect through vapor compression or absorption cycle. First of all, we need to distinguish the types of chillers: general chillers are divided into two types: water-cooled chillers and air-cooled chillers.

The air-cooled chiller contains a water tank and a water pump, and does not need a cooling tower to dissipate heat. Easy to install and move. But it has higher requirements on the environment. First of all, because it is cooled by hot air circulation, if the ventilation effect of the installation workshop is not good, it will directly affect the cooling effect of the chiller. In addition, if you want to put the chiller in a clean room with humidity requirements, the top of the equipment will generate a lot of water vapor.

Water-cooled chillers are divided into open chillers, sealed (also known as box chillers) and screw chillers. The water-cooled chiller must be equipped with a cooling tower and a water pump, so as to achieve a better cooling effect. The open type chiller also needs to install an additional water tank, but the sealed type does not need it, because the water tank is installed in the equipment itself. The open type is generally installed outside the workshop for easy maintenance, but because it is not beautiful enough, a sealed water-cooled chiller has been produced. The sealed water-cooled chiller is a box structure, which is very convenient to install and use.

If there is a problem with the chiller, a comprehensive analysis should be made from the relevant indicating instruments and the chiller operation data and materials obtained by means of viewing, hearing, touching, etc. to find out the basic cause of the failure, and then take corresponding measures.

How to clean heating and cooling equipment?

Intelligent heating and cooling equipment is mainly used to control the temperature of various reactors. Compressor cooling is used to heat the heat transfer oil, and the medium in the cold tank is heated to high temperature by the heater. According to the needs of users, the temperature of the storage tank medium in high and low temperature environments can be quickly adjusted. Long-term operation will cause fouling on the surface of the condenser of the equipment, which will seriously affect the normal operation of the high and low temperature equipment in the laboratory.

1. The intelligent heating and cooling equipment is an integral equipment. The refrigeration system and the heating system are installed in the same case. This equipment is generally installed indoors and placed on a well-ventilated, dust-free, cool ground or test bench to avoid droplets. , water vapor, high-frequency equipment (high-frequency welding machine), and places where acidic solutions are frequently used.

2. If you want to clean the equipment, you must disassemble the machine first, because the parts to be cleaned are invisible inside. The various parts of the refrigeration unit intersect with each other, and the pipelines are complicated and difficult to disassemble. First of all, we must understand the basic situation of the entire structure.

3. Clean the connection between the equipment and the condenser. After disassembling in the previous step, find out the direction of the water inlet of the condenser, connect it to the water inlet or water outlet of the water pump, and then use tools to heat the pipe.

4. After confirming that each step is completed, add clean water to wash for 20 minutes, then discharge the sewage, repeat this three times, and finally need cleaning agents. Of course, the pH value should be kept between 4-5 for 2-3 hours.

5. After cleaning, install it according to the original shape. This is the main step for cleaning intelligent heating and cooling equipment.

Precautions for operation of refrigeration and heating all-in-one machine

The high and low temperature all-in-one machine is a new type of laboratory temperature control equipment, which has the functions of heating and cooling at the same time, and can achieve continuous temperature control from -120 ° C to 300 ° C with the same medium, eliminating the cumbersome steps of replacing the medium. According to the temperature and medium, the high temperature all-in-one machine is divided into oil-cooled high-low temperature all-in-one machine and water-cooled high-low temperature all-in-one machine. Applied to petrochemical, pharmaceutical and other chemical reaction process control.

1. Operation requirements. Equipment management personnel need to be familiar with the basic performance and main operation steps of the equipment, keep the technical data and operating instructions properly, and then check the protection device according to the start-up requirements of the equipment, control the ambient temperature, humidity, continuous working time, power supply voltage, etc., pay attention to moisture, Dust and corrosion resistant.

2. Power requirements. Conduct a power-on inspection, and if any circuit failure is found, please immediately shut down the device and report to the person in charge to prevent damage to the instrument due to short circuit. The power used by the high-precision high-low temperature all-in-one machine needs to meet the total power requirements of the machine, and the models of all-in-one machines are different, so the power should be determined according to the specific model. The required power is greater than the total power of the device, and the power supply needs to be grounded to ensure the use of

3. Shutdown request. If you do not use the device temporarily, you need to turn off the switch and unplug the power cord. The liquid in the storage tank also needs to be cleaned.

4. Maintenance requirements. Regularly maintain high-precision high and low temperature temperature control machines, solve instrument failures in time, maintain records, and clean and maintain large-scale equipment 2-4 times a year. Damaged equipment should be inspected by relevant personnel.

Features of cooling and heating systems

1. Heating and cooling system: -120 ~ +300°C, temperature control accuracy ±0.5°C.

2. Refrigeration: Single-unit cascade refrigeration is adopted, and the cooling capacity: 1 to 1000KW is available.

3. Control system: programmable PLC plus touch screen.

4. With RS485 and R232 interfaces, it can communicate with the computer so as to accept the setting and control of the computer and transmit the measured temperature to the computer.

