How to buy an electric water heater

According to the different internal structure, electric water heaters are divided into three types: water tank type, open type open and closed type. Among them, the water tank type has no liner, poor insulation performance, and the water output is also small; the open open type is continuously supplied hot water by the tap water pressure, the water temperature can be arbitrarily adjusted, and the water discharge is powerful, but the inner liner is low in pressure and is only used for shower; Export sealed water heaters not only can shower, but also connect the bathtub, access to the kitchen, easy to use.

Determine the appropriate capacity

When determining the capacity of a water heater, factors such as the status of the family population and the amount of hot water are mainly taken into consideration. General rated capacity of 30 ~ 40 liters of electric water heaters, suitable for 2 to 3 consecutive shower use; 40 ~ 50 liters of electric water heater suitable for 3 to 4 consecutive shower use; 70 ~ 90 liters for 4 to 5 people using continuous shower.

Pay attention to the performance of safety devices

As electric water heaters are closely related to personal safety, the choice of electric water heaters must focus on safety performance. Electric water heaters should generally have a grounding protection, anti-dry, anti-overheating, anti-overpressure devices, high-end leakage protection and water-free automatic disconnection and power indication function.

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Microscope Slides

The East-West glass slide is a glass slide or quartz slide that is used to place a glass slide or quartz slide when it is observed under a microscope. During production, a cell or a sample containing a certain tissue is randomly placed on the slide glass, and a cover slip is placed on it for observation a similar material that produces a phase difference.

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