Photo-thermal heating system

Abstract

The utility model relates to the technical field of photo-thermal heating, in particular to a photo-thermal heating system which comprises a solar heat collecting device, a first heat storage water tank, a second heat storage water tank, a circulating water pump and a heating tail end. The solar heat collection device is used for achieving utilization of clean energy, solar energy is converted into heat energy to achieve photo-thermal clean heating, the first heat storage water tank is arranged to relieve the defects of intermittency and volatility of the clean energy, and tail end heat consumption fluctuation is reduced; the second heat storage water tank is additionally arranged for heat storage, energy waste in the illumination rich or useless heat demand period can be reduced, the tail end heating demand can be met by extracting the stored heat in the illumination insufficient period in cooperation with the circulating water pump, optimal configuration of heat energy is achieved, the clean energy utilization rate is increased, and the economical efficiency of the whole system is improved; the energy utilization efficiency is improved, meanwhile, stable and reliable heating is guaranteed, and the actual heating requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of photo-thermal heating, in particular to a photo-thermal heating system. BACKGROUND

[0002] Solar energy, as a kind of pollution-free, renewable energy, has been valued and concerned by all sectors of society.

[0003] In addition to the common photo-thermal power generation, photo-thermal heating of domestic hot water, the application of photo-thermal in the field of medium and low temperature is also a practical and effective way to solve the heating (cooling) of the vast number of residents in China, industrial and agricultural production, which can replace traditional coal-fired, gas-fired boiler in a large range, solve the problems of high pollution, high energy consumption, poor operation flexibility and other problems existing in heating, and effectively reduce the operation cost, and can obtain good social and economic benefits.

[0004] For example, the Chinese invention patent with application number 201711072498.2 provides a solar heating system and a control method thereof, which uses a solar heating device to heat a hot water supply device, so as to realize the conversion of light energy into heat energy.

[0005] However, on cloudy days or at night when the light is insufficient, it is easy to make the heating discontinuous and unstable, and usually needs to expand the installed capacity to ensure continuous and stable heating, but the construction cost is high, which limits the photo-thermal heating and cannot meet the actual use requirement. UTILITY MODEL CONTENT

[0006] The utility model aims at providing a photo-thermal heating system, which solves the technical problem of unstable photo-thermal heating at present.

[0007] The utility model solves the above technical problem by the following scheme:

[0008] A photo-thermal heating system, comprising a solar heat collecting device, a first heat storage water tank, a second heat storage water tank, a circulating water pump and a heating terminal.

[0009] The solar heat collecting device is connected with the first heat storage water tank through a first heat supply pipe, the first heat storage water tank, the heating terminal, the circulating water pump and the solar heat collecting device are connected in sequence,

[0010] The first port of the second heat storage water tank is connected with the first heat supply pipe through a first heat storage pipe, and the second port of the second heat storage water tank is connected between the circulating water pump and the solar heat collecting device.

[0011] Further limited, the first heat supply pipe is provided with a first heat supply switch, and the first heat storage pipe is connected between the first heat supply switch and the first heat storage water tank.

[0012] The water outlet end of the circulating water pump is connected with the solar heat collecting device through a second return pipe, and a first return switch is arranged on the second return pipe;

[0013] The second port of the second heat storage water tank is connected with the second return pipe through a second heat storage pipe, and the second heat storage pipe is connected between the first return switch and the circulating water pump.

[0014] Further limited, the first heat storage pipe is provided with a heat storage first switch, and the second heat storage pipe is provided with a heat storage second switch.

[0015] Further limited, the second heat storage water tank is provided with a third port, and the third port of the second heat storage water tank is connected with the first heat supply pipe through a third heat storage pipe, and the third heat storage pipe is connected between the first heat storage pipe and the first heat storage water tank.

[0016] The third heat storage pipe is provided with a heat storage third switch.

[0017] Further limited, the first port of the second heat storage water tank is located at the top of the second heat storage water tank, and the second port and the third port of the second heat storage water tank are located at the bottom of the second heat storage water tank.

[0018] Further limited, the heat outlet end of the heating terminal is connected with the water inlet end of the circulating water pump through the first return pipe.

