CN117458913A - Watch based on thermoelectric generation - Google Patents
Watch based on thermoelectric generation Download PDFInfo
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- CN117458913A CN117458913A CN202311261556.1A CN202311261556A CN117458913A CN 117458913 A CN117458913 A CN 117458913A CN 202311261556 A CN202311261556 A CN 202311261556A CN 117458913 A CN117458913 A CN 117458913A
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- 238000010248 power generation Methods 0.000 claims abstract description 66
- 238000004321 preservation Methods 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000004146 energy storage Methods 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims description 25
- 239000004020 conductor Substances 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229920000742 Cotton Polymers 0.000 claims description 15
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 15
- 230000036760 body temperature Effects 0.000 claims description 15
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- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 11
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 description 11
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G17/00—Structural details; Housings
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
- G04G19/10—Arrangements for supplying back-up power
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
The invention discloses a watch based on thermoelectric generation, which comprises a watch shell, wherein a thermoelectric generation module, a low-temperature chamber, a heat preservation chamber and a power supply energy storage module are arranged in the watch shell; the thermoelectric power generation module comprises a thermoelectric power generation chip, and the cold end and the hot end of the thermoelectric power generation chip are respectively and correspondingly connected with the low-temperature chamber and the heat preservation chamber; the low-temperature chamber is arranged at one end of the bottom cover far away from the watch shell, a radiator is arranged in the low-temperature chamber, and a first heat conduction material is filled between the radiator and the low-temperature chamber; the heat preservation chamber is arranged at one end of the bottom cover close to the watch shell and is used for acquiring and storing heat conducted at the bottom cover of the watch shell; the power supply energy storage module is electrically connected with the thermoelectric generation module and is used for supplying power to the watch; the invention has the advantages of good thermoelectric generation effect, simple structure and stable operation.
Description
Technical Field
The invention belongs to the technical field of watches, and particularly relates to a watch based on thermoelectric generation.
Background
The thermoelectric generation technology is a technology of converting temperature difference into electric energy. The waste heat power generation is energy-saving and is beneficial to environmental protection. The thermoelectric generation technology has been developed for many years, and is mainly applied to the field of large-scale equipment due to the limitation of the generation efficiency, so that the application in the field of watches is relatively few, and the trend of large-scale application is not presented.
The design of the thermoelectric generation watch initially uses the thermoelectric generation technology to convert the temperature difference into electric energy, thereby providing continuous power supply for the watch. This design aims to reduce or eliminate the dependency of the conventional battery on the watch, thereby achieving a more environmentally friendly and sustainable energy utilization. In addition, the design of thermoelectric generation wrist-watch also has energy-conserving advantage. The electric energy generator can generate electric energy by utilizing the temperature difference of human bodies or the ambient temperature difference, thereby reducing the dependence on external energy sources.
The body temperature electricity generation type watch uses the temperature difference between the body temperature and the outside air temperature to generate electromotive force as energy, namely 'Seebeck effect'. Body temperature power generation watches are typically equipped with thermoelectric technology in combination with low power electronics and with a corresponding processor. When the body temperature power generation type watch is worn, the watch can run and charge according to the body temperature, and the generated surplus electric quantity can be stored in a built-in battery; when the watch is taken off, the watch can actively enter the sleep mode to save electricity, for example, the display screen can be turned off by itself, and the stored electric quantity can ensure normal timing.
The seebeck effect refers to the voltage difference that occurs between two contact points at different temperatures when there is a temperature difference. The peltier effect refers to the temperature difference that occurs between two contact points at different temperatures when a current is passed.
Aiming at the existing thermoelectric generation watch product, the following problems are presented: the existing thermoelectric generation watch is difficult to form effective temperature difference, the autonomous power generation capacity is low, the main electricity consumption depends on button cells, and thermoelectric technology electronic devices are difficult to form stable electric energy for normal operation of the watch.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a watch based on thermoelectric generation, and the scheme has the advantages of good thermoelectric generation effect, simple structure and stable operation.
In order to achieve the above purpose, the invention adopts the following technical scheme: the watch based on thermoelectric power generation comprises a watch shell, wherein a thermoelectric power generation module, a low-temperature chamber, a heat preservation chamber and a power energy storage module are arranged in the watch shell;
the thermoelectric power generation module comprises a thermoelectric power generation chip, and the cold end and the hot end of the thermoelectric power generation chip are respectively and correspondingly connected with the low-temperature chamber and the heat preservation chamber;
the low-temperature chamber is arranged at one end of the bottom cover far away from the watch shell, a radiator is arranged in the low-temperature chamber, and a first heat conduction material is filled between the radiator and the low-temperature chamber;
the heat preservation chamber is arranged at one end of the bottom cover close to the watch shell and is used for acquiring and storing heat conducted at the bottom cover of the watch shell;
the power energy storage module is electrically connected with the thermoelectric generation module and is used for supplying power to the watch.
