Self-regulating thermal insulation and related methods

Patent metadata

Field	Value
Publication number	US-10386131-B2
Application number	US-201514941066-A
Country	US
Kind code	B2
Filing date	Nov 13, 2015
Priority date	Nov 13, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

Presently disclosed self-regulating thermal insulation may include one or more thermal actuators that may expand and contract in response to changes in temperature adjacent the thermal insulation, thereby automatically changing the thermal resistance of the thermal insulation. In this manner, a self-regulating thermal insulation may be configured to locally adjust in response to local changes in temperature of a part being insulated, for example, during curing or some other manufacturing process. Such self-regulating thermal insulation may be configured to respond to temperature changes without feedback control systems, power, or human intervention. One example of self-regulating thermal insulation may include a first plate, a second plate, a support structure coupling the first plate and the second plate and defining an insulation thickness therebetween, an internal partition positioned between the first plate and the second plate, and at least one thermal actuator positioned between the second plate and the internal partition.

First claim

The invention claimed is:

1. A self-regulating thermal insulation, comprising:
a first plate having a first outer surface and a first inner surface;
a second plate having a second outer surface and a second inner surface, the second inner surface facing the first inner surface of the first plate;
a support structure coupling the first plate to the second plate, the support structure being configured to position the first plate with respect to the second plate such that the first plate is separated from the second plate by an insulation thickness;
an internal partition positioned between the first plate and the second plate; and
a thermal actuator coupled to the second inner surface of the second plate adjacent a second actuator end, wherein the thermal actuator is coupled to the internal partition at a first actuator end, wherein the thermal actuator is configured to automatically move the internal partition with respect to the first plate and the second plate in response to a change in a temperature adjacent one or more of the first outer surface of the first plate and the second outer surface of the second plate, thereby changing a thermal resistance of the self-regulating thermal insulation.

2. The self-regulating thermal insulation according to claim 1 , wherein the internal partition comprises a plurality of internal partitions, each of the internal partitions of the plurality of internal partitions being spaced apart from one another and positioned between the first plate and the second plate.

3. The self-regulating thermal insulation according to claim 2 , wherein the thermal actuator comprises a plurality of thermal actuators, wherein at least a first thermal actuator of the plurality of thermal actuators is positioned between the second plate and a first internal partition of the plurality of internal partitions, and wherein at least a second actuator of the plurality of thermal actuators is positioned between the first internal partition and a second internal partition of the plurality of internal partitions.

4. The self-regulating thermal insulation according to claim 2 , wherein the self-regulating thermal insulation is configured to transition through a continuum of configurations between a first configuration and a second configuration in response to the change in the temperature adjacent one or more of the first outer surface of the first plate and the second outer surface of the second plate, wherein the self-regulating thermal insulation automatically transitions towards the second configuration in response to an increase in temperature adjacent the second outer surface of the second plate, wherein, in the first configuration, each internal partition of the plurality of internal partitions is substantially equally spaced apart from a respective adjacent internal partition by a first distance, wherein, in the second configuration, each internal partition of the plurality of internal partitions is substantially equally spaced apart from a respective adjacent internal partition by a second distance, wherein the second distance is less than the first distance between respective internal partitions in the first configuration, and wherein, in the second configuration, the thermal resistance of the self-regulating thermal insulation is decreased as compared to the thermal resistance in the first configuration.

5. The self-regulating thermal insulation according to claim 1 , wherein the thermal actuator is configured to automatically contract in response to an increase in temperature adjacent the second outer surface of the second plate, and automatically expand in response to a decrease in temperature adjacent the second outer surface of the second plate.

6. The self-regulating thermal insulation according to claim 1 , wherein the thermal actuator comprises a bi-metallic actuator comprising a plurality of contiguous first segments comprising a first metal and a plurality of second segments comprising a second metal, the plurality of second segments being spaced apart and coupled to the plurality of contiguous first segments.

7. The self-regulating thermal insulation according to claim 1 , wherein the self-regulating thermal insulation is configured such that the thermal resistance of the self-regulating thermal insulation automatically decreases in response to an increase in a temperature adjacent the second outer surface of the second plate.

8. The self-regulating thermal insulation according to claim 1 , wherein the self-regulating thermal insulation is configured such that movement of the internal partition with respect to the first plate and the second plate changes natural convection conditions of the self-regulating thermal insulation.

9. A self-regulating thermal insulation, comprising:
a first plate having a first outer surface and a first inner surface;
a second plate having a second outer surface and a second inner surface, the second inner surface facing the first inner surface of the first plate;
a support structure coupling the first plate to the second plate, the support structure being configured to position the first plate with respect to the second plate such that the first plate is separated from the second plate by an insulation thickness;
an internal partition positioned between the first plate and the second plate, wherein the internal partition is coupled to the support structure such that it is substantially stationary with respect to the first plate and the second plate; and
a thermal actuator coupled to the second inner surface of the second plate adjacent a second actuator end of the thermal actuator, wherein the thermal actuator is configured to automatically move with respect to the internal partition in response to a change in a temperature adjacent one or more of the first outer surface of the first plate and the second outer surface of the second plate, thereby changing a thermal resistance of the self-regulating thermal insulation.

10. The self-regulating thermal insulation according to claim 9 , wherein the self-regulating thermal insulation is configured to transition through a continuum of configurations between a first configuration and a second configuration in response to the change in the temperature adjacent one or more of the first outer surface of the first plate and the second outer surface of the second plate, wherein the self-regulating thermal insulation automatically transitions towards the second configuration in response to an increase in temperature adjacent the second outer surface of the second plate, and wherein, in the second configuration, the thermal resistance of the self-regulating thermal insulation is decreased as compared to the thermal resistance in the first configuration.

11. The self-regulating thermal insulation according to claim 10 , wherein, in the first configuration, the self-regulating thermal insulation is configured such that substantially no thermal conduction occurs between the second plate and the internal partition, wherein, in the first configuration, a first actuator end of the thermal actuator is free from contact with the internal partition, and wherein, in the second configuration, the first actuator end of the thermal actuator contacts the internal partition, thereby permitting thermal conduction between the second plate and the internal partition.

12. The self-regulating thermal insulation according to claim 9 , wherein the thermal actuator is configured to automatically expand in response to an increase in temperature adjacent the second outer surface of the second plate, and automatically contract in response to a decrease in temperature adjacent the second outer surface of the second plate.

Assignees

• Boeing Co

Inventors

• Hull John Ralph
• Chen Cameron K

Classifications

• F16L59/06

  Arrangements using an air layer or vacuum · CPC title

• F28F2013/008

  Variable conductance materials; Thermal switches · CPC title

• B23P19/00

  Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation {(connecting metal parts or objects by metal-working procedures B21J, B23K)}; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) · CPC title

• F16L59/026 Primary

  Mattresses, mats, blankets or the like · CPC title

• F28F13/00 Primary

  Arrangements for modifying heat-transfer, e.g. increasing, decreasing (F28F1/00 - F28F11/00 take precedence) · CPC title