Basic introduction Chinese name: hand warmer mbth: hand warmer principle: physical and chemical principle type: automatic heating health care products function: automatic heating, introduction of physical therapy and health care, principle, use characteristics, classification, product specifications, self-control, water storage, cleaning, warm-keeping tips, product characteristics, instructions for use, early warning and introduction of hand warmers, which can be roughly divided into three types: one is heating by heating water, which is also commonly known as. Different from the traditional hot water bottle, the electric hot water bottle saves the trouble of adding water. They just plug in the power supply and wait 10 minutes to heat up. In fact, the water inside is boiling, so the temperature will be very high. One is to generate heat through chemical reaction, which is the type of hand warmers on the market. The temperature of heat generated by the contact of internal chemicals is about 40℃. The other is to use the function of lithium battery, the internal heating chip heats up, and the USB interface charges and discharges, similar to the mouse pad of hand warmer. Because of the function of lithium battery, it can also be used as a mobile power supply. Small size, easy to carry, the temperature can reach about 50℃. Principle Appearance: A sealed plastic bag with transparent liquid and a metal sheet inside. 1, use-gently bend the metal sheet in the bag, and the liquid in the bag will appear crystal (blue translucent), harden and become solid. The fever temperature is about 50 degrees (about 1 hour). 2. Standby —— After use, put it in boiling water for 10 minute until the crystal completely recovers to a transparent liquid, and then use it again after cooling. 3. The product can be reused according to the above method. In hot summer, you can change it into a cold-proof treasure, which can be used for heatstroke prevention and cooling like an ice pack, but it needs to be frozen in the freezer before use. To understand the principle of hand warmers, we must first know what a supersaturated solution is. At a certain temperature, the solubility of solute in solvent is constant, for example, the solubility of salt (sodium chloride) in water is 36g/ 100mL water at room temperature. When the concentration in a solution is equal to its solubility, this solution is called a saturated solution; When the solubility of a solution is higher than its solubility, it is called supersaturated solution. The liquid in the warm handbag is a supersaturated solution of sodium acetate. Because the concentration of supersaturated solution is too high, it is unstable. When a metal is twisted, a slight vibration is enough to crystallize the solute and turn it into a relatively stable solid. However, this process is exothermic, so the warm handbag begins to heat up. One advantage of warm handbags is that they can be recycled. As long as the warm handbag is heated in boiling water for about 10 minutes, the condensed solute will dissolve again; This is because when the temperature rises, the solubility of solute becomes larger. In the process of dissolution, the solute undergoes an endothermic reaction and becomes a supersaturated solution again. It is said that the packaging seems to be made of PVB, which is non-toxic at room temperature, but it will precipitate toxic substances after heating. This product has not been tested by the State Quality Supervision Bureau, so its safety needs to be considered. Features: 1. Lithium battery provides energy, large capacity and more environmental protection. It can be recycled, charged for 3-4 hours and kept at room temperature for 6-7 hours (the specific time depends on different models). 2. The latest ceramic heater is used inside, which is healthy, conducts heat through infrared rays, promotes blood circulation, accelerates metabolism, improves immunity, and has no electromagnetic radiation. It is an ideal product for relieving pain, protecting health and keeping warm in winter for patients with arthritis, scapulohumeral periarthritis, lumbocrural pain, rheumatism, rheumatoid arthritis, chills and discomfort, chills in limbs and cold pain in wounds. 3. Small and lovely appearance and elegant packaging are good gifts for friends, relatives and couples. 4. With USB reverse charging function, it can charge all kinds of digital products, which is suitable for home life, work and going out. Electric heating treasure classification Electric heating treasure products include electric baking pans and electric hot water bottles. According to the heating principle of electric hot water bottle, there are two types: electrode type and electric heating element type. 1. solid electric baking pan filled with thermal insulation cotton (such as; The working principle of asbestos, etc. Yes: adopt double temperature control electric energy storage structure to gradually release heat energy. Equipped with automatic overheating protection device and automatic heat preservation indication device, as well as a small electric furnace controlled by PTC thermistor switch. PTC is a thermistor with positive temperature coefficient, which will generate heat by itself when current passes through it (the heat of electric furnace will also be transferred to it). When the temperature reaches a certain value, its resistance will increase sharply, which can be regarded as disconnection, so Rebao stops consuming