Thermoelectric power generation device capable of prolonging power supply

Abstract

The invention discloses a thermoelectric power generation device capable of prolonging power supply. According to the thermoelectric power generation device, a top surface thermoelectric power generation sheet is hermetically mounted at the top of a square shell, and side surface thermoelectric power generation sheets are hermetically mounted on the periphery of the shell; a phase change material is filled in a hollow cavity between the shell and the top surface thermoelectric power generation sheet and between the shell and the side surface thermoelectric power generation sheet; the shell is provided with a central bulge which is recessed into the hollow cavity from the bottom surface; a hollow circuit mounting chamber is formed in the central bulge; the circuit mounting chamber is provided with an opening at the bottom of the shell; the top of the central bulge is used for supporting the top surface thermoelectric power generation sheet; the energy storage battery is mounted in the circuit mounting chamber; the energy storage battery is electrically connected with the top surface thermoelectric power generation sheet and the side surface thermoelectric power generation sheet, and is used for storing electric energy generated by the top surface thermoelectric power generation sheet and the side surface thermoelectric power generation sheet. The thermoelectric power generation device can maintain the temperature difference for a long time and improve the long-time power supply capability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new energy energy collection, and particularly relates to a temperature difference power generation device capable of prolonging power supply. BACKGROUND

[0002] Most of the current electrical equipment still needs external power supply, or is always connected to the power supply, or is regularly charged with a battery, or is replaced with a new device after one-time power consumption, and it is difficult to obtain stable power supply without relying on external power supply. Converting the widely existing energy in the environment into electrical energy to power the device provides a new idea for device power supply. Temperature difference energy is a ubiquitous form of energy, for example, long-term exposure to sunlight will produce a hot side, and the opposite side with lower temperature will produce a temperature difference, and electrical energy can be obtained by using temperature difference power generation technology.

[0003] Most of the existing temperature difference power generation devices directly utilize the temperature difference energy generated in the environment, and the temperature difference power generation effect changes in real time with the environment state, and is greatly affected by temperature. When no additional heat dissipation device or variable heat source is installed in the system, the temperature of the system gradually tends to be stable, and it is difficult to maintain a large temperature difference to provide a large amount of electrical energy. However, these additional heat dissipation devices and variable heat sources will increase the input electrical energy of the system and reduce the overall system "temperature difference energy-electrical energy" conversion efficiency. It is of practical significance to improve the ability of the temperature difference power generation device to maintain the temperature difference between the cold and hot ends without increasing the input electrical energy of the system, thereby improving the long-time power supply capability of the temperature difference power generation device. SUMMARY

[0004] The application provides a temperature difference power generation device capable of prolonging power supply, which can maintain a temperature difference for a long time and improve the long-time power supply capability.

[0005] In order to achieve the above purpose, the application adopts the following specific technical scheme:

[0006] A temperature difference power generation device capable of prolonging power supply, which comprises a cuboid-shaped shell, a top surface temperature difference power generation sheet, a side surface temperature difference power generation sheet, a phase change material, and an energy storage battery.

[0007] The top surface temperature difference power generation sheet is sealingly installed on the top of the shell, and the side surface temperature difference power generation sheet is sealingly installed around the shell; the shell, the top surface temperature difference power generation sheet and the side surface temperature difference power generation sheet surround to form a hollow cavity; the hollow cavity is filled with the phase change material; the phase change material is used for storing and slowly releasing heat; the shell is provided with a center protrusion recessed into the hollow cavity from the bottom surface; a hollow circuit installation chamber is formed in the center protrusion, and the circuit installation chamber is provided with an opening at the bottom of the shell; the top of the center protrusion is used for supporting the top surface temperature difference power generation sheet.

[0008] The energy storage battery is installed in the circuit installation chamber; the energy storage battery is electrically connected between the top surface thermoelectric power generation sheet and the side surface thermoelectric power generation sheet, and is used for storing the electric energy generated by the top surface thermoelectric power generation sheet and the side surface thermoelectric power generation sheet.

