CN207050206U - Photovoltaic double-water-tank system - Google Patents

Abstract

The utility model relates to a photovoltaic double water tank system, which comprises a first water tank and a first electric heating tube. The first electric heating tube is used for electrical connection with a photovoltaic panel. The water inlet and the first water outlet also include a first temperature sensor, a second water tank and a water pump. The first temperature sensor is used to measure the water temperature of the first water tank. The second water tank is provided with a second water inlet and a second water outlet. A water inlet communicates with the second water inlet through the first pipeline, the first water outlet communicates with the second water outlet through the second pipeline, and the water pump is arranged on the first pipeline and/or the second pipeline. When the solar energy is sufficient, the photovoltaic panel can heat the water in the first water tank and the water in the second water tank through the first heating pipe, thereby improving the utilization rate of solar energy.

Description

Photovoltaic double water tank system

technical field

The utility model relates to the technical field of hot water storage tanks, in particular to a photovoltaic double water tank system.

Background technique

In the traditional photovoltaic water tank system, due to factors such as unstable sunlight and low photovoltaic conversion efficiency, the heat production of photovoltaic water heaters is extremely unstable, resulting in low solar energy utilization. For example, when the solar irradiance is relatively strong in summer, the photovoltaic panels generate more power, and the water temperature in the water tank quickly reaches the preset hot water temperature, resulting in waste of excess photovoltaic power. Therefore, the traditional photovoltaic water tank system has the problem of low solar energy utilization.

Utility model content

Based on this, it is necessary to provide a photovoltaic double water tank system with high solar energy utilization rate to solve the problem of low solar energy utilization rate.

A photovoltaic double water tank system, comprising a first water tank and a first electric heating tube, the first electric heating tube is used for electrical connection with a photovoltaic panel, the first electric heating tube is installed in the first water tank, and the first water tank It is provided with a first water inlet and a first water outlet, and also includes a first temperature sensor, a second water tank and a water pump, the first temperature sensor is used to measure the water temperature of the first water tank, and the second water tank is provided with a second Two water inlets and a second water outlet, the first water inlet communicates with the second water inlet through a first pipeline, the first water outlet communicates with the second water outlet through a second pipeline, and the water pump Set in the first pipeline and/or the second pipeline.

Compared with the background technology, the photovoltaic double water tank system described in the present invention has the beneficial effects: when the solar energy is sufficient, such as on a sunny day in summer, the photovoltaic panels generate more electricity, and the water temperature of the first water tank is greater than or equal to the first preset temperature value, the water pump runs to deliver the cold water in the second water tank to the first water tank through the first pipe, and at the same time, the hot water in the first water tank flows to the second water tank through the second pipe, so that the water in the first water tank is continuously heated , and then the cold water circulation of the second water tank is heated. In this way, when the solar energy is sufficient, the photovoltaic panel can heat the water in the first water tank and the water in the second water tank through the first heating pipe, thereby improving the utilization rate of solar energy.

In one of the embodiments, the photovoltaic double water tank system further includes an electric heating pipe controller and a second electric heating pipe connected to the mains, the second electric heating pipe is installed in the second water tank, and the electric heating pipe controller electrically connected to the first electric heating tube to control the start and stop of the first electric heating tube, and the electric heating tube controller is electrically connected to the second electric heating tube to control the start and stop of the second electric heating tube stop. When the solar energy is sufficient, the electric heating pipe controller controls the first electric heating pipe to turn on to use solar energy to heat the water in the first water tank, and even use solar energy to indirectly heat the water in the second water tank with the help of a water pump, so as to maximize the use of energy saving and environmental protection of solar energy resources. When the water temperature in the first water tank cannot meet the needs of users and the solar energy is insufficient, the electric heating pipe controller controls the second electric heating pipe to turn on, so that the second electric heating pipe heats the water in the second water tank to provide hot water for users. Only when the water temperature in the first water tank is low and the solar energy is insufficient, the above-mentioned photovoltaic double water tank system uses the second electric heating pipe connected to the mains. In this way, the above-mentioned photovoltaic double water tank system preferentially uses solar energy, which can improve the utilization rate of solar energy and achieve the effect of environmental protection and energy saving.

