CN206073216U - A kind of solar energy hot water supply system - Google Patents

Abstract

The utility model relates to the technical field of solar thermal utilization, in particular to a solar hot water supply system, aiming to solve the technical defects of relatively large power consumption and insufficient all-weather water comfort in the existing solar hot water supply device. Compared with the prior art, the solar hot water supply device provided by the utility model fully considers the characteristics of solar energy. The cold water first enters the solar heat collector for heating, fully and preferentially utilizes the solar energy, and at the same time reduces the starting frequency of the solar circulating water pump. Heating achieves the purpose of reducing energy consumption and improving energy-saving effects. At the same time, it also takes advantage of the energy-saving advantages of air source heat pumps to ensure that users have stable hot water available throughout the day and improve water comfort.

Description

A solar hot water supply system

technical field

The utility model relates to the technical field of solar heat utilization, in particular to a solar hot water supply system.

Background technique

Solar energy is the most important renewable and clean energy. Using solar energy to supply hot water is the most mature and popular renewable energy technology in solar thermal utilization, and it is widely used in people's daily life. However, existing solar hot water supply devices still have the disadvantages of high power consumption and insufficient water comfort.

For example, an existing solar hot water supply device shown in Figure 1 includes a hot water storage tank 1, an air source heat pump 2, a solar collector 3, a solar circulation pump 4, a heat pump circulation pump 5, Water pump 6, water inlet solenoid valve 7, water return solenoid valve 8, exhaust valve 9, liquid level detection device 10, and four temperature collection points are set to collect four temperatures T1, T2, T3, T4 in real time, respectively, as shown in Fig. The direction of the middle arrow indicates the flow direction of water. The cold water supply of the solar hot water supply device shown in Figure 1 mainly relies on the pressure of tap water itself or the booster pump to enter the solar hot water storage tank 1, when the temperatures T1 and T2 of the temperature collection points shown in Figure 1 reach the set temperature difference The solar circulation pump 4 draws cold water from the bottom of the solar hot water storage tank 1 into the solar heat collector 3 to receive sunlight, thereby heating the water in the solar hot water storage tank 1 . The air source heat pump 2 is controlled by the temperature T3 of the hot water storage tank. When T3 is lower than the set temperature value, it starts heating, and when it reaches the set value, it stops heating. This device belongs to the category of prior art, and details are not repeated here.

The power consumption of the above-mentioned solar hot water supply device is relatively large, and the water comfort is not enough. This is because the solar collector and the air source heat pump are heated to the same hot water storage tank 1, and there is no hierarchical heating, so priority cannot be achieved. Utilizing solar energy, cold water directly enters the hot water storage tank 1, which will make the water temperature of the water tank unstable and affect the comfort of water use.

Utility model content

In view of the above problems, the utility model provides a solar hot water supply system, which aims to solve the technical defects of the existing solar hot water supply device, such as high power consumption and insufficient water comfort in all weathers.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

A solar hot water supply system, including a hot water storage tank, an air source heat pump, a solar heat collector, a solar circulation pump and a heat pump circulation pump. The partition is divided into two parts, one part is the solar heating section, and the other is the constant temperature heating section. The solar heating section and the solar collector are connected in two directions through pipelines. The solar circulation pump is installed on one of the pipelines, and the other pipeline is equipped with exhaust The air valve, the constant temperature heating section and the air source heat pump are connected bidirectionally through pipelines. The heat pump circulation pump is installed on one of the pipelines. The water inlet electromagnetic valve is connected with a cold water inlet pipeline.

Further, the solar heating section is connected with the constant temperature heating section, the bottom of the constant temperature heating section is provided with a hot water outlet pipe, the hot water outlet pipe is provided with a hot water supply pump, and the top of the solar heating section is provided with a hot water outlet pipe. The return water pipeline is provided with a return water solenoid valve on the hot water return pipeline.

Beneficial effects of the utility model:

Compared with the prior art, the solar hot water supply device provided by the utility model fully considers the characteristics of solar energy. The cold water first enters the solar heat collector for heating, fully and preferentially utilizes the solar energy, and at the same time reduces the starting frequency of the solar circulating water pump. Heating achieves the purpose of reducing energy consumption and improving energy-saving effects. At the same time, it also takes advantage of the energy-saving advantages of air source heat pumps to ensure that users have stable hot water available throughout the day and improve water comfort.

Description of drawings

Fig. 1 is the overall structural diagram of existing solar water heating system;

Fig. 2 is the overall structural diagram of the solar water heating system of the utility model.

21. Hot water storage tank; 22. Air source heat pump; 23. Solar collector; 24. Solar circulation pump; 25. Heat pump circulation pump; 26. Hot water supply pump; 27. Inlet solenoid valve 1; 28. Back Water solenoid valve; 29. Exhaust valve; 210. Liquid level detection device; 211. Water inlet solenoid valve 2; T21. Water temperature in the upper part of the solar collector; T22. Water temperature in the lower part of the heating section of the hot water storage tank; T23. The water temperature of the lower part of the heating section of the hot water tank; T24. The water temperature of the return port.

detailed description

The technical scheme of the present utility model is described below in conjunction with accompanying drawing and embodiment.