[0019] The second heat storage pipe is connected with the circulating water pump through a heat storage branch pipe, one end of the heat storage branch pipe is connected with the second return pipe, and the other end of the heat storage branch pipe is connected with the first return pipe.

[0020] The heat storage branch pipe is provided with a heat storage fourth switch, and the heat storage fourth switch is close to one end of the heat storage branch pipe.

[0021] Further limited, the heat storage branch pipe is further provided with a heat storage fifth switch, the heat storage fifth switch is close to the other end of the heat storage branch pipe, and the second heat storage pipe is connected between the heat storage fourth switch and the heat storage fifth switch.

[0022] Further limited, the first heat supply pipe is further provided with a second heat supply switch, and the second heat supply switch is located between the third heat storage pipe and the first heat storage water tank.

[0023] The first return pipe is provided with a second return switch, and the second return switch is located between the heating terminal and the other end of the heat storage branch pipe.

[0024] Further limited, the photo-thermal heating system further comprises a clean energy electric heating device, and the clean energy electric heating device is connected between the first heat storage water tank and the heating terminal.

[0025] Further limited, the photo-thermal heating system further comprises a filter, the filter is connected between the circulating water pump and the heating terminal.

[0026] The utility model discloses beneficial effect lies in:

[0027] 1, the utility model discloses utilize solar energy heat collecting device to realize the utilization of clean energy, convert solar energy into heat energy and realize photo-thermal clean heating, set up the first heat storage water tank and alleviate the intermittent and fluctuation of clean energy, reduce the end heat fluctuation, store heat through the second heat storage water tank, can reduce the energy waste when the light is rich or useless heat demand period, can also cooperate circulating water pump and meet the terminal heating demand through the extraction of stored heat when the light is insufficient, realize the optimal allocation of heat energy, improve the clean energy utilization rate and the economy of whole system, improve energy utilization efficiency, guarantee heating stable and reliable, satisfy actual heating demand.

[0028] 2, the utility model discloses through the additional clean energy electric heating device, guarantees the heat source continuous stable output, also can digest wind and light electricity or valley electricity auxiliary heating, rationally utilize energy, realize the clean heating system of multi-energy complementation, reduce heating cost, further improve heating stability and economy.

[0029] 3, the utility model discloses can according to actual use demand in solar radiation weather directly through the first heat storage water tank and heat the terminal, heat the terminal through the first heat storage water tank and the second heat storage water tank while storing heat through the second heat storage water tank, store heat to the second heat storage water tank alone, heat the terminal through the second heat storage water tank alone and heat the terminal through the clean energy electric heating device, guarantee the heating stable, satisfy the heating demand under different use environment. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the photo-thermal heating system structure diagram of the utility model embodiment 1 narration;

[0031] Figure 2 It is the heat collecting and heating schematic diagram of the utility model embodiment 1 narration photo-thermal heating system;

[0032] Figure 3 It is the heat storage schematic diagram of the utility model embodiment 1 narration photo-thermal heating system;

[0033] Figure 4 It is the heat collecting / heat storage heating schematic diagram of the utility model embodiment 1 narration photo-thermal heating system;

[0034] Figure 5 It is the heat storage and heat release schematic diagram of the utility model embodiment 1 narration photo-thermal heating system;

[0035] Figure 6 The structure diagram of the photo-thermal heating system according to the embodiment 2 of the present application is shown in the figure.

[0036] In the figure, 10 - solar energy heat collecting device; 11 - first heat supply pipe; 12 - first heat supply switch; 13 - second heat supply switch; 20 - first heat storage water tank; 21 - second heat supply pipe; 30 - second heat storage water tank; 31 - first heat storage pipe; 32 - second heat storage pipe; 33 - third heat storage pipe; 34 - heat storage branch pipe; 35 - heat storage first switch; 36 - heat storage second switch; 37 - heat storage third switch; 38 - heat storage fourth switch; 39 - heat storage fifth switch; 40 - circulating water pump; 41 - second return pipe; 42 - first return switch; 50 - heating terminal; 51 - first return pipe; 52 - second return switch; 60 - clean energy electric heating device; 70 - filter. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0038] Embodiment 1

