The solar water heater is a typical "three-point product, seven-point installation". Consumers just buy the product home and cannot use it. Professionals need to install it according to the site conditions before they can be used normally.
Consumers must not underestimate the installation of solar water heaters. In many solar water heater consumption disputes, many are caused by inadequate installation or failure. A citizen of Dalian City purchased a wall-mounted solar water heater. Although the merchant promised “safety†during the installation, there was still a problem after one year. The fixed solar panel has an expansion screw drilled from the wall, and the solar panel sways and swayed. At that time, the company that promised to "guarantee safety" did not even find out the reason for "falling solar panels".
In the spring windy season, it is often seen that the wind blows down the news of solar energy, which is caused by installation problems. Since solar water heaters are installed on the roof, in urban high-rise residential buildings, solar panels are installed on the outer wall of the balcony. If the installation is not guaranteed, the solar energy becomes a “time bomb†suspended at high altitude.
Lack of installation specifications
At present, there is no corresponding technical standard and installation specification for the installation of solar water heaters in the country, and there is no relevant business organization to guide and manage. Although some cities have introduced some installation specifications, they only work for the installation of batches in the community. The installation of a single solar "storage" purchased by consumers does not work, resulting in a safety hazard in the installation and use of solar water heaters.
In the solar water heaters that have problems in windy days, the phenomenon of “weak winds†is largely due to the lack of installation. For example, the number of cement used for water heaters should be fixed by screws on the bracket of the water heater and the base. In the installation of some solar-powered water heaters in rural areas, some installers simply “put†them on the roof, and they are finished with a thin wire. If it encounters bad weather, how much a thin wire can play is worrying.
A citizen of Dalian had a problem with the installation of solar water heaters, causing the internal and external wires of the water heater to break, which caused the water heater to leak. The newly purchased sofas and furniture were soaked, and the neighbors also suffered, causing 60,000. Multiple direct losses. According to the survey, the cause of the accident was that the installer found a missing part when installing the water heater and purchased a similar product at random.
In order to save costs, many companies have started an article on the bracket. According to the industry's recommended standards, the support plate should be at least 1.5 mm thick and 100 mm wide. Some solar water heater manufacturers have cut corners. The support material is only 1-1.2 mm thick and 60-70 mm wide, narrow and thin. There are some bracket plates with multiple borings. Such brackets obviously have a great resistance to torsion and wind resistance.
Professionals say that the installation of solar water heaters is still inside the industry. First, the installation units are not standardized. In addition, some wall-mounted solar water heaters installed outside the residential balcony, if the quality is not good or the installation is not standardized, there will be danger of falling off. It poses a threat to the safety of pedestrians passing by. Looking at the news, there is indeed a case in which solar energy falls into the pedestrians and causes death. The safety of solar installation cannot be ignored.
Installation problems and manufacturers and businesses "kick the ball"
The characteristics of the solar water heater industry are that retail terminals have the most profit. Since the sales of solar water heater products are mainly driven by terminals, “investment is king†is the characteristics of the whole industry. Therefore, although the profit of this product is as high as 50%, only 5% of the manufacturers, 15% of the prefecture-level dealers, and 30% of the township retailers. Under normal circumstances, the installation of solar water heaters is also carried out by retailers, but when there is a problem with the product, such as disputes caused by improper installation, retailers and manufacturers often kick each other.
A rice cooker or rice steamer is an automated kitchen appliance designed to boil or steam rice. It consists of a heat source, a cooking bowl, and a thermostat. The thermostat measures the temperature of the cooking bowl and controls the heat. Complex rice cookers may have many more sensors and other components, and may be multipurpose. Cooking rice has traditionally required constant attention to ensure the rice was cooked properly, and not burnt. Electric rice cookers automate the process by mechanically or electronically controlling heat and timing, thus freeing up a heating element on the cooking range that had to be otherwise occupied for rice cooking. Although the rice cooker does not necessarily speed up the cooking process, with an electric rice cooker the cook's involvement in cooking rice is reduced to simply measuring the rice, preparing the rice properly and using the correct amount of water. Once the rice cooker is set to cook, the rice will be cooked with no further attention.
Features:
For modern home rice cookers, the smallest single-person model cooks 1 rice cup (180 ml), whereas large models can cook 10 cups. Commercial models can cook 20 or more cups. As a possible source of confusion, model specifications and names may list either cooked or uncooked capacity. Rice roughly doubles in size during cooking; therefore, a 10 cup (uncooked) rice cooker can produce up to 20 cups of cooked rice. The prices vary greatly, depending on the capacity, features, materials used, and the country of origin.
The majority of modern electric rice cookers are equipped with a stay-warm or keep-warm feature, which keeps the rice at an optimal temperature for serving without over-cooking it. Some gas cookers also have electric stay-warm mechanism. However, the usefulness of this feature degrades over time, a microwave may be more energy efficient or better suited to reheat rice that will sit longer than four hours.
Some rice cookers use induction heating, with one or more induction heaters directly warming the pot. This can improve energy efficiency.
Most modern rice cookers use aluminium for the inner cooking bowl. There are some models that use stainless steel instead of aluminium. Various other materials, such as copper, pure carbon, ceramic, and diamond powder coating, may be used for higher heat conductivity or better taste.
The pressure-cooking models can raise the water's boiling point higher, e.g., from 100 °C at 1.0 atm up to about 110 °C at 1.4 atm, which speeds cooking. The pressure-cooking models can also be used in high altitude areas, where the boiling temperature is below 100 Celsius. Pressure cookers are also suitable for cooking brown rice (which contains oils and bran fiber that cook differently from pure white rice starch). Some pressure rice cookers have a varying pressure control mechanism (named the "dual-pressure" method) that creates repeated pressure/release cycles during the cooking.
There also exist mechanisms to collect and return the boiled over liquid to the inner rice bowl.
Many cookers now have microprocessor-controlled cooking cycles, which are often used to adjust for rice and cooking type.
Applications
Rice cookers are typically used for the preparation of plain or lightly seasoned rice. Each rice cooker model may be optimized to cook a certain type of rice best. For example, most Japanese rice cookers are optimized for cooking Japanese rice and may not be the best for other types of rice[citation needed], although cooking time can be lengthened simply by more water.
The typical method of cooking long grain rice is boil-and-strain and/or steaming method. The absorption method used in Japanese rice cookers will produce slightly different texture and taste, usually stickier rice.
Brown rice generally needs longer cooking times than white rice, unless it is broken or flourblasted (which perforates the bran).
Different varieties of rice need different cooking times, depending on their grain size, grain shape, and grain composition. There are three main types of Asian rice: Oryza sativa subsp. indica, i.e., Indian rice (long grain rice, e.g., basmati rice and Thai jasmine rice), O. sativa subsp. javanica, i.e., Java rice (large grain rice) and O. sativa subsp. japonica, i.e., Japanese rice (medium grain rice, e.g., Calrose rice, short grain rice, e.g., most Japanese rice and risotto rice).
African rice, Oryza glaberrima, is an entirely separate species, but can be cooked in the same way. Zizania is not even in the same genus, although it is often called a rice (or "water oats"); it, too, can also be cooked in a rice cooker.
A rice cooker can be used to cook many boiled or steamed granular foods, such as pot barley, bulgar wheat, and dal. Provided the ingredients have similar cooking times, a rice cooker can cook mixtures such as khichdi. Some rice cookers can be used as automated couscoussiers, cooking couscous and a stew simultaneously.
Rice Cooker
Rice Cooker,Drum Rice Cooker,Deluxe Rice Cooker,Straight Rice Cooker
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