5. Imported heat transfer fluid can be used.

6. The transmission pump adopts a magnetic pump, which has no leakage, no pollution and high lift.

7. The liquid storage tank and the pipeline are sealed and pressure-bearing to prevent the volatilization, condensation and freezing of the refrigerant, and there is a liquid level indicator.

8. For small load heating, the hot gas bypass of the compressor can be used to heat the load.

9. Multiple alarm protections: water cut off, high water temperature, circulating pump failure, compressor overheating, high pressure, overcurrent, phase loss, phase continuity, etc.

10. Heat dissipation method: air cooling and water cooling are optional, and the air-cooled condenser can be placed outdoors. Due to the many industries and purposes of the equipment application, the model cannot be fixed, and most of them need to be tailored according to the actual situation of the user.

The refrigeration principle of the chiller

The whole working principle process of industrial water chiller can be roughly divided into three parts: water circulation system, refrigeration circulation system and main control system. The water circulation system is also a part that directly reflects the function of the industrial water chiller. It transmits the cold water to the equipment that needs to be cooled, and the cold water absorbs the heat of the equipment and then transmits it back. The refrigeration cycle system is a process of cooling the cold water that absorbs heat. The refrigerant sublimates and then compresses to bring the heat in the cold water to the outside for dissipation. The main control system is the part of power control and internal structural components control.

Why do you need a chiller?

Industrial chillers are cooling equipment for cooling and constant temperature water circulation systems that are used in both industrial production and scientific experiments. They are generally called chillers or industrial chillers. Inject a certain amount of tap water or pure water, demineralized water, antifreeze and other refrigerants into the circulating water storage tank of the industrial chiller, cool the refrigerant through the refrigeration system of the industrial chiller, and then put the low-temperature cooled refrigerant It is transported to production or experimental equipment by a circulating pump for cooling. The brine of the industrial chiller will take away the heat, flow back to the water tank after raising the temperature, and then cool the brine through the refrigeration system.

It can be said that as long as there is equipment working, heat will be generated. With heat, production equipment and experimental equipment may lose their performance, seriously affect the normal operation of the equipment, and endanger the service life of the equipment. Therefore, all production companies can use industrial chillers. Of course, companies in different industries have different requirements for the specific use of industrial chillers. When choosing industrial chillers, many companies will consider the production environment, investment benefits and operating costs, as well as the special requirements of refrigerants. These are the basic common sense that companies should know when choosing industrial chillers.

Choose a cost-effective industrial chiller to make you handy. If your company needs to be equipped with customized industrial chillers in the production process, you must first consider the actual situation of your company, formulate a detailed demand plan for industrial chillers, and choose a suitable brand to cooperate with industrial chiller manufacturers with good reputation. .

What is a Chiller?

A chiller is a cooling device that can provide constant temperature, constant flow, and constant pressure. It plays a very important role in the process of cooling in industrial production. Industrial chillers use industrial refrigeration technology to circulate chilled water or refrigerated liquid through water pumps to cool down machinery or equipment or products, and are used to control the temperature of machinery or products in various industries to ensure product quality and stably improve the production efficiency of enterprises . The industrial chiller equipment uses imported parts and equipment with high stability and safety, so there will be basically no failures. But the more troublesome place for enterprises is that energy consumption will continue to increase. Therefore, enterprises must conduct comprehensive inspections on equipment on a regular basis to ensure long-term stable operation of equipment.

Application Industries of Water Chillers

Chillers are widely used in plastics, electroplating, electronic devices, chemical plants, pharmaceuticals, packaging and printing, food and other industries, and are used in industries that require cooling water such as production, refrigeration and manufacturing.

1. Chemical industry

It is mainly used in the cooling of chemical reaction kettles (heat exchangers in chemical plants), which can immediately remove the huge heat generated by chemical changes, and then achieve the purpose of cooling and improve product quality.

2. Manufacturing industry of plastic products

In the injection molding of plastic products, the efficient and rapid cooling effect will affect the surface smoothness and appearance design compliance rate of the equipment, which in turn will affect productivity, product cost and corporate profits.

3. Electronic device industry

In the production process of electronic components, the components need to be kept low temperature or cooled at a special temperature, and the technical parameters of electronic device components can be manipulated within the set range.

4. Pharmaceutical industry

The pharmaceutical industry is mainly used in the adjustment of production line temperature and humidity and the determination of chemical equilibrium constants in the production process of raw materials.

5. Cooling of electroplating solution, gear oil and cutting tool coolant of CNC lathe

In electroplating production, the electroplating solution continuously generates heat during the electroplating reaction, and then the temperature of the electroplating solution rises gradually. When the temperature of the electroplating solution is higher than the requirements of the processing technology, it will affect the firmness of the surface coating of the produced electroplating products. , Uniformity, flatness and surface smoothness have great influence. Therefore, it is necessary to choose the cold water provided by the appropriate chiller to cool and maintain the temperature control of the electroplating aqueous solution, which will greatly improve the electroplating production process and productivity.

6. Cooling of CNC lathe cutting tool coolant

The control of the cutting edge temperature of the CNC blade will affect the service life and product quality of the CNC blade at the same time.