The air cooler is a summer refrigeration equipment that has been commonly used by our manufacturers. There are various types of air coolers. If we are careful, we will find that the way the air blows out of the air cooler is different. The air outlet of the air cooler is determined by the air outlet.

    Regarding the air outlet, the air cooler has three different air outlet modes, namely, the bottom air outlet, the side air outlet, and the top air outlet. Among them, the bottom wind is the most commonly used. Which kind of outlet is better? The following analysis of the application of different air outlets for environmentally friendly air conditioners will tell which one is the most suitable.

    1. The most commonly used air outlet type air cooler is the most common, the main reason is because its effect is relatively better than the other two. Compared with the side wind, the chiller at the bottom of the wind has a more wet curtain than it is, and it is self-evident that the effect is good or bad. For the top wind, although it also has four wet curtains, there will be one more elbow when installing, and it is near the air outlet, which will inevitably generate a lot of resistance and greatly affect the work of environmentally friendly air conditioners. effectiveness. Therefore, the opportunity to get out of the wind and cold wind is the most commonly used.

    2. Let's take a look at the side air outlets and the top outlets. Any enterprise that installs the air cooler, the first consideration is the cost of the installation. Although the effect of the bottom air is the best, if the installation of the air-conditioned workshop is located in the middle of the floor, then if you install the bottom air, you have to build a long duct. This will not increase the installation cost, so it is believed that the resistance generated by such a long air duct will not be small, and the effect will be much lower when the wind is transmitted to the workshop. At this time, if the installation side is out of the wind, only one shelf needs to be hung next to the window of the workshop, so that the contrast is obviously good for the side. Let's say that the wind is coming out. If the workshop is on the ground floor, then it will be more worthwhile to install the bottom wind. It is the best choice to install the top wind.

    Finally, make a summary, no matter which kind of air outlet of environmental protection air conditioner, according to the actual situation, the choice is right.

The negative pressure fan is designed using the principle of air convection and negative pressure ventilation. The function is very powerful. It is generally installed outside the shop window, generally chooses the downwind, draws the wind out, and extracts the odor gas; it is mainly used in high temperature or smelly workshops, such as heat treatment plant, casting factory, plastic factory, aluminum profile factory, shoe factory, leather goods factory. , electroplating plants, various chemical plants; and employee-intensive enterprises: such as garment factories, various assembly workshops, Internet cafes; and horticultural greenhouses to cool down the greenhouses, livestock farms to cool down; and especially suitable for places that need to cool down and need a certain humidity: Such as cotton spinning mills, wool spinning mills, weaving mills, chemical fiber mills, warp knitting mills, knitting mills, and other textile mills, warehousing and logistics, including multi-smoke, sultry odor kitchen and canteen. Any machine with improved ventilation can improve the cooling effect by 90%-97%.

1. Agriculture: Negative pressure fans were used in greenhouses for farming, and orchids, or clock plants, used negative pressure fans.

2, animal husbandry: extended by the greenhouse seeds, is the use of animal husbandry. It is well known that the environment of chickens, ducks and pigs directly affects the yield and survival rate. In other words, the quality of the environment is related to the income of livestock.

3, industry: garment factory, shoe material factory, toy hardware factory, etc., negative pressure fans can be seen everywhere in various industrial fields.

4, public places: the common canteen is basically installed negative pressure fan, low cost and high efficiency, but also can improve the dense environment of dense population. There are also some shopping malls, auditoriums, stadiums, stations, hospitals, etc. can be used.

The negative pressure fan has very good effect and high efficiency. The blinds are automatically closed and closed to achieve dustproof, waterproof and beautiful appearance. It can be used for both air blowing and ventilation. It is the best choice for cooling and ventilation in modern workshops. The environmentally-friendly and energy-saving negative pressure fan will become the mainstream of the ventilation and cooling equipment market.

The defrosting of the air cooler plays an important role in the refrigeration process. Because the fins of the air cooler are extremely easy to block, when the fins are frosted, the cooling capacity of the fins is reduced and the cooling effect is affected. So how does the chiller defrosting? Let's look at it together. Ningbo City Air Cooler, Ningbo Air Cooler

   Manual defrost: There is also a balance between labor costs and operating expenses. Due to the different types of goods stored in each refrigeration plant, the packaging situation is different, and the speed of frosting of the pipes varies greatly. Therefore, the time interval of manual defrost can only be determined according to the specific conditions. The scientific practice is to apply the frost layer. The thickness provides a comprehensive and economical defrost cycle by comprehensively analyzing and comparing the operating electricity cost and the defrosting labor cost of the system. The specific analysis idea is that the accumulated operating cost of the frost layer thermal resistance in a reasonable defrost cycle is exactly equal to the labor cost of a defrosting.

   Ethylene glycol defrosting: The refrigerator uses a hot glycol defrosting method, which uses the heat generated by the compressor exhaust to heat and store the glycol in the heat exchanger to the storage tank, and the defrosting is required by the pump (cooling fan) , aluminum tube) evaporator, while closing the normal night, return valve. When the temperature of the evaporator rises, the frosting layer on the surface of the evaporator is melted or peeled off; the pre-cooling tank adopts a hot air melting method, which sends the high-pressure high-temperature gas discharged from the compressor to the evaporator to release the heat and defrost. The method of melting frost is economical and reliable, and the maintenance and management is convenient, and its investment and construction are not difficult.

