NKK Switch S-7A

07/28/2020

Overview of refrigeration compressor classification

The compressor is the core equipment in the refrigeration system. Only by converting electrical energy into mechanical work and compressing low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gas can the refrigeration cycle be ensured

01/10/2021

Auto repair case Air conditioner compressor does not work after Mitsubishi Pajero overhaul Vehicle Information

Auto repair case Air conditioner compressor does not work after Mitsubishi Pajero overhaul Vehicle Information The Mitsubishi Pajero off-road vehicle uses a 6G72 engine. The air-conditioning compressor does not work after the car is overhauled and t器2䀀
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01/08/2021

How Air Conditioners Work

Air conditioners use refrigeration to chill indoor air, taking advantage of a remarkable physical law: When a liquid converts to a gas (in a process called phase conversion), it absorbs heat. Air conditioners exploit this feature of phase conversion by fo器2䀀
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08/20/2020

How to prevent high temperature alarm of industrial chiller

In the hot and hot summer, the frequency of use of industrial chillers is the highest in a year, and summer is also the season when industrial chillers have the most frequent high temperature alarms.

08/17/2020

Five elements for safe use of liquid ammonia refrigeration equipment

In recent years, liquid ammonia leakage accidents have occurred frequently, leading to many tragedies. In order to prevent similar accidents, the editor of okmarts.com today takes everyone to understand the five major elements that need attention in the u碌7館2䀀締眪湠眷VV㠠ǝ

08/02/2023

Step-by-Step Guide: How to Fix Heat Pump Freezing Up in Winter

A heat pump is an essential component of your HVAC system that helps regulate indoor temperatures during the winter months. It is designed to work efficiently even in sub-zero temperatures, but sometimes, it may freeze up, causing discomfort and inconvenience.

03/05/2024

Servo Motor Heat Dissipation: Overheating Reasons and Solutions

Servo motor overheating has always been a headache and is an important factor causing motor shutdown and not to work consistently. How to solve the overheating problem of servo motors should start with source analysis.

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.

06/29/2020

Suggestions for troubleshooting of compressor with liquid start

04/18/2023

How a Refrigeration Compressor Works

The refrigeration compressor is the core component of the refrigeration unit, and plays a decisive role in the running performance, noise, vibration and service life of the system.