It is inevitable that the chiller will produce sound when it is working. For example, when the fan rotates, the fan blades rub against the air, it will produce sound. Normal sound is allowed. However, even the sophisticated refrigeration equipment will appear after a long period of use. Fault. Then, the editor of Oumal Chiller will take you to understand the causes and solutions of the noise produced by the chiller.

First, find the reason from the parts that are easy to check and observe:

1. Are the anchor screws loose?

The chiller is fixed on the ground. After running for a long time, the anchor bolts will be loose, and the chiller will be unstable, which will cause noise. This situation can be solved by replacing the anchor bolts, and vibration reduction can also be installed if conditions permit. The purpose is to make the chiller firmly fixed on the ground.

2. Whether the connecting pipeline is firm

There are large and small pipes on the chiller, connecting the chiller, cooling equipment and other auxiliary devices. If the connecting screws are loose, noise will be generated after operation. The solution is to fix the pipes and equipment.

3. Is there any problem with the fan?

The air-cooled chiller is equipped with a fan fan, which is composed of a fan cover and blades. The blades are deformed by external force and will generate noise after rotating. The fan cover will also cause noise due to the entry of dust and debris. Replace the blades and regularly clean the top of the fan. Sundries can reduce noise.

Then we observe whether the following parts have abnormal noise:

4. Whether the water pump makes abnormal noise

The reason for the abnormal noise of the water pump is mostly due to the water quality, which is not clean enough, which causes the water pump pipe to be blocked, causing abnormal noise at work and generating noise. The circulating water needs to be treated to meet the requirements of the chiller.

5. Whether the compressor has abnormal noise

Compressor abnormal noise is a relatively important problem. Because the compressor is the "heart" of the chiller, special attention should be paid to abnormal noise. The main reasons for compressor abnormal noise are as follows:

Reason 1: Liquid refrigerant enters the compressor

Once the liquid refrigerant enters the compressor, because it cannot be compressed, the hydraulic pressure will cause liquid shock to the internal structure, resulting in vibration or noise. In addition, too much refrigerant will dilute the refrigerating oil and cause wear of mechanical parts.

Solution: Check whether there is too much refrigerant, and release excess refrigerant; check the opening of the expansion valve, whether it is too large, and adjust it in due course.

Reason 2: Excessive refrigerant oil causes liquid shock

Solution: Check the condition of the refrigerating oil in the compressor and adjust it to an appropriate amount.

Reason three: abnormal noise of compressor cylinder and crankshaft

Generally, it is caused by the lack of lubricating oil, causing abnormal wear of the internal components of the compressor, causing abnormal noise, and also affecting the operation of the compressor and reducing the service life of the equipment.

When this happens, the compressor needs to be repaired or replaced. It is worth noting that regular inspections of the chiller and compressor condition can effectively avoid this situation.

Some people in the industry have encountered this situation. Due to the poor return of oil in the oil return pipe and the lack of refrigerating oil, the compressor crank sleeve is damaged, which generates louder noise and aggravates wear.

It is normal for a chiller in normal use to have a little sound, but irregular and sudden noises must arouse our attention. Briefly summarize the following reasons for the noise of the chiller: loose connection screws, abnormal noises of fans, fans, and water pumps. , Excessive refrigerant, excessive refrigerating oil.

In the market, there are many screw chillers manufacturers, and the prices of screw chillers with the same cooling capacity vary greatly.

First of all, it depends on the type of screw chiller, whether it is an air-cooled screw chiller or a water-cooled screw chiller. Generally speaking, for the same cooling capacity, air-cooled chillers are more expensive than water-cooled chillers. This is because the COP of air-cooled chillers is lower than that of water-cooled chillers. In addition, the cost of air-cooled chillers is relatively higher than that of water-cooled chillers. Of course, the comparison price cannot be simple. Look at the price of the chiller, because the air-cooled chiller is easy to install and does not need to be used with other equipment. It can be turned on when connected to the power supply and water pipe, while the water-cooled chiller needs to be connected to the cooling tower and the water pump and the water pipe, making it easier to install. Complex, the cost of the entire system should also include these. What are the influencing factors for the price of the same type of chiller?

