How to clean air control system?

In order to respond to the requirements of the two types of society in the country, environmental protection and conservation have become increasingly important. Therefore, in order to extend the life of the product, it is still necessary to have some knowledge of maintenance, and the most important thing to maintain is to say clean. Here, Guanya Refrigeration introduces some small methods for cleaning the air cooling system.

More traditional methods are scraping and brushing. Sweep the place where you need to clean and the brush. The dirt that cannot be easily wiped off can be scraped with a sword. The second step is to use high-pressure water or chemical cleaning (mainly pickling), only to get high-pressure water or chemical water in the place where there is dirt to carry out chemical reactions, so that the dirt can be off.

However, this more traditional method does not generally clean thoroughly, and cleaning with chemical water may also cause corrosion to the equipment and damage the machine. After the chemical waste has been washed away, it will take a lot of money to process it. Therefore, cleaning agents can be used. This is also relatively environmentally friendly, safe, and thorough in cleaning. Generally, oxidation does not occur, which is beneficial to the service life of the air cooling system.

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Refrigeration heating machine pipe description

When the refrigeration and heating integrated machine is running, the user will find out whether the fully enclosed pipeline affects the overall performance of the equipment. The LNEYA refrigeration and heating integrated machine adopts a fully closed circulation pipeline, and there is no oil mist and water vapor generation when operating at high and low temperatures. What is the importance of piping design by continuously improving the operating efficiency of the refrigeration and heating machine?

The refrigeration and heating integrated machine adopts a fully enclosed pipeline design and adopts a high-efficiency plate heat exchanger to reduce the demand for thermal fluid and improve the heat utilization rate of the system to achieve rapid rise and fall temperature. The heat-conducting medium is in a closed system with an expansion vessel. The heat-conducting medium in the expansion vessel does not participate in the circulation. Whether it is high temperature or low temperature, the temperature of the expansion tank is normal temperature to 60 degrees, which can reduce the absorption and evaporation of the heat-conducting medium during operation. risk.

After installing the compressor welding pipeline, the refrigeration and heating integrated machine should keep the whole system clean and avoid the accumulation of other impurities such as welding slag inside the refrigeration and heating integrated machine system, resulting in serious failure during compressor operation. Vibration is inevitable during operation. In order to reduce the vibration of the pipeline, it is recommended to use copper pipes as suction and exhaust pipes. This allows the copper tube in the line to reduce vibration during normal operation of the compressor. If the pipes in the system are to be steel pipes, proper welding techniques are important to avoid stresses in the piping system. These internal stresses cause resonance and noise, which will reduce the life of the compressor.

After the welding and heating machine is finished, the oxidized impurities and debris generated in the pipeline due to the welded pipe shall be removed in time. If these impurities enter the compressor, the oil filter may be blocked and the lubrication system and the capacity adjustment system may be invalidated. If the suction and exhaust flanges of the compressor are made of cast steel, they can be directly welded to the pipe. After welding, it should be cooled in the atmosphere, and water should not be cooled.

LNEYA refrigeration and heating machine and other equipment in the overall performance of the above is a certain difference, different manufacturers of equipment in the price and configuration is different, so you need to pay attention to a price of a shipment.

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High and low temperature integrated machine equipment blockage instructions

If the high and low temperature integrated machine equipment is running for a long time, if it is not taken care of, it may cause the high and low temperature integrated machine equipment to be blocked. How to solve the equipment blockage?

The first thing to do is to disconnect the power supply of the equipment, open the process pipe nozzle on the compressor, disconnect the return pipe connected to the compressor of the equipment, install the repair valve, and seal it with the welding tool. A small length of copper tube tail on the low voltage side. Then disconnect the connection between the dry filter and the capillary, disconnect the compressor from the evaporator, and install a repair valve at the evaporator inlet. Charge the refrigerant from the return pipe into the evaporator and discharge it from the capillary. When the refrigerant is discharged, the charging is stopped. At this time, the dried ammonia gas is injected into the evaporator from the return pipe at a pressure of 1 MPa, so that the high-pressure brick-mixed ammonia gas is discharged from the capillary together with the refrigerant, and the charging is stopped after the cooling of the capillary port is not fogged. Ammonia. Because the dry ammonia gas has the function of absorbing moisture, it absorbs the moisture in the evaporator and the capillary, and brings the moisture out of the system with the circulation, and the refrigerant has the lipophilic property, and can be accumulated by using this characteristic. The refrigeration oil and other impurities in the pipeline are also discharged out of the system along with the cycle.