In the scheme, the heat preservation cavity forms one end with higher temperature through storing heat conducted by the watch shell bottom cover, the low-temperature cavity is far away from the heat source, the first heat conducting material is filled in the low-temperature cavity, the first heat conducting material and the radiator are utilized to enable the temperature of the space to be lower, the temperature difference between the high-temperature cavity and the low-temperature cavity is kept all the time, the cold end and the hot end of the thermoelectric generation chip can keep the temperature difference to generate electricity all the time, the thermoelectric generation chip can utilize the temperature difference to generate electricity according to the Seebeck effect and Peltier effect principle, the generated electricity is transmitted to the power energy storage module to be stored, and the electricity in the power energy storage module is used for supplying watch work.
Thermoelectric materials are semiconductor materials with good thermoelectric properties for converting weak voltages generated by thermoelectric materials into usable electrical energy; when the watch is in contact with a human body, the thermoelectric generation chip can sense the temperature difference between the body temperature and the low-temperature chamber and generate voltage; thermoelectric generation chips typically include circuitry and electronic components that store electrical energy for use in the operation of a wristwatch.
Further, the power energy storage module comprises a lead-acid battery or a lithium ion battery or a nickel-hydrogen battery storage battery, and is used for converting electric energy generated by the thermoelectric generation chip into chemical energy and storing the chemical energy in the battery.
When electrical energy is required, the battery may be used by converting stored chemical energy into electrical energy for external devices.
Further, the heat preservation cavity contains the mainboard packing ring and locates two sealing plates of mainboard packing ring upside down, wrist-watch functional module's outer fringe is connected with the mainboard packing ring, wrist-watch functional module is located between two sealing plates.
Strengthen the seal through mainboard packing ring and two sealing plates for the heat storage, fix a position the watch function module through the draw-in groove on the mainboard packing ring, and store the heat that the mainboard produced, further improve the temperature of heat preservation cavity, be favorable to improving generating efficiency.
Further, an opening is formed in the sealing plate, a second heat conducting material for transferring heat is arranged at the opening, and the sealing plate is made of aluminum silicate heat-insulating cotton.
The opening at the bottom of the heat preservation chamber is convenient for the human body temperature to be transferred to the heat preservation chamber and the thermoelectric generation chip. When the watch is worn, the aluminum silicate heat-insulating cotton material can store heat emitted by the human arm, the heat-conducting material II improves the efficiency of the transmission of the temperature at the bottom cover of the watch to the heat-insulating cavity, and the heat-insulating cavity is correspondingly connected with the hot end of the thermoelectric generation chip, so that higher temperature is generated at the hot end of the thermoelectric generation chip.
Further, the main board gasket is made of aluminum silicate heat-insulating cotton, and the sealing plate is made of heat-conducting metal.
The inside of the heat preservation cavity is insulated by the aluminum silicate heat preservation cotton material, and the sealing plate is made of heat conduction metal material, so that the temperature at the arm is conveniently conducted to the thermoelectric generation chip at the upper side.
Further, a temperature sensor for detecting the body temperature in real time is arranged in the watch shell, and the temperature sensor is electrically connected with the watch functional module.
The body temperature can be monitored in real time through the temperature sensor, data are transmitted to the watch functional module, the temperature can be displayed on the display screen of the watch functional module, and the body temperature condition can be conveniently acquired.
Furthermore, the watch case comprises a copper bottom cover, and a third heat conducting material is arranged between the second heat conducting material and the copper bottom cover.
The area of the thermoelectric power generation chip is as large as possible under the premise that the area in the watch case is allowed, and the copper sheet is used for the watch bottom cover, and the inner side heat conduction material is tightly attached by graphite glue or other heat conduction grease, so that the thermoelectric power generation efficiency is ensured.
Furthermore, the thermoelectric power generation chip, the low-temperature chamber, the heat preservation chamber and the watch function module are all made into cuboid shapes and are tightly connected together through buckles, the thermoelectric power generation chip, the DC/DC module and the power energy storage module are connected through flat cables, and the watch screen, the low-temperature chamber, the thermoelectric power generation module and the heat preservation chamber are sequentially arranged from top to bottom.
