Electrical enclosures can be used to house a variety of electronic equipment in a variety of environments. In outdoor environments, electrical enclosures are used to house electrical equipment for agricultural applications, such as large drives for irrigation pumps and sprinkler systems. This electrical equipment is cumbersome, heavy, and often is housed in the enclosure in a remote environment, such as near the edge of the agricultural field that the equipment is serving. Furthermore, the electrical equipment may be damaged if it overheats due to a lack of proper cooling. Any ventilation provided in the electrical enclosure can lead to other potential problems for the electrical equipment such as damage from blowing snow or rain. Debris blowing in the wind and small animals can also present problems for the electrical equipment housed within the enclosure by entering the enclosure through any ventilation passages.
Thus, it would be beneficial to provide an enclosure that can be constructed to support the electrical equipment and be of a modular design to be assembled on location. It would also be beneficial to provide an enclosure that uses a selective ventilation system that protects the internal components of the enclosure from the outside elements, yet allows proper cooling of the interior of the enclosure when necessary.
Some embodiments of the invention provide a modular enclosure for electrical equipment including a first side, a second side, a third side, a fourth side, and an interior. The modular enclosure can include a base including at least one mounting receptacle for mounting a first fan and a frame coupled to the base. The modular enclosure can also include a first side panel, a second side panel, a third side panel, and a fourth side panel coupled to the frame. The enclosure can include a cover coupled to the frame that includes an overhang to prevent debris from entering the interior of the enclosure. The enclosure can also include a first gravity controlled damper. The first gravity controlled damper can move to an open position when an internal pressure in the interior of the enclosure increases and moving to a closed position when the internal pressure in the interior of the enclosure decreases. The enclosure can further include a passive air flow passage that can ventilate the interior of the enclosure when the first gravity controlled damper is in the closed position.
Another embodiment of the invention provides method of assembling a ventilated modular enclosure with electrical equipment generating heat. The method can include providing a modular enclosure that includes a base, a frame, side panels, a cover, and a back panel. The method can include installing the base in a desired location. The method can also include placing the back panel of the enclosure in a horizontal orientation with respect to the ground. Furthermore, the method can include installing the electrical equipment on the back panel while the back panel is in the horizontal orientation. Additionally, the method can include coupling the frame to the back panel and lifting the frame and the back panel to a vertical orientation. The method can further include coupling the side panels and cover to the frame and coupling the base to the frame.
Another aspect of the invention provides for a method of ventilating an enclosure. The method can include providing a gravity controlled damper system that includes a first damper. The first damper can prevent debris from entering the outdoor enclosure when the first damper is in a closed position. The first damper can ventilate the enclosure when the first damper is in an open position. The method can also include coupling the first damper to the enclosure and sensing a temperature in the interior of the enclosure. The method can include providing a passive air flow passage to the enclosure. The passive air flow passage can ventilate the enclosure when the first damper is in the closed position. The method can include activating a fan when the temperature in the interior of the enclosure is above a threshold temperature. The fan can increase an internal pressure in the enclosure and move the first damper to the open position.
These and other features, aspects, and advantages of the present invention will become better understood upon consideration of the following detailed description, drawings, and appended claims.
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings.
The following discussion is presented to enable a person skilled in the art to make and use embodiments of the invention. Various modifications to the illustrated embodiments will be readily apparent to those skilled in the art, and the generic principles herein can be applied to other embodiments and applications without departing from embodiments of the invention. Thus, embodiments of the invention are not intended to be limited to embodiments shown, but are to be accorded the widest scope consistent with the principles and features disclosed herein. The following detailed description is to be read with reference to the figures, in which like elements in different figures have like reference numerals. The figures, which are not necessarily to scale, depict selected embodiments and are not intended to limit the scope of embodiments of the invention. Skilled artisans will recognize the examples provided herein have many useful alternatives and fall within the scope of embodiments of the invention.
