CN201983420U - Instant electric water heater with central hot water circulation system - Google Patents

Abstract

An instant electric water heater of a central hot water circulating system comprises a shell, a heating body, a cold water inlet pipe, a hot water outlet pipe, a water flow switch and a control device, wherein the heating body is provided with a water inlet interface and a water outlet interface; the water flow switch is arranged in the water inlet interface; the water pump also comprises a circulating pump, a one-way valve and a water return interface; the circulating pump is connected between the cold water inlet pipe and the water inlet interface, and the water return interface is communicated with the cold water inlet pipe through a one-way valve; the water return interface, the one-way valve, the circulating pump, the heating body, the hot water outlet pipe and the water return pipe form a closed circulating water path. When hot water is needed, the water heater is opened, the water heater is closed immediately after 3 seconds, the circulating pump is started, and the heating body heats water in the closed circulating water path. If hot water is not used, the water flow switch is disconnected, and the heating body stops heating; if hot water is used, the water flow switch is not switched off, cold water can be continuously heated, and continuous supply of hot water is ensured.

Description

Instant electric water heater with central hot water circulation system

technical field

The utility model relates to an instant electric water heater, in particular to an instant electric water heater with a central hot water circulation system.

Background technique

In the current prior art, the water heater is used directly after the cold water is heated by the water heater. In this case, when hot water is to be used, the cold water in the entire pipeline must be drained before the heated hot water flows out slowly. And in the process of letting go of the cold water, the water heater is also continuously heating. Especially in the case of multi-channel remote water supply, more cold water is discharged and electric energy is consumed, resulting in a large amount of waste of water and electric energy.

Contents of the invention

The purpose of the utility model is to provide an instant electric water heater with a central hot water circulation system, which not only has the feature of saving water, but also produces hot water quickly. It includes both a circulating hot water heating system and a cold water instant heating system. The purpose is to realize the circulation heating of the cold water in the pipeline during the use of the water heater without letting go of the cold water in the pipeline, so as to save water and electric energy, facilitate the use of the user, and save the time of the user.

The utility model is achieved in the following way: a central hot water circulation system that is a thermal electric water heater, including a shell, a heating body, a cold water inlet pipe, a hot water outlet pipe, a water flow switch and a control device, and the heating body has a water inlet interface and a water outlet interface; the water flow switch is set in the water inlet interface; its special feature is that it also includes a circulation pump, a one-way valve and a return water interface;

The circulating pump is connected between the cold water inlet pipe and the water inlet port, and the return water port is connected with the cold water inlet pipe through a one-way valve;

The water return interface, the one-way valve, the circulating pump, the heating body, the hot water outlet pipe and the return pipe form a closed circulating water circuit.

The utility model relates to a central hot water circulation system, that is, a thermal electric water heater. Due to the adoption of such a structure, when in use, several water appliances, such as faucets and showers, are arranged on the closed circulation waterway. When hot water needs to be used, as long as any water heater is turned on, it will be turned off immediately after 3 seconds, the circulation pump will start, and the heating body will heat the water in the closed circulation water circuit; when the water temperature reaches the set temperature, the circulation pump will stop working. At this time, if no hot water is used on any water heater, the water flow switch will be disconnected, and the heating body will stop heating; if any water heater is using hot water, the water flow switch will not be disconnected, and the cold water will continue to be heated. Ensure continuous supply of hot water. It overcomes the defects in the prior art that cold water needs to be drained, the heating body is heated, the heating time is long, and water and electricity are wasted.

Description of drawings

Fig. 1 is the front view of the utility model.

Fig. 2 is a schematic diagram of the usage state of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, a central hot water circulation system instant electric water heater includes a shell 1, a heating body 2, a cold water inlet pipe 3, a hot water outlet pipe 4, a water flow switch 5 and a control device. The heating body 2 has an inlet Water interface and water outlet interface; the water flow switch 5 is set in the water inlet interface of the heating body; it also includes a circulation pump 6, a one-way valve 7 and a return water interface 8;

The circulating pump 6 is connected between the cold water inlet pipe 3 and the water inlet interface of the heating body, and the return water interface 8 is communicated with the cold water inlet pipe 3 through the one-way valve 7;

The water return interface 8, the one-way valve 7, the circulation pump 6, the heating body 2, the hot water outlet pipe 4 and the water return pipe 9 form a closed circulation waterway.

As shown in Figure 2, when the utility model is in use: when in use, the hot water outlet pipe 4 and the return water interface 8 are communicated through the return pipe 9,

When hot water needs to be used, open the hot water valve in any water heater 10 and close it immediately in 3 seconds. At this time, the water flow switch is turned on, the circulation pump works, and the heating body 2 works. Pump stopped working. If not using hot water on any water heater 10 this moment, water flow switch 5 will disconnect, and heating body stops heating; If any water heater 10 is using hot water, water flow switch 5 just can not disconnect, can Continuous heating of cold water ensures continuous supply of hot water.

Now open any water heater 10 and promptly go out hot water, just have hot water after needing to bleed off the cold water in the pipeline. The effect of saving water and electricity is obvious.

Claims (1)

1. a central hot water cyclesystem instant electric water heater comprises shell, calandria, cold water inlet, hot water outlet pipe, water flow switch and control device, and calandria has into water interface and water outlet interface; Water flow switch is arranged on in the water interface; It is characterized in that: also comprise a circulating pump, a check valve and a backwater interface;

Described circulating pump is connected between cold water inlet and the water inlet interface, and the backwater interface is communicated with cold water inlet by check valve;

Backwater interface, check valve, circulating pump, calandria, hot water outlet pipe and return pipe constitute the closed circulation water route.

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