In one of the embodiments, the photovoltaic double water tank system further includes a water inlet pipe and a water outlet pipe, the first end of the water inlet pipe is used to communicate with an external water pipe, the second end of the water inlet pipe is connected to the first pipeline, The first end of the water outlet pipe is the water end, the second end of the water outlet pipe is connected to the second pipe, the water inlet pipe communicates with the water outlet pipe through the first branch pipe, and the first branch pipe is connected to the water outlet pipe. A flow control device is provided at the joint of the water outlet pipe. The water inlet pipe communicates with the water outlet pipe through the first branch pipe, so that the cold water in the water inlet pipe is mixed with the hot water in the water outlet pipe. The flow control device is arranged at the junction of the first branch pipe and the water outlet pipe, and is used to control the mixing ratio of the cold water in the water inlet pipe and the hot water in the water outlet pipe to meet the user's requirements for water temperature.

In one of the embodiments, the photovoltaic double water tank system further includes a general controller, a second temperature sensor, a third temperature sensor and a fourth temperature sensor, and the second temperature sensor is used to measure the water temperature of the second water tank , the third temperature sensor is used to measure the water temperature of the water inlet pipe, the fourth temperature sensor is used to measure the water temperature of the second pipe, the master controller is connected with the electric heating pipe controller, the The first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor and the flow control device are electrically connected. The master controller is electrically connected to the first temperature sensor and the second temperature sensor to obtain the water temperature information of the first water tank and the second water tank, and then controls the electric heating pipe controller to control the work of the first heating pipe and the second heating pipe state, so as to maximize the use of solar energy, save the use of city electricity, and achieve the effects of saving operating costs and energy conservation and environmental protection. In addition, the master controller is electrically connected with the third temperature sensor and the fourth temperature sensor in real time, so as to obtain the cold water temperature information of the water inlet pipe and the hot water temperature information of the water outlet pipe, and then control the flow control device to accurately control the cold water flow of the water inlet pipe. The mixing ratio with the hot water from the outlet pipe is used to maintain the constant temperature of the outlet water at the water end.

In one of the embodiments, the photovoltaic double water tank system further includes a first on-off valve, a second on-off valve and a third on-off valve, the first on-off valve is installed on the water inlet pipe, and the first branch pipe is located at Between the first end of the water inlet pipe and the first on-off valve; the second on-off valve is installed on the first pipe, and the second end of the water inlet pipe is located between the second on-off valve and the first on-off valve. Between a water inlet; the middle part of the water inlet pipe communicates with the first pipe through the second branch pipe, and the third switch valve is installed in the second branch pipe; the master controller is respectively connected with the water pump, the The first switch valve, the second switch valve and the third switch valve are electrically connected. When the water temperature of the first water tank is greater than or equal to the first preset temperature, the master controller controls the first on-off valve to close, the second on-off valve to open, and the third on-off valve to close, so that the first water inlet and the second water inlet are connected. , the cold water in the second water tank is sent to the first water tank, and the hot water in the first water tank is sent to the second water tank, so that the water in the first water tank and the water in the second water tank realize heat exchange, and indirectly use photovoltaic panels to the second water tank. The water in the water tank is heated, thereby improving the utilization rate of solar energy. When the photovoltaic panel voltage is greater than or equal to the preset voltage value, the solar energy is sufficient at this time, therefore, the general controller controls the first heating pipe to be turned on through the heating pipe controller, and when the water temperature in the first water tank is greater than the first preset value, and When someone uses water, the master controller controls the opening of the first on-off valve, the closing of the second on-off valve and the opening of the third on-off valve, so that the water in the water inlet pipe flows into the first water tank from the first water inlet, and the hot water in the first water tank flows from the first water inlet to the first water tank. The water outlet flows to the water outlet pipe, and the hot water in the first water tank can be preferentially used to provide hot water for users, and the solar energy can be utilized to the greatest extent. When the sunlight is weak and it is time for water use, the master controller controls the opening of the second heating pipe through the heating pipe controller, and uses the mains power to heat the water in the second water tank. The valve is opened and the third switching valve is closed, so that the cold water in the water inlet pipe flows into the second water tank from the second water inlet, and the hot water in the second water tank flows from the second water outlet to the water outlet pipe, thereby ensuring the rational use of the mains power and ensuring Users can use water in time, safely and conveniently.

In one of the embodiments, the general controller is provided with an input device for inputting a preset number of people.

In one of the embodiments, the capacity of the second water tank is greater than the capacity of the first water tank. The capacity of the first water tank is small, so that the first heating tube can heat the water in the first water tank even when the light is weak, thereby effectively utilizing solar energy. When the light is strong, after the first heating pipe heats the water in the first water tank, the water pump sends the cold water in the second water tank to the first water tank, and the first heating pipe indirectly heats the water in the second water tank, so as to make full use of solar energy .

