What is a direct water heater? Structure and characteristics of direct water heater

What is a direct water heater?

Direct water heater has a compact size, comes with a mechanism to heat water with a resistance bar , then hot water is brought directly to the faucet so that you can use it almost immediately after turning on the machine without any problems. need a water tank.

In addition, the direct water heater is also equipped with additional safety sensors such as: ELCB anti-shock junction, water flow sensor, temperature sensor to bring a sense of safety when used.

General structure and operating principle of direct water heater

General structure

A complete direct water heater is composed of components such as a heating rod responsible for heating water, valves, housing, power cord,… In addition, direct water heaters also design a set of heaters. The temperature sensor helps the machine to automatically turn off when the temperature exceeds the allowable threshold .

Working principle

Initially, the heating element will raise the temperature of the water inside by means of a resistance device. After the water is heated, it will lead to the nozzle and spray directly to the outside. At this time, the ELCB anti-shock device and external sensors will work to ensure safety when used.

When the current is open and there is a risk of electric shock, the anti-shock device will work by creating a difference in the currents passing and the device will automatically break the circuit. Therefore, when using the water heater directly, you can rest assured that you will not be electrocuted.

Advantages and disadvantages of direct water heater

Advantage

• Compact design, does not take up much space. It is a suitable choice for small and medium sized bathrooms.
• Heats up the water almost instantly, no more waiting to be immersed in the relaxing warm water.
• Equipped with many safety systems, protecting users from the risks of electricity, burns or fire.
• Comes with a convenient built-in shower. Some showers also feature antibacterial or massage rays, meeting your usage needs.

Defect

• The machine needs to be installed in a place with high water pressure and stable power source to ensure the best performance.
• Not suitable for large families because they have to heat the water every time they use it, wasting a lot of electricity.
• The maximum heating temperature is 45 – 55 degrees Celsius, so it is only suitable for areas with temperatures above 20 degrees Celsius. If the area temperature is lower than 20 degrees Celsius, the machine will not guarantee the heating effect.

Types of water heaters directly on the market

Direct-fired water heater, resistance

Direct-burning, resistive water heaters often have compact designs and fast heating speeds. However, the internal resistance bar, when used for a long time, will stain the residue, causing the temperature to rise suddenly and lead to electric leakage.

Water heater with booster pump

The water heater with booster pump is equipped with an ELCB anti-shock automatic circuit breaker, a bipolar heat source stabilizer to ensure safety. However, the machine will not achieve high efficiency when external conditions such as flow and water temperature are not up to standard.

Water heater without booster pump

Due to its compact size, the powerless water heater will be suitable for bathrooms with a small area. The machine is also integrated with an anti-scald system and has many different operating power levels. When used for a long time, the machine will easily leak electricity.

Direct infrared water heater

As a type of direct water heater with a rather expensive price, it is integrated with many smart features. The machine is designed to be environmentally friendly and highly resistant to corrosion. In addition, the heating rod system is coated with Nano Carbon for extremely high durability.

Direct water heaters are quite diverse in terms of models, functions, and prices. Which brand of water heater will you choose for your family? Please share with Tnhelearning.edu.vn in the comments at the end of the article !