Which is more suitable for your independent/non-independent refrigeration unit?
The quality of a refrigerated truck is determined by three parts: the chassis, the car body and the refrigeration unit. This is where the choice of refrigeration units is a top priority. Users who know about refrigerated trucks should have heard about independent and non-independent refrigeration units. How do these two types of refrigeration units differentiate? To this end Xiao Bian finds information on the Internet, consults the personnel of the refrigerated truck manufacturers, and organizes the following contents so that everyone can learn.
Which is more suitable for your independent/non-independent refrigeration unit?
â— What is the independent refrigeration unit and non-independent refrigeration unit
Independent chiller units : Independent and non-independent chillers are classified according to the source of power. Independent chillers refer to chillers that have separate power sources. The chillers themselves have independent power sources.
In general, independent refrigeration units are of one-piece structure but also have a modified split-type structure (this structure is generally hoisted on the girder of the car). The unit itself has an engine and a generator for providing power and electric energy to the refrigeration system. Device. Can work independently, not limited by the working status of the car engine.
Non-independent refrigeration unit: As the name implies, it is a refrigeration unit that cannot work independently. This kind of unit does not have a power unit, and it must rely on the automobile engine to drive the compressor.
Non-freezing refrigeration unit
Non-independent refrigeration units can also be divided into one-piece and split-type structures. The split structure includes three types: condenser front, condenser top and condenser bottom (bottom or concealed); however, the condenser front structure is the most common structure inside a split independent refrigeration unit. form.
â— Advantages and disadvantages of independent and non-independent refrigeration units
Independent refrigeration unit
Advantages: The advantages of the independent refrigeration unit are stable and reliable, which is also what refrigerator cars need most. Since the independent refrigeration unit has a separate power output source, the refrigerator can still work when the refrigerated vehicle is out of flame or when there is an engine failure in the refrigerated vehicle, so as to ensure that the cargo inside the refrigerated compartment does not deteriorate.
Integrated independent refrigeration unit
Disadvantages: The disadvantage of an independent refrigeration unit is that it is expensive and maintenance is more complex than a non-independent refrigeration unit. Since more power systems are more complex in maintaining and maintaining independent chillers than non-independent chillers, independent chillers are technically more complex and more expensive.
Non-independent refrigeration unit
Advantages: The advantages of non-independent refrigeration units are low price, simple structure, easy maintenance and maintenance.
Disadvantages: The disadvantage of a non-independent refrigeration unit is that it relies too much on the power source of the refrigerator car. When the refrigerator car engine stops working, the non-freezing refrigeration unit loses its power support, the cooling system stops working, and if the car is turned off, frequently open the car door. Leaving a large amount of air-conditioning in the car's cabinet will cause the temperature in the cabin to rise, or the refrigerator will stop cooling in the event of a car failure (engine failure) and the cargo in the compartment will be subject to loss.
â— The choice of independent refrigeration units and non-independent refrigeration units
From the price point of view: the price difference between the non-independent chiller unit and the independent chiller unit is more than tens of thousands of yuan, the budget is relatively abundant, and the temperature requirement in the vehicle compartment is not very high (the required temperature is at least minus 10 degrees below). It is better to use a freestanding proposal.
From the length of the transport distance: In the short-distance distribution within the city or between districts and counties, the use of non-independent units is recommended. Not only the procurement cost is lower, but even if a failure occurs, the maintenance is easy; for long-distance transportation, it is recommended to use a stand-alone refrigeration unit because Even if the car engine stops working during long-distance transportation, the chiller can still be normally cooled to ensure the safety of the transported items.
From the model to be used: In general, light trucks with a body size of less than 7 meters are recommended. Non-independent units are recommended. Trucks with a 7-meter-plus truck or semi-trailer are better equipped with free-standing units.
â— Postscript:
There is a saying that is very good, not the best, only the best for you. Independent refrigeration units have obvious advantages in terms of stability and reliability, but their price is high. Non-independent refrigeration units are simple and inexpensive to maintain. Each has its own advantages and disadvantages. When users purchase, they must comprehensively choose from various aspects. No one who is absolutely better than the refrigeration unit, only the best for their own transport environment.
Classification of gantry type Milling Machine
(1) Divided by form
According to whether the gantry is moving, it is divided into a gantry fixed table mobile type (about 90% or more) and a gantry mobile type (also called bridge type).
The bridge type gantry milling is characterized by a small footprint and a large carrying capacity. The gantry travels up to 20 meters, making it easy to machine long or heavy workpieces.
According to whether the beam moves on the column, it is divided into two types: moving beam type and fixed beam type; the beam moving on the elevated bed is called overhead type.
(2) Divided by system
It is divided into ordinary type and CNC type. There are also manufacturers to develop digital intelligent gantry milling with ordinary milling and CNC Milling – one button conversion, which is more flexible and practical.
(3) Divided by capability
It`s divided into light, medium and heavy (super heavy) gantry milling.
Performance characteristics
The gantry milling machine has sufficient rigidity, high efficiency, convenient operation, simple structure and comprehensive performance.
The specific performance characteristics vary according to the type, model and manufacturer, and have a lot to do with the technology used.Taking the SK series three-axis CNC gantry milling mentioned above as an example, its performance characteristics are:
1. The vertical milling head is equipped with TX400 heavy-duty gantry milling head, double rectangular guide rail, with strong rigidity;
2.Milling head mounted ball screw, pneumatic broach device, servo motor drive;
3.The side milling head is equipped with a V5 gantry milling head with an independent lubrication device. The lifting is driven by an ordinary reducer, and the frequency control is adopted;
4.Universal milling/CNC milling one-button conversion three-axis CNC system, which can be programmed and operated manually by the expansion panel, which is extremely implementable in the actual machining process;
5.The bed is advanced and retracted, the beam is up and down, and the vertical milling head is equipped with a Taiwan ball screw, which is driven by a servo motor;
6.With timing belt and synchronous wheel;
7.Hand-held electronic handwheel unit for easy three-axis tool setting;
8.Unique beam lifting safety interlocking device to ensure the repeatability of the machine tool;
9.The station standard cycloid pump group is continuously lubricated with low failure rate.
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Jiangsu Hoston Machine Tools Co., Ltd. , https://www.hostoncnc.com