The power energy storage module and the DC/DC module are connected by a flat cable so as to reduce the invasion of the wire harness to the inner space of the watch case. The upper and lower parts are sequentially arranged, so that the low-temperature chamber is far away from a human body, and the temperature difference is convenient to form.
Further, the low-temperature chamber comprises a heat dissipation shell connected with a radiator, the radiator comprises a plurality of heat dissipation parts, and the heat dissipation parts are connected with a first heat conduction material.
The temporary closed space is formed by the heat dissipation shell and the radiator, the heat dissipation area is enlarged by matching the heat conduction material I with the heat dissipation part of the radiator, and the heat dissipation is facilitated, so that the temperature of the cold end of the thermoelectric generation sheet is reduced, the temperature difference is increased, and the power generation efficiency is improved.
Further, the thermoelectric power generation chip is a sheet-shaped semiconductor thermoelectric chip manufactured by processing bismuth telluride serving as a thermoelectric material.
The thermoelectric power generation chip is manufactured by processing bismuth telluride serving as a thermoelectric material through a battery packaging technology, so that thermoelectric power generation is realized, and the thermoelectric power generation chip is used for a watch. Bismuth telluride is a material with excellent thermoelectric properties, and has high thermoelectric efficiency and stability. The temperature difference can be converted into electric energy, and weak voltage is output. Bismuth telluride is processed into a sheet-shaped semiconductor thermoelectric chip by a battery packaging technology, so that the bismuth telluride is conveniently integrated into a watch.
Further, a DC/DC module and a watch function module are arranged in the watch shell, the DC/DC module is electrically connected with the thermoelectric power generation module, the power energy storage module is electrically connected with the DC/DC module, the watch function module is arranged in the heat preservation chamber, and the watch function module is electrically connected with the power energy storage module.
The DC/DC module has the voltage-increasing and voltage-decreasing functions of increasing low voltage to high voltage and reducing high voltage to low voltage, and converts electric energy generated by the thermoelectric power generation chip into constant electric energy through the DC/DC module and then transmits the constant electric energy to the power energy storage module for storage, so that the constant electric energy is convenient to store and use, the electric energy in the power energy storage module is used for the watch function module to normally realize the watch timing function, the watch function module is arranged in the heat preservation chamber, and heat generated during operation is beneficial to the storage and temperature increase of the heat preservation chamber.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the low-temperature chamber and the heat-preservation chamber are arranged at two sides of the thermoelectric power generation chip, and enough temperature difference conditions are provided for power generation, so that the thermoelectric power generation chip can realize ultra-long endurance time, and the thermoelectric power generation chip is energy-saving, environment-friendly and good in power generation effect;
2. according to the invention, the thermoelectric power generation chip technology and the chamber structure for forming the temperature difference are integrally arranged in the watch shell, so that the internal space of the watch is fully utilized, the product device is integrated, the structure is simple and easy to mount, and the overhaul and maintenance are convenient;
3. the temperature difference power generation module is matched with the DC/DC module and the electric energy storage module, so that generated electric power is converted and stored, enough electric power is ensured to enable the watch to normally work and run, the energy is self-sufficient, and the dependence of the watch on a button cell is reduced;
4. the thermoelectric power generation chip and the thermoelectric cavity structure are arranged in the invention, and meanwhile, the structure volume can be matched with most of watch devices on the market, so that the use is convenient.
Drawings
FIG. 1 is an exploded view of the structure of example 1 of the present invention;
FIG. 2 is a second exploded view of the structure of example 1 of the present invention;
FIG. 3 is a cross-sectional view showing the structure of embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a sealing plate in embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of a second heat conductive material in embodiment 2 of the present invention;
in the figure: 1. a connecting pipe; 2. a low temperature chamber; 3. a DC/DC module; 4. a thermoelectric generation chip; 5. a heat-insulating chamber; 6. a watch function module; 7. a power energy storage module; 8. a buckle; 9. a watch case; 10. a watch screen; 11. a temperature sensor; 12. a bottom cover; 13. an opening; 14. a second heat conducting material; 201. a heat sink; 202. a heat dissipation housing; 701. a storage battery; 702. a resistor; 501. a main plate gasket; 502. and (5) a sealing plate.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention. In the description of the present invention, it should be noted that, the terms front, rear, left, right, and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product is conventionally put in use, merely for convenience of describing the present invention or simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured or operated in a specific azimuth, and thus should not be construed as limiting the present invention.
