One of the important factors to achieve cooling efficiency is the effective operation of the defrost resistor. So Cold storage defrost resistor What is it? How to check, maintain and replace when necessary? This article, Tan Long will provide you with the necessary knowledge about the structure, operating principles, as well as inspection and maintenance steps. defrost resistor.
Find out what a cold storage defrost resistor is?
Cold storage is a place to preserve food, products, medicines, etc. with strict temperature requirements. To ensure the temperature is always at a certain cold level, cold storage must comply with strict technical standards. In particular, cold storage door heater is an indispensable device in a standard cold storage.
Defrost resistor, also known as defrost resistor, de-icing resistor is a device that has the function of emitting heat, melting snow or ice stuck on condenser. This helps cold storage condenser Operates efficiently, maintains stable cooling capacity, and operates quietly.
Similarly, refrigerators, air freezer also have this part. Defrost resistor in cold storage make sure that condenser not frozen, helps cold storage Always maintain a stable temperature to best preserve food and equipment.
Structure and operating principle of cold storage defrost resistor
Structure of cold storage defrost resistor
The de-icing resistors have a very simple structure, including a main heating element and some other parts. Below are the main parts of the Cold storage defrost resistor:
- Outer glass layer: Protects internal components and against environmental impacts.
- Maiso wire: Placed inside, emits high heat to melt ice and snow in the refrigerator.
- Plastic layer: Arranged at both ends of the resistor to insulate and protect the maiso wire.
- Two wires: Located at the two ends of the resistor, it is responsible for connecting the devices in the cold storage defrost system.
Principle
When cold clams of the chiller detected condenser covered with snow and ice defrost resistor will signal the compressor to stop working. Then, the resistor will radiate high heat to heat up condenser, causing the ice to melt.
When the ice and snow have completely melted, cold storage temperature will drop to the preset level. At this point, cold clams will automatically shut off and the defrost resistor will stop working, allowing cold air from condenser evenly distributed cold storage.
How to check the cold storage defrost resistor accurately
Using a multimeter
The procedure for checking the cold storage defrost resistance with a multimeter is as follows:
- Step 1: Connect the 2 test leads to the multimeter and select the x100 resistance scale.
- Step 2: Place the two ends of the measuring probe in contact with the two ends of the resistor, the black probe on the negative terminal (-) and the red probe on the positive terminal (+).
- Step 3: Observe the display of the watch. If the result is between 200-700 Ω then the resistor is still working well. On the contrary, if it is outside this range, the resistor is damaged and needs to be replaced.
Observe
How to check defrost resistor otherwise through direct observation. First, remove the resistor from the cold storage. Then, tilt the resistor to observe the wire mayso inside. If the wire mayso is broken or damaged, you need to replace the wire. If the mayso wire is intact, the resistor is still working properly.
Distinctive features of cold storage door heating resistors
The wire has good elasticity.
sewing thread made from silicone rubber, a high-quality and popular material in many modern electrical devices thanks to its outstanding advantages. The outstanding feature of mai so wire is its high elasticity and ability to withstand sudden temperature changes in cold storage environments.
High security
Silicone rubber not only helps increase the durability and service life of the wire, but also has good insulation, waterproof and water resistance. Thanks to that, the cold storage door heating resistor can operate effectively in harsh environmental conditions, outdoors or in water.
Applications of cold storage defrost resistors
Defrost cold storage door
Cold storage Maintain low temperatures to preserve food, but ice forms easily at rubber gasket of the door, making it difficult to open the door and quickly damaging the door. The heating resistor helps prevent ice from sticking to the door, making it easier to open and close and prolonging the life of the cold storage door. In addition, the heating resistor is also used in industrial refrigeration system and condenser pipe.
Drying in drying equipment
Another popular application of heating resistor is in the drying equipment. Heating resistor Can withstand high temperatures and increase heat quickly, helping to maximize drying efficiency.
Resistor selection and maintenance
The choice Cold storage defrost resistor suitability is extremely important to ensure efficiency and cost savings for operations. cooling system When choosing defrost resistor, need to note the technical parameters such as:
- Capacity
- Voltage
- Impedance
- Size
- Production material
Additionally, regular maintenance and repairs when necessary will ensure the efficiency and longevity of the defrost resistor. Don’t forget to regularly check the resistor wires, heat sinks, and electrical connections to ensure they are working properly.
Note when replacing new cold storage defrost resistor
When you check the defrost resistor and find it broken or broken, you need to replace it. Cold storage defrost resistor new. During replacement, the following should be noted:
- Make sure to check and accurately identify the cause of the damage so that the component can be replaced quickly and accurately.
- The process of testing defrost resistors requires high experience and expertise.
- If you do not have expertise, contact a professional instead of checking and replacing yourself.
- Choose a reputable cold storage defrost resistor repair unit.
- Replace damaged components with genuine parts of clear origin to ensure good operation and avoid problems.
Conclude
Above is the basic and important information about cold storage defrost resistors. Hopefully the article will help you better understand the role, structure, operating principles, as well as how to check and maintain. Cold storage defrost resistor. Mastering this knowledge will help you maintain the performance and longevity of your cold storage system, ensuring safety and energy saving.