Separating the compressor of the high and low temperature integrated machine from the condenser, and installing a repair valve at the condensing inlet, charging the condenser with the refrigerant, and discharging it from the drying filter port. When the refrigerant is discharged from the filter port to be dried , stop charging. The high-pressure dry ammonia gas of 1 MPa was injected from the repair valve to the condenser, and after 2 minutes, when it was confirmed that no dirt and moisture were discharged, the dry ammonia gas was stopped and the ammonia gas cylinder valve was closed. The purpose of this is to extract moisture from the condenser and to release the oil from the system.

First connect the condenser return port of the high and low temperature integrated machine equipment to the compressor process port, and solder it with silver electrode, and then replace the dry filter. At the same time, it is injected from the compressor process port, and then soaked into the soap water. By observing whether there is a bubble, the weld of the whole system is leaked. If there is a bubble, the ammonia gas is released and re-welded with the silver electrode. Repeat the above inspection procedure for injecting gas to observe the bubbles until no bubbles emerge and there is no leakage.

Connect the pressure vacuum gauge to the compressor process nozzle of the high and low temperature integrated machine. The valve head is connected with the vacuum pump by the pressure hose. The vacuum is applied to the system for about 1 hour. The pressure in the system drops to -0.1. When the pressure is below MPa, stop vacuuming, close the pressure gauge valve, remove the vacuum pump, connect the refrigerant cylinder, and charge the system with gas in the form of gas. When the charge reaches 80% of the total amount, stop charging and connect. On the power supply, start the compression. After 10 minutes, refill the refrigerant until the required total amount is reached. Then test the machine for more than 3 hours to see if there is any blockage. Is the temperature drop inside the box normal? If it is normal, the process tube can be used. The mouth is sealed.

The blockage of the high and low temperature integrated machine equipment is solved according to these steps, and the equipment also needs regular maintenance and maintenance to make the equipment run more efficiently.

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About high and low temperature cycle machine refrigerant selection instructions

In the operation of high and low temperature cycle machines, the presence of refrigerant is essential, and the environmentally friendly mixed refrigerant used by LNEYA is better in terms of performance.

The high and low temperature cycle machine has a higher critical temperature and can undergo a phase change at normal temperature or normal low temperature, which is a basic requirement for the refrigerant in the steam high and low temperature cycle machine. High and low temperature cycle refrigerant suitable for saturated vapor pressure. Do not lower the evaporation pressure below atmospheric pressure to prevent air from leaking into the refrigeration system. The condensing pressure should not be too high to avoid excessive increase of high and low temperature cycle machines and equipment. At the same time, the ratio of the condensing pressure to the evaporation pressure should not be too large, so that the gas temperature is too high at the end of the compression and the gas transmission coefficient of the compressor is lowered.

The refrigerant solidification temperature is low to prevent the refrigerant from solidifying at the evaporation temperature. The viscosity and density are small to reduce the flow resistance loss of the refrigeration system. The high-temperature cycle machine has a high thermal conductivity to increase the heat transfer coefficient of the heat exchanger and reduce the heat transfer area and metal material consumption.

The refrigerant adiabatic index is small, which can reduce the power consumption of the compression process. At the end of the compression, the gas temperature is not too high, and the liquid heat capacity is small. The loss of the throttling process can be reduced, and the thermal perfection of the cycle is as large as possible. It does not burn, does not explode, is non-toxic, does not corrode to metal, does not have chemical action with lubricating oil, does not decompose under high temperature and is harmless to human body.

There are many types of refrigerants for high and low temperature cycle machines. The refrigerants used by different manufacturers are different. It is recommended that users choose environmentally friendly refrigerants better, energy saving and environmental protection.

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Description of compressors in various high and low temperature cycle machine industry

In the pharmaceutical and chemical industry, the application of high and low temperature cycle machine is relatively common. LNEYA high and low temperature cycle machine compressors use Emerson, Taikang, Duling and other brand compressors, but the types of compressors are more. We need to have a clear understanding of these in order to run better.

The screw type high and low temperature cycle integrated machine compressors are all volumetric refrigeration compressors, which can be further divided into reciprocating compressors and rotary compressors. The reciprocating compressor uses a piston, a crank, a link mechanism or a piston, a crank, and a slide tube mechanism, and the rotary compressor uses a shaft crank mechanism.

Refrigeration heating cycle

The compressor can be divided into low-temperature, medium-low temperature and ultra-low temperature compressors according to the application range. Low-temperature compressor (evaporation temperature -35 ~ -15 ° C), generally used in food freezer, etc.; medium and low temperature compressor (evaporation temperature -20 ~ 0 ° C), generally used in refrigerators, etc.; ultra-low temperature compressors ( Evaporation temperature -5 ~ 15 ° C), generally used in dehumidifiers, heat pumps and so on.

