Flat plate solar energy and air source heat pump coupled hot water heating system

Abstract

The utility model relates to a flat-plate solar energy and air source heat pump coupled hot water heating system which comprises an air source heat pump, a flat-plate heat collection module, a heating water tank and a floor heating module, seamless switching of a solar energy heat supply mode and an air energy heat supply mode is achieved through selective opening or closing of four stop valves, the heat supply and water supply efficiency is high, energy is saved, and the energy consumption is reduced. And using the experience number. The flat plate heat collection module comprises a plurality of heat collection headers arranged in parallel, the number of the heat collection headers is increased or decreased according to actual requirements, and the heating capacity of different systems is met. When the air heat source pump supplies heat to the floor heating system, heat can be supplied to the floor heating system or a hot water user terminal in time when the weather is bad, and the heat supply requirement of the user terminal is met. Under the condition that solar irradiation is sufficient, solar energy is effectively utilized to supply heat to floor heating or hot water user terminals, and the power source and the use cost are saved to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of solar energy and air source heat pump coupled energy supply, in particular to a flat-plate solar energy and air source heat pump coupled hot water heating system. Background Art

[0002] At present, solar flat-plate collector modules can solve the problem of hot water in all seasons and heating in winter, but they are volatile and limited; they rely on solar energy for heating, so they cannot effectively heat in rainy weather or at night, and the heating effect will be limited by weather conditions. And heat storage equipment needs to be installed to store the heat energy collected during the day for use at night or on rainy days. Heat storage equipment increases the complexity and cost of the system and takes up a certain amount of space. When the weather changes and the weather is continuous and rainy, the solar heating system usually needs a backup traditional heating system as a supplement, which increases the initial investment and operating costs.

[0003] Air source heat pumps can solve the problems of hot water replenishment in all seasons, heating in winter and cooling in summer, but they consume electricity, cost money, and are easily affected by seasonality. Their performance is greatly affected by external temperature. In extremely low or high temperature conditions, their efficiency and performance may decrease. Especially in cold winters, air source heat pumps need to consume more energy to provide hot water or heating, and the effect may not be as good as other types of heat pumps such as ground source heat pumps. Under extreme temperature conditions, the energy efficiency ratio of air source heat pumps may decrease, resulting in increased energy consumption, which in turn affects the cost of use.

[0004] In summary, the use of solar flat-plate collector modules and air source heat pumps alone cannot effectively solve the needs of four-stage hot water replenishment and floor heating. Moreover, in the process of using terminal tap water for heat exchange, the water stays in the heat exchange coil for too long, which is easy to breed bacteria. Summary of the invention

[0005] The purpose of the utility model is to provide a flat-plate solar energy and air source heat pump coupled hot water heating system to solve the problems raised in the above-mentioned background technology. The utility model has the advantages of realizing seamless switching of solar energy and air energy heating modes by selectively opening or closing each stop valve, thereby meeting the heating and water supply needs of the user terminal within 24 hours a day.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flat-plate solar energy and air source heat pump coupled hot water heating system, comprising an air source heat pump, a flat-plate heat collection module, a heating water tank and a floor heating module, a heat collection outlet pipe is provided between the flat-plate heat collection module and the heating water tank, an air energy outlet pipe and an air energy return pipe are provided between the air source heat pump and the heating water tank, a first four-way pipe is provided on the air energy outlet pipe, the first four-way pipe is connected to the floor heating module through a floor heating water inlet pipe, and an expansion tank is also connected to the first four-way pipe;

[0007] The fourth stop valve, heat pump circulation pump and the first stop valve are arranged in sequence on the air energy return pipe along the return direction, a second four-way pipe is arranged between the fourth stop valve and the heat pump circulation pump, the second four-way pipe is connected to the flat plate heat collection module through the heat collection return pipe, a solar energy circulation pump and the third stop valve are arranged in sequence on the heat collection return pipe along the return direction, the second four-way pipe is connected to each floor heating module through the floor heating return pipe, and a second stop valve is arranged on the floor heating return pipe. Through the selective opening or closing of each stop valve, the seamless switching of solar energy and air energy heating modes is realized, the heating and water supply efficiency is high, energy is saved, and the user experience number is used.

