Several Big Considerations for Enterprises When Using Heating Coolers

In addition to the above-mentioned enterprises, which should arrange for someone to be responsible for the start and stop of refrigerators, switches, and repairs and maintenance. The precautions for the use of refrigerators in enterprises are as follows:

First, the refrigerant leaked
Leakage of refrigerant not only affects the cooling efficiency of the heating and cooling machine, but also affects the health of the personnel involved in the engine room due to leakage of the refrigerant. Therefore, the problem of leakage of the refrigerant must be noticed.

Under normal circumstances, the refrigerant is not a consumable product, so it will not be constantly missing. If it is often or abruptly missing, it is recommended to check whether the refrigerant in the refrigerator is leaking. If there is a leakage problem, the leak should be found in time and make up for leaks, or replace the relevant refrigerant piping and connections. And if necessary, it should perform forced ventilation.

Second, pay attention to the load of the refrigerator
The load on the refrigerator is larger, or it exceeds the rated load, resulting in overload, which will affect more serious problems, including reduction of cooling efficiency, increase of noise, increase of vibration amplitude, excessive consumption of electrical resources, reduced life expectancy and so on. It needs to pay attention!

Third, temperature and pressure
It can be said that the parameters related to temperature and pressure are the most important parameters of the refrigerator. Enterprises should pay attention to the parameters related to the temperature and pressure of the refrigerator. Solve problems in time, and avoid affecting the normal operation of the refrigerator.

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Refrigeration heating cycle device compressor precautions

The performance of the compressor in the refrigeration heating cycle device is very important. When choosing the compressor brand of LNEYA refrigeration and heating cycle device, the compressors of domestic and foreign brand manufacturers are specially selected, the performance is more reliable, but it is necessary to pay attention to the use of the compressor. There are a few things to keep in mind.

The compressor in the refrigeration heating cycle has only one correct connection, and the others are wrong. Due to miswired, the thermal protector may lose the protection function, which may cause the compressor to burn out, which generally causes the secondary coil to burn out. For the three-phase compressor, there must be a phase sequence protection device.

For a refrigeration heating system that is not fully enclosed, the refrigerant may enter the system, and the source of the system may be there. When the copper tube is cut, fine copper chips are generated, and the processing oil, impurities and other foreign materials in the system manufacturing process, and the compressor are long-term. When exposed to air, dust, water vapor enters, and welds, an oxide film is formed on the inner surface of the pipe, so it should be filled with nitrogen gas during welding.

The influence of the residue on the system in the refrigeration heating cycle system will aggravate the wear of the friction surface of the moving parts and block the oil passage of the pump. When the compressor contains tiny inclusions such as moisture, fiber, dust, etc., it may be adsorbed on the motor windings and wiring. On the column, reduce the insulation performance of the whole machine. The processing oil and the like also react with the refrigerant or the refrigerating machine oil to generate sludge and coke, and adhere to the exhaust valve piece, the suction filter, and the capillary to cause clogging.

The refrigeration heating cycle device is recommended to use a closed circulating piping system. There is no water vapor absorption at low temperature, no oil mist at high temperature, and the heat transfer oil can have a wide operating temperature. No mechanical and electronic valves are used in the entire circulation system. 

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High and low temperature cycle machine compressor performance description

The importance of the performance of high and low temperature cycle machine compressors must be known to everyone, then LNEYA reminds users that it is necessary to understand the common sense of the performance of the compressor.

The high-low temperature cycle integrated machine compressor thermal switch and the thermistor are independent of the compressor wiring, and are not directly connected in the compressor circuit. The thermal switch controls the compressor control circuit through the feel of the compressor cover temperature. . The thermistor is a negative temperature characteristic component that has a feedback signal output to the microprocessor. A set of temperature and resistance tables are pre-entered in the microprocessor. Each time a resistance is measured, the corresponding temperature can be reflected in the microcomputer, and then the temperature control is achieved.

After the high-low temperature cycle integrated machine is charged with refrigerant, the electric performance is checked first. After the liquid refrigerant is sealed, the liquid refrigerant charged may condense on the terminal block, and the insulation resistance of the liquid refrigerant is much smaller than that of the gaseous refrigerant. Instantly reduce the insulation level of the whole machine. After operation, the liquid refrigerant evaporates and the insulation returns to normal.

