The present invention relates to improvements in the containers for phase change material (PCM) and methods of using specialized containers for PCM to increase the efficacy of the PCM's temperature mitigating properties.
Phase Change Material (PCM) has existed for quite a while now, but the use of PCM in conditioned spaces for its air temperature regulating properties is a relatively recent development. Containers capable of holding PCM exist, but specialized containers for specific applications are needed and have yet to be developed. Just as there are many kinds of HVAC systems to heat or cool various types of facilities of all shapes and sizes, there will be many containers for PCM of all configurations and sizes for various applications depending on the particular needs of that space.
Presently, containers for PCM exist for the purpose of containing the PCM within a conditioned space. To name a few, the PCM filled blanket as well as the PCM filled panel are two of the most notable. The PCM blanket exists as a sheet of fluid filled pouches that resemble bubble wrap or oversized ketchup packages. The PCM panel exists as a hollow plastic container that resembles an ice pack used in lunch boxes. Though both the PCM blanket as well as the PCM panel have uses in various applications, for some applications neither are the best choice. For example, either the PCM blanket or the PCM panel are great in applications involving drop ceiling. The blanket can be placed above the ceiling tiles or the panel can replace the tiles themselves. However, neither of these containers are the best option for cold storage. For an application like cold storage, the container for the PCM needs to be able to mount or suspend from the ceiling in front of the evaporators.
Therefore, the need exists for improved PCM container designs that are applicable to specific installations providing the maximum benefit in those particular scenarios.
The present invention is intended to provide an improved container mechanism and system for deploying PCM in conditioned spaces like, but not limited to, the refrigerated trailers of tractor-trailer rigs, walk-in refrigerators or freezers, or any sort of heated or cooled space. In order to maximize the temperature regulating effects of the PCM while also conserving usable space, the present invention is designed to fit securely on the roof or walls of the semi trailer, refrigerator, freezer or conditioned space minimizing the cancellation of usable space, yet positioned adjacent to the heating or cooling mechanism of the conditioned space. It is also contemplated that the present invention may be inserted into the walls of the conditioned space to further maximize on space as well as prevent damage to the containers holding PCM. Furthermore, by creating this proximity of the present invention to the conditioned air moving off the heating or cooling mechanism of the air conditioning system, the effects of the PCM within the present invention are thereby enhanced as the PCM is charged by conditioned air at its coldest or warmest temperature.
The present invention can provide one or more advantages compared to existing PCM containers. The present invention places the PCM within closest proximity to the heating and cooling mechanism of the conditioned space's air conditioning system, while also positioning the PCM on the roof or walls of the conditioned space where no precious storage or utility space is consumed. By situating the present in close proximity to the air conditioning mechanism, but also outside or on the fringe of usable space, the effects of the PCM are enhanced while not diminishing carrying or operating capacity of the trailer, fridge, freezer, or other conditioned space. For instance, an embodiment of the present invention made to mount on a semi trailer's roof or walls can maintain that refrigerated trailer at the desired temperature for longer periods of time without the use of active heating and cooling systems because of its proximity within the trailer to the conditioned air traveling through that trailer from the air conditioning system.
Additionally, the present invention is designed to offer bolt-on functionality thereby making installation as simple as attaching the rail assembly to the roof or walls of the conditioned space. Where the rail assembly and PCM container are part of a separable design, meaning the rail assembly and PCM container are not one cohesive part but two separate parts, the rail assembly simply adheres to the roof or walls of the conditioned space by bolts, screws, welds, or other attachment mechanisms and then the PCM container or containers slide into the rail assembly. Because conditioned spaces can vary in size, one embodiment of the present invention is designed to be comprised of components that attach to one another in a streamline fashion, thereby allowing the present invention to increase in length incrementally across the roof or walls of the conditioned space.
Furthermore, because of the present invention's enhanced surface area design, where the PCM containers within the rail assembly span the length and width of the trailer, the PCM within the present invention is able to interact with ambient air more effectively as the conditioned air flows across the present invention's surface. By designing the present invention in such a way that maximum surface area is obtained, the effects of the PCM are enhanced because more air interacts with more PCM.
Lastly, because of its interlinking design and ability to fasten to the roof of the trailer, the present invention is a more efficient alternative to other PCM containers like the panel or blanket, providing the same or more BTUs, while allowing quick installation, minimal consumption of usable space, and secure placement.
In most respects, an ATTS described herein comprises a single unit or series of rail assemblies that mount to the roof or walls of refrigerated spaces where the rail assemblies are secured in such a way to hold specially designed PCM filled containers, which may be permanently affixed to the rail assembly or removable from the rail assembly. The ATTS design allows for maximum surface area to volume ratio of the PCM filled containers leading to increased efficacy of the PCM.
The ATTS consists of a rail assembly that mounts to the roof of a refrigerated space by use of various attachment mechanisms such as, but not limited to, bolts, screws, glue, welds, or any other attachment mechanism able to hold the weight of the ATTS. The rail assembly consists of two rails of fixed length designed to exist at a fixed distance apart from one another for the purpose of holding PCM filled containers securely to the roof or walls of the conditioned space. The rails within the rail assembly can be made of any material able to hold the weight and shape of the PCM containers. The PCM containers, designed to fit securely into the rail assembly, may assume a variety of shapes such as, but not limited to, a flattened cuboidal shape with a “swiss cheese” like internal structure that creates a fixed structure for holding the PCM while encompassing a shape that maximizes the surface area to volume ratio of the container. It is also contemplated that the PCM container may take the shape of a honeycomb, or coil, or assume the arrangement of fans within a radiator. The ATTS may be comprised of a multi-component system where the PCM containers are separable from the rail assembly having the capability of being removed and reinserted into the rail assembly, or a single-component system where the PCM containers are permanently fixed to the rail assembly and the unit as a whole mounts to the roof or wall of the conditioned space as a complete product.
Implementations described herein can be understood more readily by reference to the following detailed descriptions, examples, and drawings. Elements, apparatus, and methods described herein, however, are not limited to the specific implementations presented in the detailed description, examples, and drawings. It should be recognized that these implementations are merely illustrative of the principles of the present disclosure. Numerous modifications and adaptations will be readily apparent to those of skill in the art without departing from the spirit and scope of this disclosure.
In one aspect an ATTS is described herein. Exemplary embodiments of such ATTS will now be more fully described with reference to the figures.
With reference to
With reference to
The ATTS 1 may manifest itself in at least two embodiments. In one embodiment, the ATTS 1 is one solid piece (solid assembly ATTS) where the PCM containers 4 are permanently fixed into the rail assembly 2, as depicted in
In another embodiment, the ATTS 1 may consist of a rail assembly 2 and PCM containers 4 as distinct, separable parts of the whole ATTS 1 where the PCM containers 4 may be removed from and inserted back into the rail assembly 2, as depicted in
63/203,827