CA2442046C - Bathroom ventilation fan - Google Patents
Bathroom ventilation fan Download PDFInfo
- Publication number
- CA2442046C CA2442046C CA002442046A CA2442046A CA2442046C CA 2442046 C CA2442046 C CA 2442046C CA 002442046 A CA002442046 A CA 002442046A CA 2442046 A CA2442046 A CA 2442046A CA 2442046 C CA2442046 C CA 2442046C
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- Prior art keywords
- fan
- housing
- ventilation fan
- bathroom ventilation
- motor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F2007/001—Ventilation with exhausting air ducts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ventilation (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A bathroom ventilation fan having a substantially cylindrical housing having a top and side surfaces, an exhaust outlet and an air inlet. A motor is housed within the housing and a fan having a plurality of fan blades is connected to the motor. Space between the fan and the top surface increases in the direction of rotation of the fan.
Description
TITLE OF THE INVENTION
BATHROOM VENTILATION FAN
FIELD OF THE INVENTION
The present invention relates to the field of bathroom ventilation fans for use in removing air from a bathroom area and venting it to an exterior location.
BACKGROUND OF THE INVENTION
Condensation is an unwelcome visitor in any home. Condensation resulting from super-saturated air from hot water sources in a bathroom, such as the hot water of a shower or bath, can cause problems with mold and mildew and can potentially cause other damage. A bathroom ventilation fan is useful in venting the super-saturated air from the bathroom in order to limit the amount of condensation formed. A
bathroom ventilation fan is also useful in removing stale air and odors that may be present in the bathroom.
The volume of a room determines the size or number of bathroom ventilation fans that are needed for adequate ventilation. Most bathroom ventilation fans are rated between 50 CFM (cubic feet per minute) to 250 CFM. Typically, the ventilation fans produce more noise the more powerful they are. The loudness of most fans ranges between .3 Sones and 2.5 Sones.
The ventilation fan is mounted in the bathroom ceiling between the joists, and is therefore limited in size by the space between the joists and between the ceiling and the floor above it. An air inlet in the bottom of the ventilation fan is positioned above an opening in the ceiling of the bathroom. An exhaust duct is connected to an exhaust outlet located on a side of the ventilation fan. The duct directs air drawn into the air inlet of the ventilation fan from the bathroom to a desired location, typically outside.
The bathroom fans of the prior art typically have a square casing having a top, bottom and sides, with a maximum width corresponding to the distance between the joists.
The bottom is open, allowing the interior components to be fitted within the casing. A
blower housing is fitted within the casing interior and a centrifugal fan, sometimes io referred to as a blower wheel, is fitted within the blower housing. A motor is secured within the casing, either above or below the blower housing and wheel, and connects to the centrifugal fan, such that when it is activated, the motor acts to rotate the centrifugal fan. A venturi plate having an air inlet is then connected to the casing.
When rotated by the motor, the blower wheel draws air in through the air inlet (aligned with the fan) and forces it radially outwards and in the direction of rotation of the wheel. Air being forced through the housing follows the rounded contour of the side wall of the blower housing until it exits through the exhaust outlet (located in the side wall).
2o This type of ventilation fan is of a vertical design in that the shaft of the motor has a vertical axis and acts to rotate the blower wheel in the horizontal.
In order to maximize the air flow, the side wall of the blower housing is preferably rounded, with the space between the fan and the side wall increasing in the direction of rotation of the centrifugal fan such that it is greatest in the area of the exhaust outlet. However, because there must be space between the fan and the side wall, the size of the centrifugal fan air inlet opening that may be used is limited such that typically its diameter is one half the width of the casing. This limitation on the size of the opening in tum limits the volume of air that may be exhausted by way of the ventilation fan. In order to increase the volume of air being exhausted, one must increase the size of the motor powering the blower wheel, rotating the blower wheel at a higher rpm with a resulting increase in the noise generated.
It is therefore an object of an embodiment of the present invention to provide a bathroom ventilation fan wherein the size of the air inlet and fan is maximized in relation to the casing and housing.
It is a further object of an embodiment of the present invention to provide a bathroom ventilation fan having only a housing (no casing), thereby lowering the cost.
It is a further object of an embodiment of the present invention to provide a horizontal design for a bathroom ventilation fan.
Other objects of the invention will be apparent from the description that follows.