In one embodiment, the first water tank is provided with a first sewage outlet, and/or the second water tank is provided with a second sewage outlet. Dirt and sundries in the first water tank are discharged from the first water tank through the first sewage outlet, and therefore, the first sewage outlet facilitates cleaning and maintenance operations on the first water tank. Similarly, the second sewage outlet is conducive to cleaning and maintenance operations on the second water tank.

In one of the embodiments, the first water tank includes a first shell, a first insulation layer and a first liner, the first liner is arranged in the first shell, and the first heat preservation layer is set in between the first shell and the first liner;

And/or, the second water tank includes a second shell, a second heat-insulating layer and a second liner, the second liner is set in the second shell, and the second heat-insulating layer is set in the first Between the second shell and the second inner tank.

Description of drawings

Fig. 1 is the structural representation of the photovoltaic double water tank system described in the utility model embodiment;

Figure 2 is an enlarged view of A in Figure 1;

Fig. 3 is a structural schematic diagram of the water circulation between the first water tank and the second water tank in the embodiment of the utility model;

Fig. 4 is the schematic diagram of the water mode of the first water tank in the embodiment of the present invention;

Fig. 5 is the schematic diagram of the water mode of the second water tank in the embodiment of the present invention;

Fig. 6 is a flow chart of the control method of the photovoltaic double water tank system in the embodiment of the present invention.

100, the first water tank, 101, the first electric heating tube, 102, the first water inlet, 103, the first water outlet, 104, the first temperature sensor, 105, the first sewage outlet, 200, the second water tank, 201, the first Second water inlet, 202, second water outlet, 203, second electric heating pipe, 204, second temperature sensor, 205, second sewage outlet, 300, water pump, 401, first pipeline, 402, second pipeline, 403, Water inlet pipe, 404, water outlet pipe, 405, first branch pipe, 406, flow control device, 407, third temperature sensor, 408, fourth temperature sensor, 409, first switch valve, 410, second switch valve, 411, The third switching valve.

detailed description

In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. Preferred embodiments of the utility model are provided in the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only. The "first", "second", "third" and "fourth" mentioned in the present utility model do not represent the specific quantity and order, but are only used to distinguish the names.

As shown in FIG. 1 , a photovoltaic double water tank system includes a first water tank 100 , a first electric heating tube 101 , a first temperature sensor 104 , a second water tank 200 and a water pump 300 . The first electric heating pipe 101 is used to electrically connect with the photovoltaic panel. The first electric heating tube 101 is installed in the first water tank 100 . The first water tank 100 is provided with a first water inlet 102 and a first water outlet 103 . The first temperature sensor 104 is used to measure the water temperature of the first water tank 100 . The second water tank 200 is provided with a second water inlet 201 and a second water outlet 202 . The first water inlet 102 communicates with the second water inlet 201 through a first pipe 401 . The first water outlet 103 communicates with the second water outlet 202 through the second pipe 402 . The water pump 300 is disposed on the first pipeline 401 and/or the second pipeline 402 .

Compared with the background technology, the photovoltaic double water tank system of the present utility model has the beneficial effects: when the solar energy is sufficient, such as on a sunny day in summer, the photovoltaic panels generate more electricity, and the water temperature of the first water tank 100 is greater than or equal to the first preset temperature value . The water pump 300 operates to deliver the cold water in the second water tank 200 to the first water tank 100 through the first pipe 401, and at the same time, the hot water in the first water tank 100 flows to the second water tank 200 through the second pipe 402, thereby making the first water tank The water in 100 is continuously heated, and then the cold water in the second water tank 200 is circulated and heated. In this way, when the solar energy is sufficient, the photovoltaic panel can heat the water in the first water tank 100 and the water in the second water tank 200 through the first heating pipe, thereby improving the utilization rate of solar energy.

In addition, due to unstable solar energy and low photovoltaic conversion efficiency that will affect the amplification of photovoltaic panels, it is difficult to determine the hot water produced by photovoltaic water heaters. In the above photovoltaic double water tank system, when the sunlight is sufficient, the water pump 300 can circulate and exchange the water in the first water tank 100 and the water in the second water tank 200, so that the first heating tube directly heats the water in the first water tank 100 and indirectly heats the water in the second water tank 100. Water tank 200. When the sunlight is insufficient, the water in the first water tank 100 and the second water tank 200 does not circulate and exchange, and the first electric heating tube 101 only heats the water in the first water tank 100 . In this way, when the hot water generated by the photovoltaic water heater is difficult to determine, the above-mentioned photovoltaic double water tank system can maximize the use of solar energy and improve the utilization rate of hot water of the photovoltaic water heater, thereby saving operating costs and achieving the effect of environmental protection and energy saving.

