Friends who are familiar with high and low temperature test chambers know that the compressor is its core component, but how much do you know about the compressor? In this article, the high and low temperature test chamber manufacturers tell you how the compressor main engine works: we first understand him Structure: 1. Compressor; 2. Condenser; 3. Throttle valve; 4. Evaporator; High and low temperature test chamber manufacturers tell you about refrigeration compressors (1)
First talk about what is called refrigeration. The word "refrigeration" can only be said to be a technical term. Strictly speaking, it is wrong. No scientist in the world can create "cold". What is cold? Let me give an example: the temperature drops to -5 ℃, we said that the weather is really cold today, but the people in Northeast say it is not cold; in the sky, when the temperature is + 32 ℃, we will say that it is not hot, but the temperature suddenly drops to + 25 ℃, we will say that it is too cold The cold is determined by people's common sense, and there is no definition of cold in physics. In the project, cold is determined by the production needs. As the CEO asked, is the cold storage cold? You said cold, this cold refers to -18 ℃; the CEO asked, is the reservoir temperature stable? You said it is stable, the answer means that the reservoir temperature is stable at ± 0 ℃ This is the definition of cold in our industry. But we still call this method of using mechanical equipment to reduce the temperature of the cooling object to the required temperature, which is the term. What is refrigeration? For example, we put a kettle containing one kilogram of 20 ° C cold water on an iron plate that has been heated to 500 ° C. The water will be opened in a short time. If the kettle is not opened, the water will dry in a short time. Everyone said that the steel plate is heating the water, and conversely it can be said that the water is cooling the steel plate. Moreover, it can be calculated how many degrees it drops, because a kilogram of water rises from 20 ° C to 100 ° C, it needs 80 calories of heat from the outside, and water needs to provide 539 calories of heat from 100 ° C to dry. That is to say, one kilogram of 20 ℃ cold water is boiled to dryness, and the outside is required to provide 619 calories of heat. If it extracts 619 calories of heat from the outside world or steel plate and turns it into water vapor according to the angle of cooling, which makes the steel plate cool down, this is refrigeration, which uses water to cool the steel plate. If you pour water on a steel plate, it will be more intuitive. In the above refrigeration process, if the size of the steel plate is fixed and the cooling factor of the outside air is excluded, then how much the steel plate has fallen can be accurately calculated. The physical quantities such as 'calorie', 'temperature', 'calorie', and '° C' mentioned here can be understood by anyone who wants to learn physics. In junior middle school physics, heat is always transferred from objects with high temperature to objects with low temperature through conduction, convection, and radiation. After an object loses some heat, its temperature will also decrease. Our goal is to transfer the heat in the product and the air to the refrigerant that is cooler than the product through the refrigeration system, so as to reduce the temperature of the product.
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