Example 1
As shown in fig. 1-3, a watch based on thermoelectric power generation comprises a watch shell 9, wherein a watch screen 10, a thermoelectric power generation module, a low-temperature chamber 2, a power energy storage module 7, a heat preservation chamber 5, a DC/DC module 3 and a watch function module 6 are arranged in the watch shell 9;
a low-temperature chamber 2, the inside of which is provided with a radiator and a first heat conducting material, the first heat conducting material is filled between the low-temperature chamber and the radiator 201;
a heat-insulating chamber 5 for storing human body heat conducted at the bottom cover of the watch case;
the thermoelectric power generation module comprises a thermoelectric power generation chip 4 for generating electric energy, and the cold end and the hot end of the thermoelectric power generation chip 4 are respectively connected with the low-temperature chamber 2 and the heat preservation chamber 5;
a DC/DC module 3 electrically connected to the thermoelectric generation module;
the power supply energy storage module 7 is electrically connected with the DC/DC module 3 and is used for storing the converted constant electric energy and supplying power to the watch functional module 6;
the watch function module 6 is used for realizing a watch timing function, and the watch function module 6 is electrically connected with the power energy storage module 7;
the watch screen 10 is electrically connected to the watch function module 6.
In the above scheme, the watch screen 10 on the watch case 9 is used for displaying time and related information, the heat-preserving chamber 5 forms one end with higher temperature by storing human body heat, the low-temperature chamber 2 uses the first heat-conducting material and the radiator 201 to enable the space temperature to be always lower, the high-temperature chamber and the low-temperature chamber 2 always keep temperature difference, the cold end and the hot end of the thermoelectric power generation chip 4 keep temperature difference to always generate electricity, the thermoelectric power generation chip 4 can generate electric energy by using the temperature difference according to the Seebeck effect and Peltier effect principle, the generated electric energy is converted into constant electric energy by the DC/DC module 3 and then is transmitted to the power energy storage module 7 for storage, and the electric energy in the power energy storage module 7 is used for the watch function module 6 to normally realize the watch timing function.
Thermoelectric materials are semiconductor materials with good thermoelectric properties for converting weak voltages generated by thermoelectric materials into usable electrical energy; when the watch is in contact with a human body, the thermoelectric generation chip 4 can sense the temperature difference between the body temperature and the low-temperature chamber 2 and generate voltage; the thermoelectric generation chip 4 generally comprises a circuit and electronic elements, and can store electric energy for the operation of the watch; the DC/DC module 3 has a step-up/step-down function capable of increasing the low voltage to a high voltage and decreasing the high voltage to a low voltage.
In the invention, since the electric energy of the storage battery 701 in the power supply energy storage module 7 is provided by the thermoelectric generation chip 4, the thermoelectric generation chip 4 can collect the electric energy generated by temperature difference by placing the bottom cover 12 in a higher-temperature area in the process of wearing the watch daily by a wearer, so that the electric energy of the watch is provided by the thermoelectric generation technology. The watch function module 6 may contain a pointer or a timer, and the watch function module 6 operates normally by means of the power supplied by the energy storage module. The thermoelectric generation chip 4 is connected with the DC/DC module 3, and the DC/DC module 3 is connected with the storage battery 701.
Further, the thermoelectric power generation chip 4 is a sheet-shaped semiconductor thermoelectric chip manufactured by processing bismuth telluride as a thermoelectric material.
The thermoelectric power generation chip 4 is manufactured by processing bismuth telluride serving as a thermoelectric material through a battery packaging technology, so that thermoelectric power generation is realized, and the thermoelectric power generation chip is used for a watch. Bismuth telluride is a material with excellent thermoelectric properties, and has high thermoelectric efficiency and stability. The temperature difference can be converted into electric energy, and weak voltage is output. Bismuth telluride is processed into a sheet-shaped semiconductor thermoelectric chip by a battery packaging technology, so that the bismuth telluride is conveniently integrated into a watch.
The internal thermoelectric power generation chip 4 uses 1.2V or the voltage output required by the watch function module 6 to ensure that the watch function module 6 operates normally.
Further, the power energy storage module 7 comprises a lead-acid battery or a lithium ion battery or a nickel-hydrogen battery 701, and is used for converting the electric energy generated by the thermoelectric generation chip 4 into chemical energy and storing the chemical energy in the battery.
When electrical energy is required, the battery may be used by converting stored chemical energy into electrical energy for external devices.
The advantage of using batteries 701 as the power storage modules 7 is that they have a high energy density and a long service life and are capable of providing a stable and reliable supply of electrical energy. Meanwhile, the storage battery 701 also has better charge and discharge performance and self-discharge characteristic, and can meet the requirements of the watch under different use conditions.
