CN205227860U - Water -saving system for solar water heater - Google Patents

Abstract

The utility model discloses a water-saving system for a solar water heater, which comprises a water heater, a water storage tank, a controller, a first water mixing valve, a second water mixing valve and a third water mixing valve. 1. The second water mixing valve is connected to the first water mixing valve, the other two water ports of the second water mixing valve are respectively connected to the water inlet of the water storage tank and the shower, and the other two water ports of the first water mixing valve are respectively It is connected with the cold water pipe and the water outlet of the water storage tank, and a first solenoid valve and a second solenoid valve are respectively provided between the second water mixing valve, the shower and the water storage tank, and the first solenoid valve and the second solenoid valve respectively connected to the controller. In this water-saving system, a temperature-controlled single-chip microcomputer is connected with solenoid valves at two nozzles to control the water in the water pipe of the water heater in different flow paths.

Description

A solar water heater water saving system

technical field

The utility model relates to a water-saving system for a solar water heater.

Background technique

Water heaters are an indispensable household device in our daily life. There are three types of water heaters popular in the market, namely solar water heaters, electric water heaters and gas water heaters. At present, energy conservation and environmental protection have become the brightest selling point of various home appliances. Solar water heaters that fully utilize natural light energy play an absolute leading role in the drama of environmental protection and energy conservation. Calculated according to the amount of heat required to heat water to 35°C, the cost per ton of hot water for electric and gas water heaters is more than 30 yuan, while that for solar energy is only 10 yuan. A family that uses a solar water heater saves a year and can buy another water heater. These data give us reason to believe that popularizing solar water heaters is imperative.

However, during the use of solar water heaters, it was found that compared with the other two types of water heaters, solar water heaters have some inconveniences and disadvantages. In terms of heating speed, most of the gas water heaters currently produced are instant water heaters that can be used as soon as they are needed. The electric water heater needs to be powered on for about half an hour in advance before it can be used. It is better to use solar water heaters when the weather is fine, and the ideal floor is on the sixth to eighth floors; in terms of temperature stability, gas water heaters are heated quickly and have temperature adjustment devices, as long as they are adjusted to a comfortable temperature for the human body at the beginning of use. temperature, and then it will maintain a constant supply of hot water at this temperature. Solar water heaters are not very convenient to use for the time being. They need to be filled with water, and there is no guarantee that there will be hot water all the time.

When using the water heater, due to the distance from the water heater, there is no hot water in this section of the water pipe. The water stored in this section of the water pipe must be drained before the hot water will flow out. Some people think that the water in the short hot water pipe is drained. The discharge is negligible, but according to measurements, if the distance between the water heater and the nozzle is 5 meters, 3 to 4 liters of invalid hot water will be drained every time you take a bath in summer, and the situation is even more serious in winter, where 7 to 8 liters of hot water will be wasted. water. Especially the lower the living floor, the larger the resident from the height of the roof, the more water wasted. According to estimates by professional energy evaluators, at least 1 million tons of ineffective hot water are wasted in household water every year across the country, which is equivalent to the annual water output of five medium-sized waterworks. With the increase of users who use water heaters, the phenomenon of wasting water will become more and more serious.

Most of the existing common water heaters on the market have this problem, that is, the water cooled in the pipeline before use cannot be effectively used, and the user also has to wait for the cold water to drain before starting to take a bath.

This has led to two important problems facing the water heater: one is that the nozzle will flow out of the water heater to the cold water stored in the pipe between the nozzles every time the water heater switch is turned on, and this part of the water is usually wasted; the other is the solar water heater. It is difficult to achieve the effect of instant heating. If you want to develop solar water heaters, you must solve these two issues that the masses pay close attention to.

Utility model content

In order to solve the above problems, the utility model proposes a water-saving system for solar water heaters. The water-saving system uses a temperature-controlled single-chip microcomputer to connect solenoid valves at two nozzles to control the water in the water pipes of the water heater in different flow paths.

In order to achieve the above object, the utility model adopts the following technical solutions:

A water-saving system for a solar water heater, comprising a water heater, a water storage tank, a controller, a first water mixing valve, a second water mixing valve and a third water mixing valve, the third water mixing valve is connected to the water heater and the second water mixing valve respectively The valve is connected to the first water mixing valve, the other two water ports of the second water mixing valve are respectively connected to the water inlet of the water storage tank and the shower, and the other two water ports of the first water mixing valve are connected to the cold water pipe and the water storage tank respectively. The water outlet of the water tank is connected, and a first solenoid valve and a second solenoid valve are respectively provided between the second mixing valve, the shower and the water storage tank, and the first solenoid valve and the second solenoid valve are respectively connected to the controller .

A one-way valve is provided between the water storage tank and the first water mixing valve.

A temperature sensor connected to the controller is provided between the third water mixing valve and the water heater.