[0009] Further, the shell is composed of an upper shell and a lower shell which are butted together;

[0010] The upper shell is composed of four door-shaped frames which are sequentially connected in a circumferential direction;

[0011] The lower shell is composed of a bottom plate and a central protrusion which is fixedly connected to the center of the top surface of the bottom plate;

[0012] The bottom end surface of the door-shaped frame is fixedly connected to the top surface of the bottom plate;

[0013] One side surface thermoelectric power generation sheet is embedded in each door-shaped frame, and one top surface thermoelectric power generation sheet is installed in the middle of the top of the four door-shaped frames.

[0014] Further, the central protrusion is composed of a base, a top line channel and a top support which are sequentially connected;

[0015] The base is fixedly connected to the top surface of the bottom plate, and an internal circuit installation chamber is formed therein;

[0016] The top surface of the top support abuts against the bottom surface of the top surface thermoelectric power generation sheet, and the top support is used for supporting the top surface thermoelectric power generation sheet;

[0017] The top support and the top line channel are both hollow structures and are in communication with the circuit installation chamber;

[0018] The positive and negative electrode leads led out from the top surface thermoelectric power generation sheet enter the circuit installation chamber through the top support and the top line channel, and are electrically connected with the energy storage battery.

[0019] Further, a bottom support is arranged at each of the four corners of the door-shaped frame; the top surface of the bottom support supports the bottom surface of the top surface thermoelectric power generation sheet.

[0020] Further, the door-shaped frame is provided with opposite embedding grooves which extend in a vertical direction;

[0021] The two side edges of the side surface thermoelectric power generation sheet are embedded in the embedding grooves in a shape-fitting manner.

[0022] Further, the door-shaped frame is provided with a lower side air hole which is parallel to the embedding groove and is in communication with the embedding groove at a corner of each embedding groove;

[0023] The inner joint of the door-shaped frame is provided with an upper side air hole which is located at the four corners of the top surface thermoelectric power generation sheet;

[0024] The top end opening of the upper side air hole is located at the top surface of the door-shaped frame, and the bottom end is closed by the bottom support;

[0025] The bottom opening of the lower vent is located on the bottom surface of the portal frame.

[0026] Furthermore, positioning protrusions are provided at all four corners of the top surface of the base plate;

[0027] Positioning grooves corresponding to the positioning protrusions are provided at the joints of the portal frame.

[0028] The positioning protrusion is shaped to fit into the positioning groove.

[0029] Furthermore, the base plate is provided with two wire slots corresponding to each side thermoelectric generator. The wire slots are opened on the side and bottom of the base plate to accommodate the positive and negative electrode wires led out from the side thermoelectric generators, and to allow the other end of the positive and negative electrode wires to enter the circuit installation chamber and be electrically connected to the energy storage battery.

[0030] Furthermore, the spacing between the positive and negative electrodes on the side of the thermoelectric generator is the same as the spacing between the corresponding two wire slots, so that the wires connecting the positive and negative electrodes on the side of the thermoelectric generator can be smoothly embedded into the wire slots of the base plate.

[0031] The positive and negative electrodes of the top surface thermoelectric generator are both located on the bottom surface and within the projection range of the hollow structure of the top support, so that the wires connecting the positive and negative electrodes of the top surface thermoelectric generator can pass through the top wire channel.

[0032] Furthermore, the height difference between the top surface of the top support and the top surface of the portal frame is equal to the thickness of the top surface thermoelectric generator, so that the top surface of the installed top surface thermoelectric generator is flush with the top surface of the portal frame.

[0033] The height of the groove is equal to the height of the side thermoelectric generator, so that the installed side thermoelectric generator is sealed between the base plate and the portal frame.

[0034] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0035] 1. The thermoelectric power generation device of the present invention utilizes a cubic structure to encapsulate at least 5 thermoelectric power generation plates, taking into account the installation and arrangement of phase change materials and management circuits, increasing the contact area between the hot and cold ends of the thermoelectric power generation plates, and capturing the temperature difference energy under different temperature gradients on the 5 surfaces, thereby increasing the power generation of the entire thermoelectric power generation device.

[0036] 2. The thermoelectric power generation device of the present invention is filled with phase change material in the hollow cavity between the shell and the thermoelectric power generation plate. The phase change material stores heat energy, delays the heat release time, prolongs the existence time of temperature difference on the five surfaces of the entire thermoelectric power generation device, and prolongs the effective power supply time of the entire thermoelectric power generation device.

