A composite sanitary hot water system

Abstract

The present invention provides a composite sanitary hot water system, which includes a solar collector, a hot water collecting tank, a hot water storage tank and a constant temperature water tank. The solar collector is connected to the hot water collecting tank through a first pipeline and a second pipeline to form a closed loop. A solar circulating water pump is provided on the second pipeline. The hot water collecting tank is connected to the hot water storage tank through a third pipeline. A fourth pipeline connected to the constant temperature water tank is connected in parallel on the third pipeline. The constant temperature water tank is connected to a heat pump through a fifth pipeline provided with a screw machine circulating water pump. The hot water storage tank is connected to the heat pump through a sixth pipeline. The hot water storage tank and the constant temperature water tank are communicated through a communicating pipeline. The present invention can reduce the load-bearing pressure of the house, reduce the noise pollution to high-rise residents, meet the hot water demand of residents, reduce energy waste, avoid the influence of water stratification on water temperature through the design method of continuous supply of high-level heat energy, and ensure the continuous supply of high-quality hot water source.

Description

Technical Field

[0001] The present invention relates to a composite sanitary hot water system, belonging to the technical field of new hot water systems. Background Art

[0002] A water collection tank is a device used to temporarily store the circulating water in various water systems, which can conveniently increase the water storage volume required during the intermittent operation of the system, enabling the cooling water circulation pump to work stably. The requirements for selecting a water tank in a water system are very strict. For example, the water tank occupies a large area, affecting the building load-bearing capacity, and the noise also affects the residents on high floors. There are also high requirements for the pressure resistance of the water tank. Excessive pressure will cause the water tank to deform, and it is not convenient for excessive maintenance. The hot water tank will also have a stratification phenomenon due to the change of water temperature, resulting in uneven water tank temperature and affecting the user experience. At the same time, on rainy and cloudy days, it will affect the water temperature and cannot ensure the continuous output of comfortable constant-temperature hot water. Summary of the Invention

[0003] In order to solve the above-mentioned deficiencies of the prior art, the present invention proposes a composite sanitary hot water system, and the specific technical solutions are as follows:

[0004] A composite sanitary hot water system includes a solar collector, a hot water collection tank, a hot water storage tank, and a constant temperature water tank. The solar collector and the hot water collection tank are connected through a first pipeline and a second pipeline to form a closed loop. A solar circulation water pump is provided on the second pipeline. The hot water collection tank and the hot water storage tank are connected through a third pipeline. A fourth pipeline connected to the constant temperature water tank is connected in parallel on the third pipeline. The constant temperature water tank and the heat pump are connected through a fifth pipeline provided with a screw machine circulation water pump. The hot water storage tank and the heat pump are connected through a sixth pipeline. The hot water storage tank and the constant temperature water tank are communicated through a communication pipeline.

[0005] Preferably, a first temperature probe for monitoring the water temperature at the outlet of the solar collector is provided on the first pipeline near the outlet of the solar collector; second temperature probes for monitoring the water temperature are respectively provided in the hot water collection tank, the hot water storage tank, and the constant temperature water tank; a fifth temperature probe for monitoring the water temperature at the outlet of the hot water storage tank is provided at the outlet of the hot water storage tank.

[0006] Further, a first valve is provided on the pipeline between the connection of the fourth pipeline and the third pipeline and the hot water storage tank, and a second valve is provided on the fourth pipeline.

[0007] Further, a first liquid level gauge is provided on the hot water collection tank, and second liquid level gauges are provided on both the hot water storage tank and the constant temperature water tank.

[0008] Preferably, the installation position of the hot water collecting tank is higher than that of the constant temperature water tank and the hot water storage tank, and the installation positions of the constant temperature water tank and the hot water storage tank are on the same plane.

[0009] Preferably, water supply pipelines are provided on both the hot water collecting tank and the constant temperature water tank, and backflow preventers are provided on the water supply pipelines.