Application of high and low temperature cycle machine compressor: piston compressor is relatively old, and many places are used in cold storage, refrigeration equipment, ultra-low temperature equipment; rotary compressors are mainly used in refrigeration equipment; scroll compressors are mainly It is used in low-temperature equipment and refrigeration units; screw compressors mainly have relatively large refrigeration capacity, and are used in cold storage and high-low temperature cycle integrated units; centrifugal compressors have larger refrigeration capacity. Generally used in high and low temperature cycle integrated units.
As seen from the above, there are many types of compressors. LNEYA high and low temperature cycle machine compressors are undoubtedly piston type, scroll type, screw type, etc., users can rest assured in performance. All branded compressors are efficient and stable.

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LNEYA Introduction

LNEYA applicable industry

Energy-efficient high and low temperature circulation box description

With the efficient development of the pharmaceutical and chemical industry, environmental pollution is also the subject of more attention. To this end, LNEYA actively responds to environmental protection, produces energy-efficient and high-temperature circulating boxes, and saves enterprise costs as much as possible.

The high and low temperature circulation box group reduces the condensation temperature under the premise of evaporation temperature. In order to meet the safety and production requirements of the equipment, the evaporation temperature is lowered to reduce the condensation temperature, so as to ensure the cooling water efficiency and increase the transformation. Adjust the reasonable operation of the chiller equipment. When the equipment is safely operated, the cooling unit operates at 70%-80% load ratio and runs at 100% load, and the power consumption per unit of cooling capacity is smaller. In this way, it is necessary to combine the operation of the water pump and the cooling tower.

Prevent and reduce pipe fouling to improve the heat exchange efficiency of the condenser and evaporator. Replenish water If the water treatment is not good, calcium carbonate and magnesium carbonate produced by the heating of calcium bicarbonate and magnesium bicarbonate will deposit on the pipeline. Decreasing the thermal conductivity, affecting the heat exchange efficiency of the condenser and the evaporator, and greatly increasing the electricity cost of the equipment. In addition to the water treatment technology, it is also possible to use the pipeline automatic cleaning equipment for pipeline cleaning. The high-low temperature cycle box group refrigerator frequency conversion device adjusts the speed of the centrifugal refrigerator compressor. After the low-pressure refrigerant passes through the centrifuge, the pressure rises. The higher the speed of the centrifuge, the higher the pressure rises. In actual operation, most of the equipment is running at a non-full load. A fixed-speed centrifuge wastes energy when the equipment is running at a small load. The variable frequency centrifugal chiller can automatically adjust the compressor speed according to the change of the load, and the energy saving space is relatively large.

These operating instructions can help the high and low temperature circulation box to be more energy efficient and use as much energy consumption as possible.

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Why choose LNEYA?

LNEYA Introduction

Description of high and low temperature circulation tank refrigeration process

In the process of using high and low temperature circulating tanks, there may be some minor problems due to improper use, and there may be problems in the refrigeration process of Wuxi Guanya high and low temperature circulating tanks, and then we will explain them.

Most high and low temperature circulating tanks cool the media for cooling, but some simple techniques that rely on air or water contain a cooling coil that regulates temperature. The high and low temperature circulation tanks are used as a closed loop system for complete packaging, including hot and cold water units, condensers and circulation pumps, high and low temperature circulation tank expansion valves, partial cold water tanks, and temperature control stations. The closed loop industrial screw high and low temperature circulation tank recirculates water cooling equipment and instrument cleaners at constant temperature and pressure, increasing stability and repeatability.

If there is a high temperature difference between the two, the large external tank will be used to store cold water. In this case, the cooling water does not go straight from the cooler application, but goes deep into the outside of the tank as a "temperature buffer sorting behavior. The cold water tank is much larger than the internal water tank. Cold water from the external fuel tank application And returning hot water from the application can be traced back to the external fuel tank, not to the unit.
One of the new developments in high and low temperature circulating tanks is air cooling, not the use of cooling water. In this case, the condenser is not cooled with hot air refrigerant, but is used by a cooling water cooling tower. This development allows for more than 15% and allows for a reduction in energy demand in the cooler due to the small area of surface water, condensers and fans. In addition, the fans allowed a significant reduction in noise levels.

At the same time, the high and low temperature circulation tanks also need to pay attention to the usual maintenance work, so that the high and low temperature circulation tank can exert a large operating power.

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Why choose Lneya?

LNEYA refrigeration industry

LNEYA Introduction