[0039] The present application provides a photo-thermal heating system, which comprises a solar energy heat collecting device 10, a first heat storage water tank 20, a second heat storage water tank 30, a circulating water pump 40 and a heating terminal 50; wherein the water outlet end of the solar energy heat collecting device 10 is communicated with the water inlet end of the first heat storage water tank 20 through a first heat supply pipe 11, the water outlet end of the first heat storage water tank 20, the heating terminal 50, the circulating water pump 40 and the water inlet end of the solar energy heat collecting device 10 are sequentially communicated, so as to realize the conversion of solar energy into heat energy for heating at the heating terminal 50; the first port of the second heat storage water tank 30 is communicated with the first heat supply pipe 11 through a first heat storage pipe 31, and the second port of the second heat storage water tank 30 is connected between the circulating water pump 40 and the solar energy heat collecting device 10.

[0040] When the sunlight is insufficient at night or on cloudy days, the hot water stored in the second heat storage water tank 30 is used to heat the heating terminal 50, so as to improve the stability of heating; therefore, the volume of the second heat storage water tank 30 is greater than that of the first heat storage water tank 20.

[0041] Reference Figure 1 In order to further improve the stability of heating of the photo-thermal heating system and facilitate the heating control according to actual needs, it is further illustrated that:

[0042] The water outlet end of the first heat storage water tank 20 is communicated with the heat inlet end of the heating terminal 50 through the second heat supply pipe 21, the heat outlet end of the heating terminal 50 is connected with the water inlet end of the circulating water pump 40 through the first return pipe 51, and the water outlet end of the circulating water pump 40 is connected with the water inlet end of the solar heat collecting device 10 through the second return pipe 41.

[0043] The first heat supply pipe 11 is provided with the first heat supply switch 12 and the second heat supply switch 13, the first heat supply switch 12 is close to the water outlet end of the solar heat collecting device 10, and the second heat supply switch 13 is close to the first heat storage water tank 20; the first return pipe 51 is provided with the second return switch 52, and the second return pipe 41 is provided with the first return switch 42, and the first return switch 42 is close to the water inlet end of the solar heat collecting device 10.

[0044] The second heat storage water tank 30 is provided with a third port, and the third port and the second port are located at the bottom of the second heat storage water tank 30, and the first port is located at the top of the second heat storage water tank 30.

[0045] The second heat storage water tank 30 is connected with the first heat supply pipe 11 through the third heat storage pipe 33, the first heat storage pipe 31 and the third heat storage pipe 33 are both located between the first heat supply switch 12 and the second heat supply switch 13, the first heat storage pipe 31 is close to the first heat supply switch 12, and the third heat storage pipe 33 is close to the second heat supply switch 13; the second port of the second heat storage water tank 30 is connected with the circulating water pump 40 through the second heat storage pipe 32 and the heat storage branch pipe 34 in sequence.

[0046] Specifically, one end of the heat storage branch pipe 34 is connected with the second return pipe 41, and the other end of the heat storage branch pipe 34 is connected between the circulating water pump 40 and the first return switch 42; the other end of the heat storage branch pipe 34 is connected with the first return pipe 51, and the other end of the heat storage branch pipe 34 is connected between the circulating water pump 40 and the second return switch 52, and the second port of the second heat storage water tank 30 is communicated with the heat storage branch pipe 34 through the second heat storage pipe 32.

[0047] Among them, the first heat storage pipe 31 is provided with a heat storage first switch 35, the second heat storage pipe 32 is provided with a heat storage second switch 36, the third heat storage pipe 33 is provided with a heat storage third switch 37, the heat storage branch pipe 34 is provided with a heat storage fourth switch 38 and a heat storage fifth switch 39, the heat storage fourth switch 38 is close to the first return switch 42, the heat storage fifth switch 39 is close to the second return switch 52, and the second heat storage pipe 32 is connected between the heat storage fourth switch 38 and the heat storage fifth switch 39.

