CN203258869U - Water-saving system of domestic water heater - Google Patents

Abstract

A water-saving system of a domestic water heater comprises the water heater and a water heating tank, the water heating tank is arranged in the water heater, the water heater is connected with a hot water pipe which supplies hot water, the hot water pipe is connected with a tap, water flows out from the tap, a water temperature setting device is arranged on the water heater, and the water temperature can be set manually through the water temperature setting device. The water temperature setting device comprises a third temperature sensor and a central control device, the third temperature sensor is arranged on the hot water outlet of the heater, a two-position three-way valve is connected between the hot water pipe and the tap, a second temperature sensor is connected to the water inlet of the two-position three-way valve, and the two-position three-way valve is provided with one inlet and two outlets. According to the water-saving system of the domestic water heater, the water temperature when the tap is turned on is compared with the preset temperature of the water heater through the two-position three-way valve, the low-temperature water is sent back to the water heater and reheated through the two-position three-way valve if the temperature of the water flowing out from the tap is lower than the preset temperature, the channel between the hot water pipe and the tap is communicated after the temperature of the water flowing out from the tap meets requirements, and hot water is supplied normally.

Description

Household Water Heater Water Saving System

technical field

The invention relates to the field of domestic hot water equipment, in particular to a domestic water heater. the

Background technique

In current households, people often use water heaters to wash their hands, hair, or take a bath. However, since the water heater is still a certain distance from the faucet, some houses are designed so that the water heater is more than ten meters away from the shower head, and the water between the water heater and the faucet There will be a lot of cold water stored in the pipe. Before the hot water flows out, the cold water must be discharged through the tap, which causes unnecessary waste. Since the water heater is used frequently, such waste is often accumulated, and the accumulated waste is even greater. There are tens of millions of users across the country, and the waste is even more astonishing. It also virtually increases the cost of using water heaters and increases household expenses. the

Contents of the invention

The object of the present invention is to provide a water-saving system for a domestic water heater, which can avoid the waste of water resources caused by the low water temperature when the hot water is just turned on. the

Technical scheme of the present invention is:

The water-saving system for household water heaters includes a water heater and a heating water tank located in the water heater. The water heater is connected with a hot water pipe for hot water outlet, and the hot water pipe is connected with a faucet for water outlet. Water temperature setting device, the water temperature setting device includes a third temperature sensor located at the hot water outlet of the water heater, and also includes a central control device, a two-position three-way valve is connected between the hot water pipe and the faucet, and the two-position three-way The water inlet of the through valve is connected with a second temperature sensor, and the two-position three-way valve is provided with an inlet and two outlets, one of which is connected to the faucet, and the other outlet is connected to one end of the return pipe, and the other end of the return pipe is It is connected to the heating water tank of the water heater, and the second and third temperature sensors and the two-position three-way valve are all connected to the central control device. The two-position three-way valve has two working positions when it works, and leads the channel of the hot water pipe and the faucet Or lead the channel between the hot water pipe and the return pipe.

The water inlet of the faucet is connected with a first temperature sensor, and the first, second, and third temperature sensors and the two-position three-way valve are all connected to the central control device for control,

A filter is provided at the outlet where the two-position three-way valve is connected with the return pipe.

A filter is arranged between the second temperature sensor and the water inlet of the two-position three-way valve. the

The two-position three-way valve is a two-position three-way solenoid valve. the

The present invention compares the water temperature when the faucet is initially opened with the preset temperature of the water heater through the two-position three-way valve, and if the water temperature at the faucet is low, sends the lower-temperature water back to the water heater for reheating through the two-position three-way valve. After the water temperature at the faucet meets the requirements, connect the channel from the hot water pipe to the faucet to supply hot water normally. The invention solves the waste problem that occurs when the water temperature is too low when the existing water heater starts to be turned on, especially for the use of cold water in the pipe when the water heater is far away from the faucet, which is convenient for people to use suitable hot water without waste, and is suitable for the kitchen , toilet and bathing are very useful to meet the society's requirements for energy conservation and environmental protection. the

