THERMAL DIFFUSION CHAMBER WITH COOLING TUBES
Preferably, a frame supporting a containment chamber, which in turn confines a sealed process chamber, is provided. Further, at least one fluid inlet box in fluidic communication with an exterior of the sealed process chamber is presented, in which the fluid inlet box includes at least a flow adjustment structure to control a fluid flow from a fluid source around the exterior of the sealed process chamber; and an open loop heat exchange system in fluidic communication with an interior of the sealed process chamber is present, within at least a portion of the open loop heat exchange system resides internal to the sealed process chamber.
Latest Poole Ventura, Inc. Patents:
This application is a continuation-in-part to U.S. patent application Ser. No. 12/982,224 filed Dec. 30, 2010 entitled, “Thermal Diffusion Chamber With Heat Exchanger.”
FIELD OF THE INVENTIONThe claimed invention relates to the field of thermal diffusion chamber equipment and methods of making thermal diffusion chambers for the production of solar energy panels, and more particularly to structures and methods of a obtaining a more even thermal profile of substrates confined within the thermal diffusion chamber.
BACKGROUNDA form of solar energy production relies on solar panels, which in turn rely on the diffusion of select materials onto a substrate. In one example, glass is used as the substrate, which is exposed to a gaseous selenide species to form a copper, indium and selenide containing film on the substrate. The gaseous selenide species is known to be toxic to humans, which underscores prudent handling methods, including thermal regulation systems.
As such, thermal regulation systems capable of precluding migration and leakage of the gaseous selenide species from within a process chamber to atmosphere, in an efficient and reliable manner, can greatly improve the operation and production output of thermal chambers used in providing substrates of copper, indium and selenide containing film diffused within them.
Accordingly, there is a continuing need for improved mechanisms and methods of thermal regulation of the process chamber for thermal diffusion chambers.
SUMMARY OF THE INVENTIONIn accordance with various exemplary embodiments, preferably, a frame supporting a containment chamber, which in turn confines a sealed process chamber, is provided. Further, at least one fluid inlet box in fluidic communication with an exterior of the sealed process chamber is presented, in which the fluid inlet box includes at least a flow adjustment structure to control a fluid flow from a fluid source around the exterior of the sealed process chamber; and an open loop heat exchange system in fluidic communication with an interior of the sealed process chamber is present, within at least a portion of the open loop heat exchange system resides internal to the sealed process chamber.
Reference will now be made in detail to one or more examples of various embodiments of the present invention depicted in the figures. Each example is provided by way of explanation of the various embodiments of the present invention, and not meant as a limitation of the invention. For example, features illustrated or described as part of one embodiment may be used with another embodiment to yield still a different embodiment. Other modifications and variations to the described embodiments are also contemplated within the scope and spirit of the claimed invention.
Turning to the drawings,
In a preferred exemplary embodiment, the heat source module is formed from a plurality of heaters 116 (also referred to herein as a heat source), which in an exemplary embodiment consists of substantially a total of twenty two (22) heaters. Preferably, each heater provides a heater shell 118, heater insulation 120 adjacent the heater shell 118, and a plurality of heating elements 122. In an exemplary embodiment, the heating elements 122 are powered by electricity, and are preferably a coiled element. However it is noted that the term “heat source” is not limited to the disclosed plurality of heaters 116. The heat source 116 may be natural gas, super heated steam, geo-thermal energy, or any other source of energy to produce a desired temperature within the process chamber 106.
Returning back to
Also shown by
By adjusting the fluid flow through the plurality of air inlet boxes 112, a more uniform cool down of the process chamber 106 may be attained. Further, in an alternate preferred mode of operation of the exemplary thermal diffusion chamber 100, the internal thermal sensor assembly 158, with additional input from the plurality of external thermal sensors 132, provides information for regulating an amount of power supplied to the heating elements 122 during a heat up cycle of the process chamber 106. That is, during a heat up cycle of the process chamber 106, power is being supplied to each of the plurality of heater 116. By modulating the power supplied to each of the plurality of heaters 116, a more uniform heat up of the process chamber 106 may be attained.