In addition, the above-mentioned photovoltaic double water tank system facilitates the transformation of traditional photovoltaic water heaters. For example, the staff can install the second water tank 200 and the water pump 300 on the basis of the traditional photovoltaic water heater, so as to have the technical effect of utilizing solar energy to the greatest extent.

Further, as shown in FIG. 1 , the photovoltaic double water tank system also includes an electric heating pipe controller and a second electric heating pipe 203 connected to the mains. The second electric heating tube 203 is installed on the second water tank 200 . The electric heating tube controller is electrically connected with the first electric heating tube 101 to control the start and stop of the first electric heating tube 101 . The electric heating tube controller is electrically connected with the first electric heating tube 101 to control the start and stop of the second electric heating tube 203 . When the solar energy is sufficient, the electric heating pipe controller controls the first electric heating pipe 101 to turn on, so as to use solar energy to heat the water in the first water tank 100, and even indirectly heat the water in the second water tank 200, so as to maximize the use of energy-saving and environmentally friendly solar energy resources. When the water temperature in the first water tank 100 cannot meet the needs of the user and the solar energy is insufficient, the electric heating pipe controller controls the second electric heating pipe 203 to turn on, so that the second electric heating pipe 203 heats the water in the second water tank 200 to provide heat for the user. water. In this way, only when the water temperature in the first water tank 100 is low and the solar energy is insufficient, the above-mentioned photovoltaic double water tank system uses the second electric heating pipe 203 connected to the mains. Therefore, the above-mentioned photovoltaic double water tank system gives priority to the use of solar energy to ensure the rational use of mains power and ensure that users can use hot water in a timely, safe and convenient manner.

Further, as shown in FIG. 1 and FIG. 2 , the photovoltaic double water tank system further includes a water inlet pipe 403 and a water outlet pipe 404 . The first end of the water inlet pipe 403 is used to communicate with the external water pipe, and the second end of the water inlet pipe 403 is connected with the first pipe 401 . The first end of the water outlet pipe 404 is the water end, and the second end of the water outlet pipe 404 is connected with the second pipeline 402 . The water inlet pipe 403 communicates with the water outlet pipe 404 through a first branch pipe 405 . A flow control device 406 is provided at the junction of the first branch pipe 405 and the water outlet pipe 404 . The water inlet pipe 403 communicates with the water outlet pipe 404 through the first branch pipe 405 , so that the cold water in the water inlet pipe 403 is mixed with the hot water in the water outlet pipe 404 . The flow control device 406 is arranged at the junction of the first branch pipe 405 and the water outlet pipe 404, and is used to control the mixing ratio of the cold water in the water inlet pipe 403 and the hot water in the water outlet pipe 404 to meet the user's requirement for water temperature.

Further, as shown in FIG. 1 and FIG. 2 , the photovoltaic double water tank system further includes a general controller, a second temperature sensor 204 , a third temperature sensor 407 and a fourth temperature sensor 408 . The second temperature sensor 204 is used to measure the water temperature of the second water tank 200 . The third temperature sensor 407 is used to measure the water temperature of the water inlet pipe 403 . The fourth temperature sensor 408 is used to measure the water temperature of the second pipeline 402 . The master controller is electrically connected to the electric heating pipe controller, the first temperature sensor 104 , the second temperature sensor 204 , the third temperature sensor 407 , the fourth temperature sensor 408 and the flow control device 406 . The general controller is electrically connected with the first temperature sensor 104 and the second temperature sensor 204 to obtain the water temperature information of the first water tank 100 and the second water tank 200, and then control the electric heating pipe controller to control the first heating pipe and the second water tank. The working state of the heating tube realizes the intelligent complementarity of photovoltaic power and mains power, so as to maximize the use of solar energy, save the use of mains power, and achieve the effect of energy saving and environmental protection.

In addition, the master controller is electrically connected with the third temperature sensor 407 and the fourth temperature sensor 408 in real time, so as to obtain the cold water temperature information of the water inlet pipe 403 and the hot water temperature information of the water outlet pipe 404, and then control the flow control device 406, accurately Control the mixing ratio of the cold water in the water inlet pipe 403 and the hot water in the water outlet pipe 404 to use the outlet water at the water end to maintain a constant temperature.

