Offset Window Mount Evaporative Cooler
An offset window mount fan unit includes two or more independently controlled fans controllable to move air in the same direction or in opposite directions. A housing substantially offsets the fans from a direct passage of air into the room. In one embodiment, the fans are mounted in a housing perpendicular to the window, air traveling through the fans turning 90 degrees to pass through the plane of the window and 90 degrees down into the room. Each fan includes a temperature sensor to measure temperature of air moving through each fan. The fans are energized periodically for a short time period to make accurate temperature measurements. When the combined temperature measurements indicate an advantage from fan operation, the fans are activated. An evaporative cooling section may be attached to an outside portion of the unit to provide additional cooling.
The present application is a Continuation In Part of U.S. patent application Ser. No. 16/036,266 filed Jul. 16, 2018, and a Continuation In Part of U.S. patent application Ser. No. 16/0417,122 filed May 20, 2019 which applications are incorporated in their entirety herein by reference.
BACKGROUND OF THE INVENTIONThe present invention relates to room temperature control and in particular to wall mounted fans.
Wall mounted fans are often used to provide cool outside air to a room when cooling is desired, or warm outside air to a room when heating is desired. The fans generally compare room temperature to a temperature setting, and activate the fan when the room temperature exceeds the setting for cooling and activate the fan when room temperature is less than the setting for heating. In many instances, the fan is operated when outside air is above the inside air temperature when cooling is desired or below the inside air temperature when heating is desired, providing an undesirable result.
Further, window fans are generally thin and have very little resistance to air passing through the fan when the fan is not on. On a windy day, either hot or cold outside air may enter the room creating an undesired result. The known fans also block a large portion of the window at least as large and the area of the fan.
U.S. patent application Ser. No. 16/036,266 filed Jul. 16, 2018, and U.S. patent application Ser. No. 16/0417,122 filed May 20, 2019 disclose an improved window fan to circulate outside air into a room, but do not provide cooling for the outside air. In some instances, merely circulating outside air does little to improve comfort inside a room.
BRIEF SUMMARY OF THE INVENTIONThe present invention addresses the above and other needs by providing an offset window mount fan unit including two or more independently controlled fans controllable to move air in the same direction or in opposite directions. A housing substantially offsets the fans from a direct passage of air into the room. In one embodiment, the fans are mounted in a housing perpendicular to the window, air traveling through the fans turning 90 degrees to pass through the plane of the window and 90 degrees down into the room. Each fan includes a temperature sensor to measure temperature of air moving through each fan. The fans are energized periodically for a short time period to make accurate temperature measurements. When the combined temperature measurements indicate an advantage from fan operation, the fans are activated. An evaporative cooling section may be attached to an outside portion of the unit to provide additional cooling.
In accordance with one aspect of the invention, there is provided an offset window fan housing having an outside portion containing at least one fan. The housing positions the partially, or totally offset from the window. In one embodiment, a housing has a narrow horizontal waist portion resting on a window sill, an exterior portion outside the window turning down, and an interior portion inside the room and turning down. At least one fan is in the exterior portion and has a fan axis (the direction air flows) perpendicular to the window. The thin waist portion minimizes the window area blocked by the fan and the downward interior and exterior portions prevent or reduce air flow due to wind.
In accordance with another aspect of the invention, there is provided a method for controlling a dual fan for heating a room. The method includes setting the dual fan to heating. Selecting a desired heating temperature setting. Briefly operating fans in opposing directions to create opposing air flow in and flow out. Measuring the temperature To in the flow in and Ti in the flow out. If the room temperature is below the heating temperature setting, and To is greater than Ti, operating the dual fan to bring in outside air.
In accordance with yet another aspect of the invention, there is provided a method for controlling a dual fan for cooling a room. The method includes setting the dual fan to cooling. Selecting a desired cooling temperature setting. Briefly operating fans in opposing directions to create opposing air flow in and flow out. Measuring the temperature To in the flow in and Ti in the flow out. If the room temperature is above the cooling temperature setting, and To is less than Ti, operating the dual fan to bring in outside air.
In accordance with another aspect of the invention, there is provided an offset window mount fan unit including an evaporative cooling attachment. The evaporative cooling attachment provides additional cooling with the advantages of the offset window mount fan unit. The evaporative cooling attachment may be combined with any or all of the functionality of the offset window mount fan unit, or may merely be attached to a basic offset window mount fan unit providing manually controlled cooling.
The above and other aspects, features and advantages of the present invention will be more apparent from the following more particular description thereof, presented in conjunction with the following drawings wherein:
Corresponding reference characters indicate corresponding components throughout the several views of the drawings.
DETAILED DESCRIPTION OF THE INVENTIONThe following description is of the best mode presently contemplated for carrying out the invention. This description is not to be taken in a limiting sense, but is made merely for the purpose of describing one or more preferred embodiments of the invention. The scope of the invention should be determined with reference to the claims.
Where the terms “about” or “generally” are associated with an element of the invention, it is intended to describe a feature's appearance to the human eye or human perception, and not a precise measurement.