The power energy storage module 7 selects the high-performance storage battery 701 with long service life, no memory effect, high energy density, good charge and discharge performance and large capacity as far as possible so as to ensure energy storage and endurance. The power storage module 7 in the embodiment comprises a plurality of lithium polymer batteries 701 and a resistor 702.
Further, the heat-insulating chamber 5 includes a main board gasket 501 and two sealing plates 502 disposed on the upper and lower sides of the main board gasket 501, the outer edge of the watch function module 6 is connected with the main board gasket 501, and the watch function module 6 is located between the two sealing plates 502.
Strengthen the seal through mainboard packing ring 501 and two sealing plates 502 for the heat storage is fixed a position watch function module 6 through mainboard packing ring 501, and stores the heat that the mainboard produced, further improves the temperature of heat preservation cavity 5, is favorable to improving generating efficiency.
Further, the main board gasket 501 is made of aluminum silicate heat insulation cotton, and the sealing plate 502 is made of heat conductive metal.
The inside of the heat preservation chamber 5 is insulated by aluminum silicate heat preservation cotton, and the sealing plate 502 is made of copper so as to conveniently conduct the temperature of the arm to the thermoelectric generation chip 4 on the upper side.
Further, a temperature sensor 11 for detecting the body temperature in real time is arranged in the watch case 9, and the temperature sensor 11 is electrically connected with the watch function module 6.
The body temperature can be monitored in real time through the temperature sensor 11, and data are transmitted to the watch function module 6, and the temperature can be displayed on the display screen of the watch function module 6, so that the body temperature can be conveniently obtained.
Further, the first heat conducting material comprises heat conducting glue and/or heat conducting silicone grease.
The heat dissipation at the low-temperature chamber 2 is accelerated by the heat-conducting glue and/or the heat-conducting silicone grease, so that the low-temperature chamber 2 is guaranteed to be at a lower temperature.
The heat conducting material in the low-temperature chamber 2 and the radiator 201 occupy a certain space inside the product without affecting the realization of other functions, and the temperature difference is generated by making the temperature of the space always lower than the temperature of a human body, so that the thermoelectric power generation is realized.
Further, the watch case 9 includes a bottom cover 12 made of copper.
The area of the thermoelectric generation chip 4 is as large as possible under the premise that the area in the watch case is allowed, the watch bottom cover 12 is made of copper materials, and a heat conduction material III is arranged between the watch bottom cover 12 and the sealing plate 502 and between the sealing plate 502 and the thermoelectric generation chip, and is tightly attached by graphite glue or other heat conduction grease so as to ensure the efficiency of thermoelectric generation. The copper bottom cover 12 is bonded to the sealing plate 502.
The first and third heat conducting materials may comprise heat conducting glue, graphite glue or heat conducting silicone grease.
Furthermore, the thermoelectric generation chip 4, the low-temperature chamber 2, the heat preservation chamber 5 and the watch function module 6 are all made into cuboid shapes and are tightly connected together through the buckle 8, the thermoelectric generation chip 4, the DC/DC module 3 and the power energy storage module 7 are connected by adopting flat cables, and the watch screen 10, the low-temperature chamber 2, the thermoelectric generation module and the heat preservation chamber 5 are sequentially arranged from top to bottom.
The power energy storage module 7 and the DC/DC module 3 are connected by a flat cable through the buckle 8, so that the invasion of the wire harness to the inner space of the watch case is reduced. The upper and lower parts are sequentially arranged, so that the low-temperature chamber 2 is far away from a human body, and the temperature difference is convenient to form.
Further, the low-temperature chamber 2 comprises a heat dissipation housing 202 for connecting with a heat sink 201, the heat sink 201 comprises a plurality of heat dissipation parts, and the heat dissipation parts are connected with a heat conducting material.
The heat dissipation shell 202 and the radiator 201 form a temporary closed space, and the heat dissipation part of the radiator 201 is matched with the first heat conduction material to enlarge the heat dissipation area, so that heat dissipation is facilitated, the temperature of the cold end of the thermoelectric generation sheet is reduced, the temperature difference is increased, and the power generation efficiency is improved.
