High-temperature heat storage heating system

Abstract

The utility model discloses a high-temperature heat storage heating system which comprises a solar heat collector body, a first heat exchanger and a second heat exchanger, a whole heat preservation box is arranged on one side of the solar heat collector body, and one end of the solar heat collector body is communicated with a first conveying pump through a pipeline. One end of the first conveying pump communicates with a first conveying pipe, one end of the first conveying pipe communicates with the first heat exchanger, a heat medium outlet of the first heat exchanger communicates with a first backflow pipe, one end of the first backflow pipe communicates with the oil inlet end of the solar heat collector body, and the surface of the first conveying pipe communicates with a heat preservation pipe. One end of the heat preservation pipe communicates with the top of the whole heat preservation box, and a first electromagnetic valve is installed on the surface of the first conveying pipe. The phase-change material absorbs heat energy and is matched with the heat preservation structure, so that the heat can be stored for a longer time, the heat exchange efficiency is improved by being matched with the double heat exchangers for heating, the heat requirement of a user is met, and power resource consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat storage and energy saving, in particular to a high-temperature heat storage heating system. Background Technique

[0002] A solar collector can convert solar energy into heat energy, thereby heating water from a low temperature to a high temperature to meet the hot water usage requirements of people in production and life. The solar heating work involves day and night as well as different seasons.

[0003] Due to the large influence of the solar collector by the day-night temperature difference and seasonal temperature, when the high-temperature medium is transferred to the heating equipment, the heat supply required by users at night is greater than that during the day. The traditional solar water heater only uses a heat preservation water tank for heat preservation and is equipped with an electric heater for temperature rise. If the temperature is not raised by the electric heater, the heat provided by the high-temperature medium may not be able to guarantee the heat demand of users, resulting in more power consumption for the electric heater to raise the temperature when users use heat at night, especially in winter, thus leading to poor heating effect and large consumption of electric power resources, making it difficult to meet the usage requirements. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-temperature heat storage heating system, which can absorb heat energy through a phase change material and cooperate with a heat preservation structure to make the heat be stored for a longer time, and cooperate with a double heat exchanger for heating to improve the heat exchange efficiency, meet the heat demand of users and reduce the consumption of electric power resources.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A high-temperature heat storage heating system, comprising a solar collector body, a first heat exchanger and a second heat exchanger. A heat preservation box body is arranged on one side of the solar collector body. One end of the solar collector body is connected through a pipeline to a first delivery pump. One end of the first delivery pump is connected to a first delivery pipe. One end of the first delivery pipe is connected to the first heat exchanger. The hot medium outlet of the first heat exchanger is connected to a first return pipe. One end of the first return pipe is connected to the oil inlet end of the solar collector body. A heat preservation pipe is connected to the surface of the first delivery pipe. One end of the heat preservation pipe is connected to the top of the heat preservation box body. A first solenoid valve is installed on the surface of the first delivery pipe. A second solenoid valve is installed on the surface of the heat preservation pipe. A return pipe is connected to the surface of the heat preservation box body. The return pipe is connected to the first return pipe. The cold medium outlet of the first heat exchanger is connected to a user shunt pipe. One end of the user shunt pipe is connected to the cold medium inlet of the second heat exchanger. A user return pipe is connected to the surface of the user shunt pipe. The cold medium outlet of the second heat exchanger is connected to a third return pipe. The third return pipe is connected to the user return pipe. A third solenoid valve and a first thermocouple are installed on the surface of the user shunt pipe. A second delivery pump and a second return pipe are connected to one end of the heat preservation box body. A second delivery pipe is connected to the surface of the second delivery pump. The second delivery pipe is connected to the hot medium inlet of the second heat exchanger. One end of the second return pipe is connected to the hot medium outlet of the second heat exchanger. A controller is installed on the surface of the heat preservation box body. A fourth solenoid valve is installed on the surface of the user return pipe.

