The Working Principle of Electronic Expansion Valve in Constant Temperature and Humidity Test Chamber

As an electronic control element, the electronic expansion valve located in the constant temperature and humidity test chamber adjustment system has high accuracy, fast action, accurate action, and obvious energy-saving effect, which can realize the optimal control of the system and has a wide range of applications in environmental test equipment. But do you know how it works? Do you know the role of its design? Next, let's analyze the working principle of humidity chamberand design function of the constant temperature and humidity test chamber's electronic expansion valve.

The driving method of the electronic expansion valve is that after the controller of constant temperature and humidity test chamber calculating the parameters collected by the sensor, it sends an adjustment command to the drive board, and the drive board outputs electrical signals to the electronic expansion valve to drive the action of it. The electronic expansion valve takes only a few seconds from fully closed to fully open, with fast response and action speed, and there is no excessive static heating. Moreover, its open and closed state and speed can be set manually, which can adjust and control the amount of liquid refrigerant entering the evaporator well. For example, when doing a sixty-degree single temperature test, you can adjust the electronic expansion valve to reduce its opening to a suitable value. Simultaneously, the cooling capacity is relatively small, and the heating capacity balanced with it can also be reduced, so as to reduce energy consumption in both cooling and heating in order to achieve energy saving effect.

Japan began to study it in the late 1970s. At that time, it relied on the application of different voltages (0~12V) to heat the bimetallic strip, which caused the bimetallic strip to expand differently and drive the valve needle to rise and fall. It has significant drawbacks and has not been used much later. In addition to Japan, other countries also carried out research and development of electronic expansion valves in the 1980s, which was mainly for electromagnetic and electric (stepper motor drive) electronic expansion valves.

The expansion valve, also called the throttle valve, is the main component of the refrigeration system of the constant temperature and humidity test chamber, which is installed at the entrance of the evaporator and is the dividing point between the high pressure and the low pressure of the refrigeration system. Its function is to throttle and decompress the high-pressure liquid refrigerant from the receiver industrial drying ovens, adjust and control the amount of liquid refrigerant entering the evaporator to adapt it to the changes of the refrigeration load, and at the same time to prevent the compressor from the fluid hammer (that is, the unevaporated liquid refrigerant is compressed after entering the compressor, which can easily cause damage to the compressor valve) and abnormal overheating of the evaporator outlet vapor.

The above is the working principle and design function of the electronic expansion valve of the constant temperature humidity test chamberthat we share with you.

If you want to know more sorts of china climate chamber, please visit our website.

Other supplier products

	Corrosion Test Chamber	Corrosion tests are carried out to check the resistance of a material or a coating to the corrosion process which is triggered naturally with the r...
	Air-ventilation Aging Test Chamber	Model: YTAT-101 | YTAT-216 Main Parameters: Temperature range: RT+25℃～200℃（300℃） Temperature fluctuation: ±0.3C Temperature reso...
	Walk In Climate Chamber	Model: YWER-42000 Description of Walk-In Climate Chamber Walk In Climate Chamber, also called walkinenvironmentaltestchamberor walk in temper...
	Air Ventilation Aging Machine	Model: YTAT-101 Product Performance Temperature range: RT+25℃～200℃ Air ventilation volume: 5-200 (3-250) time/H N=3590(X-Y)x2/V ·...
	Customized 4 Doors Type Nitrogen Oven	Customized 4 Doors Type Nitrogen Oven Model: YNO-100-4 Main Parameters: Volume: 100L*4 Inner size: 50*45*45(w*h*d) Temperature range: ...

供应产品

Same products

	Xenon Arc Chamber	卖方: Xi’an LIB Environmental Simulation Industry	LIB xenon lamp testchamber can be used for aging tests such as color fastness and cracking of coa...
	Water Spray Test Chamber	卖方: Xi’an LIB Environmental Simulation Industry	LIB Water Spray Test Chamberis used for the ingress protection tests involves immersing the equip...
	Salt Spray Chamber	卖方: Xi’an LIB Environmental Simulation Industry	LIB salt spray chamber simulates the salt fog marine climate, is used in the salt spray corrosion...
	Salt Fog And So2 Corrosion Chamber	卖方: Xi’an LIB Environmental Simulation Industry	LIB salt fog machineand SO2 corrosion chamber generates the different environment conditions that...
	Reach-In Environmental Chamber	卖方: Xi’an LIB Environmental Simulation Industry	LIB reach in stability chamberssimulate different environmental conditions such as high temperatu...