1. compressor

Compressor is an important factor in determining the price of screw chiller. Compressor is the core component of screw chiller. At present, the commonly used screw compressor brands on the market are: Hanbell, Bitzer, Fusheng, etc. Because the prices and performance of these brands of compressors are different, the selection of different compressors will make the whole screw type water chiller. The price of the machine is different. Hanbell compressor is the most commercially available brand of screw chillers in China. Compared with BITZER screw compressors, the price is cheaper and the performance is good. Of course, if the customer's budget is sufficient, the BITZER compressor brand will also be requested.

2. Type of evaporator

The type of evaporator will also affect the price of screw chillers. Shell and tube evaporators are commonly used in screw chillers. They all use high-quality externally threaded copper tubes, high-strength sealed structures, and strong heat exchange capabilities. Its main material, copper pipe, is also divided into good and bad, so the price will also be biased. In addition, if the chiller needs to take corrosive liquids, the material of the evaporator needs to use a titanium tube evaporator, or nickel white copper evaporator, 316 stainless steel evaporator, so the material of the evaporator is different, and the cost is also different, which naturally leads to The price of the chiller is different. When we confirm the plan with the customer, we must understand whether the liquid that the customer needs to cool is corrosive. Only in this way can a suitable evaporator be matched to avoid unnecessary losses.

3. Control System

The different control systems of screw chillers will also lead to differences in the price of screw chillers. Normally， China Chiller factory uses PUNP control panels for the control system of screw chillers. PUNP control panels also have button-type and touch-screen types. , The price is naturally different, we generally use Siemens PLC control system for customers, which is convenient for customers to program and set by themselves, and also customize according to customer special requirements, such as Omron PLC, WEINVIEW man-machine interface... Oumal Refrigeration is committed to For industrial refrigeration systems, we can customize cooling water systems for customers, and help customers improve product output and quality with preferential chiller prices.

Therefore, when purchasing a screw chiller, you should not only ask about the price of the screw chiller, but also compare the configuration of different screw chillers provided by different chiller manufacturers, so that you can buy the right one at an affordable price. Screw chiller. Similarly, when purchasing a screw chiller, you should also inform the manufacturer of the chilled water temperature used. Because the chiller outlet temperature is different, the chiller model will be different under the same cooling capacity requirement, and the compressor model used Naturally it is different. Omar provides various types of chillers, including: low temperature chillers, glycol chillers, sea water chillers, laboratory chillers, food-grade chillers. To get more chiller prices from OUMAL, please contact us so that you can buy cheap water chillers.

The evaporator is one of the main components of industrial chillers. The types of evaporators include: tank with coil evaporator, shell and tube evaporator, stainless steel plate heat exchanger, titanium tube evaporator. With so many types of evaporators, how should we choose the appropriate type of evaporator for our chiller?

Water tank coil evaporator: The evaporator is a coil type structure placed in the water tank. The coil-type evaporator of Omar Refrigeration is made as follows: According to the size of the chiller required by the customer, the copper pipes are coiled in a circle, and then the coil-type evaporator is put into the built-in water tank of the box-type chiller. In this way, the refrigerant in the copper pipe can absorb the heat of the water. The water tank coil evaporator is relatively simple to manufacture. The cost is relatively low. Generally, small water chillers use water tank coil type evaporators.

Shell and tube evaporator: Shell and tube evaporator is the most widely used in screw chillers, and different materials can be selected according to different water quality requirements. For example, the middle tube can be 316 stainless steel or copper tube, or nickel white copper, and the outer shell can be carbon steel or 316 stainless steel. The shell and tube evaporator has compact structure, convenient operation and management, and high heat transfer coefficient. The disadvantage is that the refrigerant charge is large, and when the evaporation temperature is lower than 0 degrees, it is easy to freeze and damage the evaporation tube.

Stainless steel plate heat exchanger: As one of the commonly used heat exchange equipment in heat exchangers, stainless steel plate heat exchangers have certain advantages. They can be used in food, heating, domestic hot water, waste heat recovery and other fields. The data displayed by the heat exchange equipment shows that the stainless steel plate heat exchanger has a better heat exchange effect than carbon steel, and it also prolongs the service life. Stainless steel plate heat exchangers are generally divided into 316L and 304 materials. 304 stainless steel plate heat exchanger has a wide range of uses, such as corrosion resistance, heat resistance, mechanical properties, and low temperature strength. The use temperature can be (-196℃-800℃). When customers of general chillers have requirements for water quality, we will generally equip chillers with stainless steel plate heat exchangers in the choice of evaporator.

