CN201438040U - EMU water heater - Google Patents

Abstract

The utility model relates to a water heater for an EMU, comprising a shell, a water storage liner arranged in the shell, and an electric heating tube is arranged in the water storage liner; the bottom of the water storage liner is connected to a drain pipe, and the upper part is connected to a heat sink A water pipe, the lower part of which communicates with a cold water pipe, the cold water pipe communicates with a water inlet pipe, the water inlet pipe is provided with a pressure reducing valve, and the hot water pipe communicates with the drain pipe through an expansion water outlet pipe, and the expansion water pipe The outlet pipe is provided with a pressure limiting valve. The utility model has high water pressure resistance and quick hot water output.

Description

EMU water heater

technical field

The utility model relates to the technical field of water heaters, in particular to a water heater for train sets.

Background technique

The existing water heater for railway passenger cars has low water pressure resistance, slow hot water output and high power. The inner container of the existing water heater is a box-shaped structure, the pressure resistance is not good, and there is no decompression measure inside. Existing water heater adopts overheating heating method, which is controlled by flow switch. It does not heat when there is no flow, and only heats when there is flow. Since the electric heating tube has a heating process, when the faucet is turned on, the water flowing out will gradually heat up. Therefore, the hot water is slow. At the same time, the overheating heating method cannot heat and store hot water in advance, so it must have a large power to meet the use requirements.

Utility model content

The purpose of the utility model is to provide a water heater for train units with high water pressure resistance and fast hot water removal.

The technical scheme that realizes the above-mentioned purpose of the invention is as follows:

The EMU water heater includes a casing, a water storage liner arranged in the casing, and an electric heating tube is arranged in the water storage liner; the bottom of the water storage liner is connected to a drain pipe, the upper part is connected to a hot water pipe, and the lower part is connected to cold water The cold water pipe is connected to a water inlet pipe, the water inlet pipe is provided with a pressure reducing valve, the hot water pipe and the drain pipe are connected through an expansion water outlet pipe, and the expansion water removal pipe is provided with a pressure limiting valve.

The water storage liner is a cylindrical stainless steel liner.

The utility model can meet the pressure fluctuation range of 0.1-0.6Mpa of the water inlet pressure by adding a pressure reducing valve, and can make the water outlet pressure basically not affected by the water inlet pressure. The water heater is designed as a water storage heating method, which can use the idle time to heat the cold water to the set temperature and keep it warm, and can immediately produce hot water when in use. At the same time, the heating power of the water heater can be significantly reduced, which is about 30% of that of the existing water heater.

Description of drawings

Fig. 1 is the structural representation of the utility model

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in Figure 1, the EMU water heater includes a casing, a water storage liner arranged in the casing, and an electric heating tube is arranged in the water storage liner; the bottom of the water storage liner is connected to a drain pipe, and the upper part is connected to a heat sink. A water pipe, the lower part of which communicates with a cold water pipe, the cold water pipe communicates with a water inlet pipe, the water inlet pipe is provided with a pressure reducing valve, the hot water pipe and the drain pipe are connected through an expansion water outlet pipe, and the expansion water The outlet pipe is provided with a pressure limiting valve. The hot water pipe of the utility model is used for producing hot water, and at the same time, the heated and expanded water is discharged to the drain pipe through the expansion water outlet pipe. The cold water pipe stores water in the water storage liner through the water inlet pipe on the one hand, and directly provides cold water to the outside on the other hand.

The water storage liner is a cylindrical stainless steel liner. It has the characteristics of high pressure resistance and light weight.

The accompanying drawings and explanations of the utility model focus on the improvement part. Other structures in the prior art and other configurations that the water heater should have are not given, but it does not mean that the utility model has no relevant structures or configurations. It is only for clearly highlighting the improved technical solution of the utility model.

Claims (2)

1. the EMUs water heater is characterized by: comprise shell, be located at the water storage liner in the shell, be provided with electrothermal tube in the water storage liner; The bottom of described water storage liner is communicated with a drainpipe, top is communicated with hot-water line, the bottom is communicated with cold water pipe, described cold water pipe is communicated with a water inlet pipe, described water inlet pipe is provided with pressure-reducing valve, be communicated with by a swelling water outlet pipe between described hot-water line and the drainpipe, described swelling water outlet pipe is provided with pressure limiting valve.

2. EMUs water heater according to claim 1 is characterized by: described water storage liner is the cylindrical shape stainless steel inner container.

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