Solar phase change heat storage heating system

Abstract

The utility model relates to the technical field of phase change heat storage, in particular to a solar phase change heat storage heating system which comprises a phase change heat storage box, a heat preservation layer is arranged on the surface of the phase change heat storage box, a bearing bottom plate is arranged on the lower surface of the heat preservation layer, and a built-in heating pipe is arranged in the phase change heat storage box. A heat storage water outlet and a tail end water supply port are formed in the upper end of the phase change heat storage tank, a heat storage water inlet and a tail end water return port are formed in the surface of the lower end of the phase change heat storage tank, and a first heat storage temperature probe is arranged on the portion, close to the heat storage water outlet, of the surface of the upper end of the phase change heat storage tank. And a heat storage temperature probe II is arranged on the surface of the lower end of the phase change heat storage tank close to the heat storage water inlet. According to the device, solar heat collection and phase change heat storage are mainly combined, when sunlight is sufficient, heat is provided for the tail end through solar heat collection, free energy is fully utilized, and heating operation cost is better reduced for a user.

Description

Technical Field

[0001] This utility model relates to the field of phase change thermal storage technology, and in particular to a solar phase change thermal storage heating system. Background Technology

[0002] Residential heating systems use hot water at a temperature not exceeding 60℃ as the heat medium, circulating in pipes to heat the floor or radiators. Heat is then distributed to the room through radiation and convection. Thermal storage electric heating equipment is a device that converts electrical energy into heat energy for a certain period, storing it and releasing it when needed to provide heating. The electricity can be generated from solar energy during the day and off-peak electricity at night. Through thermal storage, this system transforms the discontinuous use of solar heat into continuous or controllable heating, and also allows for grid connection. Peak shaving and valley filling improve energy utilization efficiency. Thermal storage materials can be divided into two types according to the thermal storage medium: sensible thermal storage and latent thermal storage. Sensible thermal storage is generally divided into water storage and solid storage. Water storage is low in cost, safe, has a small thermal density per unit volume, and requires a large area. Solid storage uses solid materials to achieve sensible thermal storage with a large temperature difference. Its advantage is a large thermal density, but its disadvantage is a large heat exchange temperature difference and a large heat loss. Latent thermal storage utilizes the characteristics of phase change thermal storage materials when a solid-liquid phase change occurs at a specific phase change temperature, accompanied by a large amount of heat absorption and release. It has the advantages of high thermal density, small volume, and small heat exchange temperature difference.

[0003] Existing technologies, such as the utility model patent with publication number CN214094685U, disclose a solar phase change heat storage heating system. This patent uses a floor layer, with a protective layer on top of the floor layer, and a concrete layer poured on top of the protective layer. A heat storage plate is installed inside the concrete layer, and circulating water pipes are placed around the heat storage plate. The protective layer is made of waterproof and heat-insulating materials. The bottom end of the circulating water pipes is in close contact with the heat storage plate. A wooden board layer is installed on top of the concrete layer. Both the inlet and outlet ends of the circulating water pipes are connected to an external solar water heater. This utility model device solves the problem that solar circulating water underfloor heating systems lack heat storage function and can only heat the floor when there is sunshine.

[0004] The inventors discovered in their daily work that the equipment consumed a lot of energy during use. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies where equipment cannot effectively utilize free solar energy, and to propose a solar phase change thermal storage heating system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: It includes a phase change heat storage box, with a heat storage outlet and a terminal water supply outlet at the upper end, and a heat storage inlet and a terminal return outlet on its lower surface. The heat storage outlet and the heat storage inlet are connected by a connecting pipe. A heat storage pump is installed on the surface of the connecting pipe near the heat storage inlet, and a flow switch is installed at the lower end of the heat storage pump. The terminal return outlet is connected to a terminal return pipe, and a terminal radiator is installed at the end of the terminal return pipe away from the heat storage pump. A terminal water supply pipe is installed at the upper end of the terminal radiator, and the end of the terminal water supply pipe away from the terminal radiator is connected to the terminal water supply outlet. The terminal water supply pipe is connected to a solar collector.

[0007] Furthermore, the surface of the terminal water supply pipe is provided with an outlet water temperature probe, and the surface of the terminal return water pipe is provided with a return water temperature probe.

[0008] Furthermore, the surface of the end return water pipe is connected to the solar collector, and a solar circulation pump is installed at the connection between the end return water pipe and the solar collector.

