The role and advantages,disadvantages of plate heat exchangers

Plate heat exchangers are a type of mobile device that transfers heat between metal plates because the liquid is spread over more surfaces, which increases the exchange rate. Metal tubes are used to heat fluids.

The role of plate heat exchangers
The plate heat exchanger is based on different external and internal components, the welding plate exchange plates are welded together, and the brazed plate type construction model is vacuum brazed. In many cases, in order to make smaller sections work better, some chambers are designed to be thinner, allowing most of the liquid to contact the plate, improving heat transfer.

The plate heat exchanger can play a good heat transfer effect in the boiler heating in winter. In the daily use process, it is necessary to do a good job of protecting this equipment. The plate heat exchanger is a kind of equipment that can play multiple benefits and functions for us. The user clearly knows its role and protects it so that it can play a greater role.

Advantages of plate heat exchangers
High heat transfer coefficient. The plate heat exchanger has a small flow channel, the plates are wavy, and the cross-section changes are complex, which makes the flow direction and velocity of the fluid constantly change, which increases the disturbance of the fluid and has a high heat transfer coefficient.

Great adaptability. The required heat transfer area can be achieved by increasing or decreasing the plate. A heat exchanger can be divided into several units, which can be used for heating or cooling between several fluids at the same time.

Compact structure, small size and few consumables. The heat transfer area per cubic meter volume can reach 250m2, and the heat transfer surface per square meter only needs about 15kg of metal.

Dirt factor is small. Due to the large flow disturbance, dirt is not easily deposited. The plate heat exchanger plate is of good material and has little corrosion, which makes its fouling coefficient value smaller. Plate heat exchangers mainly use metal plates, so the price of raw materials is cheaper than the same metal pipes.

Disadvantages of plate heat exchangers
1) Poor sealing and easy to leak. The gasket needs to be replaced frequently, which is troublesome.
2) The use pressure is limited, and generally does not exceed 1MPa.
3) The use temperature is limited by the temperature resistance of the gasket material.

What Do The fFour-piece Quilt Comforter Sets Refer To?

The four-piece quilt comforter sets refers to the essentials for bed use when sleeping. It mainly includes two pillow cases, a quilt cover and a bed sheet. Most of the materials are pure cotton, and there are silk cotton and fiber. The four-piece set on the bed occupies an important position in home life. According to the differences of the four seasons, there are many differences in the types of fabrics of the four-piece set.

The fabric structure of four-piece sheets is generally divided into plain weave, twill weave, satin weave, and jacquard. Low-grade plain weave products have many intertwined points, firm texture, flat surface, the same appearance effect on the front and back, and good abrasion resistance and breathability. Twill fabric is a more common mid-range product, with longer floating lines and a soft feel. Tissue fabrics are denser and the product is thicker. Satin fabrics are mostly used in middle-to-high-grade bedding, with soft texture, smooth and shiny fabric.

What fabrics do the four-piece sheets have?
• Cotton fabric
Pure cotton fabric is considered as a comfortable fabric, and it is the most common four-piece fabric in the family.
Advantages: Absorbs water, sweat and sticks to the skin, and does not have any irritating properties to human skin. Cotton fabrics dominate the bedding. In the cold winter, cotton fabrics have better warmth, giving a soft and comfortable feel as a whole, and the price of cotton bedding is also moderate.
Disadvantages: The biggest disadvantage of cotton fabrics is that they will shrink after frequent cleaning.

• Linen fabric
Advantages: Linen sheets make it easier to fall asleep than cotton sheets, and they sleep soundly and deeply. Examination of the skin showed that the type of linen bedding had no irritation to the skin, reduced skin temperature and muscle tension, and the linen fabric also had the effect of inhibiting bacterial growth.
Disadvantages: The bedding of linen fabric feels rough, and it is generally used as a bed cover during the day, or as a nursing bed sheet on a mattress.

• Polyester fabric
Polyester fabric is a blended fiber, which is a blend of some natural fibers and chemical fibers. Both the comfort of natural fibers and the durability of chemical fibers.
Advantages: Low cost, good color fastness, bright colors, good shape retention, and more durable.
Disadvantages: Easy to pilling, easy to electrostatic, poor affinity.

• Brushed Fabric
The brushed fabric is a high-grade combed cotton. During the post-processing, the fabric is brushed to make the surface of the fabric have a certain velvet feel and improve the fabric feel.
Advantages: Sanding is also called sanding, which can make warp and weft yarns produce hairs at the same time, and the hairs are short and dense, the suede is flat, the hand feels full and soft, rich in suede, and the luster is soft without aurora.
Disadvantages: Because the brushed cotton products are made of cotton fibers and lack elasticity, cotton clothing will be easily deformed, and it is easy to stick to wool and difficult to remove completely. Not only that, the brushed fabric is also particularly afraid of acid. When the concentrated sulfuric acid contaminates the cotton, the cotton will be burned into holes.

• Bamboo Fiber Fabric
Bamboo fiber fabric belongs to a new type of fabric. It is made from natural moso bamboo as raw material and digested by hydrolysis.
Advantages: Because the cross section of the bamboo fiber is covered with oval gaps, it has good air permeability, and it is cool and comfortable for people to sleep on it. Bamboo fiber is a natural fiber that can produce negative ions and far infrared rays, which can promote blood circulation and metabolism.
Disadvantages: During the weaving process, due to the characteristics of easy absorption of bamboo fiber, large wet elongation and large plastic deformation, it is very easy to be brittle. 100% bamboo fiber in manufacturing has not solved the shrinkage problem well.

• Silk Fabric
Advantages: The most high-end fabric is silk fabric. Silk fabric has gorgeous appearance, richness, natural soft light and glittering effect, feels comfortable, high strength, better elasticity and moisture absorption than cotton, etc.
Disadvantages: Easy to soil, and less heat resistant to strong sunlight than cotton.

Still have to learn to maintain a variety of bedding in order to make them last longer.

WHY LOTION PUMPS CAN'T REBOUND AFTER PRESSING

First of all, it is necessary to check whether there is a problem with the lotion pumps spring. The effect of the spring on the piston cannot be ignored. If the spring is damaged, it will easily lead to the return stroke of the piston is not in place. slow.

Secondly, check whether the thickness of the lotion pumps piston fits the body. During the movement of the piston, any trace of the gap will cause weak suction, and the material will not be pressed by the head. Since plastics have the properties of thermal expansion and contraction, normal pistons are very important to ensure the quality of lotion pumps.
 
Finally, let's analyze the body. In view of the scalability of the plastic, if the operation is inappropriate during injection molding, insufficient injection will cut off a thin layer of the body, resulting in uneven inner walls, and the piston is inevitably left during the stamping process Gaps, resulting in failure to discharge.