SUMMARY OF THE INVENTION
According to the present invention there is provided a bathroom ventilation fan comprising a substantially cylindrical housing having a top, a bottom and a cylindrical side surface, an air inlet opening and an exhaust outlet. A motor is housed within the housing and at least one fan is connected thereto. The fan has a plurality of fan blades and is rotatable by the motor, the fan rotating perpendicular to the longitudinal axis of the cylindrical housing. There is a space between the fan blades and the top surface of the housing, the space increasing in the direction of rotation of the fan from one side of the exhaust outlet to the opposite side of the exhaust outlet.
In another aspect, the fan further comprises an inner collar and an outer cylindrical stabilizing element, wherein the fan blades project radially from the inner collar to the outer cylindrical stabilizing element.
BATHROOM VENTILATION FAN
FIELD OF THE INVENTION
The present invention relates to the field of bathroom ventilation fans for use in removing air from a bathroom area and venting it to an exterior location.
BACKGROUND OF THE INVENTION
Condensation is an unwelcome visitor in any home. Condensation resulting from super-saturated air from hot water sources in a bathroom, such as the hot water of a shower or bath, can cause problems with mold and mildew and can potentially cause other damage. A bathroom ventilation fan is useful in venting the super-saturated air from the bathroom in order to limit the amount of condensation formed. A
bathroom ventilation fan is also useful in removing stale air and odors that may be present in the bathroom.
The volume of a room determines the size or number of bathroom ventilation fans that are needed for adequate ventilation. Most bathroom ventilation fans are rated between 50 CFM (cubic feet per minute) to 250 CFM. Typically, the ventilation fans produce more noise the more powerful they are. The loudness of most fans ranges between .3 Sones and 2.5 Sones.
The ventilation fan is mounted in the bathroom ceiling between the joists, and is therefore limited in size by the space between the joists and between the ceiling and the floor above it. An air inlet in the bottom of the ventilation fan is positioned above an opening in the ceiling of the bathroom. An exhaust duct is connected to an exhaust outlet located on a side of the ventilation fan. The duct directs air drawn into the air inlet of the ventilation fan from the bathroom to a desired location, typically outside.
The bathroom fans of the prior art typically have a square casing having a top, bottom and sides, with a maximum width corresponding to the distance between the joists.
The bottom is open, allowing the interior components to be fitted within the casing. A
blower housing is fitted within the casing interior and a centrifugal fan, sometimes io referred to as a blower wheel, is fitted within the blower housing. A motor is secured within the casing, either above or below the blower housing and wheel, and connects to the centrifugal fan, such that when it is activated, the motor acts to rotate the centrifugal fan. A venturi plate having an air inlet is then connected to the casing.
When rotated by the motor, the blower wheel draws air in through the air inlet (aligned with the fan) and forces it radially outwards and in the direction of rotation of the wheel. Air being forced through the housing follows the rounded contour of the side wall of the blower housing until it exits through the exhaust outlet (located in the side wall).
2o This type of ventilation fan is of a vertical design in that the shaft of the motor has a vertical axis and acts to rotate the blower wheel in the horizontal.
In order to maximize the air flow, the side wall of the blower housing is preferably rounded, with the space between the fan and the side wall increasing in the direction of rotation of the centrifugal fan such that it is greatest in the area of the exhaust outlet. However, because there must be space between the fan and the side wall, the size of the centrifugal fan air inlet opening that may be used is limited such that typically its diameter is one half the width of the casing. This limitation on the size of the opening in tum limits the volume of air that may be exhausted by way of the ventilation fan. In order to increase the volume of air being exhausted, one must increase the size of the motor powering the blower wheel, rotating the blower wheel at a higher rpm with a resulting increase in the noise generated.
It is therefore an object of an embodiment of the present invention to provide a bathroom ventilation fan wherein the size of the air inlet and fan is maximized in relation to the casing and housing.
It is a further object of an embodiment of the present invention to provide a bathroom ventilation fan having only a housing (no casing), thereby lowering the cost.
It is a further object of an embodiment of the present invention to provide a horizontal design for a bathroom ventilation fan.
Other objects of the invention will be apparent from the description that follows.
SUMMARY OF THE INVENTION
According to the present invention there is provided a bathroom ventilation fan comprising a substantially cylindrical housing having a top, a bottom and a cylindrical side surface, an air inlet opening and an exhaust outlet. A motor is housed within the housing and at least one fan is connected thereto. The fan has a plurality of fan blades and is rotatable by the motor, the fan rotating perpendicular to the longitudinal axis of the cylindrical housing. There is a space between the fan blades and the top surface of the housing, the space increasing in the direction of rotation of the fan from one side of the exhaust outlet to the opposite side of the exhaust outlet.