[0009] Furthermore, the terminal return water pipe is connected to the terminal water supply pipe at the connection point between the terminal return water pipe and the solar collector, and an empty water pipe is provided at the connection point between the terminal return water pipe and the solar collector and the terminal water supply pipe.

[0010] Furthermore, a drain valve is provided at one end of the drain pipe, and a water supply tank is provided at the other end of the drain valve.

[0011] Furthermore, a heat storage temperature probe 1 is installed on the upper surface of the phase change heat storage box near the heat storage outlet, and a heat storage temperature probe 2 is installed on the lower surface of the phase change heat storage box near the heat storage inlet.

[0012] Furthermore, the phase change heat storage box has an insulation layer on its surface, a load-bearing base plate on the lower surface of the insulation layer, and an internal heating tube inside the phase change heat storage box.

[0013] Furthermore, a water temperature detector is installed at the upper end of the heat storage outlet, a water temperature probe is installed on the surface of the end water supply pipe, and a return water temperature probe is installed on the surface of the end return water pipe.

[0014] Furthermore, a mixing pipe is used to connect the terminal water supply pipe and the terminal water return pipe, and a mixing valve is provided at the connection between the mixing pipe and the terminal water supply pipe.

[0015] Furthermore, a heating pump is installed on the surface of the terminal water supply pipe, and a first check valve is installed on the surface of the terminal water supply pipe.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] When using this utility model equipment, a flow switch and a heat storage pump are installed between the heat storage inlet and outlet. This set of pipes is used for heat storage circulation. A mixing valve is connected to the electric three-way valve towards the end, and the mixing valve is connected to the system return water pipe. A heat pump is installed between the mixing valve and the end. A water pipe leading to the solar collector is connected between the end water supply and return water. A solar circulation pump and a drain valve are installed on the return water pipe. At night and on cloudy or snowy days, the water in the solar collector is returned to the water replenishment tank.

[0018] There are two modes. The first mode is electric heating. When used on cloudy days, the solar collectors in the equipment have reduced efficiency in collecting sunlight and cannot collect and convert heat energy. The equipment then starts to use electricity to heat the built-in heating tubes inside the phase change heat storage box. The second mode is solar heating. When there is sufficient sunshine, the solar collectors in the equipment operate, converting solar thermal radiation into heat energy to directly supply the heating terminals. When needed, the heat is released to heat the room. The equipment mainly combines solar thermal collection and phase change heat storage. When there is sufficient sunshine, solar thermal collection provides heat to the terminals, making full use of free energy and reducing heating operating costs for users. Attached Figure Description

[0019] Figure 1 This utility model provides a schematic diagram of the overall distribution structure of a solar phase change thermal storage heating system;

[0020] Figure 2 This invention provides a schematic diagram of the power control distribution for a solar phase change thermal storage heating system.

[0021] Legend: 101. Phase change thermal storage tank; 102. Thermal storage outlet; 103. Terminal water supply outlet; 104. Thermal storage inlet; 105. Terminal return outlet; 106. Hot water storage pump; 107. Heating pump; 108. Flow switch; 109. Mixing valve; 110. Mixing pipe; 111. Connecting pipe; 112. Terminal water supply pipe; 113. Terminal return pipe; 114. First check valve; 115. Load-bearing base plate; 116. Insulation layer; 117. Built-in heating element; 118. 1. Water supply tank; 201. Thermal storage temperature probe 1; 202. Thermal storage temperature probe 2; 203. Water temperature detector; 204. Outlet water temperature probe; 205. Return water temperature probe; 301. Solar circulation pump; 302. Second check valve; 303. Solar water temperature probe; 304. Drain valve; 305. Solar collector; 306. Drain pipe; 400. Electrical control unit; 401. Circuit breaker; 402. AC contactor; 404. Control main board; 501. Terminal radiator. Detailed Implementation

[0022] Please see Figure 1-2 This utility model provides a technical solution: a solar phase change heat storage heating system, including a phase change heat storage box 101, and an insulation layer 116 is provided on the surface of the phase change heat storage box 101.

[0023] The following section will describe the specific setup and function of a solar phase change thermal storage heating system.