[0006] As a preferred embodiment of the high-temperature heat storage heating system of the present utility model, the heat preservation box body comprises a heat preservation shell. Two support plates are fixed to the inner wall of the heat preservation shell. A first heat exchange pipe is fixed to the surface of the support plate. One end of the first heat exchange pipe is connected to a second heat exchange pipe. One end of the second heat exchange pipe is connected to the return pipe. A plurality of PCM blocks are evenly distributed on the inner wall of the heat preservation shell. The PCM blocks are fixedly connected to the inner wall of the heat preservation shell. Paraffin is filled inside the PCM blocks. A heat preservation board is fixed to the surface of the heat preservation shell. A heat preservation coating is provided on the inner wall of the heat preservation shell. An electric heating plate is fixedly embedded on the inner wall of the heat preservation shell. A second thermocouple is installed on the surface of the heat preservation shell.

[0007] As a preferred embodiment of the high-temperature heat storage heating system of the present utility model, a pressure relief valve is connected to the top of the heat preservation shell. A pressure gauge is installed on the top of the heat preservation shell.

[0008] As a preferred embodiment of the high-temperature heat storage heating system of the present utility model, the heat preservation board is a rock wool board. The heat preservation shell is made of stainless steel. The heat preservation coating on the inner wall of the heat preservation shell is a nano-adiabatic coating layer.

[0009] Preferably, as a high-temperature heat storage heating system of the present utility model, the first heat exchange tube is arranged in a spiral structure, and the second heat exchange tube is arranged in a serpentine structure.

[0010] Preferably, as a high-temperature heat storage heating system of the present utility model, check valves are installed on the surfaces of the return pipe and the first return pipe.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] Through a multi-stage heat exchange design, the present utility model can more efficiently utilize the heat collected by the solar collector body, store heat when solar energy is sufficient, cooperate with the PCM block to absorb heat and release it when the heat of the solar collector body is insufficient, improve the heat exchange efficiency, reduce the dependence on the electric heating plate, thereby reducing the overall power consumption, reducing the cost of using electricity or other energy sources during peak hours, and reducing heat loss. Moreover, even at night or when the light is insufficient in winter, the overall heat preservation box can provide stable heat energy supply to ensure stable heat output for users in any situation. Description of the Drawings

[0013] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model;

[0014] Figure 2 It is a three-dimensional structure schematic diagram of another perspective of the present utility model;

[0015] Figure 3 It is a partial structure schematic diagram of the present utility model;

[0016] Figure 4 It is a cross-sectional structure schematic diagram of the overall heat preservation box of the present utility model.

[0017] In the figure: 1, solar collector body; 2, overall heat preservation box; 201, heat preservation shell; 202, first heat exchange tube; 203, support plate; 204, second heat exchange tube; 205, second thermocouple; 206, electric heating plate; 207, pressure relief valve; 208, PCM block; 209, heat preservation board; 3, first heat exchanger; 4, second heat exchanger; 5, first delivery pump; 6, first delivery pipe; 7, first solenoid valve; 8, first return pipe; 9, second solenoid valve; 10, heat preservation pipe; 11, return pipe; 12, second delivery pump; 13, second delivery pipe; 14, second return pipe; 15, user shunt pipe; 16, first thermocouple; 17, user return pipe; 18, third solenoid valve; 19, third return pipe; 20, check valve; 21, controller; 22, fourth solenoid valve. Detailed Embodiments