In another aspect, the fan further comprises an inner collar and an outer cylindrical stabilizing element, wherein the fan blades project radially from the inner collar to the outer cylindrical stabilizing element.
In another aspect, the side surface extends downward from, and perpendicularly to, the top surface, terminating at a bottom end thereby forming the air inlet opening, which is circular.
In another aspect, the side surface and the stabilizing element are substantially concentric.
In another aspect, the cylindrical housing of the bathroom ventilation fan described io above further comprises a columnar channel within which the motor is connected to the housing. The top surface of the housing spirals about the columnar channel.
In yet another aspect, the side surface extends downward from, and perpendicularly to, the top surface, terminating at a bottom plate having the air inlet opening defined therein, the inlet opening being circular. The bottom plate has a pair of opposed side walls having mounting channels for use in mounting the ventilation fan to ceiling joists.
Other aspects of the invention will be appreciated by reference to the detailed 2o description of the preferred embodiment and to the claims that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings and wherein:
Fig. 1 is a perspective view of a preferred embodiment of a bathroom ventilation fan;
In another aspect, the side surface and the stabilizing element are substantially concentric.
In another aspect, the cylindrical housing of the bathroom ventilation fan described io above further comprises a columnar channel within which the motor is connected to the housing. The top surface of the housing spirals about the columnar channel.
In yet another aspect, the side surface extends downward from, and perpendicularly to, the top surface, terminating at a bottom plate having the air inlet opening defined therein, the inlet opening being circular. The bottom plate has a pair of opposed side walls having mounting channels for use in mounting the ventilation fan to ceiling joists.
Other aspects of the invention will be appreciated by reference to the detailed 2o description of the preferred embodiment and to the claims that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings and wherein:
Fig. 1 is a perspective view of a preferred embodiment of a bathroom ventilation fan;
Fig. 2 is a cross sectional view of the bathroom ventilation fan of Fig. 1;
Fig. 3 is a cross sectional view of an alternative embodiment of the bathroom ventilation fan of Fig. 1 Fig. 4 is an exploded perspective view of an alternative embodiment of a bathroom ventilation fan;
Fig. 5 is a cross sectional view of a further alternative embodiment of a bathroom ventilation fan;
Fig. 6 is a perspective view of the bathroom fan of Fig. 5;
Fig. 7 is a cross sectional view of yet a further alternative embodiment of a bathroom ventilation fan;
Fig. 8 is a perspective view of the bathroom fan of Fig.7; and Fig. 9 is a cross sectional view of yet a further alternative embodiment of a bathroom ventilation fan.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment of a bathroom ventilation fan 10 is shown in Figs. 1-3. As shown in Fig. 1, the bathroom fan 10 has a substantially cylindrical housing 12 having a top surface 2, a bottom and a substantially cylindrical side surface 4. A
circular air inlet opening 18 (shown in Fig. 2) is defined in the bottom of the housing by the curved side surface 4 and an exhaust outlet 14 is defined in the side surface 4.
Fig. 3 is a cross sectional view of an alternative embodiment of the bathroom ventilation fan of Fig. 1 Fig. 4 is an exploded perspective view of an alternative embodiment of a bathroom ventilation fan;
Fig. 5 is a cross sectional view of a further alternative embodiment of a bathroom ventilation fan;
Fig. 6 is a perspective view of the bathroom fan of Fig. 5;
Fig. 7 is a cross sectional view of yet a further alternative embodiment of a bathroom ventilation fan;
Fig. 8 is a perspective view of the bathroom fan of Fig.7; and Fig. 9 is a cross sectional view of yet a further alternative embodiment of a bathroom ventilation fan.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment of a bathroom ventilation fan 10 is shown in Figs. 1-3. As shown in Fig. 1, the bathroom fan 10 has a substantially cylindrical housing 12 having a top surface 2, a bottom and a substantially cylindrical side surface 4. A
circular air inlet opening 18 (shown in Fig. 2) is defined in the bottom of the housing by the curved side surface 4 and an exhaust outlet 14 is defined in the side surface 4.