Why does the system have to specify the degree of vacuum? The vacuum degree of the refrigeration heating temperature control system of the high and low temperature cycle integrated machine directly affects the water content in the system. The lower the vacuum degree, the less water vapor remains in the system. If it is not vacuum, it may cause ice blockage of the capillary tube and expansion valve during heating; the acidic environment caused by moisture will aggravate the deterioration of the oil and the burning of the motor; it will erode the parts and have a fatal effect on the compressor. There will be a phenomenon of “copper plating”, which will affect the matching clearance and sealing effect of the parts; severe copper plating will directly lead to the blocking of the parts; the refrigerant will decompose. In the vacuum state, the compressor is strictly prohibited from operating or applying an electric pulse, because in the vacuum state, electrons are easily released, thus generating a discharge. When there is a medium (such as refrigerant or air) between the charged bodies, the electrons are not easily released.

Compressor performance is more critical. LNEYA high and low temperature cycle machine compressors are all branded compressors, both domestic and foreign brands, and can be selected according to specific models.

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Noise description of common faults in high and low temperature integrated equipment

High-low temperature integrated machine equipment may cause malfunction due to improper operation, then how to deal with noise failure of the equipment, and then analyze the noise too high.

The suction of high and low temperature integrated equipment is one of the main reasons for the excessive noise of the hydraulic pump. When air is mixed into the oil, it is easy to form cavitation in its high pressure zone and propagate in the form of pressure waves, causing oil to oscillate, causing cavitation noise. The main reasons are: the oil filter of the hydraulic pump, the blockage of the oil inlet pipe or the high viscosity of the oil can cause the vacuum at the pump inlet to be too high, so that the air penetrates. The oil seal of the hydraulic pump and the pilot pump shaft is damaged, or the inlet pipe is poorly sealed, causing air to enter. The oil level of the fuel tank is too low, so that the hydraulic pump inlet pipe is directly sucked.

When there is high noise in the operation of the hydraulic pump, the above parts should be inspected and the problems should be dealt with in a timely manner. The internal components of the high and low temperature integrated machine are excessively worn, such as the wear and strain of the piston pump cylinder and the distribution plate, the plunger and the plunger hole, etc., causing serious leakage in the hydraulic pump. When the hydraulic pump outputs high pressure and small Flow pulsation occurs when the fluid is flowing, causing higher noise. At this time, the deflection angle of the pilot system variable mechanism can be appropriately increased to improve the influence of internal leakage on the pump output flow. The servo valve spool of the hydraulic pump and the piston that controls the flow will also cause the piston to pulsate during the movement due to local wear and strain, causing fluctuations in the output flow and pressure of the hydraulic pump, resulting in large vibration and noise at the pump outlet. . At this point, the components that are severely worn or strained can be brushed and replaced or replaced.

The hydraulic pump distribution plate is also one of the important components that cause noise. In the use of high and low temperature integrated machine equipment, due to surface wear or sludge deposition on the opening of the unloading tank, the unloading tank will be shortened and the unloading position will be changed, which will cause oil trapping, which will lead to higher noise. In the normal repair process, the flat-repaired distribution plate will also have the effect of shortening the unloading groove. If it is not properly lengthened at this time, it will generate more noise. During the assembly process, the large unloading groove of the distribution plate must be installed in the high pressure chamber of the pump, and its sharp angle direction must be opposite to the direction of rotation of the cylinder block, otherwise it will bring greater noise to the system.

If the equipment has a noise failure, it needs to be solved in time. Once there is noise, it is definitely a malfunction.

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Operation LNEYA high and low temperature cycle machine note

LNEYA high and low temperature cycle machine uses mechanical refrigeration to obtain low temperature heating tube heating to obtain high temperature. It is used with various glass reactors and reactors. What should be paid attention to when using it?

High and low temperature cycle machine is suitable for dynamic constant temperature control of high pressure reactor cold and heat source, dynamic constant temperature control of double-layer glass reactor cold and heat source, dynamic constant temperature control of double-layer reactor cold and heat source, thermostat control of microchannel reactor cold and heat source, small Constant temperature control system, steaming system temperature control, material low temperature high temperature aging test, combined chemical cold source heat source constant temperature control, semiconductor equipment cooling and heating, vacuum chamber refrigeration heating constant temperature control and other industries.

When in use, the wooden box needs to be opened first to install the inlet and outlet valve on the inlet port. The upper and lower sides of the machine are marked with inlet and outlet ports, the valve is a shut-off valve, the valve medium flows in a direction, the valve is marked with a flow direction, and the valve and the reaction kettle are used. The hoses are butted, and the inlet and outlet of the reactor should be kept in and out to ensure that the reactor is kept full of liquid. The high and low temperature cycle machine opens the high and low temperature tank to add liquid holes, and the medium is added into the machine to open the machine's circulation switch, so that the liquid circulates throughout the system. Note that the air in the system is to be evacuated.

