Evaporator is an indispensable part of refrigeration system. So evaporator What role does it play that makes it so important? Currently, there are different types of evaporator Which one is highly rated? Let's explore with Tan Long Refrigeration through the article below.
Find out what an evaporator is?
Evaporator is an important part of chiller system. It exchanges heat between refrigerant (refrigerant) and the environment that needs to be cooled, such as space, air in the refrigerator, cold storage, or food that needs to be preserved. The main function of the evaporator is to absorb heat from the environment that needs to be cooled.
Outstanding features of air evaporator
Structural features
Evaporator specially designed to exchange heat between the refrigerant and the outside air. In cooling devices such as refrigerators without a fan, the evaporator coil contains heat exchangers that allow the refrigerant to circulate and cool the air. It is usually made of stainless steel, and if aluminum foil is used, it is coated with a protective layer to prevent food spoilage. Common types of evaporators include coils in sheet metal, finned coils, or coils attached to the inside wall of the refrigerator.
Operating characteristics
The refrigerant gas after leaving the tank and capillary tube will reduce pressure and evaporate at the air evaporator head. The mixture of liquid gas vapor created from the evaporated gas and liquid gas, low temperature and pressure will be led into the coil and brought to the liquid accumulator, helping to direct and filter the vapor into the air compressor, preventing liquid from entering.
Special request
Cooling capacity: The evaporator must maintain its designed cooling capacity, with a sufficiently large heat exchange area.
Air circulation: Ensure efficient air circulation.
Pressure and corrosion resistance: The equipment must be pressure resistant and not corroded by the food being stored.
Construction and maintenance: The evaporator needs to have the latest manufacturing technology for easy and quick installation and maintenance.
The role of evaporator
Evaporator (condenser) plays an important role in the refrigeration system. It vaporizes the saturated gas after throttling and cools the environment that needs to be cooled. This is one of the indispensable devices, along with the condenser, compressor and throttling device.
The performance of the evaporator directly affects the cooling time and efficiency. If the evaporator is not working properly, the cooling process will be prolonged and will not reach the required temperature, reducing the efficiency of the entire system. If the device does not evaporate all the liquid, compressor can absorb moisture, causing flooding problems.
On the contrary, if evaporator too large compared to the requirement, will cause waste of cost and increase the superheat of the steam output. Therefore, choosing evaporator Appropriateness based on the efficiency, characteristics and properties of the product to be cooled is very important.
Types of evaporators commonly used
Evaporator in the refrigeration system is very diverse, suitable for different purposes. Below are some commonly used branded types:
Kewely brand evaporator DL 21.0/105
Origin: China
Temperature: -18°C to 2°C
Power: 1.3 – 55 kW
Refrigerant gas: R22, R404A, R130A
Zhongli brand evaporator DD-11.2/60
Application: Cold room, cold storage, cooler, dryer, ice maker
Power: 11.2 kW
Standard size: 1780mm x 540mm x 740mm
Voltage: 220V
Zhongli brand evaporator DJ-1.2/8
Application: Cold room, cold storage, cooler, dryer, ice maker
Power: 1.2 kW
Cooling area: 8m²
Dimensions: 1030mm x 410mm x 540mm
Weight: 33 kg
Kewely brand evaporator DD-14.9/80
Origin: China
Temperature: -18°C to 2°C
Power: 14.9 kW
Voltage: 380V/3 Phase/50Hz
Refrigerant gas: R22, R404A, R130A
EEJ Quang Thang brand evaporator
Application: Cold storage below -25°C
Radiator fins: 9mm pitch, copper tube 9.52×0.3mm, 12.7×0.35mm, 15.88×0.4mm
Evaporation temperature: -35°C
Refrigerant gas: R22, R404A, R407C
Proper technical maintenance method of evaporator
When ice sticks on condenser, the heat resistance increases, the cold air flow is blocked and the air flow is reduced. If it is serious, the fan blades may be blocked, causing the cooling fan motor to not rotate, resulting in the motor burning out.
Condenser need to be defrosted at least twice a day. The defrosting process consists of 3 steps:
- Remove all refrigerant
- Defrost the evaporator
- Dry the evaporator
- Air Conditioner Cleaning Process
- Stop operation completely and let the condenser drain and dry completely.
- Clean the condenser with a brush or wash with water, a condensate drain system can be used.
- Drain the condenser oil, it can be drained to the recovery tank or directly to the outside.
- Following this procedure correctly will help the condenser operate more efficiently and durably.
Conclude
The above article has provided a lot of information about evaporator, including the role and different brands of evaporators with many separate uses. To update more useful knowledge and choose genuine products, follow Tan Long ok
