CN201983420U - Instant heating type electric water heater of central hot water circulation system - Google Patents

Abstract

The utility model relates to an instant heating type electric water heater of a central hot water circulation system, which comprises a casing, a heating body, a water inlet pipe of cold water, a water outlet pipe of hot water, 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 instant heating type electric water heater of the central hot water circulation system also comprises a circulation pump, a one-way valve and a water return interface; the circulation pump is connected between the water inlet pipe of the cold water and the water inlet interface, and the water return interface is communicated with the water inlet pipe of the cold water by the one-way valve; and the water return interface, the one-way valve, the circulation pump, the heating body, the water outlet pipe of the hot water and a water return pipe form a closed circulating water passage. When the hot water needs to be used, a device using the water only needs to be opened and is immediately closed after 3 seconds, the circulation pump is started, and the water in the closed circulating water passage is heated by the heating body. If the hot water is not used, the water flow switch can be switched off, and the heating body stops heating; and if the hot water is used, the water flow switch can not be switched off, the cold water can be continuously heated, and the continuous supply of the hot water is ensured.

Description

The hot water cyclesystem instant electric water heater of central authorities

Technical field

The utility model relates to a kind of instant electric water heater, especially a kind of instant electric water heater with central hot water cyclesystem.

Background technology

Present prior art, water heater all are that cold water directly uses by water heater heating back, in this case, when using hot water, just can slowly have heated hot water to flow out after will bleeding off the cold water in the whole pipe, and in bleeding off the process of cold water, water heater also is to continue in heating.When especially multi-channel long supplied water, the cold water that bleeds off and the electric energy of consumption were just more, caused the waste of a large amount of power and water energy.

Summary of the invention

The purpose of this utility model is: a kind of central hot water cyclesystem instant electric water heater is provided, and it not only has the water saving characteristics, and the hot water effluent is fast.It had both comprised the circulating hot water heating system, comprised cold water instant heating heating system again.Purpose is to be implemented in the cold water in the circulation water back in the process of using water heater, need not bleed off the cold water in the pipeline, reaches using water wisely and electric energy, is user-friendly to, and saves user time.

The utility model is achieved in that a kind of 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; Its special character is: 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.

A kind of central hot water cyclesystem instant electric water heater of the utility model, owing to adopt such structure, in use, the closed circulation water route is provided with several water consumption devices, as tap, gondola water faucet.When needs use hot water, as long as there is any one water consumption device to open, to close immediately after 3 seconds, circulating pump starts, the water in the calandria heating closed circulation water route; When water temperature was heated to design temperature, circulating pump quit work.If do not use hot water this moment on any one water consumption device, water flow switch will disconnect, and calandria stops heating; If there is any one water consumption device using hot water, water flow switch just can not disconnect, and can continue to heat cold water, guarantees the lasting supply of hot water.Overcome in the prior art, need bleed off cold water, the calandria heating, heat time heating time is long, the defective of waste power and water.

Description of drawings

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

Fig. 2 is the schematic diagram of the utility model user mode.

The specific embodiment

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

As shown in Figure 1, a kind of central hot water cyclesystem instant electric water heater comprises shell 1, calandria 2, cold water inlet 3, hot water outlet pipe 4, water flow switch 5 and control device, and calandria 2 has into water interface and water outlet interface; Water flow switch 5 is arranged in the calandria water inlet interface; Also comprise a circulating pump 6, a check valve 7 and a backwater interface 8;

Described circulating pump 6 is connected between cold water inlet 3 and the calandria water inlet interface, and backwater interface 8 is communicated with cold water inlet 3 by check valve 7;

Backwater interface 8, check valve 7, circulating pump 6, calandria 2, hot water outlet pipe 4 and return pipe 9 constitute the closed circulation water route.

As shown in Figure 2, the utility model in use: in use, hot water outlet pipe 4 and backwater interface 8 is communicated with by return pipe 9,

When needs use hot water, open hot water valve at any one water consumption device 10, close for 3 seconds immediately, and this moment, water flow switch was connected, circulating pump work, calandria 2 work, when heating-up temperature reached design temperature, circulating pump quit work.If do not use hot water this moment on any one water consumption device 10, water flow switch 5 will disconnect, and calandria stops heating; If there is any one water consumption device 10 using hot water, water flow switch 5 just can not disconnect, and can continue to heat cold water, guarantees the lasting supply of hot water.

Open any one water consumption device 10 instant-heating and outlet hot this moment, hot water just arranged after need not bleeding off the cold water in the pipeline.The water-saving and electricity-saving effect 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.

Images