As shown by
In the exemplary embodiment of
In the alternate exemplary embodiment of
In the alternative exemplary embodiment of
As shown in a preferred embodiment by
In a preferred embodiment, the controller 202 includes at least an input/output module 204 communicating with the control signal buss 222, a processor 206 communicating with the input/output module 204, a memory 208 storing control logic 210 and communicating with the processor 206, an input device 212 communicating with the processor 206 and a display 214 communicating with the processor 206.
During a preferred operation of the thermal chamber 100, upon receipt by the input/output module 204 of a measured temperature value of a first fluid flowing around the exterior of the sealed process chamber 168, the input/output module 204 provides said measured temperature value of the first fluid flowing around the exterior of the sealed process chamber 168 to the processor 206. The processor 206 accesses the stored control logic 210 and determines a control signal based on the measured temperature value of the first fluid flowing around the exterior of the sealed process chamber 168. The processor 206 transmits the control signal to the input/output module 204, the input/output module 204 advances the control signal by way of the control signal buss 222 to the first fluid handling system 216.
Preferably, the processor 206 further determines an in use flow capacity percentage of fluid flowing through the first fluid handling system 216 based on data received from a flow usage monitoring device 224 communicating with a fluid transfer device 226 of the first fluid handling system 216. The processor 206 still further preferably provides the in use flow capacity percentage of the first fluid transfer device 226 and the measured temperature value of the first fluid flowing around the exterior of the sealed process chamber 168 to the display 214.
The schematic of
As shown by
Further shown by
Additionally, the first fluid handling system 216 preferably further includes a heat exchanger 238, external to and plumbed into the first fluid handling system 216 between the thermal diffusion chamber 100 and the fluid transfer device 226. The heat exchanger 238 may be selectively included in the fluid path of the first fluid through activation of a third control valve in response to a control signal provided by the control signal buss 222 from the processor 206 based on a temperature measurement value provided by a third thermal sensor measuring the first fluid exiting the thermal diffusion chamber 100. Preferably, the heat exchanger 238 is utilized to safeguard the fluid transfer device 226 from experiencing a thermal condition that exceeds its operating parameters.
To provide data regarding an in use thermal capacity of each of the plurality of heat sources 116 (of
In the preferred embodiment, shown by
Also preferably provided by the second fluid handling system 218 is a check valve disposed between the feed conduit 246 and the at least one fluid distribution conduit 244, the check valve mitigating a back flow from the interior of the sealed process chamber 168 to the second fluid transfer device 242. Additionally, an interior fluid control valve is preferably plumbed between the second fluid transfer device 242 and the at least one fluid distribution conduit 244, to control a flow of the second fluid into the interior of the sealed process chamber 168. The preferred embodiment also provides a fluid collection conduit 248 in fluid communication with the interior of the sealed process chamber 168 and the second fluid transfer device 242. The fluid collection conduit 248 returns the second fluid flowing into the interior of the sealed process chamber 168 to the second fluid transfer device 242.
Preferably, a fourth thermal sensor communicating with the returned second fluid and the control system 202 is provided by the second fluid handling system 218. The fourth thermal sensor preferably measures a temperature value of the returned second fluid and provides said measured temperature value to the control system 202. Upon receipt of the measured temperature value by the control system 202, the control system 202 compares the measured temperature value to a predetermined temperature value and sends an interior fluid control valve signal to the interior fluid control valve to modulate flow of the returned second fluid from the second fluid transfer device 242 in response to the interior fluid control valve signal.
Further shown by
Additionally, the second fluid handling system 218 preferably further includes a heat exchanger 250, external to and plumbed into the second fluid handling system 218 between the fluid collection conduit 248 and the second fluid transfer device 242. The heat exchanger 250 may be selectively included in the fluid path of the second fluid through activation of a fifth control valve in response to a control signal provided by the control signal buss 222 from the processor 206 based on a temperature measurement value provided by a sixth thermal sensor measuring the second fluid entering the fluid collection conduit 248.
Preferably, the heat exchanger 250 is utilized to safeguard the fluid transfer device 242 from experiencing a thermal condition that exceeds its operating parameters. Further, to provide data regarding an in use percentage of the fluid transfer device 242, a flow usage monitoring device 252 is preferably used to safeguard against exceeding the operating capabilities of the fluid transfer device 242.