The watch is designed with a cryogenic chamber 2, which is maintained at a temperature always below the human body temperature by using a thermally conductive material-and a heat sink 201. In the low-temperature chamber 2 of the wristwatch, the space for improving the heat conduction efficiency can always keep a lower temperature by filling the gaps between the heat sinks 201 with a heat conduction material such as a heat conduction glue or a heat conduction silicone grease. Meanwhile, the low temperature chamber 2 is further provided with a heat sink 201 for enhancing the heat dissipation effect of the low temperature chamber 2. The heat sink 201 may take a variety of forms, such as including a number of aluminum alloy fins. The heat sink 201 effectively reduces the temperature of the low temperature chamber 2 by increasing the contact area with the environment, accelerating the conduction and dissipation of heat. The cold end of the thermoelectric generation chip 4 is connected to the low-temperature chamber 2 of the watch, so that the thermoelectric generation chip 4 can be always in a lower temperature environment. In this way, the thermoelectric generation chip 4 can fully utilize the temperature difference between the temperature of the human body and the temperature of the low-temperature chamber 2 to generate more electric energy.
In some embodiments, the thermoelectric generation chip 4 is in a sheet-shaped design, is placed between the watch low-temperature chamber 2 and the heat preservation chamber 5, is bound with the watch functional module 6, and is fixed together through the buckle 8, so that the thermoelectric generation chip is convenient to maintain in the fixing mode and is simple to operate.
The watch shell 9 is an aluminum shell, the inside is made of stainless steel materials, and the outer aluminum shell is used for preventing daily scraping and spot infection of the watch and guaranteeing the appearance to be stable. The bottom cover 12 of the watch shell is made of metal copper material at the contact part of the watch shell and the arm, has better heat conductivity compared with the aluminum material, can better transfer the heat on the arm of the human body to the heat preservation chamber inside the watch, and the copper sheet is internally coated with heat absorption coating polystyrene resin heat preservation coating, so that the heat absorption coating can effectively absorb the waste heat in the environment, and the absorbed heat is kept not to be easily emitted, thereby providing a relatively stable heat source for the thermoelectric generation chip 4.
The thermoelectric generation module comprises a plurality of thermoelectric generation chips 4 which are connected with the DC/DC module 3 through wires, the thermoelectric generation chips 4 can be connected in series or in parallel according to the requirement, the cold end and the hot end of the thermoelectric generation chips 4 are arranged between the low-temperature chamber 2 and the heat preservation chamber 5, the thermoelectric generation can be realized due to the fact that the temperature difference between the cold end and the hot end of the chips is large, and the thermoelectric generation assembly converts the thermoelectric generation through the DC/DC module 3 and stores the thermoelectric generation in the storage battery 701. The outside of the wire may be provided with a connecting pipe 1 for protection.
The buckle is used for limiting the left-right movement and the up-down movement among the components, ensuring that the thermoelectric generation chip 4 absorbs enough heat at a specific position, and also ensuring that the thermoelectric generation chip 4 has a stable temperature difference source, stably generating certain electric energy and being used for supplying the electric energy of the thermoelectric generation device.
The thermoelectric power generation chip 4 is a power generation device for directly converting heat energy into electric energy based on the Seebeck effect and the Peltier effect. In the embodiment, the PN-type thermoelectric generation chip 4 is used. A p-type thermoelectric element and an n-type thermoelectric element are connected by a metal conductor electrode at the hot end, and cold end electrodes are respectively connected at the cold ends of the p-type thermoelectric element and the n-type thermoelectric element to form a thermoelectric monomer or a thermocouple. And an external load with the RL is connected to the open-circuit access resistor of the thermoelectric unit, and if the hot surface of the thermoelectric unit inputs heat flow, a temperature difference is established between the hot end and the cold end of the thermoelectric unit, so that current can be generated. The device can be connected with other devices, so that the industrial production cost is saved.
The DC/DC module 3 includes a step-up/step-down converter. Study was conducted on the thermoelectric generation chip 4: the voltage and current at the time of no load are defined as open circuit voltages U (open circuit) and I (open circuit), respectively. The hot-face temperature ThK, the cold-face temperature TcK, the temperature difference Δt=th0 TcK, the device resistance RiOhms, the open-circuit voltage U (open circuit) =a (Th 0 Tc) =a×Δt (1), the open-circuit current I (open circuit) =a×Δt/Ri (2), the output voltage=a×Δt/(ri+rl) (3) considering the load, the output current i=u/(ri+rl) =a×Δt/(ri+rl) (4), the load resistance RLOhms, according to equation (3), it is known that the larger the load resistance, the larger the output voltage. Open circuit voltage open circuit Volts from equation (4), it is known that the greater the load resistance, the less the output current. Open circuit current iraq is derived from p=ui, output power=a×Δtet/(ri+rl) ×a×Δt/(ri+rl), output maximum power PmaxWatts, i.e., p=a2×Δt2rl/(ri+rl) 2(5), when ri=rl, p=pmax=a2×Δt2/(4 Ri) (6), and it can be known from formulas (5) and (6) that output power is proportional to the square of the temperature difference. The thermoelectric generation sheet is assembled by adopting a high-strength bismuth telluride thermoelectric material, high-heat-conductivity high-insulation DBC (direct bonding copper) ceramic and high-temperature solder, and is suitable for being used in an environment with a hot end of 200 ℃. The generated power is maximum when the load resistance is equal to the internal resistance of the device (internal resistance under the operating condition).
