CN114078659A - Thermal expansion type thermoelectric switch - Google Patents
Thermal expansion type thermoelectric switch Download PDFInfo
- Publication number
- CN114078659A CN114078659A CN202010830990.7A CN202010830990A CN114078659A CN 114078659 A CN114078659 A CN 114078659A CN 202010830990 A CN202010830990 A CN 202010830990A CN 114078659 A CN114078659 A CN 114078659A
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- thermal expansion
- moving element
- thermal
- thermoelectric switch
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- 230000008602 contraction Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 14
- 238000005338 heat storage Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 206010057040 Temperature intolerance Diseases 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000008543 heat sensitivity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The present invention provides a thermal expansion type thermoelectric switch, including: a fixed element, a moving element, a thermal load and a thermal expansion element; the two ends of the thermal expansion element are respectively connected with the moving element and the fixed element, the fixed element and the thermal load are arranged at intervals, the moving element sequentially penetrates through the thermal expansion element and the fixed element, and the moving element is separated from or contacts with the thermal load along with the thermal expansion and contraction of the thermal expansion element. The thermal expansion type thermoelectric switch provided by the invention adopts the thermal expansion element as the connecting piece, is respectively connected with the moving element and the fixed element, and utilizes the characteristics of expansion and contraction of the thermal expansion element at high temperature and low temperature to change the distance between the thermal load and the moving element, thereby realizing the conduction and the disconnection of a current path and further controlling the automatic opening and the termination of the heating process. The thermoelectric switch has fewer components and a simple structure, does not need additional manual operation, and effectively improves the safety of the electric heat storage device controlled by the thermoelectric switch.
Description
Technical Field
The invention relates to the technical field of heat flow path control, in particular to a heat expansion type thermoelectric switch.
Background
The current energy structure is mainly based on traditional fossil energy, but the high-grade electric energy generated by burning the fossil energy has a certain instability in time or space dimension with respect to the supply and demand of a user terminal.
Therefore, energy storage technology has become an important means to solve the problem of discontinuous energy consumption at the user end and maintain the balance between supply and demand. The heat storage technology is mainly used in the fields of power system peak regulation, solar power generation, heating and the like. One of the common heat storage technologies is to use an electric heating method to heat up the heat storage material, store the heat, and release and use the heat when a specific user needs the heat at a specific time. The resistance heating technology has the hidden troubles of short circuit, overheating caused by overlong heating time, equipment damage and the like. In order to ensure the safety of the system, a thermoelectric switch is usually used or an additional PID temperature control system is added to monitor the temperature, and when the temperature is higher than a designed value, the current path is cut off, and the heating is stopped. When the temperature is lower than the design value, the current is conducted and heating is started. These are all the keys to ensuring safe operation of the electrical thermal storage apparatus.
At present, thermoelectric switches for controlling temperature based on-off control of current mainly have two types, namely a bimetallic strip type structure and a ferrite magnet type structure. However, these two structures are complicated and difficult to process, and among them, the ferrite magnet type structure cannot be automatically controlled, and the heating cannot be automatically started by pressing a key when the user uses the ceramic magnet type structure. In addition, the existing system is additionally provided with additional devices such as a thermometer, a signal receiver and the like, and the PID technology is used for temperature control adjustment, but the complexity of the system is increased.
Disclosure of Invention
The embodiment of the invention provides a thermal expansion type thermoelectric switch, which is used for simplifying the structure of the thermoelectric switch, realizing the automatic on/off heating process and ensuring the safe operation of an electric heat storage device.
An embodiment of the present invention provides a thermal expansion type thermoelectric switch, including:
a fixed element, a moving element, a thermal load and a thermal expansion element;
the two ends of the thermal expansion element are respectively connected with the moving element and the fixed element, the fixed element and the thermal load are arranged at intervals, the moving element sequentially penetrates through the thermal expansion element and the fixed element, and the moving element is separated from or contacts with the thermal load along with the thermal expansion and contraction of the thermal expansion element.