Further, as shown in FIG. 1 and FIG. 2 , the photovoltaic double water tank system further includes a first switching valve 409 , a second switching valve 410 and a third switching valve 411 . The first switch valve 409 is installed on the water inlet pipe 403 , and the first branch pipe 405 is located between the first end of the water inlet pipe 403 and the first switch valve 409 . The second switch valve 410 is installed on the first pipeline 401 , and the second end of the water inlet pipe 403 is located between the second switch valve 410 and the first water inlet 102 . The middle part of the water inlet pipe 403 communicates with the first pipe 401 through the second branch pipe, and the third on-off valve 411 is installed in the second branch pipe. The master controller is electrically connected to the water pump 300 , the first on-off valve 409 , the second on-off valve 410 and the third on-off valve 411 .

As shown in Figure 3, when the water temperature of the first water tank 100 is greater than or equal to the first preset temperature value, the master controller controls the first switch valve 409 to close, the second switch valve 410 to open and the third switch valve 411 to close, so that the first The first water inlet 102 communicates with the second water inlet 201, the cold water in the second water tank 200 is sent to the first water tank 100, the hot water in the first water tank 100 is sent to the second water tank 200, so that the water in the first water tank 100 Heat exchange is realized with the water in the second water tank 200, and the water in the second water tank 200 is indirectly heated by the photovoltaic panel, thereby improving the utilization rate of solar energy. Wherein, the first preset temperature value can be set manually. For example, the first preset temperature value can be set between 70°C and 90°C.

As shown in Figure 4, when the photovoltaic panel voltage is greater than or equal to the preset voltage value, the solar energy is sufficient at this time, the general controller controls the first heating pipe to be turned on through the heating pipe controller, and the general controller controls the first switching valve 409 to open, The second switch valve 410 is closed and the third switch valve 411 is opened, so that the water in the water inlet pipe 403 flows into the first water tank 100 from the first water inlet 102 , and the hot water in the first water tank 100 flows from the first water outlet 103 to the water outlet pipe 404 , the hot water in the first water tank 100 can be preferentially used to provide hot water for users, and the solar energy can be utilized to the greatest extent. Wherein, the preset voltage value can be manually set. For example, the preset voltage value can be set between 7V and 9V.

As shown in Figure 5, when the sunlight is weak and it is time for water use, the master controller controls the opening of the second heating pipe through the heating pipe controller to heat the water in the second water tank 200 by using commercial power, and at the same time controls the first The switch valve 409 is opened, the second switch valve 410 is opened and the third switch valve 411 is closed, so that the cold water in the water inlet pipe 403 flows into the second water tank 200 from the second water inlet 201, and the hot water in the second water tank 200 flows from the second water outlet 202 flows to the water outlet pipe 404, thereby ensuring the reasonable utilization of the mains electricity and ensuring the timely, safe and convenient use of water for users.

Further, as shown in FIG. 1 , the master controller is provided with an input device for inputting a preset number of people. The master controller judges whether the water temperature of the second water tank 200 satisfies the user's hot water demand according to the number of users, and whether the second heating pipe 203 is needed to heat the water in the second water tank 200, so as to use the mains power reasonably. For example, during the preset water use period and the water temperature of the second water tank 200 is greater than or equal to the third preset temperature value, it is compared whether the water temperature of the second water tank 200 satisfies the temperature condition of the preset number of users. If the water temperature of the second water tank 200 cannot meet the temperature condition of the preset number of users, the second electric heating tube 203 heats the water in the second water tank 200 . The temperature condition for the preset number of users can be set manually. For example, when the number of users is 2, the preset temperature condition for the number of users is that the water temperature in the second water tank 200 is greater than or equal to 60°C. Similarly, when the number of users is 3, the preset temperature condition for the number of users is that the water temperature of the second water tank 200 is greater than or equal to 68°C; when the number of users is 4, the temperature condition for the preset number of users is the water temperature of the second water tank 200 Greater than or equal to 75°C. By default, the number of users is 1, and the preset temperature condition for the number of users is that the water temperature in the second water tank 200 is greater than or equal to 50°C.

