CN203893450U - Solar water heater with scale prevention and water storage functions - Google Patents

Abstract

The utility model provides a solar water heater with scale prevention and water storage functions. The solar water heater comprises an insulation water tank, a guide tube, a pressurized water tank, a plurality of collector tubes, a first valve, a second valve, a third valve, a fourth valve, a temperature sensor, a pressure sensor and a controller. The interior water temperature of the solar water heater is maintained in the reasonable temperature range, water heating capacity of the solar water heater is increased, efficient operation of the solar water heater is achieved, and less scale forms.

Description

A solar water heater with anti-scaling and water storage functions

technical field

The invention relates to a solar water heater with the functions of anti-scaling and water storage.

Background technique

Solar water heaters are a major industry in the application of solar energy achievements. With the advantages of environmental protection, safety, energy saving and sanitation, it quickly won the favor of consumers. China is a big energy consuming country. The annual national energy consumption accounts for about 1/3 of the world's total energy consumption. And 1/3 of the country's total energy consumption comes from building energy consumption. "To get energy from the roof", solar water heaters are energy-saving equipment that absorbs the radiant heat energy of the sun and heats cold water for people to use in life and production. Although the production and living needs are met, there are still some problems:

1) The production of hot water is limited by the annual average temperature, the annual sunshine hours, the total solar radiation and the area of the heat collecting tube. The amount of domestic hot water that can be provided is small and hot water cannot be guaranteed from time to time.

2) Under normal circumstances, the hot water temperature of solar water heaters can reach 50-70°C, and in summer, the hot water temperature can reach 70-90°C. The temperature difference between 40-45℃ and the suitable domestic water temperature for people is relatively large; and this temperature zone is an excellent temperature for bacteria to multiply in water. The water in conventional solar water heaters is likely to produce harmful substances such as nitrate and nitrite after repeated heating, and it is easy to breed pathogenic bacteria. Therefore, bathing with such water is not good for the skin, and long-term use of this water for bathing can cause skin diseases.

3) With conventional solar water heaters running for a long time, the inner wall of the water heater is prone to scaling. Please ask a professional to clean it. If the solar water heater is not cleaned frequently, it will not only reduce its use value, but also cause problems such as bursting and water leakage.

4) The operation of conventional solar water heaters mainly depends on the user's experience, which affects the performance of the water heater and even causes damage.

Solve the above-mentioned problem at present, people have figured out various ways. Chinese patent CN2425326 places the electric heating device in the auxiliary water tank of the solar water heater, possesses the advantages of the solar water heater and the electric water heater, and satisfies people's demand for hot water all the time. The Chinese patent CN201314712 adopts a mechanically controlled telescopic sunshade on the illuminated surface of the water heater to control the water temperature. Chinese patent CN102798239 adopts radiator to connect heat preservation water tank to control water temperature. Chinese patent CN201083448 and Chinese patent CN201407827 increase the fluidity of the water heater by changing the heat collecting tube and the water heater transformation. Although these technologies solve certain problems theoretically, they cannot solve the problems in an all-round way, and are rarely adopted by water heater manufacturers.

Contents of the invention

The technical problem to be solved by the present invention is to provide a solar water heater with anti-scaling and water storage functions, to keep the water temperature in the solar water heater within a reasonable temperature range, increase the amount of hot water in the water heater, and realize the efficient operation of the water heater At the same time, scale formation is reduced.

The present invention achieves the above-mentioned technical problems in this way: a solar water heater with the functions of anti-scaling and water storage, comprising an insulated water tank, a conduit, an air pressure water tank, a plurality of heat collector tubes, a first valve, a second valve, a third Valve, fourth valve, temperature sensor, pressure sensor and controller;

One end of each collector tube is connected to the heat preservation water tank, and the other end is connected to the conduit, and the heat preservation water tank is connected to the air pressure water tank through the first valve and the second valve connected in series , the conduit is connected to the air pressure water tank through the third valve and the fourth valve connected in series, one end of the pressure sensor is connected to the air pressure water tank, and the other end is connected to the controller, so One end of the temperature sensor is connected to the heat preservation water tank, and the other end is connected to the controller, and the controller is respectively connected to the first valve, the second valve, the third valve and the fourth valve.