According to the thermal expansion type thermoelectric switch of one embodiment of the present invention, the moving element is disconnected from the thermal load when the temperature of the thermal expansion element is higher than a preset value.
According to the thermal expansion type thermoelectric switch of one embodiment of the present invention, the thermal expansion element thermally expands and contracts in a set temperature range, and when the thermal expansion element is expanded at a high temperature to be equal to or greater than a preset length, the moving element is separated from the thermal load.
According to the thermal expansion type thermoelectric switch of one embodiment of the present invention, when the thermal expansion element contracts to less than the preset length at a low temperature, the moving element is in contact with the thermal load.
According to the thermal expansion type thermoelectric switch of one embodiment of the present invention, a passage through which the moving element passes is provided in the thermal expansion element, and a groove for fixedly connecting the moving element is provided in the passage; the moving element passes through the passage and is connected to the thermal expansion element through the groove.
According to a thermal expansion type thermoelectric switch of an embodiment of the present invention, the moving element includes: a first transverse structure, a second transverse structure and a longitudinal structure;
the first transverse structure is fixed in the groove; the longitudinal structure is movably arranged in the channel and the fixing element, a first end of the longitudinal structure is connected with the first transverse structure, a second end of the longitudinal structure is connected with the second transverse structure, and the second transverse structure is contacted with the heat load when the temperature of the thermal expansion element is lower than a preset value.
The embodiment of the invention also provides the thermal expansion type thermoelectric switch, the fixing element is provided with a through hole matched with the longitudinal structure, the longitudinal structure is movably arranged in the through hole, and the longitudinal structure is always contacted with the side wall of the through hole.
According to the thermal expansion type thermoelectric switch of one embodiment of the present invention, the moving element and the thermal load are made of a heat conductive metal.
According to the thermal expansion type thermoelectric switch of one embodiment of the present invention, the moving element and the thermal load are made of any one of gold, silver, or copper.
According to the thermal expansion type thermoelectric switch of one embodiment of the present invention, the thermal expansion element is made of a thermal expansion material.
The thermal expansion type thermoelectric switch provided by the invention adopts the thermal expansion element as the connecting piece, is respectively connected with the moving element and the fixed element, and utilizes the characteristics of expansion and contraction of the thermal expansion element at high temperature and low temperature to change the distance between the thermal load and the moving element, thereby realizing the conduction and the disconnection of a current path and further controlling the automatic opening and the termination of the heating process. The thermoelectric switch has fewer components and a simple structure, does not need additional manual operation, and effectively improves the safety of the electric heat storage device controlled by the thermoelectric switch.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a thermal expansion type thermoelectric switch connectivity state provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of an off state of a thermal expansion thermoelectric switch provided by an embodiment of the present invention;
1. a moving element; 2. a thermal expansion element; 3. a fixing element; 4. a heat load.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A thermal expansion type thermoelectric switch provided by an embodiment of the present invention is described below with reference to fig. 1 and 2, and includes: a fixed element 3, a moving element 1, a thermal load 4 and a thermal expansion element 2.
The thermal expansion element 2 is connected at both ends to the moving element 1 and the fixed element 3, respectively, and the fixed element 3 is disposed at a distance from the thermal load 4. The moving element 1 is a member movable in the axial direction of the thermal expansion element 2, and the moving element 1 passes through the thermal expansion element 2 and the fixed element 3 in this order. The moving element 1 is separated from or brought into contact with the thermal load 4 as the thermal expansion element 2 expands and contracts with heat.
In this embodiment, when the temperature of the thermal expansion element 2 of the moving element 1 is lower than the preset value, the moving element 1 is in contact with the thermal load 4, and at this time, as shown in fig. 1, the thermoelectric switch is in a connected state. When the temperature of the thermal expansion element 2 is higher than a preset value, the moving element 1 is separated from the thermal load 4.
