TEMAK temperature and humidity test chamber six frame structure introduction

Temperature and humidity test chamber is electronic and electrical engineering, aviation, automotive, home appliances, scientific research and other areas of essential test chamber, mainly used for high temperature, low temperature, alternating hot and humid or constant hot and humid test, in the use of the test chamber, many people are not too clear about the structure of its box is how to make up, the following TEMAK small make up on this issue for you to make a detailed introduction.

TEMAK temperature and humidity test chamber of the six frame structure:

The controller

      The key to the controller is the temperature and humidity sensors. Temperature sensor used more platinum resistance and RTD.

Ambient humidity measurement method has two kinds: wet and dry bulb thermometer method and solid state hard disk electronic controller immediately measurement method. Temperature and humidity test chamber solid state hard disk controller than the wet zone ball method of measurement accuracy.

Heating

      Heating system software is very simple relative to the refrigeration unit. It is the key by the high-power resistance wire composition, because the test chamber temperature rate is very large, and thus the temperature and humidity test chamber heating system software output power are larger, and in the test chamber is also equipped with an electric heater under the bottom version of the heater.

Control

      Automatic control system is the key to the comprehensive temperature and humidity test chamber, it decides the test chamber temperature speed, precision and other key indicators of value. Most of the control board of the temperature and humidity test chamber choose PID manipulation.

Exhaust air circulation

      Gas breathing system consists of centrifugal electric fan and drive running motor, which forms the gas circulation system in the test chamber.

Humidity system

      Temperature system software is divided into humidification and dehumidification 2 subsystems. Humidification method is usually selected steam humidification, low-pressure steam immediately introduced into the experimental room space humidifier. This type of humidifier way to humidify the ability to work faster, humidifier manipulation dexterity, and in the reduction of temperature is easy to establish mandatory humidification.

Dehumidification method has two kinds: mechanical equipment cooling dehumidification and drying dehumidification. Mechanical equipment cooling dehumidification dehumidification basic principle is to evaporate cooling to the humidity content of the following, so that more than the saturation state of the humidity content of water vapor condensation and dissolution, so that the reduction of environmental humidity. Air dryer dehumidification is the use of air pumps will be pumped out of the gas in the experimental area of the temperature and humidity test chamber, and the introduction of dry gas, together with the wet air into the use of the dryer can be recycling system to carry out the drying, drying and then into the experimental box, so that the continuous cycle of the system to carry out dehumidification.

Refrigeration

      Refrigeration unit is an important part of the comprehensive test chamber. Refrigeration method by mechanical equipment refrigeration and its auxiliary refrigerant refrigeration components.

      Mechanical equipment refrigeration selection of vapor reduction type refrigeration, the key by the refrigeration compressor, throttle organization and air conditioning evaporator composition. If the experimental temperature ultra-low temperature to exceed -56 ℃, monopole refrigeration can not meet the requirements, usually choose the compound stacked refrigeration.

Temperature and humidity test chamber refrigeration unit consists of two parts, respectively known as the high temperature part and ultra-low temperature part, each part is a relatively separate refrigeration unit. The volatile digestion of refrigerant in the high-temperature part absorbs the heat from the refrigerant in the ultra-low-temperature part and gasifies; the volatile of refrigerant in the ultra-low-temperature part exotherms from the constructive function (the gas in the experimental box) cooled by the water in order to obtain the cold quantity. The high temperature part and the ultra-low temperature part are connected with an evaporative condenser in the middle, which is the cooler of the high temperature and the cooler of the ultra-low temperature part.

TEMAK temperature and humidity test chamber advantages:

1, the insulation layer is made of 2mm thick double 316 stainless steel, the center folder thickness of 10-15CM PU high-density foam cotton, test box insulation effect is better;

2, the temperature sensor used is a high precision A-class PT100 platinum resistance;

3, humidity sensor according to the size and type of test box is divided into two kinds of different: one is the wet and dry bulb than the method, the use of A-class PT100 platinum resistance; the second is the electronic high-precision imported humidity sensor;

4, 1m ³ temperature and humidity test chamber using a double 90-watt fan, thickness 10CM large air volume drum;

5, the electric wire used is nickel-chromium alloy, high temperature corrosion resistance, good antioxidant performance; insulation material used is ceramic material, not easy to scale, aging resistance effect is good, longer service life;

6, the humidity of the outer encapsulation of the electric heating tube is corrosion-resistant 316 stainless steel material, with good resistance to chloride erosion performance;

7, the duct can be customized according to customer demand design; temperature and humidity test chamber evaporator, wind drum, electric heating design placement are based on the test required to design a reasonable air duct circulation system out of the wind uniformity, TEMAK constant temperature and humidity test box in the overall temperature and humidity uniformity effect is good, in the national rankings in the first place;

8, the evaporator adopts a large pitch fin evaporator, the use of corrosion-resistant, high thermal conductivity of the fin material, internal threaded copper tube, fin material surface is specially treated aluminum alloy material, better thermal conductivity.