[0018] Please refer to Figures 1-4, a high-temperature heat storage heating system, comprising a solar collector body 1, a first heat exchanger 3 and a second heat exchanger 4. A heat preservation box assembly 2 is arranged on one side of the solar collector body 1. The oil outlet end of the solar collector body 1 is connected through a pipeline to a first delivery pump 5. One end of the first delivery pump 5 is connected to a first delivery pipe 6. One end of the first delivery pipe 6 is connected to the heat medium inlet of the first heat exchanger 3. The heat medium outlet of the first heat exchanger 3 is connected to a first return pipe 8. One end of the first return pipe 8 is connected to the oil inlet end of the solar collector body 1. A heat preservation pipe 10 is connected to the surface of the first delivery pipe 6. One end of the heat preservation pipe 10 is connected to the top of the heat preservation box assembly 2. A first electromagnetic valve 7 is installed on the surface of the first delivery pipe 6. A second electromagnetic valve 9 is installed on the surface of the heat preservation pipe 10. A return pipe 11 is connected to the surface of the heat preservation box assembly 2. The return pipe 11 is connected to the first return pipe 8. The cold medium outlet of the first heat exchanger 3 is connected to a user shunt pipe 15. One end of the user shunt pipe 15 is connected to the cold medium inlet of the second heat exchanger 4. A user return pipe 17 is connected to the surface of the user shunt pipe 15. The cold medium outlet of the second heat exchanger 4 is connected to a third return pipe 19. The third return pipe 19 is connected to the user return pipe 17. A third electromagnetic valve 18 and a first thermocouple 16 are installed on the surface of the user shunt pipe 15. One end of the heat preservation box assembly 2 is connected to a second delivery pump 12 and a second return pipe 14. A second delivery pipe 13 is connected to the surface of the second delivery pump 12. The second delivery pipe 13 is connected to the heat medium inlet of the second heat exchanger 4. One end of the second return pipe 14 is connected to the heat medium outlet of the second heat exchanger 4. A controller 21 is installed on the surface of the heat preservation box assembly 2. A fourth electromagnetic valve 22 is installed on the surface of the user return pipe 17. The interior of the heat preservation box assembly 2 is filled with a heat-conducting medium;

[0019] When the user needs to use heat during the day, the first transfer pump 5 starts to extract the heat transfer oil inside the solar collector body 1 and transports it to the inside of the first heat exchanger 3, and then returns to the inside of the solar collector body 1 through the first return pipe 8. After the user's cold medium enters through the cold medium inlet of the first heat exchanger 3 and exchanges heat, it is then transported to the inside of the user return pipe 17 through the user shunt pipe 15, thus completing the heat exchange and use. When the user does not use heat, the heat transfer oil inside the solar collector body 1 can be transported to the inside of the overall insulation box 2 through the insulation pipe 10, so that the heat transfer medium inside the overall insulation box 2 can be heated up, and then returns to the inside of the solar collector body 1 through the return pipe 11 and the first return pipe 8. When the user exchanges heat at night, the user's cold medium first exchanges heat through the first heat exchanger 3 and then enters the inside of the user shunt pipe 15. At this time, the first thermocouple 16 will monitor the temperature of the medium to be heated by the user. When the temperature reaches the threshold value, the user medium is normally sent out through the user return pipe 17. When the threshold value is not reached, the fourth solenoid valve 22 closes and the third solenoid valve 18 opens. At the same time, the second transfer pump 12 extracts the heated heat transfer medium inside the overall insulation box 2 and transports it to the inside of the second heat exchanger 4 through the second transfer pipe 13. At this time, the user medium will be transported to the inside of the second heat exchanger 4 through the user shunt pipe 15 to conduct secondary heat exchange with the heat transfer medium, thereby further increasing the temperature of the user medium, and then is re-discharged to the inside of the user return pipe 17 through the third return pipe 19 to complete the return. The heat transfer medium returns to the inside of the overall insulation box 2 through the second return pipe 14. Through this multi-stage heat exchange design, the heat collected by the solar collector body 1 can be utilized more efficiently, store heat when solar energy is sufficient, reduce the cost of using electricity or other energy sources during peak hours, and reduce heat loss. Even in the case of insufficient sunlight at night or in winter, the overall insulation box 2 can provide a stable heat energy supply to ensure a stable heat output for the user under any circumstances.

[0020] Further, the overall insulation box 2 includes an insulation shell 201. Two support plates 203 are fixed to the inner wall of the insulation shell 201. The first heat exchange pipe 202 is fixed to the surface of the support plate 203. One end of the first heat exchange pipe 202 is communicated with the second heat exchange pipe 204. One end of the second heat exchange pipe 204 is communicated with the return pipe 11. A plurality of PCM blocks 208 are evenly distributed on the inner wall of the insulation shell 201. The PCM blocks 208 are fixedly connected to the inner wall of the insulation shell 201. Paraffin is filled inside the PCM blocks 208. The insulation board 209 is fixed to the surface of the insulation shell 201. The inner wall of the insulation shell 201 is provided with an insulation coating. The electric heating plate 206 is fixedly embedded on the inner wall of the insulation shell 201. The second thermocouple 205 is installed on the surface of the insulation shell 201;