Preferably the housing 12 is formed of injection molded plastic and has a central, hollow columnar portion 20 forming a cylindrical chamber in the housing interior within which a motor 22 having a driving shaft 23 is mounted, the motor being longitudinally disposed therein, as shown in Fig. 2. At least one propeller-type fan 24 is connected to the shaft 23 of the motor 22. Propeller fans operate with air flow parallel to the axis of rotation of the fan. Preferably there are at least two propeller fans 24 connected to shaft 23. Each fan 24 has an inner collar 30 that is adapted to fit around and connect to the shaft 23. Fan blades 26 project radially from the collar, the fan having a io diameter that is less than the diameter of the side surface 4. In order to provide additional structural rigidity, the radially outer edges of the fan blades can be connected to a cylindrical stabilizing element 28 that prevents the fan blades from bending or distorting during operation.
1s When the motor 22 is activated, fan 24 is rotated perpendicular to the longitudinal axis of the cylindrical housing 12 thereby acting to draw air through the air inlet opening 18 into the housing where it is then forced out the exhaust outlet 14 to be vented to an exterior location, for example by way of an exhaust duct (not shown) attached to exhaust outlet 14 (by way of an adapter, if necessary) and leading to the 2o exterior location. The presence of a second or third fan 24 compliments the first fan.
The second fan accelerates air drawn into the housing by the first fan. Air accelerated by the second fan is in turn further accelerated by the third fan.
It is contemplated that other propeller style fans could be used and that the number of fan blades and the fan blade pitch may be varied in order to provide different air flow 25 capabilities and noise levels for the bathroom fans.
The propeller fan is designed to force air towards the top surface 2 of the housing and in the direction of rotation of the fan, indicated by an arrow in Fig. 1. The space between the fan blades 26 and the top surface 2 increases in the direction of rotation 30 of the fan to a maximum at the exhaust outlet 14. Looking at Fig. 1, the top surface 2 can be seen to slope around the columnar portion 20. Preferably the spiraling top surface 2 is substantially perpendicular to the side surface 4 along any radial axis of the housing as shown in Fig. 2. Preferably, the columnar portion 20 and motor 22 are also substantially cylindrical and are concentric to side surface 4. This spiraling of the top surface 2 in the direction of rotation of the fan improves the airflow within the housing, making the housing more efficient. Air forced upwards by the propeller fan(s) is directed by top surface 2 to the exhaust outlet 14. Preferably, the housing 12 is equipped with a deflector plate 17 angled downward from the exhaust outlet 14 into the interior of the housing which acts to direct air to the exhaust outlet.
A base 6 connects to the housing body 12. In addition to providing additional structural rigidity, base 6 forms part of the mounting platform for the ventilation fan 10.
As shown in Fig. 2, base 6 is a square plate having a circular opening defined by wall 5 that is sized to fit snugly into opening 18 in housing 12. A pair of vertical walls 15 extend perpendicularly to base 6 from opposite sides. Each vertical wall 15 is equipped with a mounting channel 16 for mounting the ventilation fan to the ceiling joists. Metal shafts (not shown) may be fitted into the mounting channels and the end of the shafts connected to the joists in order to securely mount the fan in the ceiling.
2o By minimizing the space between the radially outer edge of the fan 24 and the rounded side surface 4, the diameter of the fan 24 is maximized relative to the housing. In addition, by using a propeller style fan, the size of the air inlet may also be increased relative to the housing as compared to the ventilation fans of the prior art using blower wheels and blower housings. Because use of the space within the housing is maximized, the size of the motor may also be increased. The motor housing and fan assembly therefore results in a more powerful vertical design bathroom fan as compared to the vertical designs of the prior art. In addition, costs may be reduced as fewer materials are required, specifically, no outer casing is necessary.
1s When the motor 22 is activated, fan 24 is rotated perpendicular to the longitudinal axis of the cylindrical housing 12 thereby acting to draw air through the air inlet opening 18 into the housing where it is then forced out the exhaust outlet 14 to be vented to an exterior location, for example by way of an exhaust duct (not shown) attached to exhaust outlet 14 (by way of an adapter, if necessary) and leading to the 2o exterior location. The presence of a second or third fan 24 compliments the first fan.
The second fan accelerates air drawn into the housing by the first fan. Air accelerated by the second fan is in turn further accelerated by the third fan.
It is contemplated that other propeller style fans could be used and that the number of fan blades and the fan blade pitch may be varied in order to provide different air flow 25 capabilities and noise levels for the bathroom fans.