Titanium tube evaporator: The titanium tube is light in weight, high in strength, and superior in mechanical properties. When the chiller is used with corrosive liquids, such as acidic liquids, we need to use a titanium tube evaporator. For example, in the electroplating industry, the electroplating solution is highly corrosive. If the chiller directly cools the electroplating solution, a titanium tube evaporator is required. , Titanium tube evaporator is also commonly used in fish pond chillers.

After reading the main features and uses of various evaporators, do you know how to choose the right evaporator type for your chiller? If you don’t know, please contact us and tell us where your chiller is used and the type of liquid that needs to be cooled. Oumal‘s professional engineers will choose the most suitable evaporator for your water chiller systems.

The air-cooled chiller is one of the chiller models. It cools the water at room temperature to a certain temperature through the compressor of the chiller to strengthen cooling of the mold or machine. It is used as a stand-alone machine. The heat sink is a built-in fan. There are three main mutual Linked systems: refrigerant circulation system, water circulation system, electrical automatic control system.

 

The air-cooled chiller is mainly used to cool the heating components of the equipment to ensure the normal operation of the equipment at a constant temperature. The air-cooled chiller is suitable for high-speed spindles, electric spindles, CNC machine tools, coordinate boring machines, grinders, machining centers, laser marking machines, laser engraving machines, laser welding machines, laser coding machines, laser cutting machines and other equipment. It is also widely used in the following industries.

Injection rubber process: cast film, composite film, blown film, bottle blowing, extrusion, injection molding, compression molding, etc.

Concrete mixing industry cooling and cooling system: beam making field mixing station, track slab mixing station, bridge pier mixing station, etc.

Industrial cooling system for photovoltaic solar industry (wire cutting machine, polycrystalline ingot furnace, PECVD, MOCVD, extended furnace, etc.)

Cooling system for chemical industry: electroplating, reaction kettle, reaction tank, soft water, circuit board, etc.

Cooling system for wallpaper coating industry: wallpaper, printing, coating, embossing, etc.

Cooling system for surface treatment industry: electroplating, coating, optics, oxidation, etc.

 

The air-cooled chiller has compact structure, small size, convenient movement and easy installation. Equipped with two working modes: constant temperature and intelligent temperature adjustment, the mode of intelligent temperature control can be adjusted to the corresponding water temperature as the temperature changes.

 

The working principle of air-cooled chiller:

Oumal air-cooled chillers use high-quality well-known brand compressors: Copeland compressor, Danfoss compressor, Bitzer compressor, microcomputer control panel, PLC control, Emerson, Danfoss and other brand refrigeration accessories, shell and tube type Heat exchanger or stainless steel plate heat exchanger, reliable quality. Contact us to get the air cooled chiller price.

Explosion-proof chillers require all component with electricity to be explosion-proof and will be equipped with an explosion-proof certificate. Explosion-proof chillers are based on standard chillers and are specific explosion-proof measures taken to prevent electrical equipment from igniting the surrounding explosive gas environment. It is an integral explosion-proof system. In addition to the explosion-proof performance of all electrical components, it must also consider the overall explosion-proof performance of the unit to meet the standard requirements. It provides a comfortable and safe production environment for people in explosion-hazardous places (in addition to the performance of the product itself, the safety guarantee also depends on reasonable selection, correct use and maintenance).

 

Explosion-proof chillers are mainly used in chemical, ink printing, dusty environments, oil refining, petrochemical and other flammable and explosive industries that require protection.

 

The explosion-proof chiller can be an air-cooled chiller or a water-cooled chiller. Depending on the compressor, it can be a scroll chiller or a screw chiller. The refrigeration capacity of Oumal's explosion-proof chiller ranges from 1 RT to 400 RT, which can be customized according to customer requirements. It can pass water at room temperature through the chiller refrigeration system to provide a certain temperature to strengthen the cooling of the mold or machine, and use it as a stand-alone machine. It mainly has three mutually cooperating systems: refrigerant circulation system, water circulation system, and electrical automatic control system. Oumal's explosion-proof chiller uses well-known brand compressors to ensure the quality of the chiller. To get the price of the explosion-proof chiller, please contact us. Will provide the high-quality explosion-proof water chiller with best price.