[0010] Further, the first temperature probe, the second temperature probe, the third temperature probe, the fourth temperature probe, the fifth temperature probe, the first liquid level gauge and the second liquid level gauge are electrically connected to the PLC controller respectively, and the PLC controller is electrically connected to the PLC control panel; the solar circulating water pump, the heat pump, the first valve and the second valve are all electrically connected to the PLC controller.

[0011] Further, the first valve and the second valve are solenoid valves.

[0012] The present invention can reduce the load-bearing pressure of the house, reduce the noise pollution to high-rise residents while meeting the hot water demand of the residents, avoid the influence of rainy weather on the water temperature by connecting the solar heat collection to the heat pump system, reduce the waste of energy, and then avoid the influence of water stratification on the water temperature through the continuous supply design of high-level heat energy, ensuring a continuous supply of high-quality hot water source. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of a composite sanitary hot water system of the present invention.

[0014] In the figure: 1, solar collector; 2, hot water collecting tank; 3, hot water storage tank; 4, constant temperature water tank; 5, first pipeline; 6, second pipeline; 7, solar circulating water pump; 8, third pipeline; 9, fourth pipeline; 10, heat pump; 11, screw machine circulating water pump; 12, fifth pipeline; 13, sixth pipeline; 14, connecting pipeline; 15, first temperature probe; 16, second temperature probe; 17, third temperature probe; 18, fourth temperature probe; 19, fifth temperature probe; 20, first valve; 21, second valve; 22, first liquid level gauge; 23, second liquid level gauge; 24, water supply pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] Such as Figure 1As shown in the figure, a composite sanitary hot water system includes a solar collector 1, a hot water collecting tank 2, a hot water storage tank 3, and a constant temperature water tank 4. The solar collector 1 and the hot water collecting tank 2 are connected through a first pipeline 5 and a second pipeline 6 to form a closed loop. A solar circulating water pump 7 is provided on the second pipeline 6. The hot water collecting tank 2 and the hot water storage tank 3 are connected through a third pipeline 8. A fourth pipeline 9 connected to the constant temperature water tank 4 is connected in parallel on the third pipeline 8. The constant temperature water tank 9 and the heat pump 10 are connected through a fifth pipeline 12 provided with a screw machine circulating water pump 11. The hot water storage tank 3 and the heat pump 10 are connected through a sixth pipeline 13. The hot water storage tank 3 and the constant temperature water tank 4 are communicated through a communicating pipeline 14. The constant temperature water tank 3 is used to ensure that users have a continuous supply of high-quality hot water sources.

[0017] A first temperature probe 15 for monitoring the water temperature at the outlet of the solar collector 1 is provided on the first pipeline 5 near the outlet of the solar collector 1; second temperature probes 16, third temperature probes 17, and fourth temperature probes 18 for monitoring the water temperature are respectively provided in the hot water collecting tank 2, the hot water storage tank 3, and the constant temperature water tank 4; a fifth temperature probe 19 for monitoring the water temperature at the outlet of the hot water storage tank 3 is provided at the outlet of the hot water storage tank 3.

[0018] A first valve 20 is provided on the pipeline between the connection of the fourth pipeline 9 and the third pipeline 8 and the hot water storage tank 3. A second valve 21 is provided on the fourth pipeline 9. The first valve 20 and the second valve 21 are solenoid valves. A first liquid level gauge 22 is provided on the hot water collecting tank 2, and second liquid level gauges 23 are provided on both the hot water storage tank 3 and the constant temperature water tank 4.

[0019] The installation position of the hot water collecting tank 2 is higher than that of the hot water storage tank 3 and the constant temperature water tank 4. The installation positions of the hot water storage tank 3 and the constant temperature water tank 4 are on the same plane. To solve the influence of the excessive weight of the water tank on the load-bearing of the house, a system design of multi-tank collection and storage water storage method and diversified configuration of the water tank volume is adopted. The water tank volume is calculated through the water consumption. The water collection method of three water tanks is that a small water tank is placed on the roof as the hot water collecting tank 2 of the solar hot water system, and the constant temperature water tank 4 and the hot water storage tank 3 are placed on the ground, which reduces the load-bearing pressure and solves the noise pollution of high-rise residents at the same time.