The propeller fan is designed to force air towards the top surface 2 of the housing and in the direction of rotation of the fan, indicated by an arrow in Fig. 1. The space between the fan blades 26 and the top surface 2 increases in the direction of rotation 30 of the fan to a maximum at the exhaust outlet 14. Looking at Fig. 1, the top surface 2 can be seen to slope around the columnar portion 20. Preferably the spiraling top surface 2 is substantially perpendicular to the side surface 4 along any radial axis of the housing as shown in Fig. 2. Preferably, the columnar portion 20 and motor 22 are also substantially cylindrical and are concentric to side surface 4. This spiraling of the top surface 2 in the direction of rotation of the fan improves the airflow within the housing, making the housing more efficient. Air forced upwards by the propeller fan(s) is directed by top surface 2 to the exhaust outlet 14. Preferably, the housing 12 is equipped with a deflector plate 17 angled downward from the exhaust outlet 14 into the interior of the housing which acts to direct air to the exhaust outlet.
A base 6 connects to the housing body 12. In addition to providing additional structural rigidity, base 6 forms part of the mounting platform for the ventilation fan 10.
As shown in Fig. 2, base 6 is a square plate having a circular opening defined by wall 5 that is sized to fit snugly into opening 18 in housing 12. A pair of vertical walls 15 extend perpendicularly to base 6 from opposite sides. Each vertical wall 15 is equipped with a mounting channel 16 for mounting the ventilation fan to the ceiling joists. Metal shafts (not shown) may be fitted into the mounting channels and the end of the shafts connected to the joists in order to securely mount the fan in the ceiling.
2o By minimizing the space between the radially outer edge of the fan 24 and the rounded side surface 4, the diameter of the fan 24 is maximized relative to the housing. In addition, by using a propeller style fan, the size of the air inlet may also be increased relative to the housing as compared to the ventilation fans of the prior art using blower wheels and blower housings. Because use of the space within the housing is maximized, the size of the motor may also be increased. The motor housing and fan assembly therefore results in a more powerful vertical design bathroom fan as compared to the vertical designs of the prior art. In addition, costs may be reduced as fewer materials are required, specifically, no outer casing is necessary.
An alternative embodiment is shown in Fig. 3. All aspects of the alternative embodiment that are identical to the preferred embodiment have been marked with identical reference numbers. As shown in Fig. 3, base 6B may be formed integrally with the housing body 12. The positioning of the mounting channels may also be varied depending on how the ventilation fan will be seated in the ceiling. The mounting channel 16 in Fig. 2 is slightly more elevated relative to the base 6, than the mounting channel 16B relative to base 6B shown in Fig. 3. The ceiling drywall would be seated below the base 6B of the bathroom fan shown in Fig. 3 and beside the vertical wall 15 of the bathroom fan shown in Fig. 1. Further variation of the to positioning of the mounting channels is contemplated depending on the desired mounting of the bathroom fan.
A further alternative embodiment of a bathroom ventilation fan 50 is shown in Fig. 4.
In this design, the housing 52 is substantially square, having top and side surfaces and an open bottom. A motor 62 and at least one propeller fan 64 are adapted to be mounted within the housing. An exhaust opening 54 is formed in one side of the housing. A planar portion 56 projects into the housing interior and acts as an air barrier when the fan(s) are in operation, directing air out of the exhaust opening 54.
An air-guiding plate 60 is connected to the interior of the housing 52. Air guiding plate 2o 60 is a substantially square plate having an opening defined therein. One side of the plate is bisected by a cut from the outer edge to the opening. The plate 60 is connected to the housing such that upper terminal edge 70 is seated above the exhaust opening 54 and connected to the upper edge 74 of planar portion 56 and the lower terminal edge 72 is connected to the lower edge 76 of planar portion 56.
Preferably the plate is made of metal and is machined into the appropriate shape and then welded to the interior of the housing (the housing also being metal).
Alternatively, screws or other fasteners may be used to hold the plate in place.
A further alternative embodiment of a bathroom ventilation fan 50 is shown in Fig. 4.
In this design, the housing 52 is substantially square, having top and side surfaces and an open bottom. A motor 62 and at least one propeller fan 64 are adapted to be mounted within the housing. An exhaust opening 54 is formed in one side of the housing. A planar portion 56 projects into the housing interior and acts as an air barrier when the fan(s) are in operation, directing air out of the exhaust opening 54.
