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Views: 295 Author: Kaylee Publish Time: 2023-10-12 Origin: Site
The constant temperature and humidity test chamber is a device used to test the performance of materials in various environments and to test their heat resistance, cold resistance, dry resistance, and moisture resistance. It is suitable for conducting quality inspections on a wide range of items, such as those categorised as electronics, electrical, mobile phones, communication, instruments, vehicles, plastic products, metals, food, chemical, construction materials, medical, aerospace, and so on.
Our company offers a constant temperature and humidity test box that has an arc-shaped body and a surface that has been treated with fog stripes. This gives the box a look that is of a high quality and gives it the ability to provide accurate readings. This facility right here at our organisation is where the production took place. The fact that it is both flat and devoid of a reaction handle contributes to the ease with which it may be utilised, in addition to the fact that it is reliable and secure. The rectangular window made of laminated glass that is laminated on both sides and serves as an observation window also enables testing and observation to take place. The window is created such that it is laminated on both sides. In order to avoid water condensation and droplets of water from forming on the glass surface of the window, an anti-sweat electric heating device has been installed in the window. This has been done in order to keep the window from sweating. In addition to that, high-brightness PI fluorescent light bulbs are utilised inside to ensure that there is a constant level of illumination throughout the space. Because it has holes for testing as well as these holes, it is feasible to link it to external testing power or signal cables. This is conceivable due to the fact that it has holes for both testing and these holes. Because it has two levels of sealing, the door is in a position to adequately isolate any leaking of internal temperature. This keeps the temperature from fluctuating unnecessarily. When the system is outfitted with an external water supply system, it is easy to replenish the water supply to the humidifier drum, and it will automatically recycle the water that has been used up. When the system is not outfitted with an external water supply system, the humidifier drum will not recycle the water. integrated moveable pulley that is not only simple to move and position but also comes with a secure positioning screw for the purpose of fastening whatever it is that you want to secure.
It is possible to successfully remove the lubricating oil from the space between the condenser tube and the capillary tube thanks to the French "Taikang" brand, which is employed in the compressor circulation system. The circulatory system is responsible for making this happen. This appliance makes use of a particular kind of refrigerant known as R404L, which is an abbreviation for "American Lianxing Environmental Refrigerant."
The controller features a genuine touch screen that was purchased from another country and imported into the United States. The screen is 7 inches in size and has the capability of displaying measured values in addition to those that were provided. It is possible to manually alter the test parameters for both temperature and humidity, and the data acquired during the tests may be downloaded immediately by USB. The data can also be saved to a file. The duration of time that can be noted in this section cannot exceed three months at any point.
The constant temperature and humidity test chamber has six main structures, which are:
The great majority of sensors are designed to initially concentrate on the temperature and humidity readings that they produce. Platinum electrodes and thermal resistors are the two varieties of temperature sensor that are most frequently used. The measurement of temperature can be accomplished with one of two types of sensors. Either the dry hygrometer method or the solid-state electronic sensor instantaneous measuring method can be used to determine an environment's relative humidity. Both of these methods are described in more detail below. Both of these methods can be utilised in tandem with one another to get the desired results. Wet zone balls are being gradually phased out in favour of solid sensors in the industry's most recent iteration of constant temperature and humidity chambers as a direct result of the wet zone ball method's somewhat subpar accuracy in monitoring. This is because solid sensors are gradually replacing wet zone balls, which is the reason why this has come to pass. These chambers are constructed with the capability of maintaining a temperature and humidity level at a constant level at all times.
The components that make up the gas circulation system are a centrifugal fan, a cooling fan, and an electric motor. The electric motor is what drives the operation of the system under normal conditions, as it is the only component that is powered by electricity. It is a system for recirculating the gas that is confined within the experimental chamber, and its function is provided by this component.
In contrast to the refrigeration unit in that room, the heating system software in the environmental test room is very user-friendly. This is because the room also has an environmental chamber. The vast bulk of its structure is made up of wires, which are notorious for their high resistance when it comes to the flow of electrical current. Because of the high temperature increase speed that is specified in the environmental test box, the output power of the heating system software in the environmental test box is fairly high, and an electric heater is also mounted on the bottom plate of the environmental test box. This is done in order to meet the requirements of the environmental test box. In order to fulfil the requirements of the high temperature increase speed, it is essential that both of these characteristics be present. Both of these attributes might be discovered in the structure at some point.
The automatic control system is the most important component of a comprehensive environmental test chamber since it is the component that determines the most important metrics, such as the rate at which the temperature rises and its accuracy. These days, the PID control method is utilised almost entirely on the control board of the environmental test chamber, while the operation method that is built of PID and controller design is only used in a small portion. Difficulties are typically difficult to come about as a result of the fact that the automatic control system falls primarily within the purview of mobile software and that this component is used throughout the entirety of the application process.
The refrigeration unit is an important part of a comprehensive environmental test chamber. Generally speaking, the cooling method is mechanical equipment cooling and auxiliary liquid nitrogen cooling. The mechanical equipment cooling uses steam reduction cooling, which is mainly composed of a refrigeration compressor, a cooler, a throttle valve organization, and an air conditioning evaporator. The refrigeration unit of the constant temperature and humidity box consists of two parts, each referred to as the high temperature part and the ultra-low temperature part. Each part is a relatively separate refrigeration unit. The volatilization, digestion, and absorption of the cold coal in the high temperature part come from the heating and gasification of the ultra-low temperature part of the refrigerant, while the volatilization of the ultra-low temperature part of the refrigerant is obtained through the endothermic reaction of the target being cooled/gas in the experimental chamber to obtain refrigeration capacity. The high temperature part and the ultra-low temperature part are connected by a volatile cooler between them, which is both the cooler for the high temperature part and the cooler for the ultra-low temperature part.
Both humidification and dehumidification are treated as separate subsystems within the software that controls the temperature system. The steam humidification method is the one that is employed the majority of the time as the humidification method, and bottom pressure steam is introduced into the laboratory space as quickly as possible for the aim of humidifying the air inside. This sort of humidification method is able to function at a faster speed, increase humidity, and be operated in a flexible manner. This is quite helpful when it comes to finishing the necessary humidification when the temperature is lowering because it is very easy to do so.