[0020] Make-up water pipelines 24 are provided on both the hot water collecting tank 2 and the constant temperature water tank 4, and backflow preventers are provided on the make-up water pipelines 24.

[0021] The first temperature probe 15, the second temperature probe 16, the third temperature probe 17, the fourth temperature probe 18, the fifth temperature probe 19, the first level gauge 22 and the second level gauge 23 are respectively electrically connected to the PLC controller, and the PLC controller is electrically connected to the PLC control panel. The PLC control panel can display that the temperature values corresponding to the first temperature probe 15, the second temperature probe 16, the third temperature probe 17, the fourth temperature probe 18, and the fifth temperature probe 19 are T1, T2, T3, T4, and T5 respectively; and display the liquid level heights H1 and H2 corresponding to the first level gauge 22 and the second level gauge 23. The solar circulating water pump 7, the heat pump 10, the first valve 20 and the second valve 21 are all electrically connected to the PLC controller.

[0022] The working principle of the present invention is as follows:

[0023] On sunny days:

[0024] When the device is running, the solar collector 1 absorbs heat. When (T2 - T1) ≥ 4°C, the PLC controller controls the solar circulating water pump 7 to start, and continuously heats the water in the hot water collecting tank 2. When the water temperature (T2 - T1) ≤ 4°C, the PLC controller controls the solar circulating water pump 7 to stop. When T2 = 55 ± 2°C, the PLC controller controls the first valve 20 to open, and the water flows into the hot water storage tank 2. When T2 ≤ 53°C, the PLC controller controls the first valve 21 to close. When T5 < 50°C, the PLC controller controls the screw conveyor circulating water pump 11 to start, pumps the water in the constant temperature water tank 4 into the air source heat pump 10 for heating, and the heated water is pumped into the hot water storage tank 3. When T4 = 55 ± 2°C, the heat pump 10 stops.

[0025] On cloudy or cold days:

[0026] When the device is running, the solar collector 1 absorbs heat. When (T2 - T1) ≥ 4°C, the PLC controller controls the solar circulating water pump 7 to start, and continuously heats the water in the hot water collecting tank 2. When the water temperature (T2 - T1) ≤ 4°C, the PLC controller controls the solar circulating water pump 7 to stop. When the water temperature (T3 - T2) ≤ 10°C, the second valve 21 opens, and the water in the hot water collecting tank 2 flows into the constant temperature water tank 4. When (T2 - T1) ≥ 4°C or (T3 - T2) ≤ 10°C, the second valve 21 closes. When T5 < 50°C, the PLC controller controls the screw conveyor circulating water pump 11 to start, pumps the water in the constant temperature water tank 4 into the air source heat pump 10 for heating, and the heated water is pumped into the hot water storage tank 3. When T4 = 55 ± 2°C, the heat pump stops. The air source heat pump 10 can be replaced by a water source heat pump or a seawater source heat pump.

[0027] In sunny, cloudy or cold weather, whether the liquid level of the heat storage tank 3 and the thermostatic water tank 4 drops due to the user's use of hot water, or the first valve 20 or the second valve 21 is opened to cause the liquid level of the heat collection tank 2 to drop, when the liquid level heights H1 and H2 are less than the preset liquid level heights, the PLC controller controls the opening of the water supply pipeline 24 valve to supply water to the heat collection tank 2 or the thermostatic water tank 4, ensuring that the heat collection tank 2 and the thermostatic water tank 4 are always at the preset liquid level height state and maintaining sufficient water consumption. The temperature difference formed after water replenishment is also heated by the above-mentioned temperature control principle to ensure temperature stability, and when the preset height is reached, water replenishment is stopped. When the first valve 20 or the second valve 21 is opened, when the liquid level height H2 of the heat storage tank 3 and the thermostatic water tank 4 reaches the preset height, the PLC controller also controls the first valve 20 or the second valve 21 to close to prevent overflow.