An air-guiding plate 60 is connected to the interior of the housing 52. Air guiding plate 2o 60 is a substantially square plate having an opening defined therein. One side of the plate is bisected by a cut from the outer edge to the opening. The plate 60 is connected to the housing such that upper terminal edge 70 is seated above the exhaust opening 54 and connected to the upper edge 74 of planar portion 56 and the lower terminal edge 72 is connected to the lower edge 76 of planar portion 56.
Preferably the plate is made of metal and is machined into the appropriate shape and then welded to the interior of the housing (the housing also being metal).
Alternatively, screws or other fasteners may be used to hold the plate in place.
The opening in plate 60 is shaped so that when the plate is connected to the housing 52, the inner edge of the plate defining the opening abuts the motor 62 mounted in the housing.
The housing 52 is equipped with a venturi plate 66 that connects to the bottom edges of the sides walls of the housing. A pair of vertical walls 67 extend up perpendicularly from plate 66. A mounting channel forms part of each vertical wall 67, either by being attached thereto by screws or the like, or by being integrally formed therewith. The venturi plate 66 has a circular air opening 68 defined therein corresponding to the io diameter of the fans. Air is drawn in through air opening 66 by the fans 64 and forced upwards into contact with air-guiding plate 60 which directs the air out exhaust opening 54. As with the preferred embodiment, the space between the fans and the air-guiding plate increases in the direction of rotation of the fans from the lower terminal edge 72 to the upper terminal edge 70, thereby improving the air flow within the ventilation fan 50.
A further alternative embodiment is illustrated in Figs. 5 and 6. Bathroom ventilation fan 100 is designed horizontally. The housing 110 has a main body portion 108 that is preferably square, and a venting body portion 102. An air inlet 114 is formed in the 2o base of the main body portion. The venting body portion 102 extends from the main body portion tapering to an exhaust opening 104. The tapering of the venting body portion from the main body portion to the exhaust opening increases the efficiency of the ventilation fan.
Indents 106 are formed in at least two of the walls of the housing. A motor 122 is connected to mounting brackets 130 which in turn are connected by way of screws 90 or the like to the indents 106 in the housing 110. At least one fan 126 is connected to the drive shaft of the motor 122. The motor is mounted such that its drive shaft is located in a horizontal plane and so that it acts to rotate fan 126 in a vertical plane.
Preferably, the fan is of the propeller type and its diameter is slightly less than the width of the side walls of the main body portion 108. The fan and motor are located adjacent to, and offset from, the air inlet 114. When in operation, the fan rotates perpendicular to the air inlet 114.
A removable access plate 112 connects to the base of the housing. By removing the access plate, a user has easier access to the motor and fan should any maintenance be required. This is also useful when the ventilation fan is first put together as it provides assembly workers with greater access to the interior of the housing.
io The housing is connected to base plate 116 that also has an opening defined therein that aligns with opening 114. Base 116 has a pair of vertical walls 135 and mounting channels 136. A grille 118 to be connected to the housing after installation in a ceiling is also shown in Fig. 5.
In this embodiment, the fan 126 is proximal to the opening relative to the motor 122.
Consequently, the motor 122 is proximal to the exhaust opening 104 relative to the fan 126. When the fan 126 is in operation, it creates an area of negative pressure between the fan 126 and the opening 114. By positioning the fan and motor further from the air opening, the relative noise levels can be reduced.
A further alternative embodiment is shown in Figs. 7 and 8. In this embodiment, the ventilation fan 200 is similar to ventilation fan 100 shown in Figs. 5 and 6.
However, the positioning of the motor 222 and fan 226 has been reversed, such that the fan 226 is proximal to the exhaust opening relative to the motor 222. Reversing the positioning of the fan 226 and motor 222 makes for easier access to the mounting brackets for installment of the motor 222 (or for maintenance purposes). In turn, the opening need not be as large, so no access plate is necessary. Also, with this arrangement, only the fan need be offset from the inlet opening 214, allowing the motor 222 to occupy some of the space above the opening.
Furthermore, in this embodiment, base plate 216 forms the bottom of the housing.
Base plate 216 has a pair of vertical walls 235 and mounting channels 236.