electric energy at this time. 2. Soft liquid electrothermal treasure uses new technology to store energy and heat up quickly. One-time water injection, permanent use, unique explosion-proof non-ironing device, temperature control protection; Long service life; Long-lasting heat preservation and the like. The working principle is improved on the basis of solid electric cake, adopting electrode heating mode, high quality temperature control and thermal fuse double temperature control insurance. Under normal circumstances, when the temperature of the liquid in the bag reaches 65 degrees, the thermostat will automatically cut off the circuit and stop heating; Once the thermostat control fails, the thermal fuse cuts off the power supply and stops heating, so it needs to be replaced with a new product. Please don't try to repair it. Product specifications: hot water bottle: plum blossom type: diameter 23CM, net weight: 1.0kg, hexagonal type: diameter 23CM, net weight: 1.0kg, pillow type: length 28.5CM* width 1.9cm, net weight:1. Heart shape: length 23.5CM* width 22.5CM Net weight: 1. 1kg tortoise shell shape 20mm Net weight: 60g Oval shape: 85*62*20mm Net weight: 60g Homemade 1 Put 175g sodium acetate (CH3COONa) in 50mL. 3. Pour the solution into a fresh-keeping bag and add the twisted metal electrothermal treasure. It is a new heating product which can store heat, with reasonable structural characteristics, convenient use and maintenance, large heat storage and long heat preservation time. It is an ideal product for warming hands and feet in winter. With the improvement of people's living standards, electric heating treasure has become a necessity for families. After all, it can be used for heating, physical therapy and hot compress. Because the iron shell was inconvenient to carry in the past, there was a water storage electric heating treasure. The material is soft or velvet, soft, does not contain any chemical heating agent, has no odor, and has higher thermal efficiency. There are many domestic production enterprises. In northern cities, electric heating treasure has become another necessary daily necessities besides mobile phones in cold weather. Cleaning 1, you can dip a little detergent in a wet towel and put it on the outer layer of hand warmers. After basic cleaning, wipe off the detergent attached to it with a clean wet towel, then wipe it with a dry towel and dry it. Avoid the power connection when wiping with a wet towel. Most hand warmers have a closed cover at the power interface. After covering, avoid this place, pick up the power connector, protect this piece with your palm, and then gently scrub other parts of the surface with laundry detergent dipped in water; If there is no cover, put it directly at the power interface by hand and ask someone to help clean it with a soft brush. Be careful not to use too much force or wet the power connector. 3. You can buy down jacket dry cleaning agent in the market and spray it on the cloth on the outer layer of hand warmers. After four or five minutes, clean it with a wet towel, then dry it with a dry towel and dry it in the shade. 4. Cover the power interface with paper or cloth first, then spray the foam cleaner evenly on the outer layer of the hand warmer and wipe it with a dry towel. This cleaning effect is very good. Warm reminder, this product adopts double temperature control, which is more efficient and safe. The plug adopts 3C certified patent plug, with automatic early warning power-off device, so that you can avoid worries and use computer to automatically layering, which can prevent leakage more effectively! Product function: 1. It is made of high-grade plastic cloth by special heat sealing process. It uses an efficient heater to uniformly heat the liquid semiconductor with a special formula in the bag, and efficiently keeps the temperature, so that the outer fabric feels comfortable. 2. Full-automatic temperature control and high-temperature protection to ensure full performance, unique vacuum liquid injection processing technology, automatic power off when the charging temperature reaches 65-75 degrees, safe and reliable; 3. Unique hyperthermia function, which can warm hands, feet and quilts, and can be used to relieve the pain caused by toothache and arthritis and the pain and fatigue of neck, waist and shoulder caused by overwork; Hand warmers 4. Beautiful appearance, fast charging, suitable for home life, work and going out to carry, high-efficiency heating agent is used inside, and the temperature can be kept for a long time at high temperature, and the set temperature can be reached after charging for 8- 18 minutes, and the temperature can be kept for 2- 10 hour; 5. The special liquid injection process is one-time processing and permanent use, which is safe and convenient; Instructions for use 1. When the power supply is turned on, the indicator lights up, the warm bag starts to work, and the light goes out when the temperature reaches the set value; It can also be charged according to the temperature required by the individual; 2. Please disconnect the power supply after charging. Do not connect the electric heating bag to the power cord for a long time, and unplug the power cord from the power socket. 3. Please wait while charging to avoid accidents due to long charging time. Early warning, consumption early warning and hand warmers bring great convenience to people, but electrode hand warmers may have huge security risks.