Tail end phase change energy storage solar intelligent heating system

Abstract

The invention discloses a terminal phase change energy storage solar intelligent heating system which comprises a solar heating system, a heat storage and heat removal terminal and an intelligent temperature control system. The solar heating system comprises a solar cell panel, an inverter and a heating cavity, the heating cavity is connected with a water inlet pipe, the heat storage and heat removal tail end comprises a heating cabinet, a phase change cabinet is arranged on the lower portion of the heating cabinet and comprises an air heat exchange cavity and a phase change heat exchange cavity, a phase change heat exchange sleeve is arranged in the phase change heat exchange cavity, and the heating cavity is connected with the phase change heat exchange sleeve. A heating water pipe is arranged in the air heat exchange cavity and communicated with the phase-change heat exchange sleeve and a water inlet pipe, an air inlet is formed in the side wall of the air heat exchange cavity, and an air outlet is formed in the upper end of the air heat exchange cavity. The temperature intelligent control system comprises a second temperature sensor and a controller. The high-temperature phase-change material heat storage system and the high-temperature phase-change material heat removal system are integrated, heat storage is carried out on the high-temperature phase-change material in the daytime, heat removal is carried out on the high-temperature phase-change material at night, and the problem of night heating in winter in solar energy enriched areas can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of heating, and in particular to a terminal phase-change energy storage solar energy intelligent heating system. Background Art

[0002] As an economical, safe, and widely distributed renewable clean energy, solar energy has great potential for utilization. In areas rich in solar energy, the climate is characterized by cold winters and cool summers, and the demand for heating in winter is particularly strong. The temperature difference between day and night is large. During the day, the indoor temperature rises due to direct sunlight, but at night, the indoor temperature drops significantly. There is a gap between the unstable solar energy supply period and the energy demand of users. Therefore, indoor heating at night in winter has become an urgent problem to be solved in the region. Summary of the invention

[0003] The purpose of the present invention is to provide a terminal phase change energy storage solar energy intelligent heating system to solve the problem of winter night heating in solar energy-rich areas.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A terminal phase change energy storage solar intelligent heating system, characterized by: comprising a solar heating system, a heat storage and heat extraction terminal, and a temperature intelligent control system;

[0006] The solar heating system comprises a solar panel, an inverter, and a heating chamber, wherein the solar panel supplies power to the heating chamber via the inverter, the heating chamber is connected to a water inlet pipe, a main control valve is arranged on the water inlet pipe, a first temperature sensor is arranged in the heating chamber, and a second electric valve is arranged at the outlet end of the heating chamber;

[0007] The heat storage and heat extraction terminal includes a heating cabinet, a phase change cabinet is provided at the bottom of the heating cabinet, an air outlet shutter is provided on the upper side wall of the heating cabinet, the phase change cabinet includes an upper air heat exchange cavity and a lower phase change heat exchange cavity, a heat insulation layer is provided between the air heat exchange cavity and the phase change heat exchange cavity, a phase change heat sleeve is provided in the phase change heat exchange cavity, a high-temperature phase change material is encapsulated in the phase change heat sleeve, the phase change heat sleeve is arranged from bottom to top in the phase change heat exchange cavity to form a multi-layer coil structure, and the heating The cavity is installed in the heating cabinet and connected to the inlet end of the phase change heat exchange sleeve. A heating water pipe connected to the outlet end of the phase change heat exchange sleeve is arranged in the air heat exchange cavity. The heating water pipe is arranged from left to right in a multi-layer coil structure in the cavity heat exchanger, and the water outlet end of the heating water pipe is connected to the water inlet pipe. The left and right side walls of the air heat exchange cavity are both provided with air inlets extending to the side walls of the heating cabinet. An air outlet is provided at the upper end of the air heat exchange cavity, and fans are provided at the air outlet and the air inlet;

[0008] The temperature intelligent control system comprises a second temperature sensor and a controller arranged in the room, wherein the controller is connected to the second temperature sensor, the fan, the first temperature sensor and the second electric valve.

[0009] Furthermore, the phase change thermal sleeve includes a plurality of straight tubes and connecting elbows, and the straight tubes and the connecting elbows are alternately connected in sequence.