[0024] In this embodiment, a load-bearing base plate 115 is provided on the lower surface of the insulation layer 116. The insulation layer 116 provided in the phase change heat storage box 101 can not only protect the body of the phase change heat storage box 101, but also retain the heat inside the phase change heat storage box 101, reducing the rapid loss of heat. The phase change heat storage box 101 is equipped with a built-in heating tube 117. The upper end of the phase change heat storage box 101 is provided with a heat storage outlet 102 and a terminal water supply port 103. The lower end surface of the phase change heat storage box 101 is provided with a heat storage inlet 104 and a terminal return water port 105. A heat storage temperature probe 201 is provided at the upper end of the phase change heat storage box 101 near the heat storage outlet 102. The heat storage temperature probe 201 can monitor the water temperature flowing out of the phase change heat storage box 101 in real time. A heat storage temperature probe 202 is provided at the lower end of the phase change heat storage box 101 near the heat storage inlet 104.

[0025] A connecting pipe 111 connects the heat storage outlet 102 and the heat storage inlet 104. A heat storage pump 106 is installed at one end of the connecting pipe 111 near the heat storage inlet 104. A flow switch 108 is installed at the lower end of the heat storage pump 106. The flow switch 108 is used to control the water flow inside the connecting pipe 111. The flow switch 108 is installed on the connecting pipe 111. A water temperature detector 203 is installed at the upper end of the heat storage outlet 102 to sense and detect the water temperature at the location of the heat storage outlet 102. The end return port 105 is connected to the return pipe 113.

[0026] A terminal radiator 501 is installed at the end of the terminal return water pipe 113 away from the hot water storage pump 106. The terminal radiator 501 can dissipate the heat in the water flow inside the equipment to heat the room. A terminal supply water pipe 112 is installed at the upper end of the terminal radiator 501. The end of the terminal supply water pipe 112 away from the terminal radiator 501 is connected to the terminal water supply port 103. The terminal supply water pipe 112 and the terminal return water pipe 113 are connected by a mixing pipe 110. A mixing valve 109 is installed at the connection between the mixing pipe 110 and the terminal supply water pipe 112. The mixing valve 109 is designed to connect the terminal supply water pipe 112 and the terminal return water pipe 113 to facilitate water circulation.

[0027] Specifically, a water outlet temperature probe 204 is installed on the end water supply pipe 112, and a water return temperature probe 205 is installed on the end return water pipe 113. The water outlet temperature probe 204 and the water return temperature probe 205 are electrically connected to the electrical control unit 400, which includes a control main board 404, a circuit breaker 401, and an AC contactor 402.

[0028] Specifically, a heating pump 107 is installed on the surface of the terminal water supply pipe 112, and a first check valve 114 is installed on the surface of the terminal water supply pipe 112. The function of the first check valve 114 is to prevent the water flow inside the pipe from flowing backward.

[0029] Specifically, the terminal water supply pipe 112 is directly connected to the solar collector 305. The connection between the terminal water supply pipe 112 and the solar collector 305 is equipped with a second check valve 302 and a solar water temperature probe 303. The solar water temperature probe 303 can detect the water temperature in the solar collector.

[0030] Specifically, the end return water pipe 113 is connected to the solar collector 305, and a solar circulation pump 301 is installed at the connection between the end return water pipe 113 and the solar collector 305. The solar circulation pump 301 can circulate the water in the end through the solar collector 305.

[0031] Specifically, the terminal return water pipe 113 is connected to the solar collector 305 at the connection point with the terminal water supply pipe 112, and an empty water pipe 306 is provided at the connection point between the terminal return water pipe 113 and the solar collector 305 and the terminal water supply pipe 112.

[0032] Specifically, a drain valve 304 is installed at one end of the drain pipe 306, and a water supply tank 118 is installed at the other end of the drain valve 304. The drain valve 304 can drain the water inside the pipe.