Further, it also includes a fifth valve, a sixth valve and a water mixer, the insulated water tank is connected to the water mixer through the fifth valve, and the bottom of the air pressure water tank is connected to the water mixer through the sixth valve , the controller is respectively connected to the fifth valve and the sixth valve.

Further, the bottom end of the thermal insulation water tank is connected to the top end of the air pressure water tank through the first valve and the second valve connected in series, and the bottom end of the conduit is connected through the third valve and the second valve connected in series. The fourth valve is connected to the bottom end of the air pressure water tank.

Further, a float valve is provided in the heat preservation water tank.

Further, the first valve, the second valve, the third valve and the fourth valve are electromagnetic valves or butterfly valves.

Further, the conduit is a collector tube.

The invention has the following advantages: the solar water heater with anti-scaling and water storage functions is very reliable, can guarantee the normal and high-efficiency operation of the water heater; and is simple to operate, easy to install and construct, low in operation cost after installation and commissioning, and strong in applicability.

Description of drawings

The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is a structural schematic diagram of a solar water heater with anti-scaling and water storage functions according to the present invention.

Detailed ways

As shown in Figure 1, a preferred embodiment of the solar water heater of the present invention includes an insulated water tank 1, a conduit 2, an air pressure water tank 3, a plurality of collector tubes 4, a first valve 6, a second valve 7, and a third valve 8. A fourth valve 9, a temperature sensor 13, a pressure sensor 14 and a controller 5. A float valve (not shown in the figure) is provided in the heat preservation water tank 1. The first valve 6, the second valve 7, The third valve 8 and the fourth valve 9 are solenoid valves or butterfly valves, and the conduit 2 is a heat collector tube;

One end of each collector tube 4 is connected to the heat preservation water tank 1, and the other end is connected to the conduit 2, and the heat preservation water tank 1 is connected through the first valve 6 and the second valve 7 connected in series. To the air pressure water tank 3, specifically, the bottom end of the insulated water tank 1 is connected to the top end of the air pressure water tank 3 through the first valve 6 and the second valve 7 connected in series, so that the insulated water tank can The water in 1 enters the air pressure water tank 3 more easily, so that when the water level of the insulated water tank 1 is too low, no water enters the air pressure water tank 3, and the conduit 2 passes through the third valve 8 and the fourth valve in series. The valve 9 is connected to the air pressure water tank 3, specifically, the bottom end of the conduit 2 is connected to the bottom end of the air pressure water tank 3 through the third valve 8 and the fourth valve 9 connected in series, so that the air pressure The water in the water tank 3 enters the conduit 2 more easily, and one end of the pressure sensor 14 is connected to the air pressure water tank 3, the other end is connected to the controller 5, and one end of the temperature sensor 13 is connected to the The other end of the heat preservation water tank 1 is connected to the controller 5, and the controller 5 is respectively connected to the first valve 6, the second valve 7, the third valve 8 and the fourth valve 9.

This embodiment also includes a fifth valve 11, a sixth valve 10, and a water mixer 12, the insulated water tank 1 is connected to the water mixer 12 through the fifth valve 11, and the bottom of the air pressure water tank 3 is connected to the water mixer 12 through the fifth valve 11. The six valves 10 are connected to the water mixer 12, and the controller 5 is connected to the fifth valve 11 and the sixth valve 10 respectively.

The principle steps based on the above solar water heater are as follows:

Step 10S, set the temperature range interval [T1, T2] of the thermal insulation water tank 1 of the solar water heater (where T1<T2), for example, set T1 to 50°C and T2 to 70°C, and set the protection pressure range of the airtight air pressure water tank 3 Interval [P1, P2] (wherein P1<P2), for example, set P1 to 1.2mH2O, P2 to 2mH2O, set the normal operating condition and special operating condition of the solar water heater, the normal operating condition is to use the thermal insulation water tank Hot water, the special operating condition is to use hot water in a closed air pressure water tank;

Step 20S, the pressure probe 141 of the pressure sensor 14 measures the pressure P of the airtight air tank 3. When P is in the interval [P1, P2], the pressure sensor 14 sends a pressure signal command to the controller 5, and the controller 5 opens the second Valve 7, enter step 30S;

