The benefits of using cabinet air conditioners in electrical ...

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With the arrival of the hot summer, the global high temperature reaches 40°C, the automation of various equipment such as industrialization and mechanization is getting higher and higher, and the application of electrical equipment can be seen everywhere. , once the temperature in the equipment cabinet exceeds too much, it will affect the stability and service life of the control equipment, and in serious cases, unnecessary safety accidents will occur.

So how to solve this problem?

The solution for everyone is to install cooling fans on the control cabinet to achieve cooling. Indeed, this is also an economical and practical method. However, when the outdoor temperature is high in summer, the cooling capacity will be insufficient. And when the cooling fan is working, under the interference of the outside world, for example, oil, dust, etc. will inevitably enter the control cabinet. It will cause a sudden failure of the control cabinet. In this context, in order to ensure the normal working temperature of the equipment, reduce the failure rate and prolong the service life.

In order to solve the problem of heat dissipation of the control cabinet at one time, Linkwell recommends the use of cabinet air conditioners here.

The definition of cabinet air conditioner is a device that can adjust the temperature, relative humidity and flow speed of the air in the electrical control cabinet, and realizes heat absorption and cooling through compression refrigeration. The air inside the cabinet is cooled, and the heat inside the cabinet is dissipated out of the cabinet through heat exchange, so as to protect the electrical components of the cabinet to operate in a controllable temperature range. At the same time, the cabinet air conditioner has a dehumidification function to ensure the ideal temperature and humidity inside the cabinet. . Transfer the heat and moisture in the air in the control cabinet to the outside of the cabinet. High temperature, dust, oil pollution and corrosive gas in the external environment will not enter the inside of the control cabinet, thus solving a series of problems caused by the use of cooling fans to dissipate heat. The control cabinet can always be maintained in an ideal temperature environment of 30--35 °C, and the service life and stability of electronic and electrical equipment are effectively guaranteed.

Shanghai Linkwell Cabinet Air Conditioner specializes in the R&D and production of cabinet air conditioners. The designed cabinet air conditioner is especially suitable for cooling inside the cabinet. Linkwell industrial cold air conditioner can effectively reduce the temperature inside the cabinet in the fastest time. , and Linkwell cabinet air conditioners have the advantages of small size, light weight, safety and environmental protection, and reliable quality!

Linkwell cabinet air conditioners have the following characteristics

1. Adopt IP54 non-condensing water design, unique condenser management system, condensed water can be volatilized in real time; that is, when the protection level of the electrical cabinet reaches IP54, the air conditioner does not discharge condensed water, and the condensed water evaporates directly inside the air conditioner and circulates outside the cabinet. When the electrical cabinet is not well sealed or the humidity in the workshop is extremely high, and the evaporation of the air conditioner is not enough, the condensed water of the air conditioner will all be discharged out of the cabinet from the spare outlet of the air conditioner;

2. Ultra-thin, beautiful and compact design, small size, light weight, simple maintenance, stable working performance, long service life and wide application range;

3. High-performance, industrial-grade centrifugal fans are used to completely eliminate air short-circuits in the cabinet and provide better heat dissipation.

4. Adopt environmentally friendly high temperature resistant refrigerant R134a, which is environmentally friendly, energy saving and efficient, and can work even if the ambient temperature of the workshop is as high as 60°C.

5. At the same time, the cabinet air conditioner also adopts a double insurance condensate water collection device, which fully ensures that the condensate water of the air conditioner will not enter the electric control cabinet;

6. The variety is complete, and the cooling capacity of standard products ranges from 350W to W. Special designs can also be made according to user requirements.

7. Easy and fast installation

Linkwell has been engaged in cabinet accessories for many years, cabinet air conditioners and supporting condensate evaporators, air coolers, heat exchangers, fans and filters, filters, fan units; At the same time, the development of cabinet air conditioners is rich in varieties: outdoor air conditioners, top-mounted air conditioners Air conditioners, side-mounted air conditioners, and wall-mounted air conditioners have higher advantages in terms of price, delivery time and after-sales guarantee. There is an excellent after-sales maintenance team around the world, actively responding to and cooperating with the needs of users. Makes the use of the product to lift all the worries of the user. With various successful cases, the company has passed ISO, CE, ROHS, IP56, IP66 protection grade certification. Our products provide high-standard project support around the world. At present, Linkwell cabinets have been designated by more than 80 countries and Fortune 500 companies. You are welcome to come and learn.