[0033] Working principle: A flow switch 108 and a hot water pump 106 are installed between the heat storage inlet 104 and the heat storage outlet 102. This piping is used for heat storage circulation. A mixing valve 109 is connected to the electric three-way valve towards the end, and the mixing valve 109 is connected to the system return water pipe. A heating pump 107 is installed between the mixing valve 109 and the end. A water pipe leading to the solar collector 305 is connected between the end water supply pipe 112 and the end return water pipe 113. A solar circulation pump 301 and a drain valve 304 are installed on the end return water pipe 113. This system is used for nighttime and cloudy / snowy weather. During solar energy operation, the water in the solar collector 305 is returned to the water supply tank 118. During the solar energy operation period, the heating pump 107 is de-energized and stops, the built-in heating tube 117 is de-energized and stops heating, the hot water storage pump 106 is de-energized, and the solar circulation pump 301 is turned on. The low-temperature water returning from the heating terminal through the terminal return water pipe 113 is sent to the solar collector 305 through the solar circulation pump 301. After solar energy collection, it is sent to the heating terminal through the terminal supply water pipe 112. During non-solar energy periods, the solar circulation pump 301 is de-energized and stops, and the vent valve 304 is opened to vent.

[0034] The above description is only used to illustrate the technical solution of this utility model, and is not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Any equivalent structural or procedural transformations made using the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A solar phase change thermal storage heating system comprising a phase change thermal storage tank (101), characterized in that: The upper end of the phase change heat storage tank (101) is provided with a heat storage outlet (102) and a terminal water supply outlet (103), and the lower end is provided with a heat storage inlet (104) and a terminal return water outlet (105), the heat storage outlet (102) and the heat storage inlet (104) are communicated by a communication pipe (111), one end surface of the communication pipe (111) close to the heat storage inlet (104) is provided with a heat storage water pump (106), the lower end of the heat storage water pump (106) is provided with a water flow switch (108), the terminal return water outlet (105) is communicated with a terminal return water pipe (113), one end of the terminal return water pipe (113) away from the heat storage water pump (106) is provided with a terminal radiator (501), the upper end of the terminal radiator (501) is provided with a terminal water supply pipe (112), one end of the terminal water supply pipe (112) away from the terminal radiator (501) is communicated with the terminal water supply outlet (103), the terminal water supply pipe (112) is communicated with a solar heat collector (305).

2. The solar energy phase change heat storage heating system according to claim 1, characterized in that: The terminal water supply pipe (112) is communicated with the solar heat collector (305), and a second check valve (302) and a solar water temperature probe (303) are arranged at the communication position.

3. The solar energy phase change heat storage heating system according to claim 1, characterized in that: The surface of the terminal return water pipe (113) is communicated with the solar heat collector (305), and a solar circulation pump (301) is arranged at the communication position of the terminal return water pipe (113) and the solar heat collector (305).

4. The solar energy phase change heat storage heating system according to claim 3, characterized in that: The terminal return water pipe (113) is connected with the terminal water supply pipe (112) at the communication position with the solar heat collector (305), and an emptying water pipe (306) is arranged at the communication position of the terminal return water pipe (113), the solar heat collector (305) and the terminal water supply pipe (112).

5. The solar energy phase change heat storage heating system according to claim 4, characterized in that: One end of the emptying water pipe (306) is provided with an emptying valve (304), and one end of the emptying valve (304) is provided with a water supplement tank (118).

6. The solar energy phase change heat storage heating system according to claim 1, characterized in that: The surface of the upper end of the phase change heat storage tank (101) is provided with a heat storage temperature probe one (201) close to the heat storage outlet (102), and the surface of the lower end of the phase change heat storage tank (101) is provided with a heat storage temperature probe two (202) close to the heat storage inlet (104).

7. The solar energy phase change heat storage heating system according to claim 1, characterized in that: The surface of the phase change heat storage tank (101) is provided with a heat preservation layer (116), the lower surface of the heat preservation layer (116) is provided with a load-bearing bottom plate (115), and the phase change heat storage tank (101) is internally provided with a built-in heating pipe (117).

8. The solar energy phase change heat storage heating system according to claim 1, characterized in that: The upper end of the heat storage outlet (102) is provided with a water temperature probe (203), the surface of the terminal water supply pipe (112) is provided with an outlet water temperature probe (204), and the surface of the terminal return water pipe (113) is provided with a return water temperature probe (205).

9. The solar energy phase change heat storage heating system according to claim 1, characterized in that: The terminal water supply pipe (112) and the terminal return water pipe (113) are communicated by using a mixing water pipe (110), and the mixing water pipe (110) is provided with a mixing water valve (109) at the connection position with the terminal water supply pipe (112).

10. The solar energy phase change heat storage heating system according to claim 1, characterized in that: The surface of the terminal water supply pipe (112) is provided with a heating pump (107), and the surface of the terminal water supply pipe (112) is provided with a first check valve (114).

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