   Electric defrosting: Electric defrosting is the use of an electric heating tube arranged in the cooling fan to heat the fins to melt the frost layer. This method is simple in system and more convenient in operation. However, the cooling heat exchanger has an electric heating tube of about 40~100W per square heat exchange area, which consumes too much electricity, and has a great influence on the fluctuation of the storage temperature. The power of the frost electric heating tube is very large, the quality of the heating tube is not good or the use time is long, it is easy to burn out or even cause a fire, and the electric heating frost has serious safety hazards.

   Water defrosting: Water blasting is a method of spraying water onto the outer surface of the evaporator by means of a water pump or a water spray device, so that the frost layer is melted by the heat of the water and washed away. Water rushing is a very effective defrosting method because of its simple operation and short time. In a cold storage with a very low temperature, after repeated frosting, the water temperature is too low, which will affect the effect of the frosting; if the frost is not cleaned within the set time, the frost layer may change after the cooling fan works normally. It becomes an ice layer, making it harder to make the next frost.

   Hot working fluid defrosting: The hot working defrosting is a superheated refrigerant vapor with a higher temperature discharged by a compressor. After passing through the oil separator, it enters the evaporator and temporarily uses the evaporator as a condenser, using the hot working fluid. The heat released during condensation melts the frost layer on the surface of the evaporator. At the same time, the refrigerant and lubricating oil originally accumulated in the evaporator are pressurized or gravity-discharged into the defroster drain bucket or the low-pressure circulation bucket by means of the hot working fluid. When the hot gas is defrosted, the load of the condenser is reduced, and the operation of the condenser can also save part of the electric energy. It can be seen that the thermal defrosting is the most economical way of defrosting the air cooler.

The most common fault scene in the use of the air cooler is the occurrence of non-refrigeration, that is, the failure of the internal pump of the equipment. Below we will analyze some common faults and maintenance methods of the submersible pump.

Submersible pumps often encounter problems such as oil leakage, leakage, tripping, tripping, impeller rotation, low flow, low speed, etc. In the following, detailed analysis of these common faults is carried out:

1, the impeller speed is low, the lift can not reach

Many customers found that the actual head was not up to the standard head when they started using the submersible pump that was just bought. The measurement found that the speed was also low. This situation may be incorrect wiring, it is recommended to change the fire line. It is also possible that the submersible pump is inferior and the lift is not reached.

2, submersible pump water supply is weak, small flow

Take out the submersible pump and check that the rotor is flexible and the rotor can be turned on. When the pump was disassembled, it was found that the lower end of the submersible pump was loose between the shaft and the bearing, and the rotor was moved downward, so the rotor was weak and the output power was small. Use a suitable gasket pad between the rotor and the bearing to move the rotor up and install the test machine. The fault can be eliminated.

3. After the power is turned on, the impeller does not turn.

After the power is turned on, the submersible pump has a humming sound, and the impeller does not rotate. Turn off the power and push the impeller at the water inlet. If it does not move, the rotor is stuck. The submersible pump can be disassembled to check whether the ball of the lower end bearing of the rotor is broken and the rotor is stuck; if the impeller can be turned, but the impeller does not rotate after being energized, the cause of the failure may be severe bearing wear, and the magnetism generated by the stator will attract the rotor when energized. Can't turn. Replace the bearing and reassemble the pump. The impeller is flexible and the fault is eliminated.

4, oil spill

The oil leakage of the submersible pump is mainly caused by the serious wear of the sealed box, resulting in oil leakage in the sealed box oil chamber or poor sealing at the outlet box.

When the oil in the sealed box oil chamber leaks, oil traces are visible at the water inlet section. There is a refueling hole at the water inlet section, and the screw is unscrewed to see if the oil chamber is filled with water. If the oil chamber enters the water, the seal is poor. The seal box should be replaced to prevent the oil chamber from entering the water and infiltrating into the motor. If the root of the submersible pump cable is oily, it is a leak in the motor. Generally, the sealing plug is poorly sealed or the lead is unqualified after the motor is re-wound; some are caused by the rupture of the pump terminal block. After the inspection is confirmed, you can change the qualified new product. And measure the insulation degree of the motor. If the insulation is not good, it should be treated in time, and the oil in the motor should be replaced.

5, leakage

Leakage is the most common failure of submersible pumps and one of the most dangerous factors that endanger personal safety. The fault phenomenon is that when the knife is closed, the leakage protector in the transformer power distribution room will trip (if there is no leakage protector, it will be quite dangerous, which will cause the motor to burn out). This is mainly due to the water in the pump body of the submersible pump, which causes the insulation resistance of the motor winding of the submersible pump to decrease, resulting in the action of the protector. At this time, use the R×10kΩ block of the shaker or multimeter to measure the motor winding to have a certain leakage resistance to the outer casing. The long-term use of the submersible pump causes severe wear of the mechanical seal end face, and the water penetrates thereby, soaking the motor winding to form a leakage. The removed submersible pump motor can be placed in a drying room or dried with a 100-200W incandescent bulb; the insulation resistance is measured to be infinite, then the mechanical seal is replaced, and the pump can be put into service.