[0048] Reference Figure 2 The light heat heating system provided by the embodiment can heat the heating terminal 50 through the first heat storage water tank 20 when there is a heating demand under sufficient light and there is no heating demand under insufficient light, and heat collection and heating are realized, specifically as follows:

[0049] Open the first heating switch 12, the second heating switch 13, the second return switch 52 and the first return switch 42 respectively; keep the first thermal storage switch 35, the second thermal storage switch 36, the third thermal storage switch 37, the fourth thermal storage switch 38 and the fifth thermal storage switch 39 closed.

[0050] At this time, the solar collector 10 heats the water inside and then flows into the first hot water storage tank 20 through the first heating pipe 11, causing the water temperature inside to rise steadily, thereby heating the heating terminal 50. After the heat exchange is completed, the water is reinjected into the solar collector 10 through the circulating water pump 40. This cycle continues, increasing the water temperature in the first hot water storage tank 20 while simultaneously providing heat to the heating terminal 50.

[0051] refer to Figure 3 The solar thermal heating system provided in this embodiment can, when there is sufficient sunlight and no heating demand, choose to store heat in the second hot water storage tank 30, specifically as follows:

[0052] Open the first heating switch 12, the first thermal storage switch 35, the second thermal storage switch 36, the fifth thermal storage switch 39, and the first return switch 42 respectively; keep the second heating switch 13, the second return switch 52, the third thermal storage switch 37, and the fourth thermal storage switch 38 closed.

[0053] At this time, the solar collector 10 heats the water inside and then flows into the second hot water storage tank 30 through the first heat storage pipe 31. The low-temperature water inside the second hot water storage tank 30 flows into the first return pipe 51 through the second heat storage pipe 32 and the heat storage branch pipe 34 in sequence, and then is injected back into the solar collector 10 through the circulating water pump 40, thereby increasing the water temperature inside the second hot water storage tank 30 and completing the heat storage.

[0054] refer to Figure 4 The solar thermal heating system provided in this embodiment requires heating when there is a need for heating both when there is sufficient sunlight and when there is insufficient sunlight. Specifically, it needs to store heat in the second hot water storage tank 30 when there is sufficient sunlight, and also needs to provide heating through the heating terminal 50 when there is sufficient sunlight, thus achieving heat collection / storage heating.

[0055] Open the first heating switch 12, the second heating switch 13, the first thermal storage switch 35, the second thermal storage switch 36, the fifth thermal storage switch 39, the second reflux switch 52, and the first reflux switch 42 respectively; keep the third thermal storage switch 37 and the fourth thermal storage switch 38 closed.

[0056] At this time, the solar heat collecting device 10 heats the water in it, and then the water flows into the first heat storage water tank 20 and the second heat storage water tank 30 through the first heat supply pipe 11, and the second heat storage water tank 30 is heated by circulating through the circulating water pump 40, and the first heat storage water tank 20 is used to supply heat to the heating terminal 50 in real time by circulating through the circulating water pump 40, and the actual demand is met.

[0057] Reference Figure 5 The second heat storage water tank 30 is heated when the light is sufficient, and the heating terminal 50 is heated by the second heat storage water tank 30 when the light is insufficient, so that the heat storage and heat release are realized, and specifically:

[0058] The heat storage third switch 37, the second heat supply switch 13, the second return flow switch 52, the heat storage second switch 36 and the heat storage fourth switch 38 are opened respectively; the first heat supply switch 12, the heat storage first switch 35, the heat storage fifth switch 39 and the first return flow switch 42 are kept closed.

[0059] At this time, the hot water in the second heat storage water tank 30 is injected into the first heat supply pipe 11 through the third heat storage pipe 33, and then flows through the first heat storage water tank 20 and the heating terminal 50 in turn, so that the heating demand of the heating terminal 50 is met; the low-temperature water flowing out of the heating terminal 50 is injected into the second heat storage water tank 30 through the second return flow pipe 41, the heat storage branch pipe 34 and the second heat storage pipe 32 in turn by means of the circulating water pump 40, so that the water supply circulation is realized.

[0060] Embodiment 2

[0061] Reference Figure 6 Based on embodiment 1, the photothermal heating system provided by the embodiment further comprises a clean energy electric heating device 60 and a filter 70, wherein the clean energy electric heating device 60 is used for auxiliary heating of the water in the second heat supply pipe 21, the power supply of the clean energy electric heating device 60 can be obtained by wind power generation or solar power generation storage, or can be powered by valley electricity, so that the clean energy electric heating device 60 can be used to further ensure that the heating temperature of the heating terminal 50 is stable and reliable during heat storage and heat release.