[0028] In order to solve the influence of hot water stratification in the water tank on the hot water temperature, the present invention combines the heat pump 10 with the solar collector 1 and collects and stores water in multiple water tanks. During operation, the water in the hot water storage tank 3 is firstly ensured to be in a high temperature state. The two water tanks are interconnected, and the high-temperature hot water squeezes the low-temperature hot water into the constant temperature water tank 4. The low-temperature hot water is secondary heated by the heat pump 10. When the set temperature is reached, the system stops, and the temperature quality of the water outlet of the hot water storage tank 3 is always guaranteed. It is ensured that there is sufficient hot water and the water temperature meets the requirements, thereby solving the problem of residents' water being hot and cold.

[0029] Since solar energy is a renewable resource, the country advocates green environmental protection and energy saving, and the use of solar collectors 1 is very large. However, due to the great influence of the environment, it is difficult to reach the set temperature in rainy weather. The ordinary hot water system adds a heating wire and uses the most electric heating method to heat the water to the set temperature, which consumes a lot of electricity. In order to solve the above problem, the heat collection tank 3 is connected to the constant temperature water tank 4, and the water is heated twice by the heat pump 10, and finally reaches the hot water storage tank 3, which greatly reduces the consumption of electricity.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite sanitary hot water system, characterized in that: it includes a solar collector (1), a hot water collecting tank (2), a hot water storage tank (3) and a constant temperature water tank (4). The solar collector (1) is connected to the hot water collecting tank (2) through a first pipeline (5) and a second pipeline (6) to form a closed loop. A solar circulating water pump (7) is provided on the second pipeline (6). The hot water collecting tank (2) is connected to the hot water storage tank (3) through a third pipeline (8). A fourth pipeline (9) connected to the constant temperature water tank (4) is connected in parallel on the third pipeline (8). The constant temperature water tank (4) is connected to a heat pump (10) through a fifth pipeline (12) provided with a screw machine circulating water pump (11). The hot water storage tank (3) is connected to the heat pump (10) through a sixth pipeline (13). The hot water storage tank (3) is communicated with the constant temperature water tank (4) through a communicating pipeline (14); a first temperature probe (15) for monitoring the water temperature at the outlet of the solar collector (1) is provided on the first pipeline (5) near the outlet of the solar collector (1); second temperature probes (16), third temperature probes (17) and fourth temperature probes (18) for monitoring the water temperature are respectively provided in the hot water collecting tank (2), the hot water storage tank (3) and the constant temperature water tank (4); a fifth temperature probe (19) for monitoring the water temperature at the outlet of the hot water storage tank (3) is provided at the outlet of the hot water storage tank (3); a first valve (20) is provided on the pipeline between the connection of the fourth pipeline (9) and the third pipeline (8) and the hot water storage tank (3), and a second valve (21) is provided on the fourth pipeline (9); the installation position of the hot water collecting tank (2) is higher than that of the hot water storage tank (3) and the constant temperature water tank (4), and the installation positions of the hot water storage tank (3) and the constant temperature water tank (4) are on the same plane.

2. A composite sanitary hot water system according to claim 1, characterized in that: a first liquid level gauge (22) is provided on the hot water collecting tank (2), and second liquid level gauges (23) are provided on both the hot water storage tank (3) and the constant temperature water tank (4).

3. A composite sanitary hot water system according to claim 1, characterized in that: make-up water pipelines (24) are provided on both the hot water collecting tank (2) and the constant temperature water tank (4), and backflow preventers are provided on the make-up water pipelines (24).

4. A composite sanitary hot water system according to claim 2, characterized in that: the first temperature probe (15), the second temperature probe (16), the third temperature probe (17), the fourth temperature probe (18), the fifth temperature probe (19), the first liquid level gauge (22) and the second liquid level gauge (23) are respectively electrically connected to a PLC controller, and the PLC controller is electrically connected to a PLC control panel; the solar circulating water pump (7), the heat pump (10), the first valve (20) and the second valve (21) are all electrically connected to the PLC controller.

5. A composite sanitary hot water system according to claim 4, characterized in that: the first valve (20) and the second valve (21) are solenoid valves.

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