[0010] Furthermore, the straight tube and elbow connectors each include an outer tube and an inner tube, a sealing plug is provided at the end of the outer tube, the inner tube extends out of the sealing plug, a phase change filling cavity formed by the outer tube and the inner tube is filled with a high-temperature phase change material, the sealing plug of the straight tube and the sealing plug of the connecting elbow are detachably connected, and the inner tube of the straight tube and the inner tube of the connecting elbow are detachably sealed.

[0011] Furthermore, support members are provided at intervals on the outer side wall of the inner tube, and the support members include a sleeve, the sleeve is sleeved outside the inner tube, and a plurality of heat-conducting support plates adapted to the outer tube are evenly provided on the outer wall of the sleeve.

[0012] Furthermore, a spiral grid quick-heating pipe is provided in the heating chamber, and the spiral grid quick-heating pipe includes a spiral heating pipe and multiple groups of grid heating pipes. Each spiral of the spiral heating pipe is interconnected by a group of the grid heating pipes, and the grid heating pipes of two adjacent groups are staggered.

[0013] Furthermore, a third temperature sensor is provided in the heating chamber, the first temperature sensor and the third temperature sensor are symmetrically distributed at both ends of the heating chamber, a first electric valve and a water pump are provided at the inlet end of the heating chamber, the water pump is located between the first electric valve and the main control valve, the connecting end of the heating water pipe and the water inlet pipe is located between the water pump and the main control valve, and the third temperature sensor, the first electric valve, and the water pump are connected to the controller.

[0014] The present invention has the following advantages:

[0015] 1. This system integrates the high-temperature phase change material heat storage and heat extraction system to make the application more convenient. It provides heat to the high-temperature phase change material for heat storage during the day and extracts heat from the high-temperature phase change material at night. It can effectively cope with the problem of winter night heating in solar energy-rich areas and effectively solve the problem of unstable solar energy supply.

[0016] 2. The high-temperature phase change material is encapsulated in the phase change filling cavity composed of the outer tube and the inner tube, and the heat medium and the refrigerant are respectively introduced into the inner tube during the day and night. This not only enables sufficient heat exchange between the phase change material and the medium, but also saves the volume of the entire heat exchange end, making it convenient for home use.

[0017] 3. Spiral grid rapid heating pipes are used in the heat medium supply link. This type of rapid heating pipe has a grid connecting each spiral of the main heating pipe. The grids are staggered and compactly arranged, which slows down the flow rate of the medium flowing into the heating chamber while increasing the heating area of ​​the medium, thereby achieving sufficient heating of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the heat storage and heat extraction terminal of the present invention.

[0020] Figure 3 The structure and cross-sectional schematic diagram of the straight tube of the phase change heat sleeve of the present invention.

[0021] Figure 4 The structure and cross-sectional schematic diagram of the straight tube of the phase change heat sleeve of the present invention

[0022] Figure 5 It is a structural schematic diagram of the heating chamber of the present invention.

[0023] In the figure, 1-solar panel, 2-inverter, 3-heating chamber, 4-water inlet pipe, 5-main control valve, 6-first temperature sensor, 7-second electric valve, 8-heating cabinet, 9-phase change cabinet, 10-air outlet shutter, 11-air heat exchange chamber, 12-phase change heat exchange chamber, 13-insulation layer, 14-phase change heat sleeve, 1401 straight pipe, 1402 connecting elbow, 15-heating water pipe, 16-air inlet, 17-outlet Air outlet, 18-second temperature sensor, 19-controller, 20-spiral heating tube, 21-grid heating tube, 22-third temperature sensor, 23-first electric valve, 24-water pump, 25-third electric valve, 26-return pipe, 27-fourth electric valve, 28-outer tube, 29-inner tube, 30-sealing plug, 31-connecting sleeve, 32-sealing gasket, 33-sealing groove, 34-sleeve, 35-heat-conducting support plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] refer to Figure 1-5 As shown, one embodiment of the present invention is:

[0031] A terminal phase-change energy storage solar intelligent heating system, comprising a solar heating system, a heat storage and heat extraction terminal, and a temperature intelligent control system;

[0032] The solar heating system comprises a solar panel 1, an inverter 2, and a heating chamber 3. The solar panel 1 supplies power to the heating chamber 3 via the inverter 2. The heating chamber 3 is connected to a water inlet pipe 4, on which a main control valve 5 is provided. A first temperature sensor 6 is provided in the heating chamber 3, and a second electric valve 7 is provided at the outlet end of the heating chamber 3.

