Copeland Compressor ZF49K5E-TWJ-951

07/07/2020

Earth Hour: Hitachi Central Air Conditioner works with you to speak for the earth

07/23/2020

Reasons for excessively high discharge temperature of refrigeration compressor (technology sharing)

The refrigeration compressor is the core and heart of the refrigeration system. The capacity and characteristics of the compressor lead to the capacity and characteristics of the refrigeration system. In a sense, the design and matching of the refrigeration system is to reflect the capacity of the compressor.

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.

08/13/2024

16 Common Faults and Troubleshooting Methods of Cold Storage Refrigeration Equipment

[Fault analysis] After the refrigerant leaks in the system, the cooling capacity is insufficient, the suction and discharge pressures are low, and a much larger intermittent "squeaking" airflow sound can be heard at the expansion valve than usual.

02/13/2024

A Comprehensive Guide to Parts of a Furnace

When winter arrives and the chill sets in, a reliable furnace becomes a crucial component of any home's heating system.

09/05/2020

What role does air compressor play in washing equipment and how to use it safely

Generally, you need to buy an air compressor to open a laundry room, so how big an air compressor should be configured in a general laundry room? This is the concern of the owner of the investment laundry room

09/09/2020

The importance of informatization development of gas storage tank

The technological development of gas storage information technology is to enable enterprises to have better management, and such management is for the better development of enterprises.

09/10/2020

What problems should be paid attention to when operating the centrifugal oxygen compressor

Compared with air compressors, centrifugal oxygen compressors are characterized by their different working media. Oxygen is a strong oxidizer and combustion-supporting agent. Therefore, there are stricter requirements for safety in design, manufacturing, installation, and use management. E.g:

08/17/2023

Exploring the Pros and Cons of Portable Heat Pumps for Efficient Home Heating and Cooling

Portable heat pumps are becoming an increasingly popular option for homeowners who want to efficiently heat and cool their homes without the need for ductwork.

08/05/2020

Do you know all the protective devices for air-cooled chiller refrigeration compressors

In order to prevent the air-cooled chiller from running uninterruptedly for 24 hours, causing the compressor to operate under high load, the electromagnetic switch is not good, the overcurrent caused by the shaft holding,