Low temperature/low humidity constant temperature and humidity machine

Low temperature/low humidity constant temperature and humidity machine

Our company is the earliest pioneer and practitioner of low-temperature constant temperature and humidity machines and low humidity constant temperature and humidity machines in the domestic refrigeration industry, and is also a professional manufacturer specializing in the standardized production of such products in China. Having rich experience and a wide market in this field, its products and quality have received high praise from users.
The low-temperature constant temperature and humidity machine product is suitable for use in environments where constant temperature and humidity are required, such as grain storage, developing film storage, and the preservation of valuable cultural relics, with room temperature ranging from -5 to 18 ℃ and relative humidity ranging from 50 to 75%. It is highly popular in the market.
Low temperature constant temperature and humidity machine products are suitable for use in situations where room temperature is 5-28 ℃ and relative humidity is 25-45%, requiring constant temperature and humidity. They can meet the requirements of special drying processes such as glass vacuum coating and high-energy battery raw material storage.

Unit Overview：
This series of unit air conditioning units is a series of air conditioning equipment developed by our company based on years of experience in air conditioning research and development, combined with the latest technological developments. It is a key research project of our company for many years, and the technical performance and type specifications of the products are at the leading level in China. This product adheres to the design concept of "efficiency, energy saving, environmental protection, and health", and is a high-performance product manufactured for users that meets the new characteristics of the 21st century. The overall design of the product is reasonable, with advantages such as full functionality, compact structure, small volume, light weight, low noise, safe operation, and high reliability. Can be widely applied in national defense, scientific research, cultural and educational health, and pharmaceutical industries; And air conditioning in different environments such as factories, hotels, and shopping malls.
working principle:
The operation of a constant humidity machine system is achieved through three interconnected systems: refrigerant circulation system, air circulation system, and electrical self-control system;
Refrigerant circulation system:
The liquid refrigerant in the evaporator absorbs heat from the air (the air is cooled and dehumidified) and begins to evaporate. Eventually, a certain temperature difference is formed between the refrigerant and the air, and the liquid refrigerant completely evaporates into a gaseous state. It is then sucked in and compressed by the compressor (pressure and temperature increase), and the gaseous refrigerant absorbs heat through the condenser (air-cooled/water-cooled) and condenses into a liquid. After being throttled by an expansion valve (or capillary tube), it becomes a low-temperature and low-pressure refrigerant that enters 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 (for cooling and dehumidification), humidifier, and heater (for heating) before being sent to the user's desired space through the air supply outlet. The air sent out mixes with the air in the space and returns to the return air outlet.
Electrical self-control system:
Including power supply and automatic control parts.
The power supply part supplies power to compressors, fans, humidifiers, etc. through contactors.
The automatic control is divided into temperature and humidity control and fault protection parts:
Temperature and humidity control is achieved by comparing the temperature and humidity of the return air with the user set temperature and humidity through a temperature and humidity controller, and automatically operating components such as compressors (cooling, dehumidification), humidifiers, and electric heaters (heating) to achieve automatic control of constant temperature and humidity.
Fault protection control is achieved through the combination of pressure protection, delay devices, relays, overload protection, etc., to control the fault protection of components such as compressors, fans, humidifiers, etc.
Unit characteristics:
1. Advanced control:
The unit is controlled by intelligent instruments or programmable logic controllers (PLCs), which have high control accuracy and good reliability. The unit instruments can reserve remote control interfaces, making it convenient for users to remotely control and save management manpower; Fully apply modern control technology, optimize control models to ensure that the operating mode of the unit adapts to the changes in working conditions throughout the year, and improve the seasonal energy efficiency ratio of the unit;
2. Multiple protections:
The unit is equipped with high voltage, low voltage, overload, short circuit, phase failure, overheating, underwind pressure protection, as well as interlocking protection for water pumps and fire dampers;
3. The unit fully adopts high-efficiency (EER) scroll compressors (below 50Hp) and semi enclosed screw compressors (above 60Hp).
4. Taking seasonal energy efficiency ratio (SEER) as the optimization objective, the system matching theory is comprehensively introduced, and computer-aided design technology is widely used to optimize the structural parameters of each component of the refrigeration system, so that the performance matching between the components in the system is reasonable, and it can form a complete whole to ensure efficient and reliable operation under various working conditions throughout the year.
5. Fully apply modern control technology, optimize control models to ensure that the operating mode of the unit adapts to changes in working conditions throughout the year, and improve the seasonal energy efficiency ratio of the unit.
6. One machine with multiple uses, wide temperature control range (5-32 ℃), and high annual operating efficiency. There is a fresh air exchange interface left, and users can configure a fresh air exchange. During transitional seasons and winter, the unit can automatically introduce low-temperature outdoor air into the room to achieve the purpose of ventilation and cooling, while also reducing the running time of the main unit to achieve energy conservation. This feature is particularly suitable for situations that require ventilation during transitional seasons and cooling during winter.
7. The unit uses environmentally friendly working fluids, selects environmentally friendly materials, and adopts new technologies and processes that meet environmental requirements to ensure that the unit meets environmental requirements throughout the entire process and in all aspects.
8. The unit can be equipped with an automatic sterilization device to ensure clean air in the air-conditioned room.
Structural features:
1. compressor:
Choose high-performance imported compressors that are safe, reliable, and have high energy efficiency.
2. Fan:
Adopting high-performance and low-noise centrifugal fans, it has the advantages of large air volume, high static pressure, low noise, and smooth operation.
3. Heat exchanger:
Introducing the OAK production line from the United States for processing greatly improves the heat exchange efficiency of the heat exchanger.
4. Shell:
Indoor unit:Using Japanese AMADA equipment for processing, it has excellent appearance quality. The framework below 30Hp adopts the popular new aluminum alloy arc frame structure at home and abroad; Above 40Hp, a new diamond edge aluminum alloy frame structure is adopted, which is compact, aesthetically pleasing, and highly modern.
Outdoor unit:The heat exchanger adopts one-time bending forming technology, which has a beautiful appearance and good heat transfer effect. The shell is made of high-quality steel plate surface spray coating or stainless steel material, and the unit will never rust when placed outdoors.
5. Humidifier:
Choose high-performance humidifiers with good control performance, high humidification efficiency, safety and reliability.
6. Heater:
Adopting ribbed high-efficiency electric heating tubes, with small volume and high thermal power conversion rate.
7. Refrigeration accessories:
Famous brand products are selected for accessories such as expansion valves, filters, solenoid valves, high and low pressure controllers, pressure gauges, etc.
8. Defrosting mechanism:
Adopting highly reliable components and high-performance control methods 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 increasing the heat transfer performance of the unit.
9. Insulation layer:
Using high-performance insulation materials, with low thermal conductivity, high water resistance, anti-aging, flame retardant, and non-toxic properties.
10. Multiple protections:
The unit is equipped with high voltage, low voltage, overload, short circuit, phase failure, overheating, underwind pressure protection, as well as interlocking protection for water pumps and fire dampers.
11. Control method:
The constant temperature and humidity unit adopts high-performance programmable control instruments. High control accuracy and good reliability. The instrument is reserved with a remote control interface, which can facilitate users to remotely control and save management manpower.
Model designation description:

Model example:HF19N refers to an air-cooled unit air conditioning unit with a nominal cooling capacity of 19kW and a compressor placed indoors.
Air cooled low temperature/Low humidity typeconstant temperature and humidity machinePerformance parameter table:

Water cooled low temperature/Low humidity typeconstant temperature and humidity machinePerformance parameter table:

Unit nominal operating conditions:
Note: The L-type unit is a single cooling type without heating device or heating capacity.