[0008] As a further solution of the utility model, a heat exchange water pipe is provided in the heating water tank, the heat exchange water pipe includes a water inlet and a water outlet, the water inlet is connected to the tap water pipe, and the water outlet is connected to the user terminal, and an exhaust port is also provided on the heating water tank, and a first exhaust valve is provided on the exhaust port. The medium in the heating water tank and the medium in the heat exchange water pipe operate independently, complete the heat exchange without interfering with each other, and have high heat exchange efficiency.

[0009] As a further solution of the utility model, the flat-plate heat collection module includes a plurality of heat collection headers arranged in parallel, each heat collection header is connected to a heat collection outlet pipe and a heat collection return pipe, and a second exhaust valve is arranged in parallel on the heat collection outlet pipe. The number of heat collection headers can be increased or decreased according to actual needs to meet the heating capacity of different systems.

[0010] As a further solution of the utility model, the floor heating module includes a manifold connected to the floor heating water inlet pipe, the manifold is provided with a plurality of water outlets, and each water outlet is connected to a floor heating coil.

[0011] As a further solution of the utility model, it includes air energy floor heating mode, air energy hot water mode, solar energy floor heating mode, solar energy hot water mode;

[0012] Air source floor heating mode: close the third stop valve and the fourth stop valve, open the first stop valve and the second stop valve, start the air source heat pump, heat the medium in the system, the medium enters the floor heating water inlet pipe along the air source outlet pipe and the first four-way pipe, and then flows to each floor heating coil through the manifold, and then flows back to the air source heat pump along the floor heating return pipe through the second four-way pipe and the air source return pipe for recirculation. The air heat source pump provides heat for the floor heating. When the weather is bad, it can provide heat for the floor heating in time to meet the heating needs of the user terminal.

[0013] As a further solution of the utility model, the air-to-water heating mode: close the second stop valve and the third stop valve, open the first stop valve and the fourth stop valve, start the air source heat pump, heat the medium in the system, the medium enters the heating water tank along the air energy outlet pipe, exchanges heat with the heat exchange coil in the heating water tank, and the medium in the heating water tank flows back to the air source heat pump along the air energy return pipe to circulate again. To provide hot water, when the weather is bad, the air heat source pump can provide hot water to the user terminal in time to meet the hot water supply demand of the user terminal.

[0014] As a further solution of the utility model, the solar floor heating mode: close the first stop valve and the fourth stop valve, open the second stop valve and the third stop valve, the medium in the flat plate heat collection module heat collection heating system, the medium enters the heating water tank along the heat collection outlet pipe, the tap water in the heat exchange water pipe is heated and flows to the use terminal along the outlet, the medium in the heating water tank enters the floor heating water inlet pipe along the air energy outlet pipe and the first four-way pipe, and then flows to each floor heating coil through the manifold, and then flows back to the flat plate heat collection module along the floor heating return pipe through the second four-way pipe and the heat collection return pipe for recirculation. Effectively utilize solar energy to provide heat for floor heating, greatly saving power and use costs.

[0015] As a further solution of the utility model, the solar water heating mode: close the first stop valve and the second stop valve, open the third stop valve and the fourth stop valve, the medium in the flat plate heat collection module heats the medium in the heating system, the medium enters the heating water tank along the heat collection outlet pipe, the tap water in the heat exchange water pipe is heated and flows to the user terminal along the outlet, and the medium in the heating water tank flows back to the flat plate heat collection module along the fourth stop valve and the third stop valve on the heat collection return pipe to circulate again. Effectively utilize solar energy to heat the user terminal, greatly saving power and usage costs.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1) By selectively opening or closing the first stop valve, the second stop valve, the third stop valve and the fourth stop valve, seamless switching between solar energy and air energy heating modes can be achieved, that is, the conversion between air energy floor heating mode, air energy hot water mode, solar energy floor heating mode and solar energy hot water mode can be systematically realized, so that in actual use, the heating and water supply efficiency is high, energy is saved, and the user experience is good.

[0018] 2) The medium in the heating water tank and the medium in the water exchange pipe operate independently, completing the heat exchange without interfering with each other, reaching the use temperature for terminal use, the medium has more heat exchange contact with the heat exchange coil, and the medium flows faster in the heat exchange coil, which makes the heating temperature rise quickly, so the heat exchange efficiency is high.