In an electrical panel, one of the most problem-giving means is heating. As electrical components run inside a panel, they discharge heat over a period of time. This happens due to current consumption and as we know, current throws thermal energy outside when in a large rating.

Electrical Cabinet

The heating issue cannot be observed mostly in smaller electrical panels but is observed generally in panels where current consumption is large. Overheating after a period of time can damage the electrical components or burn wires inside.

So, cooling methods must be adopted in electrical panels to control the heat. One such method used in panel cooling is using air conditioners. In this post, we will see the concept of air conditioners in panel enclosures.

Enclosure Cooling

If you want to learn more, please visit our website Lingji Jingke.

First of all, let us understand why cooling is required in a panel enclosure. As you know, electronic and electrical devices have operating temperature ranges written on their nameplates. When a device is operated in that range, it functions for a good lifetime span.

But, if the device is operated at high temperatures for a long time, it can cause various types of faults like overload, internal burning of components, and breakdown of components. This high temperature is not good for devices inside the panel. Increasing device failures also cause an increase in maintenance costs.

So, cooling methods must be done in panel enclosures to increase the lifetime of devices and maintain the operation under control for a long time. There are many methods to cool a panel like natural convection cooling, forced convection cooling, air conditioning, heat exchangers, vortex cooling, thermoelectric cooling, etc. Out of these, we will discuss air conditioning in this post.

Closed Loop Cooling

Air conditioning is a type of closed-loop control. Basically, it monitors outlet temperature and accordingly, operates the compressor and condenser fans. Usually, condenser fans are on continuously, but the compressor is the one that controls temperature by loading and unloading the refrigerant gas inside the circuit. This gas flow is responsible for efficient heat exchange between inlet temperature and outlet temperature. This same principle works for a panel enclosure AC (air conditioner).

The AC is mounted on the side of the enclosure panel. The temperature inside the panel is monitored continuously. When the temperature rises, the compressor will increase the loading of gas to bring down the temperature, by exchanging hot inside air with the outside air.

When the temperature decreases, the compressor performs unloading of gas to bring the temperature up by exchanging cold air with the outside air. Air must not be too cool or too hot, as any extreme condition can damage the components.

How to Calculate Enclosure Airflow?

Now that our concept of air conditioning is clear, we will see how to calculate the airflow inside the panel for designing the AC circuit.

Consider the following parameters for calculation:

1. Heat dissipated
2. Air temperature
3. Location of the panel
4. Delta temperature (difference between outside and inner temperature)
5. Volume of air required at a particular altitude per ºC change

It is necessary to understand that the maximum ambient temperature must always be higher than the maximum enclosure temperature inside. This is because heat exchange takes place by taking cooler air from outside and if the ambient temperature is only hotter, then the heat exchange will not take place effectively.

So, to select the best air conditioner system, the delta temperature must be related to the cooling capacity of the AC unit. If the difference is higher than the cooling capacity, then it means the AC unit will perform within its limit by providing efficient heat exchange.

Enclosure Air Conditioner Maintenance

1. Always check on a periodic basis whether the delta temperature is higher than the cooling capacity. This will ensure that the AC unit will be able to properly exchange heat with the outside ambient air temperature.
2. Ensure that the panel is closed properly without any leakages or holes. This will prevent outside dust from entering the panel and also ensure that any air does not leak during the process of refrigeration.
3. Panels must not be opened frequently. If this is the case, then install a sensor for sensing door opening or closing. Take action on sensing it.
4. Nowadays, PLC is mostly used inside the AC unit for proper control. Do regular maintenance of the PLC and see to it whether its program is working properly or not.
5. Filters play a critical role in filtering air dust, dirt, and non-corrosive liquids. Regularly clean the filters.
6. The most important thing is proper panel wiring. If the wiring and component placing are not done with proper engineering, then cooling will not be effective. So, leave maintenance ahead; first ensure proper panel design and engineering.

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