[0033] The heat storage and heat extraction terminal includes a heating cabinet 8, a phase change cabinet 9 is provided at the lower part of the heating cabinet 8, an air outlet shutter 10 is provided on the upper side wall of the heating cabinet 8, the phase change cabinet 9 includes an upper air heat exchange cavity 11 and a lower phase change heat exchange cavity 12, a heat insulation layer 13 is provided between the air heat exchange cavity 11 and the phase change heat exchange cavity 12, a phase change heat sleeve 14 is provided in the phase change heat exchange cavity 12, a high temperature phase change material is encapsulated in the phase change heat sleeve 14, the phase change heat sleeve 14 is arranged from bottom to top in the phase change heat exchange cavity 12 to form a multi-layer coil structure, the heating cavity 3 is installed in the heating cabinet 8 and connected to the inlet end of the phase change heat sleeve 14, a heating water pipe 15 connected to the outlet end of the phase change heat sleeve 14 is provided in the air heat exchange cavity 11, the heating water pipe 15 is arranged from left to right in the cavity heat exchanger 11 to form a multi-layer coil structure, and the water outlet end of the heating water pipe 15 is connected to the water inlet pipe 4, the left and right side walls of the air heat exchange cavity 11 are provided with air inlets 16 extending to the side walls of the heating cabinet 8, the upper end of the air heat exchange cavity 11 is provided with an air outlet 17, and the air outlet 17 and the air inlet 16 are both provided with fans;

[0034] The temperature intelligent control system includes a second temperature sensor 18 and a controller 19 arranged in the room. The controller 19 is connected to the second temperature sensor 18 , a fan, a first temperature sensor 6 , and a second electric valve 7 .

[0035] This system utilizes high-temperature phase change materials to fully store energy by exchanging heat with the heat medium during the day, while the refrigerant can fully absorb heat from the high-temperature phase change materials at night. When the high-temperature phase change materials release heat to the refrigerant, the heating water pipe brings the heated refrigerant into the forced heat exchange area, and the fan at the air inlet 16 forces the air in, and the fan at the air outlet 17 then delivers the hot air into the room, thereby achieving the effect of regulating the indoor temperature.

[0036] Specifically, the air 19 is also connected to an external remote control for user self-adjustment. In this embodiment, a phase change heat sleeve is filled with a high-temperature phase change material of 80°C. To ensure that the water inlet temperature is higher than the phase change temperature, the heating chamber 3 is set to be 50 cm long, which is located at the beginning of the water inlet pipe 4 entering the phase change heat chamber 12. The water inlet pipe 4 provides a heat exchange medium to the heating chamber. In this embodiment, the heat exchange medium is water. After the water is heated in the heating chamber 3, it is sent to the phase change heat sleeve 14. To improve the heating efficiency, a spiral grid fast heat pipe is provided in the heating chamber 3. The spiral grid fast heat pipe includes a spiral heating pipe 20 and a plurality of grid heating pipes 21. Each spiral of the spiral heating pipe 20 is interconnected by a group of the grid heating pipes 21, and the grid heating pipes 21 of two adjacent groups are staggered.

[0037] The spiral grid heat pipe is connected to the power supply cable, and a grid heating pipe 21 is arranged on each spiral of the spiral heating pipe 20 for communication, so that the grid heating pipe 21 can increase the heating area of ​​the medium while slowing down the flow rate of the medium flowing into the heating chamber, and fully heat the medium. In order to reduce heat loss, the outer side of the heating chamber 3 is covered with a thermal insulation layer to reduce heat loss and prevent users from contacting high temperature areas.

[0038] Furthermore, a third temperature sensor 22 is also provided in the heating chamber 3, the first temperature sensor 6 and the third temperature sensor 22 are symmetrically distributed at both ends of the heating chamber 3, a first electric valve 23 and a water pump 24 are provided at the inlet end of the heating chamber 3, the water pump 24 is located between the first electric valve 23 and the main control valve 5, the connecting end of the heating water pipe 15 and the water inlet pipe 4 is located between the water pump 24 and the main control valve 5, and the third temperature sensor 22, the first electric valve 23, and the water pump 24 are connected to the controller 19.