[0037] 3. In the thermoelectric power generation device of the present invention, one side of the thermoelectric power generation plate is directly exposed to the outside, and can directly contact the heat source or cold source to generate temperature changes. The other side is in close contact with the internal phase change material, which can effectively reduce heat loss during heat conduction and improve the thermoelectric power generation efficiency of the thermoelectric power generation device.

[0038] 4. The thermoelectric power generation device of the present invention has good packaging stability. The energy storage battery is installed in the circuit installation chamber. The circuit installation chamber is separated from the hollow cavity, which provides better electrical stability and temperature difference maintenance capability for the thermoelectric power generation device and can adapt to a variety of complex working environments. Attached Figure Description

[0039] Figure 1 This is a perspective view of the thermoelectric power generation device of the present invention;

[0040] Figure 2 for Figure 1 A bottom-view perspective of the middle shell;

[0041] Figure 3 for Figure 1 Top-view perspective of the middle shell;

[0042] Figure 4 This is a three-dimensional view of the upper outer shell;

[0043] Figure 5 This is a bottom view of the upper outer shell;

[0044] Figure 6 This is a three-dimensional view of the lower outer shell;

[0045] Figure 7 This is a bottom view of the lower outer shell;

[0046] Figure 8 This is a schematic diagram of the electrode structure of a side-mounted thermoelectric generator;

[0047] Figure 9 This is a schematic diagram of the electrode structure of the top surface thermoelectric generator.

[0048] Among them, 1-upper shell, 2-lower shell, 3-side thermoelectric generator, 4-top thermoelectric generator, 101-groove, 102-bottom support, 103-upper vent, 104-gate frame, 105-lower vent, 106-positioning groove, 201-wire groove, 202-top wire channel, 203-base, 204-top support, 205-circuit installation chamber, 206-positioning protrusion, 301-side positive and negative electrodes, 401-top positive and negative electrodes. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] This invention provides a thermoelectric power generation device that can extend power supply, such as... Figure 1 As shown, the thermoelectric power generation device includes a cubic shell, side thermoelectric generators 3, top thermoelectric generators 4, phase change material, power management module, and energy storage battery; wherein:

[0051] A top surface thermoelectric generator 4 is sealed and installed on the top of the shell, and side surface thermoelectric generators 3 are sealed and installed around the perimeter of the shell. The shell, the top surface thermoelectric generator 4, and the side surface thermoelectric generators 3 surround each other to form a hollow cavity. The hollow cavity is filled with a phase change material. The phase change material is used to store and slowly release heat. The phase change material can be graphene-paraffin (graphene-doped paraffin) or carbon nanotube-doped paraffin. The shell has a central protrusion that is recessed into the hollow cavity from the bottom. A hollow circuit mounting chamber 205 is formed inside the central protrusion. The circuit mounting chamber 205 has an opening at the bottom of the shell. The top of the central protrusion supports the top surface thermoelectric generator 4. The power management module and the energy storage battery are installed in the circuit mounting chamber 205. The energy storage battery is electrically connected to both the top surface thermoelectric generator 4 and the side surface thermoelectric generators 3 and is used to store the electrical energy generated by the top surface thermoelectric generator 4 and the side surface thermoelectric generators 3. The power management module is used to control the charging and discharging of the energy storage battery.

[0052] like Figure 2 and Figure 3 As shown, the housing of the aforementioned thermoelectric generator is formed by connecting an upper outer shell 1 and a lower outer shell 2, with the upper outer shell 1 located above the lower outer shell 2; the upper outer shell 1 and the lower outer shell 2, fixedly connected together, constitute the frame structure of the thermoelectric generator. The upper outer shell 1 is used to install the top thermoelectric generator 4 and the side thermoelectric generator 3. Figure 4 and Figure 5 As shown, the upper outer shell 1 is composed of four portal frames 104 connected end to end along the circumference. A space for mounting the side thermoelectric generators 3 is formed between each portal frame 104 and the lower outer shell 2. The bottom of each portal frame 104 is open, allowing the bottom of the side thermoelectric generators 3 to be sealed and mounted on the top surface of the lower outer shell 2. The four portal frames 104 are connected as a whole to form the main structure of the shell, and a space for mounting the top surface thermoelectric generators 4 is formed on top of the four portal frames 104. The top surface thermoelectric generators 4 are mounted horizontally, while the side thermoelectric generators 3 are mounted vertically.

