Phase change geothermal floor

Abstract

The utility model discloses a kind of phase change geothermal floor, including floor body, the floor body sequentially includes waterproof layer, decorative layer, substrate layer and heat insulation layer from top to bottom;Multiple parallel through hole structures are equipped in the substrate layer inside;Metal pipe is closely adapted in the through hole structure;Each the metal pipe is equipped with heating wire, and phase change material particles are also filled in metal pipe;Public plug and female plug connected with heating wire are respectively equipped in the both ends of floor body.

Description

Technical Field

[0001] This utility model relates to a floor, specifically a phase change geothermal floor, belonging to the technical field of geothermal flooring for building decoration. Background Technology

[0002] With the continuous improvement of living standards, geothermal heating systems have gradually become a popular choice in modern homes due to their significant advantages of comfort, energy efficiency, and space-saving design. Traditional geothermal floors mostly use technologies such as water heating or electric heating films, which heat the concrete filling layer or air medium and then transfer heat to the room through radiation and convection. However, this method also has certain drawbacks—relatively high thermal inertia, slow heating rate, high overall energy consumption, and the tendency for uneven indoor temperature distribution; more importantly, if the power supply is interrupted, the insulation capacity of traditional systems will weaken rapidly, which may cause a significant drop in indoor temperature in a short period of time, affecting user comfort.

[0003] On the other hand, stone-plastic composite (SPC) flooring, as an emerging environmentally friendly flooring material in recent years, has been widely used in underfloor heating scenarios due to its excellent waterproof and moisture-proof performance, formaldehyde-free safety characteristics, and good dimensional stability. However, a drawback is that existing SPC underfloor heating flooring usually does not have an active heating function and still needs to rely on the underlying heating system. This increases the complexity of the installation process to some extent and places higher demands on the construction techniques.

[0004] In addition, although some floor products with built-in electric heating functions have appeared on the market, their designs mostly use the method of directly embedding the heating wire into the substrate. In practical applications, this can easily expose problems such as limited heat dissipation efficiency, local areas may overheat and deform due to concentrated temperature, insufficient thermal stability over long-term use, and unsatisfactory energy consumption control. Utility Model Content

[0005] The purpose of this invention is to provide a phase change geothermal floor. This invention integrates a self-heating floor structure with efficient, uniform heating and heat storage functions, enabling rapid heating and continuous heat preservation after power failure, simplifying the installation process, and facilitating the replacement and maintenance of individual floor panels.

[0006] The technical solution of this utility model is as follows: A phase change geothermal floor includes a floor body, which comprises, from top to bottom, a waterproof layer, a decorative layer, a substrate layer, and a heat insulation layer; the substrate layer has a plurality of parallel through-hole structures inside; metal tubes are tightly fitted inside the through-hole structures; each metal tube contains a heating wire and is also filled with phase change material particles; male plugs and female plugs connected to the heating wires are respectively provided at both ends of the floor body.

[0007] In the aforementioned phase change geothermal floor, the two ends of the floor body are respectively provided with a first end cap and a second end cap.

[0008] In the aforementioned phase change geothermal floor, the male plug includes multiple first terminals disposed inside the first end cover and a plug disposed outside the first end cover. The first terminals are electrically connected to the heating wire and the plug, respectively.

[0009] In the aforementioned phase change geothermal floor, the female plug includes multiple second terminals disposed inside the second end cover and a plug slot adapted to the plug connector. The second terminals are electrically connected to the plug slot and the heating wire, respectively.

[0010] In the aforementioned phase change geothermal floor, the waterproof layer is a wear-resistant and waterproof coating with an anti-slip texture on the surface, and the anti-slip texture is distributed in a wavy shape.

[0011] In the aforementioned phase change geothermal floor, the decorative layer is made of heat-transfer wood grain paper with a PET protective film.

[0012] In the aforementioned phase change geothermal floor, the outer wall of the metal pipe is tightly fitted to the inner wall of the pore structure of the substrate layer, and the axial length of the metal pipe is consistent with the length of the substrate layer.

[0013] In the aforementioned phase change geothermal floor, the heat insulation layer is made of polyurethane foam insulation material.

[0014] In the aforementioned phase change geothermal floor, the substrate layer is a stone-plastic substrate layer.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The heat generated by the heating wire in this invention is efficiently conducted through a metal tube, which evenly distributes the heat throughout the entire substrate layer, preventing localized overheating. Simultaneously, the phase change material particles filled within the tube melt and store heat when heated, slowly releasing latent heat after power is cut off. This maintains the floor surface temperature for an extended period, significantly improving thermal stability and comfort, and solving the problems of slow heating and rapid cooling after power outages in traditional underfloor heating systems. Furthermore, the male and female plugs on both sides of the floor allow for quick series connection of the floorboards. The installation process is similar to assembling ordinary click-lock floorboards, eliminating the need for complex underfloor wiring. When a heating unit in a floorboard malfunctions, only that single floorboard needs to be replaced, without damaging the entire floor, greatly reducing maintenance difficulty and costs. Attached Figure Description

[0016] Figure 1 This is the front view of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 What is shown is Figure 1 A magnified view of part A shown; Figure 4 What is shown is Figure 1 A magnified view of part B shown.