The modular enclosure 10 can also include side panels 30 that are coupled to the frame 22. The side panels 30 can be flush with the frame 22. Six side panels 30 are shown in
The enclosure 10 can also include a back panel 32 (two back panels are shown in
The modular enclosure 10 can also include a cover 36 that is coupled to the frame 22. The cover 36 can include an overhang 38 that extends around all four sides 12, 14, 16, 18 of the enclosure 10. A gap 40 can be located between the overhang 38 and a portion 42 of the cover 36 coupled to the frame 22. The cover 36 can prevent debris, such as sand, dust, precipitation, and other foreign objects, from entering the interior 34 of the enclosure 10. As shown in
As shown in
The gravity controlled dampers 52 can move between a closed position and an open position. A gravity controlled damper 52 in the closed position is shown in detail in
The gravity controlled dampers 52 can move from a closed position to an open position when the internal pressure in the interior 34 of the enclosure 34 increases. In one embodiment, the internal pressure in the interior 34 of the enclosure 34 can increase when the fan 26 is activated. Activation of the fan 26 can cause air flow through the interior 34 of the enclosure 10. Likewise, the gravity controlled damper 52 can move from an open position to a closed position when the internal pressure in the interior 34 of the enclosure 34 decreases. The internal pressure in the interior 34 of the enclosure 34 can decrease by deactivating the fan 26 in the enclosure 10.
The enclosure 10 can be ventilated even when the gravity controlled dampers 52 are in the closed position. The louvers 28 on the base 20 of the enclosure can include an internal mesh screen 68, as best shown in
The fans 26 mounted in the receptacles 24 in the base 20 of the enclosure 10 can be impeller fans, such as a 250 mm impeller fan produced by McLean Midwest. The fans 26 can be in electrical communication with a thermostat (not shown), thermocouple, or temperature sensor that can activate and/or deactivate the fans 26.
In the case that the fan is activated to increase the internal pressure in the interior 34 of the enclosure 10, the thermostat can again measure the temperature of the interior 34 of the enclosure 10 after a set period of time and compare the measured temperature to the threshold temperature. If the measured temperature is at or below the threshold temperature, then the fan can be deactivated. If the measured temperature is not at or below the threshold temperature, then the fan can continue to run to ventilate the enclosure 10.
In the case that the fan continues to run, the thermostat can again measure the temperature of the interior 34 of the enclosure 10 after a set period of time and compare the measured temperature to the threshold temperature. The fan 26 can continue to run and the thermostat can continue this logic until the temperature of the interior 34 of the enclosure 10 is at or below the threshold temperature, in which case, the fan 26 will be deactivated. This method 110 of ventilating the enclosure 10 can be run continuously in a loop.
The modular design of the enclosure 10 provides several advantages for the enclosure 10. The modular design of the base 20, frame 22, side panels 30, back panel 32, and cover 36 allow for easier transportation of the enclosure into a remote location, such as in an agricultural field. The modular design also allows the back panel 32 to be populated with the electronic equipment with the back panel 32 resting horizontally on the ground or a supporting structure, and then coupled to the frame 22 by lowering the frame on to the back panel 32. The plurality of receptacles 24 in the base 20 allow for different numbers of fans 26 for ventilating the enclosure 10. This allows a user to customize the enclosure 10 by determining the necessary cubic flow requirements for the enclosure 10 based on the heat generated by the electrical equipment that is mounted on the back panel 32 of the enclosure 10. The plurality of receptacles 24 also allows customization to increase the number of fans 26 in the enclosure 10 if the customer later adds more electronic equipment that requires a higher amount of air flow to provide proper cooling. When mounting receptacles 24 are not being used to house a fan 26, gland plates (not shown) can be used to cover the mounting receptacles 24.
The gravity controlled damper system 50 provides for selective ventilation and protects against blowing debris, such as snow, sand, and dust. Even when the gravity controlled dampers 52 move to an open position, the pressure differential between the interior 34 of the enclosure 10 and the outside environment prevents debris or precipitation from entering into the interior 34 of the enclosure 10. This is especially true with snow and dust that can swirl in the wind in any direction.
It will be appreciated by those skilled in the art that while the invention has been described above in connection with particular embodiments and examples, the invention is not necessarily so limited, and that numerous other embodiments, examples, uses, modifications and departures from the embodiments, examples and uses are intended to be encompassed by the claims attached hereto.