[0053] likeFigure 6 and Figure 7 As shown, the lower outer shell 2 is composed of a base plate and a central protrusion; the central protrusion is fixedly connected to the center of the top surface of the base plate; the opening of the circuit mounting chamber 205 is set through the center of the base plate; the bottom surfaces of the four portal frames 104 are all fixedly connected to the top surface of the base plate, and a side thermoelectric generator 3 is embedded in each portal frame 104, forming the four sides of a cube with the portal frame 104 and the embedded side thermoelectric generator 3; a top surface thermoelectric generator 4 is installed in the middle of the top of the four portal frames 104.

[0054] like Figure 6 and Figure 7 As shown, the central protrusion is composed of a base 203, a top wire channel 202, and a top support 204 connected in sequence. The base 203 is fixedly connected to the top surface of the base plate, and forms a circuit mounting chamber 205 inside. The top wire channel 202 connects the top support 204 and the base 203. The base 203 and the base plate are an integral structure. The circuit mounting chamber 205 is formed inside the base 203. Both the top support 204 and the top wire channel 202 are hollow structures and communicate with the circuit mounting chamber 205. The positive and negative electrode wires led out from the top surface thermoelectric generator 4 enter the circuit mounting chamber 205 through the top support 204 and the top wire channel 202, and are electrically connected to the energy storage battery. The top surface of the top support 204 abuts against the bottom surface of the top surface thermoelectric generator 4, and the top support 204 is used to support the top surface thermoelectric generator 4. The top support 204 can be a square plate with a central hole. The top wire channel 202 can be composed of a circular tube.

[0055] like Figure 3 and Figure 5 As shown, a base support 102 is provided at each of the four inner corners of the portal frame 104; the top surface of the base support 102 supports the bottom surface of the top surface thermoelectric generator 4. Since the base support 102 is provided at the four inner corners of the portal frame 104, and a top support 204 is provided at the center, the four corners of the top surface thermoelectric generator 4 can be supported by the base support 102, and the center of the top surface thermoelectric generator 4 can be supported by the top support 204. This makes the support of the top surface thermoelectric generator 4 relatively stable, and the force is evenly distributed, which can improve the working stability of the top surface thermoelectric generator 4.

[0056] like Figure 4 and Figure 5As shown, the portal frame 104 is provided with vertically extending and opposing grooves 101, that is, grooves 101 for installation are provided on both sides of the side thermoelectric generator 3. The two sides of the side thermoelectric generator 3 are fitted into the grooves 101 in a matching shape. Installing the side thermoelectric generator 3 through the grooves 101 simplifies the installation and improves the sealing between the side thermoelectric generator 3 and the portal frame 104. At the same time, the portal frame 104 is provided with a lower vent hole 105 parallel to and communicating with each corner of the groove 101. The top end of the lower vent hole 105 communicates with the groove 101 and is located in the portal frame 104, and the bottom opening is located on the bottom surface of the portal frame 104. The lower vent hole 105 facilitates the installation of the side thermoelectric generator 3, and can also be sealed by applying glue after installation. The inner joint of the portal frame 104 is provided with upper vent holes 103 located at the four corners of the top thermoelectric generator 4. That is, upper vent holes 103 are provided at the four inner corners of the top of the portal frame 104. The top opening of the upper vent hole 103 is located on the top surface of the portal frame 104, and the bottom end is closed by the base support 102. Similarly, the upper vent hole 103 facilitates the installation of the top thermoelectric generator 4, and after installation, it can also be sealed by injecting glue through the upper vent hole 103.