By horizontally mounting the motor and fans, limitations with respect to the space above a ceiling are avoided. This is illustrated by the further alternative embodiment shown in Fig. 9. Ventilation fan 300 has a square opening 316 in the bottom 312 of the main body portion 308 of housing 310. The square opening is dimensioned to fit between the joists of the ceiling. Mounting channels 336 are connected to the housing 310. The ventilation fan is mounted between the joists with the fans 326, io motor 322 and exhaust opening 304 running parallel to the joists. Flange 314 abuts the surface of the ceiling. Because there is no limit to the space lengthwise between the joists, the ventilation fan 300 can be larger than the vertical fans of the prior art, while still fitting within a standard ceiling.
is It will be appreciated by those skilled in the art that the preferred and alternative embodiments have been described in some detail but that certain modifications may be practiced without departing from the principles of the invention.
tt
The housing 52 is equipped with a venturi plate 66 that connects to the bottom edges of the sides walls of the housing. A pair of vertical walls 67 extend up perpendicularly from plate 66. A mounting channel forms part of each vertical wall 67, either by being attached thereto by screws or the like, or by being integrally formed therewith. The venturi plate 66 has a circular air opening 68 defined therein corresponding to the io diameter of the fans. Air is drawn in through air opening 66 by the fans 64 and forced upwards into contact with air-guiding plate 60 which directs the air out exhaust opening 54. As with the preferred embodiment, the space between the fans and the air-guiding plate increases in the direction of rotation of the fans from the lower terminal edge 72 to the upper terminal edge 70, thereby improving the air flow within the ventilation fan 50.
A further alternative embodiment is illustrated in Figs. 5 and 6. Bathroom ventilation fan 100 is designed horizontally. The housing 110 has a main body portion 108 that is preferably square, and a venting body portion 102. An air inlet 114 is formed in the 2o base of the main body portion. The venting body portion 102 extends from the main body portion tapering to an exhaust opening 104. The tapering of the venting body portion from the main body portion to the exhaust opening increases the efficiency of the ventilation fan.
Indents 106 are formed in at least two of the walls of the housing. A motor 122 is connected to mounting brackets 130 which in turn are connected by way of screws 90 or the like to the indents 106 in the housing 110. At least one fan 126 is connected to the drive shaft of the motor 122. The motor is mounted such that its drive shaft is located in a horizontal plane and so that it acts to rotate fan 126 in a vertical plane.
Preferably, the fan is of the propeller type and its diameter is slightly less than the width of the side walls of the main body portion 108. The fan and motor are located adjacent to, and offset from, the air inlet 114. When in operation, the fan rotates perpendicular to the air inlet 114.
A removable access plate 112 connects to the base of the housing. By removing the access plate, a user has easier access to the motor and fan should any maintenance be required. This is also useful when the ventilation fan is first put together as it provides assembly workers with greater access to the interior of the housing.
io The housing is connected to base plate 116 that also has an opening defined therein that aligns with opening 114. Base 116 has a pair of vertical walls 135 and mounting channels 136. A grille 118 to be connected to the housing after installation in a ceiling is also shown in Fig. 5.
In this embodiment, the fan 126 is proximal to the opening relative to the motor 122.
Consequently, the motor 122 is proximal to the exhaust opening 104 relative to the fan 126. When the fan 126 is in operation, it creates an area of negative pressure between the fan 126 and the opening 114. By positioning the fan and motor further from the air opening, the relative noise levels can be reduced.
A further alternative embodiment is shown in Figs. 7 and 8. In this embodiment, the ventilation fan 200 is similar to ventilation fan 100 shown in Figs. 5 and 6.
However, the positioning of the motor 222 and fan 226 has been reversed, such that the fan 226 is proximal to the exhaust opening relative to the motor 222. Reversing the positioning of the fan 226 and motor 222 makes for easier access to the mounting brackets for installment of the motor 222 (or for maintenance purposes). In turn, the opening need not be as large, so no access plate is necessary. Also, with this arrangement, only the fan need be offset from the inlet opening 214, allowing the motor 222 to occupy some of the space above the opening.
Furthermore, in this embodiment, base plate 216 forms the bottom of the housing.
Base plate 216 has a pair of vertical walls 235 and mounting channels 236.
