CN211605017U - Temperature control switch and temperature control device - Google Patents
Temperature control switch and temperature control device Download PDFInfo
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- CN211605017U CN211605017U CN201921998829.XU CN201921998829U CN211605017U CN 211605017 U CN211605017 U CN 211605017U CN 201921998829 U CN201921998829 U CN 201921998829U CN 211605017 U CN211605017 U CN 211605017U
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- 229910001338 liquidmetal Inorganic materials 0.000 claims description 22
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 12
- 229910052733 gallium Inorganic materials 0.000 claims description 12
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229910000846 In alloy Inorganic materials 0.000 claims description 4
- RHZWSUVWRRXEJF-UHFFFAOYSA-N indium tin Chemical compound [In].[Sn] RHZWSUVWRRXEJF-UHFFFAOYSA-N 0.000 claims description 4
- 238000009736 wetting Methods 0.000 claims description 4
- PSMFTUMUGZHOOU-UHFFFAOYSA-N [In].[Sn].[Bi] Chemical compound [In].[Sn].[Bi] PSMFTUMUGZHOOU-UHFFFAOYSA-N 0.000 claims description 3
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
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- 229910052802 copper Inorganic materials 0.000 description 4
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Abstract
The present application relates to a temperature control switch and a temperature control device. Wherein, this temperature control switch includes: a container, a first electrode and a second electrode; wherein, the container comprises a liquid storage cavity, and conductive fluid is arranged in the liquid storage cavity; the first electrode and the second electrode are arranged in the container in a non-contact manner; the first electrode and the second electrode are arranged at positions where the first electrode and the second electrode can be in contact with the liquid level of the conductive fluid after the conductive fluid is heated and expanded, and at least one of the first electrode and the second electrode can be separated from the liquid level of the conductive fluid after the conductive fluid is contracted when the conductive fluid is cooled. Through the application, the problem that the switch control performance is inaccurate due to mechanical fatigue in the related art is solved, and the stability of the temperature control switch is improved.
Description
Technical Field
The application relates to the field of intelligent electronic equipment, in particular to a temperature control switch and a temperature control device.
Background
With the development of the electronic control field, the switching device plays an increasingly important role in the system circuit, and at the same time, higher requirements are put on the performance of the switch. On one hand, the system circuit requires a long service life of the switch so as to be used repeatedly; on the other hand, the switch is required to have stable performance even when used for a long time, so that the switch can be accurately controlled.
One of the switches in the related art is a switch that uses a bimetal as a temperature sensing element according to a mechanical principle, and controls the action of internal stress of the bimetal by changing the temperature, so as to open/close a contact, thereby achieving the purpose of switching on/off a circuit. By adopting the switch in the mode, in order to ensure the temperature sensing effect, the temperature sensing surface needs to be coated with heat conduction silicone grease or other heat conduction media with similar performances, the top of the metal cover surface is likely to be crushed, loosened or deformed due to the action of external force during installation, the bimetallic strip is switched back and forth under the opening or closing state under the action of internal stress, and the switch can be inaccurate in control performance due to mechanical fatigue after long-time use.
In other related arts, there is also a problem that the switching control performance is inaccurate due to mechanical fatigue. For example, a micro liquid metal switch with a flexible structure is composed of a base body, an upper liquid storage tank, a lower liquid storage tank, liquid metal, a liquid metal through flow channel, an air flow channel, a top surface sealing film, a bottom surface sealing film, a side surface sealing film and an external electrode. In addition, the switch adopting the mode has higher requirement on the base material and is complex to realize.
In summary, no effective solution has been proposed for the problem of inaccurate switch control performance caused by mechanical fatigue of the temperature control switch in the related art.
Disclosure of Invention
Based on this, the application provides a temperature control switch and temperature control device for solve the temperature control switch among the correlation technique and lead to the inaccurate problem of switch control performance because of mechanical fatigue.
In a first aspect, the present application provides a temperature control switch comprising: a container, a first electrode and a second electrode; wherein,
the container comprises a liquid storage cavity, and conductive fluid is arranged in the liquid storage cavity;
the first electrode and the second electrode are arranged in the container in a mutually non-contact manner;
the first electrode and the second electrode are arranged at positions where the first electrode and the second electrode can be in contact with the liquid level of the conductive fluid after the conductive fluid is heated and expanded, and at least one of the first electrode and the second electrode is arranged at a position where the conductive fluid can be separated from the liquid level of the conductive fluid after the conductive fluid is contracted when cooled.
In a possible implementation manner, the container further comprises a liquid storage pipe, the liquid storage pipe is arranged at the top of the liquid storage cavity and is communicated with the liquid storage cavity, and the cross-sectional area of the liquid storage pipe is smaller than that of the liquid storage cavity; the first electrode and the second electrode are arranged in the liquid storage pipe in a mutual non-contact mode.
In one possible implementation, the top end of the reservoir tube is closed, and the first electrode and the second electrode extend into the reservoir tube from the top end of the reservoir tube without contacting each other.
In one possible implementation, the interior of the container is filled with a shielding gas.
In one possible implementation, the conductive fluid includes: a liquid metal.
In one possible implementation, the liquid metal comprises one of: gallium, gallium indium alloy, gallium indium tin alloy, bismuth indium tin alloy.
In one possible implementation, the container is made of glass or an organic polymer material having plasticity and insulation properties.
In one possible implementation, the first electrode and the second electrode are both made of a material that is non-wetting with the conductive fluid, or are treated on the outer surfaces of the first electrode and the second electrode such that the conductive fluid does not wet the first electrode and the second electrode.
In one possible implementation, the temperature control switch further includes: the container comprises a first external electrode and a second external electrode, wherein the first external electrode is electrically connected with the first electrode, the second external electrode is electrically connected with the second electrode, and the first external electrode and the second external electrode are exposed outside the container.
In a second aspect, the present application provides a temperature control device, characterized in that the temperature control device comprises the temperature control switch of the first aspect.
According to the temperature control switch and the temperature control device, when the temperature rises, the conductive fluid in the container of the temperature control switch is heated to expand, the liquid level of the conductive fluid rises, the liquid level of the conductive fluid is in contact with the first electrode and the second electrode, and the first electrode is communicated with the second electrode; when the temperature is reduced, the conductive fluid in the container of the temperature control switch shrinks when being cooled, the liquid level of the conductive fluid is reduced, the liquid level of the conductive fluid is separated from at least one of the first electrode and the second electrode, and the first electrode and the second electrode are disconnected, so that the on-off control according to the temperature change is realized. Through the temperature control switch and the temperature control device, the problem that the switch control performance of the temperature control switch in the related technology is inaccurate due to mechanical fatigue is solved, and the stability of the temperature control switch is improved.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a first schematic cross-sectional view of a temperature control switch according to an embodiment of the present application;
FIG. 2 is a schematic sectional view of a temperature control switch according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view III of a temperature control switch according to an embodiment of the present application;
FIG. 4 is a fourth schematic sectional view of a temperature controlled switch according to an embodiment of the present application;
fig. 5 is a schematic cross-sectional view of a temperature controlled switch according to an embodiment of the present application in an on/off state.
The reference numbers in the figures are as follows:
a container 1; a first electrode 2; a second electrode 3; a liquid storage cavity 4; a liquid storage pipe 5; an electrically conductive fluid 6; the level 7 of the conductive fluid; a top end 8 of the reservoir tube; a first external electrode 9; a second external electrode 10; conducting position 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other examples, which can be obtained by a person skilled in the art without making any inventive step based on the examples in this application, are within the scope of protection of this application.
In the present embodiment, a temperature control switch is provided. Fig. 1 is a schematic cross-sectional view of a temperature control switch according to an embodiment of the present application, referring to fig. 1, the temperature control switch including: a container 1, a first electrode 2 and a second electrode 3; wherein, the container 1 comprises a liquid storage cavity 4, and a conductive fluid 6 is arranged in the liquid storage cavity 4; the first electrode 2 and the second electrode 3 are arranged in the container 1 in a mutually non-contact manner; the first electrode 2 and the second electrode 3 are arranged at positions where the first electrode 2 and the second electrode 3 can be in contact with the liquid level of the conductive fluid 6 after the conductive fluid 6 is heated and expanded, and at least one of the first electrode 2 and the second electrode 3 is arranged at a position where the conductive fluid 6 can be separated from the liquid level 7 of the conductive fluid 6 after the conductive fluid 6 is contracted when cooled.
In the above embodiment, when the temperature of the conductive fluid 6 rises, the liquid level 7 of the conductive fluid 6 rises due to thermal expansion of the conductive fluid 6 inside the container 1, the liquid level 7 of the conductive fluid 6 contacts the first electrode 2 and the second electrode 3, and the first electrode 2 and the second electrode 3 are conducted. When the temperature of the conductive fluid 6 is reduced, the conductive fluid 6 in the liquid storage cavity 4 of the container 1 is contracted due to cooling, so that the liquid level 7 of the conductive fluid 6 is reduced, the liquid level 7 of the conductive fluid 6 is separated from at least one of the first electrode 2 and the second electrode 3, the first electrode 2 and the second electrode 3 are disconnected, and the on-off control according to the temperature change is realized. Through the temperature control switch and the temperature control device, the problem that the switch control performance of the temperature control switch in the related technology is inaccurate due to mechanical fatigue is solved, and the stability of the temperature control switch is improved.
Compared with a mechanical switch in the related art, the temperature control switch adopted by the application has the advantages that on one hand, the conduction and the disconnection of the first electrode 2 and the second electrode 3 are controlled by adopting the conductivity and the expansion and contraction properties of the conductive fluid 6, the problem that the mechanical temperature control switch in the related art is inaccurate in switch control performance due to mechanical fatigue can be solved, and the stability of the temperature control switch is improved. On the other hand, the temperature control switch of the application is simple in structure and reliable in implementation. In addition, the change in the expansion and contraction of the volume of the conductive fluid itself enables the switch to have a longer service life than the mechanical movement of the metal contacts in the mechanical temperature control switch of the related art.
As an implementable solution, fig. 2 is a schematic cross-sectional view of a temperature control switch according to an embodiment of the present application, referring to fig. 2, the container 1 further includes a reservoir 5, the reservoir 5 is disposed on top of the reservoir 4 and is communicated with the reservoir 4, and the cross-sectional area of the reservoir 5 is smaller than the cross-sectional area of the reservoir 4; the first electrode 2 and the second electrode 3 are provided in the reservoir 5 in a non-contact manner with each other.
Wherein, the cross-sectional areas of the two are the cross-sectional areas obtained by cutting the liquid storage pipe 5 and the liquid storage cavity 4 along the horizontal direction by a plane when the container is horizontally placed. For the cross-sectional area of the liquid storage pipe 5 is equal to or larger than the cross-sectional area of the liquid storage cavity 4, in the embodiment, when the conductive fluid 6 expands when heated or contracts when cooled to the same volume, the movement range of the liquid level 7 of the conductive fluid 6 in the liquid storage pipe 5 is larger, a larger distance between the liquid level 7 of the conductive fluid 6 and the electrode when the temperature control switch is disconnected is ensured, the error connection of the first electrode 2 and the second electrode 3 caused by vibration or other reasons is avoided, and the on-off reliability of the temperature control switch is improved.
As an implementable solution, fig. 3 is a schematic cross-sectional view of another temperature controlled switch according to an embodiment of the present application, the temperature controlled switch shown in fig. 3 being substantially the same as the temperature controlled switch shown in fig. 1 except that the top end 8 of the reservoir 5 is closed and the first electrode 2 and the second electrode 3 extend from the top end 8 of the reservoir 5 into the reservoir 5 without contacting each other. The top end 8 of the liquid storage tube 5 is sealed, so that the conductive fluid 6 can be prevented from leaking; on the other hand, evaporation or oxidation of the conductive fluid 6 can also be avoided.
In order to further prevent the oxygen remaining in the sealed reservoir tube 5 from oxidizing the conductive fluid 6, the air inside the container 1 may be completely evacuated to form a vacuum, or a shielding gas may be filled into the container to shield the conductive fluid 6. The shielding gas filled in the container in the present application may be an inert gas or other inert gas that is chemically stable in itself and does not oxidize the conductive fluid and the electrode, including but not limited to at least one of: helium, nitrogen, hydrogen, and the like.
As an implementable solution, the conductive fluid 6 in the present application is a liquid metal. The liquid metal has good conductivity, fluidity and properties of expansion with heat and contraction with cold, and is suitable for temperature control switches. The liquid metal in the present application comprises one of the following: gallium, gallium indium alloy, gallium indium tin alloy, bismuth indium tin alloy. For example, gallium Ga has a melting point of about 30 ℃, a common gallium indium alloy has a melting point of about 15 ℃, and a common gallium indium tin alloy has a melting point of about 6-10 ℃. According to the application environment requirement of the temperature control switch, corresponding liquid metal can be adopted as the conductive fluid of the temperature control switch. In addition, pollution-free liquid metal is adopted in the practical implementation scheme of the application, which is beneficial to environmental protection.
As a practical aspect, the container 1 is made of glass or an organic polymer material having plasticity and insulation properties. On the one hand, the electrode is easy to form and manufacture by adopting a plastic material, and on the other hand, the electrode is prevented from being mistakenly connected with the container 1 due to mistaken contact by adopting an insulating material.
During the transition of the temperature controlled switch from the on-state to the off-state, it is necessary to separate the conductive fluid 6 from at least one of the first electrode 2 and the second electrode 3. However, if the conductive fluid 6 easily infiltrates the first electrode 2 and the second electrode 3 after the liquid level 7 of the conductive fluid 6 falls, the conductive fluid 6 may be adsorbed on the surfaces of the first electrode 2 and the second electrode 3, and if the conductive fluid 6 is located between the first electrode 2 and the second electrode 3, the first electrode 2 and the second electrode 3 may be kept conductive. Therefore, in order to avoid the adsorption of the conductive fluid 6 on the surfaces of the first electrode 2 and the second electrode 3, as an implementable scheme, the first electrode 2 and the second electrode 3 are both made of a material that is non-wetting with the conductive fluid 6, or the outer surfaces of the first electrode 2 and the second electrode 3 are processed so that the conductive fluid 6 does not wet the first electrode 2 and the second electrode 3, thereby avoiding the adsorption of the conductive fluid 6 on the surfaces of the first electrode 2 and the second electrode 3, and further improving the accuracy of the on-off control of the temperature control switch.
These materials that are non-low wetting with the conductive fluid 6 include, but are not limited to, at least one of the following: copper, silver, gold. As an implementation, the first electrode and the second electrode may be made of copper, silver or gold, and may also be made of an alloy material including at least copper, silver or gold. Meanwhile, the electrode made of copper, silver, gold or alloy materials thereof has stable chemical properties, and can avoid the influence on the switching performance caused by chemical reaction with the conductive fluid 6.
As an implementable solution, fig. 4 is a schematic cross-sectional view of another temperature control switch according to an embodiment of the present application, and referring to fig. 4, the temperature control switch further includes: a first external electrode 9 and a second external electrode 10, wherein the first external electrode 9 is electrically connected to the first electrode 2, the second external electrode 10 is electrically connected to the second electrode 3, and the first external electrode 9 and the second external electrode 10 are exposed to the outside of the container 1. The first external electrode 9 and the second external electrode 10 are used for connecting with other external circuits, including but not limited to alarm, heating, control, on-off, regulation and other circuits.
In this embodiment, there is also provided a temperature control device including any one of the temperature control switches described above.
The present application will be described below in accordance with a preferred embodiment, and fig. 5 is a schematic sectional view of a temperature control switch according to an example of the present application, referring to fig. 5, which includes a non-conductive capacitor 1, a conductive positive electrode 2, a conductive negative electrode 3, a liquid metal 6, a first external electrode 9, and a second external electrode 10. The conductive anode 2 is connected with a first external electrode 9, and the conductive cathode 3 is connected with a second external electrode 10. The conductive anode 2 and the conductive cathode 3 are respectively connected with an additional circuit system through a first external electrode 9 and a second external electrode 10, and the on-off of the additional circuit system can be controlled.
When the container 1 is in a normal temperature environment, the liquid level 7 of the liquid metal 6 is not in contact with the conductive anode 2 and the conductive cathode 3, the conductive anode 2 and the conductive cathode 3 are in an off state at the moment, and an additional circuit connected with the conductive anode 2 and the conductive cathode 3 is in an off state.