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention. the

Detailed ways

As shown in Figure 1, the present invention is a water-saving system for domestic water heaters, including a water heater 1 and a heating water tank 2 located in the water heater 1, an angle valve and a hot water pipe 3 for hot water outlet are connected to the lower side of the water heater 1, and the hot water pipe The water outlet of 3 is connected with the faucet 4 of water outlet. The faucet 4 can be a water faucet in the kitchen or a bathroom, or a water outlet device such as a shower used when showering and bathing. the

The water heater 1 is provided with a water temperature setting device for manually setting the temperature. The water temperature setting device includes a third temperature sensor 8 located at the hot water outlet of the water heater. The water temperature setting device and the third temperature sensor 8 are automatic water heaters. The belt belongs to the prior art. the

The invention also includes a central control device. A two-position three-way valve 5 is connected between the hot water pipe 3 and the water tap 4, and the two-position three-way valve 5 is a two-position three-way solenoid valve. The water inlet of the faucet 4 is connected with a first temperature sensor 6 , and the first temperature sensor 6 is located between the faucet 4 and the two-position three-way valve 5 . The water inlet of the two-position three-way valve 5 is connected with a second temperature sensor 7 . The two-position three-way valve 5 has an inlet P and two outlets A, B, wherein one outlet A is connected to the faucet 4, and the other outlet B is connected to one end of the return pipe 9, and the other end of the return pipe 9 is connected to the heating water tank of the water heater 2 connections, the first, second, third temperature sensors 6, 7, 8 and the two-position three-way valve 5 are all connected to the central control device, and the central control device collects data from the first, second, third temperature sensors 6, The temperature values of 7 and 8 are compared, and then a control signal is sent to the two-position three-way valve 5 to make the two-position three-way valve 5 act and lead to different channels. The channel between the hot water pipe 3 and the faucet 4 can be connected, or the channel between the hot water pipe 3 and the return pipe 9 can be connected. the

A filter 10 is provided at the outlet where the two-position three-way valve 5 is connected to the return pipe 9 . A filter 10 is provided between the second temperature sensor 7 and the water inlet of the two-position three-way valve 5 . Filters are set at these two places to prevent the two-position three-way valve 5 from being blocked by the scale generated by the water heater 1. After using for a period of time, it should be cleaned up in time. the

Finally, it should be noted that the water temperature in a certain season does not change much. The time when the water flows to the faucet when the faucet is first turned on, and the approximate time when the hot water can reach the preset temperature can be controlled by the user himself in the center based on experience. The device presets the approximate time for the two-position three-way valve 5 to conduct its channel with the return pipe 9, and at the same time presets the time for delaying the opening of the two-position three-way valve 5 to the channel of the faucet 4. Such approximate changes also fall into place. Within the protection scope of the present invention. the

Claims (5)

1. Household water heater water-saving system, including a water heater and a heating water tank located in the water heater, the water heater is connected with a hot water pipe for hot water, and the hot water pipe is connected with a faucet for water outlet, and the water heater is provided with a manual setting A water temperature setting device for temperature, the water temperature setting device includes a third temperature sensor located at the hot water outlet of the water heater, and is characterized in that it also includes a central control device, and a two-position three-way valve is connected between the hot water pipe and the faucet , the water inlet of the two-position three-way valve is connected with a second temperature sensor, and the two-position three-way valve is provided with one inlet and two outlets, one of which is connected to the faucet, and the other outlet is connected to one end of the return pipe , the other end of the return pipe is connected to the heating water tank of the water heater, and the second and third temperature sensors and the two-position three-way valve are all connected to the central control device. The passage between the water pipe and the faucet or the passage between the hot water pipe and the return pipe. 2. The water-saving system for household water heaters according to claim 1, characterized in that: the water inlet of the faucet is connected with a first temperature sensor, and the first temperature sensor is connected to the central control device for control. 3. The water-saving system for household water heaters according to claim 1, wherein a filter is provided at the outlet where the two-position three-way valve is connected to the return pipe. 4. The water-saving system for domestic water heaters according to claim 1 or 2, characterized in that a filter is provided between the second temperature sensor and the water inlet of the two-position three-way valve. 5. The water-saving system for household water heaters according to claim 1 or 2, wherein the two-position three-way valve is a two-position three-way solenoid valve.

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