In the closed state of the thermal expansion thermoelectric switch provided in this embodiment, as shown in fig. 1, the moving element 1 is in contact with the thermal load 4, the electric circuit is turned on, and the electric heat storage device starts heating. Subsequently, as shown in fig. 2, as the temperature of the moving element 1 rises to the set value, heat is transferred to the thermal expansion element 2 through the moving element 1, the thermal expansion element 2 starts to expand, the moving element 1 is pushed away from the thermal load 4, the current path is broken, and the heating process is stopped. When the temperature of the moving element 1 is lower than a set value, the temperature of the thermal expansion element 2 in thermal contact with the moving element is lower, the thermal expansion element 2 begins to contract, the length is reduced, one end of the thermal expansion element 2 is connected with the fixed element 3 and cannot move, the thermal expansion element 2 drives the moving element 1 to be in contact with the thermal load 4, the current path is conducted, the electric heat storage device is started, the thermal load 4 is heated again, heat is transferred to the moving element 1, the moving element 1 is heated to the set value, the heat is transferred to the thermal expansion element 2 again through the moving element 1, the thermal expansion element 2 is heated and expanded again, and therefore automatic opening and closing can be achieved according to the thermal expansion and contraction characteristics of the thermal expansion element 2 without external manual detection and operation.
The thermal expansion type thermoelectric switch provided by the embodiment of the invention adopts the thermal expansion element as the connecting piece, is respectively connected with the moving element and the fixed element, and utilizes the characteristics of expansion and contraction of the thermal expansion element at high temperature and low temperature to change the distance between the thermal load and the moving element, thereby realizing the conduction and the disconnection of a current path and further controlling the automatic opening and the termination of the heating process. The thermoelectric switch has fewer components and a simple structure, does not need additional manual operation, and effectively improves the safety of the electric heat storage device controlled by the thermoelectric switch.
Based on the above embodiments, the present invention further provides an embodiment, as shown in fig. 1 and fig. 2, the thermal expansion element 2 is made of a thermal expansion material, such as a metal material or an organic polymer material, and the thermal expansion element 2 can be obtained by using different thermal expansion materials as connecting members to obtain a thermoelectric switch applied in different operating temperature regions. The material has the characteristics of expansion with heat and contraction with cold in a certain temperature area, and the average linear expansion coefficient or the volume expansion coefficient of the material is positive. The thermal expansion element 2 expands and contracts with heat in a set temperature range, and when the thermal expansion element 2 expands to be larger than or equal to a preset length at a high temperature, the moving element 1 is separated from the thermal load 4. When the thermal expansion element 2 contracts to less than a predetermined length at a low temperature, the moving element 1 is in contact with the thermal load 4.
Correspondingly, the heat load 4 and the moving element 1 are made of metal material with good thermal conductivity, such as gold, silver, copper (red copper).
In this embodiment, the thermal expansion element 2 is provided with a passage through which the moving element 1 passes, and the passage is provided with a groove for fixing the moving element 1. The moving element 1 passes through the passage, and the moving element 1 is connected to the thermal expansion element 2 through the groove. To ensure the reliability and sensitivity of the switch, the grooves are generally arranged at the opening of the passage, so as to avoid the thermal expansion element 2 from directly contacting with other external structures to transfer heat.
Wherein the moving element 1 comprises: a first transverse structure, a second transverse structure and a longitudinal structure. The first transverse structure is fixed in the groove for fixing the position of the entire moving element 1. The second transverse structure and the longitudinal structure are free ends, the longitudinal structure being movably arranged in the channel and the fixed element 3, the first end of the longitudinal structure being connected to the first transverse structure, the second end of the longitudinal structure being connected to the second transverse structure, and the second transverse structure being in contact with the heat load 4 when the temperature of the thermal expansion element 2 is below a preset value.