[0057] like Figure 2 and Figure 3 As shown, positioning protrusions 206 are provided at the four corners of the top surface of the base plate; positioning grooves 106 corresponding to the positioning protrusions 206 are provided at the junctions of the portal frame 104; the positioning protrusions 206 are shaped and fitted into the positioning grooves 106. In this embodiment, the positioning protrusions 206 are square blocks and the positioning grooves 106 are square recesses, which is used as an example. Square positioning protrusions 206 higher than the top surface of the base plate are provided at the four corners of the base plate, and square positioning grooves 106 that fit the shape of the positioning protrusions 206 and can form a snap-fit ​​are provided at the four corners of the outer periphery of the portal frame 104. The positioning protrusions 206 at the four corners fit the positioning grooves 106 to achieve horizontal positioning of the lower shell 2 on the upper shell 1.

[0058] like Figure 6 and Figure 7 As shown, the base plate is provided with two wire grooves 201 corresponding to each side thermoelectric generator 3. The wire grooves 201 are opened on the side and bottom of the base plate to accommodate the positive and negative electrode wires led out from the side thermoelectric generator 3, and to allow the other end of the positive and negative electrode wires to enter the circuit mounting chamber 205 and be electrically connected to the energy storage battery. Figure 8 As shown, the spacing between the positive and negative electrodes 301 on the side of the thermoelectric generator 3 is the same as the spacing between the two corresponding wire grooves 201, so that the wires connecting the positive and negative electrodes 301 on the side of the thermoelectric generator 3 can be smoothly embedded into the wire grooves 201 of the base plate.

[0059] like Figure 9 As shown, the positive and negative electrodes 401 of the top surface thermoelectric generator 4 are both disposed on the bottom surface and are located within the projection range of the hollow structure of the top support 204, so that the wires connecting the positive and negative electrodes 401 of the top surface thermoelectric generator 4 can pass through the top wire channel 202.

[0060] To ensure the overall flatness of the thermoelectric generator, the height difference between the top surface of the top support 204 and the top surface of the portal frame 104 is equal to the thickness of the top thermoelectric generator 4, so that the top surface of the installed top thermoelectric generator 4 is flush with the top surface of the portal frame 104; the height of the groove 101 on the portal frame 104 is equal to the height of the side thermoelectric generator 3, so that the installed side thermoelectric generator 3 is sealed between the base plate and the portal frame 104, forming a closed structure between the shell, the side thermoelectric generator 3 and the top thermoelectric generator 4.

[0061] The aforementioned thermoelectric generator utilizes a cubic shell with four side thermoelectric generator plates 3 installed around its perimeter and one top thermoelectric generator plate 4 installed on its top surface, thus encapsulating at least five thermoelectric generator plates within it. Simultaneously, the sealing installation of the thermoelectric generator plates within the shell forms a sealed space—a hollow cavity—filled with phase change material. A recessed circuit mounting chamber 205 is formed on the bottom surface of the shell, through which energy storage batteries and a power management module can be installed. Therefore, the thermoelectric generator with this structure not only considers the installation arrangement of the phase change material and management circuitry but also increases the contact area between the hot and cold ends of the thermoelectric generator plates, enabling the capture of temperature difference energy under different temperature gradients on five surfaces, thereby increasing the overall power generation of the thermoelectric generator.

[0062] The aforementioned thermoelectric generator is filled with phase change material in the hollow cavity between the shell and the thermoelectric generator plate. When the external temperature of the shell is high, the phase change material can be used to store thermal energy. When the external temperature of the shell is low, the thermal energy stored in the phase change material can be used to form a temperature difference. The phase change material can delay the heat release time, prolong the existence time of the temperature difference on the five surfaces of the entire thermoelectric generator, and prolong the effective power supply time of the entire thermoelectric generator.

[0063] In the aforementioned thermoelectric power generation device, both the side thermoelectric power generation plate 3 and the top thermoelectric power generation plate 4 have one side directly exposed to the outside, which can directly contact the heat source or cold source to generate temperature changes, while the other side is in close contact with the internal phase change material, which can effectively reduce heat loss during heat conduction and improve the thermoelectric power generation efficiency of the device.