The controller is a single-chip microcomputer.

The beneficial effects of the utility model are:

(1) The utility model adopts a single-chip microcomputer to control the temperature sensor and the electromagnetic valve to form a signal circuit of "temperature collection-temperature analysis-temperature control". flow control;

(2) The utility model stores the water that has not reached the set temperature in the water storage tank, incorporates it into the cold water pipe for reuse, and saves the water source;

(3) The utility model is simple in structure, easy to manufacture, can be used in conjunction with all water heaters, and is easy to be popularized in a large range.

Description of drawings

Fig. 1 is the overall structure diagram of the utility model;

Among them, 1. the first water mixing valve, 2. the water storage tank, 3. the shower head, 4. the first solenoid valve, 5. the second water mixing valve, 6. the water heater, 7. the second solenoid valve, 8. the controller , 9, temperature sensor, 10, the third mixing valve.

detailed description:

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

As shown in Figure 1, a solar water heater water-saving system includes a water heater 6, a water storage tank 2, a controller 8, a first mixing valve 1, a second mixing valve 5 and a third mixing valve 10, the third mixing valve The water valve 10 is respectively connected with the water heater 6, the second water mixing valve 5 and the first water mixing valve 1, and the temperature sensor 9 connected with the controller 8 is arranged between the third water mixing valve 10 and the water heater 6, and the temperature sensor 9 adopts Conventional commercially available products, the specific model can be DS18B20 (its characteristics are: 1. Temperature measurement range -55℃～+125℃, wide measurement range; 2. Working power supply: 3.0～5.5V/DC (can be parasitic power supply of data line) ; 3. It is suitable for temperature measurement of DN15~25, DN40~DN250 various media industrial pipelines and narrow space equipment.) It has the characteristics of small size, low hardware overhead, strong anti-interference ability and high precision. The other two water ports of the second water mixing valve 5 are respectively connected to the water inlet of the water storage tank 2 and the shower 3, and the other two water ports of the first water mixing valve 1 are connected to the cold water pipe and the water outlet of the water storage tank 2 respectively. A one-way valve is provided between 2 and the first water mixing valve 1. A first solenoid valve 4 and a second solenoid valve 7 are respectively provided between the second water mixing valve 5 , the shower 3 and the water storage tank 2 , and the first solenoid valve 4 and the second solenoid valve 7 are respectively connected to a controller 8 . The controller 8 is a single-chip microcomputer, and a common 51 single-chip microcomputer can meet the control requirements.

The specific working principle is as follows: the water heater 6 flows through the water pipe and passes through the temperature sensor 9, and the temperature information is fed back to the single-chip microcomputer after being detected by the sensor. If the water temperature reaches a predetermined value, the first electromagnetic valve 4 is opened and the second electromagnetic valve 7 is closed. The cold water is mixed at the third mixing valve 10 and flows out from the shower 3 for use. If the water temperature does not reach the predetermined value, the first electromagnetic valve 4 is closed and the second electromagnetic valve 7 is opened. Since the water tank of the water heater 6 is higher than the water storage tank 2, the "hot water" with insufficient water temperature will be pressed into the water storage tank 2 for temporary storage. , until the water temperature at the temperature sensor 9 reaches a predetermined value, open the first solenoid valve 4 and close the second solenoid valve 7 again, at this time, the water in the water storage tank 2 will merge with the cold water pipe at the first mixing valve 1, and then The cold water in the cold water pipe flows down together and mixes with the hot water at the third water mixing valve 10, thereby saving water resources. Generally speaking, the whole device realizes the water-saving function that when the water in the hot water pipeline is cooled, it will not be released and wasted, but will be collected into the water storage tank 2, merged into the cold water pipe, and recycled. .

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (4)

1. a solar water heater water-saving system, it is characterized in that: comprise water heater, storage tank, controller, first mixed water valve, second mixed water valve and the 3rd mixed water valve, described 3rd mixed water valve respectively with water heater, second mixed water valve is connected with the first mixed water valve, two other mouth of a river of described second mixed water valve connects water inlet and the gondola water faucet of storage tank respectively, two other mouth of a river of described first mixed water valve is connected with the delivery port of cold water pipe and storage tank respectively, described second mixes water valve and is respectively equipped with the first magnetic valve and the second magnetic valve between gondola water faucet and storage tank, described first magnetic valve is connected with controller respectively with the second magnetic valve.

2. a kind of solar water heater water-saving system as claimed in claim 1, is characterized in that: be provided with check valve between described storage tank and the first mixed water valve.

3. a kind of solar water heater water-saving system as claimed in claim 1, is characterized in that: the described 3rd mixed is provided with the temperature sensor be connected with controller between water valve with water heater.

4. a kind of solar water heater water-saving system as claimed in claim 3, is characterized in that: described controller is single-chip microcomputer.