After the golden flower tea blooms, the fresh golden tea flowers have high nutritional value, and some growers themselves eat fresh golden tea flowers. The fresh Camellia flower is not treated or cooked. First, it is difficult to release the nutrients of the golden tea without the treatment of the light. Second, the surface of the fresh flower is not treated with high temperature. Both can solve these two problems. There is a difference between the fresh golden scented tea and the dried golden scented tea. After the boiled tea is boiled, the golden broth will first appear. With the decrease of temperature, the golden scented tea broth will slowly change from golden yellow. red.
Fresh flower tea is certainly good, but the origin of Jinhuacha is only in Guangxi and the world. It is very difficult for others to drink fresh golden tea. In order to allow more people to drink golden tea, the golden tea is usually treated by freeze-drying or drying.
First, the golden flower tea is baked and dried. The drying method: high temperature treatment can easily lead to the loss of nutrient active ingredients of Jinhua tea. At the high temperature, the cell wall of Camellia sinensis will be destroyed, which will lose the nutritional value of Camellia sinensis, resulting in color change and flower pattern shrinking.
Drying golden tea
2. Golden flower tea freeze-dried is a golden tea lyophilized by a vacuum freeze dryer at low temperature. It not only retains the original color, odor, size and nutrient active ingredients of the golden flower tea, but also the microstructure of the golden tea after lyophilization. It is porous and easy to brew to release the nutrients of the flower tea.
Small vacuum freeze dryer
How is freeze-dried golden tea made? In fact, it can be divided into three parts: 1. preliminary preparation, 2. low temperature pre-freezing, 3. vacuum freeze-drying. The preliminary preparation is to prepare the equipment properly, pick up the fresh Camellia flower, and also carry out a series of preliminary work on the selection and cleaning of the Camellia tea; the low temperature pre-freezing is to freeze the ice in the fresh golden tea at minus 40 degrees. Then lyophilize under vacuum.
Superaudio induction heating equipment is mostly used for surface quenching of industrial metal parts. It is a kind of metal heat treatment method that makes the workpiece surface generate a certain induced current, quickly heat the surface of parts, and then quickly quench. Super audio induction heating equipment, that is, induction heating of the workpiece, in order to quench the surface of the equipment.
The principle of super audio induction heating equipment: it is the use of high frequency current flow direction is wound into a ring state or the shape of the heating induction coil, high frequency induction is usually made of red copper hollow pipe. A powerful magnetic beam that generates a transient change of polarity in a high-cycle induction coil places the metal in need of heat treatment in a high-frequency coil, and the magnetic beam penetrates the entire heated metal object. In the interior of the induction heating object and the induction heating current in the opposite direction, the corresponding strong eddy current. Because there is resistance in the induction heating metal, so strong joule thermal energy is generated, so that the temperature of the induction heating object rises rapidly, so as to achieve the purpose of heat treatment. Therefore, super audio induction heating equipment in the industry, can also be called: high frequency induction heating equipment; High and medium frequency induction quenching equipment; Induction diathermy equipment; High frequency quenching machine, high frequency induction heating machine, high frequency welding machine.
Performance and characteristics of super audio induction heating equipment:
Fast heating: the fastest heating speed is less than 1 second, (the speed can be adjusted and controlled)
Wide heating: can heat all kinds of metal workpiece (according to the different shape of the workpiece to replace the detachable induction ring)
Easy to install: connect the power supply, the induction ring and the water pipe can be used; Small size, light weight, very easy to use
Easy to operate: It can be learned in minutes
Quick start: heating can be started after the water is connected to the electricity
Less power consumption: about 70% power saving than the old vacuum tube high IF equipment, the smaller the workpiece, the smaller the power consumption
Good effect: heating is very uniform (can also adjust the density of induction ring, so that each part of the workpiece to obtain their own required temperature), fast heating, less oxide layer, no waste after annealing
Power adjustable: stepless adjustment of output power
Full protection: with over voltage, over current, over heat, water shortage and other alarm instructions, and automatic control and protection
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Ningbo Yufeng Electronics Co., Ltd , https://www.yufengheating.com