Specifically, as shown in FIG. 1 , the capacity of the second water tank 200 is greater than that of the first water tank 100 . The capacity of the first water tank 100 is small, so that the first heating tube can heat the water in the first water tank 100 even when the light is weak, thereby effectively utilizing solar energy. When the light is sufficient, after the first heating pipe heats the water in the first water tank 100, the water pump 300 sends the cold water in the second water tank 200 to the first water tank 100, and the first heating pipe indirectly heats the water in the second water tank 200, Thereby make full use of solar energy.

Specifically, as shown in FIG. 1 , the first water tank 100 is provided with a first sewage outlet 105 , and/or the second water tank 200 is provided with a second sewage outlet 205 . Dirt and sundries in the first water tank 100 are discharged from the first water tank 100 through the first sewage outlet 105 . Therefore, the first sewage outlet 105 facilitates cleaning and maintenance of the first water tank 100 . Similarly, the second sewage outlet 205 is beneficial for cleaning and maintaining the second water tank 200 .

Specifically, as shown in FIG. 1 , the first water tank 100 includes a first shell, a first insulation layer and a first liner, the first liner is arranged in the first shell, and the first heat preservation layer is set on the first shell and the first liner. Between a liner.

And/or, the second water tank 200 includes a second shell, a second heat-insulating layer and a second liner, the second liner is arranged in the second shell, and the second heat-insulating layer is set between the second shell and the second liner .

The first thermal insulation layer can insulate the hot water in the first water tank 100 , thereby avoiding heat loss of the hot water. Similarly, the second thermal insulation layer can prevent the heat loss of the hot water in the second water tank 200 .

As shown in Figure 1 and Figure 6, a control method for the above-mentioned photovoltaic double water tank system includes the following steps:

When the water temperature of the first water tank 100 is greater than or equal to the first preset temperature value, the water in the first water tank 100 and the second water tank 200 are circulated and exchanged until the water temperature of the first water tank 100 is less than or equal to the second preset temperature value. Wherein, the first preset temperature value is greater than the second preset temperature value. The first preset temperature value and the second preset temperature value can be set manually. For example, the first preset temperature value can be set between 70°C and 90°C, and the second preset temperature value can be set between 45°C and 60°C. Specifically, the first preset temperature value is set to 80°C, and the second preset temperature value is set to 50°C.

When the water temperature of the first water tank 100 is lower than the first preset temperature value, the voltage of the photovoltaic panel is compared with the preset voltage value. If the photovoltaic panel voltage is greater than or equal to a preset voltage value, the first electric heating tube 101 heats the water in the first water tank 100 . Wherein, the preset voltage value can be manually set. For example, the preset voltage value is set to 8V.

Compared with the background technology, the control method of the photovoltaic double water tank system of the present utility model has beneficial effects: when the solar energy is sufficient, such as in sunny days in summer, the photovoltaic panels generate more electricity, and the water temperature of the first water tank 100 is greater than or equal to the first predetermined temperature. When the temperature value is set, the water pump 300 runs to deliver the cold water in the second water tank 200 to the first water tank 100 through the first pipe 401 until the water temperature in the first water tank 100 is less than or equal to the second preset temperature value, so that the first water tank 100 The water in the second water tank 200 is continuously heated, and then the cold water in the second water tank 200 is circulated and heated. When the water temperature in the first water tank 100 is less than or equal to the second preset temperature value, the water pump 300 stops running, and the first heating pipe continues to heat the water in the first water tank 100 until the water temperature in the first water tank 100 is greater than or equal to the first preset temperature value. In this way, when the solar energy is sufficient, the photovoltaic panel can heat the water in the first water tank 100 and the water in the second water tank 200 through the first heating pipe, thereby improving the utilization rate of solar energy. When the water temperature in the first water tank 100 is lower than the first preset temperature value, if the voltage of the photovoltaic panel is greater than or equal to the preset voltage value, it indicates that the solar energy is sufficient, and the first electric heating tube 101 heats the water in the first water tank 100, which can satisfy the user's water consumption requirements. Requirements, so that the solar energy can continue to be used and the utilization rate of the solar energy can be improved.

Further, as shown in Figure 1 and Figure 6, the control method of the photovoltaic double water tank system also includes the following steps:

When the temperature of the water in the first water tank 100 is lower than the first preset temperature value and the voltage of the photovoltaic panel is lower than the preset voltage value, it is judged whether it belongs to the preset water use period. Wherein, the preset water use period can be set manually. For example, the preset water use time period is set to 17:00-21:00 time period.