[0021] When the user does not exchange heat through the first heat exchanger 3, the first solenoid valve 7 closes, allowing the high-temperature heat-conducting oil inside the solar collector body 1 to enter the inside of the first heat exchange tube 202 through the heat-insulating pipe 10, and after being transported to the inside of the return pipe 11 by the second heat exchange tube 204, the heat-conducting oil reflows back to the solar collector body 1 through the first return pipe 8 for heating, enabling the heat-conducting medium inside the heat-insulating shell 201 to be in a continuously heated state during the day. The paraffin filled inside the PCM block 208 has a high latent heat value, and it can store a large amount of heat during the phase change process. Even when the temperature of the heat-conducting oil no longer rises, the paraffin can continue to absorb heat until all the paraffin is completely melted. When the temperature inside the overall heat-insulating box 2 decreases due to the solar collector body 1 not working at night, the temperature of the heat-conducting oil is lower than the phase change temperature of the paraffin, and the paraffin begins to change from a liquid state to a solid state. During this process, the heat absorbed before is released, enabling the PCM block 208 to maintain a constant temperature for a long time, thereby reducing heat loss. The use of the heat-insulating board 209 and the heat-insulating coating can effectively reduce the heat loss of the heat storage device, and is more conducive to maintaining the temperature inside the heat storage device. Moreover, the heat-conducting oil transported by the solar collector body 1 can also exchange heat with the PCM block 208. This multi-stage heat exchange design can utilize the heat stored in the PCM block 208 for secondary heating when the heat of the solar collector body 1 is insufficient, improving the heat exchange efficiency and reducing the dependence on the electric heating plate 206, thereby reducing the overall power consumption. And even in the case of insufficient sunlight at night or in winter, the second thermocouple 205 can detect the temperature inside the heat-insulating shell 201, and the electric heating plate 206 can also raise the temperature inside the heat-insulating shell 201, enabling the heat-insulating shell 201 to provide a stable heat energy supply and improving the reliability and stability of the system.

[0022] Furthermore, a pressure relief valve 207 is connected to the top of the heat-insulating shell 201, and a pressure gauge is installed on the top of the heat-insulating shell 201;

[0023] The pressure relief valve 207 can automatically open when the pressure inside the heat-insulating shell 201 exceeds a predetermined safety threshold, releasing the excess pressure to prevent explosions or other safety accidents caused by excessive internal pressure. The pressure gauge allows the operator to understand the pressure situation inside the heat storage device in real time, which helps to promptly detect abnormal situations, such as sudden increases or decreases in pressure.

[0024] Furthermore, the heat-insulating board 209 is a rock wool board, the heat-insulating shell 201 is made of stainless steel, and the heat-insulating coating on the inner wall of the heat-insulating shell 201 is a nano-insulating coating layer;

[0025] Rock wool is an efficient thermal insulation material that can effectively reduce the heat exchange between the inside and outside of the heat storage device, reduce heat loss. Stainless steel has excellent corrosion resistance and can remain stable even in high-temperature and humid environments. The nano-thermal insulation coating can form a dense protective layer with extremely low thermal conductivity, which can effectively improve the heat insulation performance of the heat insulation shell 201 and improve the thermal energy storage efficiency.

[0026] Furthermore, the first heat exchange tube 202 is arranged in a spiral structure, and the second heat exchange tube 204 is arranged in a serpentine structure;

[0027] The curved structure of the spiral first heat exchange tube 202 can increase its own length while promoting the formation of turbulence in the fluid. Turbulence can destroy the fluid boundary layer and increase the heat transfer rate, thereby improving the heat exchange efficiency. The serpentine second heat exchange tube 204 can also increase the heat exchange area by increasing the length of the tube, making the fluid stay in the tube for a longer time, increasing the contact time between the fluid and the tube wall, and improving the heat exchange efficiency.

[0028] Furthermore, check valves 20 are installed on the surfaces of the return pipe 11 and the first return pipe 8;

[0029] The setting of the check valve 20 enables the liquid to flow in multiple pipes in the specified direction according to requirements, avoiding the occurrence of backflow.