There are many types of industrial chillers. When purchasing a chiller, different chiller suppliers make different chiller solutions. Therefore, customers need to face choices in the process of purchasing chillers. How can they choose a suitable chiller Suppliers?  Are there any problems that we need to pay attention to when purchasing chillers? The following Oumal chiller manufacturer will take you to analyze together.

First of all, when purchasing a chiller, it is necessary to know whether it is an air-cooled chiller or a water-cooled chiller, whether the chiller model recommended by the supplier meets your requirements, whether the cooling capacity is sufficient, and whether the power supply voltage matches , If different chiller suppliers have different prices, we compare air-cooled chillers with water-cooled chillers, it will be difficult to choose a suitable supplier. Because the price of water-cooled chillers is cheaper than that of air-cooled chillers. The same water-cooled chiller also distinguishes the difference between the box-type chiller ( Packaged water cooled chiller)  and the open-type chiller.

When comparing the price of the chiller of the same scheme, we can't see the low price and choose the low-priced supplier. We must compare the configuration of the chiller. First of all, the compressor is the core component of the chiller, and the brands of compressors are different. , The price is naturally different. We can’t just look at the compressor brand as a well-known brand to determine that the quality of this chiller is high, and other accessories should be balanced, including pump brand, pump material, pump pressure, evaporator type and evaporator material, condenser, fan , And the control panel. Take the screw chiller for example, the control panel has a button type, LCD Touch Screen, PLC Controller, and different control systems, resulting in different costs for the screw chiller.

Secondly, the after-sales service of the chiller is also worthy of our attention. Whether the manufacturer of the chiller is professional, whether there are professional service personnel, and the time of the after-sales service are all factors that we need to consider when purchasing the chiller. The production time of the chiller, payment method, price terms, each difference will lead to the different price of the chiller. Only by choosing a supplier that suits our positioning can we get quality service at a preferential price.

Oumal chiller has favorable price, high-end configuration and professional technical team. It is a trusted chiller supplier in China. If you want to purchase a chiller, please contact us, Oumal will make the best chiller solution for you with best price .

As we all know, the application of industrial chillers is very wide, of which chillers are the most widely used in the plastics industry. So, why does the plastics industry need to use water chillers, and where do they need to use water chillers in the plastics industry?

We know that a chiller is a kind of refrigeration equipment that cools water and recycles it. In plastic production, the high temperature easily affects the molding of plastic products. The chiller can be used to cool down injection molds and improve the quality of plastic products. So which plastic machinery needs to use a chiller? Below, Omar Refrigeration will take you to understand the application of chillers in the plastics industry.

Injection molding machine: In the injection molding process of plastic products (televisions, computers, washing machines, mobile phones, refrigerators, air conditioners, plastic toys, automotive plastic parts, etc.), whether the product can be cooled (cooling down) in a timely and effective manner will directly affect the appearance of the product And shape qualification rate, which affects production efficiency, production costs and corporate profits.

Air cooled chiller is easy to install, and widely used in the injection molding machines. If you want to use one chiller to provide chilled water for several injection molding machines, the water-cooled screw chiller for central water chiller is a good choice.

Plastic Extruder machine (Sheet Extruder Machine ): Extruder extrudes pipes, trunking, cables and various plastic profiles. The heated and melted raw materials are cooled by a freezing water bath after being molded by the mold, and the water temperature in the freezing water bath must be kept constant. Due to the high production speed, large cooling capacity units are required for the surface. If the existing frozen pool is large enough, the unit may not be equipped with a water tank.

Bottle blowing machine: mainly produces all kinds of mineral water bottles and soda bottles. Compressed air drying-clean, dry compressed air is required for blowing, and the water in the compressed air can be removed by using the frozen water provided by the industrial chiller as a cold source. Also chiller used in other machines like Compression molding machine, stretch film machines, cast film machine, cup making machine, plastic forming machine, cup making machines, cup lid machines, cup forming machines, sheet machine and so on.

Oumal Chiller specializes in the production of chillers for the plastics industry, including air-cooled chillers, water-cooled chillers, screw chillers, etc. The appropriate chiller model is selected according to the size of the customer's machine.

Ultrasonic cleaners also called Ultrasonic cleaning machines, are widely used in surface spray treatment industry, machinery industry, electronics industry, medical industry, semiconductor industry, watch jewelry industry, optical industry, textile printing and dyeing industry. Other industries, etc. Compared with other cleaning, ultrasonic cleaning machine has the advantages of high cleaning rate, less residue, short cleaning time, and good cleaning effect. Ultrasound has a cleaning effect on all parts to be cleaned that can be immersed in liquid. It is not limited by the surface shape of the cleaning parts, such as deep holes, slits, and grooves. Can be cleaned.

