SMC Sensor PSE564-02-28-C2

06/22/2020

Working principle of steam compressor_steam compressor application

Working principle of steam compressor_steam compressor application Working principle of steam compressor After the steam is filtered by the filter, clean steam then enters the host cavity through the intake valve, and the volume of the cavity changes from large to small to compress the steam. The volume of the cavity is changed by the rotor rotating under the drive of the motor. <img src="{{media url=&quot;Working_principle_of_steam_compressor_steam_compressor_application.jpg&quot;}}" alt="" />

08/07/2020

Matters needing attention when installing rock wool board in cold storage

In order to allow us to eat the food we want at any time, many businesses have their own cold storage, or have installed a semi-hermetic refrigeration compressor, through which the food can be well preserved.

06/20/2020

What are the causes of air conditioning trip

What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire. 　　Here are two formulas involved: 　　①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required. 　　② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current. 　　 So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit. 　　 Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle. 　　 2. Leakage 　　During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip. 　　Why does the electric leakage cause the MCB to trip? There are two situations. 　　 ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close. 　　②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open. 　　How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter. 　　 ① Measure the voltage at the input and output to see if there is a significant change in voltage drop. 　　②Measure whether the output current exceeds the standard. 　　 So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.

06/25/2020

Talking about the working process and working principle of screw compressor

Screw compressors, also known as screw compressors, are divided into single screw compressors and twin screw compressors. The single-screw compressor was developed by Sinn of France in the 1970s. Because its structure is more reasonable, it is quickly applied to the field of national defense and protected by the developing country.

06/29/2020

Several causes of compressor burning

07/08/2020

For cold storage to be more energy efficient, this should be done!

For cold storage to be more energy efficient, this should be done! 1. The index for reducing the unit heat flow of the cold storage enclosure structure. In the design of the cold storage, the unit heat flow q of the outer wall of the low-temperature cold storage is generally about 11.63W. If the q can be reduced to 6.9W, for a 5000T~10000T class In low-temperature cold storage, it is estimated that the power cost can be reduced by about 10%.

08/05/2020

Common refrigeration phrases in cold storage

1. Refrigeration: The process of absorbing heat from a space or object below the ambient temperature and transferring it to the surrounding environment

07/29/2020

Pressure controller use and adjustment

Many pressure controllers are used in the refrigeration system, and the pressure is controlled by the on and off of the contacts. Mainly include high pressure pressure controller, low pressure pressure controller, high and low pressure pressure controller, pressure difference controller and oil pressure protection pressure controller.

09/11/2020

Radial bearing

Radial bearing: Rolling bearing mainly used for bearing radial load, its nominal contact angle ranges from 0 degrees to 45 degrees. According to the different nominal contact angles,

07/16/2020

Identify true and false filter elements

Look at the filter material. The main filter material of the air filter is filter paper. At present, the filter filter paper mainly uses domestic paper and imported paper. Both domestic and imported paper have good filtering performance, and the inferior filter paper used by the fake filter element cannot prevent dust from entering the engine.