Solar energy-inorganic molten salt water heater

Abstract

The utility model discloses a solar energy-inorganic molten salt water heater. The device comprises an inorganic molten salt tank, a plunger valve, a water tank, a liquid inlet, a liquid outlet, a water storage tank, a fixed sleeve, a supporting frame, a movable lantern ring, a connecting rod, a solar heat collecting plate and an angle adjusting structure. The design purpose of the solar energy-inorganic molten salt water heater is to utilize solar energy to carry out efficient heat energy storage and release so as to realize effective utilization of the solar energy and stable supply of heat. According to the basic idea of the device, light energy is collected and converted into heat energy, heat is stored and released through the phase change heat effect of molten salt, and therefore hot water supply is achieved.

Description

Technical Field

[0001] The utility model relates to the field of energy conservation, in particular to a solar energy-inorganic molten salt water heater. Background Art

[0002] The use of solar water heaters has become quite popular. However, by analyzing the problems of current solar energy devices, we found that the solar energy equipment on the market currently has low efficiency in absorbing solar energy and can only absorb a small part of the solar energy during the day. The energy supply is not stable. At the same time, traditional solar water heaters cannot store heat for a long time. Therefore, we designed a solar-inorganic molten salt water heater to improve the absorption efficiency of solar energy during the day through solar collectors, so that as much sunlight as possible can be captured during the process of the sun rising in the east and setting in the west. By heating the inorganic molten salt with the heat of the solar energy, stable heat storage and heating can be achieved. Summary of the invention

[0003] The purpose of the utility model is to provide a solar-inorganic molten salt water heater to solve the problems raised in the above background technology. The utility model adopts the following technical solutions:

[0004] A solar-inorganic molten salt water heater, characterized in that: the water heater comprises a double-layer stainless steel tank, the double-layer stainless steel tank comprises an external inorganic molten salt tank and an internal nested water tank, the inorganic molten salt tank is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are respectively connected to a liquid inlet pipe and a connecting pipe, the inorganic molten salt tank is provided with a plunger valve, the inorganic molten salt tank is nested with a water tank, the internal nested water tank is connected with a liquid inlet pipe and a connecting pipe, the liquid inlet pipe is connected to a tap water pipe, the connecting pipe is connected to the liquid inlet of a water storage tank, the water storage tank is provided with a liquid outlet pipe connected to a user end, the double-layer stainless steel tank is sleeved with a fixed sleeve, a support frame is fixedly installed on the inorganic molten salt tank, and a solar collector plate is fixedly installed on the support frame.

[0005] Furthermore, the middle part of the solar heat collecting plate is arc-shaped, and its length and width are longer than the double-layer stainless steel tank.

[0006] Furthermore, the two sides of the solar heat collecting plate are flat plates, which can be folded inwards to completely cover the double-layer stainless steel tank.

[0007] Furthermore, the solar collector plate is made of aluminum alloy.

[0008] Furthermore, the water storage tank is made of a double-layer plastic shell, which is filled with polyurethane foam boards.

[0009] Furthermore, the support frame is made of stainless steel.

[0010] This device aims to solve the problems of existing solar water heaters and provides a solar-inorganic molten salt water heater device. The device reflects light energy through solar collectors. After the inorganic molten salt absorbs solar energy, its temperature rises and a phase change occurs. The heat is stored in the form of phase change heat from solid phase to liquid phase. At night, the inorganic molten salt solidifies from liquid phase to solid phase, releasing heat. The temperature of the inorganic salt decreases and returns to solid phase. The water in the water tank absorbs heat, the water temperature rises, and is transported to the user end, achieving the effect of a water heater.

[0011] The utility model has a simple structure, utilizes the latent heat stored by the phase change of inorganic molten salt to achieve the effect of long-term heat storage, avoids the intermittent use of solar energy, and heats water by inorganic molten salt, so that the heating is not limited by time and weather.

[0012] This device uses solar energy as its energy source, which is clean and environmentally friendly, and complies with the principles of green emission reduction, energy saving and low carbon. The inorganic molten salt can be recycled and reused after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the solar-inorganic molten salt water heater of the utility model.

[0014] Figure 2 It is a schematic diagram of the fixed sleeve of the solar-inorganic molten salt water heater of the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the liquid inlet and liquid outlet pipe of the water storage tank of the solar-inorganic molten salt water heater of the utility model.

[0016] Figure 4 This is a schematic diagram of the double-layer stainless steel tank structure of the utility model solar-inorganic molten salt water heater.

[0017] In the figure, 1. Inorganic molten salt tank 2. Fixed casing 3. Solar collector plate 4. Water storage tank 5. Connecting pipe 6. Liquid outlet pipe 7. Liquid inlet pipe 8. Support frame 9. Plunger valve 10. Water tank. DETAILED DESCRIPTION

[0018] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. As long as they are within the spirit of the utility model, the modifications to the following embodiments belong to the scope of the claims of the utility model.

[0019] The working principle of the utility model is as follows: the device reflects light energy through the solar collector plate. After the inorganic molten salt absorbs the solar energy, the temperature rises and a phase change occurs, and the heat is stored in the form of phase change heat from the solid phase to the liquid phase. At night, the inorganic molten salt solidifies from the liquid phase to the solid phase, releasing heat, and the temperature of the inorganic salt decreases and returns to the solid phase. The water in the water tank absorbs the heat, the water temperature rises, and is transported to the user end, achieving the effect of a water heater.