If this time belongs to the preset water use period and the water temperature in the second water tank 200 is lower than the third preset temperature value, then the second electric heating tube 203 heats the water in the second water tank 200 . Wherein, the third preset temperature value can be set manually. For example, the third preset temperature value is set to 50°C.

If it belongs to the preset water consumption time period and the water temperature of the second water tank 200 is greater than or equal to the third preset temperature value, it is compared whether the water temperature of the second water tank 200 satisfies the temperature condition of the preset number of users. If the water temperature of the second water tank 200 cannot meet the temperature condition of the preset number of users, the second electric heating tube 203 heats the water in the second water tank 200 . The temperature condition for the preset number of users can be set manually. For example, when the number of users is 2, the preset temperature condition for the number of users is that the water temperature in the second water tank 200 is greater than or equal to 60°C. Similarly, when the number of users is 3, the preset temperature condition for the number of users is that the water temperature of the second water tank 200 is greater than or equal to 68°C; when the number of users is 4, the temperature condition for the preset number of users is the water temperature of the second water tank 200 Greater than or equal to 75°C. By default, the number of users is 1, and the preset temperature condition for the number of users is that the water temperature in the second water tank 200 is greater than or equal to 50°C.

In the control method of the above-mentioned photovoltaic dual water tank system, under the premise that the water temperature of the first water tank 100 is insufficient and the solar energy is insufficient, during the water use period, when the water temperature of the second water tank 200 is lower than the third preset temperature value, the second electric heating tube 203 When turned on, the water in the second water tank 200 is heated to meet the hot water demand of the user. When the water temperature of the second water tank 200 is greater than or equal to the third preset temperature value, it is further judged whether the water temperature of the second water tank 200 meets the temperature condition of the preset number of users, if not, the second electric heating tube 203 is opened in time to heat the first The water in the second water tank 200 is to meet the hot water demand of users. To sum up, the control method of the above-mentioned photovoltaic double water tank system is to use solar energy first through continuous judgment and analysis.

Further, as shown in Figure 1, the control method of the photovoltaic double water tank system also includes the following steps:

The flow control device 406 is turned on, and the master controller controls the mixing ratio of the water in the first branch pipe 405 and the water in the outlet pipe 404 according to the water temperature measured by the third temperature sensor 407 and the water temperature measured by the fourth temperature sensor 408 .

As shown in Figure 4, the flow control device 406 is opened, and when the water temperature of the first water tank 100 is greater than the fourth preset water temperature value, the master controller controls the opening of the first switching valve 409, the closing of the second switching valve 410 and the closing of the third switching valve 411 open. Wherein, the fourth preset water temperature value can be set manually. For example, the fourth preset water temperature value is set to 40°C.

As shown in Figure 5, the flow control device 406 is turned on, and when the water temperature of the first water tank 100 is less than or equal to the fourth preset water temperature value, the master controller controls the opening of the first switch valve 409, the opening of the second switch valve 410 and the opening of the third switch valve. Valve 411 is closed.

In the control method of the above-mentioned photovoltaic double water tank system, the general controller is electrically connected with the third temperature sensor 407 and the fourth temperature sensor 408, so that the cold water temperature information of the water inlet pipe 403 and the hot water temperature information of the water outlet pipe 404 can be obtained, and then The flow control device 406 is controlled to accurately control the mixing ratio of the cold water in the water inlet pipe 403 and the hot water in the water outlet pipe 404, so as to use the outlet water at the water end to maintain a constant temperature and improve user experience. When the water temperature of the first water tank 100 is greater than the fourth preset water temperature value, it indicates that the hot water in the first water tank 100 is sufficient. Therefore, the master controller controls the opening of the first on-off valve 409, the closing of the second on-off valve 410 and the closing of the third on-off valve. 411 is opened, so that the water in the water inlet pipe 403 flows into the first water tank 100 from the first water inlet 102, and the hot water in the first water tank 100 flows from the first water outlet 103 to the water outlet pipe 404, and the hot water in the first water tank 100 can be used preferentially Provide users with hot water and maximize the use of solar energy. When the water temperature of the first water tank 100 is less than or equal to the fourth preset water temperature value, it indicates that the hot water in the first water tank 100 is insufficient, and the master controller controls the opening of the second heating tube through the heating pipe controller, and utilizes commercial power to control the heating of the second water tank 200. The water is heated, and the first switch valve 409 is controlled to open, the second switch valve 410 is opened, and the third switch valve 411 is closed, so that the cold water in the water inlet pipe 403 flows into the second water tank 200 from the second water inlet 201, and the water in the second water tank 200 The hot water flows from the second water outlet 202 to the water outlet pipe 404, thereby ensuring the rational utilization of mains power and ensuring timely, safe and convenient water use for users.

