73 results about "Normal concentration" patented technology

The invention discloses a varied concentration mixed working medium auto-cascade refrigerator, comprising four parts of a normal concentration loop, a first varied concentration loop, a second varied concentration loop and a third varied concentration loop; the normal concentration loop is provided with a compressor, a condenser, a rectifying device, a regenerator, a first throttling element, an evaporator, a second throttling element and a gas-liquid separator which are connected in turn, wherein the first varied concentration loop is provided with a third disconnecting valve 13, a liquid storage tank 9 and a fourth disconnecting valve 14 which are connected in turn; the second varied concentration loop is provided with a first disconnecting valve 11, a gas holder 7 and a second disconnecting valve 12 which are connected in turn; and the third varied concentration loop is provided with a fifth disconnecting valve 15, a gas holder 8 and a sixth disconnecting valve which are connected in turn. The invention dramatically improves the dynamic operation characteristics of the refrigerator at the stage to start lowering temperature, and can realize lower refrigerating temperature and improving thermal dynamic efficiency of the refrigerator. The invention is particularly applicable to the occasions not only needing rapid temperature reduction, but also needing lower refrigerating temperature, thus having favorable application prospect.

The invention discloses a manihot esculenta crantz rapid propagation method based on atomization nutrient solutions. The manihot esculenta crantz rapid propagation method comprises the steps that 1, one ends of 20-30 cm manihot esculenta crantz seed stems are place into cultivating pots at first, the other ends of the manihot esculenta crantz seed stems extend out of planting holes of a box body cover plate, 2-3 bud eyes are reserved outside the other ends of the manihot esculenta crantz seed stems, the planting holes are sealed, the nutrient solutions with the 1/2 concentration are added into the cultivating pots, and atomization cultivating is conducted for 30-35 days through an atomization device; 2, after the root systems of the manihot esculenta crantz seed stems touch the cultivating pots, lifting brackets are removed, the cultivating pots are directly placed on bearing platforms, the manihot esculenta crantz seed stems above the box body cover plate are fixed through a fixing device, and cultivating is continued with nutrient solutions with the normal concentration; and 3, after cultivating is conducted for 85-90 days, the manihot esculenta crantz seed stems located above the box body cover plate are cut into several segments, the step 1 to the step 3 are continuously repeated or cultivating is continued for 15-20 days, then the manihot esculenta crantz seed stems are transplanted to the field to be planted, and the temperature in a cultivating box body is controlled to be 20 DEG C-28 DEG C. The manihot esculenta crantz rapid propagation method based on the atomization nutrient solutions has the advantages that propagation can be conducted at any time, and the propagation rate and the survival rate are high.

The invention relates to a method for preventing an indoor swimming pool with a concrete structure from being eroded by chlorine gas. The invention has the technical scheme that non-prestressed steel bars which are processed by an advanced hot galvanizing method are adopted in posts and a roof with concrete structures; when prestressed steel bars are adopted in the concrete structure of the roof, the prestressed steel bars adopt non-adhesive prestressed steel stranded wires; the concrete contains polypropylene fiber, the consumption of which is 0.5-2.5 kg/m<3> concrete; and the weight ratio of chlorine ions to cement in the concrete of unit volume is smaller than or equal to 0.1%. In the method of the invention, the strength grade of the concrete can reach more than C40 grade, the swimming pool with the concrete structure can be safely used within the normal concentration range of chlorine ions, and the erosion caused by environmental factors is reduced. The adoption of the polypropylene fiber can obviously improve the durability of the concrete structure, thus compared with the common concrete, the anti-leakage capacity of the concrete containing the polypropylene fiber is improved by more than 70%, and the service life of the swimming pool is prolonged and can be prolonged by more than 60%. Therefore, the invention has better application value and popularization value.