Purification Air Cooled Constant Temperature And Humidity Air Conditioner ZJHF Model

1. Temperature and humidity control in air conditioning system adopts the world famous brand rotor and vortex compressors, with high energy efficiency ratio, 20% energy saving compared with traditional reciprocating compressors, more sufficient cooling capacity, lower operating noise, more reliability and longer life; adopts automatic Thermal expansion valve, dry filter. Refrigeration components such as valves can give full play to the performance of the compressor and effectively protect the compressor.

2. The fan is directly driven by the outer rotor motor, which has the advantages of low noise, large air volume, high efficiency, compact structure, etc.;

It can overcome problems such as belt slipping, loosening, and replacement.

3. High-performance electronic electrode humidifier: no bacteria, no pollution to indoor air; no special requirements for water quality, no water treatment; independent humidifier control board, automatic timing water cleaning, prolong service life, can automatically according to humidification requirements Control the water level and humidification electrode current to achieve high-precision control and truly meet the high-precision requirements;

4. Improve the protection device to ensure the safe operation of the equipment: power supply phase loss, phase error, compressor overcurrent, high and low pressure, delay protection, fan overload, electric heating overheating, pressure difference type wind loss protection device, etc.;

5. Equipped with complete operation and fault indicator lights and switches, the operation is clear at a glance;

6. Imported microcomputer precision controller: LCD temperature and humidity display, user parameter setting, easy operation and precise control; high-precision temperature and humidity sensor, which can automatically realize temperature and humidity control; imported famous brand contactors, relays and other electrical components;

7. All stainless steel condensate pan and bottom water pan, electrostatically sprayed sheet metal shell;

8. The Air conditioning and humidity control system is divided into water-cooled, split air-cooled and integrated air-cooled structures to meet the requirements of different use occasions;

9. Cooling capacity range of the unit: 7.5kW - 313.5kW; Control range: 18~25℃, 50~70%RH.

10.Stable performance, high-efficiency energy-saving purification constant temperature and humidity air-conditioning unit adopts scroll compressors of internationally renowned brands, optimized configuration of systems and controls.

1. Refrigeration System: The refrigeration system is one of the key parts of the constant temperature and humidity machine. Generally speaking, the refrigeration methods are mechanical refrigeration and auxiliary liquid nitrogen refrigeration. Mechanical refrigeration adopts vapor compression refrigeration, which are mainly composed of compressors, condensers, throttling mechanisms and evaporators. If the temperature of our test is as low as -55°C, single-stage refrigeration is difficult to meet the requirements, so the refrigeration method of constant temperature and humidity machines generally adopts cascade refrigeration. The refrigeration system of the hvac temperature and humidity control consists of two parts, called the high temperature part and the low temperature part, each part is a relatively independent refrigeration system. The evaporation of the refrigerant in the high-temperature part absorbs the heat from the refrigerant in the low-temperature part and vaporizes; the evaporation of the refrigerant in the low-temperature part absorbs heat from the object to be cooled (the air in the test machine) to obtain cooling capacity. The high temperature part and the low temperature part are connected by an evaporative condenser, which is not only the condenser of the high temperature part, but also the condenser of the low temperature part.

2. Heating System: Compared with the refrigeration system, the heating system is relatively simple. It is mainly composed of high-power resistance wires. Due to the high heating rate required by the test, the power of the heating system is relatively large, and a heater is also installed on the bottom plate of the testing machine.

3. Control System: The control system is the core of the comprehensive test chamber, which determines the heating rate, precision and other important indicators of the testing machine. At present, most of the controllers of testing machines use PID control, and a small part of them use the combination of PID and fuzzy control. Because the control system basically belongs to the category of software, and this part generally does not have problems during use.

4. Humidity System: The temperature system is divided into two subsystems: humidification and dehumidification.

The humidification method generally adopts the steam humidification method, that is, the low-pressure steam is directly injected into the test space for humidification. This humidification method has high humidification ability, fast speed, and sensitive humidification control, especially when the temperature is lowered, it is easy to realize forced humidification.

5. Sensor System: The sensors are mainly temperature and humidity sensors. Platinum electric groups and thermocouples are widely used in temperature sensors. There are two methods of measuring humidity: wet and dry bulb thermometer method and solid-state electronic sensor direct measurement method. Due to the low measurement accuracy of the dry-wet bulb method, the current constant temperature and humidity chambers are gradually replacing the dry-wet bulb with solid-state sensors to measure humidity.

6. Air Circulation System: The air circulation system generally consists of a centrifugal fan and a motor that drives it. It provides circulation of air within the testing machine.

7. Purification System: It can be filtered under normal temperature and humidity, but it is basically a preliminary effect, up to G4. Purifying air conditioners are usually two-stage purification (G4+F8)

1. The outdoor unit and the indoor unit of the air-cooled unit should be as close as possible to minimize the number of elbows in the refrigerant pipeline.

2. Both the outdoor unit and the indoor unit of the air-cooled unit should add rubber pads between the frame and the support to reduce the transmission of vibration.

3. The connecting gas pipe and fluid pipe must be insulated. Do not weld the two together. For convenience and support, they can be tied together, but they must be separated from each other by insulating materials. Fiberglass insulation and sealing material reduce vibration and maintain some flexibility.

4. Close the shut-off valves of the outdoor unit and the indoor unit. After the connecting pipes are welded, leak detection must be done. After proper vacuuming and drying, if there is a need to replenish refrigerant, fill the port next to the liquid shut-off valve with liquid refrigerant.

A: Conductivity 125-1250MS/CM B: Water hardness 15-30 German degrees C: Inlet water pressure 0.1-1.0Mpa D: Inlet water temperature: 10-40℃

5. The drainage pipe should extend out of the building, and its drainage should not flow downstream to the wall.

6. When starting up for the first time or restarting after a long shutdown, the power must be turned on in advance to heat the crankcase for at least 6 hours.

(unless the surface temperature of the compressor is at least 10°C higher than the ambient temperature)

7. The surface of the condenser evaporator should be kept clean and cleaned regularly.

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