[0030] The controller 21 is electrically connected to the first delivery pump 5, the second delivery pump 12, the first solenoid valve 7, the second solenoid valve 9, the third solenoid valve 18, the fourth solenoid valve 22, the first thermocouple 16, the second thermocouple 205, and the electric heating plate 206.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-temperature heat storage heating system, comprising a solar collector body (1), a first heat exchanger (3) and a second heat exchanger (4), characterized in that: On one side of the solar collector body (1), there is an overall heat preservation box (2). One end of the solar collector body (1) is connected to a first delivery pump (5) through a pipeline. One end of the first delivery pump (5) is connected to a first delivery pipe (6). One end of the first delivery pipe (6) is connected to a first heat exchanger (3). The hot medium outlet of the first heat exchanger (3) is connected to a first return pipe (8). One end of the first return pipe (8) is connected to the oil inlet end of the solar collector body (1). The surface of the first delivery pipe (6) is connected to a heat preservation pipe (10). One end of the heat preservation pipe (10) is connected to the top of the overall heat preservation box (2). A first electromagnetic valve (7) is installed on the surface of the first delivery pipe (6). A second electromagnetic valve (9) is installed on the surface of the heat preservation pipe (10). The surface of the overall heat preservation box (2) is connected to a return pipe (11). The return pipe (11) is connected to the first return pipe (8). The cold medium outlet of the first heat exchanger (3) is connected to a user shunt pipe (15). One end of the user shunt pipe (15) is connected to the cold medium inlet of a second heat exchanger (4). The surface of the user shunt pipe (15) is connected to a user return pipe (17). The cold medium outlet of the second heat exchanger (4) is connected to a third return pipe (19). The third return pipe (19) is connected to the user return pipe (17). A third electromagnetic valve (18) and a first thermocouple (16) are installed on the surface of the user shunt pipe (15). One end of the overall heat preservation box (2) is connected to a second delivery pump (12) and a second return pipe (14). The surface of the second delivery pump (12) is connected to a second delivery pipe (13). The second delivery pipe (13) is connected to the hot medium inlet of the second heat exchanger (4). One end of the second return pipe (14) is connected to the hot medium outlet of the second heat exchanger (4). A controller (21) is installed on the surface of the overall heat preservation box (2). A fourth electromagnetic valve (22) is installed on the surface of the user return pipe (17).

2. The high-temperature heat storage heating system according to claim 1, wherein: The overall heat preservation box (2) includes a heat preservation shell (201). Two support plates (203) are fixed on the inner wall of the heat preservation shell (201). A first heat exchange pipe (202) is fixed on the surface of the support plate (203). One end of the first heat exchange pipe (202) is connected to a second heat exchange pipe (204). One end of the second heat exchange pipe (204) is connected to the return pipe (11). A plurality of PCM blocks (208) are evenly distributed on the inner wall of the heat preservation shell (201). The PCM blocks (208) are fixedly connected to the inner wall of the heat preservation shell (201). Paraffin is filled inside the PCM blocks (208). A heat preservation board (209) is fixed on the surface of the heat preservation shell (201). There is a heat preservation coating on the inner wall of the heat preservation shell (201). An electric heating plate (206) is embedded and fixed on the inner wall of the heat preservation shell (201). A second thermocouple (205) is installed on the surface of the heat preservation shell (201).

3. The high-temperature heat storage heating system according to claim 2, characterized in that: A pressure relief valve (207) is connected to the top of the heat preservation shell (201). A pressure gauge is installed on the top of the heat preservation shell (201).

4. The high-temperature heat storage heating system according to claim 2, wherein: The heat preservation board (209) is a rock wool board, the heat preservation shell (201) is made of stainless steel, and the inner wall heat preservation coating of the heat preservation shell (201) is a nano thermal insulation coating layer.

5. The high-temperature heat storage heating system according to claim 2, characterized in that: The first heat exchange tube (202) is arranged in a spiral structure, and the second heat exchange tube (204) is arranged in a serpentine structure.

6. The high-temperature heat storage heating system according to claim 1, wherein: One-way valves (20) are installed on the surfaces of the return pipe (11) and the first return pipe (8).

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