Siemens PLC 505-4908

07/27/2020

Do you know the reasons for the attenuation of the cooling capacity of the screw refrigeration unit?

Lithium bromide absorption refrigeration units are a type of refrigeration equipment that will inevitably produce cold capacity attenuation.

07/27/2020

The heat is unbearable, and the car air conditioner is turned on like this to quickly cool down

It is the dog days right now. As the saying goes: "Small summer heat catches the big heat, so there is nowhere to hide." If the outdoor in summer is like a stove, then the car can definitely be regarded as an "alchemy stove".

12/23/2022

What is an Erbium Doped Fiber Amplifier?

The erbium optical fiber amplifier (EDFA) is an optical amplifier made of optical fiber doped with erbium.

08/31/2020

Discussion on the Prevention of Pollutants from Compressed Air in Food and Beverage Field

According to statistics from the U.S. Department of Agriculture, there are more than 30,000 food and beverage processing plants in the United States, employing more than 1.5 million workers,

10/06/2025

The main structure of the piston compressor

For piston compressors without crosshead, the main components include the body, crankshaft, connecting rod, piston, cylinder, intake and exhaust valves, etc.; for piston compressors with crosshead, in addition to the above parts, there are cross Head and slide, piston rod and stuffing box, etc.

07/07/2020

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

08/06/2020

Do you know the protection devices of these air-cooled chiller refrigeration compressors

1. Internal thermostat (installed inside the compressor)<br></br> 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,

07/30/2020

How to detect inferior refrigerants What's the harm

Inferior refrigerants will affect the performance and stability of the system, and even more serious will cause damage to system components and compressors. The following methods can be used to distinguish whether it is a low-quality refrigerant:<br></br

06/14/2020

Ten basic performance parameters of refrigeration compressors (technical sharing)

Ten basic performance parameters of refrigeration compressors (technical sharing) 1. Actual gas transmission volume (referred to as gas transmission volume) 　　 Under a certain working condition, the mass of gas delivered from the suction end to the ex器2䀀
ￜ皥
䖒皦즠Ʋ嫜ི㲈Ʋ
䌁皦
ᮔDž༬皧嫦ིЀ呄ᠾ鹨់༹皧
ࠄ
00령ꐱ댁珵뛐珵Љ
䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ
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즠ƲبǜV /펔B䌁皦

08/16/2020

What are the influencing factors of the cooling speed of the cold storage system

1. The cold storage has a large loss of cold due to poor heat insulation or sealing performance 　　 Poor thermal insulation performance is due to insufficient insulation thickness of pipes, warehouse insulation walls, etc., and poor thermal insulation and thermal insulation effects.