CN207991002U - Solar water heating system - Google Patents

Abstract

The purpose of this invention is to provide a solar water heating system that avoids the waste of cold water stored in the pipes between the solar water heater and the hot water tap, thereby achieving water conservation. The solar water heating system of this invention includes a controller, a solar water heater, a water pump, and a hot water tap. The inlet of the solar water heater is connected to the outlet of the water pump and a tap water pipe via an inlet electrically controlled two-way valve, allowing the inlet of the solar water heater to be selectively connected to either the outlet of the water pump or the tap water pipe. The inlet of the water pump is connected to the hot water tap via a return pipe. The outlet of the solar water heater is connected to the hot water tap via a hot water pipe. The controller is connected to both the inlet electrically controlled two-way valve and the water pump.

Description

Solar water heating system

technical field

The utility model relates to a solar water heating system.

Background technique

Solar water heaters use solar energy to heat water, which has the advantage of saving energy and is widely used throughout our country. Solar water heaters are generally installed on the roof of the building, and they are at a certain distance from the user's hot water faucet. In order to wait for the water temperature to be adjusted to a suitable temperature, a part of the clean water that was originally stored in the pipeline between the solar water heater and the hot water faucet must be wasted. Water, according to statistics, every time the wasted water reaches several liters on average, and for families that use hot water every day, the water fee for this part is also a considerable expense, so it is necessary to design a Partially resourced solar hot water system.

Contents of the invention

The purpose of this utility model is to propose a solar water heating system, which can avoid the waste of cold water stored in the pipeline between the solar water heater and the hot water faucet, thereby realizing the purpose of water saving.

The solar water heating system of the utility model includes a controller, a solar water heater, a water pump and a hot water faucet. The water outlet is alternatively connected with the water outlet of the water pump and the tap water pipe; the water inlet of the water pump is connected with the hot water faucet through the return pipe; the water outlet of the solar water heater is connected with the hot water faucet through the hot water pipe; Two-way valve, water pump connection.

Further, the controller is a single-chip microcomputer, and the control is simpler and more reliable.

Further, the return pipe, the hot water pipe, and the hot water faucet are connected through a three-way valve, so that the return pipe and the hot water pipe are closer to the hot water faucet, and the cold water in the hot water pipe can be returned to the solar water heater through the return pipe for further heating. heating.

The above-mentioned control method of the solar water heating system specifically includes the following steps:

First turn off the hot water faucet, and then use the controller to control the water inlet electric control two-way valve, so that the water inlet of the solar water heater is only connected to the water outlet of the water pump, and at the same time use the controller to control the start of the water pump, so that the water in the hot water pipe and the return pipe Under the action of the water pump, the water flows back into the solar water heater; when the water temperature at the hot water tap reaches the predetermined temperature, use the controller to control the water inlet electric control two-way valve, so that the water inlet of the solar water heater is only connected to the tap water pipe , turn off the water pump and open the hot water faucet at the same time, make the water in the solar water heater flow to the hot water faucet through the hot water pipe, and use the tap water pipe to replenish water for the solar water heater.

The working principle of the above solar water heating system is as follows:

First, set the temperature of the solar water heater. For example, set the outlet water temperature to 36°C. In normal conditions, both the hot water faucet and the water pump are closed, and the water inlet electric control two-way valve makes the water inlet of the solar water heater only connected to the tap water pipe. , the solar water heater is replenished by the tap water pipe, and the water in the solar water heater is heated by sunlight to heat up.

When you need to use hot water, first turn off the hot water tap, and then use the controller to control the water inlet electric control two-way valve, so that the water inlet of the solar water heater is only connected to the water outlet of the water pump, and at the same time use the controller to control the start of the water pump, so that the solar energy The water heater, the hot water pipe, the return pipe and the water pump constitute a closed water circulation pipeline. The water in the hot water pipe and the return pipe all flows back to the solar water heater under the action of the water pump, and the hot water in the solar water heater It will flow into the hot water pipe to replenish water for the hot water pipe; when the cold water in the hot water pipe has been replaced by the hot water replenished by the solar water heater (that is, when the water temperature at the hot water faucet reaches the predetermined temperature), turn on the hot water faucet and turn it off at the same time Water pump, and use the water inlet electric control two-way valve to make the water inlet of the solar water heater only communicate with the tap water pipe. At this time, the tap water pipe, solar water heater, hot water pipe and hot water faucet form a path, and the tap water replenishes the solar water heater. , The hot water in the solar water heater flows continuously to the hot water faucet through the hot water pipe.

In the above process, when hot water is needed, the cold water accumulated in the hot water pipe between the solar water heater and the hot water faucet will not flow directly through the hot water faucet and be wasted, but will flow back into the solar water heater through the return pipe After heating, when the water temperature at the hot water tap is suitable, the hot water can be used directly, thus reducing the waste of water.