[0019] 3) The flat-plate solar collector module includes a plurality of solar collector headers arranged in parallel. The number of solar collector headers can be increased or decreased according to actual needs to meet the heating capacity of different systems.

[0020] 4) The air heat source pump provides heat for floor heating. When the weather is bad, the floor heating coil is controlled by adjusting the manifold. The heat medium dissipates heat while flowing through the floor heating coil, and can provide heat to the floor heating or hot water user terminal in time to meet the heating needs of the user terminal.

[0021] 5) When there is sufficient solar radiation, solar energy is effectively utilized and flat-plate collector modules are used for heating. The medium with higher temperature continuously circulates in the heating water tank and exchanges heat with the tap water in the heat exchange coil to provide heat to the floor heating or hot water user terminals, saving power and usage costs to a great extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the system principle diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the air-energy floor heating mode of the utility model;

[0024] Figure 3 This is a schematic diagram of the air-to-water heating mode of the utility model;

[0025] Figure 4 This is a schematic diagram of the solar floor heating mode of the utility model;

[0026] Figure 5 This is a schematic diagram of the solar water heating mode of the utility model.

[0027] In the figure: 1-air source heat pump, 101-air energy outlet pipe, 102-air energy return pipe, 2-first stop valve, 3-heat pump circulation pump, 4-first four-way pipe, 5-expansion tank, 6-solar circulation pump, 7-floor heating module, 8-flat plate collector module, 801-collector outlet pipe, 802-collector return pipe, 803-second exhaust valve, 9-heating water tank, 901-heat exchange water pipe, 902-first exhaust valve, 10-third stop valve, 11-manifold, 12-second stop valve, 13-second four-way pipe, 14-fourth stop valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Please refer to the attached Figure 1 A flat-plate solar energy and air source heat pump coupled hot water heating system, comprising an air source heat pump 1, a flat-plate heat collection module 8, a heating water tank 9 and a floor heating module 7, a heat collection outlet pipe 801 is provided between the flat-plate heat collection module and the heating water tank, an air energy outlet pipe and an air energy return pipe 102 are provided between the air source heat pump and the heating water tank, a hot water exchange pipe 901 is provided in the heating water tank, the hot water exchange pipe comprises a water inlet and a water outlet, the water inlet is connected to the tap water pipe, the water outlet is connected to the user terminal, an exhaust port is also provided on the heating water tank, and a first exhaust valve 902 is provided on the exhaust port. In the case where the heating water tank generates excess gas during the heat exchange process, the first exhaust valve is opened to exhaust. In the case where the heating water tank generates excess gas during the heat exchange process, the first exhaust valve is opened to exhaust to avoid excessive internal gas pressure.

[0030] The air energy outlet pipe is provided with a first four-way pipe 4, which is connected to the floor heating module through the floor heating water inlet pipe, and the first four-way pipe is also connected to an expansion tank 5;

[0031] A fourth stop valve 14, a heat pump circulation pump 3 and a first stop valve 2 are sequentially provided on the air energy return pipe along the return direction of liquid, a second four-way pipe 13 is provided between the fourth stop valve and the heat pump circulation pump, the second four-way pipe is connected to the flat-plate solar collector module through the heat collection return pipe 802, and a solar circulation pump 6 and a third stop valve 10 are sequentially provided on the heat collection return pipe along the return direction, the flat-plate solar collector module includes a plurality of solar collector headers arranged in parallel, each of which is connected to the solar collector outlet pipe and the solar collector return pipe, and a second exhaust valve 803 is provided in parallel on the solar collector outlet pipe.

[0032] The second four-way pipe 13 is connected to each floor heating module through the floor heating return pipe 701. The floor heating module includes a manifold 11 connected to the floor heating inlet pipe. The manifold is provided with a plurality of water outlets, each of which is connected to a floor heating coil. A second stop valve 12 is provided on the floor heating return pipe.

[0033] By selectively opening and closing the first stop valve 2, the second stop valve 2, the third stop valve 10 and the fourth stop valve 14, the system can switch between air-source floor heating mode, air-source hot water mode, solar floor heating mode and solar hot water mode, and realize the separate use of solar flat-plate collector modules and air source heat pumps to meet the needs of four-stage hot water supplement and floor heating.