The power energy storage module 7 is composed of a lithium polymer storage battery 701 and a resistor 702, and the lithium polymer storage battery 701 has better flexibility and bendability in consideration of the internal space of the watch, can adapt to the design of equipment with various shapes, and provides greater design flexibility. Lithium polymer battery 701 is a relatively new technology that is similar to a lithium ion battery, but employs a polymer matrix with greater flexibility and thinner dimensions. The lithium polymer battery 701 adopts a flexible polymer matrix material, can realize a design with small thickness, is suitable for equipment with smaller size and lighter weight, has higher energy density, and can prolong the service time of the equipment. And the safety is higher, the polymer electrolyte has better resistance to temperature change and physical impact, and the safety risk caused by short circuit, electrolyte leakage and other problems is reduced. The addition of a resistor 702 between the battery 701 and the watch may limit the flow of current, which may be done to control the magnitude of the current, prevent excessive current from damaging the watch or the battery 701, and if the watch or the battery 701 fails or is shorted, the resistor 702 may limit the flow of current, preventing excessive current from damaging the device or causing safety problems.
The model of the DC/DC module 3 is URB0MT03WR3, the product adopts an SOJ packaging form, and the volume is 19.2mm x 18.1mm x 10.2mm. Compared with the traditional SMD power supply product, the packaging has good welding resistance, is not easy to deform, occupies smaller area and is more flexible to be distributed. The DC/DC module 3 is an electronic device for converting a direct voltage into a different direct voltage level. It is generally composed of an input, an output, a conversion circuit and a control circuit. The main function of the DC/DC module 3 is to convert the direct current voltage at the input end into the required direct current voltage at the output end through electronic components and control circuits. This conversion can be achieved by different topologies such as boost, buck, boost, buck-boost, inverting.
The heat-insulating chamber 5 uses an aluminum silicate heat-insulating cotton material which has excellent heat-insulating performance: the aluminum silicate heat-insulating cotton has a lower heat conductivity coefficient, can effectively reduce heat conduction, and provides a good heat-insulating effect. Good high temperature resistance: the aluminum silicate heat-insulating cotton can keep stable performance in a high-temperature environment, is not easy to melt or deform, and is suitable for the high-temperature working environment. Good corrosion resistance: the aluminum silicate heat-insulating cotton has good corrosion resistance to acid and alkali chemical substances, and is suitable for corrosive environments. The aluminum silicate heat-insulating cotton has lower density, light weight and convenient carrying and installation. A heat preservation chamber 5 is formed by the material, and a stable heat source is provided for the thermoelectric generation chip 4. The total heat flux is improved, the stability of the heat is maintained, and the thermoelectric generation system is not damaged. And a stable temperature difference can be provided under the cooperation of the thermoelectric generation chip and the low-temperature chamber 2, the thermoelectric generation chip is connected with the hot end of the thermoelectric generation chip 4, and relatively stable electric energy can be provided under the action of the thermoelectric generation chip 4.
The watch functional module 6 may include a controller and a warning module, and the warning module may include a buzzer and an indicator light. Meanwhile, a lighting system is added, so that the watch can be used in dark conditions.
The watch functional module 6 comprises a common time display, a date display, a timer, an alarm, and a health monitoring function and a lighting system, wherein the health monitoring function is an infrared temperature sensor 11 which can determine the temperature of a human body by receiving the infrared radiation emitted by the human body so as to monitor whether the human body has fever. The lighting system provides a screen timeout setting option for the function added in consideration of night use, and can keep the screen always on for five minutes without dormancy for satisfying night use.
Example 2
As shown in fig. 4 to 5, this embodiment is modified as follows based on embodiment 1:
further, the sealing plate 502 is provided with an opening 13, the opening 13 at the bottom of the heat preservation chamber 5 is convenient for transferring the temperature of a human body to the heat preservation chamber 5, the upper opening 13 is convenient for transferring the heat with the thermoelectric power generation chip 4, the sealing plate 502 is made of aluminum silicate heat preservation cotton, the opening 13 is provided with a second heat conduction material 14 for connecting the bottom cover 12 of the watch case 9 and the heat preservation chamber 5, and a third heat conduction material is arranged between the second heat conduction material 14 and the copper bottom cover 12.
