Constant temperature and humidity machine precision air conditioner

Constant Temperature and Humidity Integrated Unit
The Huashi Dadi constant temperature and humidity integrated unit is manufactured with precision processes to ensure the stability and durability of the equipment, enhancing the user experience. It features intelligent control with a built-in intelligent control system, enabling automated operation, reducing labor costs, and improving work efficiency. The unit is stable and reliable, and has passed strict quality inspections to ensure its stable performance and reduce failure rates.

The operation of the constant temperature and humidity unit system relies on three interconnected systems: the refrigerant circulation system, the air circulation system, and the electrical automatic control system;
Refrigerant circulation system:
The liquid refrigerant in the evaporator absorbs heat from the air (cooling and dehumidifying the air) and begins to evaporate. Eventually, a certain temperature difference forms between the refrigerant and the air. The liquid refrigerant completely evaporates into a gas, then is sucked in and compressed by the compressor (increasing pressure and temperature). The gaseous refrigerant absorbs heat through the condenser (air-cooled/water-cooled) and condenses into a liquid. After being throttled by the expansion valve (or capillary tube), it becomes a low-temperature and low-pressure refrigerant entering the evaporator, completing the refrigerant circulation process.
Air circulation system:
The fan is responsible for drawing in air from the return air outlet. The air passes through the evaporator (cooling and dehumidification), humidifier, and heater (heating up), then is sent to the space required by the user through the supply air outlet. The supplied air mixes with the air in the space and returns to the return air outlet.
Electrical automatic control system:
It includes a power supply part and an automatic control part.
The power supply part supplies power to the compressor, fan, humidifier, etc., through contactors.
The automatic control part is divided into temperature and humidity control and fault protection parts:
Temperature and humidity control compares the temperature and humidity of the return air with the user-set values via temperature and humidity controllers, and automatically operates components such as the compressor (for cooling and dehumidification), humidifier, and electric heater (for heating) to achieve automatic control of constant temperature and humidity.
Fault protection control uses combinations of pressure protection, timers, relays, overload protection, etc., to implement fault protection control for components such as the compressor, fan, and humidifier.
Unit Features:
1. Advanced Control:
The unit is controlled by intelligent instruments or a Programmable Logic Controller (PLC), offering high control accuracy and reliability. The unit's instruments can reserve a remote control interface, facilitating centralized remote control for users and saving management labor. Modern control technologies are fully applied to optimize the control model, ensuring the unit's operation mode adapts to changes in annual working conditions and improving the unit's seasonal energy efficiency ratio;
2. Multiple Protections:
The unit is equipped with protections such as high pressure, low pressure, overload, short circuit, phase loss, overheating, and low air pressure, as well as interlocking protections for water pumps and fire dampers;
3. The unit comprehensively uses scroll compressors (below 50Hp) with high energy efficiency ratio (EER) and semi-hermetic screw compressors (above 60Hp).
4. With the seasonal energy efficiency ratio (SEER) as the optimization goal, the system matching theory is fully introduced, and computer-aided design technology is widely adopted to optimize the design (selection) of structural parameters for each component of the refrigeration system, ensuring reasonable performance matching among components to form a complete whole, thus guaranteeing efficient and reliable operation under various working conditions throughout the year.
5. Modern control technologies are fully applied to optimize the control model, ensuring the unit's operation mode adapts to changes in annual working conditions and improving the unit's seasonal energy efficiency ratio.
6. Multi-functionality with a wide temperature control range (5~32℃) and high annual operation efficiency. A fresh air ventilator interface is reserved, allowing users to configure a fresh air ventilator. During transition seasons and winter, the unit can automatically introduce low-temperature outdoor air into the room to achieve ventilation and cooling, while also reducing the operation time of the main unit to save energy. This feature is particularly suitable for occasions requiring ventilation during transition seasons and cooling in winter.
7. The unit uses environmentally friendly working fluids, selects environmentally friendly materials, and adopts new technologies and processes that meet environmental protection requirements, ensuring the unit fully complies with environmental protection requirements throughout the entire process and in all aspects.
8. The unit can be equipped with an automatically controlled sterilization device to ensure clean indoor air in the air conditioning space.
Structural Features:
1. Compressor:
High-performance imported compressors are selected, which are safe, reliable, and have a high energy efficiency ratio.
2. Fan:
High-performance, low-noise centrifugal fans are used, featuring large air volume, high static pressure, low noise, and stable operation.
3. Heat Exchanger:
Processed using the American OAK production line, the heat exchange efficiency of the heat exchanger is greatly improved.
4. Outer Casing:
Indoor Unit: Processed using Japanese AMADA equipment, it has excellent appearance quality. For models below 30Hp, the frame adopts a popular new aluminum alloy arc-edge frame structure; for models above 40Hp, a new diamond-edge aluminum alloy frame structure is used, with a compact overall structure, beautiful and elegant appearance, and a strong modern style.
Outdoor Unit: The heat exchanger adopts a one-time bending forming technology, with a beautiful appearance and good heat exchange effect. The outer casing is made of high-quality steel plate with surface spraying or stainless steel material, so the unit will never rust when placed outdoors.
5. Humidifier:
High-performance humidifiers are selected, featuring good control performance, high humidification efficiency, and safety and reliability.
6. Heater:
Ribbed high-efficiency electric heating tubes are used, with small volume and high thermal conversion rate.
7. Refrigeration Accessories:
Accessories such as expansion valves, filters, solenoid valves, high and low pressure controllers, and pressure gauges are all brand products.
8. Defrosting Mechanism:
High-reliability components and high-performance control methods are adopted to ensure the safety and reliability of defrosting during low-temperature operation of the unit, as well as complete and thorough frost layer treatment, thereby improving the unit's heat exchange performance.
9. Insulation Layer:
High-performance insulation materials are used, with small thermal conductivity, high water resistance, anti-aging, flame retardancy, and non-toxicity.