[0034] Example 1

[0035] Please refer to the attached Figure 2, Air-energy floor heating mode: When it is cloudy or the sunlight is insufficient, turn off the flat-plate heat collection module, close the third stop valve and the fourth stop valve, open the first stop valve and the second stop valve, start the air source heat pump, heat the medium in the system, and at the same time, turn on the heat pump circulation pump, drive the medium along the air-energy outlet pipe and the first four-way pipe into the floor heating inlet pipe, and then divert it to each floor heating coil through the manifold. By adjusting the manifold, control some floor heating coils to open, some floor heating coils to open, or all floor heating coils to heat normally. In the process of flowing through the floor heating coil, the heat medium dissipates heat and provides heat to the room. Then it flows back to the air source heat pump along the floor heating return pipe through the second four-way pipe and the air-energy return pipe to circulate again.

[0036] Example 2

[0037] Please refer to the attached Figure 3 The air-to-water hot water mode: when it is cloudy or the sunlight is insufficient, turn off the flat-plate solar collector module, close the second stop valve and the third stop valve, open the first stop valve and the fourth stop valve, start the air source heat pump, heat the medium in the system, and at the same time turn on the heat pump circulation pump. The medium enters the heating water tank along the air-to-water outlet pipe, exchanges heat with the heat exchange coil in the heating water tank, and the medium in the heating water tank flows back to the air source heat pump along the air-to-water return pipe for further circulation. The medium with a higher temperature continuously circulates in the heating water tank, exchanges heat with the tap water in the heat exchange coil, and reaches the use temperature for use by the user terminal. The tap water has a high pressure, a fast flow rate in the heat exchange coil, and a fast heating and temperature rise. The water body stays in the heat exchange coil for a short time, will not breed bacteria, and is safer to use.

[0038] Example 3

[0039] Please refer to the attached Figure 4 , the solar floor heating mode: when the sunlight is relatively stable, the flat-plate heat collection module is used for heating. Close the first stop valve and the fourth stop valve, open the second stop valve and the third stop valve, the medium in the heat collection heating system of the flat-plate heat collection module, the medium enters the heating water tank along the heat collection outlet pipe, the medium in the heating water tank enters the floor heating water inlet pipe along the air energy outlet pipe and the first four-way pipe, and then is diverted to each floor heating coil through the manifold. By adjusting the manifold, a part of the floor heating coil is turned on, a part of the floor heating coil is turned on, or all the floor heating coils are heated normally. In the process of flowing through the floor heating coil, the heat medium dissipates heat and provides heat to the room. Then it flows back to the flat-plate heat collection module along the floor heating return pipe through the second four-way pipe and the heat collection return pipe to circulate again until the room temperature reaches the set value.

[0040] Example 4

[0041] Please refer to the attached Figure 5, the solar water heating mode: when the sunlight is relatively stable, the flat plate heat collection module is used for heating. Close the first stop valve and the second stop valve, open the third stop valve and the fourth stop valve, the flat plate heat collection module collects the medium in the heating system, and at the same time the solar circulation pump is turned on to drive the medium into the heating water tank along the heat collection outlet pipe, and the medium in the heating water tank exchanges heat with the tap water in the hot water exchange pipe. The tap water in the hot water exchange pipe has its own pressure, and after being heated, it flows along the water outlet to the user terminal for use. The tap water has a high pressure, a fast flow rate in the heat exchange coil, and a fast heating temperature rise. The water body stays in the heat exchange coil for a short time, will not breed bacteria, and is safer to use.

[0042] The medium in the heating water tank flows back to the flat plate heat collector module along the fourth stop valve and the third stop valve on the heat collector return pipe and circulates again. The medium with a higher temperature circulates continuously in the heating water tank and exchanges heat with the tap water in the heat exchange coil. The tap water heats up faster and provides hot water to the user terminal faster.