[0017] The markings in the attached diagram are as follows: 1. Waterproof layer; 2. Decorative layer; 3. Substrate layer; 4. Thermal insulation layer; 5. Metal tube; 6. Heating wire; 7. Male plug; 701. First terminal; 702. Plug; 8. Female plug; 801. Second terminal; 802. Plug groove; 9. First end cap; 10. Second end cap. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0019] Example: A phase change geothermal floor, configured as follows Figure 1 As shown, the flooring includes the floor body, which from top to bottom comprises a waterproof layer 1, a decorative layer 2, a substrate layer 3, and a thermal insulation layer 4. The waterproof layer 1 is a wear-resistant and waterproof coating with an anti-slip textured surface, the texture being wavy. The waterproof layer 1 uses a 0.3mm thick polyvinyl chloride (PVC) waterproof membrane with an IPX7 waterproof rating, preventing moisture or cleaning water from penetrating the floor and avoiding short circuits or material damage from moisture. It can also withstand temperature changes in geothermal environments from -20℃ to 80℃, preventing high-temperature deformation or low-temperature cracking. The decorative layer 2 uses 0.15mm thick heat-transfer wood grain paper (laminated with a PET protective film), simulating the texture of natural wood to meet interior decoration style requirements. The PET protective film enhances surface wear resistance and scratch resistance, resisting daily wear and tear. The substrate layer 3 is made of pressed stone-plastic material. The substrate layer 3, serving as the core load-bearing layer of the floor, provides sufficient bending strength (≥15MPa) to resist deformation under foot traffic. The composite structure of stone powder and PVC has better thermal conductivity than traditional plastics, enabling rapid heat transfer to the surface. The thermal insulation layer 4 uses polyurethane foam insulation material, which serves two purposes: firstly, it blocks heat from flowing downwards to the ground (reducing ineffective heat loss) and concentrates heat upwards into the room; secondly, it insulates the floor from the effects of low ground temperatures, preventing the coldness at the bottom of the floor from offsetting the heat at the top. Figure 2As shown, the substrate layer 3 has four parallel through-hole structures. Utilizing the co-extrusion process and the inherent plasticity of the stone-plastic material, different shapes and specifications of hole structures can be precisely manufactured. The shapes of the hole structures can be polygonal prisms or cylinders, etc., and the axes of all holes are parallel to the length of the floor body. A metal tube 5 is tightly fitted inside the hole structure. The outer wall of the metal tube 5 is tightly fitted to the inner wall of the hole structure in the substrate layer 3, and the axial length of the metal tube 5 is consistent with the length of the substrate layer 3. The metal tube 5 is made of copper, and each metal tube 5 contains a heating wire 6, which is a 0.5mm diameter nickel-chromium alloy heating wire. Each metal tube 5 is also filled with the heating wire 6 and phase change material particles. The metal tube 5 encloses the heating wire and phase change material to prevent the heating wire from directly contacting the substrate layer 3 (to prevent wear) and to prevent leakage after the phase change material melts. The floor panel has a first end cap 9 and a second end cap 10 at each end. A male plug 7 and a female plug 8, connected to a heating wire 6, are located at each end of the floor panel. The male plug 7 includes multiple first terminals 701 located inside the first end cap 9 and connectors 702 located outside the first end cap 9. The first terminals 701 are electrically connected to the heating wire 6 and the connectors 702, respectively. The female plug 8 includes multiple second terminals 801 located inside the second end cap 10 and insertion slots 802 adapted to the connectors 702. The second terminals 801 are electrically connected to the insertion slots 802 and the heating wire 6, respectively. Therefore, during installation, only the male plugs 7 and female plugs 8 on both sides of the floor panel need to be plugged in, eliminating the need for complex underground wiring. When the heating unit of a floor panel malfunctions, only that single floor panel needs to be replaced, without damaging the entire floor, greatly reducing maintenance difficulty and cost. Furthermore, it ensures a stable splicing structure and reliable electrical connection, preventing heating malfunctions due to loosening after long-term use. The phase change material (PCM) particles are paraffin-based and commercially available. These PCM particles can absorb or release heat within a specific temperature range, enabling dynamic regulation of ambient temperature. Combining PCM with SPC flooring retains the mechanical properties and environmental advantages of SPC flooring while significantly improving its thermal performance, giving it temperature regulation capabilities, and enhancing energy efficiency. Therefore, developing a SPC geothermal flooring that is simple in structure, easy to install, provides stable heating, possesses phase change heat storage capabilities, and fully leverages the rapid thermal conductivity and plasticity of SPC flooring is of great significance for promoting building energy conservation and improving the thermal comfort of human living environments.