In the preferred embodiment, shown by
Also preferably provided by the closed loop fluid handling system 220 is a check valve disposed between the feed conduit 258 and the at least one fluid distribution conduit 256, the check valve mitigating a back flow from the at least one fluid distribution conduit 256 to the closed loop fluid transfer device 254. Additionally, a sixth fluid control valve is preferably plumbed between the closed loop fluid transfer device 254 and the at least one fluid distribution conduit 256, to control a flow of the isolated third fluid into the at least one fluid distribution conduit 256. The preferred embodiment also provides a fluid collection conduit 260 in fluid communication with a return conduit 262 and the closed loop fluid transfer device 254. The fluid collection conduit 260 returns the isolated third fluid flowing into the at least one fluid distribution conduit 256.
Preferably, a seventh thermal sensor that communicates with the returned isolated third fluid and the control system 202 is provided by the second fluid handling system 220. The seventh thermal sensor preferably measures a temperature value of the returned isolated third fluid and provides said measured temperature value to the control system 202. Upon receipt of the measured temperature value by the control system 202, the control system 202 compares the measured temperature value to a predetermined temperature value and sends a fluid control valve signal to the fluid control valve, preferably plumbed in between the fluid collection conduit 260 and the return conduit 262. The fluid control valve preferably functions to modulate flow of the returned isolated third fluid from the return conduit 262 to the closed loop fluid transfer device 254 in response to the fluid control valve signal.
Further shown by
Additionally, the closed loop fluid handling system 220 preferably further includes a heat exchanger 268, internal to and plumbed within the closed loop fluid transfer device 254. The heat exchanger 268, may be selectively included in the fluid path of the isolated third fluid through activation of a sixth control valve in response to a control signal provided by the control signal buss 222 from the processor 206 based on a temperature measurement value provided by a ninth thermal sensor measuring the isolated third fluid exiting the external gas to gas heat exchanger 266.
Preferably, the heat exchanger 268 is utilized to safeguard a fluid advancement device 270 housed within the closed loop fluid transfer device 254, from experiencing a thermal condition that exceeds the operating parameters of the fluid advancement device 270. Further, to provide data regarding an in use percentage of the closed loop fluid transfer device 254, a flow usage monitoring device 272 is preferably used to safeguard against exceeding the operating capabilities of the fluid advancement device 270, while being operated by a drive system 274, connected to the fluid advancement device 270. In a preferred embodiment the isolated third fluid is held at a pressure below atmospheric pressure, while the fluid is at ambient temperature, to allow for thermal expansion of the isolated third fluid when the isolated third fluid is absorbing thermal energy from the interior of the sealed process chamber 168.
It is noted that each the first fluid, the second fluid, and the isolated third fluid may be any of a number of fluids including, but not limited to air, water, nitrogen, helium, propylene glycol, ethylene glycol, or any other heat transfer sympathetic fluid.
It is further noted that
A person skilled in the art will understand that alternate embodiments are inherently presented by
In the present alternate embodiment, the closed loop heat exchange system preferably includes at least a fluid transfer device, such as the closed loop fluid transfer device 254 in fluid communication with at least one closed loop heat exchanger, such as the closed loop heat exchanger 174 of
A second alternate embodiment includes at least a fluid handling system such as 216 in fluidic communication with the exterior of the sealed process chamber 168, combined with an open loop heat exchange system in fluidic communication with the interior of the sealed process chamber 168. The second alternate embodiment preferably further includes the control system 202, which communicates with each the fluid handling system 216 and the open loop heat exchange system, and sets a flow rate of each the fluid flowing around an exterior of the sealed process chamber 168, fluid flowing through the open loop heat exchange system and into the sealed process chamber 168 processing cavity in response to the measured internal temperature of the sealed process chamber.
In the present second alternate embodiment, the open loop heat exchange system preferably includes at least a fluid transfer device, such as the fluid transfer device 242 in fluid communication with at least one open loop heat exchanger, such as the open loop heat exchanger 178 of
A third alternate embodiment includes at least a fluid handling system such as 216 in fluidic communication with the exterior of the sealed process chamber 168, combined with a closed loop heat exchange system, and an open loop heat exchange system, in which both the open loop and closed loop heat exchange systems are in fluidic communication with the interior of the sealed process chamber 168.