A temperature controlled area 10 including a dual wall fan (for example a window fan) unit 14 according to the present invention are shown in
The fans 16a and 16b are operated periodically in opposite directions and an outdoor temperature sensor 28a measures outdoor temperature To in an air flow out of the room due to one of the fans 16a or 16b, and in indoor temperature sensor 28b measures an indoor temperature Ti in an air flow into the room due to the other one of the fans 16a or 16b. The sensors 28a and 28b may be inside the dual wall fan unit 14, on grills 29 of the dual wall fan unit 14, or extended on rods 27 reaching into and out of the room 13. The temperatures Tt, TI and Th, To, and Ti are all provided to a processor 50 (see
The processor 50 determines if the wall fan unit 14 should be energized or de-energized, based on the method of
A circuit according to the present invention for controlling the dual wall fan unit 14 is shown in
A perspective top, side, interior view of an offset window fan 60 is shown in
While the offset window fan 60 has been described as having the downward reaching interior and exterior portions 60a and 60c, in other embodiments the interior and exterior portions may simply be offset to some degree from the center portion to reduce overlap between the window 15 and the interior and exterior portions. For example, an air flow through the offset window fan 60 may be entirely horizontal.
A side view of the offset window fan 60 is shown in
A cross-section of an offset window fan 60 is shown in
A control panel and/or circuit 26 is shown on the housing 61a for control of the fan 63. The control panel 26 may include wireless communication with a Heating, Ventilation and Air Conditioning (HVAC) thermostat (for example a thermostat sold under the trademark Nest, Ecobee, or Honeywell) and with a local area network to remotely control the window fan 60, for example over the Internet using a smart phone. Examples of the wireless communication are WI-Fi®, a BLUETOOTH®, or other wireless communication. The operation of the window fan 60 and HVAC may be coordinated so they do not operate at the same time, or to coordinate their operation to maximum cooling, maximum heating, or more efficient operation. The window fan 60 may operate with the outdoor temperature sensor 28a eliminated by using Internet of Things (IoT) to obtain nearby weather station temperature.
A front view of an evaporative cooling attachment 70 is shown in
A front view of the evaporative cooling attachment 70 attached to the offset window fan 60 is shown in
The evaporative cooling attachment 70 may be attached to an offset window fan 60 including all of the features described in
The evaporative cooling attachment 70 may further include a third temperature sensor 28c in the cooled air flow 88. Cooled air temperature Tc may be compared to indoor temperature Ti, and if the cooled air temperature Tc is greater than the indoor temperature Ti, the fans 63 may be deactivated.
While the invention herein disclosed has been described by means of specific embodiments and applications thereof, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.
Claims
1. An offset window mount evaporative cooler comprising:
- an offset fan housing;
- an interior portion in fluid communication with a room interior;
- an exterior portion in fluid communication with a room exterior;
- a center portion configured to reside in a window opening and between the interior portion and the exterior portion and in fluid communication with both the interior portion and the exterior portion;
- at least one fan in either the interior portion or the exterior portion of the offset fan housing;
- an evaporative cooler housing extending down from the exterior portion of the offset fan housing and in fluid communication with the offset fan housing;
- vents allowing ambient to enter the evaporative cooler housing;
- pads in the path of the ambient air into the evaporative cooler housing;
- a water supply in fluid communication with the pads; and
- an air path through the vents, through the pads, and into the offset fan housing.
2. The offset window mount evaporative cooler of claim 1, wherein the center portion of the offset fan housing has a smaller cross-section than either the interior portion or the exterior portion, reducing an amount of window area blocked by the offset window fan.
3. The offset window mount evaporative cooler of claim 1, wherein:
- the exterior portion turns downward; and
- the fan resides in the exterior portion.
4. The offset window mount evaporative cooler of claim 1, wherein the water supply comprises a reservoir in the bottom of the evaporative cooler housing.
5. The offset window mount evaporative cooler of claim 4, wherein a water source fills the reservoir through a valve responsive to a water level in the reservoir.
6. The offset window mount evaporative cooler of claim 5, wherein the valve is closed by a float residing in the water in the reservoir.
7. The offset window mount evaporative cooler of claim 5, wherein an overflow releases water from the reservoir if the water level rises above the overflow.
8. The offset window mount evaporative cooler of claim 4, further including a pump in fluid communication with the water.
9. The offset window mount evaporative cooler of claim 8, wherein the pump is in fluid communication with the water through a strainer or a filter.
10. The offset window mount evaporative cooler of claim 8, wherein the pump advanced water through a water hose to a position above the pads and releases the water into the pads.
11. The offset window mount evaporative cooler of claim 1, wherein an insulated adapter connects the evaporative cooler housing to the offset fan housing.
12. The offset window mount evaporative cooler of claim 1, wherein the fan housing is a telescoping two piece housing having the interior portion and the exterior portion adjustable to sandwich a room exterior wall containing the offset window fan.
13. An offset window mount evaporative cooler comprising:
- an offset fan housing;
- an interior portion in fluid communication with a room interior;
- an exterior portion in fluid communication with a room exterior;
- a center portion configured to reside in a window opening and between the interior portion and the exterior portion and in fluid communication with both the interior portion and the exterior portion, the center portion having a smaller cross-section than either the interior portion or the exterior portion, the interior and exterior portion turning downward from the center portion;
- at least one fan in the exterior portion of the offset fan housing;
- an evaporative cooler housing extending down from the exterior portion of the offset fan housing and in fluid communication with the offset fan housing;
- vents allowing ambient to enter the evaporative cooler housing;
- pads in the path of the ambient air into the evaporative cooler housing;
- a reservoir in the bottom of the evaporative cooler housing;
- the reservoir configured to connect to a water source through a valve responsive to a water level in the reservoir;
- the reservoir in fluid communication with the pads through a pump in fluid communication with the reservoir through a strainer or filter; and
- an air path through the vents, through the pads, and into the offset fan housing.
Type: Application
Filed: Sep 10, 2019
Publication Date: Jan 16, 2020
Inventor: Antonio Aquino (Los Angeles, CA)
Application Number: 16/565,903