Compared with the traditional solar water heating system, the solar water heating system of the utility model adds a water pump and a return pipe, which can automatically return the cold water accumulated in the hot water pipe between the solar water heater and the hot water tap to the solar water heater for heating , reducing the waste of this part of the water.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the solar water heating system of the present invention.

The drawings indicate: 1. controller; 2. solar water heater; 3. water pump; 4. hot water faucet; 5. water inlet electric control two-way valve;

Detailed ways

Below with reference to the accompanying drawings, through the description of the implementation examples, the specific embodiments of the present utility model, such as the shape, structure, mutual position and connection relationship between each part, the role and working principle of each part, etc. Further details.

Example 1:

As shown in Figure 1, the solar water heating system of this embodiment includes a controller 1, a solar water heater 2, a water pump 3 and a hot water faucet 4. The water outlet and the water pipe 6 are connected so that the water inlet of the solar water heater 2 is connected with the water outlet of the water pump 3 and the water pipe 6; the water inlet of the water pump 3 is connected with the hot water tap 4 through the return pipe 7; The water outlet is connected to the hot water faucet 4 through the hot water pipe 8; the controller 1 is connected to the water inlet electric control two-way valve 5 and the water pump 3 respectively.

The above-mentioned control method of the solar water heating system specifically includes the following steps:

First turn off the hot water faucet 4, then use the controller 1 to control the water inlet electric control two-way valve 5, so that the water inlet of the solar water heater 2 is only connected with the water outlet of the water pump 3, and at the same time use the controller 1 to control the water pump 3 to start, so that the heat The water in the water pipe 8 and the water return pipe 7 flows back to the solar water heater 2 under the action of the water pump 3; 5. Make the water inlet of the solar water heater 2 communicate with the tap water pipe 6 only, turn off the water pump 3 and open the hot water faucet 4 at the same time, make the water in the solar water heater 2 flow to the hot water faucet 4 through the hot water pipe 8, and use the tap water pipe 6 to 2 solar water heaters to replenish water.

The working principle of the above solar water heating system is as follows:

First, set the temperature of the solar water heater 2, for example, set the outlet water temperature to 36°C. In the normal state, the hot water faucet 4 and the water pump 3 are all closed, and the water inlet electric control two-way valve 5 makes the water inlet of the solar water heater 2 only It communicates with the running water pipe 6, and the solar water heater 2 is supplied with water by the running water pipe 6, and the water in the solar water heater 2 is heated by sunlight to heat up.

When hot water needs to be used, first turn off the hot water faucet 4, and then use the controller 1 to control the water inlet electric control two-way valve 5, so that the water inlet of the solar water heater 2 is only connected to the water outlet of the water pump 3, and at the same time use the controller 1 Control water pump 3 to start, solar water heater 2, hot water pipe 8, return water pipe 7, water pump 3 just constitute a closed water circulation pipeline like this, the water in hot water pipe 8 and return water pipe 7 is under the effect of water pump 3, all Flow back into the solar water heater 2, while the hot water in the solar water heater 2 will flow into the hot water pipe 8 to replenish water for the hot water pipe 8; when the cold water in the hot water pipe 8 has been replenished by the solar water heater 2 After the replacement (that is, when the water temperature at the hot water tap 4 reaches the predetermined temperature), turn on the hot water tap 4 and turn off the water pump 3 at the same time, and use the water inlet electric control two-way valve 5 to make the water inlet of the solar water heater 2 only connected to the water pipe 6 Pipe connected, now tap water pipe 6, solar water heater 2, hot water pipe 8 and hot water faucet 4 have just formed a path, and tap water replenishes water for solar water heater 2, and the hot water in solar water heater 2 flows through hot water pipe 8 continuously to hot water tap4.

In the above process, when hot water is needed, the cold water accumulated in the hot water pipe 8 between the solar water heater 2 and the hot water faucet 4 will not flow directly through the hot water faucet 4 and be wasted, but will flow through the return pipe 7 Go back to the solar water heater 2 for heating. After the water temperature at the hot water tap 4 is suitable, you can directly use hot water, which reduces the waste of water.

Claims (3)

1. A solar water heating system is characterized in that comprising a controller, a solar water heater, a water pump and a hot water tap, and the water inlet of the solar water heater is connected to the water outlet and the running water pipe of the water pump respectively by the water inlet electric control two-way valve, so that The water inlet of the solar water heater is connected with the water outlet of the water pump and the water pipe; the water inlet of the water pump is connected with the hot water faucet through the return pipe; the water outlet of the solar water heater is connected with the hot water faucet through the hot water pipe; Water inlet electric control two-way valve, water pump connection. 2. The solar water heating system according to claim 1, characterized in that the controller is a single-chip microcomputer. 3. The solar water heating system according to claim 1, characterized in that the return pipe, the hot water pipe, and the hot water faucet are connected by a three-way valve.