The third alternate embodiment preferably further includes the control system 202, which communicates with each the fluid handling system 216, the closed loop heat exchange system, and the open loop heat exchange system, and sets a flow rate of each the fluid flowing around an exterior of the sealed process chamber 168, and the fluid flowing through each the open loop and closed loop heat exchange systems, and into the sealed process chamber 168 processing cavity in response to the measured internal temperature of the sealed process chamber.
In the present third alternate embodiment, the open loop heat exchange system preferably includes at least a fluid transfer device, such as the fluid transfer device 242 in fluid communication with at least one open loop heat exchanger, such as the open loop heat exchanger 178 of
Turning to
A process step 312, a fluid inlet box (such as 112) is preferably secured to the containment chamber in fluidic communication with the thermal regulation cavity. Preferably, the fluid inlet box provides a plate valve (such as 134) that mitigates the flow of gasses from the thermal regulation cavity through the fluid inlet box and to the atmosphere, and wherein the fluid inlet box further includes a flow adjustment structure (such as 136) interacting with the plate valve to control fluid flow from the atmosphere past the plate valve and into thermal regulation cavity.
At process step 314, a thermal sensor assembly (such as 158) is disposed within the sealed process chamber. At process step 316, a controller (such as 204) is connected to each a flow adjustment structure (such as 136) and the thermal assembly, and the process concludes at end process step 318.
A process step 412, a first fluid handling system (such as 216) is preferably secured to in fluidic communication with an exterior of the sealed process chamber. Preferably, the first fluid handling system provides a fluid inlet box (such as 112), which in turn provides a plate valve (such as 134). The plate valve mitigates the flow of fluid from the thermal regulation cavity through the fluid inlet box and external the containment chamber, and wherein the fluid inlet box further includes a flow adjustment structure (such as 136) interacting with the plate valve to control fluid flow from external the containment chamber, past the plate valve and into thermal regulation cavity.
A process step 414, a second fluid handling system (such as 218, or 220) is preferably positioned in fluidic communication with an interior of the sealed process chamber. Preferably, the second fluid handling system provides means for transferring fluid into and out of the interior of the sealed process chamber during a thermal diffusion process cycle. At process step 416, a controller (such as 204) is connected to each the first and second fluid handling systems, and the process concludes at end process step 418.
At process step 512, a fluid handling system (such as 216) is preferably secured to in fluidic communication with an exterior of the sealed process chamber. Preferably, the first fluid handling system provides a fluid inlet box (such as 112), which in turn provides a plate valve (such as 134). The plate valve mitigates the flow of fluid from the thermal regulation cavity through the fluid inlet box and external the containment chamber, and wherein the fluid inlet box further includes a flow adjustment structure (such as 136) interacting with the plate valve to control fluid flow from external the containment chamber, past the plate valve and into thermal regulation cavity.
At process step 514, a closed loop heat exchange system (such as 296 of
At process step 612, a fluid handling system (such as 216) is preferably secured to in fluidic communication with an exterior of the sealed process chamber. Preferably, the first fluid handling system provides a fluid inlet box (such as 112), which in turn provides a plate valve (such as 134). The plate valve mitigates the flow of fluid from the thermal regulation cavity through the fluid inlet box and external the containment chamber, and wherein the fluid inlet box further includes a flow adjustment structure (such as 136) interacting with the plate valve to control fluid flow from external the containment chamber, past the plate valve and into thermal regulation cavity.
At process step 614, an open loop heat exchange system (such as 298 of
At process step 712, a fluid handling system (such as 216) is preferably secured to in fluidic communication with an exterior of the sealed process chamber. Preferably, the first fluid handling system provides a fluid inlet box (such as 112), which in turn provides a plate valve (such as 134). The plate valve mitigates the flow of fluid from the thermal regulation cavity through the fluid inlet box and external the containment chamber, and wherein the fluid inlet box further includes a flow adjustment structure (such as 136) interacting with the plate valve to control fluid flow from external the containment chamber, past the plate valve and into thermal regulation cavity.