By horizontally mounting the motor and fans, limitations with respect to the space above a ceiling are avoided. This is illustrated by the further alternative embodiment shown in Fig. 9. Ventilation fan 300 has a square opening 316 in the bottom 312 of the main body portion 308 of housing 310. The square opening is dimensioned to fit between the joists of the ceiling. Mounting channels 336 are connected to the housing 310. The ventilation fan is mounted between the joists with the fans 326, io motor 322 and exhaust opening 304 running parallel to the joists. Flange 314 abuts the surface of the ceiling. Because there is no limit to the space lengthwise between the joists, the ventilation fan 300 can be larger than the vertical fans of the prior art, while still fitting within a standard ceiling.
is It will be appreciated by those skilled in the art that the preferred and alternative embodiments have been described in some detail but that certain modifications may be practiced without departing from the principles of the invention.
tt
Claims (9)
1. A bathroom ventilation fan comprising:
a substantially cylindrical housing having a top and a bottom, and having a cylindrical side surface and an air inlet opening;
a motor housed within said housing and being longitudinally disposed therein;
at least one fan having a plurality of fan blades, said fan being connectable to, and rotatable by, said motor, said fan rotating perpendicular to the longitudinal axis of said cylindrical housing;
an exhaust outlet located in said housing; and a space between said fan blades and said top surface of said housing, said space increasing in the direction of rotation of said fan from one side of said exhaust outlet to the opposite side of said exhaust outlet.
a substantially cylindrical housing having a top and a bottom, and having a cylindrical side surface and an air inlet opening;
a motor housed within said housing and being longitudinally disposed therein;
at least one fan having a plurality of fan blades, said fan being connectable to, and rotatable by, said motor, said fan rotating perpendicular to the longitudinal axis of said cylindrical housing;
an exhaust outlet located in said housing; and a space between said fan blades and said top surface of said housing, said space increasing in the direction of rotation of said fan from one side of said exhaust outlet to the opposite side of said exhaust outlet.
2. The bathroom ventilation fan of claim 1 wherein said fan further comprises:
an inner collar; and an outer cylindrical stabilizing element;
wherein said fan blades project radially from said inner collar to said outer cylindrical stabilizing element.
an inner collar; and an outer cylindrical stabilizing element;
wherein said fan blades project radially from said inner collar to said outer cylindrical stabilizing element.
3. The bathroom ventilation fan of claim 1 wherein said side surface extends downward from, and perpendicularly to, said top surface, terminating at a bottom end thereby forming said air inlet opening, said air inlet opening being circular.
4. The bathroom ventilation fan of claim 2 wherein said side surface and said stabilizing element being substantially concentric.
5. The bathroom ventilation fan of claim 1 wherein said cylindrical housing further comprises a columnar channel within which said motor is connected to said housing.
6. The bathroom ventilation fan of claim 5 wherein said top surface spirals about said columnar channel.
7. The bathroom ventilation fan of claim 1 wherein said side surface extends downward from, and perpendicularly to, said top surface, terminating at a bottom plate having said air inlet opening defined therein, said inlet opening being circular.
8. The bathroom ventilation fan of claim 7 wherein said bottom plate has a pair of opposed side walls.
9. The bathroom ventilation fan of claim 8 wherein said opposed side walls have mounting channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002442046A CA2442046C (en) | 2003-09-17 | 2003-09-17 | Bathroom ventilation fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002442046A CA2442046C (en) | 2003-09-17 | 2003-09-17 | Bathroom ventilation fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2442046A1 CA2442046A1 (en) | 2005-03-17 |
| CA2442046C true CA2442046C (en) | 2008-12-09 |
Family
ID=34318773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002442046A Expired - Fee Related CA2442046C (en) | 2003-09-17 | 2003-09-17 | Bathroom ventilation fan |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2442046C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213619A (en) * | 2014-07-21 | 2014-12-17 | 博麟水电材料有限公司 | Bath lavatory ventilator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963157B (en) * | 2010-09-30 | 2011-12-14 | 大连理工大学 | High total pressure large-flow wheel disk side beveling type back-ward impeller fan |
| CN109611355A (en) * | 2018-11-29 | 2019-04-12 | 曾固 | A kind of big flow field acting device of air-flow and application |
-
2003
- 2003-09-17 CA CA002442046A patent/CA2442046C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213619A (en) * | 2014-07-21 | 2014-12-17 | 博麟水电材料有限公司 | Bath lavatory ventilator |
| CN104213619B (en) * | 2014-07-21 | 2016-03-02 | 博麟水电材料有限公司 | Bath lavatory ventilation fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2442046A1 (en) | 2005-03-17 |
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