[0020] During floor installation, multiple floorboards are spliced ​​together one by one using male and female plugs 8, forming a complete series circuit of heating wires 6 within the floorboards. After splicing, the plugs at the beginning and end are connected to the main control junction box. The main control junction box is equipped with a thermostat and a leakage protection device. The thermostat is connected to a temperature sensor through a reserved sensor interface to monitor the temperature of the phase change material particles in real time and automatically control the start and stop of the heating wires 6. By utilizing the rapid heat conduction characteristics of the substrate layer 3 and the heat storage characteristics of the phase change material particles, a rapid heating and stable temperature control effect is achieved, ensuring that the indoor temperature is maintained within a comfortable range.

[0021] Work process During installation, multiple floorboards are connected one by one through the connector 702 of the male plug 7 and the slot 802 of the female plug 8. The first terminal 701 in each floorboard and the second terminal 801 of the adjacent floorboard automatically make contact and conduct electricity, so that all heating wires 6 form a series circuit through the preset wires in the end cap. Finally, the first and last plugs of each series circuit are connected to the main control junction box. The leakage protection device in the junction box is activated, completing the construction of the safety circuit. At the same time, the waterproof layer 1 (0.3mm PVC waterproof membrane) isolates the ground moisture and avoids the risk of short circuit.

[0022] After the main control system is started, the current is input to the heating wire connected in series through the junction box. The nickel-chromium alloy heating wire is energized and heats up. The heat is quickly conducted to the substrate layer 3 through the metal tube 5, and the heat can be quickly diffused to the entire substrate layer.

[0023] When heat is conducted to the phase change material particles inside the metal tube 5, if the temperature reaches its phase change temperature range of 40-60℃, the phase change material particles absorb heat and change from solid to liquid, storing the heat in the form of latent heat. During this process, the temperature sensor in the main control junction box monitors the temperature of the phase change material particles in real time. When the heat storage reaches saturation (temperature close to 60℃), the thermostat automatically cuts off the power supply to the heating wire, reducing the frequency of heating system start-up and shutdown, and achieving energy saving.

[0024] The heat from the substrate layer 3 is transferred upwards to the decorative layer 2 and eventually released into the room to raise the room temperature. Simultaneously, the thermal insulation layer 4 prevents heat loss downwards, ensuring concentrated upward heat transfer and reducing ineffective energy consumption. When indoor heating demand is suspended or the central control system detects that the room temperature has reached the target, the heating wire stops working. At this time, the phase change material particles, which have stored latent heat, change from liquid to solid, slowly releasing heat. Combined with the thermal conductivity of the substrate layer 3, this maintains a stable indoor temperature and prevents a sudden drop in room temperature.

[0025] The temperature sensor continuously monitors the temperature of the phase change material particles. When the temperature drops to the lower limit of the phase change temperature (about 40°C), the thermostat automatically restarts the heating wire and repeats the "heating-heat storage-heat release" cycle to keep the indoor temperature within a comfortable range. At the same time, the mechanical properties of the substrate layer 3 (bending strength ≥15MPa) ensure that the floor does not deform under alternating hot and cold conditions, ensuring long-term stable operation.

[0026] In summary, this utility model integrates a self-heating floor structure with efficient, uniform heating and heat storage functions, enabling rapid heating and continuous heat preservation after power failure, simplifying the installation process, and facilitating the replacement and maintenance of individual floorboards.

Claims

1. A phase change geothermal floor, characterized in that: The floor body includes a waterproof layer (1), a decorative layer (2), a substrate layer (3), and a heat insulation layer (4) from top to bottom. The substrate layer (3) has multiple parallel through-hole structures inside. A metal tube (5) is tightly fitted inside the through-hole structure. Each metal tube (5) is equipped with a heating wire (6) and is also filled with phase change material particles. At both ends of the floor body, there are male plugs (7) and female plugs (8) connected to the heating wires (6).

2. The phase change geothermal floor according to claim 1, wherein: The floor body is provided with a first end cap (9) and a second end cap (10) at both ends.

3. The phase change geothermal floor according to claim 2, wherein: The male plug (7) includes a plurality of first terminals (701) disposed inside the first end cover (9) and a plug (702) disposed outside the first end cover (9). The first terminals (701) are electrically connected to the heating wire (6) and the plug (702) respectively.

4. The phase change geothermal floor according to claim 2, wherein: The female plug (8) includes a plurality of second terminals (801) disposed inside the second end cover (10) and a plug slot (802) adapted to the plug (702). The second terminals (801) are electrically connected to the plug slot (802) and the heating wire (6) respectively.

5. The phase change geothermal floor according to claim 1, wherein: The waterproof layer (1) is a wear-resistant waterproof coating with anti-slip texture on the surface, and the anti-slip texture is distributed in a wavy shape.

6. The phase change geothermal floor according to claim 1, wherein: The decorative layer (2) is made of heat-transfer wood grain paper with a PET protective film.

7. The phase change geothermal floor according to claim 1, wherein: The outer wall of the metal tube (5) is closely fitted with the inner wall of the pore structure of the substrate layer (3), and the axial length of the metal tube (5) is consistent with the length of the substrate layer (3).

8. The phase change geothermal floor according to claim 1, wherein: The heat insulation layer (4) is made of polyurethane foam insulation material.

9. The phase change geothermal floor according to claim 1, wherein: The substrate layer (3) is a stone-plastic substrate layer (3).

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