When using, turn on the power and press the key to enter the working state. The upper window of the display window displays the measured temperature, the lower window displays the current set temperature, press the set button, the upper window displays 5P, with the △▽ addition and subtraction setting The temperature lower window displays the set temperature. Press the heating button, the indicator light next to the heating button lights up, and the heating starts working. Press the cooling button, the indicator next to the cooling button is on, and the refrigeration compressor starts to work. Note: * When the time is *, the compressor is delayed by about 3 minutes.

The performance of the high and low temperature cycle machine is related to the operation of the entire high and low temperature cycle machine. LNEYA high and low temperature cycle machine has spent more effort in design and configuration to help users to run better.

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High and low temperature circulation tank daily use instructions

During the operation of the high and low temperature circulation tank, some phenomena generated by the LNEYA protection device need to be observed. If some improper sounds and unexpected situations occur, we need to solve it in time.

The high and low temperature circulation tank is not connected to the power switch, forget to turn on the leakage circuit breaker, and turn the leakage circuit breaker to ON. There is no input from the power supply: the fuse is burnt. In order to ensure the safe and reliable operation of the refrigeration system and prolong the service life of the compressor, please pay attention to daily maintenance. Before starting the compressor, pay attention to whether the valve to be opened in the exhaust cut-off valve and its system is in the correct position, and check whether the power supply voltage and ambient temperature are within the specified range. During the operation of the compressor, the suction and exhaust pressure of the compressor should not exceed the range of use, and the operation sound of the compressor should be heard. Except that the intake valve and exhaust valve have clear pouring sound, other parts should not be knocked. When the sound is heard, it is found that the leak should be repaired in time. When the compressor is stopped for a long time, the refrigerant should be recycled to the reservoir and the exhaust shutoff valve should be closed.

The high and low temperature circulation tank adopts a fully closed pipeline design and adopts a high efficiency plate heat exchanger. It is applied to the temperature rise and temperature control of the glass reactor, metal reaction kettle and bioreactor, especially suitable for heat and release during the reaction process. Thermal process control. The high and low temperature circulation tank is applied to the temperature rise and temperature control of the glass reactor, the metal reaction kettle and the bioreactor, and is particularly suitable for controlling the heat demand and the heat release process during the reaction process.

Every accessory in the high and low temperature circulation tank is very important. Once the fault occurs, it needs to be solved in time. In the process of running, pay more attention to the maintenance in time to ensure the efficient operation of the accessories.

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Discussion on maintenance of high and low temperature integrated cycle machine

LNEYA high and low temperature integrated cycle machine is a refrigeration heating equipment produced by the use of refrigeration heating dynamic temperature control technology. The temperature range is from -120 °C to 350 °C. It has superior performance, high precision and intelligent temperature control. It needs regular time when used. Do a good job of maintenance.

The high and low temperature integrated cycle machine exchanges heat or direct contact heat exchange mode to exchange heat of the medium and cool it through the cooling tower to recycle water to save water resources. In general, the circulating water is neutral and weakly alkaline, and the pH is controlled between 7 and 9.5; in the case of circulating cooling water in direct contact with the medium, it is acidic or alkaline (pH greater than 10.0), generally less.

Always check whether the cooling water pipe is connected safely and securely. Is the flow, temperature and pressure of the cooling water suitable? It is recommended to check the water level of the water tank every month. Once the water level drops, it should be replenished in time and only distilled water can be added. In order to prevent the growth of microorganisms or free organic impurities in the water, so as not to impede the flow of water and affect the cooling effect, it is recommended to add a bactericide in the water, and the distilled water in the water tank is replaced at least once a year. The blades of the air-cooled filter and the cooling fan of the compressor should be cleaned every 6 months. After the cleaning is completed, 12 drops of oil should be added to the fan bearing. In order to reduce the impact of scale on flow and cooling capacity, it is recommended to clean the pipeline every 5 years (if it is cooled with tap water every 2 years).

The high and low temperature integrated cycle machine is very convenient to install and move, but it requires a higher working environment because it is cooled by hot air circulation. Therefore, if the ventilation effect of the installation workshop is not good, it will directly affect the cooling effect. In addition, if you want to put the equipment in a dust-free workshop with humidity requirements, then I advise you to modify the water-cooled.

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