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06/14/2020
Refrigeration compressor overheat failure analysis
Refrigeration compressor overheat failure analysis The main reasons for the exhaust temperature overheating are as follows: high return air temperature, large motor heating capacity, high compression ratio, high condensation pressure, and improper refrig 器2 䀀
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07/04/2020
Coronavirus’ business impact: Oil Free Compressor Market Size, Share – Global Industry Report, 2018 to 2028
COVID-19 (Coronavirus) has resulted in many advantages and disadvantages for companies in the Oil Free Compressor market. Research report of this Oil Free Compressor market is highlights key strategies that can help reduce the impact of COVID-19 on diverse business practices.
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09/07/2020
Inverter 35 Q
1. What is an inverter? Inverter is an electric energy control device that uses the on-off action of power semiconductor devices to transform industrial frequency power into another frequency.
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06/19/2020
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.
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06/28/2020
Hitachi compressor, the world's first
When choosing a home central air conditioner, many attentive consumers will compare the compressor technology of various brands. Because the compressor is the heart of the central air conditioner, the advanced nature of the compressor technology is directly related to the effectiveness and stability of the entire air conditioning system. It’s no surprise that consumers are more concerned about compressor technology. The editor here briefly introduces the advantages of Hitachi compressors.
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06/13/2020
Refrigeration compressor failure phenomenon and determination method
Refrigeration compressor failure phenomenon and determination method 1. How to identify the three binding posts on the casing of the hermetic compressor? Running end (R), starting end (S), common end (C), the resistance between RS is greater than that 器2 䀀 ᅵ皥 䖒皦즠Ʋ嫜ི 㲈Ʋ 䌁皦 ᮔDž༬皧嫦ིЀ 呄ᠾ鹨់༹皧 ࠄ 00령ꐱ댁珵뛐珵Љ 䕄ྦ 뤂ᐱ뚜珵 ᴴᏩ呄ᠾ퍘ᒥ 鹨់ᩄ ꋔྦ 瑉浥 巠皱㙲皦抐皱 巠皱 ੨皦柘皱 ᅵ皥 ب 巠皱㙲皦忈皱 ੨皦柘皱 즠Ʋǜ 勁皦즠Ʋب ǜ V / 펔B䌁皦 ᮔDž '鱤džၜ먢䇨珵呈ᠾ뤂ᐱ ⿇
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03/27/2023
Different Types of Refrigeration Compressors and Their Applications, Brands
The refrigeration compressor is the core and heart of the refrigeration system, and is an indispensable part of air conditioners, refrigerators, chillers, etc.
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10/20/2021
Air Compressor Troubleshooting and Solutions
With the development of motor technology, compressor is considered as "general machinery", especially in coal chemical industry, machinery industry and other industries.
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09/10/2020
Discussion on Reasons and Protection of Air Compressor Motor Damage
Air compressor is abbreviated as air compressor. As a general-purpose mechanical equipment, it is widely used in the field of industrial and agricultural production. The problem is that the motor (three-phase asynchronous motor) as the power equipment of the air compressor generally has a higher failure rate than other motors.
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03/12/2021
Composition of servo drive system
The controller is usually a computer or PID control circuit, and its main task is to transform and process the deviation signal output by the comparison element, so as to control the executive element to act as required.