[0020] The selection of inorganic molten salts should comply with the following conditions: moderate phase change temperature, high latent heat of phase change, no drastic changes in volume and pressure after phase change, high melting enthalpy, and high thermal conductivity. For example, under normal pressure, Hitec salt phase changes at 137-145°C, and solar concentrators can reach up to 400°C, which can fully meet the conditions.

[0021] When the device heats a liquid, the liquid to be heated is first passed through a hydraulic valve into an inner water tank of a multi-layer stainless steel tank, and then the solar concentrator collects heat in the double-layer stainless steel tank. The solid inorganic molten salt absorbs solar energy, and the temperature of the solid inorganic molten salt rises, a phase change reaction occurs, and heat is generated, and the heat is transferred to the inner water tank. The cold water in the inner water tank absorbs the heat and the temperature rises, thereby achieving the purpose of heating. Then, the hot water will flow into an external water storage tank through the liquid outlet, and the hot water will be stored in the external water storage tank for use when needed.

[0022] Further, the multi-layer stainless steel tank is a double-layer stainless steel tank. The position arrangement of the liquid material input and output ports of such double-layer stainless steel tanks, namely the liquid inlet and the liquid outlet, has high flexibility, and they can be configured on the side or end of the stainless steel tank body according to needs. Ideally, both interfaces are located at the end of the tank body and below the end. At this time, a metal partition is added to separate the liquid inlet and the liquid outlet, which is conducive to managing the flow path of the fluid. When pursuing to improve the heat exchange efficiency, materials with good thermal conductivity such as pure copper or different types of stainless steel can be selected to make support frames and insulation boards. Another preferred solution is to place the liquid inlet below the end of the tank body and the liquid outlet above, and the two are connected by a metal support frame with holes. Such a layout helps to promote the circulation of the internal fluid. In this case, efficient thermal conductive materials such as pure copper or stainless steel can also be used to construct a metal support frame with holes to enhance the overall heat conduction effect.

[0023] Furthermore, the solar concentrator plate is in an arc shape, and this structure is more suitable for concentrating light.

[0024] Furthermore, the length of the solar concentrator panel is longer than the multi-layer stainless steel tank.

[0025] Furthermore, the flat plates on both sides of the arc of the solar collector plate can be folded upward to block the sunlight, thus preventing the inorganic salt from being overheated and causing danger.

[0026] The outer layer of the double-layer stainless steel tank is an inorganic molten salt tank where phase change reaction occurs, and the inner layer is filled with water. The inner and outer layers are supported by a metal bracket with holes. There is a plunger valve on the surface of the outer inorganic molten salt tank. After the inorganic molten salt has been used for a period of time, the plunger valve can be opened to release the inorganic molten salt, and new inorganic molten salt can be added through the plunger valve port.

[0027] When the water heater does not produce hot water, the inner water tank is not filled with water; when hot water is supplied, cold water is injected from the water inlet, and the fully sealed non-porous partition allows the water to flow to the other side only after the water injection side is filled, so that the cold water is fully heated and then flows out of the hot water from the liquid outlet. During the day, the solar concentrator collects heat in the double-layer stainless steel tank, and the heat is transferred to the inorganic molten salt through the metal tank. After the inorganic molten salt tank is fully heated, the inorganic molten salt begins to undergo a phase change reaction to store heat, and at the same time, part of the heat is transferred to the inner water tank. At night, the inorganic molten salt solidifies from the liquid phase to the solid phase, and this process releases heat, which heats the cold water into hot water. The hot water flows into the external water storage tank through the liquid outlet. In order to maintain the temperature of the hot water, the water storage tank is made of a preferred insulation material. When residents use the water heater, hot water will flow out of the liquid outlet of the water storage tank and flow into the user end to realize the supply of hot water.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solar-inorganic molten salt water heater, characterized in that: The water heater comprises a double-layer stainless steel tank, the double-layer stainless steel tank comprising an external inorganic molten salt tank (1) and an internal nested water tank (10), the inorganic molten salt tank being provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet being connected to a liquid inlet pipe (7) and a connecting pipe (5) respectively, the inorganic molten salt tank being provided with a plunger valve (9), the inorganic molten salt tank being internally nested with a water tank (10), the internally nested water tank being connected to the liquid inlet pipe (7) and the connecting pipe (5), the liquid inlet pipe (7) being connected to a tap water pipe, the connecting pipe (5) being connected to the liquid inlet of a water storage tank (4), the water storage tank (4) being provided with a liquid outlet pipe (6) connected to a user end, the double-layer stainless steel tank being sleeved with a fixed sleeve (2), the inorganic molten salt tank being fixedly mounted with a support frame (8), the support frame being fixedly mounted with a solar collector plate (3).

2. The solar-inorganic molten salt water heater according to claim 1, characterized in that: The middle part of the solar heat collecting plate (3) is arc-shaped, and its length and width are both longer than the double-layer stainless steel tank.

3. The solar-inorganic molten salt water heater according to claim 2, characterized in that: The solar heat collecting plate (3) has flat plates on both sides, which can be folded inwards to completely cover the double-layer stainless steel tank.

4. The solar-inorganic molten salt water heater according to claim 2, characterized in that: The solar thermal collector plate (3) is made of aluminum alloy.

5. The solar-inorganic molten salt water heater according to claim 1, characterized in that: The water storage tank (4) is made of a double-layer plastic shell, the interior of which is filled with polyurethane foam boards.

6. The solar-inorganic molten salt water heater according to claim 1, characterized in that: The support frame (8) is made of stainless steel.

Images