Common medical masks are used to block spouts exhaled from the oral cavity and nasal cavity, and can be used for one-time hygiene care in ordinary medical environments with the lowest protection level. It is suitable for general hygiene care activities, such as sanitary cleaning, liquid distribution, cleaning bed units, etc., or the blocking or protection of particles other than pathogenic microorganisms such as pollen. Medical Face Mask,Disposable Medical Mask,Disposable Protective Face Mask,Non Woven Surgical Face Mask Guangzhou Aikangli Medical Technology Co., Ltd. , https://www.aikanli.com
Conforms to the relevant registered product standard (YZB), generally lacks the filtration efficiency requirements for particles and bacteria, or the filtration efficiency requirements for particles and bacteria are lower than medical surgical masks and medical protective masks, only reaching 20.0% for 0.3μm diameter aerosols -25.0% protection effect, can not reach the filtration efficiency of particles and bacteria, can not effectively prevent pathogens from invading through the respiratory tract, can not be used for clinical invasive operations, nor can it protect particles and bacteria and viruses, only limited to dust particles Or aerosol plays a certain mechanical barrier.
1. Carefully cover the mouth and nose with a mask and fasten it to minimize the gap between the face and the mask;
2. Avoid touching the mask when using it-after touching the used mask, for example to remove or clean the mask, wash your hands with soap and water or use alcohol hand sanitizer;
3. After the mask is wet or contaminated with moisture, replace with a new clean and dry mask;
4. Do not reuse disposable masks. Disposable masks should be discarded after each use.
Industrial chiller working principle
The chiller is a water cooling device that provides constant temperature, constant current, and constant pressure cooling water equipment. The working principle is to first inject a certain amount of water into the water tank of the machine, and then cool the water through the refrigeration system, and then the low-temperature cooling water is sent to the equipment to be cooled by the water pump, and the chilled water takes the heat away and then the temperature rises and then flows back to the water tank. , to achieve the effect of cooling. The cooling water temperature can be adjusted automatically according to requirements, and long-term use can save water. Therefore, the chiller is a standard energy-saving device.
Cooling principle of industrial chiller
The operation of an industrial chiller system is through three interrelated systems: a refrigerant circulation system, a water circulation system, and an electrical control system.
Refrigerant circulation system :
The liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate. Finally, a certain temperature difference is formed between the refrigerant and the water. The liquid refrigerant is completely evaporated to a gaseous state and then sucked and compressed by the compressor (pressure and temperature increase). The gaseous refrigerant absorbs heat through a condenser (air-cooled/water-cooled), condenses into a liquid, and is throttled by a thermal expansion valve (or capillary tube) to become a low-temperature low-pressure refrigerant to enter the evaporator, completing the refrigerant circulation process.
Basic composition of the refrigeration system
     Compressor: The compressor is the core component of the entire refrigeration system and the source of refrigerant compression. Its function is to convert the input electrical energy into mechanical energy to compress the refrigerant.
 Condenser: The condenser acts to output thermal energy and condense the refrigerant during cooling. After the high-pressure superheated steam discharged from the refrigeration compressor enters the condenser, all the heat absorbed in the working process, including the heat absorbed from the evaporator and the refrigeration compressor and in the pipeline, is transferred to the surrounding medium (water or The air is taken away; the refrigerant high pressure superheated vapor recondenses into a liquid. (Depending on the cooling medium and cooling method, the condensers can be divided into three categories: water-cooled condensers, air-cooled condensers, and evaporative condensers.)
  Reservoir: The reservoir is installed after the condenser and is in direct communication with the drain of the condenser. The refrigerant liquid in the condenser should flow unimpeded into the reservoir so that the cooling area of ​​the condenser can be fully utilized. On the other hand, when the heat load of the evaporator changes, the required amount of the refrigerant liquid also changes, and at that time, the reservoir functions to regulate and store the refrigerant. For small refrigeration systems, the reservoir is often not installed, but a condenser is used to regulate and store the refrigerant.
Drying filter: moisture and dirt (oil, iron filings, copper scraps) must be prevented from entering the refrigeration cycle. The source of moisture is mainly the newly added refrigerant and trace water contained in the lubricating oil, or due to the maintenance system. The moisture that comes when the air enters. If the moisture in the system is not cleaned out, when the refrigerant passes through the throttle valve (thermal expansion valve or capillary), the moisture will solidify into ice due to the pressure and temperature drop, which will block the passage and affect the normal operation of the refrigeration unit. Therefore, a dry filter must be installed in the refrigeration system.
Thermal expansion valve: The thermal expansion valve is both a flow regulating valve in the refrigeration system and a throttle valve in the refrigeration device. It is installed between the drying filter and the evaporator in the refrigeration device, and its temperature sensing package is bandaged. At the exit of the evaporator. Its main function is to reduce the pressure of the high-pressure normal temperature refrigerant liquid when flowing through the thermal expansion valve, and become a low-temperature low-pressure refrigerant wet steam (mostly liquid, a small part is steam) enters the evaporator and vaporizes in the evaporator. It absorbs heat and achieves the purpose of cooling and cooling.
Evaporator: An evaporator is a heat exchange device that relies on the evaporation (actually boiling) of a refrigerant liquid to absorb the heat of the cooled medium. Its function in the refrigeration system is to absorb heat (or output cooling). In order to ensure a stable and long-lasting evaporation process, the vaporized gas must be continuously withdrawn by a refrigeration compressor to maintain a certain evaporation pressure.