In our country, the military electronics complete machine factory has begun to promote, and has received the double benefits of not only improving product reliability, but also reducing the cost of after-sales service. In the production of connectors, connectors, adapters and other devices, they must also be cleaned before electroplating and assembly, otherwise the dust and oil adsorbed on these assembled parts will inevitably affect their conductivity and insulation performance, especially some complex multi-core This is especially true for connectors.

Why do ultrasonic cleaning machine need to be equipped with industrial chillers?

The ultrasonic cleaning machine is equipped with a chiller mainly to reduce the temperature of the tank body when the ultrasonic cleaning machine is working, and effectively prevent the cleaning agent from volatilizing.

As long as it is a gas-phase ultrasonic cleaner or an ultrasonic cleaner that uses a solvent-based cleaning medium, it must be equipped with a chiller.

Solvent-based cleaning media are relatively volatile, and the cleaning fluid is easy to volatilize at high temperatures. If a chiller or cooling device is not equipped, the solvent volatilizes faster.

The special smell of solvents will also be emitted. Many solvent-based cleaning media are toxins, which is not conducive to the health of equipment operators.

How to choose a chiller for an ultrasonic cleaning machine?

The following factors need to be considered when the ultrasonic cleaning machine is equipped with a chiller:

1. The power of the heating tube

2. The power of the ultrasonic

3. The organic matter, toxic, needs to be used for volatilization

4. The cleaning fluid is more expensive and needs to be used for volatilization.

Such as: enclosed optical ultrasonic cleaning machine, 17-slot automatic resin optical lens cleaning machine, optical glass ultrasonic cleaning machine, these three kinds of ultrasonic cleaning machines need to use chillers.

Selection formula: (heating tube power + ultrasonic power) x safety factor, the safety factor is generally 1.2.

Ultrasonic cleaners special chillers generally require clean water quality. Therefore, when we are equipped with chillers, we need to use 304 stainless steel or 316 stainless steel for the water pump, water tank, pipes and pipe fittings of the chiller. If you are looking for water chiller for you ultrasonic cleaning machine, please call at +86 15112554736 to get the best price.

During the use of the chiller, sometimes freezing occurs, and the chilled water malfunctions and alarms. The evaporator is one of the four core components of the chiller, and its importance is self-evident. Once it fails, the chiller will also go on strike. Today we will talk about the more common evaporator failures, namely Icing, to analyze the cause and find a solution. Why does the chiller freeze? How to eliminate the icing failure of the evaporator?

1. Look at the type of chiller, whether it is a low-temperature Chiller machine or a room temperature chiller machine.

For low-temperature chillers, use antifreeze instead of water. Such as Glycol.

A normal temperature chiller uses water for circulation. The temperature of this chiller is generally set at 5 degrees. The factory has set it before leaving the factory. Of course, you can set it yourself. If the temperature is too low, it will freeze. If the temperature of the medium and high temperature chiller is lower than 5 degrees without adding antifreeze, it is easy to cause the evaporator to freeze and cause the chilled water failure alarm.

2. See if the chiller is installed with a temperature sensor

The temperature probe will work in coordination with the control board. When the temperature is too low, the temperature probe will tell the main board that the main board will sound an alarm and stop automatically, so there will be no icing.

3. Insufficient refrigerant

During the use of the chiller, refrigerant leakage or blockage will occur. After the refrigerant is reduced, the evaporation pressure will be too low, causing the evaporator to freeze. The location of the icing is sometimes in the evaporator. If the refrigerant leaks, The method of elimination is to deal with the leaking part first, add enough refrigerant, and the fault will be eliminated. If the expansion valve is blocked, replace the expansion valve with a new one.

OUMAL CHILLER Supply all kinds of chillers, such as low temperature chiller, industrial chiller, Brine chiller, screw chiller, glycol chiller……If you are looking for a cooling water system, contact us. Will provide you the best chiller solution with good price.

