The constant temperature and humidity test chamber is designed to simulate various environmental conditions by maintaining specific temperature and humidity levels. This allows for testing a product's resistance to high temperatures, low temperatures, and humidity. The chamber is equipped with multiple functions, including heating, cooling, humidifying, and dehumidifying, making it a versatile tool for quality assurance and product development.
Cooling is a critical component of the test chamber, playing a vital role in determining its overall performance. The cooling system typically consists of four main parts: a compressor, condenser, expansion valve, and evaporator. The compressor acts as the heart of the refrigeration system, drawing in low-temperature, low-pressure gas and compressing it into high-temperature, high-pressure gas. This gas then releases heat through the condenser, turning into a liquid. The cooled liquid passes through the expansion valve, reducing its pressure, and enters the evaporator, where it absorbs heat from the surrounding air, turning back into a low-temperature, low-pressure gas. This cycle continues, enabling the chamber to maintain a stable and controlled environment.
Heating is another essential function in the test chamber, crucial for regulating temperature. When the controller receives a heating command, it sends a voltage signal (typically 2–13 VDC) to the solid-state relay. This activates the relay, allowing current to flow to the heater. The heater then generates heat, which is distributed throughout the chamber via a circulating fan. As a result, the temperature rises quickly to the desired level. The controller continuously adjusts the power supplied to the heater using on-off regulation, ensuring precise temperature control. For temperatures above 89°C, this method works effectively. However, for lower temperatures, a balance between heating and cooling is maintained, with the solid-state relay controlling the heat output while the compressor manages the cooling process.
Dehumidification is also handled by the refrigeration system. The evaporator, located inside the chamber, becomes very cold. When high-humidity air comes into contact with the evaporator, moisture condenses into liquid and is removed from the air, gradually lowering the humidity level within the chamber.
Humidification, on the other hand, is achieved by heating water to produce steam, which is then released into the chamber. This process increases the humidity level, completing the full range of environmental simulation capabilities that the constant temperature and humidity test chamber offers.
Lip Stick
Lipstick, a cosmetic that is applied to the lips to make them red and bright, is a cosmetic that is mainly used on the lips and can increase the color of the lips or change the color of the lips. It is one of the important makeup.
First of all, before applying lip balm, you must wash your lips, and then apply a layer of lip balm or anti-crack ointment to protect your lips and prevent cracks, so as to better make up. Shade your lips with foundation or masking cream.
Next, use a lip liner to outline the ideal line, with the lips naturally relaxed, so that you can better observe the shape of the lip line. Draw in the order of the upper and lower lips, with the upper lip closed and drawn from the center to the sides. The bottom lip is drawn from the sides toward the center. If you don't want to accentuate your lips, you can skip the line. Hold a lipstick or lipstick-stained lip brush between your thumb and forefinger. Press your pinky finger against your chin to hold and support the handle. Trace the lip hill and the center of your lower lip to determine the thickness of your lip.
Then, from the corners of the upper lip to the middle of the lip, and from the corners of the lower lip to the middle of the lip, with the lips slightly open to create a better line. Pay attention to the balance between left and right. After applying the outside, gradually apply to the inside until it is all over. Press lightly on your lips with a face paper to remove excess oil. Press, slightly open the lips, the effect can reach the inside of the lips. Plump up your lips by applying a glossy lipstick or an accent silvery lipstick in the center of your lips.
Lip Stick,Matte Lipstick,Nude Lipstick,Long Lasting Lipstick
DONGGUAN VOLES COMMODITY CO., LTD , https://www.volesvip.com