The refrigeration principle of the chiller is that the compressor sucks low-pressure and low-temperature refrigerant vapor from the evaporator, and compresses it. The adiabatic compression of the machine is called high-pressure superheated steam, and then it is pressed into the condenser for constant pressure cooling, and heat is released to the cooling medium, and then cooled into subcooled liquid refrigerant. , evaporating and absorbing the heat in the air-conditioning circulating water in the evaporator, thereby cooling the air-conditioning circulating water to achieve the purpose of refrigeration, and then being sucked into the compressor again, and this cycle works.

The accumulation of a large amount of scale, dirt and biological sludge on the inner wall of the condenser tube makes the heat transfer of the condenser Efficiency is reduced. The traditional treatment method of condenser tube fouling is chemical water treatment and periodic manual mechanical brushing. However, chemical water treatment cannot completely solve the fouling, slime deposition, bacteria, algae, and rust generation, so regular mechanical brushing is required. The traditional treatment method is time-consuming and labor-intensive, and now the condenser online cleaning device replaces the regular mechanical brushing, so that the condenser tube is always in a clean state.

On-line condenser cleaning device

Central air-conditioning condenser and evaporator pipes are easily fouled, so it should be done normally during the summer cooling period For daily water treatment, otherwise, in the environment of high-hardness water quality, the inorganic salts dissolved in water in the circulating water system will crystallize and precipitate as the temperature increases, and scale will form on the tube wall of the heat exchange surface of the condenser, resulting in heat exchange. Efficiency is reduced. At the same time, when the hard scale increases, the energy consumption will increase. When the hard scale is 1mm thick, it will increase by 6% to 10%; due to the formation of dirt by the soil, sediment and humus of the water, plus bacteria, algae and other microorganisms and their secretions The formed biological sludge will adhere to the wall of the condenser heat exchange tube to form sludge, which will cause the pipeline to be blocked in severe cases; and the fouling and sludge will affect the heat exchange efficiency, consume more power, cause high-pressure operation, and in severe cases, cause overheating. Press stop. All of these seriously affect the normal operation of heat exchange equipment.

On-line condenser cleaning device is the best equipment to effectively clean the cooling pipe of the central air conditioner. The performance of the device directly affects the cleaning degree and heat transfer effect of the cooling pipe of the host. In recent years, the market of central air conditioners has been expanded. The condenser online cleaning device is widely used in the cleaning of central air conditioners. In the case of continuous operation without reducing the load, it can be cleaned online at any time, which can always keep the cooling pipe clean and extend the cooling pipe. The service life is reduced, the labor intensity is reduced, and the economic benefit is increased. The condenser online cleaning device is an indispensable device for the safe and economical operation of the central air conditioner.

How it works:

The ball collector sends the glue ball into the condenser, and the glue ball depends on the height of the cooling water The flow rate scrubs off the dirt on the inner wall of the heat exchange copper tube of the condenser, and at the outlet end of the cooling water, the rubber balls are recovered through the ball water separator through the ball collection tube and returned to the ball collector and ball drive device to form a cleaning cycle. The cleaning frequency is set through the Siemens PLC intelligent control box to achieve the automatic online cleaning function, and the inner wall of the condenser is always kept clean, the heat exchange efficiency is high, and the cooling efficiency of the chiller is high.

Parts of the condenser online cleaning device:

1. Ball collector

The ball collector is a ball automatic cleaning system for loading, driving and observing Equipment for the operation of the gumball. It is mainly composed of shell, top cover, ball collecting bucket, switching valve, inlet pipe and outlet pipe and one-way valve. A plexiglass observation window and an exhaust valve are installed on the top cover, and a drain valve is installed in the lower part of the shell. The ball catcher is designed with enough volume to ensure that the rubber balls have room to swivel in the ball catcher. Among them, the ball collecting bucket, switching valve and one-way valve are all made of 304 stainless steel. Due to the unique one-way valve device designed in the ball collecting and driving device, the original electric door is cancelled, which not only simplifies the rubber ball cleaning system and operation, but also facilitates automatic control and improves the reliability of operation.

2. Ball water separator

Ball water separator is one of the key components in the process of rubber ball cleaning in the condenser. To maintain the continuous cleaning of the condenser tube by the rubber balls, the rubber balls must be continuously fed into the cleaning system, and then the rubber balls cleaned from the cooling tube should be recovered in time and used again for cleaning. The ball water separator is used to collect all the rubber balls dispersed in the cooling water for reuse, so the ball collection rate of the ball water separator is very important. The mesh plate of the ball water separator is made of 304 stainless steel, which is resistant to corrosion, impact and aging.

3. Glue ball pump and glue ball

The types of glue balls generally used are standard peeling glue balls, ordinary glue balls, and emery glue balls.

(1) Standard Peeling Balls

Standard peeling rubber balls are especially suitable for various condenser copper pipes, and standard peeling rubber balls are also different A rubber ball commonly used in power plants. The rubber ball is made of natural rubber plus foam and special additives. Standard peeling rubber balls can be used in a variety of rubber ball cleaning equipment and water quality.

Peeling gum balls effectively remove biofouling, highly viscous biofouling. Suitable for stainless steel tube and titanium alloy tube heat exchanger.

(2) Ordinary glue balls

Ordinary rubber balls with smooth surface are mainly used for peeling and grinding to make standard peeling rubber balls , Some power plants order light rubber balls because the pipes have no hard deposits, which are generally used for stainless steel pipes. But the effect of using copper pipes is not good.

Mainly used to remove soft dirt, suitable for cooling water applications, silt, slime, mud sand etc. Applicable to copper tube heat exchangers.

(3) Emery Balls

The emery balls are divided into full emery balls and half emery balls. Emery rubber balls are suitable for removing all kinds of pipes with more scale deposits, but they are harmful to the pipes. Generally, they are not used for a long time, especially copper pipes should be used with caution. Effectively remove hard scale, such as: calcium carbonate. Suitable for steel pipe, stainless steel pipe heat exchanger.

The service life of the glue ball

Water cooling tube shell of chiller The main function of the automatic on-line cleaning device for the rubber ball of the type condenser is to wipe off the dirt on the inner wall of the heat exchange tube with the fluid passing through the heat exchange tube when the rubber ball is in the wet state. It is 1~2mm larger than the inner diameter of the heat exchange tube. The driving force for the cleaning rubber ball to move forward is the fluid pressure difference between the front and rear in the heat exchange tube. When the wet diameter of the cleaning rubber ball is smaller than the inner diameter of the heat exchange tube, the cleaning ball has lost its cleaning effect, and a new qualified rubber ball should be replaced.

Replacement of glue balls

When the end difference increases When the amount changes more than 0.3℃, it should be replaced with a new rubber ball or the use time exceeds 5000 hours.

Condenser Ball Automatic To meet the performance requirements of the online cleaning device, on the basis of circulating water treatment, use a standard thermometer to check that the thermometer deviation on the cooling water inlet and outlet pipes of the chiller does not exceed 0.1°C, and test the condensation temperature of the refrigerant in the condenser of the chiller. After the thermometer deviation does not exceed 0.1°C, install the water-cooled shell-and-tube condenser rubber ball automatic online cleaning device for the chiller. The increase of the small temperature difference Δt of the condenser is not more than 0.3℃± 0.1℃.