Both air-cooled screw chillers and air-cooled scroll chillers are air-cooled chillers. Air-cooled chillers use air cooling, eliminating the need for cooling towers, cooling water pumps and piping systems that are essential for cooling water systems. Areas with poor water quality cause condenser fouling and water pipe blockage, and also save water resources. It is the most economical and simple model for maintenance and repair of cold water air-conditioning equipment.

 

Advantage:

Functionally: The air-cooled screw chiller and the scroll chiller have the same refrigeration function. Refrigeration, heating, heating, and energy are all electric energy.

Application industry: Du Shi is mainly used in industries such as industry, medicine, food, coal, and shopping malls.

 

Comparison of unit characteristics:

The air-cooled screw chiller is named air-cooled screw chiller because of its key component-the compressor adopts a screw type. The state of the unit from the evaporator is a gas refrigerant; after adiabatic compression by the compressor, it becomes a high temperature and high pressure state. The compressed gas refrigerant is cooled and condensed at equal pressure in the condenser, and then changes into a liquid refrigerant after condensation, and then expands to a low pressure through a throttle valve and becomes a gas-liquid mixture. Among them, the liquid refrigerant under low temperature and low pressure absorbs the heat of the substance to be cooled in the evaporator and becomes a gaseous refrigerant again. The gaseous refrigerant re-enters the compressor through the pipeline to start a new cycle. These are the four processes of the refrigeration cycle. It is also the main working principle of the screw chiller.

 

The air-cooled screw chiller adopts the international brand screw compressor, and is equipped with high-quality and high-efficiency copper pipes to make the condenser, evaporator and world-famous control components, so that the unit has small size, low noise, large energy, long life, and easy operation And other advantages, its beautiful and exquisite shape design and reliable and stable high-performance quality are outstanding among similar products!

 

Features of air-cooled screw chiller:

1. Semi-hermetic screw-type high-efficiency compressor, with single-machine system and dual-machine system options, compact unit structure. Easy to maintain; adopt a new 5:6 screw rotor design, stable operation, high efficiency and energy saving.

2. Advanced intelligent defrosting method, microcomputer control analyzes the temperature of each point at any time, optimizes the defrost cycle time, and ensures that the defrosting in time does not affect the normal operation of the equipment.

3. Professional motor cooling device. Meet the harsh operating conditions.

4. Using a new generation of high-efficiency heat exchange tubes, the heat transfer coefficient can be increased by 5%. The double groove tube sheet design and advanced tube expansion technology make the structure more sealed and reliable, and completely avoid the possibility of mutual penetration.

5. Generally, no water pump is installed in the unit, and there is no water tank, so an external water tank is needed for circulation.

 

The air-cooled scroll chiller is called an air-cooled scroll chiller because its compressor uses a fully enclosed scroll compressor, and the condenser uses a finned fan. The scroll air-cooled chiller has a cooling capacity from 27.8kW to 284.5kW and a heating capacity from 29kW to 303.5kW, which can meet the different load requirements of various occasions. The unit has a compact structure, small floor space, simple pipeline design, only requires an external water pipe, and is easy to install and maintain. The machine components are integrated and modular. The modular unit is assembled from 2 to 8 modules and has the characteristics of large cooling capacity, mutual standby, and gap operation.

 

Features of air-cooled scroll chillers

1. The unit has a compact structure, small floor space, simple piping design, only requires an external water pipe, and easy installation and maintenance.

2. Intelligent control, the unit can automatically adjust the output of the compressor input according to the load change, so that the unit can maintain the best coordination with the highest efficiency at any time.

3. Use imported fully enclosed scroll refrigeration compressor. It has the advantages of high efficiency, low noise, low vibration, reliable operation and long life.

4. The microcomputer control system is adopted, which has powerful functions of safety protection, communication, fault judgment, automatic adaptation, etc.; it can automatically monitor various parameters and operating conditions of the unit during operation.

5. The machine components are integrated and modular. The modular unit is assembled from 2 to 8 modules and has the characteristics of large cooling capacity, mutual standby, and gap operation.

6. Provides multiple protection functions such as high and low pressure protection, freezing water anti-freezing protection, power phase sequence protection, lack of phase protection, insufficient water flow protection, compressor motor overheating, etc.

7. The box structure of the whole machine shell is beautiful in appearance and compact in structure. The operation of the unit can be checked at any time; the unit can have its own water tank and circulating water pump according to the cooling capacity, without cooling tower and cooling water pump, installation and maintenance are simple and convenient;