As shown in Figure 2, a solar hot water supply system described in the utility model includes a hot water storage tank 21, an air source heat pump 22, a solar heat collector 23, a solar circulation pump 24 and a heat pump circulation pump 25, the hot water storage The tank 21 is provided with a liquid level detection device 210, and the inside of the hot water storage tank 21 is divided into two parts by an intermediate partition, one part is a solar heating section, and the other is a constant temperature heating section, and the solar heating section and the solar collector 23 pass through the pipeline Two-way connection, the solar circulation pump 24 is set on one of the pipelines, the other pipeline is provided with an exhaust valve 29, the constant temperature heating section and the air source heat pump 22 are connected in two directions through the pipeline, and the heat pump circulation pump 25 is set on one of the pipelines, The solar heat collector 23 bottom is connected with the cold water inlet pipeline by the water inlet solenoid valve two 211, and the hot water storage tank 21 bottom is connected with the cold water inlet pipeline by the water inlet solenoid valve one 27. The solar heating section is connected with the constant temperature heating section, and the bottom of the constant temperature heating section is provided with a hot water outlet pipe. The hot water outlet pipe is provided with a hot water supply pump 26. The top of the solar heating section is provided with a hot water return pipe. The water return pipeline is provided with a return solenoid valve 28.

The utility model adopts such structural settings, and its work flow:

When the solar energy is sufficient, when the liquid level detection device 210 of the hot water storage tank 21 detects that the water level is in a water shortage state, and the water temperature T21 on the upper part of the solar collector 23 is higher than a certain set value, the water inlet solenoid valve 2 211 is opened, The cold water enters the solar heat collector 23 first, and pushes the hot water on the upper part of the solar heat collector 23 into the hot water storage tank 21 until the water temperature T21 on the upper part of the solar heat collector 23 is lower than a certain set value or the hot water storage tank 21 When it is full of water, the water inlet solenoid valve 2 211 is closed to stop replenishing water. When solar energy is insufficient, when the liquid level detection device 210 of the hot water supply tank 21 detects that the water level is in a water shortage state, and the water temperature T24 of the constant temperature heating section of the hot water storage tank 21 is higher than a certain set value, the water inlet solenoid valve one 27 Open, the cold water first enters the bottom of the solar heating section of the hot water storage tank 21, thereby pushing the hotter water on the upper part of the solar heating section of the hot water storage tank 21 into the constant temperature heating section in the hot water storage tank 21 until the hot water storage tank 21 is full water. After the hot water storage tank 21 is full of water, the operation of the solar circulation pump 24 adopts temperature difference type forced circulation heating. Set value, such as T21－T22≥7℃, then the solar circulation pump 24 starts to run, and transports the low-temperature water at the bottom of the solar heating section of the hot water storage tank 21 to the solar collector 23 to be heated by the sun. , when the temperature difference between the water temperature T21 at the upper part of the solar heat collector 23 and the water temperature T22 at the lower part of the solar heating section of the hot water storage tank 21 is lower than a certain set value, such as T21-T22≤2°C, the solar circulation pump 24 stops working. When encountering rainy weather, the solar radiation intensity is weak, when the water temperature T23 entering the constant temperature heating section of the hot water storage tank 21 is lower than a certain set value, the air source heat pump 22 starts heating until the constant temperature heating section of the hot water storage tank 21 When the water temperature T23 reaches the set value, the air source heat pump 22 stops heating to ensure that the water temperature of the hot water supply is constant. In addition, T24 is the water temperature of the return water port.

Embodiments of the present utility model have been described above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned specific implementation, and the above-mentioned specific implementation is only illustrative, rather than restrictive. Under the enlightenment of the utility model, personnel can also make many forms without departing from the scope of protection of the purpose of the utility model and claims, and these all belong to the protection of the utility model.

Claims (2)

1. A solar hot water supply system, comprising a hot water storage tank (21), an air source heat pump (22), a solar heat collector (23), a solar circulation pump (24) and a heat pump circulation pump (25), its characteristics That is, the hot water storage tank (21) is provided with a liquid level detection device (210), and the inside of the hot water storage tank (21) is divided into two parts by a middle partition, one part is a solar heating section, and the other part is a constant temperature section. The heating section, the solar heating section and the solar collector (23) are bidirectionally connected through pipelines, the solar circulation pump (24) is installed on one of the pipelines, and an exhaust valve (29) is installed on the other pipeline. The constant temperature heating section and the air source heat pump (22) are bidirectionally connected through pipelines, the heat pump circulation pump (25) is installed on one of the pipelines, and the lower part of the solar collector (23) passes through the water inlet solenoid valve 2 (211) A cold water inlet pipe is connected, and the lower part of the hot water storage tank (21) is connected with a cold water inlet pipe through a water inlet electromagnetic valve one (27). 2. A solar hot water supply system according to claim 1, characterized in that the solar heating section communicates with the constant temperature heating section, and the bottom of the constant temperature heating section is provided with a hot water outlet pipe, so A hot water supply pump (26) is provided on the hot water outlet pipe, a hot water return pipe is provided on the top of the solar heating section, and a return solenoid valve (28) is provided on the hot water return pipe.