PIZZATO Switch FR 907-M2

07/20/2020

Performance index of electronic expansion valve:

Advantages of electronic expansion valve: The energy efficiency ratio is improved during high-frequency and low-frequency operation; the reliability of the compressor is improved, and the conditions of oil return, l

08/02/2020

Summary of parameters and phenomena of air conditioning refrigerationheating system

Summary of parameters and phenomena of air conditioning refrigerationheating system 1. R22 refrigeration working state parameters 　　(1) During summer cooling, the normal low pressure of the refrigeration system is between 0.4～0.59MPa.

08/24/2020

What do the refrigeration system overcooling and overheating mean

The so-called "supercooling" is to pass the condensed saturated liquid through a certain device (such as a subcooler) and method (or measure) to recool it so that its temperature is lower than the saturation temperature under the condensation pressure, which is called supercooling .

08/24/2020

What to do if the compressor of screw chiller is damaged

The compressor is the core component of the chiller. Damage to the compressor is a very serious fault and needs to be dealt with in time, otherwise the chiller will not work.

07/31/2020

Responding to the failure of the air conditioning compressor in the computer room, one solution!

The special air conditioner for the computer room is designed based on the characteristics and requirements of the computer room and each communication room. It has the characteristics of constant temperature and humidity, high control accuracy, high air cleanliness and high reliability

06/29/2020

What is the cause of compressor pipeline vibration

09/17/2020

Choose refrigerating oil and start from scratch

Recently, the weather is hot and air-conditioning sales are in the peak season, which has to be reminiscent of "refrigeration". We know that there are many parts that make up refrigeration equipment, and refrigerating oil is an indispensable component.

04/10/2024

Servo Control, Step Control and Variable Frequency Control: Detailed Explanation of the Three Major Controls

The following introduces the working principle, structure, types and application of the three major control methods of servo, step and variable frequency.

06/21/2020

Working principle of reciprocating piston compressor_Characteristics of reciprocating piston compressor

Working principle of reciprocating piston compressor_Characteristics of reciprocating piston compressor <img src="{{media url=&quot;wysiwyg/Working_principle_of_reciprocating_piston_compressor.jpg&quot;}}" alt="" /> Reciprocating piston compressor 　　Positive compressor that changes the internal volume of the compression chamber by one or several reciprocating pistons.

07/08/2020

Advantages and disadvantages of Hitachi central air conditioning

Advantages and disadvantages of Hitachi central air conditioning Hitachi Central Air Conditioning has always been at the forefront of air-conditioning technology, advocating the development and transformation of air-conditioning technology with the height of giants. Advantages: 1. Patented scroll compressor technology, as early as 1983, Hitachi invented the world's first scroll-type air-conditioning compressor and has a patent; and in 2003, Hitachi launched the industry's first internal oil separation function The new high-pressure cavity scroll compressor further improves the efficiency and reliability of the compressor and effectively increases the service life of the air-conditioning host.