At process step 714, an open loop heat exchange system (such as 298 of
At process step 716, a closed loop heat exchange system (such as 296 of
At process step 718, a controller (such as 204) is connected to each the fluid handling system and the open loop heat exchange system, and the process concludes at end process step 720.
Returning to
Returning again to
It is to be understood that even though numerous characteristics and advantages of various embodiments of the present invention have been set forth in the foregoing description, together with details of the structure and function of various embodiments of the invention, this detailed description is illustrative only, and changes may be made in detail, especially in matters of structure and arrangements of parts within the principles of the present claimed invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. For example, the particular elements may vary depending on the particular application without departing from the spirit and scope of the present claimed invention.
It will be clear that the present invention is well adapted to attain the ends and advantages mentioned as well as those inherent therein. While presently preferred embodiments have been described for purposes of this disclosure, numerous changes may be made which will readily suggest themselves to those skilled in the art and which are encompassed by the appended claims.
Claims
1. An apparatus comprising:
- a frame supporting a containment chamber;
- a sealed process chamber confined within the containment chamber;
- at least one fluid inlet box in fluidic communication with an exterior of the sealed process chamber, the fluid inlet box including at least a flow adjustment structure to control a fluid flow from a fluid source around the exterior of the sealed process chamber; and
- an open loop heat exchange system in fluidic communication with an interior of the sealed process chamber, wherein the open loop heat exchange system includes cooling tubes that extend into the sealed process chamber.
2. The apparatus of claim 1, further comprising:
- a heat source module disposed between the containment chamber and the process chamber; and
- a thermal sensor assembly disposed within an interior of the sealed process chamber contactingly adjacent a wall of the sealed thermal chamber, the thermal sensor assembly measures an internal temperature value of the sealed process chamber, and wherein the cooling tubes extend into the sealed process chamber a distance less than to a mid-point along the length of the sealed process chamber.
3. The apparatus of claim 1, further comprising a controller communicating with the flow adjustment structure and the thermal sensor assembly, the controller sets a flow position of the flow adjustment structure to regulate fluid flow from the fluid source, through the fluid inlet box, and around the exterior of the sealed process chamber in response to the measured internal temperature value of the sealed process chamber, and wherein the cooling tubes extend into the sealed process chamber a distance to a mid-point portion of the sealed process chamber, along the length of the sealed process chamber.
4. The apparatus of claim 1, in which the open loop heat exchange system comprising:
- an inlet manifold communicating with a collar secured to said sealed process chamber, wherein said collar is adjacent an open end of said sealed process chamber; and
- an outlet manifold communicating with said collar and offset from said inlet manifold, and wherein the cooling tubes extend into the sealed process chamber a distance beyond a mid-point portion of the sealed process chamber, along the length of the sealed process chamber.
5. The apparatus of claim 1, in which the cooling tubes of the open loop heat exchange system comprising:
- an inlet cooling tube adjacent an interior surface of said sealed process chamber; and
- an outlet cooling tube adjacent said interior surface of said sealed process chamber and offset from said inlet cooling tube, and wherein each the inlet cooling tube and the outlet cooling tube extend a distance adjacent a mid-point portion of the sealed process chamber, along the length of the sealed process chamber.
6. The apparatus of claim 1, in which the open loop heat exchange system comprising:
- an inlet header adjacent an exterior surface of a collar secured to said sealed process chamber, wherein said collar is further adjacent an end of said containment chamber; and
- an outlet header adjacent said end of said containment chamber and offset from said inlet header.
7. The apparatus of claim 1, in which the open loop heat exchange system comprising:
- an inlet accumulator adjacent an exterior surface of said containment chamber; and
- an outlet accumulator adjacent said exterior surface of said containment chamber and offset from said inlet accumulator.
8. The apparatus of claim 1, in which the open loop heat exchange system comprising:
- a fluid supply conduit adjacent an exterior surface of said containment chamber; and
- a fluid return conduit adjacent said exterior surface of said containment chamber and offset from said fluid supply conduit.
