High-precision constant temperature and humidity air conditioner

Principles Introduction

1. Cooling Principle

High-pressure liquid refrigerant flows out through a filter and enters the evaporator after undergoing throttling and pressure reduction via a capillary tube. Due to the lowered pressure, the refrigerant continuously absorbs heat—transferred from the air to the evaporator—and evaporates into a vapor. This vapor is then drawn into the compressor; the resulting high-temperature, high-pressure gas enters the condenser, where its heat is dissipated and carried away. The refrigerant then reverts to a high-pressure, low-temperature liquid state before passing through the filter and returning to the capillary tube. This continuous cycle effectively transfers indoor heat to the outdoors, thereby lowering the indoor temperature.

2. Heating Principle

When the temperature of the conditioned air falls below the desired setpoint, the computer controller of the constant temperature and humidity unit activates the electric heater. The air is heated and subsequently circulated into the room by a fan, thereby achieving the objective of heating.

3. Dehumidification Principle

When the temperature of the conditioned air exceeds the desired setpoint, the compressor is activated to initiate cooling. As the air passes through the evaporator, it is cooled to a temperature below its dew point; this causes the moisture within the air to condense and precipitate out, thereby achieving the objective of dehumidification.

4. Humidification Principle

When the relative humidity of the conditioned air falls below the desired setpoint, the computer controller of the constant temperature and humidity unit activates the humidifier. The humidifier heats water to a boiling point, generating steam which is then circulated into the room by a fan, thereby achieving the objective of humidification.

Application Areas

• Laboratories, museums, archives, art galleries, material preservation facilities, testing rooms, and similar sectors

• Fiber testing, metrology, scientific experimentation, specialized storage facilities, military applications, and similar venues

• Facilities where the working environment requires specific temperature and humidity conditions

• Data centers with stringent requirements regarding environmental temperature and humidity
  
  

  Chemical Analysis

  
  

  Optical Experiments

  
  

  Museums

  
  

  Aeronautical Research

  
  

  Electronics Workshop

  
  

  Weighing Room

  
  

  Archives

  
  

  Equipment Room

  
  

Features

High Reliability

• Features top-tier international brand compressors (Hitachi, Panasonic, or Copeland)—fully hermetic scroll compressors—which, compared to traditional compressors, offer superior energy efficiency, enhanced reliability, smooth operation, and low noise levels.

• Low-Noise Centrifugal Fans: Deliver high airflow and high static pressure, feature superior dynamic balancing, and ensure smooth operation (EC fans available as an option).

• Equipped with Emerson filters and temperature/humidity sensors utilizing Swiss-imported chips; comes standard with core electrical components from Schneider Electric and high/low-pressure switches from Danfoss—a premium configuration designed to provide complete peace of mind.
  

High Security

• PTC Ceramic Electric Heating: Features high voltage withstand capability, low leakage current, low power consumption, full flame retardancy, rapid response time, long service life, and ensures safety and reliability (electric heating tubes are available as an option).

• Equipped with a comprehensive suite of protection functions, including safeguards against overload, overvoltage, overheating, undervoltage, phase sequence errors, phase loss, and insufficient air pressure, as well as audible and visual alarms.

• Upgraded Leak Prevention Design: The unit is configured with a dual-layer stainless steel condensate drip tray. This tray is formed from a single piece of metal using a precision bending process—replacing traditional single-layer tray designs—thereby significantly reducing the risk of water leakage.

High Convenience

• Modular Functional Sections: Designed for specialized inspection and maintenance, featuring an ergonomic layout.

• Intelligent Control System: A custom-developed microcomputer control system by Klinair, featuring a 7-inch touchscreen for precise control and user-friendly operation.

• System Compatibility: The control system is compatible with the most widely used Building Management Systems (BMS), such as Modbus and DLL. It supports various protocols—including RS485/232 and TCP/IP—making remote monitoring easily accessible at your fingertips.

High Adaptability

• Versatile Air Supply Options and Full Frontal Maintenance Access: Indoor unit configurations include cabinet-style, horizontal, ceiling-mounted, and ducted types; outdoor units offer a choice of top or side air discharge; and a selection of eco-friendly refrigerants—such as R410A and R407C—is available to meet diverse user requirements.

• Optional Features: Mobile App remote monitoring, photocatalytic sterilization and purification modules, ozone generation units, electrostatic medium-efficiency filtration, and DCS monitoring systems.

Advantages

• Precise Control

HVAC has custom-developed a PID control system, achieving temperature control accuracy of ±0.1°C and humidity control accuracy of ±1.5%.

•  Professional Design

The unit features a modular structural design utilizing 1:1 3D SolidWorks modeling. This allows for realistic visual simulation of the equipment's appearance, thereby enhancing the precision of customized products.

The system offers flexible configuration options and functional expandability, while ensuring quick and hassle-free maintenance operations.

• Powerful Functionality

Multiple units can be configured for rotational switching (load sharing). The system supports data acquisition and export (in Excel or Word formats), allows for the querying of temperature and humidity monitoring curves, and facilitates data copying via USB drive.

•  Excellent Thermal Insulation

The unit's inner wall panels utilize high-density, low-thermal-conductivity rubber-plastic insulation as a core filling material. This design not only enhances the structural strength of the cabinet panels but also guarantees superior thermal insulation performance.

•  Optional Features

The equipment can be pre-configured with an interface for fire alarm systems; upon receiving a fire signal, the unit will automatically shut down. Manual reset is required once the fire signal has cleared.

An interface for combustible gas sensors can also be provided; should the concentration of combustible gases in the air reach hazardous thresholds, the unit will automatically shut down and trigger an alarm signal.

Selection Criteria

The selection of a constant temperature and humidity precision air conditioning system requires a comprehensive assessment of multiple factors. It is not merely a matter of meeting on-site requirements—such as specific temperature, humidity, and air cleanliness levels—but also of ensuring the equipment's long-term, stable operation. Consequently, our products are tailored to the specific on-site usage conditions and installation environments of our clients, thereby guaranteeing stable, trouble-free performance over the long term. Upholding a steadfast commitment to client responsibility, our commercial team strives to meticulously gather and verify the following information for every engineering project, ensuring the utmost accuracy of the preliminary solution proposals.

Case Studies