Correspondingly, the fixing element 3 is provided with a through-hole adapted to the longitudinal structure, which is movably arranged in the through-hole. The longitudinal structure is always in contact with the side walls of the through-hole throughout the contraction and expansion of the thermal expansion element 2.
In summary, in the thermal expansion thermoelectric switch provided in the embodiments of the present invention, the thermal expansion element is used as the connecting member, and is respectively connected to the moving element and the fixed element, and the distance between the thermal load and the moving element is changed by utilizing the characteristics of expansion and contraction of the thermal expansion element at a high temperature and a low temperature, so as to achieve the on and off of the current path, and further control the automatic on and off of the heating process.
In addition, the structure is different from the prior art which only comprises four parts, namely a fixed element, a moving element, a heat load and a thermal expansion element, the structure is simple and reliable, the automatic starting and ending of the heating process can be realized by utilizing the heat sensitivity of the thermal expansion material, no additional manual operation is needed, the safety of the electric heat storage device controlled by the structure is effectively improved, and the overheating fault is avoided.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A thermal expansion type thermoelectric switch, comprising:
a fixed element, a moving element, a thermal load and a thermal expansion element;
the two ends of the thermal expansion element are respectively connected with the moving element and the fixed element, the fixed element and the thermal load are arranged at intervals, the moving element sequentially penetrates through the thermal expansion element and the fixed element, and the moving element is separated from or contacts with the thermal load along with the thermal expansion and contraction of the thermal expansion element.
2. The thermal expansion thermoelectric switch according to claim 1, wherein the moving element is disconnected from the thermal load when a temperature of the thermal expansion element is higher than a preset value.
3. The thermally expandable thermoelectric switch according to claim 1, wherein said thermal expansion element thermally expands and contracts in a set temperature range, and wherein said moving element is separated from said thermal load when said thermal expansion element is expanded at a high temperature to a preset length or more.
4. The thermal expansion thermoelectric switch according to claim 3, wherein the moving element is in contact with the thermal load when the thermal expansion element contracts to less than a preset length at a low temperature.
5. A thermal expansion type thermoelectric switch according to any one of claims 1 to 4, wherein a passage through which said moving element passes is provided in said thermal expansion element, and a groove for fixedly connecting said moving element is provided in said passage; the moving element passes through the passage and is connected to the thermal expansion element through the groove.
6. The thermal expansion thermoelectric switch according to claim 5, wherein the moving element comprises: a first transverse structure, a second transverse structure and a longitudinal structure;
the first transverse structure is fixed in the groove; the longitudinal structure is movably arranged in the channel and the fixing element, a first end of the longitudinal structure is connected with the first transverse structure, a second end of the longitudinal structure is connected with the second transverse structure, and the second transverse structure is contacted with the heat load when the temperature of the thermal expansion element is lower than a preset value.
7. A heat-expandable thermoelectric switch according to claim 6, wherein said fixing member is provided with a through hole adapted to said longitudinal structure, said longitudinal structure is movably provided in said through hole, and said longitudinal structure is always in contact with a side wall of said through hole.
8. The thermal expansion thermoelectric switch according to claim 1, wherein the moving element and the thermal load are made of a heat conductive metal.
9. The thermal expansion thermoelectric switch according to claim 8, wherein the moving element and the thermal load are made of any one of gold, silver, or copper.
10. The thermal expansion thermoelectric switch according to claim 1, wherein the thermal expansion element is made of a thermal expansion material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830990.7A CN114078659A (en) | 2020-08-18 | 2020-08-18 | Thermal expansion type thermoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010830990.7A CN114078659A (en) | 2020-08-18 | 2020-08-18 | Thermal expansion type thermoelectric switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114078659A true CN114078659A (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010830990.7A Pending CN114078659A (en) | 2020-08-18 | 2020-08-18 | Thermal expansion type thermoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114078659A (en) |
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2020
- 2020-08-18 CN CN202010830990.7A patent/CN114078659A/en active Pending
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