[0062] The filter 70 is installed on the first return flow pipe 51, and the filter 70 is located between the circulating water pump 40 and the other end of the heat storage branch pipe 34, and is used to improve the service life of the pipe.

[0063] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A solar thermal heating system, characterized in that, The application relates to a solar energy heating device, which comprises a solar energy collecting device (10), a first heat storage water tank (20), a second heat storage water tank (30), a circulating water pump (40) and a heating terminal (50). The solar energy collecting device (10) is connected with the first heat storage water tank (20) through a first heat supply pipe (11), the first heat storage water tank (20), the heating terminal (50), the circulating water pump (40) and the solar energy collecting device (10) are sequentially connected, The first port of the second heat storage water tank (30) is connected with the first heat supply pipe (11) through a first heat storage pipe (31), and the second port of the second heat storage water tank (30) is connected between the circulating water pump (40) and the solar energy collecting device (10).

2. A solar heating system according to claim 1, wherein, The first heat supply pipe (11) is provided with a first heat supply switch (12), and the first heat storage pipe (31) is connected between the first heat supply switch (12) and the first heat storage water tank (20). The water outlet end of the circulating water pump (40) is connected with the solar energy collecting device (10) through a second return pipe (41), and the second return pipe (41) is provided with a first return switch (42). The second port of the second heat storage water tank (30) is connected with the second return pipe (41) through a second heat storage pipe (32), and the second heat storage pipe (32) is connected between the first return switch (42) and the circulating water pump (40).

3. A system according to claim 2, wherein, The first heat storage pipe (31) is provided with a first heat storage switch (35), and the second heat storage pipe (32) is provided with a second heat storage switch (36).

4. A heat supply system according to claim 3, c h a r a c t e r i s e d in that The second heat storage water tank (30) is provided with a third port, the third port of the second heat storage water tank (30) is connected with the first heat supply pipe (11) through a third heat storage pipe (33), and the third heat storage pipe (33) is connected between the first heat storage pipe (31) and the first heat storage water tank (20). The third heat storage pipe (33) is provided with a third heat storage switch (37).

5. A solar heating system according to claim 4, wherein, The first port of the second heat storage water tank (30) is located at the top of the second heat storage water tank (30), and the second port and the third port of the second heat storage water tank (30) are located at the bottom of the second heat storage water tank (30).

6. A solar heating system according to claim 4, wherein, The heat outlet end of the heating terminal (50) is connected with the water inlet end of the circulating water pump (40) through a first return pipe (51). The second heat storage pipe (32) is connected with the circulating water pump (40) through a heat storage branch pipe (34), one end of the heat storage branch pipe (34) is connected with the second return pipe (41), and the other end of the heat storage branch pipe (34) is connected with the first return pipe (51). The heat storage branch pipe (34) is provided with a fourth heat storage switch (38), and the fourth heat storage switch (38) is close to one end of the heat storage branch pipe (34).

7. A solar heating system according to claim 6, wherein, The heat storage branch pipe (34) is further provided with a fifth heat storage switch (39), the fifth heat storage switch (39) is close to the other end of the heat storage branch pipe (34), and the second heat storage pipe (32) is connected between the fourth heat storage switch (38) and the fifth heat storage switch (39).

8. A solar heating system according to claim 7, wherein, The first heat supply pipe (11) is further provided with a second heat supply switch (13), and the second heat supply switch (13) is located between the third heat storage pipe (33) and the first heat storage water tank (20). The first return pipe (51) is provided with a second return switch (52), which is located between the heating terminal (50) and the other end of the heat storage branch pipe (34).

9. A solar heating system according to any one of claims 1 to 8, wherein, The photo-thermal heating system further comprises a clean energy electric heating device (60), which is connected between the first heat storage water tank (20) and the heating terminal (50).

10. A solar heating system according to claim 9, wherein, The photo-thermal heating system further comprises a filter (70), which is connected between the circulating water pump (40) and the heating terminal (50).

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