[0039] The first temperature sensor 6 and the third temperature sensor 22 are arranged in the heating chamber to monitor whether the temperature of the heated water reaches the set temperature (the controller preset temperature is 90°C), and the controller 19 controls the water pump 24 and the first electric valve 23 to supply water to the heating chamber, and supplies water to the phase change heat sleeve through the second electric valve 7. In the water supply, the controller 19 monitors the water temperature through the temperature sensor. When the water temperature monitored by either the first temperature sensor 6 or the third temperature sensor 22 is less than 90°C, the opening ratio of the first electric valve 23 and the second electric valve 7 is controlled in a linked manner to adjust the flow rate of the water entering the heating chamber 3 so that the spiral grid heat pipe can completely heat the water. After the water temperature detected by the first temperature sensor and the third temperature sensor reaches 90°C, the first electric valve 23 and the second electric valve 7 are restored to normal opening size, and this link is repeated during the heating process.

[0040] Furthermore, a third electric valve 25 is provided at the water inlet end of the heating water pipe 15, and a return pipe 26 is also provided at the outlet end of the phase change heat sleeve 14. A fourth electric valve 27 is provided at the inlet end of the return pipe 26. The return pipe 26 is installed in the phase change cabinet 9 and extends to communicate with the end of the heating water pipe 15. The controller connects the third electric valve 25 and the fourth electric valve 27. In the heat storage stage, the third electric valve 25 is closed and the fourth electric valve 27 is opened. The water in the heat storage stage flows back to the water inlet pipe 4 via the return pipe 26, so that the heating water pipe 15 is prevented from participating in the water reflux in the heat storage stage, shortening the length of the return pipeline and reducing heat loss. At the same time, the arrangement of the heating water pipe 15 and the return pipe 26 makes the system have some idle pipes inside the system during the heat storage and heat storage stages, which is beneficial to the steam pressure buffering inside the system pipeline.

[0041] In the heating stage, the third electric valve 25 is opened, the fourth electric valve 27 is closed, and the heating water enters the cold and hot water pipes 15 to exchange heat in the air heat exchange chamber for heating; in the heating stage, the fourth electric valve 27 can be opened synchronously, and the opening ratio of the third electric valve 25 and the fourth electric valve 27 can be adjusted to adjust the flow of the heating water entering the heating water pipe 15, so as to achieve dynamic regulation of the heating heat and effectively extend the heating time. In the heating stage, the first electric valve 23 and the second electric valve 7 are both kept in a normal open state and do not participate in the regulation of the heating heat. Although the water flow control can be achieved through the first electric valve 23 and the second electric valve 7, since they are frequently opened and closed during the heat storage stage, if they are also frequently adjusted during the heating stage, the equipment is easily damaged and the service life is reduced. In addition, the reaction time of the heating heat regulation has a certain lag, and the user cannot feel the heat change within a certain period of time and is easy to adjust repeatedly, thereby increasing the frequency of equipment adjustment. The third electric valve 25 and the fourth electric valve 27 are used for adjustment, so that the heating heat can be changed in a relatively short time, and the use frequency of each electric valve is balanced, thereby extending the service life of the equipment.

[0042] When the solar panel 1 supplies insufficient electricity, the grid heat pipe cannot heat the water in the heating chamber 3 to the set temperature. When setting, the controller 19, through the connected first temperature sensor 6 and the third temperature sensor 22, fails to detect that the water temperature reaches the set temperature within a certain period of time, and then closes the water pump 24, the first electric valve 23, and the second electric valve 7 to complete the heat storage work.

[0043] The second temperature sensor 18 installed in the room monitors the indoor temperature. When the heating set temperature is reached, the controller jointly controls the water pump 24, the first electric valve 23, and the second electric valve 7 to provide refrigerant (cold water) to the phase change heat sleeve 14. The cold water is heated in the phase change heat sleeve 14 and enters the heating water pipe 15. The fan at the air inlet 16 is started to blow the indoor cold air into the air heat exchange chamber 11. The cold air exchanges heat with the heating water pipe 15, and the air temperature rises. The fan in the air outlet 17 then blows the heated air into the upper part of the heating cabinet 8, and blows it into the room through the air outlet louvers arranged on the side wall, completing the process of taking heat from the phase change material.

