Water heater for railway train

Abstract

The invention provides a water heater for a railway train. The water heater comprises a water boiling container, a water conveying pipeline, an electric heating element, a water flow control device, an emptying device and an electric control device; the water boiling container and the electric heating element form an instant heating type electric heating water pipe; the water flow control device is arranged on a water conveying pipe; the emptying device is arranged on the water conveying pipeline, is used for emptying water in the water boiling container and the water conveying pipeline when needed and comprises a tee joint, an emptying pipe and an emptying valve; a flame-retardant thermal insulation layer is arranged on the periphery of each of the water boiling container and the electricheating element; a fireproof and explosion-proof shell is arranged on the periphery of the flame-retardant thermal insulation layer; and the electric control device is used for controlling the on-offstates of a power supply of the electric heating element, the water flow control device and the electric emptying valve. According to the water heater, the structure is improved, so that the technical problems that in the prior art, the frost crack damage is easily caused at extremely low temperature, potential safety hazards exist due to insufficient consideration of the fire-proof and explosion-proof conditions, and the influence on a water heater is caused due to the fact that the situation that the boiling points of water is different when the train is driven into a high-altitude area isnot considered can be solved.

Description

technical field [0001] The invention relates to a water heater, in particular to a water heater for railway trains. Background technique [0002] Providing boiling (hot) water for train passengers and crew is an indispensable and important part of railway train operation. Electric water tanks or electric water heaters are generally used in railway trains for boiling water to provide boiled (hot) water. At present, electric water tanks or electric water heaters used in railway trains generally have three problems: First, because the regions and environments where trains operate often change greatly, the current railway department requires that the electric water heaters equipped on trains be in an environment of -40°C to 40°C It can be effectively applied in the temperature range, and it will not freeze within 12 hours at -40°C. However, due to the structural limitations of the electric water tank or electric water heater on the existing railway train, it is difficult to com...

AI Technical Summary

Problems solved by technology

At present, electric water tanks or electric water heaters used in railway trains generally have three problems: First, because the regions and environments where trains operate often change greatly, the current railway department requires that the electric water heaters equipped on trains be in an environment of -40°C to 40°C It can be effectively applied in the temperature range, and it will not freeze within 12 hours at -40°C. However, due to the structural limitations of the electric water tank or electric water heater on the existing railway train, it is difficult to completely empty the water stored in it. Under the extremely low temperature environment of about 40°C or even lower, the current electric water heaters are extremely prone to frost cracking and damage; second, the electric water tanks or electric water heaters on existing railway trains basically do not consider the altitude of the train when it is running. Height problems, such as when a train travels from a plain area to a plateau area, because the boiling point of water in the plain area is higher than that in the plateau area, the boiling point of the electric water tank or electric water heater on the existing railway train is usually designed according to the plain area, so when the train When driving to plateau areas, the water boils before reaching the set boiling point temperature, but the water heater continues to heat, so on the one hand, a large amount of steam will be generated, and on the other hand, the water heater may dry out, bringing safety hazards 3. Due to the special operating environment of railway trains, the impact of the fire and explosion-proof performance of electric water heaters on the safety of railway trains cannot be underestimated, and the electric water tanks or electric water heaters currently used by railway trains are not enough for fire and explosion protection. ,There are security risks

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