Buzz
In today's life, hot and cold water machines are no longer unfamiliar to schools, families... However, not everyone knows and understands the structure and principles of operation of this device. When you know more about it, you will know how to use it safely and save electricity. Moreover, when encountering minor malfunctions, we can fix them without calling a repairman.
Structure of hot and cold water dispensers:
There are 2 types: upright and countertop hot and cold water dispensers.
Upright water dispensers have a tall design, with a water holding capacity of around 2-3 liters. The water spout is positioned at the user's hand level. Additionally, they may include a sterilized chilled water compartment using ozone or a water filtration system. On top of the dispenser, there is space to install a 20-liter drinking water bottle.
Low-profile water dispensers consist only of a compression unit that directly heats and cools water, without additional water filtration or sterilization functions. They are often placed on tables or shelves to avoid dust accumulation, which could affect user health.
The main components of water dispensers include separate tanks for cold and hot water. These tanks, typically made of metal with a capacity of less than 1 liter, are insulated with foam to minimize heat loss. They are connected to the water supply bottle from below and to the water spout from above, ensuring the tanks remain filled with water.
Structure of hot and cold water dispensers:
Operating Principle:
For the hot compartment: A heating rod with a power of approximately 500W is installed, controlled by a relay to maintain water temperature between 90 – 95oC. When the water temperature is below 90 degrees, the relay activates the heating rod, and when the water temperature exceeds 95 degrees, the relay deactivates the heating rod. Additionally, a second relay is installed to protect the heating rod from overheating.
For the cold compartment: A coiled tube is utilized to chill the water. To achieve this, a refrigeration system similar to that of a refrigerator is employed, comprising a compressor, condenser, evaporator coil, and expansion valve. However, the refrigeration system here differs in that the compressor is smaller, and the evaporator coil is coiled to chill the water.
To prevent water in the tank from freezing, which could lead to tank rupture and pose a danger to users, the manufacturer installs an additional relay to safeguard against a malfunctioning temperature relay. This relay functions to cut off power when the water temperature drops too low. The water chilling capacity is approximately 1 liter per hour. Additionally, the machine is designed with some convenient features: power switch with indicator lights for power supply, cooling, and heating; grounding safety component for ease of use, preventing electric leakage, and conserving energy.
Operating Principle
Here is the structure and operational principle of hot and cold water dispensers that Cho Lon Furniture and Electronics Store wants to share with you. We hope it will help you save costs, increase durability, and extend the lifespan of your family's hot and cold water dispenser.
Phuong Khanh