[0044] Specifically, multiple second temperature sensors 18 can be set, which can be specifically arranged at appropriate positions indoors and at the air outlet 17 in the heating cabinet 8; heat dissipation fins can be set on the outer wall of the heating water pipe 15 to ensure sufficient heat exchange of the air; during the heating process, if the temperature sensor 18 detects that the air outlet 17 does not meet the set temperature for 10 consecutive seconds (such as the winter setting ≥18°C), regardless of whether it is set automatically or manually, the controller will be forced to shut down to complete the release of the heat stored in the phase change material during the day.

[0045] It is understandable that a battery assembly may also be built into the cooling and heating cabinet 8 and connected to the solar panel. The battery assembly is used to store electrical energy for use by components such as fans and water pumps in the system.

[0046] In this embodiment, the phase change thermowell 14 includes a plurality of straight tubes 1401 and connecting elbows 1402 , and the straight tubes 1401 and the connecting elbows 1402 are alternately connected in sequence.

[0047] The straight tube 1401 and the elbow connector 1402 both include an outer tube 28 and an inner tube 29. A sealing plug 30 is provided at the end of the outer tube 28. The inner tube 29 extends out of the sealing plug 30. The phase change filling cavity formed by the outer tube 28 and the inner tube 29 is filled with a high-temperature phase change material. The sealing plug 30 of the straight tube 1401 and the sealing plug 30 of the connecting elbow 1402 are detachably connected. The inner tube 29 of the straight tube 1401 and the inner tube 29 of the connecting elbow 1402 are detachably sealed and connected.

[0048] In order to ensure full utilization of solar energy and guarantee long-term heating needs at night, the phase-change heat exchange sleeve is arranged from bottom to top into a multi-layer coil structure in the phase-change heat exchange cavity. Based on this layout, the phase-change heat exchange sleeve leads to a longer pipeline length. If an integrated pipeline structure is adopted, once it is partially damaged or broken, it needs to be replaced and maintained as a whole, which is costly; and because it is encapsulated with solid-liquid phase change material, it will flow downward and accumulate in the lower pipeline in the liquid phase state of the high-temperature phase change material. The risk of pipeline rupture and damage is prone to occur during the thermal expansion and contraction of the high-temperature phase change material. Therefore, in this embodiment, the relevant heat exchange sleeve 14 adopts a split and detachable pipeline structure of a straight pipe 1401 and a connecting elbow 1402, which is convenient for maintenance and replacement while also reducing the risk of pipeline rupture.

[0049] Specifically, if Figure 3 , 4 As shown, in the outer pipe part: specifically, the sealing plug 30 of the straight pipe 1401 adopts an external thread structure, and correspondingly, a connecting sleeve 31 is arranged outside the sealing plug of the connecting elbow 1402, and the outer end of the connecting sleeve 31 is arranged with an internal thread structure adapted to the external thread structure to realize a detachable threaded connection between the straight pipe 1401 and the connecting elbow 1402. The threaded connection method can also appropriately adjust the pipe angle to facilitate installation. In the inner pipe part: specifically, a small-diameter pipe is adopted at the connecting end of the inner pipe 29 of the straight pipe 1401, and multiple sealing gaskets 32 are arranged on the outer wall. Correspondingly, a large-diameter pipe adapted to the small-diameter pipe is adopted at the connecting end of the inner end of the connecting elbow 1402, and a sealing groove 33 adapted to the sealing gasket 32 ​​is arranged on the large-diameter pipe. When the outer pipes are threadedly connected, the small-diameter pipe is correspondingly inserted into the large-diameter pipe, and multiple sealing gaskets 32 are used to realize a sealed connection between the inner pipes to prevent cold water from escaping. When the phase change filling cavity is filled with high-temperature phase change material, expansion space for the high-temperature phase change material to expand and contract due to heat and cold should be reserved.

[0050] In order to increase the heat exchange area and improve the heat exchange efficiency, in this embodiment, the outer wall of the inner tube 29 is spaced apart with a support member, and the support member includes a sleeve 34. The sleeve sleeve 34 is outside the inner tube 29, and the outer wall of the sleeve 34 is evenly provided with a plurality of heat-conducting support plates 35 adapted to the outer tube 28.

[0051] The number of the heat-conducting support plates 35 is preferably three. The support plates 35 can effectively ensure the centering of the inner tube 29. At the same time, the support plates 35 can increase the heat exchange area with the high-temperature phase change material, improve the heat exchange efficiency, and minimize the volume required for the heat exchange scene, which is convenient for the promotion and application of the overall system.