Refrigerants: Most industrial chillers used in modern industry use R22 or R12 as refrigerant. Refrigerant is a working fluid in a refrigeration system. Its main function is to carry heat and achieve heat absorption and heat release when the state changes.
water circulatory system:
The water circulation system is a pump that draws water from the water tank to the equipment that the user needs to cool. The chilled water takes the heat away and the temperature rises, and then returns to the chilled water tank.
Electrical control system:
The electrical control system includes a power supply section and an automatic control section.
The power supply part supplies power to the compressor, fan, water pump, etc. through the contactor.
The automatic control part includes the functions of temperature controller, pressure protection, delay device, relay, overload protection, etc., which can automatically start and stop according to water temperature, and protect.
Chiller working principle diagram
Industrial chiller cooling characteristics and application
Industrial chiller cooling features
    Today, with the rapid development of modern industrial technology, in order to improve production efficiency, improve product quality, and reduce production costs, temperature control requirements in temperature control during production are becoming higher and higher.
Generally, water cooling (that is, natural water and water tower cooling methods) cannot achieve high precision and high efficiency to control temperature, because natural water and water tower heat are inevitably affected by natural temperature, and winter water temperature is high at summer. . If the temperature is 30 ° C, it is almost impossible to achieve a water temperature of 10 ° C, so control in this way is extremely unstable.
The chiller is completely different from the general water cooling equipment because the chiller has a completely independent refrigeration system, which is never affected by temperature and environment. The water temperature is adjusted within the range of 5 °C to 30 °C, so that high precision can be achieved. The purpose of high temperature control. The chiller has an independent water circulation system, and the water in the chiller is recycled, which can save a lot of water.
Industrial chiller application
Industrial chillers are widely used in industrial production processes, such as:
Plastic industry: Accurately control the mold temperature of various plastic processing, shorten the cycle of beer and plastic, and ensure the stability of product quality. Electronics industry: Stabilize the molecular structure inside the production line of electronic components, improve the qualification rate of electronic components, and apply it to the ultrasonic cleaning industry to effectively prevent the damage caused by the volatilization and volatilization of expensive cleaning agents.
Electroplating industry: control plating temperature, increase the density and smoothness of plating parts, shorten plating cycle, improve production efficiency and improve product quality.
Machinery industry: control the pressure oil temperature of the oil pressure system, stabilize the oil temperature and oil pressure, prolong the oil quality use time, improve the efficiency of mechanical lubrication and reduce wear.
Construction industry: The chilled water for concrete is used to make the molecular structure of concrete suitable for the purpose of construction, and effectively enhance the hardness and toughness of concrete.
Vacuum coating: Control the temperature of the vacuum coating machine to ensure the high quality of the plated parts.
Food industry: used for high-speed cooling after food processing to adapt to packaging requirements. There is also a temperature for controlling the fermented food.
Chemical fiber industry: Freeze and dry air to ensure product quality.
Industrial chiller performance and technical parameters
performance:
Precise control of the various temperatures required for industrial processes (5°C to +40°C).
New original compressors from Europe and the United States and control parts of famous factories in various countries.
Multiple cooling circuits can be set up according to customer requirements, and each circuit can be operated separately.
Complete protection devices (phase sequence and phase loss protection, overload protection, overvoltage and undervoltage protection, high and low voltage display, water shortage protection and alarm, temperature control and display, antifreeze, etc.) and interrelated control circuits. The fault is displayed on the panel for easy access.
Water-cooled and air-cooled specifications (power: 1/2HP-300HP). Specially equipped with models suitable for machinery and equipment in various industries, it can be specially manufactured according to customer requirements.
Technical parameters (air-cooled / water-cooled chiller)
Temperature control range (3°C-35°C)
model
XR-1.5HP
XR-3HP
XR-5HP
XR-7HP
XR-10HP
XR-15HP
XR-20HP
XR-30HP
Standard cooling capacity Kcal/h
Standard condition
2000
4200
7000
10500
14000
21000
28000
42000
Air conditioning condition
2200
6300
11000
18000
23700
29200
47400
58400
temperature control
°C
4~35
Ambient temperature
°C
0~42
Compressor power
HP
1.5
3
5
7
10
15
20
30
Running current
A
2.8
5
9.7
13
19.5
28
38.5
47.5
Refrigerant
R22 or R12
cooling method
Air cooled
Air cooled
Air cooled
Air cooled
Air-cooled/water-cooled
Air-cooled/water-cooled
Water cooling
Water cooling
Take over
DN
16
25
25
32
32
40
40
40
Chilled water flow
L/min
20
33
50
60
80
165
200
250
Water tank reference volume
L
40
60
85
120
160
170
200
280
Chilled water pump power
KW
0.125
0.33
0.45
0.75
1.1
1.5
3
3
protective device
Phase sequence protection, high and low voltage protection, overload protection, liquid level protection, temperature control, etc.
Dimensions (length × width × height)
Mm×mm×mm
800×600×1200
1000×700×1400
1100×800×1500
1200×850×1600
1300×900×1700
1400×1000×1800
2000×2000×1800
2000×1000×1900
equipment weight
Kg
90
130
170
250
300
360
400
500
If the above specifications, sizes and functions cannot meet the needs of customers, they can be customized according to customer needs, and can be equipped with accessories such as cleaning baskets or cylinder heads according to customer requirements.
Instructions: