Thermal switch
阅读说明:本技术 热开关 (Thermal switch ) 是由 陈琦 于小龙 于 2019-10-10 设计创作,主要内容包括:本发明提供了一种热开关,包括外壳组件和安装在所述外壳组件之内的热开关主体,所述外壳组件包括上端面、隔热结构和基底,所述隔热结构设置在所述基底、上端面之间以分隔所述基底、上端面的热传导,所述热开关主体包括温度敏感驱动器、棘轮棘爪机构、驱动柱和柔性导热索,所述温度敏感驱动器通过所述棘轮棘爪机构与所述驱动柱连接,所述驱动柱通过所述柔性导热索与所述基底连接。本发明的有益效果是:简化了热开关的结构,无功耗,无电路要求,为热环境变化剧烈的航天器提供了有效的热控手段。(The invention provides a thermal switch, which comprises a shell assembly and a thermal switch main body installed in the shell assembly, wherein the shell assembly comprises an upper end face, a heat insulation structure and a substrate, the heat insulation structure is arranged between the substrate and the upper end face to separate the heat conduction of the substrate and the upper end face, the thermal switch main body comprises a temperature sensitive driver, a ratchet and pawl mechanism, a driving column and a flexible heat conducting cable, the temperature sensitive driver is connected with the driving column through the ratchet and pawl mechanism, and the driving column is connected with the substrate through the flexible heat conducting cable. The invention has the beneficial effects that: the structure of the thermal switch is simplified, no power consumption is caused, no circuit requirement is required, and an effective thermal control means is provided for the spacecraft with violent thermal environment change.)
1. A thermal switch, characterized by: comprising a housing assembly and a thermal switch body mounted within the housing assembly, the housing assembly comprising an upper end face, a thermal insulation structure and a substrate, the heat insulation structure is arranged between the substrate and the upper end face to separate the heat conduction of the substrate and the upper end face, the thermal switch main body comprises a temperature sensitive driver, a ratchet wheel and pawl mechanism, a driving column and a flexible heat conducting cable, the temperature sensitive driver is connected with the driving column through the ratchet wheel and pawl mechanism, the driving column is connected with the substrate through the flexible heat conducting cable, the driving column and the substrate are a moving pair, the temperature sensitive driver drives the driving column to reciprocate between a first position and a second position through a ratchet wheel and pawl mechanism, the first position is that the driving column is not in contact with the upper end face, and the second position is that the driving column is in contact with the upper end face.
2. The thermal switch of claim 1, wherein: the temperature sensitive driver is in thermally conductive connection with the substrate.
3. The thermal switch of claim 2, wherein: the temperature sensitive driver mainly comprises a bimetallic strip, a corrugated pipe or an elastic element filled with liquid, is sensitive to temperature, and can deform when the temperature changes so as to generate driving force.
4. The thermal switch of claim 1, wherein: the ratchet wheel and pawl mechanism comprises a ratchet wheel and a pawl, the ratchet wheel is connected with the temperature sensitive driver, and the pawl is connected with the driving column.
5. The thermal switch of claim 4, wherein: the pawl is perpendicular to the moving axis of the driving column, and the pawl is in sliding fit with the tooth surface of the ratchet wheel.
6. The thermal switch of claim 1, wherein: the substrate is mounted at a heat source end.
7. The thermal switch of claim 1, wherein: at least one flexible heat conducting cable is arranged, and the flexible heat conducting cables are mainly formed by laminating a plurality of layers of high-heat-conducting graphite films.
8. The thermal switch of claim 1, wherein: the base is provided with a guide groove, and the driving column is arranged in the guide groove.
Technical Field
The invention relates to a switch, in particular to a thermal switch.
Background
With the development of the spacecraft towards the large-scale track maneuver orbital transfer, multi-working mode and microminiaturization, the spacecraft puts forward higher requirements on a thermal control system. A thermal switch is a thermal control device capable of making and breaking a thermal connection between two components, which can automatically make or break a heat transfer path as needed. The thermal switch technology has an important role in solving the difficult problem of spacecraft thermal control design which needs frequent maneuvering or drastic external environment change, can passively control the temperature of electronic equipment, reduces the requirements on power and control circuits and software, and has important significance in optimizing the thermal control of the spacecraft.
The existing thermal switch has various working principles and a generally complex structure.
Disclosure of Invention
To solve the problems in the prior art, the present invention provides a thermal switch.
The invention provides a thermal switch comprising a housing assembly and a thermal switch body mounted within the housing assembly, the housing assembly includes an upper end face, a thermal insulation structure disposed between the substrate and the upper end face to separate thermal conduction from the substrate and the upper end face, the thermal switch main body comprises a temperature sensitive driver, a ratchet wheel and pawl mechanism, a driving column and a flexible heat conducting cable, the temperature sensitive driver is connected with the driving column through the ratchet wheel and pawl mechanism, the driving column is connected with the substrate through the flexible heat conducting cable, the driving column and the substrate are a moving pair, the temperature sensitive driver drives the driving column to reciprocate between a first position and a second position through a ratchet wheel and pawl mechanism, the first position is that the driving column is not in contact with the upper end face, and the second position is that the driving column is in contact with the upper end face.
As a further development of the invention, the temperature-sensitive actuator is connected in a thermally conductive manner to the substrate.
As a further improvement of the invention, the temperature sensitive driver mainly comprises a bimetallic strip, a corrugated pipe or an elastic element filled with liquid, is sensitive to temperature and can deform when the temperature changes so as to generate driving force.
As a further improvement of the present invention, the ratchet-pawl mechanism comprises a ratchet wheel connected to the temperature sensitive driver and a pawl connected to the drive column.
As a further improvement of the invention, the pawl is perpendicular to the moving axis of the driving column, and the pawl is in sliding fit with the tooth surface of the ratchet wheel.
As a further improvement of the invention, the substrate is mounted on a heat source side.
As a further improvement of the invention, at least one flexible heat conducting cable is arranged, and the flexible heat conducting cable is mainly formed by laminating multiple layers of high heat conducting graphite films.
As a further improvement of the invention, the base is provided with a guide groove, and the driving column is arranged in the guide groove.
The invention has the beneficial effects that: through the scheme, the structure of the thermal switch is simplified, no power consumption is caused, no circuit requirement is required, and an effective thermal control means is provided for the spacecraft with violent thermal environment change.
Drawings
Fig. 1 is an open schematic of a thermal switch of the present invention.
Fig. 2 is a schematic diagram of the closing of a thermal switch of the present invention.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 to 2, a thermal switch comprises a housing assembly and a thermal switch main body mounted in the housing assembly, wherein the housing assembly comprises an
As shown in fig. 1 to 2, the temperature-sensitive driver is thermally connected to the
As shown in fig. 1 to 2, the temperature sensitive actuator is mainly composed of a bimetal, a bellows, or an elastic element filled with liquid, is sensitive to temperature, and deforms when the temperature changes to generate a driving force.
As shown in fig. 1 to 2, the ratchet-pawl mechanism comprises a
As shown in fig. 1 to 2, the
As shown in fig. 1 to 2, the
As shown in fig. 1 to 2, a plurality of flexible heat conducting
As shown in fig. 1 to 2, the
According to the thermal switch provided by the invention, the
The thermal switch provided by the invention is a novel thermal switch, the
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
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