The various technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be interpreted as a limitation on the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (9)

1. a kind of photovoltaic double-water-tank system, including the first water tank (100) and the first electrothermal tube (101), first electrothermal tube (101) it is used to be electrically connected with photovoltaic panel, first electrothermal tube (101) is installed on first water tank (100), and described first Water tank (100) is provided with the first water inlet (102) and the first delivery port (103), it is characterised in that also including the first temperature sensor (104), the second water tank (200) and water pump (300), first temperature sensor (104) are used to measure first water tank (100) water temperature, second water tank (200) are provided with the second water inlet (201) and the second delivery port (202), and described first enters The mouth of a river (102) is connected by the first pipeline (401) with second water inlet (201), and first delivery port (103) passes through Two pipelines (402) connect with second delivery port (202), the water pump (300) be arranged at first pipeline (401) and/ Or the second pipe (402).

2. photovoltaic double-water-tank system according to claim 1, it is characterised in that also including electric heating tube controller and and civil power The second electrothermal tube (203) of connection, second electrothermal tube (203) are installed on second water tank (200), the electric heating management and control Device processed and first electrothermal tube (101) be electrically connected with, to control the start and stop of first electrothermal tube (101), the electrothermal tube Controller and first electrothermal tube (101) be electrically connected with, to control the start and stop of second electrothermal tube (203).

3. photovoltaic double-water-tank system according to claim 2, it is characterised in that also including water inlet pipe (403) and outlet pipe (404), the first end of the water inlet pipe (403) is used to connect with outer water tube, the second end and first of the water inlet pipe (403) Pipeline (401) connects, and the first end of the outlet pipe (404) is the second end of the outlet pipe (404) and described the with water end (W.E.) Two pipelines (402) are connected, and the water inlet pipe (403) connected by the first branch pipe (405) with the outlet pipe (404), and described the The junction of one branch pipe (405) and the outlet pipe (404) is provided with volume control device (406).

4. photovoltaic double-water-tank system according to claim 3, it is characterised in that also passed including master controller, second temperature Sensor (204), three-temperature sensor (407) and the 4th temperature sensor (408), the second temperature sensor (204) are used In the water temperature for measuring second water tank (200), the three-temperature sensor (407) is used to measure the water inlet pipe (403) Water temperature, the 4th temperature sensor (408) is used to measure the water temperatures of the second pipe (402), the master controller point Not with the electric heating tube controller, first temperature sensor (104), the second temperature sensor (204), the described 3rd Temperature sensor (407), the 4th temperature sensor (408) and the volume control device (406) are electrically connected with.

5. photovoltaic double-water-tank system according to claim 4, it is characterised in that also including first switch valve (409), second Switch valve (410) and the 3rd switch valve (411), the first switch valve (409) are installed on the water inlet pipe (403) and described First branch pipe (405) is between the water inlet pipe (403) first end and the first switch valve (409)；The second switch Valve (410) is installed on first pipeline (401) and the end of the water inlet pipe (403) second is located at the second switch valve (410) Between first water inlet (102)；The middle part of the water inlet pipe (403) passes through the second branch pipe and first pipeline (401) connect, the 3rd switch valve (411) is installed on second branch pipe；The master controller respectively with the water pump (300), the first switch valve (409), the second switch valve (410) and the 3rd switch valve (411) are electrically connected with.

6. photovoltaic double-water-tank system according to claim 4, it is characterised in that the master controller is provided with pre- for inputting If the input unit of number.

7. photovoltaic double-water-tank system according to claim 1, it is characterised in that the capacity of second water tank (200) is big In the capacity of first water tank (100).

8. photovoltaic double-water-tank system according to claim 1, it is characterised in that first water tank (100) is provided with first Sewage draining exit (105), and/or, second water tank (200) is provided with the second sewage draining exit (205).

9. the photovoltaic double-water-tank system according to claim 1 to 8 any one, it is characterised in that first water tank (100) the first shell, the first heat-insulation layer and the first inner bag are included, first inner bag is arranged in first shell, described First heat-insulation layer is arranged between first shell and first inner bag；

And/or second water tank (200) includes second housing, the second heat-insulation layer and the second inner bag, second inner bag is set In in the second housing, second heat-insulation layer is arranged between the second housing and second inner bag.