When P is greater than P2, the pressure sensor 14 gives a pressure signal instruction to the controller 5, and the controller 5 closes the second valve 7, and enters step 30S;

When P is less than P1, the pressure sensor 14 gives a pressure signal instruction to the controller 5, and the controller 5 closes the third valve 8 and the fourth valve 9, and enters step 30S;

Step 30S, the temperature probe 131 of the temperature sensor 13 measures the temperature T of the thermal insulation water tank 1. When T is greater than T2, the temperature sensor 13 gives a temperature signal command to the controller 5, and the controller 5 opens the first valve 6, and at the same time the thermal insulation water tank The water level of 1 drops, and the tap water fills the insulation water tank 1;

When T is in the interval [T1, T2], the temperature sensor 13 gives a temperature signal instruction to the controller 5, and the controller 5 closes the first valve 6;

When T is less than T1, the temperature sensor 13 gives a temperature signal instruction to the controller 5, and the controller 5 opens the first valve 6, the third valve 8, and the fourth valve 9;

Step 40S, according to the water level of the solar thermal insulation water tank 1 and the water level of the airtight air pressure water tank 3, the solar water heater uses the hot water in the insulated water tank or the hot water in the airtight air pressure water tank; if the hot water in the insulated water tank is used, the controller 5 Control the fifth valve 11 to open and the sixth valve 10 to close; if the hot water in the air pressure water tank 3 is used, the controller 5 controls the fifth valve 11 to close and the sixth valve 10 to open.

Wherein the linkage of the first valve 6, the second valve 7, the third valve 8 and the fourth valve 9 is electric or hydraulic transmission.

The invention has the following advantages: the solar water heater with anti-scaling and water storage functions is very reliable, can guarantee the normal and high-efficiency operation of the water heater; and is simple to operate, easy to install and construct, low in operation cost after installation and commissioning, and strong in applicability.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments we have described are only illustrative, rather than used to limit the scope of the present invention. Equivalent modifications and changes made by skilled personnel in accordance with the spirit of the present invention shall fall within the protection scope of the claims of the present invention.

Claims (6)

1. a solar water heater with antiscale and water storage function, is characterized in that: comprise attemperater, conduit, auto-pneumatic cylinder, complex root thermal-arrest organ pipe, the first valve, the second valve, the 3rd valve, the 4th valve, temperature sensor, pressure sensor and controller;

One end of every described thermal-arrest organ pipe is connected to described attemperater, the other end is connected to described conduit, described attemperater is connected to described auto-pneumatic cylinder by described the first valve and described second valve of series connection, described conduit is connected to described auto-pneumatic cylinder by described the 3rd valve and described the 4th valve of series connection, one end of described pressure sensor is connected to described auto-pneumatic cylinder, the other end is connected to described controller, one end of described temperature sensor is connected to described attemperater, the other end is connected to described controller, described controller connects respectively described the first valve, the second valve, the 3rd valve and the 4th valve.

2. a kind of solar water heater with antiscale and water storage function according to claim 1, it is characterized in that: also comprise the 5th valve, the 6th valve and water-water jet, described attemperater is connected to described water-water jet by described the 5th valve, described auto-pneumatic cylinder bottom is connected to water-water jet by the 6th valve, and described controller connects respectively described the 5th valve and the 6th valve.

3. a kind of solar water heater with antiscale and water storage function according to claim 1, it is characterized in that: described attemperater bottom is connected to described auto-pneumatic cylinder top ends by described the first valve and described second valve of series connection, described conduit bottom is connected to described auto-pneumatic cylinder bottom by described the 3rd valve and described the 4th valve of series connection.

4. according to a kind of solar water heater with antiscale and water storage function described in claim 1,2 or 3, it is characterized in that: in described attemperater, be provided with ball-cock assembly.

5. a kind of solar water heater with antiscale and water storage function according to claim 1, is characterized in that: described the first valve, described the second valve, described the 3rd valve and described the 4th valve are magnetic valve or butterfly valve.

6. a kind of solar water heater with antiscale and water storage function according to claim 1, is characterized in that: described conduit is thermal-arrest organ pipe.