[0043] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flat-plate solar energy and air source heat pump coupled hot water heating system, characterized in that: The invention comprises an air source heat pump (1), a flat plate heat collection module (8), a heating water tank (9) and a floor heating module (7); a heat collection water outlet pipe (801) is provided between the flat plate heat collection module and the heating water tank; an air energy water outlet pipe (101) and an air energy water return pipe (102) are provided between the air source heat pump and the heating water tank; a first four-way pipe (4) is provided on the air energy water outlet pipe; the first four-way pipe is connected to the floor heating module via a floor heating water inlet pipe; and an expansion tank (5) is also connected to the first four-way pipe; A fourth stop valve (14), a heat pump circulation pump (3) and a first stop valve (2) are sequentially arranged on the air energy return pipe along the return direction of liquid; a second four-way pipe (13) is arranged between the fourth stop valve and the heat pump circulation pump; the second four-way pipe is connected to the flat-plate heat collection module through a heat collection return pipe (802); a solar energy circulation pump (6) and a third stop valve (10) are sequentially arranged on the heat collection return pipe along the return direction; the second four-way pipe is connected to each floor heating module through a floor heating return pipe; and a second stop valve (12) is arranged on the floor heating return pipe.

2. The flat-plate solar energy and air source heat pump coupled hot water heating system according to claim 1 is characterized in that: The heating water tank (9) is provided with a hot water exchange pipe (901), which includes a water inlet and a water outlet, the water inlet is connected to the tap water pipe, and the water outlet is connected to the user terminal. The heating water tank is also provided with an exhaust port, and the exhaust port is provided with a first exhaust valve (902).

3. The flat-plate solar energy and air source heat pump coupled hot water heating system according to claim 1 is characterized in that: The flat-plate heat collection module (8) comprises a plurality of heat collection headers arranged in parallel, each heat collection header is connected to a heat collection outlet pipe and a heat collection return pipe, and a second exhaust valve (803) is arranged in parallel on the heat collection outlet pipe.

4. The flat-plate solar energy and air source heat pump coupled hot water heating system according to claim 1 is characterized in that: The floor heating module (7) comprises a manifold (11) connected to the floor heating water inlet pipe, the manifold is provided with a plurality of water outlets, and each water outlet is connected to a floor heating coil.

5. The flat-plate solar energy and air source heat pump coupled hot water heating system according to any one of claims 1 to 4, characterized in that: Including air-energy floor heating mode, air-energy hot water mode, solar floor heating mode, solar hot water mode; Air-source floor heating mode: Close the third stop valve and the fourth stop valve, open the first stop valve and the second stop valve, start the air source heat pump, and heat the medium in the system. The medium enters the floor heating inlet pipe along the air-source water outlet pipe and the first four-way pipe, and then is diverted to each floor heating coil through the manifold, and then flows back to the air source heat pump along the floor heating return pipe through the second four-way pipe and the air-source water return pipe for further circulation.

6. The flat-plate solar energy and air source heat pump coupled hot water heating system according to claim 5 is characterized in that: The air-energy hot water mode: close the second stop valve and the third stop valve, open the first stop valve and the fourth stop valve, start the air source heat pump, heat the medium in the system, the medium enters the heating water tank along the air energy outlet pipe, exchanges heat with the heat exchange coil in the heating water tank, and the medium in the heating water tank flows back to the air source heat pump along the air energy return pipe for recirculation.

7. The flat-plate solar energy and air source heat pump coupled hot water heating system according to claim 5 is characterized in that: The solar floor heating mode: close the first stop valve and the fourth stop valve, open the second stop valve and the third stop valve, the flat-plate collector module collects the medium in the heating system, the medium enters the heating water tank along the collector outlet pipe, the tap water in the heat exchange water pipe is heated and flows along the outlet to the use terminal, the medium in the heating water tank enters the floor heating water inlet pipe along the air energy outlet pipe and the first four-way pipe, and then is diverted to each floor heating coil through the manifold, and then flows back to the flat-plate collector module along the floor heating return pipe through the second four-way pipe and the collector return pipe for further circulation.

8. The flat-plate solar energy and air source heat pump coupled hot water heating system according to claim 5 is characterized in that: The solar water heating mode: close the first stop valve and the second stop valve, open the third stop valve and the fourth stop valve, the flat-plate collector module collects the medium in the heating system, the medium enters the heating water tank along the collector outlet pipe, the tap water in the heat exchange water pipe is heated and flows along the outlet to the use terminal, the medium in the heating water tank flows back to the flat-plate collector module along the fourth stop valve and the third stop valve on the collector return pipe in turn for recirculation.

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