[0052] 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 terminal phase change energy storage solar energy intelligent heating system, characterized by: Including solar heating system, heat storage and heat extraction terminal, and temperature intelligent control system; The solar heating system comprises a solar panel, an inverter, and a heating chamber, wherein the solar panel supplies power to the heating chamber via the inverter, the heating chamber is connected to a water inlet pipe, a main control valve is arranged on the water inlet pipe, a first temperature sensor is arranged in the heating chamber, and a second electric valve is arranged at the outlet end of the heating chamber; The heat storage and heat extraction terminal includes a heating cabinet, a phase change cabinet is provided at the bottom of the heating cabinet, an air outlet shutter is provided on the upper side wall of the heating cabinet, the phase change cabinet includes an upper air heat exchange cavity and a lower phase change heat exchange cavity, a heat insulation layer is provided between the air heat exchange cavity and the phase change heat exchange cavity, a phase change heat sleeve is provided in the phase change heat exchange cavity, a high-temperature phase change material is encapsulated in the phase change heat sleeve, the phase change heat sleeve is arranged from bottom to top in the phase change heat exchange cavity to form a multi-layer coil structure, and the heating The cavity is installed in the heating cabinet and connected to the inlet end of the phase change heat exchange sleeve. A heating water pipe connected to the outlet end of the phase change heat exchange sleeve is arranged in the air heat exchange cavity. The heating water pipe is arranged from left to right in a multi-layer coil structure in the cavity heat exchanger, and the water outlet end of the heating water pipe is connected to the water inlet pipe. The left and right side walls of the air heat exchange cavity are both provided with air inlets extending to the side walls of the heating cabinet. An air outlet is provided at the upper end of the air heat exchange cavity, and fans are provided at the air outlet and the air inlet; The temperature intelligent control system includes a second temperature sensor and a controller arranged in the room. The controller is connected to the second temperature sensor, the fan, the first temperature sensor, and the second electric valve.

2. According to claim 1, a terminal phase change energy storage solar energy intelligent heating system is characterized by: The phase change thermal sleeve comprises a plurality of straight tubes and connecting elbows, and the straight tubes and the connecting elbows are connected alternately in sequence.

3. According to claim 2, a terminal phase change energy storage solar energy intelligent heating system is characterized by: The straight tube and elbow connectors both include an outer tube and an inner tube, a sealing plug is provided at the end of the outer tube, the inner tube extends out of the sealing plug, the phase change filling cavity formed by the outer tube and the inner tube is filled with the high-temperature phase change material, the sealing plug of the straight tube and the sealing plug of the connecting elbow are detachably connected, and the inner tube of the straight tube is detachably sealed and connected to the inner tube of the connecting elbow.

4. According to claim 3, a terminal phase change energy storage solar energy intelligent heating system is characterized by: The outer wall of the inner tube is provided with support members at intervals. The support members include a sleeve. The sleeve is sleeved outside the inner tube, and the outer wall of the sleeve is evenly provided with a plurality of heat-conducting support sheets adapted to the outer tube.

5. According to claim 1, a terminal phase change energy storage solar energy intelligent heating system is characterized by: A spiral grid quick-heating pipe is arranged in the heating chamber, and the spiral grid quick-heating pipe comprises a spiral heating pipe and a plurality of groups of grid heating pipes. Each spiral of the spiral heating pipe is interconnected by a group of the grid heating pipes, and the grid heating pipes of two adjacent groups are staggeredly distributed.

6. According to claim 1, a terminal phase change energy storage solar energy intelligent heating system is characterized by: A third temperature sensor is also provided in the heating chamber. The first temperature sensor and the third temperature sensor are symmetrically distributed at both ends of the heating chamber. A first electric valve and a water pump are provided at the inlet end of the heating chamber. The water pump is located between the first electric valve and the main control valve. The connecting end of the heating water pipe and the water inlet pipe is located between the water pump and the main control valve. The third temperature sensor, the first electric valve, and the water pump are connected to the controller.

7. According to claim 1, a terminal phase change energy storage solar energy intelligent heating system is characterized by: A third electric valve is provided at the water inlet end of the heating water pipe, a return pipe is also provided at the outlet end of the phase change heat exchanger sleeve, a fourth electric valve is provided at the inlet end of the return pipe, the return pipe is installed in the phase change cabinet and extends to communicate with the end of the heating water pipe, and the controller connects the third electric valve and the fourth electric valve.

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