When the external temperature of the container 1 rises, the volume of the liquid metal 6 can be increased due to the expansion and contraction effect of the liquid metal 6, when the temperature rises to a preset temperature, the liquid level of the liquid metal 6 rises to the conducting position 11 and is simultaneously contacted with the conductive anode 2 and the conductive cathode 3, and the conductive anode 2 and the conductive cathode 3 are in a conducting state due to the conductivity of the liquid metal 6, and at the moment, an additional circuit system connected with the conductive anode 2 and the conductive cathode 3 is conducted.
When the external temperature of the container 1 is reduced, the volume of the liquid metal 6 is reduced due to the expansion and contraction effect of the liquid metal 6, when the temperature is reduced to be lower than the preset temperature, the liquid level of the liquid metal 6 is reduced to be lower than 11 until the liquid level is separated from the conductive anode 2 and the conductive cathode 3, the conductive anode 2 and the conductive cathode 3 are in an off state, and at the moment, an external circuit connected with the conductive anode 2 and the conductive cathode 3 is disconnected.
In the above embodiment, the conducting position 11 on the wall of the container 1 can be calibrated by experiment, so that when the temperature reaches or is higher than the set temperature, the liquid level of the liquid metal 6 rises to the conducting position 11, and the conducting anode 2 and the conducting cathode 3 are conducted. Through the mode of experimental calibration, the influence of the volume change of the container 1 caused by the expansion and contraction effect of heat on the container 1 can be eliminated.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A temperature control switch, characterized in that the temperature control switch comprises: a container, a first electrode and a second electrode; wherein,
the container comprises a liquid storage cavity, and conductive fluid is arranged in the liquid storage cavity;
the first electrode and the second electrode are arranged in the container in a mutually non-contact manner;
the first electrode and the second electrode are arranged at positions where the first electrode and the second electrode can be in contact with the liquid level of the conductive fluid after the conductive fluid is heated and expanded, and at least one of the first electrode and the second electrode is arranged at a position where the conductive fluid can be separated from the liquid level of the conductive fluid after the conductive fluid is contracted when cooled.
2. The temperature control switch of claim 1, wherein the container further comprises a reservoir tube, the reservoir tube is disposed at a top of the reservoir chamber and is in communication with the reservoir chamber, and a cross-sectional area of the reservoir tube is smaller than a cross-sectional area of the reservoir chamber; the first electrode and the second electrode are arranged in the liquid storage pipe in a mutual non-contact mode.
3. The temperature controlled switch of claim 2, wherein the top end of the reservoir tube is closed, and the first electrode and the second electrode extend from the top end of the reservoir tube into the reservoir tube without contacting each other.
4. The temperature controlled switch of claim 1, wherein the interior of the container is filled with a shielding gas.
5. The temperature controlled switch of claim 1, wherein the electrically conductive fluid comprises: a liquid metal.
6. The temperature controlled switch of claim 5, wherein the liquid metal comprises one of: gallium, gallium indium alloy, gallium indium tin alloy, bismuth indium tin alloy.
7. The temperature control switch according to claim 1, wherein the container is made of glass or an organic polymer material having plasticity and insulation properties.
8. The temperature controlled switch of claim 1, wherein the first and second electrodes are each made of a material that is non-wetting with the conductive fluid or are treated on outer surfaces of the first and second electrodes such that the conductive fluid does not wet the first and second electrodes.
9. The temperature controlled switch according to any one of claims 1 to 8, further comprising: the container comprises a first external electrode and a second external electrode, wherein the first external electrode is electrically connected with the first electrode, the second external electrode is electrically connected with the second electrode, and the first external electrode and the second external electrode are exposed outside the container.
10. A temperature control device, characterized in that it comprises a temperature control switch according to any one of claims 1 to 9.
Priority Applications (1)
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CN201921998829.XU CN211605017U (en) | 2019-11-18 | 2019-11-18 | Temperature control switch and temperature control device |
Applications Claiming Priority (1)
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CN201921998829.XU CN211605017U (en) | 2019-11-18 | 2019-11-18 | Temperature control switch and temperature control device |
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CN211605017U true CN211605017U (en) | 2020-09-29 |
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