[0064] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A thermoelectric generator with extended power supply, characterized in that, It includes a cube-shaped shell, a top thermoelectric generator, a side thermoelectric generator, a phase change material, and an energy storage battery; A top surface thermoelectric generator is sealed and installed on the top of the shell, and side surface thermoelectric generators are sealed and installed around the perimeter of the shell. The shell, the top surface thermoelectric generator, and the side surface thermoelectric generators surround each other to form a hollow cavity. The hollow cavity is filled with a phase change material. The phase change material is used to store and slowly release heat. The shell has a central protrusion that is recessed into the hollow cavity from the bottom. A hollow circuit mounting chamber is formed inside the central protrusion, and the circuit mounting chamber has an opening at the bottom of the shell. The top of the central protrusion is used to support the top surface thermoelectric generator. The energy storage battery is installed in the circuit installation room; the energy storage battery is electrically connected to both the top and side thermoelectric generators.

2. The thermoelectric power generation device as described in claim 1, characterized in that, The shell consists of an upper outer shell and a lower outer shell joined together; The upper shell consists of four portal-shaped frames connected end to end along the circumference; The lower outer shell consists of a base plate and a central protrusion; the central protrusion is fixedly connected to the center of the top surface of the base plate. The bottom end of the portal frame is fixedly connected to the top surface of the base plate; Each portal frame is fitted with a side thermoelectric generator, and a top thermoelectric generator is installed in the middle of the top of the four portal frames.

3. The thermoelectric power generation device as described in claim 2, characterized in that, The central protrusion consists of a base, a top channel, and a top support connected in sequence; The base is fixedly connected to the top surface of the base plate, and the interior forms a circuit installation chamber; The top surface of the top support abuts against the bottom surface of the top surface thermoelectric generator, and the top support is used to support the top surface thermoelectric generator. Both the top support and the top wiring channel are hollow structures and are connected to the circuit installation chamber. Positive and negative electrode wires led out from the top surface thermoelectric generator enter the circuit installation chamber through the top support and top wire channel, and are electrically connected to the energy storage battery.

4. The thermoelectric power generation device as described in claim 3, characterized in that, The four inner corners of the portal frame are equipped with base supports; the top surface of the base supports the bottom surface of the top surface thermoelectric generator.

5. The thermoelectric power generation device as described in claim 4, characterized in that, The portal frame is provided with vertically extending and opposite grooves; The two sides of the side thermoelectric generator are fitted into the groove in a matching shape.

6. The thermoelectric power generation device as described in claim 5, characterized in that, The portal frame has a lower vent hole that is parallel to and connected to each corner of the slot; Ventilation holes are provided at the upper sides of the four corners of the thermoelectric generator on the top surface at the internal joints of the portal frame. The top opening of the upper vent is located on the top surface of the portal frame, and the bottom is closed by the base. The bottom opening of the lower vent is located on the bottom surface of the portal frame.

7. The thermoelectric power generation device as described in claim 2, characterized in that, Positioning protrusions are provided at all four corners of the top surface of the base plate; Positioning grooves corresponding to the positioning protrusions are provided at the joints of the portal frame. The positioning protrusion is shaped to fit into the positioning groove.

8. The thermoelectric power generation device as described in claim 2, characterized in that, The base plate is equipped with two wire slots corresponding to each side thermoelectric generator. The wire slots are opened on the side and bottom of the base plate to accommodate the positive and negative electrode wires led out from the side thermoelectric generators, and to allow the other end of the positive and negative electrode wires to enter the circuit installation chamber and be electrically connected to the energy storage battery.

9. The thermoelectric power generation device as described in claim 8, characterized in that, The spacing between the positive and negative electrodes on the side of the thermoelectric generator is the same as the spacing between the two corresponding wire slots, so that the wires connecting the positive and negative electrodes on the side of the thermoelectric generator can be smoothly embedded into the wire slots of the base plate. The positive and negative electrodes of the top surface thermoelectric generator are both located on the bottom surface and within the projection range of the hollow structure of the top support, so that the wires connecting the positive and negative electrodes of the top surface thermoelectric generator can pass through the top wire channel.

10. The thermoelectric power generation device as described in claim 3, characterized in that, The height difference between the top surface of the top support and the top surface of the portal frame is equal to the thickness of the top surface thermoelectric generator, so that the top surface of the installed top surface thermoelectric generator is flush with the top surface of the portal frame. The height of the groove is equal to the height of the side thermoelectric generator, so that the installed side thermoelectric generator is sealed between the base plate and the portal frame.

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