9. The apparatus of claim 1, in which the open loop heat exchange system comprising, a heat exchanger adjacent an exterior surface of said containment chamber, and in which said heat exchanger comprises:
- a heat exchange core;
- a coolant input port communicating with said heat exchange core;
- a coolant output port communicating with said heat exchange core and offset from said coolant input port;
- a fluid input port in fluid communication with said heat exchange core; and
- a fluid output port in fluid communication with said heat exchange core and offset from said fluid input port.
10. The apparatus of claim 1, in which the open loop heat exchange system comprising, a fluid handling unit for exchanging fluid contained internal to said sealed process chamber.
11. An apparatus comprising:
- a frame supporting a containment chamber;
- a sealed process chamber confined within the containment chamber;
- at least one fluid inlet box in fluidic communication with an exterior of the sealed process chamber, the fluid inlet box including at least a flow adjustment structure to control a fluid flow from a fluid source around the exterior of the sealed process chamber;
- an open loop heat exchange system in fluidic communication with an interior of the sealed process chamber;
- a controller communicating with the flow adjustment structure; and
- a control signal buss communicating with at least the flow adjustment structure, and the controller, the control signal buss sends a control signal to the flow adjustment structure in response to measured internal temperature value of an interior of said sealed process chamber, wherein the open loop heat exchange system includes cooling tubes that extend into the sealed process chamber.
12. The apparatus of claim 11, in which the open loop heat exchange system comprising:
- an inlet manifold communicating with a collar secured to said sealed process chamber, wherein said collar is adjacent an open end of said sealed process chamber; and
- an outlet manifold communicating with said collar and offset from said inlet manifold.
13. The apparatus of claim 12, in which the open loop heat exchange system further comprising:
- an inlet cooling tube adjacent an interior surface of said sealed process chamber; and
- an outlet cooling tube adjacent said interior surface of said sealed process chamber and offset from said inlet cooling tube.
14. The apparatus of claim 13, in which the open loop heat exchange system further comprising:
- an inlet header adjacent an exterior surface of a collar secured to said sealed process chamber, wherein said collar is further adjacent an end of said containment chamber; and
- an outlet header adjacent said end of said containment chamber and offset from said inlet header.
15. The apparatus of claim 14, in which the open loop heat exchange system further comprising:
- an inlet accumulator adjacent an exterior surface of said containment chamber; and
- an outlet accumulator adjacent said exterior surface of said containment chamber and offset from said inlet accumulator.
16. The apparatus of claim 15, in which the open loop heat exchange system further comprising:
- a fluid supply conduit adjacent an exterior surface of said containment chamber; and
- a fluid return conduit adjacent said exterior surface of said containment chamber and offset from said fluid supply conduit.
17. The apparatus of claim 16, in which the open loop heat exchange system further comprising, a heat exchanger adjacent an exterior surface of said containment chamber, and in which said heat exchanger comprises:
- a heat exchange core;
- a coolant input port communicating with said heat exchange core;
- a coolant output port communicating with said heat exchange core and offset from said coolant input port;
- a fluid input port with said heat exchange core; and
- a fluid output port communicating with said heat exchange core and offset from said fluid input port.
18. The apparatus of claim 17, in which the open loop heat exchange system further comprising, a fluid handling unit for exchanging a fluid contained internal to said sealed process chamber.
19. The apparatus of claim 18, in which the open loop heat exchange system further comprising;
- a first isolation valve disposed between said fluid supply conduit and said fluid handling unit; and
- a second isolation valve disposed between said fluid return conduit and said fluid handling unit.
20. The apparatus of claim 18, in which the open loop heat exchange system further comprising;
- a first set of thermal dispersion baffles secured to said inlet manifold; and
- a second set of thermal dispersion baffles secured to said outlet manifold, wherein said first and said second thermal dispersion baffles mitigate transfer of heat from internal said sealed process chamber to a door sealing said sealed process chamber.
Type: Application
Filed: Feb 18, 2013
Publication Date: Jun 20, 2013
Applicant: Poole Ventura, Inc. (Oxnard, CA)
Inventor: Poole Ventura, Inc. (Oxnard, CA)
Application Number: 13/769,433
International Classification: F28F 27/00 (20060101); F28F 1/00 (20060101);