When the watch is worn, the aluminum silicate heat-insulating cotton material can store heat emitted by the human arm, the heat-conducting material II 14 improves the efficiency of the transmission from the temperature of the watch bottom cover 12 to the heat-insulating chamber 5 and the heat-insulating chamber 5 to the thermoelectric power generation chip 4, and the heat-insulating chamber 5 is connected with the hot end of the thermoelectric power generation chip 4, so that higher temperature is generated at the hot end of the thermoelectric power generation chip 4. The second heat conducting material 14 comprises a copper metal sheet fixed at the opening 13, wherein a protrusion matched with the opening 13 is arranged in the middle of the copper metal sheet, and the protrusion is flush with the surface of the sealing plate 502.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The watch based on thermoelectric power generation is characterized by comprising a watch shell, wherein a thermoelectric power generation module, a low-temperature chamber, a heat preservation chamber and a power energy storage module are arranged in the watch shell;
the thermoelectric power generation module comprises a thermoelectric power generation chip, and the cold end and the hot end of the thermoelectric power generation chip are respectively and correspondingly connected with the low-temperature chamber and the heat preservation chamber;
the low-temperature chamber is arranged at one end of the bottom cover far away from the watch shell, a radiator is arranged in the low-temperature chamber, and a first heat conduction material is filled between the radiator and the low-temperature chamber;
the heat preservation chamber is arranged at one end of the bottom cover close to the watch shell and is used for acquiring and storing heat conducted at the bottom cover of the watch shell;
the power energy storage module is electrically connected with the thermoelectric generation module and is used for supplying power to the watch.
2. The watch based on thermoelectric power generation according to claim 1, wherein a DC/DC module and a watch function module are further arranged in the watch shell, the DC/DC module is electrically connected with the thermoelectric power generation module, the power energy storage module is electrically connected with the DC/DC module, the watch function module is arranged in the heat preservation chamber, and the watch function module is electrically connected with the power energy storage module.
3. The watch based on thermoelectric generation according to claim 2, wherein the heat-preserving chamber comprises a main board gasket and two sealing plates arranged on the upper side and the lower side of the main board gasket, the outer edge of the watch functional module is connected with the main board gasket, and the watch functional module is arranged between the two sealing plates.
4. The watch based on thermoelectric power generation according to claim 3, wherein an opening is formed in the sealing plate, a second heat conducting material is arranged at the opening, and the sealing plate is made of aluminum silicate heat-insulating cotton.
5. A thermoelectric generation based wristwatch according to claim 3, wherein the main plate gasket is made of aluminum silicate heat insulation cotton material, and the sealing plate is made of heat conducting metal material.
6. The watch based on thermoelectric power generation according to claim 1, wherein a temperature sensor for detecting the body temperature is arranged in the watch case, and the temperature sensor is electrically connected with the watch function module.
7. The thermoelectric generation based wristwatch of claim 4, wherein the wristwatch case comprises a copper bottom cover, and a third heat conducting material is disposed between the second heat conducting material and the copper bottom cover.
8. The watch based on thermoelectric power generation according to claim 1, wherein the thermoelectric power generation chip, the low-temperature chamber, the heat preservation chamber and the watch function module are all made into a cuboid shape and are tightly connected together through a buckle.
9. The watch based on thermoelectric power generation according to claim 1, wherein a watch screen is arranged on the watch shell, the thermoelectric power generation chip, the DC/DC module and the power energy storage module are connected by a flat cable, and the watch screen, the low-temperature chamber, the thermoelectric power generation module and the heat preservation chamber are sequentially arranged from top to bottom.
10. The thermoelectric generation based wristwatch of claim 1, wherein the low temperature chamber comprises a heat dissipating housing for connection to a heat sink, the heat sink comprising a plurality of heat dissipating portions, the heat dissipating portions being connected to a thermally conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261556.1A CN117458913A (en) | 2023-09-27 | 2023-09-27 | Watch based on thermoelectric generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261556.1A CN117458913A (en) | 2023-09-27 | 2023-09-27 | Watch based on thermoelectric generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117458913A true CN117458913A (en) | 2024-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311261556.1A Pending CN117458913A (en) | 2023-09-27 | 2023-09-27 | Watch based on thermoelectric generation |
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| Country | Link |
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| CN (1) | CN117458913A (en) |
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2023
- 2023-09-27 CN CN202311261556.1A patent/CN117458913A/en active Pending
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